• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a display tile comprising a display plate and a support plate which are attached to each other through a spacer and an adjustment means placed between the spacer and the support plate, whereby the adjustment means engages an opening in the support plate. The invention further relates to methods for adjusting the distance between the top of an LED on a first surface of an LED plate on a display tile and the rear surface of the display plate support plate.
    公开号:BE1023214B1
    申请号:E2015/0169
    申请日:2015-06-11
    公开日:2016-12-21
    发明作者:Tom Declerck
    申请人:Barco Nv；
    IPC主号:
    专利说明:

    Adjustable display tile for a tiled display. Field of the invention
    The present invention relates to the field of display devices, and in particular to a display tile, a aforementioned including tiled display device, a device for adjusting the geometry of a display tile, a method for adjusting the geometry of a display tile and a mold to facilitate the adjustment method.
    Background
    The evenness of the joint that exists between display tiles in a tiled display is important to avoid visual artifacts. The evenness of the joint is a function of the alignment of the display tile. Techniques and devices for aligning display tiles in tiled displays are known in the art. For example, in US 8,384,616B2 it is described how clips and holders are used to align neighboring display tools with great accuracy.
    These and similar tile alignment techniques assume that the LEDs themselves are well aligned with the tile itself.
    The LEDs are soldered to an LED plate and the LED plate is attached to a support plate. The alignment of the LED plate and the support plate is usually done by means of one or more reference pin (s). The reference pin (s) is / are used to align the LED plate with reference points (eg an angle) of the carrier plate. Unfortunately, there are deviations in the position of the LEDs with respect to the LED plate on which they are soldered and therefore perfect alignment of the LED plate with the support plate by means of reference pins on the LED plate does not mean that the LEDs themselves will be perfectly aligned with the carrier plate. Consequently, even if neighboring LED tiles are perfectly aligned, the relative position of the LEDs on different LED tiles within a tiled display can vary, causing visual artifacts.
    Another problem that is not addressed by the clips and holders used in the prior art is the "z-coordinate" or position of the LED in a direction perpendicular to the plane of the LED plate. Variations in the z- The position of the LED vans tile to tile are the cause of visual artifacts if the direction of the gaze of a spectator does not run along the normal line of the plane of a tiled display.
    There is therefore a need for a solution to adjust the distance between the top of the LEDs on the LED plate and a reference, e.g. the rear face of the support plate.
    It is known in the prior art to adjust the distance between two objects fixed to each other with, for example, screws or bolts, by placing washers between the two objects. The problem with this technique is that varying the distance between two objects is only possible in multiples of the thickness of the washers when commercially available washers are used or that the washers for each LED plate must be treated according to the actual distance between the LED and the LED plate. This is neither practical nor economic.
    Summary of the invention.
    A display tile according to the invention comprises a display plate (1) and a support plate (3) which are attached to each other through a spacer (7) and an adjusting means (6) arranged between the spacer and the support plate. The adjusting means (6) engages an opening (33) in the carrier plate. The adjusting means serves to adjust the distance between the display plate and the support plate, for example between the tops of LEDs on the display plate (referred to as the LED plate) and the support plate.
    It is an advantage of the present invention that adjusting the relative position of LEDs on an LED plate relative to a support plate will improve the alignment of tiles in tiled displays. A further advantage is that the joint between the tiles will be as even as possible, so that the occurrence of erroneous alignments and their accompanying visual artifacts is avoided. These advantages can be achieved either or both without having to process the parts specifically for an LED plate depending on the distance between the LEDs and the LED plate.
    The position of the adjusting means in the opening is changed until the distance between a first surface (61) of the adjusting means and a first surface (31) of the support plate is the difference between a nominal distance (D0) and the sum of the distance between the top of LEDs (2) on the LED plate (1) and a second surface (12) of the LED plate, the length of the spacer (7) and the thickness of the support plate (3). In other words, the distance between a first surface (61) of the adjusting means (6) and a first surface (31) of the support plate (3) is equal to: D0 - (distance between the top of the LEDs and a second surface of the LED plate) - (length of the spacer) - (thickness of the support plate).
    The nominal distance D0 is the desired distance between the top of the LEDs and the second surface (32) or rear of the support plate (3).
    It is an advantage of that aspect of the invention that the position of the tops of the LEDs on the LED plate relative to the support plate, and in particular a second surface or rear surface of the support plate, will be determined with greater accuracy than if the distance of the LED plate and the supporting plate would only be determined by spacers of fixed dimensions arranged between the LED plate and the supporting plate. Embodiments of the invention may permit the realization of tiled displays where the tops of the LEDs across the tiled display are substantially in the same plane, thereby preventing visual artifacts.
