Display screen

Abstract

The utility model relates to a display screen, which belongs to the technical field of display screen assembly, and comprises a plurality of display modules and a polaroid, and the plurality of display modules are spliced in sequence; the polaroid is arranged between two adjacent display modules, the polaroid comprises a first side wall and a second side wall which are oppositely arranged, and the first side wall and the second side wall face the adjacent display modules respectively; the first side wall is attached to the side face of one display module, and the second side wall is attached to the side face of the other adjacent display module. The polaroid is used for weakening or enhancing the light intensity of at least one color in the three-primary-color light so as to reconcile the light color of the splicing position of the display modules, then cyan lines or yellow lines between the adjacent display modules are eliminated, display flaws of the small-spacing LED display modules are avoided, the consistency of the product display effect is improved, and the product quality is improved. And the use experience of customers is perfected.

Description

Technical Field

[0001] The utility model relates to the technical field of display module assembly, in particular to a display screen. Background Art

[0002] With the rapid development of digital media, advertising, surveillance, and conferencing in the field of LED display applications, users have increasingly demanded higher clarity and detail in displayed images. This is especially true in scenarios such as conferencing, surveillance, and broadcasting, as well as in technical fields such as 3D display, interactive display, and virtual reality (VR) / augmented reality (AR) integration, where the pixel quality of LED display modules is crucial.

[0003] As customer demands grow, the requirements for high precision, high definition, and consistency in display devices are becoming increasingly stringent. The pixel pitches between adjacent pixels in display modules are becoming increasingly smaller (e.g., P0.9, P0.7, P0.6, P0.4, etc.), leading to increasingly noticeable issues. For example, blue and yellow lines are becoming increasingly visible at the joints of display modules, impacting the display consistency of large screens and the user experience. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problem that traditional LED display modules are prone to produce green and yellow lines at the splicing points.

[0005] In order to solve the above technical problems, the present application provides a display screen, including: a display module, which is provided in plurality and the plurality of display modules are spliced in sequence; a polarizer, which is arranged between two adjacent display modules, the polarizer including a first side wall and a second side wall arranged opposite to each other, the first side wall and the second side wall respectively facing the adjacent display modules; the first side wall is adhered to the side surface of one display module, and the second side wall is adhered to the side surface of another adjacent display module.

[0006] In some examples of the present application, the first side wall and the second side wall are bonded to the side surfaces of the display module.

[0007] In some examples of the present application, a mounting groove is provided at the joint of adjacent display modules, the mounting groove extends along the joint gap between adjacent display modules, and the polarizer is fixed in the mounting groove.

[0008] In some examples of the present application, the display module includes a PCB substrate and a plurality of pixel units, and the plurality of pixel units are evenly spaced and arranged on the PCB substrate; and the spacing between adjacent pixel units is less than or equal to 0.9 mm.

[0009] In some examples of the present application, each of the pixel units includes red, green, and blue LED chips arranged at intervals in a first direction, for respectively emitting red light, green light, and blue light; the polarizing plate extends in a second direction perpendicular to the first direction and is used to weaken or enhance the light intensity of at least one of red light, green light, and blue light.

[0010] In some examples of the present application, the distance between the first side wall and the second side wall of the polarizing plate is less than the pitch between adjacent pixel units.

[0011] In some examples of the present application, the display module further includes a packaging layer covering the PCB substrate; the polarizing plate is arranged between adjacent display modules; the top surface of the polarizing plate is flush with the top surface of the packaging layer away from the PCB substrate.

[0012] In some examples of the present application, the extension length of the polarizing plate is greater than or equal to the length of the display module, so that the polarizing plate can cover the entire side surface of the display module.

[0013] In some examples of the present application, the polarizing plate includes a polyvinyl alcohol layer and triacetyl cellulose layers provided on both sides thereof.

[0014] In some examples of the present application, the polarizing plate further includes a protective film layer, a pressure-sensitive adhesive layer, and a release film layer; the protective film layer is provided on the outer side surface of one of the triacetyl cellulose layers; the pressure-sensitive adhesive layer and the release film layer are provided on the outer side surface of the other triacetyl cellulose layer.

[0015] As can be seen from the above technical solutions, the beneficial effects of the present utility model are:

[0016] The present application provides a display screen, which is provided with a polarizing plate between two adjacent display modules. The first side wall of the polarizing plate is attached to the side surface of one display module, and the second side wall of the polarizing plate is attached to the side surface of another adjacent display module, so that the polarizing plate is in contact with the side surfaces between the adjacent two display modules. The polarizing plate can be used to weaken or enhance at least one of the three primary color lights, so that the polarizing plate can adjust the intensity of the three primary color lights at the splicing position of the adjacent display modules, make the light intensity ratio at the splicing position of the adjacent display modules appropriate, eliminate the cyan line or yellow line between the adjacent display modules, avoid the display defects of the small-pitch LED display modules, improve the consistency of the product display effect, and improve the customer's use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram after splicing multiple traditional display modules.

