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    • 专利摘要:

    公开号:NL2005385A
    申请号:NL2005385
    申请日:2010-09-23
    公开日:2011-01-25
    发明作者:Leann Marie Rohrich；Johannes Petrus Kamer
    申请人:Irex Technologies B V；Irx Innovations B V；
    IPC主号:
    专利说明:

    EDGELESS DISPLAY DEVICE HAVING ACTIVELY-CONTROLLED BORDER FIELD OF THE INVENTION
    The invention relates to a display device for displaying an electronic document page. The invention also relates to a method of displaying an electronic document page on such display device. The invention further relates to a computer program product comprising instructions for causing a processor to carry out such method. The invention further relates to applications of the display device of the invention.
    BACKGROUND OF THE INVENTION
    A display device of the type mentioned in the opening paragraph is known from the international patent application US2006/0227196. This patent application discloses an electronic ink display which comprises two substrates. One of the substrates is transparent and is provided with a single electrode which is referred to as the counter electrode. This counter electrode is in other literature also referred to as common electrode or backplane electrode. The other substrate is provided with picture electrodes which comprise row and column electrodes. A display element or pixel is associated with an intersection of a row electrode and a column electrode. A pixel electrode of the display element is coupled to the column electrode via a thin film transistor (further referred to as TFT), the gate of which is coupled to the row electrode. This arrangement of display elements, TFT transistors and row and column electrodes together forms an active matrix. A row driver sequentially selects rows of display elements and the column driver supplies data signals to the selected row of display elements via the column electrodes and the TFT transistors. The data signals correspond to graphic data to be displayed.
    An electronic ink is provided between the pixel electrode and the common electrode. The electronic ink comprises multiple microcapsules of about 10 to 50 microns. Each microcapsule comprises positively charged white particles and negative charge black particles suspended in a fluid. When a positive voltage is applied to the pixel electrode with respect to the common electrode, the positively charged white particles move to the side of the micro capsule directed to the transparent substrate on which the common electrode is present and a viewer will see a white display element. Simultaneously, the black particles move to the pixel electrode at the opposite side of the microcapsule where they are hidden to the viewer. By applying a negative voltage to the pixel electrode with respect to the common electrode, the black particles move to the common electrode at the side of the micro capsule directed to the transparent substrate and the display element appears dark to a viewer. When the voltage is removed, the display device remains in the acquired state and thus exhibits a bi-stable character. The electronic ink display with its black and white particles is particularly useful as an electronic book.
    Grey scales are created in the display device by controlling the amount of particles that move to the common electrode at the top of the microcapsules. For example, the energy of the positive or negative electric field in the pixel caused by the voltage difference between the pixel and common electrodes, defined as the product of field strength and time of application, controls the amount of particles moving to the top of the microcapsules.
    A multi-level drive of the pixel electrodes enables to more closely reach a desired light output of a pixel because it is possible to more accurately control the movement of the particles at a lower value of the drive voltage. However, such a multilevel drive of the pixel electrodes requires complex display drivers.
    GB2454030A discloses an electronic document reading device that is a device such as an electronic book which presents a document to a user on a display to enable the user to read the document. In particular, a display device is disclosed for displaying an electronic document page comprising a central rewritable portion, a non-rewritable border with external lateral physical dimensions defined by the display edges, wherein said border is colored to substantially match a background color of said central rewritable portion such that when a foreground part of said document page is displayed on said central rewritable portion the appearance of margins of said document page is provided by said background colored border. As a consequence, in use, said displayed electronic document page appears to extend up to said display edges, and wherein the surface of the display is substantially flat over the lateral physical dimensions from the central rewritable portion across the border to the display edges. The device may be controlled via a touch sensitive interface.
    A problem of the known electronic document reading device is that the border color is fixed, i.e. it can not be changed after manufacture.