    In another aspect of the invention, a side wall (34) of the opening (33) in the support plate may be perpendicular to the second surface (32) of the support plate (3).
    Furthermore, the side wall (63) of the adjusting means (6) can run parallel to the side wall (34) of the opening (33) in the carrier plate.
    It is an advantage of that aspect of the invention that it will be easier to change the position of the adjustment means and attach it to the spacer from the rear of the display tile.
    In a further aspect of the invention, the cross-section of the adjusting means (6) fits into the opening (33). In other words, the distance between the side wall of the opening and the side wall of the adjusting means is less than e.g. 5% or less than e.g. 1% of a lateral dimension of the opening. In particular, the distance between the side wall of the opening and the side wall of the adjusting means may be small enough to cause some friction between the side wall of the opening and the adjusting means without making the movement of the adjusting means in the opening impossible, e.g. a force of e.g. 1 N or between 1 and 10 N or between 10 and 100 N is applied to the adjusting means in a direction perpendicular to the second surface of the support plate.
    It is an advantage of that aspect of the invention that the movement of the adjustment means in the opening will be substantially limited, except in a direction perpendicular to (the second surface of) the support plate, thereby reducing the task of the technician of adjusting the relative position of the LED plate and the support plate becomes simpler. Furthermore, if the distance between the side wall of the adjusting means and the side wall of the opening is limited, it will be easier to release glue without spilling it past the adjusting means before it has hardened, in particular if the vertical on the support plate is parallel to the local acceleration of gravity, ie when the second face of the support plate is "up".
    According to another aspect of the invention, the adjusting means (6) is attached to the support plate by glue applied to the second surface (62) of the adjusting means and the side wall (34) of the opening (33).
    It is an advantage of this aspect of the invention that it is possible to easily fix the distance between the top of the LED and the second surface of the display plate support plate with a minimum of operations.
    In a further aspect of the invention, the cross-section of the adjusting means in the opening varies in a direction perpendicular to the support plate. The distance between the side wall of the adjusting means may, for example, be greater in the upper part of the adjusting means (ie the part of the adjusting means that is closest to the second surface of the support plate when the adjusting means is in the opening) than in the opening lower part of the adjustment means.
    It is an advantage of this aspect of the invention that it will be simpler to apply glue to a portion of the side wall of the adjusting means, thereby improving the attachment of the adjusting means to the support plate.
    In a further aspect of the invention, a fastener 8 secures the adjustment means to the spacer.
    The fastener may pass through an opening in the adjustment means before it engages the spacer.
    The fixing means can for instance be a screw.
    In an alternative aspect of the invention, the fixing means 8 is integral with the setting means. The mounting means may be a threaded extension that extends from the first surface of the adjusting means in a direction perpendicular to that surface of the adjusting means and engages a threaded opening in the spacer. The second surface of the adjusting means may then be a propulsive surface, i.e. it may be slotted, with slot (65) allowing interaction of the second surface (62) with a tool such as a screwdriver.
    It is an advantage of that aspect of the invention that it will further limit the number of operations required to attach the adjusting means to the spacer.
    According to an aspect of the invention, there is provided a method for adjusting the distance between the tops of the LEDs on a display tile and the rear surface of the display plate support plate. It is an advantage of the proposed method that it will compensate for the deviations that influence the positions of the LEDs, the thickness of the LED plate, the length of the spacers and the thickness of the support plate.
    The LED plate and the support plate can be positioned parallel to each other (with the first surface of the support plate facing the second surface of the LED plate), the distance between the tops of the LEDs and the second surface or rear surface of the support plate is taken equal to the desired distance. In other words, the tops of the LEDs on the LED plate are arranged in a first reference plane; the second surface of the carrier plate is arranged in a second reference plane extending parallel to the first plane, the second surface of the carrier plate pointing away from the LED plate; wherein the distance between the first reference plane and the second reference plane is the desired or nominal distance between the tops of the LEDs and the second surface of the support plate. The opening (s) in the carrier plate are aligned with the spacer (s) on the LED plate.
    The adjusting means is moved into the opening in the carrier plate until a first surface of the adjusting means touches the spacer.
    The adjusting means and the spacer are attached to each other. Glue is applied in the opening on the side wall of the opening and on a second surface of the adjusting means. The glue is then allowed to cure to attach the adjusting means to the support plate at the position where the adjusting means compensates for the deviations which influence the position of the LEDs with respect to the support plate in a direction perpendicular to the support plate.
