Spliced display module and spliced screen

Abstract

The application provides a spliced display module and a spliced screen. The spliced display module comprises at least two first display panels and one second display panel. Two adjacent first display panels are spliced to form a splicing area. The second display panel is arranged corresponding to the splicing area. A first light shielding part is arranged on one side of a first light emitting device on the second display panel. The first light shielding part can shield the large viewing angle light emission of the first light emitting device, thereby limiting the large viewing angle light emission of the first sub-pixel contributing to the blue light, adjusting the chroma of the second display panel in the first direction, matching the change rule of the chroma difference of the first display panel in the first direction with the viewing angle, and thereby reducing the large viewing angle difference between the second display panel and the first display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a splicing display module and a splicing screen. Background Technology

[0002] Liquid Crystal Display (LCD) devices are currently the most widely used display products on the market. Their manufacturing technology is mature, resulting in high yield rates, relatively low production costs, and high market acceptance. Currently, the demand for ultra-large display screens is increasing daily, and their applications are becoming more widespread. However, due to technological limitations, the integrated manufacturing process for ultra-large displays is difficult and costly. Therefore, splicing screen technology is an effective way to achieve larger display device sizes. For example, two LCD devices can be spliced ​​together to form a video wall. However, the resulting video wall has seams, affecting the visual effect.

[0003] To eliminate the seams in video wall displays, LED (Light Emitting Diode) light strips can be installed at the seams. However, due to the different light-emitting mechanisms of LEDs and LCDs, there is a significant difference in viewing angle between the LED light strips and the LCD display devices, causing the LED light strips to appear bluish relative to the LCD display devices at a wide viewing angle. Summary of the Invention

[0004] This application provides a splicing display module and splicing screen to improve the technical problem of large viewing angle difference between light-emitting diode light strips and liquid crystal display devices.

[0005] To solve the above problems, the technical solution provided in this application is as follows:

[0006] This application provides a splicing display module, which includes:

[0007] At least two first display panels, with two adjacent first display panels spliced ​​together to form a splicing area;

[0008] The second display panel is configured corresponding to the splicing area. The second display panel includes a driving substrate and at least one light-emitting pixel disposed on the driving substrate. The light-emitting pixel includes a first sub-pixel that contributes blue light. The first sub-pixel includes a first light-emitting device.

[0009] The second display panel further includes a light-shielding member disposed on the driving substrate. The light-shielding member includes a first light-shielding portion disposed on one side of the first light-emitting device. The first light-shielding portion and the first light-emitting device are alternately arranged in a first direction. The first light-shielding portion defines the light emission angle of the first light-emitting device in the first direction.

[0010] In the splicing display module provided in the embodiments of this application, the light-emitting pixel further includes a second sub-pixel that contributes green light and a third sub-pixel that contributes red light. The second sub-pixel includes a second light-emitting device, and the third sub-pixel includes a third light-emitting device. The first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged sequentially in a second direction, and the second direction intersects with the first direction.

[0011] The light-shielding component further includes a second light-shielding part located on the other side of the first light-emitting device, and in the first direction, the first light-emitting device is located between the first light-shielding part and the second light-shielding part.

[0012] In the splicing display module provided in the embodiments of this application, the light-shielding component further includes a third light-shielding part disposed on one side of the second light-emitting device. The third light-shielding part and the second light-emitting device are arranged alternately in a first direction, and the third light-shielding part is disposed corresponding to the first light-shielding part in the second direction.

[0013] In the splicing display module provided in the embodiments of this application, the light-shielding component further includes a fourth light-shielding part disposed on the other side of the second light-emitting device. In the first direction, the second light-emitting device is located between the third light-shielding part and the fourth light-shielding part, and the fourth light-shielding part is disposed corresponding to the second light-shielding part in the second direction.

[0014] In the splicing display module provided in this application embodiment, the third light-shielding part and the fourth light-shielding part have the same height, the second light-shielding part and the first light-shielding part have the same height, and the height of the first light-shielding part is less than the height of the third light-shielding part.

[0015] In the splicing display module provided in the embodiments of this application, there is a first gap between the first light-shielding part and the first light-emitting device, a second gap between the second light-shielding part and the first light-emitting device, a third gap between the third light-shielding part and the second light-emitting device, and a fourth gap between the fourth light-shielding part and the second light-emitting device. The first gap, the second gap, the third gap and the fourth gap are all greater than or equal to 0um and less than or equal to 90um.

[0016] In the splicing display module provided in the embodiments of this application, in the second direction, the length of the first light-shielding part is greater than or equal to the length of the first light-emitting device, the length of the second light-shielding part is greater than or equal to the length of the first light-emitting device, the length of the third light-shielding part is greater than or equal to the length of the second light-emitting device, and the length of the fourth light-shielding part is greater than or equal to the length of the second light-emitting device.