    SUMMARY OF THE INVENTION
    It is a first object of the invention to provide a display device for displaying an electronic document page, the display device having a border with a border color that can be dynamically changed in operational use. It is a second objection of the invention to provide a method of displaying an electronic document page on a display device.
    The invention is defined by the independent claims. The dependent claims define advantageous embodiments.
    In a first aspect, in accordance with the first object, the invention relates to a display device as claimed in claim 1.
    The effect of the features of the invention is as follows. The provision of a display panel covering both a display region and a border region in combination with the provision of the second driver circuit enables to actively control the border region by setting at least one color therein. It is here mentioned that in GB2454030A the non-rewritable border is undriven and therefore has a fixed color, i.e. the non-rewritable border is a passive element. The invention provides an edgeless display device wherein the border region is capable of playing an active role in the displaying. Such active border region opens up a wide range of additional features and applications.
    In an embodiment of the display device in accordance with the invention there is provided an analyzer which analyzes the content of the electronic document page. From this content a control signal is derived for the second driver circuit in order to obtain the color of the border region. In this embodiment the color of the border region is conveniently adapted to the content of the electronic document page, i.e. a content-dependent border color is obtained.
    In an embodiment of the display device in accordance with the invention the analyzer is configured for determining a new value of a background color from the content of the electronic document page, wherein the analyzer is further provided with a memory for storing an actual value of the background color in operational use of the display device, and wherein the analyzer is configured for comparing the new value with the actual value, and for controlling the respective driver circuit only if the new value is different from the actual value, in operational use of the display device. Advantage of this embodiment power consumption is reduced.
    In an embodiment of the display device in accordance with the invention the display region and the border region comprise a same display panel type. In a first main variant of such embodiments the display region and the border region are contained in a single display panel, wherein in a second main variant the display region and the border region are contained in separate display panels. In embodiments the only difference may be that the border region has larger pixels or that the border region comprises only one (large) pixel.
    In an embodiment of the display device in accordance with the invention the display region and the border region comprise a different display panel type. For example, the display region comprises an electrophoretic display panel while the border region comprises an LCD display panel or alternatively the display region comprises an LCD display panel while the border region comprises an electrophoretic display panel. An advantage of this embodiment is that the display screen of the border region can be tuned for a better performance of the display device. In that embodiment the border region may be provided with a display panel type having a bi-stable behavior so that power consumption can be reduced.
    In an embodiment of the display device in accordance with the invention the border region is pixilated. This embodiment enables to provide more features by individual and/or group-wise setting of the pixel colors in the border region.
    In an embodiment of the display device in accordance with the invention the border region is non-pixilated. The advantage of this embodiment is its relative simplicity, i.e. the second control circuit can be a relatively simple circuit, because it only has to generate one border color per border or border sub-region.
    In an embodiment of the display device in accordance with the invention the display region (50) comprises a bi-stable display panel.
    In an embodiment of the display device in accordance with the invention the border region (55, 55’, 55”, 55”’) comprises a bi-stable display panel. In an embodiment of the display device in accordance with the invention the bi-stable display panel comprises an electrophoretic display panel (which is an example of a bi-stable display panel). Such display panel can be of the in-plane switching type or of the verticalswitching type. Both sub-types are well-known to the person skilled in the art. For instance, in-plane switching is well-described in US2006/0227196 and vertical-switching is well- described in from US2005275933. Both documents are hereby incorporated by reference in their entirety.
    In an embodiment of the display device in accordance with the invention the bi-stable display panel comprises a bi-stable LCD display panel. Some LCD display panel types also exhibit a bi-stable behavior which renders this display technology also suitable for being used in the display region or border region, when power dissipation is critical.
    In an embodiment of the display device in accordance with the invention, in operational use of the display device, the color of the border region is set such that its color is perceived as matching with a background color of the display region when displaying the electronic document page. The advantage of this embodiment is that the user will experience the border of the display device as the margin of the document. Consequently, the display region can be more efficiently used, i.e. the document to be display can be cropped towards its contents parts and scaled up such that it fully covers the display region. Cropping electronic documents for this purpose is well-known and well described GB2454030A.