    Fixing the distance between the top of the LEDs and the second surface of the support plate can be facilitated by using a mold made with better tolerances than the LED plate and the support plate.
    The mold has a first surface or reference surface. Side walls extend from the first surface of the mold. If the deviation of the thickness of the support plate is sufficiently small to be ignored, the top of the side walls serves as a support or stop for the support plate which is parallel to the reference plane. The LED plate is positioned in such a way that the LEDs are in contact with the reference surface.
    The height of the side walls can be selected such that, when the side walls are in contact with the support plate, the distance between the second surface of the support plate (away from the reference plane) and the reference plane is equal to the nominal distance or desired distance between the tops of the LEDs on the LED plate and the second surface of the support plate. The position of the adjusting means in the opening of the support plate is changed until a first surface of the adjusting means touches the spacer. The adjusting means and the spacer are then attached. Glue is applied in the opening to attach the adjustment means to the support plate and to fix its position in the opening, thereby ensuring that the distance between the second surface of the support plate and the tops of the LEDs is equal to the nominal or desired distance when the carrier plate and LED plate are taken out of the mold.
    If the deviations in the thickness of the support plate cannot be ignored, the side walls of the mold are preferably provided with a step. The distance between the top of the outer part to which the side wall extends and the reference plane (in a direction perpendicular to the reference plane) is equal to the nominal or desired distance. The distance between the top of the innermost part of the side wall and the reference surface is smaller than the nominal or desired distance minus the nominal thickness of the support plate.
    A flexible material (such as, for example, elastomer, rubber, such as silicone rubber, or a foam, such as polyurethane foam) is applied between the top of most inner part of the side wall and the support plate. The thickness of the flexible material is chosen such that pressure must be exerted on the support plate to make the second surface of the support plate flat or coplanar with the top of the outermost part of the side wall of the mold. When the second surface of the support plate is smooth with the top of the outer part of the side wall of the mold, the distance between the tops of the LED and the second surface of the support plate is the nominal or desired distance. The position of the adjusting means in the opening of the support plate is changed until a first surface of the adjusting means touches the spacer. The adjusting means and the spacer are then attached. Adhesive is applied in the opening to secure the adjustment means to the support plate and to fix its position in the opening, thereby ensuring that the distance between the second surface of the support plate and the tops of the LEDs is equal to the nominal or desired distance when the carrier plate and LED plate are taken out of the mold.
    In other aspects, the present invention relates to a display device, a tiled display device comprising display lifts, a device for adjusting the geometry of a display tile, to a mold for the method of adjusting a relative position of the display plate relative to the support plate.
    Brief description of the Figures.
    Figure 1 shows a perspective view of a display tile according to an embodiment of the invention.
    Figure 2 shows a perspective view of the carrier plate and the adjusting means according to an embodiment of the invention.
    Figure 3 shows a cut-away view of a display tile according to an embodiment of the invention.
    Figure 4 shows a cross-section of a display tile according to an embodiment of the invention through a plane perpendicular to the display tile if the deviations are negligible.
    Figure 5a shows a cross-section of a display tile according to an embodiment of the invention when the top of the LED is at a greater distance than nominal from the first surface 11 of LED plate 1.
    Figure 5b shows a cross-section of a display tile if the top of the LED is at a greater distance than nominal from the first surface 11 of LED plate 1 and which is not compensated.
    Figure 6a shows a cross-section of a display tile according to an embodiment of the invention if the top of the LED is at a smaller distance than nominal from the first surface 11 of LED plate 1.
    Figure 6b shows a cross-section of a display tile if the top of the LED is at a smaller distance than nominal from the first surface 11 of LED plate 1 and which is not compensated.
    Figure 7a shows examples of geometries for the adjusting means 6 and the opening 33 according to an embodiment of the invention.
    Figures 7b and 7c show an example of adjusting means 6 wherein the cross sections in a first part and a second part of the adjusting means are different according to an embodiment of the invention.
    Figures 8a, 8b and 8c show a cross-section of a display tile according to embodiments of the invention in which the adjusting means 6 and 6b compensate for an uneven LED plate, spacers 7 and 7b of different lengths and an uneven bearing plate, respectively.
    Figure 9 shows a perspective view and a cross-sectional view of an example of an adjustment means with an integral fastening means according to an embodiment of the invention.
