• 专利附录
  • 专利说明
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    • 专利摘要:
    A standalone light-emitting element display tile (100), such as, for example, a light-emitting diode (LED) display tile (100) and method (300), is disclosed. The standalone light-emitting element display tile (100) can be a lighting fixture, an image display device and / or a video display device. The standalone light-emitting element display tile (100) comprises a portable board (110) with each arrangement of light-emitting elements (112) thereon, a control module (120) and a power module (150). In one embodiment, the standalone light-emitting element display tile (100) is a fully autonomous and independent light-emitting element display tile (100) that characterizes wireless communication and battery power, with no signal cables or power cables connected to the standalone light-emitting element display tile (100). Further, a method (300) is provided for using currently disclosed standalone light-emitting element display tile (100).
    公开号:BE1026271B9
    申请号:E20195303
    申请日:2019-05-08
    公开日:2020-01-20
    发明作者:Robbie Thielemans；Vince Dundee
    申请人:Stereyo Bvba；
    IPC主号:
    专利说明:

    STAND-ALONE DISPLAY TILE WITH LIGHT EMITTING ELEMENT AND METHOD
    Technical field
    The subject matter now disclosed relates generally to light-emitting diode (LED) display technology and more particularly to a standalone LED display tile and method. In a broader sense, the invention relates to display technology that uses or is based on light-emitting elements (such as LEDs but also, for example, OLEDs and QLEDs) and more particularly to a stand-alone display tile that uses or is based on such light-emitting elements. emitting elements and method.
    BACKGROUND OF THE INVENTION
    Electronic displays, such as LED displays, are often used to display advertising content. For example, electronic displays are used in traditional point-of-sales environments, such as shop windows and shopping centers, to display advertising content. For example, LED screens are designed to process digital information, such as streaming video. However, systems that support LED displays can be expensive, complex and difficult to manage. For example, an LED display system may include a playout server, a media player, a computer, a network connection, and a large number of cables for interconnecting and powering all components. That is why new approaches are needed to display advertising content that is simple and inexpensive.
    Accordingly, the object of the invention is to provide a display system and method that overcomes the shortcomings of the solutions described above.
    Summary of the invention
    In a first aspect of the invention, a display system is provided which is capable of operating as a standalone and comprises a portable board and an arrangement of a number of light-emitting elements on the portable board, for example arranged in a row defining the screen. The arrangement of a number of light-emitting elements is arranged on the board, as well as a corresponding number of light-emitting element drives thereon, for driving the light-emitting elements such that a single light
    BE2019 / 5303 emitting driver (or drive) is assigned for each of the multiple luminous elements. The display system further comprises a control module which is also provided or mounted on the portable board for providing, for example, all necessary control instructions for the drivers, and thus for controlling the light-emitting drivers. The display system also includes a power supply module provided on the portable board for supplying power, e.g. all necessary or required, on the number of light-emitting element drives on the one hand and on the control module on the other, more particularly for example on the active parts of the control module. The possibility for standalone operation of the display system means that a processor that is otherwise needed to send the video or images to the display system in some way, through some protocol, and is generally quite expensive, is not longer. The video or images can be saved directly, for example on the display system. The standalone aspect can also increase the interactivity of the display system. Among applications in the field may be mentioned, for example, large stadium events such as sports competitions or concerts, applications with fixed installations, e.g. advertisement and the rental and staging business. In an embodiment of the invention, a fully standalone version of the display system is defined which (essentially consists of) the above-mentioned features.
    According to an embodiment, the control module of the display system comprises a means for board communication that can be connected to the number of light-emitting element drivers (or element drives), a data storage module, more particularly a non-volatile data storage module in which e.g. video files and / or images are stored, and a controller adapted for controlling the means for board communication as well as for controlling the data storage module. The means for board communication may comprise a buffer module and a board interface connected thereto. The control module can further comprise a communication interface that provides wireless communication and the controller can be further adapted to control the communication interface. In addition, the control module can be adapted to communicate with a remote control via the communication interface to receive control data for use by the controller and / or to be stored in the data storage module.
    BE2019 / 5303
    In an embodiment of the invention, the display system has a control module, more particularly comprising a controller, which is adapted to be temporarily in communication via the communication interface with an external processing device or module for loading data into the data storage module, with which the data to be displayed is stored. Such data to be displayed are, for example, digital video files, digital image files, lighting scheme files, and may optionally also include digital audio files and further optionally any type of control data for the controller.
    In a preferred embodiment, the control module of the display system, even more particularly the controller thereof, is adapted to process such temporary communication via the communication interface with the external processing device or module when the external processing device or module is a processing device for general purposes. By way of example, such a general purpose processing device is, for example, any mobile computer device, such as a mobile phone (e.g., a smartphone), a smartwatch, a tablet device, a laptop computer, or the like. Preferably, the adjustments provided for in the controller to be adapted to handle such temporary communication may provide for handling such temporary communication for a number of different general purpose processing devices.
    According to an embodiment, the power module of the display system comprises an energy storage module such as a battery system, which may or may not be rechargeable. According to a special embodiment, in addition to the battery system, photovoltaic cells are also arranged on the display system for additional charging of the battery system. Such photovoltaic cells are mounted, for example, between the light-emitting elements.
    In an embodiment of the invention, the display system capable of operating standalone further comprises (one or more) other technology module (s) used in combination with the illumination and / or display functionality of the display system and the control module. More specifically, the controller can in particular be adapted to operate the (one or more) other technology module (s). As an example, the other can
    BE2019 / 5303 technology module are an audio system, while the data storage module is then further adapted for storing digital audio files. The other technology module can also be a robotics or motorized system, while the data storage module is then further adapted to store motor control data. Moreover, the controller is then adapted, for example, to control the movement of a (motorized) robot arm or motor while the motor control data is used in coordination with video or image data (and optionally playing audio) of the data storage module running on the display system.