[0017] In the splicing display module provided in the embodiments of this application, the light-emitting pixel further includes a second sub-pixel that contributes green light and a third sub-pixel that contributes red light. The second sub-pixel includes a second light-emitting device, and the third sub-pixel includes a third light-emitting device. The first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged sequentially in a first direction.

[0018] The light-shielding component further includes a third light-shielding part disposed on one side of the second light-emitting device, and both the third light-shielding part and the first light-shielding part are located between the first light-emitting device and the second light-emitting device.

[0019] In the splicing display module provided in this application embodiment, the first light-shielding part and the third light-shielding part are integrally disposed.

[0020] In the splicing display module provided in this application embodiment, the height of the light-shielding member is less than or equal to the height of the first light-emitting device.

[0021] In the splicing display module provided in the embodiments of this application, the second display panel further includes a privacy film disposed on the side of the first light-emitting device away from the driving substrate.

[0022] This application also provides a splicing screen, which includes the splicing display module described in one of the foregoing embodiments.

[0023] The beneficial effects of this application are as follows: In the splicing display module and splicing screen provided by this application, the splicing display module includes at least two first display panels and one second display panel. Two adjacent first display panels are spliced ​​together to form a splicing area. The second display panel is arranged corresponding to the splicing area. A first light-shielding part is arranged on one side of the first light-emitting device on the second display panel. The first light-shielding part and the first light-emitting device are arranged alternately in the first direction. The first light-shielding part can block the light emission of the first light-emitting device from the large viewing angle, thereby limiting the light emission of the first sub-pixel that contributes blue light from the large viewing angle, so as to adjust the chromaticity of the second display panel from the large viewing angle in the first direction, so as to match the chromaticity difference of the first display panel from the large viewing angle in the first direction with the change law of the viewing angle, thereby reducing the large viewing angle chromaticity difference between the second display panel and the first display panel, and improving the problem that the large viewing angle chromaticity difference between the light-emitting diode strip and the liquid crystal display device causes the light-emitting diode strip to be bluish relative to the liquid crystal display device from the large viewing angle. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram showing the color difference viewing angle curves of LED and LCD is presented.

[0026] Figure 2 This is a schematic diagram of a planar structure of a splicing display module provided in an embodiment of this application.

[0027] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the M-M' direction.

[0028] Figure 4 for Figure 2 A schematic diagram showing the partial structural details of the second display panel.

[0029] Figure 5 for Figure 2 A schematic diagram of the brightness of the second display panel from various viewing angles.

[0030] Figure 6 This is a schematic diagram of a second planar structure for arranging light-shielding elements according to an embodiment of this application.

[0031] Figure 7 This is a schematic diagram of a third planar structure for arranging light-shielding elements according to an embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the fourth planar structure for arranging light-shielding elements according to an embodiment of this application.

[0033] Figure 9 This is a schematic diagram of the fifth planar structure for arranging light-shielding elements according to an embodiment of this application.

[0034] Figure 10 This is a schematic diagram of a sixth planar structure for arranging light-shielding elements according to an embodiment of this application.

[0035] Figure 11 for Figure 10 A detailed structural diagram of the middle K section.

[0036] Figure 12 for Figure 11 Schematic diagram of the cross-sectional structure along the M-M' and N-N' directions.

[0037] Figure 13A schematic diagram comparing the chromaticity difference viewing angle curves of the second display panel and the first display panel provided in an embodiment of this application.

[0038] Figure 14 This is a flowchart illustrating a method for improving color shift in splicing display modules provided in an embodiment of this application. Detailed Implementation

[0039] The following descriptions of the embodiments are based on the accompanying illustrations, illustrating specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and understanding of this application, and not for limiting this application. In the figures, structurally similar units are denoted by the same reference numerals. In the figures, the thickness of some layers and regions is exaggerated for clarity and ease of description. That is, the dimensions and thicknesses of each component shown in the figures are arbitrarily shown, but this application is not limited thereto.

[0040] To address the issue of a significant difference in viewing angle between LED strips and liquid crystal displays (LCDs), resulting in LED strips appearing bluish relative to LCDs at wide viewing angles, the inventors discovered during their research that: [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Figure 1 , Figure 1 This diagram illustrates a comparison of the chromaticity difference viewing angle curves for LED and LCD displays. Figure 1 In the diagram, curve A represents the trend of the LCD's chromaticity difference Δx with viewing angle; curve B represents the trend of the LCD's chromaticity difference Δy with viewing angle; curve C represents the trend of the LED's chromaticity difference Δx with viewing angle; and curve D represents the trend of the LED's chromaticity difference Δy with viewing angle. Figure 1 The horizontal axis represents the viewing angle, and the vertical axis represents the chromaticity difference. Chromaticity difference refers to the difference in chromaticity relative to 0° when viewed directly from different viewing angles. For example, the chromaticity difference at a 60° viewing angle is the difference between the chromaticity at a 60° viewing angle and the chromaticity at 0° when viewed directly from the side. Chromaticity difference is also known as chromaticity variation or color deviation.