    It known from literature that the color properties which are inherently distinguishable by the human eye are hue, saturation and brightness, which can be put in perspective with a CIE chromaticity diagram. The CIE system characterizes colors by a luminance parameter Y and two coordinates x and y which specify the point on the chromaticity diagram. In addition to the L(Y)*x*y* system, L*u*v* and L*a*b* systems are often used, where L* stands for lightness, a* and b* or u* and v* are coordinates. All the parameters are measurable for a display device and a color difference (ΔΕ*) can be derived according to the measured results on two different display portions. For example, when we use L*a*b* system, the lightness L*1 and coordinates a*1 and b*1 are experimentally obtained on display region and the lightness L*2 and coordinates a*2 and b*2 on border region, we may obtain ΔΙ_*= L*1- L*2, Aa*= a*1- a*2 and Ab*=b*1- b*2, so a color difference between these two display regions are obtained by AE*ab=[ (Δθ*)2 + (Ab*)2 + (Ι<ΔΙ_*)2]1/2,where k=1 for samples in close proximity. In view of this definition, preferably, in last mentioned embodiment the color difference AE*ab between the border region and the background color is smaller than 10, preferably below 5, more preferably below 1.5, and even more preferably below or equal to 1.0.
    It will be apparent that it is not essential to make use of the fully border in this invention. The invention may be applied on one side of the display region. In an embodiment it is applied on two opposing sides, for example on the left and the right side of the display region. In another embodiment the border region fully surrounds the display region. It is a matter of choice which parts around the display region are used for the purpose of virtual display screen enhancement in accordance with the invention.
    In a second aspect, in accordance with the second object, the invention relates to a method as claimed in claim 21. The method has corresponding embodiments having similar advantages as the display device of the invention.
    In a third aspect, the invention relates to a computer program product comprising instructions for causing a processor to perform the method in accordance with the invention.
    These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter.
    BRIEF DESCRIPTION OF THE DRAWINGS
    In the drawings:
    Fig. 1 shows a display device in accordance with an embodiment of the invention;
    Fig. 2 shows a block diagram of the display device of Fig. 1;
    Fig. 3 shows diagrammatically a cross-section of a portion of an electrophoretic display device, and
    Fig. 4 shows diagrammatically an equivalent circuit diagram of a portion of the electrophoretic display device.
    List of reference numerals: 1 electrophoretic matrix display panel 2 base substrate 3 transparent substrate 4 transparent substrate 5, 5’ transparent picture electrodes 6 common electrode 7 micro capsule 8 white particles 9 black particles 10 row driver 11 column or data electrodes 12 drivelines 13 (incoming) display data 15 processor 16 column driver 17 row or select electrodes 18 display element 19 active switching elements 20 gate electrodes 21 source electrodes 22 pixel electrodes 23 capacitor 24 storage capacitor lines 25 backplane driver 26 control signals 29 polymeric binder VD data signal VG gate electrode voltage VP voltage from backplane driver 30 analyzer 40 first driver circuit for display region 45 second driver circuit for border region 50 display region 55 border region 55’ left and right parts of border region 55 55” top and bottom parts of border region 55 55”’ corner parts of border region 55 99 device control buttons of display device 100 display device 150 memory
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
    In order to facilitate the discussion of the detailed embodiments a few expressions are defined hereinafter.