    According to an embodiment, the display system comprises a housing, frame or body that encloses the various parts or modules. Such a housing can in particular be designed for the application and is for instance made of only one or two pieces (e.g., back and / or cover) to create a fairly simple and smoothly finished display system (e.g., with rounded corners), such as e.g. a light-emitting diode (LED) display tile. By way of example, an application in which beautifully finished tiles are desired, for example a large stadium event such as a sports competition, e.g. American football, soccer or a concert, where a few hundred or thousands of people hold a tile in the audience, all together displaying a video or image on it. Depending on the arrangement and therefore how people generally stand, sit or are in general, the way in which the video or image is presented or the light effect can be adjusted. Furthermore, the video or image can be stored in the tile in advance by way of example and can be played when the tile is activated by means of a start or push button. The tile itself therefore contains the content and can therefore be played stand-alone (on its own). In addition to a start or push button, the tile can also include one or more other action buttons, such as, for example, a voting button when tiles are used in a voting environment. Television programs, such as e.g. talent shows or competitions can be devised in this context, whereby the audience that has a tile can also vote for their favorite artist or give their opinion, or can generally respond to a question asked. A wireless receiver or transceiver (e.g., for acknowledging receipt) that responds to at least one synchronization signal can be provided in each tile, whereby each tile can be activated to display the correct content. With receiver and
    BE2019 / 5303 transmitter, or transceiver provided, the transmit channel could also be used to transmit to other display tiles within a display arrangement that includes multiple display tiles. By means of an algorithm the sender or the transceiver system could find out where which tile is located and at what time. A computer could process this information in real time, so that the content to be played can be dynamically mapped, even when people in a public change their position, i.e., walk and move among themselves continuously. With a battery system that can be recharged or not, the tile can be powered wirelessly. The memory size for data storage of e.g. video or images to be saved and played back depend on the number of light emitting elements, the number of colors, possible compression techniques and in particular the market or application for which the tiles or the display system must be built. For example, a 15-second video may suffice as a gadget, while for a fixed installation, e.g. advertisement 1 hour video would probably be more appropriate. The format of the content on the tile can be the entire video or else only a part of it will be saved that will be displayed on the tile. It will be understood that systematic sharing, splitting and combining of video or images will be required and therefore the invention also relates to methods for suitable processing of data such as video or images for use on the tiles in accordance with the invention, more in in particular ensuring a data size adapted to the size of the data storage module. In addition, the colors of the light-emitting elements could be dynamically adjusted, depending on the content of the video or images, by a color calibration technique, creating the impression that much deeper saturated colors can be seen.
    According to an embodiment, the display system comprises a gyroscope, also known as gyro, in which, for example, position coordinates (e.g. x, y, z) and rotation can be read and interpreted. As an example, a large virtual image could be stored within a display tile, and depending on the movement of the tile, a portion of the virtual image is scanned and displayed on the tile, e.g. in real time with the movement. Furthermore, such a virtual image can be, for example, a panoramic image that is scanned and viewed from left to right and vice versa on the tile, due to tile movement
    BE2019 / 5303 for example because a person holding the tile moves or turns the tile from left to right and vice versa. Other gimmicks to be mentioned can be, for example, a water level with an image (taken with camera or saved), or a selfie application based on a selfie photo that was initially taken with the smartphone and then uploaded wirelessly to the tile. A person then turning and moving the tile towards himself can, for example, scan himself with the tile. A greater degree of interactivity thus comes to the surface, with interactive content to be displayed on a display tile, even when such content has not been processed at all.
    In a second aspect of the invention, a one-tile configuration is provided comprising a display system in accordance with the first aspect of the invention, more particularly in accordance with the specific embodiments thereof, wherein the control module comprises a communication interface which in wireless communication. The one-tile configuration further comprises a remote control for providing control data to the display system, which is in wireless communication with the remote control.
    In a third aspect of the invention, a one-tile configuration is provided comprising a display system in accordance with the first aspect of the invention, more particularly in accordance with the specific embodiments thereof, wherein the control module comprises a communication interface which in wireless communication. The one-tile configuration further comprises an external processing device or module, and the display system is in wireless communication with the external processing device or module to wirelessly send video data (and / or audio and / or control data) to the data storage module of the control module .
    In a fourth aspect of the invention, a one-tile configuration is provided consisting of a display system according to the first aspect of the invention, more particularly in accordance with the specific embodiments thereof, wherein the control module comprises a communication interface, which in wireless communication provides. The one-tile configuration further comprises an external processing device or module, and the display system
    BE2019 / 5303 is in wireless communication with the external processing device or module to wirelessly transmit video data (and / or audio) and control data to the data module of the control module.
    In a fifth aspect of the invention, a multi-tile configuration (or multi-tile configuration) is provided including a plurality of display systems in accordance with the first aspect of the invention, more particularly in accordance with the specific embodiments thereof, wherein the control module comprises means for board communication includes connectable to the number of light-emitting element drivers, a data storage module and a controller adapted to control the means for board communication and the data storage module. The multi-tile configuration further comprises one or more remote controls and / or one or more external processing devices or modules, each of which is in wireless communication.
    According to an embodiment, at least one of the multiple display systems of the multi-tile configuration in accordance with the fifth aspect, is adapted to wirelessly transmit synchronization signals to at least one other of the multiple display systems, further adapted to receive such synchronization signals wirelessly. More specifically, the at least one of the multiple display systems, which transmits wirelessly, is adapted to act as the main tile (or master) between the other of the multiple display systems that are defined as slave tiles, and receive wirelessly. The designation of a main tile can change over time. In fact, any tile could be appointed as a new master when the old one failed. Conversely, each tile can also be called a slave tile. As a result of such a backup when a master fails, synchronization can be ensured continuously due to the fact that a master and its slaves are always available.
    In a further aspect of the invention, a method is provided for using a display system capable of operating standalone (or independently), in accordance with the first aspect of the invention. The method comprises the steps of (i) providing one or more display systems; (ii) loading the one or more display systems with
    BE2019 / 5303 data; (iii) selecting the data to be displayed or generally displayed, and then starting playback; and (iv) suspending the data being displayed or brought.
    In one embodiment of such a method, one display system is provided that is capable of operating standalone according to a one-tile configuration in accordance with the second, third or fourth aspect of the invention.
    In another embodiment of such a method, multiple display systems capable of operating standalone are provided in a multi-tile configuration in accordance with the fifth aspect of the invention.