[0041] from Figure 1 As can be seen, with the increase of viewing angle, the chromaticity difference Δx of LCD gradually increases, while the chromaticity difference Δy first increases and then decreases. However, with the increase of viewing angle, the chromaticity difference Δx of LED first increases and then decreases, while the chromaticity difference Δy gradually increases. The trend of chromaticity difference of LED with viewing angle is inconsistent with that of LCD. This results in a large difference in chromaticity between LED strips and LCD devices at the same viewing angle, causing LED strips to appear bluish relative to LCD devices at large viewing angles.

[0042] Therefore, the inventors of this application propose a splicing display module, a method for improving color deviation, and a splicing screen.

[0043] Please refer to Figures 1 to 5 , Figure 2 This is a schematic diagram of a planar structure of a splicing display module provided in an embodiment of this application. Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the M-M' direction. Figure 4 for Figure 2 A schematic diagram showing the partial structural details of the second display panel. Figure 5 for Figure 2 A schematic diagram of the brightness of the second display panel from various viewing angles. (Refer to...) Figure 2 The splicing display module 100 includes at least two first display panels 10 and at least one second display panel 20. Two adjacent first display panels 10 are spliced ​​together to form a splicing area PD. The second display panel 20 is positioned corresponding to the splicing area PD. The second display panel 20 is positioned in the splicing area PD so that the splicing area PD can display images, thereby eliminating the splicing gaps in the splicing display module 100 and improving the visual display effect.

[0044] The first display panel 10 includes a liquid crystal display panel, etc., and the second display panel 20 includes a light-emitting diode (LED) display panel, a micro light-emitting diode (Micro-LED) display panel, or a mini light-emitting diode (Mini-LED) display panel, etc. In this embodiment, the first display panel 10 is described as a liquid crystal display panel and the second display panel 20 as a micro light-emitting diode display panel, but this application is not limited thereto. Furthermore, Figure 2 The example shows two first display panels 10 spliced ​​together, but this application is not limited to this. For example, the splicing display module 100 in this application may also include four, six, eight or more first display panels 10 spliced ​​together, with a second display panel 20 disposed between every two spliced ​​first display panels 10.

[0045] Reference Figure 3 The second display panel 20 includes a driving substrate 21 and at least one light-emitting pixel P disposed on the driving substrate 21. The light-emitting pixel P includes a first sub-pixel SP1 that contributes blue light, a second sub-pixel SP2 that contributes green light, and a third sub-pixel SP3 that contributes red light. The first sub-pixel SP1 includes a first light-emitting device 221, the second sub-pixel SP2 includes a second light-emitting device 222, and the third sub-pixel SP3 includes a third light-emitting device 223.

[0046] The driving substrate 21 is provided with a driving circuit, which is used to drive the corresponding light-emitting device to emit light. The first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 can emit light of the same color or emit light of different colors respectively. For example, the first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 can all be blue LED chips, or the first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 can be blue LED chips, green LED chips, and red LED chips respectively.

[0047] The second display panel 20 further includes a light-shielding member 23 disposed on the driving substrate 21. The light-shielding member 23 includes a first light-shielding portion 231 disposed on one side of the first light-emitting device 221. The first light-shielding portion 231 and the first light-emitting device 221 are alternately arranged in the first direction X. The first light-shielding portion 231 can block the large-viewing-angle light emission of the first light-emitting device 221, thereby limiting the large-viewing-angle light emission of the first sub-pixel SP1 that contributes blue light, so as to adjust the chromaticity of the second display panel 20 in the first direction X, so as to match the chromaticity difference of the first display panel 10 in the first direction X with the change of viewing angle, thereby reducing the large-viewing-angle chromaticity difference between the second display panel 20 and the first display panel 10, and improving the problem that the large-viewing-angle chromaticity difference between the light-emitting diode strip and the liquid crystal display device causes the light-emitting diode strip to be bluish relative to the liquid crystal display device in the large-viewing-angle chromaticity difference.

[0048] Wherein, the first direction X is the horizontal direction. Of course, in some other embodiments, the first direction X can also be the vertical direction. Since the horizontal viewing angle range is usually larger than the vertical viewing angle range, the color shift in the horizontal viewing angle direction is greater than the color shift in the vertical viewing angle direction. Therefore, the embodiments of this application preferably improve the color shift in the horizontal viewing angle direction, that is, the first direction X is preferably the horizontal direction, but this application is not limited to this.

[0049] Specifically, continue to refer to Figure 3 The first display panel 10 includes a first substrate 11 and a second substrate 12 disposed opposite to each other, a liquid crystal layer 14 disposed between the first substrate 11 and the second substrate 12, and a sealing adhesive 13 surrounding the liquid crystal layer 14. The first substrate 11, the liquid crystal layer 14, and the second substrate 12 are sequentially disposed in the thickness direction Z of the splicing display module 100. The first substrate 11 is an array substrate, and the second substrate 12 is a color filter substrate. The first display panel 10 also includes a first polarizer 15 disposed on the side of the second substrate 12 away from the first substrate 11, and a second polarizer 16 disposed on the side of the first substrate 11 away from the second substrate 12.

