OLED module and OLED splicing screen
By designing a bent section along the edge of the OLED module substrate and leading out the driving electrode layer leads, combined with rigid components and a mask, the splicing seam problem of OLED splicing screens was solved, achieving seamless splicing and video conferencing functions.
Patent Information
- Application Number
- CN202420550829.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-18
AI Technical Summary
Existing OLED splicing screens have the problem that the splicing seams cannot be truly seamless, especially the gaps caused by the leads of the driving electrode layer are difficult to eliminate.
The upper and lower substrates of the OLED module are designed with bent sections along their edges, and are spliced together through these bent sections. The leads of the driving electrode layer are led out through the packaging port. Combined with the use of rigid components and a mask, the splicing seam is reduced.
It achieves seamless splicing of OLED video walls, enhancing the audience's viewing experience, and uses cameras to acquire video image information for real-time adjustments in video conferencing.
Smart Images
Figure CN222322117U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of display screens, and in particular relates to an OLED module and an OLED spliced screen. Background Art
[0002] OLED (Organic Light-Emitting Diode) is a current-type organic light-emitting device that emits light through the injection and recombination of carriers. It has a low driving voltage and is thinner and lighter than LCD, has high brightness, low power consumption, fast response, high clarity, good flexibility, and high luminous efficiency, which can meet consumers' new demands for display technology. At present, OLED can be applied not only to small-sized display screens such as mobile phones, but also to large-sized display screens such as televisions and video conferencing systems. There is also a trend of being applied to movie screens.
[0003] The current common OLED display manufacturing technology is mainly to directly manufacture OLED light-emitting pixel units on a TFT driver substrate. However, it is very difficult and costly to manufacture large-area OLED light-emitting panels. As the size of the OLED display increases, the manufacturing cost will increase exponentially and the yield rate will also decrease. Therefore, splicing is usually used to achieve large-size OLED screens.
[0004] In OLED splicing screens, factors such as the size of the splicing seam and the spacing between the OLED light-emitting pixel units after splicing will directly affect the audience's viewing experience. However, due to the presence of the lead wires of the driving electrode layer at the edge of the OLED display, it is still impossible to truly achieve "seamless" splicing. Utility Model Content
[0005] The technical problem to be solved by the utility model is how to reduce the splicing seam of the OLED splicing screen.
[0006] To solve the above technical problems, the utility model is implemented as follows: an OLED module comprises an upper substrate and a lower substrate; the upper substrate comprises a first central region, at least one edge of the first central region comprises a first bending section, and the first bending section extends from the edge of the first central region in a direction perpendicular to the first central region; the lower substrate comprises a second central region, at least one edge of the second central region comprises a second bending section, and the second bending section extends from the edge of the second central region in a direction perpendicular to the second central region; at each edge, an end of the first bending section and an end of the second bending section are sealed together and serve as a splicing portion for splicing with other OLED modules, and the splicing portion has a packaging port; an integrated driving electrode layer is attached to the second central region and the second bending section on one side facing the upper substrate, an OLED pixel unit is arranged on the driving electrode layer on the second central region, and an OLED pixel unit is not arranged on the driving electrode layer on the second bending section; the electrode leads of the driving electrode layer are led out through the packaging port.
[0007] Furthermore, the OLED pixel unit includes an OLED pixel unit adjacent to an edge and an OLED pixel unit not adjacent to an edge, the OLED pixel unit adjacent to an edge is adjacent to the second bending section, and the OLED pixel unit not adjacent to an edge is located between the OLED pixel units adjacent to the edges; the distance between the OLED pixel unit adjacent to an edge and the outermost side of the splicing portion is L1, and the distance between the OLED pixel unit not adjacent to an edge and the OLED pixel units on both sides is L2, and L2 is twice L1.
[0008] Furthermore, a strip-shaped rigid member is attached to a side of the edge of the second middle region facing away from the upper substrate.