    In summary, the invention relates to a display system, also referred to as a display tile, because the size of the related board is chosen to be portable, typically a tile size. The invention furthermore relates to a board with light-emitting elements mounted thereon. Such light-emitting elements can be classic LEDs (light-emitting diodes), but alternative LEDs such as OLEDs (organic LEDs), QLEDs (quantum dot LEDs), COB LEDs (chip-on-board LEDs) can be used.
    The invention relates to a kind of the above-mentioned display systems, which are adapted and / or arranged and / or are capable of operating standalone (independently), i.e. fully autonomously operating in terms of connections outside the system and / or independent in terms of operational logic, preferably both autonomy and independence are provided. It is worth emphasizing that such displays can work in the modes indicated above (autonomy and / or independence), but not in some embodiments. More in particular, means can also be provided for connecting to outside the system and / or operating under the control of external systems. However, the adjustments and / or arrangement are such that all necessary elements to support the indicated modes are present with the system.
    BE2019 / 5303
    The invention relates to a standalone display system, in which a single display tile works completely standalone in itself, but also in which several display tiles of the same type or type (for example all LED, or OLED or QLED) alternatively work together as a single standalone display consisting of said multiple display tiles.
    The invention further relates to computer program products that can be operated either on the controller of said tile and / or a processing device, which is part of an external device, for performing one of the steps of the methods discussed above and a non-standard temporary machine-readable storage medium in which the computer program product is stored. The invention further relates to databases configured to be used in a computer environment and adapted to track the tiles and store information regarding which data is to be displayed on which tile.
    Overview of the drawings
    The features and advantages of the present invention will be more clearly understood from the following description in conjunction with the accompanying drawings, which are not necessarily drawn to scale.
    Figure 1 and Figure 2 illustrate, respectively, a front perspective view and a rear perspective view of an embodiment in accordance with the invention, more particularly an example is shown of currently disclosed standalone light emitting element display tile, such as a standalone LED display tile.
    Figure 3 illustrates a block diagram of an example of the control electronics of currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile.
    Figure 4 shows examples of configurations with one tile of currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile.
    Figure 5 shows examples of multi-tile configurations of currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile.
    BE2019 / 5303
    Figure 6 illustrates a flow chart of an example of a method for using currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile.
    Figure 7 illustrates a rear perspective view of an example of currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile that includes other on-board technology.
    Figure 8 shows an example of a multi-tile configuration of currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile in communication with other separate technology.
    Figure 9 illustrates a chromaticity diagram (for reference only).
    Fig. 10 illustrates a graph of a measure of the power level for the light-emitting elements, e.g. LEDs as a function of a measure of the voltage across the battery, for a standalone LED display tile according to the invention.
    Description of the invention
    In some embodiments, the subject matter now described provides a standalone (or self-contained) light-emitting element display tile, e.g. a standalone LED, OLED or QLED display tile and method. The presently disclosed standalone light-emitting element display tile can, for example, be used as a lighting fixture (for example for applications with background lighting and / or light effects), an image display device and / or a video display device. The standalone light-emitting element display tile comprises a light-emitting element board (e.g., an LED, OLED or QLED board) with an arrangement of light-emitting elements thereon, a control module and a power supply module. In one embodiment, the standalone light-emitting element display tile is a fully autonomous and independent light-emitting element display tile with wireless communication and battery power, with no signal cables or power cables connected to the standalone light-emitting element display tile.
    A main feature of the currently disclosed standalone light-emitting element display tile is that it does not require the continuous presence and / or use of an external processing device or module. For example, in some embodiments, the
    BE2019 / 5303 standalone light-emitting element display tile in communication with an external processing device or module to load only its content, wherein, once the content is loaded, the standalone light-emitting element display tile no longer needs to be in communication with the external processing device or module; namely standalone operation follows.
    The presently disclosed standalone light-emitting element display tile can work in configurations with one tile or configurations with multiple tiles. In some embodiments, the self-contained light-emitting element display tile can act as a lighting fixture and be programmed with certain light schemes and / or light effects. In some embodiments, the self-contained light-emitting element display tile may act as a digital display for displaying digital image content and / or digital video content. Furthermore, the now-disclosed standalone light-emitting element display tile can act as a hand-held and / or portable display device and / or lighting fixture.
    Furthermore, any type of information can be used by the control module of the currently disclosed standalone light-emitting element display tile. The control module can be used, for example, to store and process video information, image information, lighting scheme information, audio information, control information and / or any other type of information. An example of another type of information is control information for controlling and / or controlling robotics (for example a robot arm in projection systems).
    Figure 1 and Figure 2 illustrate, respectively, a front perspective view and a rear perspective view of an example of the currently disclosed standalone light-emitting element display tile 100, such as e.g. a standalone LED display tile 100 (hereinafter referred to as LED display tile 100). LED display tile 100 can be used, for example, as a lighting fixture (for example for applications with background lighting and / or light effects), an image display device and / or a video display device. Furthermore, LED display tile 100 is easily portable or can be used as a fixed display device and / or lighting fixture. Furthermore, LED display tile 100 can act as a handheld and / or portable display device and / or lighting fixture.
    BE2019 / 5303
    LED display tile 100 includes an LED board 110 that supports an arrangement of LEDs 112 and a number of LED drivers 114, with LED drivers 114 mounted on the back of LED board 110. LED board 110 is mounted in a frame or body 116. Furthermore, LED display tile 100 includes a control module 120 and a power or power module 150. Control module 120 and power module 150 are installed in frame or body 116 behind LED board 110.
    In the example shown in Figure 1 and Figure 2, LED board 110 supports a 16 x 16 series of LEDs 112, set to a pitch (or spacing) of, for example, about 20 mm x about 20 mm. In this example, LED display tile 100 can be considered as a low resolution display. Furthermore, LEDs 112 (or pixels) can be RGB LEDs (or RGB pixels), white LEDs (or white pixels) or color LEDs (or color pixels). LED drivers 114 can be standard LED drivers for distributing control information from the control module 120 to each of the LEDs 112.