[0050] The second display panel 20 further includes an encapsulation layer 24 covering the first light-emitting device 221, the second light-emitting device 222, the third light-emitting device 223, and the light-shielding member 23. The encapsulation layer 24 is used to protect each light-emitting device. The material of the encapsulation layer 24 includes epoxy resin, etc. The material of the light-shielding member 23 includes materials with light-shielding function, such as light-shielding ink, etc.

[0051] In the thickness direction Z of the splicing display module 100, the height of the light-shielding member 23 is less than or equal to the height of the first light-emitting device 221, so as to avoid excessively affecting the front-emitting light of the first light-emitting device 221. Of course, this application is not limited to this. In some other embodiments, when the color shift difference between the second display panel 20 and the first display panel 10 is large, the height of the light-shielding member 23 may also be greater than the height of the first light-emitting device 221.

[0052] Optionally, the second display panel 20 further includes a privacy film 25 disposed on the side of the first light-emitting device 221 away from the driving substrate 21. For example, the privacy film 25 may be disposed on the side of the encapsulation layer 24 away from the driving substrate 21. The privacy film 25 is used to adjust the brightness of the second display panel 20 at a wide viewing angle.

[0053] In one embodiment, reference is made to... Figure 3 and Figure 4 The first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 are arranged sequentially in the first direction X. Multiple first light-emitting devices 221 are arranged at intervals in the second direction Y. Multiple second light-emitting devices 222 are arranged at intervals in the second direction Y. Multiple third light-emitting devices 223 are arranged at intervals in the second direction Y. The second direction Y intersects with the first direction X. For example, when the first direction X is horizontal, the second direction Y is vertical.

[0054] It should be noted that, in the planar arrangement diagram of the light-emitting devices in this application, as shown... Figure 4 In order to clearly distinguish each of the light-emitting devices, the first light-emitting device 221, the second light-emitting device 222 and the third light-emitting device 223 are respectively represented as B, G and R in the figure.

[0055] Reference Figure 4The first light-emitting device 221 has a first light-shielding part 231 on one side. However, the side of the first light-emitting device 221 near the third light-emitting device 223 does not have the light-shielding part 231, to avoid affecting the light emission of the third light-emitting device 223. Similarly, the third light-emitting device 223 does not have the light-shielding part 231 around its periphery, to avoid affecting its light emission. The first light-shielding part 231 is located on the side of the first light-emitting device 221 near the second light-emitting device 222 and covers the side of the first light-emitting device 221 near the second light-emitting device 222, thus blocking the side light emission of the first light-emitting device 221 and reducing the wide-viewing angle light emission of the first sub-pixel SP1. Figure 5 As shown, Figure 5 The solid line represents the brightness change of the first sub-pixel SP1 under various viewing angles after the light-shielding element 23 is set. Figure 5 The dashed line represents the brightness change of the first sub-pixel SP1 under various viewing angles when the light-shielding element 23 is not installed. Figure 5 It can be clearly seen that after the light-shielding element 23 is set, the brightness of the first sub-pixel SP1 is reduced in all viewing angles.

[0056] Thus, when the first sub-pixel SP1 mixes light with the second sub-pixel SP2 and the third sub-pixel SP3, the proportion of the first sub-pixel SP1 decreases, while the proportions of the second sub-pixel SP2 and the third sub-pixel SP3 increase, achieving a color point tuning effect. This adjusts the chromaticity of the second display panel 20 at a large viewing angle in the first direction X, matching the chromaticity difference of the first display panel 10 at a large viewing angle in the first direction X as the viewing angle changes, thereby reducing the large viewing angle chromaticity difference between the second display panel 20 and the first display panel 10.

[0057] Optionally, the length of the light-shielding member 23 in the second direction Y is greater than or equal to the length of the corresponding light-emitting device in the second direction Y, and the length of the light-shielding member 23 beyond the corresponding light-emitting device is less than half of the distance between the light-emitting device and its adjacent light-emitting device in the second direction Y, such as 1 / 3, 1 / 4, or 1 / 5, so as to better block the corresponding light-emitting device and avoid affecting the light emission of the adjacent light-emitting device.

[0058] For example, the length of the first light-shielding part 231 in the second direction Y is greater than or equal to the length of the corresponding first light-emitting device 221 in the second direction Y, and the length of the first light-shielding part 231 extending beyond the first light-emitting device 221 is less than half the distance between two adjacent first light-emitting devices 221, so as to better block the first light-emitting device 221 and avoid affecting the light emission of the adjacent second light-emitting device 222.