[0009] Furthermore, a strip-shaped rigid member is attached to a side of the second bending section facing away from the upper substrate.
[0010] Furthermore, a side of the edge of the second middle region facing away from the upper substrate forms a right angle with the second bending section, and a right-angled rigid member is attached to the right angle.
[0011] Furthermore, the thickness of other parts of the OLED module except the first bending section and the second bending section is not greater than 0.3 mm, and the lengths of the first bending section and the second bending section are not less than 2 mm.
[0012] Furthermore, the OLED module also includes a mask, which includes interconnected grids and grid units surrounded by the grids, each of the OLED pixel units is located in the grid units, and each grid unit is evenly distributed as a whole; the grids include a first grid and a second grid, and the width of the first grid is twice the width of the second grid; the position between adjacent OLED pixel units is covered with the first grid, and the splicing part of the OLED module is covered with the second grid.
[0013] The utility model also provides an OLED splicing screen, comprising a plurality of OLED modules as described above, wherein adjacent OLED modules are spliced via the splicing portion.
[0014] Furthermore, the OLED splicing screen includes a mask, which includes interconnected blocks and grid units surrounded by the blocks; the blocks are covered at the positions of the splicing seams between adjacent OLED modules, and the OLED pixel units are located in the grid units.
[0015] Furthermore, the positions between adjacent OLED pixel units are also covered with the grids, and the grid units are evenly distributed as a whole.
[0016] Furthermore, at least one OLED module is provided with a light-transmitting area, and a camera is fixed on the backlight side of the OLED module opposite to the light-transmitting area, and the camera is used to capture a video image of a user located on the light-emitting side through the light-transmitting area.
[0017] The edge of the OLED module provided by the utility model extends in the vertical direction with a bent section, which can be spliced together with other OLED modules. In addition, since the lead of the driving electrode layer is led out through the packaging port of the bent section, there is no need to lead out the driving line and set up the driving circuit at the position of the splicing seam of adjacent OLED modules, which can further reduce the splicing seam and facilitate seamless splicing. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a longitudinal cross-sectional structural diagram of an OLED module provided by the first embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the distance relationship between various OLED pixel units provided in the first embodiment of the utility model;
[0020] Figure 3A , Figure 3B , Figure 3C They are schematic diagrams of adding a rigid member at the location of the splicing portion of the OLED module provided by the first embodiment of the utility model;
[0021] Figure 4 It is a longitudinal cross-sectional structural diagram of a mask provided on an OLED module provided by the first embodiment of the utility model;
[0022] Figure 5 It is a longitudinal sectional structural diagram of an OLED splicing screen provided by the second embodiment of the utility model;
[0023] Fig. 6A and Figure 6B They are respectively a longitudinal section structure diagram and a top view of an OLED splicing screen provided with a mask barrier only at the position of the splicing seam provided by the second embodiment of the utility model;
[0024] Fig. 7A and Figure 7B They are respectively a longitudinal section structure diagram and a top view of an OLED splicing screen provided with mask barriers at the position of the splicing seam and the position between the OLED pixel units according to the second embodiment of the present invention;
[0025] Figure 8 It is a longitudinal sectional structural diagram of an OLED spliced screen including a camera provided in the second embodiment of the utility model. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0027] Reference Figure 1 The first embodiment of the utility model provides an OLED module, including an upper substrate 1 and a lower substrate 2 . The upper substrate 1 includes a first middle region 11 , and the lower substrate 2 includes a second middle region 21 .
[0028] At least one edge of the first central region 11 has a first bending section 12, and the first bending section 12 extends from the edge of the first central region 11 in a direction perpendicular to the first central region 11. Similarly, at least one edge of the second central region 21 has a second bending section 22, and the second bending section 22 extends from the edge of the second central region 21 in a direction perpendicular to the second central region 21.