    The 16 x 16 series of LEDs 112 shown in Figure 1 and Figure 2 is only an example. LED board 110 can include any arrangement of LEDs 112; namely, any number and series of LEDs 112, and set to each pitch ranging from, for example, about 2 mm to about 40 mm. For example, LED display tile 100 can be from 1 pixel per tile to a series of 500 x 500 pixels per tile. Accordingly, the overall size of LED display tile 100 can vary depending on the arrangement and spacing of LEDs 112.
    Control module 120 includes the control electronics for managing the overall operation of LED display tile 100. Any lighting content, digital image content and / or digital video content to be presented using LED display tile 100 is stored locally and managed by control module 120. Using control module 120, a main feature of LED display tile 100 is that there are no signal cables. More details of the control module 120 are shown and described with reference to Figure 3.
    In one example, power module 150 provides battery power to LED display tile 100, such as a non-rechargeable or rechargeable battery. Namely, the power module 150 can be one
    BE2019 / 5303 contain rechargeable battery that can be charged using solar energy or standard power. In another example, power module 150 may include a power transmitter and receiver, such as an electromagnetic induction power transmitter and receiver. Using power module 150, a main feature of LED display tile 100 is that there are no power cables. More details of the control module 120 are shown and described with reference to Figure 3.
    Because LED display tile 100 provides (1) locally stored content that is managed internally using control module 120, (2) wireless communication that does not require physical signal cables, and (3) battery power that does not require physical power cables, a fully autonomous and provides an independent LED display tile that is simple and inexpensive on the one hand (ie no complex and expensive support system and network required) and on the other hand is easily portable and / or transportable.
    Figure 3 illustrates a block diagram of an example of the control electronics (e.g., control module 120) of the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100. In this example, the control module 120 comprises a controller 122, a communication interface 124, a buffer module 126, an LED board interface 128 and a quantity of data storage 130. Furthermore, power module 150 supplies power to all active components of control module 120.
    Controller 122 can be any standard controller or microprocessor device that can execute program instructions. Controller 122 manages the overall operations of LED display tile 100. In particular, controller 122 can be used to manage the content presented on LED display tile 100. Data storage 130 can be any volatile or non-volatile memory device. Data storage 130 can be built into or separated from controller 122. Furthermore, data storage 130 can be any combination of built-in and portable memory, such as a secure digital (SD) card. An example of information stored in data storage 130 are digital video files 132, digital image files 134, lighting scheme files 136, digital audio files 138 and any type of control data 140. Control data 140 may be control information of other devices, systems
    BE2019 / 5303 and / or technologies that can be used in coordination with lighting applications as described below with reference to Figure 7 and Figure 8. In one example, control data 140 may be control information for controlling and controlling robotics (e.g., a robot arm in projection systems).
    Communication interface 124 can be any wired and / or wireless communication interface for connection to a network (not shown) and with which information can be exchanged with other devices connected to the network. Examples of wired communication interfaces may include, but are not limited to, USB ports, RS232 connectors, RJ45 connectors, Ethernet, and combinations thereof. Examples of wireless communication interfaces can be, but are not limited to, an intranet connection, internet, mobile networks, ISM, Bluetooth® technology, Bluetooth® Low Energy (BLE) technology, WiFi, Wi-Max, IEEE 402.11 technology , ZigBee technology, Z-Wave technology, GLoWPAN technology (ie IPv6 via Low Power Wireless Area Network (GLoWPAN)), ANT or ANT + (Advanced Network Tools) technology, radio frequency (RF), Infrared Data Association (IrDA) compatible protocols , Local Area Networks (LAN), Wide Area Networks (WAN), Shared Wireless Access Protocol (SWAP), combinations thereof and other types of wireless network protocols, such as, but not limited to, standard protocols for light control systems such as DMX, ARTnet, DALI, KNX, CAN, ACN and BACnet protocol. In one embodiment, sub-GHz (868 MHz or 915 MHz) modulation can be used for long-distance wireless communication.
    Buffer module 126 can be any video buffer device. In LED display tile 100, buffer module 126 is data storage (or memory) that is used to store video or graphic information as it moves from the renderer (e.g., Controller 122) to the display screen (e.g., LED board 110). The output of buffer module 126 supplies to LED board interface 128 which then passes information to LED drivers 114 on LED board 110. LED board interface 128 can be any type of physical and / or electrical connection between control module 120 and LED board 110.
    Frame or body 116 of LED display tile 100 can include any design and / or mechanical fastening mechanisms for holding control module 120 and
    BE2019 / 5303 power module 150. In one example, control module 120 may be a customized printed circuit board (PCB). In another example, the control module 120 may be a currently available single-board computer (SBC) or single-board system on a chip (SoC) platform, including, for example, computer processing capacity, data storage capacity, wired communication capabilities (e.g., Ethernet), wireless communication capabilities ( e.g. Wi-Fi, Bluetooth®), router capability, programmable input / output (I / O) capabilities and the like.
    In one example, the control module 120 is implemented using the well-known Raspberry Pi 3 platform available from The Raspberry Pi Foundation (UK), see www.raspberrypi.org. However, control module 120 can be implemented using other single-board computers, such as, but not limited to, the Orange Pi PC 2 platform available from Shenzhen Xunlong Software CO., Limited (www.orangepi.org) and the Asus Tinker Board available at ASUSTeK Computer Ine. (Taipei, Taiwan). In another example, the control module 120 may be a custom controller (e.g., microchip available from STMicroelectronics, flash microcontroller available from Renesas Electronics Corporation, and the like).
    In some embodiments, individual LEDs 112 of LED display tile 100 or each LED display tile 100 as a whole may comprise a polarizer (e.g., 3D polarizer). For example, depending on the type of polarizer, a 3D image or other visual effect can be generated.
    Figure 4 shows examples of configurations with one tile of the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100. For example, in a configuration with one tile 200, a single LED display tile 100 is provided in combination with a remote control 205, such as an infrared (IR) based remote control. In one example, a user preloads portable memory, such as an SD card, with content such as one or more digital video files 132, digital image files 134, lighting scheme files 136, digital audio files 138 and / or any type of control data 140. Next, the user inserts the SD card in the control module 120.