[0059] In one embodiment, reference is made to... Figures 1 to 6 , Figure 6 This is a schematic diagram of a second planar structure for the arrangement of the light-shielding members 23 provided in an embodiment of this application. (Refer to...) Figure 6 ,and Figure 4 The difference in the arrangement of the light-shielding member 23 in the example is that the light-shielding member 23 further includes a third light-shielding part 233 disposed on one side of the second light-emitting device 222. The third light-shielding part 233 and the second light-emitting device 222 are arranged sequentially in the first direction X. The third light-shielding part 233 and the first light-shielding part 231 are both located between the first light-emitting device 221 and the second light-emitting device 222. The third light-shielding part 233 is located on the side of the second light-emitting device 222 closer to the first light-emitting device 221 to block the side light emitted by the second light-emitting device 222. This further matches the color difference of the first display panel 10 at a large viewing angle in the first direction X with the change of viewing angle, thereby further reducing the color shift difference between the second display panel 20 and the first display panel 10 at the same viewing angle in the first direction X. The light-shielding member 23 is not disposed on the side of the second light-emitting device 222 closer to the third light-emitting device 223 to avoid affecting the light emitted by the third light-emitting device 223.

[0060] Optionally, the third light-shielding part 233 is spaced apart from the first light-shielding part 231. The heights of the third light-shielding part 233 and the first light-shielding part 231 can be the same or different, specifically designed to reduce the color shift difference between the second display panel 20 and the first display panel 10 as needed. Other descriptions are provided in the above embodiments and will not be repeated here.

[0061] In one embodiment, reference is made to... Figures 1 to 7 , Figure 7 This is a schematic diagram of a third planar structure for arranging the light-shielding members 23 according to an embodiment of this application. (Refer to...) Figure 7 ,and Figure 6 The difference in the arrangement of the light-shielding members 23 in the example is that the first light-shielding part 231 and the third light-shielding part 233 are integrally formed. This not only reduces the color shift difference between the second display panel 20 and the first display panel 10, but also simplifies the process design and reduces the difficulty of setting the light-shielding members 23. Other descriptions are as described in the above embodiments and will not be repeated here.

[0062] In one embodiment, reference is made to... Figures 1 to 8 , Figure 8 This is a schematic diagram of a fourth planar structure for arranging the light-shielding members 23 according to an embodiment of this application. (Refer to...) Figure 8 ,and Figure 4The difference in the arrangement of the light-shielding member 23 in the example is that the first light-emitting device 221, the second light-emitting device 222, and the third light-emitting device 223 are arranged sequentially in the second direction Y, with multiple first light-emitting devices 221 arranged in the first direction X, multiple second light-emitting devices 222 arranged in the first direction X, and multiple third light-emitting devices 223 arranged in the first direction X. The light-shielding member 23 also includes a second light-shielding portion 232 located on the other side of the first light-emitting device 221, with the first light-emitting device 221 positioned between the first light-shielding portion 231 and the second light-shielding portion 232 in the first direction X. The specific design of the second light-shielding portion 232 can refer to the design of the first light-shielding portion 231.

[0063] The first light-shielding part 231 and the second light-shielding part 232 are disconnected, meaning no other light-shielding element 23 is provided between them, and they are not connected to avoid affecting the light emission of the third light-emitting device 223 adjacent to the first light-emitting device 221. Other details are provided in the above embodiment and will not be repeated here.

[0064] In one embodiment, reference is made to... Figures 1 to 9 , Figure 9 This is a schematic diagram of a fifth planar structure for the arrangement of the light-shielding members 23 provided in an embodiment of this application. (Refer to...) Figure 9 ,and Figure 8 The difference in the arrangement of the light-shielding member 23 in the example is that the light-shielding member 23 further includes a third light-shielding part 233 disposed on one side of the second light-emitting device 222 and a fourth light-shielding part 234 disposed on the other side of the second light-emitting device 222. In the first direction X, the second light-emitting device 222 is located between the third light-shielding part 233 and the fourth light-shielding part 234. The third light-shielding part 233 is disposed corresponding to the first light-shielding part 231 in the second direction Y, and the fourth light-shielding part 234 is disposed corresponding to the second light-shielding part 232 in the second direction Y. This is to further match the color difference of the first display panel 10 at a large viewing angle in the first direction X with the change of viewing angle, thereby further reducing the color shift difference between the second display panel 20 and the first display panel 10 at the same viewing angle in the first direction X. Other descriptions are as described in the above embodiments and will not be repeated here.

[0065] In one embodiment, reference is made to... Figures 1 to 12 , Figure 10 This is a schematic diagram of the sixth planar structure of the light-shielding members 23 provided in the embodiments of this application. Figure 11 for Figure 10 A detailed structural diagram of the middle K section. Figure 12for Figure 11 Schematic diagram of the cross-sectional structure along the M-M' and N-N' directions. (Refer to...) Figure 10 ,and Figure 9 The difference in the arrangement of the light-shielding parts 23 in the example is that the first light-shielding part 231, the second light-shielding part 232, the third light-shielding part 233 and the fourth light-shielding part 234 all have gaps between them and the corresponding light-emitting devices, so as to reduce the difficulty of manufacturing the light-shielding parts while satisfying the light-shielding of the light-emitting devices.