    Fig. 1 shows a display device in accordance with an embodiment of the invention. The figure is purely schematic in order to explain important aspects of the invention. The display device 100 comprises a display panel, i.e. a bi-stable display panel such as an electrophoretic display panel (E-ink, E-paper). The display device further comprises device control buttons 99, in this example located at the bottom side of the device (but this is not essential to the invention). The bi-stable display panel is divided into a display region 50 located in the middle of the screen, and a border region 55 surrounding the display region 50. The border region 55 comprises sub-regions on the left and right side 55’, sub-regions on the top and bottom side 55” and sub-regions at the corners 55’”. It will be apparent that the invention is applicable to any selection out of these sub-regions or even to parts of those sub-regions. Furthermore, the sub-regions may be controlled by a same signal (such that all pixels obtain the same color) or by different signals (such that different pixels will obtain different colors). The invention is not limited to bi-stable display panels or to any combination of display panels. Any panel type may be used. Moreover, a display region with a bi-stable display panel may be combined with a border region with a non-bi-stable display panel, or vise versa.
    Fig. 2 shows a block diagram of the display device of Fig.1. In this embodiment the invention at least adds two blocks 45, 55 to the existing display devices, which is indicated by the dashed box in the figure. The display device comprises an analyzer 30 for receiving and analyzing display data 13. The analyzer controls the first driver circuit 40 as well as the second driver circuit 45. The first driver circuit 40 controls the display region 50 and the second driver circuit 45 controls the border region 55. It must be noted that the second driver circuit is controlled by the analyzer and adapted to control the border region in response to the display data. In an example a background color is extracted from the display data and used for setting the border color to substantially match with the background color. However, many variations to this are possible each variation having its own corresponding application or feature.
    In a possible variation of the embodiment in Fig. 2 there is provided a further dedicated analyzer (not shown) for the border region 55 (coupled to the second driver circuit). Such shifting of functionality is considered to fall within the scope of the invention as claimed.
    In Fig. 2 the second driver circuit 45 receives a control signal that depends on the display data. However, it is also possible to provide the second driver circuit with a different control signal which depends on specific user input (such as a desired photo to be displayed on the border region). The invention can be used for personalizing the display device, i.e. setting a border color, providing pattern on the border, providing a logo on the border, displaying (part of) a photo or other background, etc. The invention can be further extended to a backside of the display device. The same or additional features can be applied there.
    In Fig. 2 two driver circuits 40, 45 are shown. However, both functionalities may be advantageously combined into a single driver circuit that is configured for controlling both the display region 50 and the border region 55. Such variations are considered to fall within the scope of the invention as claimed. Such controlling may be performed sequentially in time or simultaneously.
    Fig. 3 diagrammatically shows a cross-section of a few display elements of an electrophoretic matrix display panel 1, i.e. an example of a bi-stable display panel device. The display panel 1 comprises a base substrate 2, an electrophoretic film with an electronic ink which is present between two transparent substrates 3 and 4 which, for example, are of polyethylene. The substrate 3 is provided with transparent picture electrodes 5, 5’ and the other substrate 4 with a transparent common electrode 6. The electronic ink comprises multiple micro capsules 7, of about 10 to 50 microns. Each micro capsule 7 comprises positively charged white particles 8 and negatively charged black particles 9. The particles 8 and 9 are suspended in a fluid. The dashed material 29 is a polymeric binder. The layer 3 is not necessary and could alternatively be a glue layer. When a negative voltage is applied to the common electrode 6 with respect to the picture electrodes 5, an electric field is generated which moves the white particles 8 to the side of the micro capsule 7 directed to the common electrode 6 and the display element will appear white to a viewer. Simultaneously, the black particles 9 move to the opposite side of the microcapsule 7 where they are hidden to the viewer. By applying a positive field between the common electrode 6 and the picture electrodes 5, the black particles 9 move to the side of the micro capsule 7 directed to the common electrode 6 and the display element will appear dark to a viewer (not shown). When the electric field is removed the particles 7 remain in the acquired state and the display exhibits a bi-stable character and consumes substantially no power. Instead of white and black the particles may have any desired color.