    BE2019 / 5303
    The user then uses remote control 205 to select the content to be displayed and to start playback. In the case of digital video files 132, the selected digital video file 132 runs continuously until it is interrupted by remote control 205. In the case of digital image files 134, the selected digital image file 134 is continuously displayed until interrupted by remote control 205. Furthermore, LED display tile 100 is used as a lighting fixture, such as for background lighting in a light box for displaying an advertising poster. In this case, the selected lighting scheme file 136 runs continuously until it is interrupted by remote control 205.
    In one example, the power module 150 may be a battery pack that includes a rechargeable battery. In one example, the rechargeable battery can be charged via USB or a power bank. In another example, the battery can be periodically removed and charged separately from the LED display tile 100.
    In yet another example, the rechargeable battery of power module 150 can be charged using energy-applying devices such as, but not limited to, solar, pelletier, wireless power generators and the like. For example, one or more solar cells 152 may be integrated into the plane of LED board 110, such as between LEDs 112. In this example, the rechargeable battery charges during the day. Content can then be played overnight using the stored energy in the battery. Furthermore, since the input voltage and current may vary depending on the light received by solar cells 152, the local processing device (e.g., controller 122 of control module 120) in LED display tile 100 can use this information to automatically adjust the light output, pulse width modulation (PWM) and / or current settings to optimize the brightness and / or playing time of LED display tile 100.
    In another example, the power module 150 comprises an integrated power supply unit (PSU) instead of the rechargeable battery, the LED display tile 100 being connected to the AC grid.
    BE2019 / 5303
    Still referring to Figure 4, in a single tile configuration 210, a single LED display tile 100 is provided in combination with remote control 205 as well as with a control device 215. Control device 215 can be any computer device that can communicate wirelessly (e.g., via Bluetooth®) with LED display tile 100. For example, control device 215 can be any mobile computing device, such as a mobile phone (e.g., a smartphone), a smartwatch, a tablet device, a laptop computer, and the like. Further, in the case of a smartphone or tablet, a mobile app 216 can be installed and run on control device 215. Mobile app 216 can be, for example, a mobile iOS app for an Apple iPhone or a mobile Android app for an Android phone. For example, mobile app 216 can be used to load content onto LED display tile 100, to read the content already loaded on LED display tile 100, and / or to select and initiate the desired content to display.
    In one example, control device 215 is used to wirelessly send content to data store 130 of control module 120. Next, the user uses either remote control 205 or control device 215 to select the content to be displayed and start playback. In one embodiment, the functionality of remote control 205 can be fully taken over by control device 215 (and its mobile app 216). Once the content has been launched on LED display tile 100, control device 215 can be removed while LED display tile 100 is operating independently. In some embodiments, at a later time, a control device 215 other than the original control device 215 may be used with a particular LED display tile 100. In some embodiments, multiple control devices 215 may be used with a particular LED display tile 100.
    Figure 5 shows examples of multi-tile configurations of the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100. For example, in a multi-tile configuration 220, multiple LED display tiles 100 are provided to form a larger display. Namely, in LED display tile 100, display tile means displays that can be arranged side by side while maintaining the pixel spacing across the boundaries of the display tile. Multiple LEDs can be used in this way
    BE2019 / 5303 display tiles 100 are seamlessly arranged to form a larger display. A 2x2 arrangement of LED display tiles 100 is shown in Figure 5. However, this is only an example. Any number and arrangement of LED display tiles 100 is possible.
    Multi-tile configuration 220 shows multiple LED display tiles 100 in combination with remote control 205 and a multi-tile configuration 225 shows multiple LED display tiles 100 in combination with remote control 205 and control device 215. In each multi-tile configuration of LED display tiles 100, one of the LED display tiles 100 set as the master tile, while the remaining LED display tiles 100 are set as the slave tiles. Figure 5 shows, for example, four LED display tiles 100 - the main tile or master which is LED display tile 100 M, and then the slave LED display tiles 100 S1, 100 S2 and 100 S3. The master LED display tile (e.g., LED display tile 100 M) can be set automatically via programming in controller 122 of control module 120 or set manually, for example by setting a switch (not shown) to control module 120, where the status of the switch can be interrogated by controller 122.
    In this example, the LED display tile 100 M controls itself and the slave LED display tiles 100 S1, 100 S2 and 100 S3. In operation, LED display tiles 100 M, 100 S1, 100 S2 and 100 S3 receive their content for playback. Video playback requires the video frames of all 100 M, 100 S1, 100 S2 and 100 S3 LED display tiles to be synchronized so that each frame on each tile is updated at the same time. LED display tile 100 M is used to manage the synchronization by processing the synchronization signals between tiles.
    Namely, the LED display tile 100 M periodically sends a synchronization signal (e.g., every 16.66 ms (or 60 Hz)) to the LED display tiles 100 S1, 100 S2 and 100 S3 so that each tile can play exactly the same frame of the video. In one example, the entire video content can be stored on each of the four LED display tiles 100 M, 100 S1, 100 S2 and 100 S3. That is, LED display tiles 100 M, 100 S1, 100 S2 and 100 S3 are loaded with the same content (i.e. global content). Overall, each LED display tile 100 has stored the same content therein and then processes the content locally to extract the portion to be displayed. In another example, however, the video content can be pre-processed and
    BE2019 / 5303 split into several different parts (i.e. specific content), each part correlating with a certain LED display tile 100 M, 100 S1, 100 S2 and 100 S3. Each of the 100 M, 100 S1, 100 S2 and 100 S3 LED displays then plays the corresponding part of the video content.
    In some embodiments, the synchronization process can be managed by control device 215 instead of a master LED display tile 100. In this scenario, control device 215 can be used, for example, to (1) pre-edit the video content, image content, and / or the lighting content for the multiple LED display tiles 100, (2) send content and control information to the multiple LED display tiles 100, and (3) as soon as they are output (or content is being played) to send the synchronization signal to the multiple LED display tiles 100.
    In some embodiments, mechanisms are built in to ensure reliable operation of multi-tile configurations. In the event, for example, that the master tile (e.g., LED display tile 100 M) fails, a new master tile can be determined among the slaves by means of a specific protocol operating between the slave tiles. For example, if the slave tiles have not received a synchronization signal from the master tile for a predetermined time, a new master tile between the slave tiles can be determined by a specific protocol operating between the slave tiles. This fallback procedure is also called "no fault" operation, which means that despite the failure of the master tile, the overall system will not fail.