[0066] Specifically, refer to Figure 11 The first light-shielding part 231 and the first light-emitting device 221 have a first interval L1, the second light-shielding part 232 and the first light-emitting device 221 have a second interval L2, the third light-shielding part 233 and the second light-emitting device 222 have a third interval L3, and the fourth light-shielding part 234 and the second light-emitting device 222 have a fourth interval L4. The first interval L1, the second interval L2, the third interval L3 and the fourth interval L4 are all greater than or equal to 0um and less than or equal to 90um, for example, 0um, 5um, 10um, 15um, 20um, 25um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, etc.

[0067] In the second direction Y, the length of each light-shielding part is greater than or equal to the length of the corresponding light-emitting device, so as to further reduce the difficulty of manufacturing the light-shielding part while satisfying the light-shielding requirements of the light-emitting device. Specifically, the length of the first light-shielding part 231 is greater than or equal to the length of the first light-emitting device 221, the length of the second light-shielding part 232 is greater than or equal to the length of the first light-emitting device 221, the length of the third light-shielding part 233 is greater than or equal to the length of the second light-emitting device 222, and the length of the fourth light-shielding part 234 is greater than or equal to the length of the second light-emitting device 222.

[0068] Reference Figure 11Taking the first light-shielding part 231 and the third light-shielding part 233 as examples, in the second direction Y, the length of the first light-shielding part 231 is greater than the length of the first light-emitting device 221, so that the first light-shielding part 231 completely covers the side of the first light-emitting device 221 in the second direction Y and extends beyond the side of the first light-emitting device 221. The length D1 of the first light-shielding part 231 extending beyond the side of the first light-emitting device 221 is less than the pixel gap D0 between the first light-emitting device 221 and the adjacent second light-emitting device 222 or third light-emitting device, and D1 < 1 / 2D0, such as D1 ≤ 1 / 3D0, D1 ≤ 1 / 4D0, D1 ≤ 1 / 5D0, etc., so as to reduce the difficulty of manufacturing the light-shielding part while realizing the first light-shielding part 231 blocking the light emitted by the first light-emitting device 221, and avoid affecting the light emitted by the adjacent light-emitting devices.

[0069] Accordingly, in the second direction Y, the length of the third light-shielding part 233 is greater than the length of the second light-emitting device 222, so that the third light-shielding part 233 completely covers the side of the second light-emitting device 222 in the second direction Y and extends beyond the side of the second light-emitting device 222. The length D1 of the third light-shielding part 233 extending beyond the side of the second light-emitting device 222 is less than the pixel gap D0 between the second light-emitting device 222 and the adjacent first light-emitting device 221 or third light-emitting device, and D1 < 1 / 2D0, such as D1 ≤ 1 / 3D0, D1 ≤ 1 / 4D0, D1 ≤ 1 / 5D0, etc., so as to reduce the difficulty of manufacturing the light-shielding part while realizing the third light-shielding part 233 blocking the light emitted by the second light-emitting device 222, and avoid affecting the light emitted by the adjacent light-emitting device.

[0070] Reference Figure 12The third light-shielding part 233 has the same height as the fourth light-shielding part 234, and the second light-shielding part 232 has the same height as the first light-shielding part 231. The height H1 of the first light-shielding part 231 is less than the height of the first light-emitting device 221, and the height H2 of the third light-shielding part 233 is less than the height of the second light-emitting device 222. For example, when the heights of the first light-emitting device 221 and the second light-emitting device 222 are both 120 μm, the height of the first light-shielding part 231 is 71 μm, the height of the third light-shielding part 233 is 80 μm, and the distances between the first interval L1 and the third interval L3 are both 80 μm. By adjusting the height difference between the first light-shielding part 231 and the third light-shielding part 233, the chromaticity of the second display panel 20 at a large viewing angle in the first direction X can be better adjusted to better match the variation law of the chromaticity difference of the first display panel 10 at a large viewing angle in the first direction X, thereby reducing the difference in chromaticity at a large viewing angle between the second display panel 20 and the first display panel 10. Other explanations are provided in the above embodiments and will not be repeated here.