[0018] Figure 2Schematic diagram of the principle of yellow lines appearing after splicing traditional display modules.

[0019] Figure 3 Schematic diagram of the principle of cyan lines appearing after splicing traditional display modules.

[0020] Figure 4 Schematic diagram of an installation structure of a polarizer on the side of a display module.

[0021] Figure 5 Schematic diagram of another installation structure of a polarizer on the side of a display module.

[0022] Figure 6 Schematic diagram of the three-dimensional structure of a polarizer.

[0023] Figure 7 For Figure 5 Side view schematic diagram of the polarizer in

[0024] Explanation of reference numerals is as follows:

[0025] 100, display screen; 10, display module; 11, PCB substrate; 111, splicing gap; 112, substrate cross-section; 12, pixel unit; 121, red LED chip; 122, green LED chip; 123, blue LED chip; 13, encapsulation layer; 20, polarizer; 21, polyvinyl alcohol layer; 22, triacetyl cellulose layer; 23, protective film layer; 24, pressure-sensitive adhesive layer; 25, release film layer. Detailed implementation manners

[0026] Typical implementation manners reflecting the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various changes in different implementation manners, all of which do not depart from the scope of the present utility model, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present utility model.

[0027] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indication of the direction or position relationship (such as up, down, left, right, front, and back, etc.) is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. When these elements are in the positions shown in the drawings, these descriptions are appropriate. If the description of the positions of these elements changes, then the indication of these directions also changes accordingly.

[0028] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0029] Please refer to Figures 1 to 3 , with the improvement of the display effect on the high-definition display screen 100, the pitch of the pixel points of the LED display screen 100 gradually decreases. At the same time, the problem of cyan-yellow lines appearing at the joints of multiple display modules 10 becomes more obvious.

[0030] Currently, the common method to solve the cyan-yellow line problem is to adopt the black coating technology. That is, a layer of black coating is applied to the side of the display module 10 to reduce the light leakage from the side of the display module 10 and suppress the overflow of side light. It does reduce the cyan-yellow line phenomenon to a certain extent. However, the black coating treatment also has obvious defects: a dark line will be formed at the joint of the display modules 10, affecting the overall brightness and color uniformity of the display screen 100. Especially when playing high-brightness images, the dark line problem at the joint will be particularly prominent, further affecting the user's viewing experience. Obviously, although the black coating has a certain effect in suppressing light overflow, it does not completely solve the cyan-yellow line problem, but instead brings new display defects.

[0031] The inventor found that the main reason for the generation of the traditional cyan-yellow line is the uneven light mixing at the edge of the display module 10, resulting in obvious cyan or yellow lines in the viewing angle in the non-normal direction.

[0032] Specifically, as Figure 2 shown, when the display screen 100 plays white light, generally white light is composed of the three primary colors of red (R), green (G), and blue (B). The red light accounts for about 30% of the light intensity, the green light accounts for about 60% of the light intensity, and the blue light only accounts for 10% of the light intensity. However, at the joint of the display modules 10, due to the low brightness of the blue light and being blocked by the red and green lights, it is difficult to reach the edge. This makes the red and green lights stronger at the splicing gap 111, thus mixing to form yellowish light. That is, the superposition effect of the red and green lights at the edge is obvious, but the balance of the blue light is lacking, resulting in the formation of yellow lines.

[0033] As Figure 3As shown in the figure, the generation principle of the cyan line is similar to that of the yellow line. Since the blue light is on the outer layer of the display module 10 and closest to the edge of the display module 10, the blue light is relatively easy to emit. However, the red light is located in a more inner layer and is blocked by the blue light and green light, so it cannot reach the edge. In this case, at the edge of the display module 10, the light intensity of the red light is weakened, and it cannot fully and effectively participate in the light mixing. When it is mixed with the stronger blue light and green light, a cyan line appears at the splicing gap 111 of the display module 10.

[0034] Please refer to Figure 4 and Figure 5 , in this embodiment, for the generation principle of the cyan and yellow lines, a new display screen 100 is provided, which includes a plurality of display modules 10 and a polarizer 20.

[0035] Among them, a plurality of display modules 10 are spliced in sequence. The polarizer 20 is disposed between two adjacent display modules 10 and abuts against the side surfaces between two adjacent display modules 10. The polarizer 20 is used to weaken or enhance the light intensity of at least one color in the three primary color lights, so as to reconcile the light colors at the splicing position of adjacent display modules 10, and thus eliminate the cyan or yellow lines between adjacent display modules 10.