    Figure 10 shows an example of a method for setting up a display tile according to an embodiment of the invention.
    Description of embodiments.
    The present invention will be described with respect to certain embodiments and with regard to certain drawings, but the invention is not limited thereto, but only by the claims. The described drawings are only schematic and not restrictive. In the drawings, the dimensions of some elements may be exaggerated and not drawn to scale for illustration. The dimensions and the relative dimensions do not correspond to actual reductions to practice of the invention.
    Although the description will be made for an LED display, the invention also applies to display tiling where an imaging element (e.g., a liquid crystal panel) or a set of imaging elements (e.g., OLED) must be aligned on a display plate with a support plate. In the following, any reference to LED (light-emitting diode) can be replaced by OLED (organic light-emitting diode). In the following, a display plate will be described with reference to an LED display, and therefore the display plate will be referred to as an LED plate, by way of example. However, the display plate is not limited to an LED plate, but also includes other types of plates, such as display plates with OLED emitters.
    An LED plate 1 consists of a printed circuit board (PCB) with electrically conductive tracks, for example copper tracks that connects light-emitting diodes 2 (LED) with various electronic components (such as, for example, current control circuits, power contacts, etc.). As can be seen in Figure 1, the LED plate 1 has a first face 11 and a second face 12, which are parallel. The LEDs are mounted on the first face 11 of the LED plate. The deviation of the vertical position of the LED 2 from the first plane 11 is the same for all LEDs mounted on the same LED plate 1. The LEDs can be surface mounted members or piercing members.
    The LED plate 1 is attached to a support plate 3. The support plate 3 will be the mechanical interface between the LED plate and a support structure 4 of a tiled display 5.
    The carrier plate 3 has a first face 31 and a second face 32. The first face 31 and the second face 32 are substantially parallel to each other. The distance between the first face 31 and the second face 32 is the thickness T1 of the support plate 3. The first face 31 (the front or the front face of the support plate 3) will be closest to the LED plate 1 as the LED plate 1 and carrier plate 3 are assembled together. The second face 32 (the rear or rear face of the support plate 3) will be closest to the support structure 4 when the LED plate 1 and the associated support plate 3 are attached to the support structure 4.
    The support plate 3 has at least one opening 33 extending from the first surface 31 to the second surface 32. The opening 33 has side walls 34 which are preferably perpendicular to the first surface 31 and the second surface 32 of the support plate 3. The intersection of the side walls 34 and the first face 31 is a curve C1. C1 is preferably a circle, but other curves, such as arcuate, are possible.
    A setting means 6 has a first face 61 and a second face 62. The first face 61 and the second face 62 are preferably substantially parallel to each other. The adjusting means 6 has a third face 63 which runs from the first face 61 to the second face 62. The third face is preferably perpendicular to the first face 61 and the second face 62. The adjusting means 6 is located in the opening 33 in the support plate 3, the first face and second face 61 and 62 of adjusting means 6 being parallel to the first and second face 31 and 32 of the support plate 3. For example, if the aperture 33 is cylindrical and the curve C1 is a circle with radius R1, as in Figure 2, the cross section of the setting means 6 is preferably a circle C2 with a radius R2 that is equal to or slightly smaller than the radius R1. Other cross-sections for the adjusting means 6 are possible and some examples thereof are shown in Figure 7a where the curve C1 is a curve or a square. In some cases it may be advantageous if the thickness T2 of the adjusting means 6 is smaller than the thickness T1 of the support plate 3 (in particular at the height of the opening 33).
    The cross-section of the adjusting means 6 through a plane parallel to the first surface 61 can vary between the first surface 61 and the second surface 62. In particular, the cross-section of adjusting means 6 near the second surface can become smaller. In particular, as shown in Figures 7b and 7c, the cross-sectional area may comprise an area that is equal to that of the first surface 61 in a first part of the adjusting means close to the first surface 61 and may comprise a second area smaller is then the area of surface 61 in a second part of the adjusting means close to surface 62. If the aperture 33 defines a circle in the second surface 32 of the support plate 3, the adjusting means may be, for example, the combination of two circular straight cylinders: first cylinder of radius R3 (not shown - slightly smaller than R1) in a first part on a side bounded by the first surface 61 and a second cylinder of radius R2 in a second part on a side bounded by the second surface 62.