[0071] The following is based on Figure 10 The example arrangement of the light-shielding elements verifies the matching degree between the second display panel and the first display panel in this application as the viewing angle changes along the large angle difference in the first direction. (Refer to...) Figure 13 , Figure 13 This is a schematic diagram comparing the chromaticity difference viewing angle curves of the second display panel and the first display panel provided in an embodiment of this application. Figure 13 In the diagram, curve A represents the trend of chromatic difference Δx of the first display panel as a function of viewing angle; curve B represents the trend of chromatic difference Δy of the first display panel as a function of viewing angle; curve C represents the trend of chromatic difference Δx of the LED display panel without a light-shielding element as a function of viewing angle; curve D represents the trend of chromatic difference Δy of the LED display panel without a light-shielding element as a function of viewing angle; curve E represents the trend of chromatic difference Δx of the second display panel as a function of viewing angle; and curve F represents the trend of chromatic difference Δy of the second display panel as a function of viewing angle. Figure 13 The horizontal axis represents the viewing angle, and the vertical axis represents the chromaticity difference. Chromaticity difference refers to the difference in chromaticity relative to 0° when viewed directly from different viewing angles. For example, the chromaticity difference at a 60° viewing angle is the difference between the chromaticity at a 60° viewing angle and the chromaticity at 0° when viewed directly from the side. Chromaticity difference is also known as chromaticity variation or color deviation.

[0072] from Figure 13As can be seen, the color difference Δx and Δy between the LED display panel without a light-shielding element and the first display panel do not change with the viewing angle. However, the color difference Δx and Δy between the second display panel with a light-shielding element and the first display panel in this application change with the viewing angle in the same way as the color difference of the first display panel at a large viewing angle in the first direction. This can reduce the large viewing angle difference between the second display panel and the first display panel, and improve the problem that the large viewing angle difference between the LED strip and the liquid crystal display device causes the LED strip to appear bluish relative to the liquid crystal display device at a large viewing angle.

[0073] Based on the same inventive concept, this application also provides a method for improving color shift in splicing display modules, referring to... Figures 1 to 14 , Figure 14 This is a flowchart illustrating a method for improving color shift in a splicing display module according to an embodiment of this application. (Refer to...) Figure 14 The method for improving color shift in splicing display modules includes the following steps:

[0074] S201: Provide a first display panel and an analog display panel, and determine a first color deviation value between the analog display panel and the first display panel at the same viewing angle in a first direction;

[0075] Specifically, the step of determining the first color deviation value between the simulated display panel and the first display panel at the same viewing angle in the first direction includes:

[0076] Obtain the chromaticity of the first display panel at each viewing angle in the first direction, and generate a first chromaticity difference viewing angle curve;

[0077] Specifically, refer to Figure 13 By measuring the chromaticity of the first display panel at various viewing angles in the first direction and calculating the chromaticity difference at each viewing angle, a first chromaticity difference viewing angle curve is plotted, such as... Figure 13 Curves A and curve B in the diagram.

[0078] Adjust the brightness and chromaticity of the simulated display panel at the normal viewing angle to match the brightness and chromaticity of the first display panel at the normal viewing angle;

[0079] The chromaticity of the simulated display panel at each viewing angle in the first direction is obtained, and a second chromaticity difference viewing angle curve is generated;

[0080] Specifically, refer to Figure 13 By measuring the chromaticity of the simulated display panel at various viewing angles in the first direction and calculating the chromaticity difference at each viewing angle, a second chromaticity difference viewing angle curve is plotted, as shown below. Figure 13 Curves C and D in the diagram. The simulated display panel is the LED display panel without the aforementioned light-shielding element.

[0081] By comparing the first chromaticity difference viewing angle curve and the second chromaticity difference viewing angle curve, a first color deviation value is obtained between the simulated display panel and the first display panel at the same viewing angle in the first direction.

[0082] Specifically, refer to Figure 13 ,according to Figure 13 The first chromaticity difference viewing angle curve and the second chromaticity difference viewing angle curve can determine the difference in chromaticity between the analog display panel and the first display panel at each viewing angle. This difference in chromaticity difference is the first color deviation value.

[0083] S202: Determine the position and height of the virtual light-shielding component on the virtual display panel based on the first color deviation value;

[0084] Specifically, the step of determining the position and height of the virtual light-shielding element on the virtual display panel based on the first color deviation value includes:

[0085] Based on the first color deviation value, the target chromaticity of the simulated display panel at each viewing angle in the first direction is determined;

[0086] Specifically, based on the first color deviation value, the chromaticity value that the simulated display panel needs to be adjusted at each viewing angle can be obtained. The chromaticity value that needs to be adjusted is the chromaticity value that needs to be compensated. The chromaticity value that needs to be compensated plus the chromaticity value that is far away at the corresponding viewing angle is the target chromaticity.

[0087] Based on the target chromaticity, determine the brightness ratio of the simulated display panel at each viewing angle in the first direction;

[0088] Specifically, the brightness ratio at the corresponding viewing angle can be obtained based on the target chromaticity. The brightness ratio includes the brightness of sub-pixels that contribute red light, sub-pixels that contribute green light, and sub-pixels that contribute blue light.

[0089] The position and height of the virtual light-blocking element on the virtual display panel are determined based on the brightness ratio.

[0090] Specifically, based on the brightness ratio under various viewing angles, the light emitted by some sub-pixels can be blocked by setting virtual light-blocking components. For example, by adjusting the setting position and height of the virtual light-blocking components, the proportion of the blocked sub-pixels in the light mixing can be adjusted, thereby achieving the target chromaticity. Thus, the position and height of the proposed light-blocking component can be determined.