    Further, while each of the LED display tiles 100 can include a power transmitter and receiver, adjacent LED display tiles 100 can be automatically charged onto a chain by transferring energy from one tile to the next, for example by electromagnetic induction techniques.
    According to an embodiment, an antenna system is provided to ensure that the LED display tiles receive a synchronization signal, preferably all at the same time. Moreover, within the synchronization signal, the current frame and / or video number may be embedded in such a way that each tile knows what to play. Multiple short
    For example, BE2019 / 5303 video files of a few seconds or minutes are stored on the LED display tiles. The synchronization signal ensures that each tile plays the right video at the right time. Further, for example, a computer could send a signal to the antenna or radio in a timed manner to initiate the signaling process.
    For example, while reference is made to fixed installation business (or applications), a master tile sends for synchronization with the other slave tiles, until, for example, a new advertising order has to be uploaded. In one embodiment, the content could be uploaded via Bluetooth and / or Wi-Fi from a smartphone. In the event that we make the ACN or ARTnet and / or DMX communication protocol compatible, the LED display tile could even be operated via lighting consoles in the rental and staging world. Moreover, referring further to rental and staging, an intermediate step could be provided in which the lighting console is coupled to the antenna system that processes the scan, ARTnet and / or DMX commands into usable signals for the LED display tile. The LED display tile can then serve as a lighting device, including the display of video depending on the DMX channels as programmed by a (human) lighting operator.
    According to a further embodiment, an environment e.g. sports stadium are considered with multiple LED display tiles that are each held by one person. Now suppose no synchronizing signal is provided, although any LED display tile can receive and send signals. Taking into account the position and more particularly the proximity of tiles to each other, the content of the tiles can still be manipulated in a certain way, even in real time. For example, when a person with an LED display tile T1 approaches another person with an LED display tile T2, the contents of tile T1 or tile T2, or of both tiles T1 and T2, can be modified adaptively, for example in such a way that e.g. , only the color or the entire content of the image is changed.
    Figure 6 illustrates a flow chart of an example of a method 300 for using the currently disclosed standalone light-emitting element display tile,
    BE2019 / 5303 such as a standalone LED display tile 100. Method 300 may, but is not limited to, including the following steps.
    At a step 310, one or more LED display tiles 100 are provided. In one example, one LED display tile 100 is provided according to a one-tile configuration 200 or 210 shown in Figure 4. In another example, multiple LED display tiles 100 are provided according to multiple tile configuration 220 or 225 shown in Figure 5.
    At a step 315, the one or more LED display tiles 100 are loaded with content. In one example, a user pre-loads portable memory, such as an SD card, with content such as one or more digital video files 132, digital image files 134, lighting scheme files 136, digital audio files 138 and / or any type of control data 140. Next, the user inserts the SD card in the control module 120. In another example, control device 215 (e.g., smartphone, smartwatch, tablet device, laptop computer) is used to wirelessly send content to data storage 130 of control module 120.
    At a step 320, the content to be displayed is selected and playback is started. For example, the user uses remote control 205 or control device 215 to select the content to be displayed and to start playback.
    At a step 325, the content being displayed is suspended. For example, the user uses remote control 205 or control device 215 to interrupt content playback.
    In method 300, the presence and / or use of an external processing device or module with the one or more LED display tiles 100 is optionally used only in step 315. On the other hand, at steps 320 and 325, when the one or more LED display tiles 100 are active (or playing content), there is no need for an external processing device or module.
    BE2019 / 5303
    Figure 7 illustrates a rear perspective view of an example of the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100 that includes other on-board technology, e.g., other technology 250 built into LED display tile 100. Other technology 250 may, for example, any other device, system and / or technology and any combination thereof that can be used in coordination with lighting applications, such as the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100. In one example, other technology may 250 are built into audio devices (eg, speakers). In this example, the playlist of LED display tile 100 can contain both digital video files 132 and digital audio files 138, so that LED display tile 100 can play both video and associated audio. Playlist means, for example, a collection of data (or content) that is stored for playing or being executed on the LED display tile 100, or to activate the LED display tile 100 (cf. Robotics).
    In another example, other technology 250 can be built into engines of a robot system. In this example, LED display tile 100 can play video and associated audio along with engine instructions that can activate one or more motors that are built into or attached to LED display tile 100. These motors of the robotics system can, for example, display LED display tile 100 move or move in 3D space. In this example, the playlist of LED display tile 100 can include digital video files 132, digital audio files 138, and motor control data 140, so that LED display tile 100 can play video, play audio, and move in 3D space. In this way one can imagine that LED display tile 100 plays video, plays audio and moves itself.
    Figure 8 shows the multi-tile configuration 225 shown in Figure 5 and an example of the multiple LED display tiles 100 in communication with other technology 250 that is separate from the multiple LED display tiles 100. As described with reference to Figure 7, other technology 250 may include, for example, other devices, systems and / or technologies and any combination thereof that can be used in coordination with lighting applications. In one example, other technology 250 may be an audio system and / or an audio device that is wirelessly connected to, for example, LED display tile 100 M, with LED display tile 100 M
    BE2019 / 5303 provides digital audio files 138 to the audio system to play in coordination with the video running on LED display tiles 100. In another example, other technology 250 may be a robotics system in which, for example, each LED display tile 100 or groups of two or more LED display tiles 100 can be manipulated via robot arms. In this example, each of the LED display tiles 100 can be wirelessly connected to the associated robot arm in which motor control data 140 is used to control the movement of the robot arm in coordination with the video running on the associated LED display tile 100.
    Referring again to Figures 1 to Figure 8, features of the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100, may include (but are not limited to): a cable-less display; cheap; no local processing; wireless communication; master tile possibility; sync signal capability; dual calibration and calibration in the case of RGB LEDs; voltage to LEDs <5V (low power); sub-GHz wireless communication for long distance; wide range from 1 pixel / tile to 500 x 500 pixels / tile; DMX, ARTnet and ACN control; local flash or SD card (hard disk); content can be tile bound or global; all color LEDs, devices for applying energy for power; fully autonomous (i.e., no signal or power cables); and portable, handheld and / or portable.