[0036] Specifically, the main function of the polarizer 20 is to adjust the light intensity at the splicing position of adjacent display modules 10, and specifically achieve color reconciliation by enhancing or filtering and weakening at least one color in the three primary color lights (R red, G green, B blue).

[0037] For example: in the example of eliminating the yellow line: the yellow line is mainly generated by the mixing of stronger red light and green light and weaker blue light at the splicing position. Therefore, in order to solve the problem of the yellow line, the polarizer 20 between two display modules 10 can weaken the intensity of the red light and green light, or enhance the intensity of the blue light. Thus, the color of the light at the splicing position is balanced, and the obvious yellow line no longer appears.

[0038] In the example of eliminating the cyan line: the generation of the cyan line is mainly due to the mixing of stronger blue light and green light and weaker red light at the splicing position, and the red light cannot fully and effectively participate in the mixing. Therefore, in order to eliminate the cyan line, the polarizer 20 at this position can weaken the intensity of the green light and blue light, or enhance the intensity of the red light, so as to eliminate the visual effect of the cyan line.

[0039] The polarizer 20 ensures uniform light intensity at the splicing gap 111 between adjacent display modules 10 by precisely adjusting the light intensity of the three primary colors of light, eliminating the cyan-yellow line phenomenon generated at the splicing, thereby improving the overall color uniformity and visual effect of the display screen 100, and enhancing the picture display quality of the small-pitch LED display screen 100. Moreover, it can avoid the dark line problem caused by the black coating in the prior art, making the light distribution of the entire screen more uniform and the display effect more consistent and stable.

[0040] Please refer to Figure 3 and Figure 4 In some embodiments, the display module 10 includes a PCB substrate 11, a plurality of pixel units 12, and a packaging layer 13. The plurality of pixel units 12 are uniformly spaced on the PCB substrate 11. The packaging layer 13 covers the PCB substrate 11 and encapsulates the pixel units 12 thereon.

[0041] Specifically, the PCB substrate 11, as the support and electrical connection part of the display module 10, is usually made of materials with high conductivity and heat dissipation to provide a stable power and signal transmission channel for the pixel units 12, ensuring that each pixel unit 12 can receive correct signal instructions and emit precise light. The plurality of pixel units 12 are uniformly arranged at intervals on the PCB substrate 11, and the interval distance between each pixel unit 12 determines the overall resolution of the display screen 100.

[0042] The packaging layer 13 covers the surface of the PCB substrate 11 and encapsulates the pixel units 12 thereon, preventing the PCB substrate 11 and the pixel units 12 from being affected by the external environment, such as dust, moisture, mechanical shock, etc., to extend the service life and reliability of the display module 10. Moreover, the optical effects such as the transparency and refractive index of the packaging layer 13 can be designed according to the actual situation, as long as the light emission effect can be ensured and the emitted light is soft and natural.

[0043] In some embodiments, the distance between adjacent pixel units 12 on each display module 10 is less than or equal to 0.9 mm.

[0044] Specifically, the distance between adjacent pixel units 12 can be P0.9, P0.7, P0.6, P0.4, etc. The small distance between its pixel units 12 can significantly increase the number of pixels per unit area. Thereby improving the resolution of the display screen 100, enabling the display screen 100 to display more delicate pictures, especially in scenarios that require high-quality images and fine content display, such as commercial display screens 100 for close viewing, large advertising screens, command and control centers, etc.

[0045] Please refer to Figure 2 andFigure 3 , in some embodiments, each pixel unit 12 includes red, green, and blue LED chips arranged at intervals along a first direction, for emitting red light, green light, and blue light respectively. At this time, the polarizer 20 extends along a second direction perpendicular to the first direction.

[0046] Among them, as Figure 2 shown, the red, green, and blue LED chips (RGB lights) in each pixel unit 12 are arranged in a predetermined first direction, and from top to bottom, they can be a red light LED chip 121, a green light LED chip 122, and a blue light LED chip 123 in sequence, which can emit light of corresponding colors respectively.

[0047] When multiple display modules 10 are spliced along the first direction (vertically spliced), cyan lines or yellow lines will be generated due to uneven light intensity between adjacent splicing gaps 111. However, when the display module is spliced along the second direction (horizontally spliced), since the red light LED chip 121, the green light LED chip 122, and the blue light LED chip 123 are at the same distance from the edge and do not block each other, no cyan or yellow lines will appear. Therefore, the polarizer 20 in this embodiment extends along a second direction perpendicular to the first direction, that is, the extension direction of the polarizer 20 is perpendicular to the arrangement direction of the red light LED chip 121, the green light LED chip 122, and the blue light LED chip 123 at intervals, and it can effectively avoid the cyan lines or yellow lines generated when the display module 10 is spliced along the first direction.