    The space 35 between the side wall 34 of the opening 3 and the side wall 63 of the adjusting means 6 along the second part of the adjusting means 6 is therefore larger and it is easier to apply glue into the space 35 around the adjusting means on the support plate 3. to confirm. At the same time, the first part of the adjusting means will prevent the glue from falling on the spacer and the LED plate. It is advantageous to have a space 35 between them to apply glue to both a part of the side wall 34 of the opening 33 and a part of the side wall 63 of the adjusting means 6. After all, the attachment of the adjusting means 6 to the support plate 3 is improved by increasing the glued surface.
    At least one spacer 7 is attached to the second face 12 of the LED plate 1. The position of the spacer 7 corresponds to the position of the opening 33 in the support plate 3 when the LED plate 1 is parallel to the support plate 3 positioned, the second face 12 of the LED plate 1 facing the first face 31 of the support plate 3. The length of spacer 7 on different LED plates is less variable than the distance D1 between the top of LED 2 and the first surface 11 of LED plate 1 on different LED plates. The spacer 7 is usually cylindrical and is of the female type, i.e. it has an opening that can receive a fastening element 8.
    At least one mounting element 8 is used to attach the support plate 3 to the LED plate 1. The fixing element 8 is, for example, a screw that fits into the opening 71 of the spacer 7.
    As can be seen in Figure 3, the fastening element 8 passes through an opening 64 of adjusting means 6 from the second surface 62 to the first surface 61, preferably perpendicular to the surfaces 61 and 62. The opening 64 preferably has no screw thread and the fastening element 8 can move through it without too much resistance.
    A head 81 of fastening element will stop the progress of the fastening element 8 by adjusting means 6. For example, if the fastening element 8 is a screw, the head of the screw will press against the second face 62 of the adjusting means 6 and stop the progress of the screw 8 even if a force is exerted on the screw.
    As the screw 8 is screwed into the female spacer 7, the screw 8 comes closer to the second face 12 of LED plate 1. The screw 8 has such a length that it can be screwed into the spacer 7 until the first face 61 of adjusting means 6 is in contact with spacer 7. For example, the length L1 of the screw 8 is less than the thickness T2 of the adjusting means 6 and the length L2 of the female opening of the spacer 7 together (L1 <T2 + L2). If the screw 8 cannot go deeper into the spacer 7, the adjusting means 6 is attached to the support plate 3. This can be achieved by applying glue 9 in the opening 33, preferably from the second surface 32, the glue 9 touching at least the second surface 62 of the adjusting means 6 and the side wall 34 of the opening 33 in the carrier plate 3. Depending on the cross-section of adjusting means 6, the glue can penetrate deeper into the opening 33 and touch the side walls 63 of adjusting means 6.
    Alternatively, the opening 64 of adjusting means 6 can be threaded and the spacer 7 can have a male threaded part 72 instead of a threaded opening 71. Adjusting means 6 is screwed onto the male threaded part 72 until it cannot slide further into the opening 33. Glue 9 is then applied in the opening 33 on the side wall 34 and the second face 62 of adjusting means 6 to attach the support plate 3 and the adjusting means 6 to each other.
    The glue 9 is selected as a function of the material of the support plate 3 and the adjusting means 6. The glue 9 is preferably a fast-setting glue.
    Preferably, more than one spacer 7 is evenly distributed over the second face 12 of the LED plate 1. For each spacer 7b there will be a corresponding opening 33b in the support plate 3 and a corresponding adjusting means 6b. The position in an opening 33b of the adjusting means 6b which is associated with a specific spacer 7b can be the same for all openings and their associated adjusting means. This will be the case if the thickness of the LED plate 1, the thickness of the support plate 3 is constant over the plate and the length of the spacers 7, 7b ... is the same for spacer 7, 7b ...
    If the thickness of the LED plate 1 and / or the supporting plate 3 is not constant over the plate and / or the length of the spacers is not the same for the spacers 7, 7b ... due to deviations, the position of adjusting means 6 , 6b. in their corresponding opening 33, 33b. be different. This is shown in Figure 8a (thickness of the LED plate not constant over the plate), Figure 8b (spacers 7 and 7b have different lengths) and Figure 8c (thickness of the support plate not constant over the plate). The adjusting means 6 can therefore compensate for the deviations to which the various parts of the display tile are subject.
    The area of opening 33 in the carrier plate 3 is preferably larger than the cross-sectional area of the spacer 7 through a plane parallel to the first and second surfaces of the carrier plate. This serves to ensure that the spacer 7 can pass through the opening 33 if this is necessary due to the deviation in the position of the LED 2 relative to the first surface 11 of the LED plate 1.