[0029] The so-called “middle region (i.e., the first middle region 11 and the second middle region 21)” is relative to the “bending segments (i.e., the first bending segment 12 and the second bending segment 22)”. Taking the upper substrate 1 as an example, the first bending segment 12 is located at the edge of the first middle region 11, so the first middle region 11 is naturally located in the middle of the upper substrate 1 relative to the first bending segment 12. The number of first bending segments 11 is not limited and can be determined according to the shape of the OLED splicing screen to be spliced and the position of the OLED module in the OLED splicing screen. For example, the first middle region 11 is usually rectangular. For an OLED module that is spliced in only one dimension, it can be as follows Figure 1 As shown, there are second bends 22 on two opposite edges. For modules that need to be spliced in two-dimensional directions, all four edges need to have second bends 22. In addition, for OLED modules that are spliced only in one-dimensional directions and are located at the end of the entire OLED splicing screen, only one edge may have a second bend 22 for splicing, and the other edges that do not need to be spliced are not bent. For modules that need to be spliced in two-dimensional directions and are located at corners, only two adjacent edges may have second bends 22 for splicing, and the other edges that do not need to be spliced are not bent; for modules that need to be spliced in two-dimensional directions and are located at the ends rather than the corners, only three adjacent edges may have second bends 22 for splicing, and the remaining edge that does not need to be spliced is not bent.
[0030] Similarly, the second middle region 21 and the second bending section 22 on the lower substrate 2 are also the same, and will not be described in detail.
[0031] At each edge with a bending section, the end of the first bending section 12 and the end of the second bending section 22 are sealed together and serve as a splicing portion for splicing with other OLED modules. The splicing portion has a packaging port 3.
[0032] An integrated driving electrode layer 4 is attached to the second middle region 21 and the second bending section 22 on the side facing the upper substrate 1; an OLED pixel unit 5 is arranged on the driving electrode layer 4 on the second middle region 21, while no OLED pixel unit is arranged on the driving electrode layer 4 on the second bending section 22; the electrode lead 41 of the driving electrode layer 4 is led out through the packaging port 3.
[0033] In terms of material selection, the upper substrate 1 and the lower substrate 2 can be made of PET (polyethylene terephthalate) material, which has a thickness of micrometer level and is easy to bend. The driving electrode layer 4 can be made of one or more of ITO, AZO, nano-Ag film, and graphene. The manufacturing process can use existing evaporation methods or printing methods. The thickness of the entire OLED module can be 0.2mm, and the length of the first bending section 12 and the second bending section 22 is 3mm, wherein the above thickness refers to the vertical distance between the upper substrate 1 and the lower substrate 2.
[0034] It can be seen that the edge of the OLED module provided in the first embodiment of the utility model extends in the vertical direction with a bending section, through which it can be spliced with other OLED modules, and because the lead of the driving electrode layer 4 is led out through the packaging port 3 of the bending section, the position of the splicing seam of adjacent OLED modules does not need to lead out the driving line and set up the driving circuit, which can further reduce the splicing seam and facilitate seamless splicing.
[0035] Continue reading Figure 1 The OLED pixel unit 5 includes an adjacent edge OLED pixel unit 51 and a non-adjacent edge OLED pixel unit 52. The adjacent edge OLED pixel unit 51 is adjacent to the second bending section 22, and the non-adjacent edge OLED pixel unit 52 is located between the adjacent edge OLED pixel units 51.
[0036] like Figure 2 As shown, the distance between the OLED pixel unit 51 adjacent to the edge and the outermost side of the splicing part is L1, and the distance between the OLED pixel unit 52 not adjacent to the edge and the OLED pixel units on both sides is L2, and L2 is twice L1, which can ensure that the positions of the OLED pixel units on the entire OLED splicing screen are relatively uniform after splicing. For example, L2 can be designed to be 0.9mm, and L1 can be designed to be 0.45mm, so that the distance between the two adjacent edge OLED pixel units 51 on both sides of the splicing seam is also 0.9mm, and the distance between all pixel units is consistent.