    Fig. 4 shows diagrammatically an equivalent circuit of the matrix display device 1 which comprises an electrophoretic film laminated on the base substrate 2 provided with active switching elements 19, a row driver 16 and a column driver 10. Figure 4 specifies in more detail what the parts 30, 40 and 50 of Fig. 2, i.e. the driving of the display region. For the second driver circuit 45 and the border region 55 similar techniques can be used as for the first driver circuit 40 and the display region 50. Preferably, the common electrode 6 is provided on the film comprising the encapsulated electrophoretic ink. Alternatively, the common electrode 6 could be provided on a base substrate if the operation of the display is based on in-plane electric fields. The display panel 1 is driven by active switching elements, for example, thin film transistors 19. The display device 1 comprises a matrix of display elements at the area of intersecting row or select electrodes 17 and column or data electrodes 11. The row driver 16 consecutively selects the row electrodes 17, while a column driver 10 provides data signals to the column electrodes 11 for the selected row electrode 17. Preferably, a processor 15 firstly processes incoming data 13 into the data signals to be supplied by the column electrodes 11.
    The drive lines 12 carry signals which control the mutual synchronization between the column driver 10 and the row driver 16. Select signals VG from the row driver 16 which are electrically connected to the row electrodes 17 select the pixel electrodes 22 via the gate electrodes 20 of the thin film transistors 19. The source electrodes 21 of the thin film transistors 19 are electrically connected to the column electrodes 11. A data signal VD present at the column electrode 11 is transferred to the pixel electrode 22 of the display element 18 (also referred to as pixel) coupled to the drain electrode of the TFT if the associated TFT is conductive. In the embodiment shown, the display device of Fig.1 further comprises an additional capacitor 23 at the location of each display element 18. This additional capacitor 23 is connected between the pixel electrodes 22 of the associated pixel 18 and one or more storage capacitor lines 24. Instead of a TFT other switching elements can be applied such as diodes, MIM’s, etc.
    The common electrode 6 receives the voltage VB from a backplane driver 25. The backplane driver 25 supplies a sequence of voltages comprising non-zero voltages. The column driver 10 and the row driver 16 may be commonly used drivers. The processor 15 provides control signals 26 to the backplane driver 25 to coordinate the operation of the backplane driver 25 with the column driver 10 and the row driver 16.
    If applicable, the processor 15 may comprise a memory 150 for storing previous drive voltages of the pixels 18 required for a transition drive scheme.
    Alternatively, the memory 150 may be used to store the levels of the correction pulses required for each optical state.
    Various variations of the display device in accordance with the invention are possible and do not depart from the scope of the invention as claimed. For example, the invention may also be implemented in a full color display panel, such as a full-color bistable display panel. The invention may also be applied in combinations of monochrome and colored technology. For example, the display region may be a monochrome display panel, whereas the border region may be a full color display panel. Alternatively, the display region may be a full-color display panel, whereas the border region may be a monochrome display panel.
    The invention thus provides a display device 100 for displaying an electronic document page. The display device 100 comprises: i) a display panel comprising a display region 50 and a border region 55, 55’, 55”, 55”’, wherein the border region 55, 55’, 55”, 55’” abuts at least one side of the display region 50; and ii) a driver circuit (40, 45) coupled to the display region (50) and the border region (55) and being configured for controlling the display region (50) for displaying the electronic document page, and for controlling the border region (55, 55’, 55”, 55’”) such that at least a color of the border region (55, 55’, 55”, 55’”) is set to a desired color to obtain a perceived expansion of the display region (50) into the border region (55, 55’, 55”, 55’”). The advantage of the display device of the invention is that the color of the border region can be dynamically set to any desired color in operational use, which enhances the user’s experience of the display device.
    The invention may be applied in various application areas. For example, the invention may be applied in E-paper applications, electronic readers/writers, laptops, PDA’s, hand-held, multimedia players, cell phones, etc.