    As an alternative to a screw, the fastening means 8 can be an integral part of the adjusting means 6. As shown in Figure 9, the fastening means 8 may be a threaded extension extending from the first surface 61 of the adjusting means 6 in a direction perpendicular to that surface of the adjusting means 6 to mesh with a threaded opening in the spacer 7 to grab. The second surface 62 of the adjusting means may then be a propelling surface, i.e. it may be provided with a slot, a slot 65 in the second surface 62 allowing interaction of the second surface 62 with a tool such as a screwdriver.
    Alignment of the LEDs 2 with support plate 3 can be facilitated by the use of a jig 10.
    The mold has at least a first "lower" part 10A. The lower part 10A has a first surface 101. The first surface 101 has an area large enough to accommodate all the LEDs on the LED plate 1.
    The mold can have a second "upper" part 10B. The upper part 10B will help to position the support plate relative to the LED plate 1.
    The lower part 10A has side walls 102 which extend above its first surface 101. The rim of the first surface 31 of the support plate 3 can touch a surface 103 of the side walls 102. The distance between the first surface 101 of the lower part 10A and the second surface 32 of the support plate 3 corresponds to the desired distance D0 between the tops of the LED 2 on the LED plate 1 and the second surface 32 of the support plate 3 In this first embodiment of the mold 10, the distance between the surface 103 and the first surface 101 is equal to the nominal distance D0 minus the thickness of the support plate 3.
    In general, when the deviation in the thickness of the support plate is not negligible, a second embodiment of the mold 10 is used, wherein the side walls 102 have a second surface 104 along an outer edge of the side walls 102. The second surface 104 is parallel to the first surface 101 (the reference surface). The distance between the second surface 104 and the first surface 101 is equal to the nominal distance D0 which is desired between the top of the LEDs 2 and the second surface 32 of the support plate 3. In this case the distance between the surface 103 and the first surface 101 smaller than the nominal distance DO minus the nominal thickness of the support plate 3.
    An elastic material 105, such as, for example, elastomer or rubber, covers the surface 103 of the side walls. The thickness of the elastic material 105 is determined as a function of its elasticity, the distance between the first surface 103 and the second surface 104 and the nominal thickness of the support plate 3. Once placed in the mold, the support plate 3 is in contact with the elastic material 105 and a force is applied to one or more points of the second surface 32 of the support plate 3 to bring the second surface 32 of the support plate to the same level as the second surface 104 of the side wall 102. This is initially evaluated on the circumference of the support plate 3. Alternatively, an upper part 10B of the mold 10 is attached to the lower part 10A of the mold by means of e.g. screws. Pressure is applied to the support plate either directly through the upper part or by means of screws that fit into threaded openings in the upper part. Once the second surface 32 of the support plate 3 is flush with the second surface 104 of the side walls, the distance between the top of the LEDs 2 (in contact with the reference plane 101) and the second surface 32 of the support plate 3 is equal to the nominal or desired distance. Openings in the upper part 10B of the mold give access to the openings 33, 33b ... in the support plate 3.
    The method of assembling the LED plate 1 to the support plate 3 to realize the desired distance between the top of the LED 2 and the second surface 32 of the support plate 3 will now be described in more detail. An example of the method is shown in Figure 10.
    In a first step S10, the tops of LED: s 2 are positioned on the LED plate 1 in a first reference plane 101.
    With the help of the mold 10 this is done by positioning the LED plate 1 on the lower part 10A of the mold 10 with the tops of LEDs 2 in contact with the first surface 101.
    In a second step S20, the openings (33, 33b ...) in the carrier plate are aligned with the spacers (7, 7b ...).
    In a third step S30, the second surface 32 of the support plate 3 is positioned in a second reference surface 104; wherein the first surface 31 of the support plate 3 faces the second surface 12 of the LED plate. The first and second reference planes are parallel and the distance between the first and second reference planes is equal to a nominal distance DO.
    When applying the first embodiment of the mold, the positioning of the second surface 32 of the carrier plate in the second reference plane is performed in step S20 by bringing the first surface 31 of the carrier plate into contact with the surface 103 of the side wall 102.
    When the second embodiment of the mold 10 is used, the first surface 31 of the support plate 3 is brought into contact with the elastic material 105 and pressure is exerted on the support plate until the second surface 32 of the support plate in the second reference plane corresponds to the second surface 104 of the side wall 102 of the mold.
    Steps 20 and 30 can be exchanged. For example, if only part 10A is used, the support plate can first be positioned on the surface 103 so that it is at the correct distance and then slid into the plane of surface 103 around openings 33, 33b ... with the corresponding spacers 7, 7b ... to be aligned.