    Fig. 9 illustrates a chromaticity diagram 500, which is provided as a reference for the discussion to follow with regard to the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100. As is known, a chromaticity diagram, such as chromaticity diagram 500, is a triangular line (or shape) that connects the chromaticities of the spectrum of colors. In the case of chromaticity diagram 500, this line defines a color triangle 510. The curved line within color triangle 510 of chromaticity diagram 500 shows where the colors of the spectrum are and is called the spectral locus. In particular, a black body curve 512 is the spectral locus for white light. Combinations of colors, such as shades of blue, green, yellow, orange and red, blend along black body curve 512 and produce white light. The wavelengths along black body curve 512 are indicated in nanometers. Furthermore, Figure 9 shows the range of CTs along the length of the black body curve 512. For example, the end of the black body curve 512 that is in the vicinity of the
    BE2019 / 5303 blue area, indicates a 30000K CT (cool light) and approaches infinity. In contrast, the end of the black body curve 512 located near the red region indicates a 2500K (warm light) CT and approaches zero. In addition, those skilled in the art will understand that the more colors of the spectrum are present with sufficiently high energy levels within a white light source, the higher the CRI (color rendering index) of the white light source and thus the higher the quality of the white light.
    Still referring to Figure 9, it is well known in the color industry that quantitative figures for colors and wavelengths of visual colors are not very simple. There are countless examples of refinement, but there are no generic formulas for defining a human 'perceived' color. Several attempts have been made and one of the best known is the color space of the CIE 1931, but regardless of these attempts, the influence of the color band of the narrow band versus the broadband color is different from the human eye.
    It can be easily demonstrated that totally different colors measured, for example with the aid of a spectrometer in the CIE 1931 color space, with different brightness are observed almost exactly the same for the human eye. In that respect, (narrow-band) colors that are not considered sufficiently saturated by the human eye can be closely compared with a less (narrow-band) color emitter with different brightness. Accordingly, for a display, a perceptual color gamut extension can be made (e.g., a color with Brightness A in the CIE1931 graph of (0.14; 0.8) can be observed exactly the same as color (0.13; 0.65) with brightness B), which is perceived as much more saturated color.
    In the case of an RGB display, such as the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100, (but this method is not exclusive to RGB screens), changing the saturated color points also changes the white point of the display. It goes without saying that we do not want the original white dot to change.
    BE2019 / 5303
    Accordingly, a method is provided to hold the white point of the screen. Namely, in a first step, when showing the saturated color, show the observed saturated color. In a second step, when white is displayed, display the saturated color as it is. In a third step, a weight factor is applied for each color between the first and second step, which depends on the content. This weight factor determines how much value must be attributed to the observed color and the true saturated color. For example, when color is pure the saturated color to be displayed, the weight factor is 1. The general formula is, for example: saturated color * weight factor + (1 weight factor) * non-saturated color. Suppose, for example, that blue does not work well and therefore decreases in brightness, but thus gives a different color impression. The brightness is then compensated in such a way that the correct blue color impression is returned. In the case of white, this brightness compensation must be canceled completely. When a mixed color is presented which includes blue, the compensation will be somewhere in between and therefore not fully active as in blue, nor will it be completely canceled as in white. The example of blue is specifically mentioned, since the human eye can react very strange to the color blue.
    Furthermore, with regard to the power module 150 of the currently disclosed standalone light-emitting element display tile, such as a standalone LED display tile 100, certain techniques can be applied to extend the operational life of batteries. LED display tile 100 can, for example, be implemented as a standalone by using a battery pack (e.g. power supply module 150). This battery pack can consist of rechargeable batteries, such as Li-ion cells. A Lithium button cell package can be used for lower power applications. Although also important for a standard Li-ion package, the procedure described below is more focused on the use of lithium button cells, because the proposed method and invention can have the greatest impact on lithium button cells (nevertheless it can certainly be used for standard battery packs). As an example of such a lower power application using a lithium button cell package, an LED wristband can be referred to.
    BE2019 / 5303
    It is well known in the industry that for Li-ion cells, voltage across the battery is an indication of the total charge of the battery (standard Li-ion cells operate between 2.7V and 4.2V, with 4.2V fully charged). Although there are similarities, there is one factor that has become very important when using lithium button cells. Draining a battery with a certain current A compared to draining a battery with 2A current is completely different. 2A draining the battery does not mean that the battery is drained much faster, but extremely faster. This is due to the reduced thickness of the battery and the chemical regeneration process cannot recover quickly enough. Details of this specific behavior have been studied and documented, such as in Performance characteristics or Li-ion cell for use in wireless sensing systems - Yin Zhang, 20112 - chemical engineering department; Brigham Young University.
    Derivation from the theory shows that draining batteries with a constant current A (and A being above a certain chemical threshold of the battery structure) drains the battery extremely quickly. However, draining the battery with current 3xA in time B and with a dead time of 3xB has a much better effect on the service life. In this 3xB period or longer, the battery chemistry has a recovery time, while this is not the case in the constant A-time. This means that the battery system has a transition current point (i.e., the point when it exceeds, the service life is no longer linear with drawn current).
    The methods described below are examples of how the display drive electronics of, for example, the currently disclosed standalone light-emitting display tile, such as a standalone LED display tile 100, can be made to extend the visual life of this particular display. Note: these methods are also valid for audio and the like. The fact that audio and video intensity or brightness is non-linear also helps with visual / audible perception (for example, perceived visual brightness up to 50% is actually 25% on real power).