[0037] In addition, in order to further ensure that the bending angle of the splicing portion can remain stable, a rigid member can be added at the corresponding position of the splicing portion. This embodiment provides three ways to add a rigid member. The first way is as follows: Figure 3A As shown, a strip-shaped rigid member 61 is attached to the side of the second middle region 21 facing away from the upper substrate 1; the second type is as follows Figure 3B As shown, a strip-shaped rigid member 62 is attached to the side of the second bending section 22 facing away from the upper substrate 1; the third method is as follows Figure 3C As shown, the edge of the second middle region 21 on the side facing away from the upper substrate 1 forms a right angle with the second bent section 22 , and a right-angled rigid member 63 is adhered at the right angle.
[0038] The rigidity of the strip rigid member 61 , the strip rigid member 62 , and the right-angle rigid member 63 should be greater than the rigidity of the upper substrate 1 and the lower substrate 2 . As an example, metal materials may be selected.
[0039] Further, refer to Figure 4 The OLED module also includes a mask, which includes interconnected grids and grid units surrounded by the grids. Each OLED pixel unit is located in the grid unit. The grid can block the position covered by it, while the grid unit has no shielding function, and each grid unit is evenly distributed as a whole, and has visual regularity.
[0040] The blocking grid includes a first blocking grid 71 and a second blocking grid 72. The width of the first blocking grid 71 is twice the width of the second blocking grid 72. The first blocking grid 71 covers the position between adjacent OLED pixel units, and the second blocking grid 72 covers the joint portion of the OLED module.
[0041] After the above-mentioned OLED module is spliced, although there will theoretically be a gap between the two blocking grids 72 of adjacent splicing parts, this gap is much smaller than the gap of two bent splicing parts directly spliced together, because the angle of the bent part is difficult to be accurately 90 degrees. Therefore, adding a flat blocking grid 72 before splicing is helpful to reduce the splicing seam.
[0042] Figure 5 The structure of the OLED splicing screen provided by the second embodiment of the utility model is shown, including a plurality of OLED modules 80 as described in the first embodiment, and adjacent OLED modules 80 are spliced through the splicing part. It should be noted that this embodiment is applicable to the case where the OLED module of the first embodiment does not include a mask. As described above, splicing can be performed in one-dimensional direction or two-dimensional direction as required.
[0043] like Fig. 6A and Figure 6B As shown, the OLED spliced screen also includes a mask 81, which includes mutually connected blocking grids 811 and grid units 812 surrounded by the blocking grids 811. The blocking grids 811 can block the positions covered by them, while the grid units 812 have no blocking function.
[0044] The joints between adjacent OLED modules 80 are covered with barriers 811, and the OLED pixel unit 5 is located in the grid unit 812. By covering the joints with barriers 811, the joints can be concealed, and no traces of joints can be seen in appearance, which is more beautiful.
[0045] Furthermore, in addition to covering the joint seam, the barrier 811 also covers the position between the adjacent OLED pixel units 5. Fig. 7A and Figure 7B As shown, the shapes and sizes of the grid units 812 surrounded by the grids 811 are completely consistent and evenly distributed as a whole, which can make the distribution of the grids 811 and the grid units 812 more regular and enhance the aesthetics. For example, the grid unit 812 can be designed to be rectangular, and the distance between the grids 811 is designed to be 0.9 mm, which is the same as the spacing of the OLED pixel unit 5.
[0046] Furthermore, if Figure 8 As shown, in the OLED splicing screen, at least one OLED module 80 is provided with a light-transmitting area 801, and a camera 802 is fixed on the backlight side of the OLED module 80 opposite to the light-transmitting area 801. The camera 802 is used to capture the video image of the user on the light-emitting side through the light-transmitting area 801.