[0091] S203: Based on the structure of the simulated display panel, the second display panel is fabricated, and a light-shielding member is set on the second display panel according to the position and height of the virtual light-shielding member. The light-shielding member includes a first light-shielding part disposed on one side of the first light-emitting device on the second display panel. The first light-shielding part and the first light-emitting device are alternately arranged in the first direction. The light-shielding part limits the light emission angle of the first light-emitting device in the first direction.

[0092] S204: At least two of the first display panels are spliced ​​together to form a splicing area, and a second display panel is placed in the splicing area to form a splicing display module.

[0093] Based on the same inventive concept, this application also provides a splicing screen, which includes the splicing display module 100 described in one of the foregoing embodiments.

[0094] As can be seen from the above embodiments:

[0095] This application provides a splicing display module and a method for improving color shift. In the splicing screen, the splicing display module includes at least two first display panels and one second display panel. Two adjacent first display panels are spliced ​​together to form a splicing area. The second display panel is arranged corresponding to the splicing area. A first light-shielding part is arranged on one side of a first light-emitting device on the second display panel. The first light-shielding part and the first light-emitting device are arranged alternately in a first direction. The first light-shielding part can block the light emission of the first light-emitting device from the large viewing angle, thereby limiting the light emission of the first sub-pixel that contributes blue light from the large viewing angle. This adjusts the chromaticity of the second display panel from the large viewing angle in the first direction, matching the chromaticity difference of the first display panel from the large viewing angle in the first direction with the changing law of the viewing angle. This reduces the large viewing angle chromaticity difference between the second display panel and the first display panel, and improves the problem that the large viewing angle chromaticity difference between the light-emitting diode strip and the liquid crystal display device causes the light-emitting diode strip to appear bluish relative to the liquid crystal display device at a large viewing angle.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A splicing display module, characterized in that, include: At least two first display panels, with two adjacent first display panels spliced ​​together to form a splicing area; The second display panel is configured corresponding to the splicing area. The second display panel includes a driving substrate and at least one light-emitting pixel disposed on the driving substrate. The light-emitting pixel includes a first sub-pixel that contributes blue light, a second sub-pixel that contributes green light, and a third sub-pixel that contributes red light. The first sub-pixel includes a first light-emitting device, the second sub-pixel includes a second light-emitting device, and the third sub-pixel includes a third light-emitting device. The second display panel further includes a light-shielding member disposed on the driving substrate, the light-shielding member comprising: The first light-shielding part and the second light-shielding part are respectively disposed on both sides of the first light-emitting device, and the first light-shielding part, the first light-emitting device and the second light-shielding part are arranged sequentially in the first direction. The third light-shielding part and the fourth light-shielding part are respectively disposed on both sides of the second light-emitting device, and the third light-shielding part, the second light-emitting device and the fourth light-shielding part are arranged sequentially in the first direction; Wherein, the third light-shielding part and the fourth light-shielding part have the same height and are less than the height of the second light-emitting device; the second light-shielding part and the first light-shielding part have the same height and are less than the height of the first light-emitting device; the first light-shielding part has a height less than the third light-shielding part; and the third light-emitting device has no light-shielding parts on either side of the first direction.

2. The splicing display module according to claim 1, characterized in that, The first light-emitting device, the second light-emitting device, and the third light-emitting device are arranged sequentially in a second direction, which intersects with the first direction.

3. The splicing display module according to claim 2, characterized in that, The third light-shielding part is disposed corresponding to the first light-shielding part in the second direction.

4. The splicing display module according to claim 3, characterized in that, The fourth light-shielding part is disposed corresponding to the second light-shielding part in the second direction.

5. The splicing display module according to claim 4, characterized in that, The first light-shielding part and the first light-emitting device have a first gap, the second light-shielding part and the first light-emitting device have a second gap, the third light-shielding part and the second light-emitting device have a third gap, and the fourth light-shielding part and the second light-emitting device have a fourth gap. The first gap, the second gap, the third gap and the fourth gap are all greater than or equal to 0 μm and less than or equal to 90 μm.

6. The splicing display module according to claim 4, characterized in that, In the second direction, the length of the first light-shielding part is greater than or equal to the length of the first light-emitting device, the length of the second light-shielding part is greater than or equal to the length of the first light-emitting device, the length of the third light-shielding part is greater than or equal to the length of the second light-emitting device, and the length of the fourth light-shielding part is greater than or equal to the length of the second light-emitting device.

7. The splicing display module according to any one of claims 1 to 6, characterized in that, The height of the light-shielding component is less than or equal to the height of the first light-emitting device.

8. The splicing display module according to claim 7, characterized in that, The second display panel also includes a privacy film disposed on the side of the first light-emitting device away from the driving substrate.

9. A video wall, characterized in that, Includes the splicing display module as described in any one of claims 1 to 8.

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