    Methods to extend the service life
    1. Characterization of the battery set
    a. Determine the maximum voltage
    b. Determine the minimum voltage
    BE2019 / 5303
    c. Determine the transition flow point (A)
    d. Determine the recovery time tB for a reference current B
    2. Implementation of LED drive electronics
    a. Processing devices that must always be active must draw less than A.
    b. In case a is not possible, make sure that the device is running in on / off state, where the recovery time is> tB
    c. A PWM circuit is implemented for LED and audio. The PWM bit depth must be large enough for the desired performance, e.g. 12bit
    3. Implementation A and now referring to plot 400 shown in Figure 10 - case of battery voltage can be measured
    a. Measure the battery voltage at specific intervals
    b. Depending on the values determined in 1, a multiplication factor is applied to the total desired PWM
    c. The multiplication factor can be linear, but exponential functions can also be applied and (of course) give much more service life (for example, when measured battery voltage = maximum voltage, then multiplication factor = 1; when battery voltage = minimum voltage, multiplication factor = 0.001)
    4. Implementation B - no voltage measurement possible
    a. This implementation requires some memory. Determine the total arrival time of the colors at start-up
    b. Collect the total on time
    c. This total on time is a function of the voltage across the battery
    d. Then carry out the step that is also determined in 3
    5. Alternative / extra functions
    a. In the case of R / G / B LEDs, additional visual factors can be applied to extend the service life
    b. When displaying RGB, reduce the total current for individual LEDs to 1/3 so that the total current when displaying R is the same and RGB
    c. This is just an example and there are all kinds of variations
    BE2019 / 5303
    d. (analogy with sound is when using 2 or more audio channels)
    BE2019 / 5303
    权利要求:
    Claims (17)
    [1]
    Conclusions
    A display system (100) suitable for working as a standalone, comprising:
    - a portable plate (110);
    - an arrangement of a number of light-emitting elements (112) on the portable board (110);
    - a plurality of light-emitting element drives (114) on the portable board (110), one allocated for each of the plurality of light-emitting elements (112);
    - a control module (120) on the portable board (110) for controlling the light-emitting element drives (114), wherein the control module (120) comprises a data storage module (130) which stores the data to be displayed; and
    - a power module (150) on the portable board (110) for supplying power to both the number of light-emitting element drives (114) and the control module (120).
    [2]
    The display system (100) of claim 1, wherein the control module (120) comprises a means for board communication that can be connected to the plurality of light-emitting element drives (114), a data storage module (130), and a controller (122) adapted for controlling the board communication means and the data storage module (130).
    [3]
    The display system (100) according to claim 2, wherein the board communication means comprises a board interface (128), which transmits the data to be displayed to the light-emitting element drives (114) and a buffer module (126) connected thereto, buffer module (126) is used to store the data to be displayed while moving from the controller (122) to the board interface (128).
    [4]
    The display system (100) according to claim 2 or 3, wherein the control module (120) further comprises an interface (124), which provides wireless communication and the controller (122) is further adapted to control the communication interface ( 124).
    [5]
    The display system (100) according to claim 2, 3 or 4, wherein the control module (120) is further adapted for communication via the communication interface (124) with a remote control for receiving control data (140) for use by the controller (122) and / or to be stored in the data storage module (130).
    BE2019 / 5303
    [6]
    The display system (100) according to claim 2, 3, 4 or 5, wherein the control module (120), more particularly the controller (122) thereof, is adapted to be temporarily in communication via the communication interface ( 124) with an external processing device or module for loading data into the data storage module (130), storing the data to be displayed.
    [7]
    The display system (100) of claim 6, wherein the control module (120), even more particularly the controller (122) thereof, is adapted to process such temporary communication when the external processing device or module is a processing device for general purposes.
    [8]
    The display system (100) according to claims 1 to 7, wherein the power module (150) comprises an energy storage module which may or may not be rechargeable.
    [9]
    The display system (100) according to claims 1 to 8, further comprises another technology module that is used in combination with lighting and / or display functionality of the display system (100) and the controller (122) adapted to operate the other technology module.
    [10]
    The display system (100) of claim 9, wherein the other technology module is an audio system, and the data storage module (130) is further adapted to store digital audio files.
    [11]
    The display system (100) of claim 9, wherein the other technology module is a robotics or motorized system and the data storage module (130) is further adapted to store motor control data, and the controller (122) is adapted to control the movement of a robot arm or motor to manipulate the display system (100) thereby moving the display system (100) in 3D space while the motor control data is used in coordination with video or image data and / or audio playing from the data storage module (130) that runs on the display system (100).
    [12]
    The display system (100) of claim 1, wherein the plurality of light-emitting element drives (114) are mounted on the rear of the portable board (110); and the control module (120) and / or power module (150) are installed behind the portable board (110).
    BE2019 / 5303
    [13]
    A one-tile configuration (200) comprising a display system (100) according to claims 4 to 12 and a remote control (205) for providing control data (140) to the display system (100), in wireless communication with the remote control (205).
    [14]
    A one-tile configuration (210) comprising a display system (100) according to claims 4 to 12 and an external processing device or module or module, in particular according to claim 6, and more particularly according to claim 7, wherein the display system (100) is in wireless communication with the external processing device or module to wirelessly transmit video data and / or audio and / or control data (140) to the data storage module (130) of the control module (120).
    [15]
    A one-tile configuration (210) consisting of a display system (100) according to claims 4 to 12, and an external processing device or module, in particular according to claim 6, and more particularly according to claim 7, wherein the display system (100) is in wireless communication with the external processing device or module to wirelessly transmit video data and / or audio and / or control data (140) to the data storage module (130) of the control module (120).
    [16]
    A multi-tile configuration (220, 225) comprising a plurality of display systems (100) according to claims 2 to 12, further comprising remote controls (205) and / or external processing devices or modules, each of which is in wireless communication.
    [17]
    The multi-tile configuration (220, 225) of claim 16 wherein at least one of the plurality of display systems (100) is adapted to wirelessly transmit synchronization signals to at least one other of the plurality of display systems (100), further adapted to wirelessly receive synchronization signals, more in particular the at least one of the plurality of display systems (100) is adapted to act as a master tile (100-M) among the other of the plurality of display systems (100) that are identified as slave tiles (100- S1, 100-S2, 100-S3).
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    同族专利:
    公开号 | 公开日
    BE1026271B1|2019-12-12|
    BE1026271A1|2019-12-05|
    EP3791258A1|2021-03-17|
    EP3567469A1|2019-11-13|
    WO2019215219A1|2019-11-14|
    BE1026271A9|2020-01-15|
    US20210225267A1|2021-07-22|
    引用文献:
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    法律状态:
    2020-01-23| FG| Patent granted|Effective date: 20191212 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201862668521P| true| 2018-05-08|2018-05-08|
    EP18198749.6A|EP3567469A1|2018-05-08|2018-10-04|Standalone light-emitting element display tile and method|
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