[0047] This embodiment can be used in video conferencing scenarios. By setting a camera 802 in the OLED splicing screen, the image information in front of the screen can be obtained, so as to confirm the position of the person and adjust the display screen in real time to achieve the effect of eye contact in the video conference. Preferably, there are multiple cameras 802. For example, in a video conference between A and B, A uses display screen A and B uses display screen B. Display screen A can identify the area where B (preferably B's eyes) specifically appears on display screen A, so as to control the image obtained by the camera 802 set in the area to be transmitted to display screen B used by B for display.
[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An OLED module, comprising an upper substrate and a lower substrate; characterized in that: The upper substrate includes a first middle region, at least one edge of the first middle region has a first bending section, and the first bending section extends from the edge of the first middle region toward a direction perpendicular to the first middle region; The lower substrate includes a second middle region, at least one edge of the second middle region has a second bending section, and the second bending section extends from the edge of the second middle region toward a direction perpendicular to the second middle region; At each edge, the end of the first bending section and the end of the second bending section are sealed together and serve as a splicing portion for splicing with other OLED modules, and the splicing portion has a packaging port; An integrated driving electrode layer is attached to the second middle region and the second bending section on the side facing the upper substrate, an OLED pixel unit is arranged on the driving electrode layer on the second middle region, while an OLED pixel unit is not arranged on the driving electrode layer on the second bending section; the electrode leads of the driving electrode layer are led out through the packaging port.
2. The OLED module according to claim 1, wherein: The OLED pixel units include OLED pixel units adjacent to an edge and OLED pixel units not adjacent to an edge, the OLED pixel units adjacent to an edge are adjacent to the second bending section, and the OLED pixel units not adjacent to an edge are located between the OLED pixel units adjacent to the edges; The distance between the OLED pixel unit adjacent to the edge and the outermost side of the splicing portion is L1, and the distance between the OLED pixel unit not adjacent to the edge and the OLED pixel units on both sides is L2, and L2 is twice of L1.
3. The OLED module according to claim 1, wherein: A strip-shaped rigid member is attached to a side of the edge of the second middle region facing away from the upper substrate; or a strip-shaped rigid member is attached to a side of the second bending section facing away from the upper substrate.
4. The OLED module according to claim 1, wherein: The side of the edge of the second middle region facing away from the upper substrate forms a right angle with the second bending section, and a right-angled rigid member is attached to the position of the right angle.
5. The OLED module according to any one of claims 1 to 4, characterized in that: The thickness of the OLED module is not greater than 0.3 mm, and the lengths of the first bending section and the second bending section are not less than 2 mm.
6. The OLED module according to claim 1, wherein: The OLED module further comprises a mask, wherein the mask comprises interconnected grids and grid units surrounded by the grids, each of the OLED pixel units is located in the grid units, and each of the grid units is uniformly distributed as a whole; The blocking grid includes a first blocking grid and a second blocking grid, and the width of the first blocking grid is twice the width of the second blocking grid; The position between adjacent OLED pixel units is covered with the first barrier, and the joint portion of the OLED module is covered with the second barrier.
7. An OLED splicing screen, characterized in that: It comprises a plurality of OLED modules as described in any one of claims 1 to 5, and adjacent OLED modules are spliced through the splicing part.
8. The OLED splicing screen according to claim 7, characterized in that: The OLED splicing screen includes a mask, and the mask includes mutually connected blocking grids and grid units surrounded by the blocking grids; The positions of the joints between adjacent OLED modules are covered with the blocking grids, and the OLED pixel units are located in the grid units.
9. The OLED splicing screen according to claim 8, characterized in that: The positions between adjacent OLED pixel units are also covered with the grids, and the grid units are evenly distributed as a whole.
10. The OLED splicing screen according to any one of claims 7 to 9, characterized in that: At least one OLED module is provided with a light-transmitting area, and a camera is fixed on the backlight side of the OLED module opposite to the light-transmitting area. The camera is used to capture a video image of a user located on the light-emitting side through the light-transmitting area.