    It will be appreciated that the invention also extends to computer programs, particularly computer programs on or in a carrier, adapted for putting the invention into practice. The program may be in the form of source code, object code, a code intermediate source and object code such as partially compiled form, or in any other form suitable for use in the implementation of the method according to the invention. It will also be appreciated that such a program may have many different architectural designs. For example, a program code implementing the functionality of the method or system according to the invention may be subdivided into one or more subroutines. Many different ways to distribute the functionality among these subroutines will be apparent to the skilled person. The subroutines may be stored together in one executable file to form a self-contained program. Such an executable file may comprise computer executable instructions, for example processor instructions and/or interpreter instructions (e.g. Java interpreter instructions). Alternatively, one or more or all of the subroutines may be stored in at least one external library file and linked with a main program either statically or dynamically, e.g. at run-time. The main program contains at least one call to at least one of the subroutines. Also, the subroutines may comprise function calls to each other. An embodiment relating to a computer program product comprises computer executable instructions corresponding to each of the processing steps of at least one of the methods set forth. These instructions may be subdivided into subroutines and/or be stored in one or more files that may be linked statically or dynamically. Another embodiment relating to a computer program product comprises computer executable instructions corresponding to each of the means of at least one of the systems and/or products set forth. These instructions may be subdivided into subroutines and/or be stored in one or more files that may be linked statically or dynamically.
    It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. Use of the verb “comprise” and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article “a” or “an” preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Throughout the Figures, similar or corresponding features are indicated by same reference numerals or labels.
    The following embodiments are considered advantageous: 1. A display device (100) for displaying an electronic document page, the display device (100) comprising: a display panel comprising a display region (50) and a border region (55, 55’, 55”, 55”’), wherein the border region (55, 55’, 55”, 55’”) abuts at least one side of the display region (50), and a driver circuit (40, 45) coupled to the display region (50) and the border region (55) and being configured for controlling the display region (50) for displaying the electronic document page, and for controlling the border region (55, 55’, 55”, 55”’) such that at least a color of the border region (55, 55’, 55”, 55’”) is set to a desired color to obtain a perceived expansion of the display region (50) into the border region (55, 55’, 55”, 55’”).
    2. The display device as described in embodiment 1, wherein the driver circuit comprises a first driver sub-circuit (40) coupled to the display region (50) and a second driver sub-circuit (45) coupled to the border region (55), wherein the first driver sub-circuit (40) is configured for controlling the display region (50) for displaying the electronic document page, and wherein the second driver sub-circuit (45) is configured for controlling the border region (55, 55’, 55”, 55’”) such that at least a color of the border region (55, 55’, 55”, 55’”) is set to a desired color to obtain a perceived expansion of the display region (50) into the border region (55, 55’, 55”, 55’”).
    3. The display device as described in embodiment 1 or 2, further comprising an analyzer (30) for analyzing content of the electronic document page to control the second driver circuit (45) to obtain the color of the border region (55, 55’, 55”, 55’”).
    4. The display device as described in embodiment 3, wherein the analyzer (30) is configured for determining a new value of a background color from the content of the electronic document page, wherein the analyzer (30) is further provided with a memory for storing an actual value of the background color in operational use of the display device, and wherein the analyzer (30) is configured for comparing the new value with the actual value, and for controlling the respective driver circuit (45) only if the new value is different from the actual value, in operational use of the display device.
    5. The display device as described in any one of the preceding embodiments, wherein the display region (50) and the border region (55, 55’, 55”, 55’”) comprise a same display panel type.
    6. The display device as described in embodiment 5, wherein the display region (50) and the border region (55, 55’, 55”, 55’”) are contained in a single display panel.
    7. The display device as described in embodiment 5, wherein the display region (50) and the border region (55, 55’, 55”, 55’”) are contained in separate display panels.
    8. The display device as described in any one of the preceding embodiments, wherein the display region (50) and the border region (55, 55’, 55”, 55’”) comprise a different display panel type.