    In a fourth step S40, an adjusting means 6 is positioned in the opening 33 and moved in the opening in a direction perpendicular to the second surface 32 until a first surface 61 of the adjusting means touches a spacer 7. This operation is repeated for each spacer 7 that is accessible through an opening 33 in the carrier plate.
    In a fifth step S50, the adjusting means 6 is attached to the spacer 7. This operation is repeated for each spacer 7 that is accessible through an opening 33 in the carrier plate.
    When a screw 8 is used to attach the adjusting means 6 to the spacer 7, the aperture 71 in the spacer 7 and the aperture 64 in the adjusting means 6 are aligned. Screw 8 engages opening 64 and is screwed into threaded opening 71 of spacer 7 until head 81 of screw 8 touches second surface 62 of adjusting means 6 and press adjusting means 6 presses against spacer 7.
    In a sixth step S60, the adjusting means 6 is attached to the support plate 3. This can be done by placing glue 9 in the opening 33 of the carrier plate. The operation is repeated for each spacer on the LED plate 1 which is directed to an opening in the support plate 3.
    The distance between the tops of the LEDs and the second surface of the support plate is now fixed and equal to D0.
    Alternatively, step S50 and step S60 can be exchanged. Particularly when the fastener 8 is an integral part of the adjusting means, as is the case in Figure 9, the first surface 61 of the adjusting means 6 will come into contact with the spacer 7 after the fastening means 8 has fully engaged in the threaded provided opening of spacer 7. In other words, the first surface 61 will come into contact with the spacer 7 as a result of attaching the adjusting means 6 to the spacer 7.
    If glue is used to attach the adjusting means to the support plate and if a screw passing through aperture 64 of the adjusting means is used to attach the adjusting means and the spacer, it may be advantageous to attach the adjusting means and the spacer before the glue is applied applied. After all, in that case the glue 9 will not end up in the opening 64 since the opening 64 is then blocked by the screw 8.
    Figures 4 to 6 show three typical situations and the resulting position of the adjusting means 6 for attaching LED plate 1 to support plate 3.
    In Figure 4, the tops of the LEDs 2 are at a nominal distance from the first surface 11 of LED plate 1.
    In Figure 5a, the tops of the LEDs 2 are further away from the first surface 11 of LED plate 1 than nominal (nominal distance between the LED body and the LED plate is shown as ND in Figures 4 to 6b).
    If nothing were done about it (as in Figure 5b), where the support plate and the LED plate are attached to each other without the intervention of adjusting means 6, attaching the LED plate 1 to the supporting plate 3 without the adjusting means 6 would result in a distance D1 between the rear side of the support plate 3 and the tops of LEDs 2 that is larger than the desired distance D0.
    The difference between D1 and DO can be compensated by the adjusting means 6 as follows: the spacer 7 can enter the opening 33; and the adjusting means 6 which slides into the opening 33 follows the spacer 7, whereby the difference between the actual and nominal position of the LED 2 above the first surface 12 of the LED plate is compensated. The position of adjusting means 6 is fixed with glue and the distance between the top side of the LED 2 and the rear side 32 of the support plate 3 is the desired DO.
    In Figure 6a, the tops of the LEDs 2 are closer to the first surface 11 of LED plate 1 than a nominal distance.
    If nothing were done about it, as in Figure 6b, attaching the LED plate 1 to the support plate 3 without the adjustment means 6 would result in a distance D1 between the rear of the support plate 3 and the top of LED 2 being smaller is then the desired distance D0.
    The difference between D1 and D0 can be compensated by the adjusting means 6 as follows: the spacer 7 does not cross the surface of the first surface 31 of the support plate 3 and the adjusting means 6 partially comes out of opening 33 (the first surface 61 is located below the first surface 31) and stops when it touches the spacer 7 that compensates for the difference between the actual and nominal position of the LED 2 above the first surface 12 of the LED plate. The position of adjusting means 6 is fixed with glue and the distance between the top of the LED 2 and the rear of the support plate 3 is the desired D0.
    The LED plate 1 can become bulged during production or handling. To compensate for this, pressure can be applied to different points of the second surface 12 of LED plate 1 when it is in a mold 10.
    The upper part 10B of the mold 10 is attached to the lower part 10A, e.g. by means of screws. At least one threaded component 11, e.g. screws with a blunt end, can be screwed through the threaded openings in the upper part 10B and pass through openings in the support plate 3. The blunt ends 110 of the threaded parts 11 pull a warped LED plate straight through at least one point of the LED plate 1 and preferably 4 non-collinear points of the second surface 12 of the LED plate 1 to exercise.
    权利要求:
    Claims (17)
    [1]
    Conclusions.
    A display tile comprising a display plate (1) and a support plate (3), LEDs (2) mounted on a first side of the display plate and wherein the support plate is intended to be mounted on a frame, the display plate (1) and the support plate (3) are attached to each other through a spacer (7) and an adjustment means (6) placed between the spacer and the support plate, the adjustment means engaging an opening (33) in the support plate, the adjustment means compensating of the tolerances that influence the position of the LEDs with respect to the support plate in a direction perpendicular to the support plate, whereby the compensation by the position of the adjusting means in their corresponding aperture (33) is obtained.
    [2]
    A display tile according to claim 1, wherein the display plate (1) has LEDs (2) and the adjusting means is intended for adjusting a relative position of the tops of the LEDs (2) relative to the support plate (3).
    [3]
    A display tile according to claim 1 or 2, wherein the display plate (1) has LEDs (2) and the distance between a first surface (61) of the adjusting means and a first surface (31) of the support plate is set to the difference between a nominal distance (D0) and the sum of the distance between the tops of LEDs (2) on the display plate (1) and a second surface (12) of the display plate, the length of the spacer (7) and the thickness of the support plate (3), the nominal distance (D0) being the distance between the top of the LEDs and a second surface (32) or rear of the support plate (3).
    [4]
    A display tile according to any one of the preceding claims, wherein a side wall (34) of the opening (33) in the support plate (3) is perpendicular to the second surface (32) of the support plate (3).
    [5]
    A display tile according to any one of the preceding claims, wherein a side wall (63) of the adjusting means (6) is parallel to the side wall (34) of the opening (33) in the carrier plate.
    [6]
    A display tile according to any one of the preceding claims, wherein the thickness of the adjusting means (6) is smaller than the thickness of the carrier plate (3).
    [7]
    A display tile according to any one of the preceding claims, wherein the cross-section of the adjusting means (6) fits into the opening (33).
    [8]
    A display tile according to any one of the preceding claims, wherein the adjusting means (6) is attached to the support plate by glue (9) which is located on a second surface (62) and / or a side wall (63) of the adjusting means (6) and a side wall (34) of the opening (33) extends.
    [9]
    A display tile according to any one of the preceding claims, wherein the cross section of the adjusting means has a first region in a first part of the adjusting means and a second region in a second part of the adjusting means.
    [10]
    The display tile of claim 9, wherein the adjusting means has a first portion that is a circular straight cylinder with a first radius, and a second portion that is a circular straight cylinder with a second radius that is smaller than the first radius.
    [11]
    A display tile according to any one of the preceding claims, wherein a fastening means (8) fixes the adjusting means (6) to the spacer (7).
    [12]
    The display tile of claim 11, wherein the fastener (8) passes through an opening (64) in the adjustment means (6).
    [13]
    The display tile of claim 12, wherein the fastener (8) is a screw.
    [14]
    A display tile according to any of claims 1 to 11, wherein a threaded extension extends from a first surface (61) of the adjusting means (6) and the spacer (7) has a corresponding threaded opening around the threaded extension.
    [15]
    The display tile of claim 14, wherein the second surface (62) of the adjusting means is a propelling surface.
    [16]
    A method of adjusting the distance between the tops of the LEDs (2) on a first surface of a display plate on a display tile and the rear surface (32) of the supporting plate (3) of the display tile, the method comprising the following steps comprises: - Positioning the tops of the LEDs (2) on a display plate (1) in a first reference plane (101), - Aligning openings (33, 33b ...) in the support plate with the display plate (1) distributed over spacers (7, 7b.), - Positioning a second surface of a support plate (3) in a second reference surface (104); wherein a first surface (11) of the carrier plate faces a second surface of the display plate (1); wherein the first and second reference planes are parallel and the distance between the first and second reference planes is equal to a desired nominal distance (D0), - Moving adjusting means (6, 6b.) in the openings (33, 33b) to a first surface (61, 61b.) Of each adjusting means touches a spacer (7, 7b), - Attaching each adjusting means to its corresponding spacer, - Attaching the adjusting means (6, 6b) to the support plate (3).
    [17]
    A tilted display device comprising a plurality of display hoists fixed to a frame according to any of claims 1 to 15.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB1410637.1|2014-06-13|
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