    9. The display device as described in any one of the preceding embodiments, wherein the border region (55, 55’, 55”, 55’”) is pixilated.
    10. The display device as described in any one of embodiments 1 to 8, wherein the border region (55, 55’, 55”, 55”’) is non-pixilated.
    11. The display device as described in any one of the preceding embodiments, wherein the display region (50) comprises a bi-stable display panel.
    12. The display device as described in any one of the preceding embodiments, wherein the border region (55, 55’, 55”, 55’”) comprises a bi-stable display panel.
    13. The display device as described in embodiment 11 or 12, wherein the bistable display panel is an electrophoretic display panel.
    14. The display device as described in embodiment 13, wherein the electrophoretic display (55, 55’, 55”, 55’”) is of the in-plane-switching type.
    15. The display device as described in embodiment 13, wherein the electrophoretic display (55, 55’, 55”, 55’”) is of the vertical-switching type.
    16. The display device as described in embodiment 11 or 12, wherein the bistable display panel is a bi-stable LCD display panel.
    17. The display device as described in any one of the preceding embodiments, wherein, in operational use of the display device, the color of the border region (55, 55’, 55”, 55’”) is set such that its color is perceived as matching with a background color of the display region (50) when displaying the electronic document page.
    18. The display device as described in embodiment 17, wherein a color difference AE*ab between the border region and the background color is below 10, preferably below 5, more preferably below 1.5, and even more preferably below or equal to 1.0.
    19. The display device as described in any one of the preceding embodiments, wherein the border region (55’, 55”) is provided on two opposing sides of the display region (50).
    20. The display device as described in any one of the preceding embodiments, wherein the border region (55, 55’, 55”, 55’”) fully surrounds the display region (50).
    21. A method of displaying an electronic document page on a display device (100) comprising a display panel comprising a display region (50) and a border region (55, 55’, 55”, 55’”), wherein the border region (55, 55’, 55”, 55’”) abuts at least one side of the display region (50), the method comprising: controlling the display region (50) for displaying the electronic document page, and controlling the border region (55, 55’, 55”, 55’”) such that at least a color of the border region (55, 55’, 55”, 55’”) is set to a desired color to obtain a perceived expansion of the display region (50) into the border region (55, 55’, 55”, 55’”).
    22. The method as described in embodiment 21, further comprising: analyzing content of the electronic document page to control the second driver circuit (45) to obtain the color of the border region (55, 55’, 55”, 55”’).
    23. The method as described in embodiment 22, further comprising: determining a new value of a background color from the content of the electronic document page; storing an actual value of the background color in operational use of the display device; comparing the new value with the actual value, and controlling the respective driver circuit (45) only if the new value is different from the actual value.
    24. A computer program product comprising instructions for causing a processor to perform the method as described in any one of embodiments 21 to 23.
    权利要求:
    Claims (1)
    [1]
    A display device (100) for displaying a page of an electronic document, the display device (100) comprising: a display panel comprising a display area (50) and an edge area (55, 55 ', 55 ", 55"'), the edge region (55, 55 ', 55 ", 55" ") connecting at least to one side of the display region (50), and a control circuit (40, 45) coupled to the display region (50) and the edge region (55 ) and which is configured to control the display area (50) to display the page of the electronic document, and to control the edge area (55, 55 ', 55 ", 55" ") such that at least one color of the edge area (55, 55 ', 55 ", 55" ") is set to a desired color to obtain a perceived expansion of the display area (50) in the edge area (55, 55", 55 ", 55" " ).
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    同族专利:
    公开号 | 公开日
    NL2005385C2|2013-05-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1079584A2|1999-08-20|2001-02-28|Nokia Mobile Phones Ltd.|Cover for an electronic device|
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    EP09171111|2009-09-23|
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    EP09172803|2009-10-12|
    EP09172803|2009-10-12|
    EP09174676|2009-10-30|
    EP09174676|2009-10-30|
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