[0048] Please refer to Figure 6 and Figure 7 , in some embodiments, the polarizer 20 includes a polyvinyl alcohol layer 21 and triacetyl cellulose layers 22 provided on both sides thereof.

[0049] Specifically, the polarizer 20 can filter light by setting the middle polyvinyl alcohol layer 21 (PVA layer), so that only polarized light in a specific direction can pass through, thereby weakening the intensity of some colors of light and relatively strengthening the intensity of some other colors of light, and then achieving the effect of mixing the three primary colors of light, so that the intensity of one or two colors of light will not be too strong and cause color distortion.

[0050] For example, when eliminating the yellow line, the polarizer can absorb part of the red light and green light to weaken the intensity of the red light and green light, so as to balance the color of the light at the splicing part and make it no longer show an obvious yellow line. When eliminating the cyan line, the polarizer can absorb part of the blue light and green light to weaken the intensity of the blue light and green light, so that it no longer shows an obvious cyan line.

[0051] The triacetyl cellulose layers 22 (TAC) disposed on both sides of the polyvinyl alcohol layer 21 (PVA layer) are a commonly used protective layer, which helps to improve the durability of the polarizer 20 while maintaining its excellent optical performance. Using a polarizer as the polarizer 20 can effectively improve the color contrast at the connection, reduce light scattering and interference, and enhance the image clarity. Moreover, the polarizer can also effectively reduce the visual defects caused by scattered light in the display screen 100 by controlling the propagation direction of light.

[0052] Please refer to Figure 7 , in some embodiments, the polarizer 20 further includes a protective film layer 23, a pressure-sensitive adhesive layer 24, and a release film layer 25. The protective film layer 23 is disposed on the outer side surface of one triacetyl cellulose layer 22; the pressure-sensitive adhesive layer 24 and the release film layer 25 are sequentially disposed on the outer side surface of the other triacetyl cellulose layer 22.

[0053] Specifically, the protective film layer 23 (Protective film) is disposed on the outer side surface of one triacetyl cellulose layer 22 (TAC), which can protect the core area of the polarizer from physical damage or scratches. Especially when the polarizer 20 is installed with the display module 10, it can further protect the polarizer 20. And a pressure-sensitive adhesive layer 24 (PSA) is disposed on the outer side surface of the other triacetyl cellulose layer 22 to provide an adhesion force between the side surfaces of the polarizer 20 and the display module 10, so that the polarizer 20 can be adhered to the side surface of the display screen 100 module. The release film layer 25 (Release film) is disposed on the side of the pressure-sensitive adhesive layer 24 facing away from the triacetyl cellulose layer 22 to protect the pressure-sensitive adhesive layer 24 from being contaminated or damaged during storage and transportation. The release film will be removed during actual use, so that the pressure-sensitive adhesive layer 24 can be in close contact with the surface of the display module 10 to achieve effective adhesion.

[0054] Please refer to Figure 4 , in some embodiments, the polarizer 20 includes opposite first sidewalls and second sidewalls. The first sidewall and the second sidewall are respectively arranged facing the adjacent display module 10. And the first sidewall is attached to the side surface of a display module 10, and the second sidewall is attached to the side surface of another adjacent display module 10. The polarizer 20 can abut against two adjacent display modules 10.

[0055] Furthermore, the first sidewall is adhered to the side surface of a display module 10, and the second sidewall is adhered to the side surface of another adjacent display module 10.

[0056] During the assembly of the display screen 100, the release film layer 25 on the first sidewall of the polarizer 20 can be torn off first, and then the pressure-sensitive adhesive layer 24 can be fixed to the side of a display module 10, so that the polarizer 20 can be fixed on the display module 10. Then, another display module 10 is adhered to the second sidewall of the polarizer 20 to fix the two display modules 10 to the polarizer 20. At this time, the first sidewall and the second sidewall of the polarizer 20 are in close contact with the side of the display module 10 through bonding, which reduces light leakage, ensures uniform light distribution at the splicing part of the entire display screen 100, and improves the final visual display effect.

[0057] Of course, the first sidewall and the second sidewall can also be attached to the side of the display module 10 by other connection methods.

[0058] Please refer to Figure 5 , in some embodiments, an installation groove is provided at the splicing part of adjacent display modules 10. The installation groove extends along the splicing gap 111 of the adjacent display modules 10, and the polarizer 20 is received and fixed in the installation groove.

[0059] Specifically, a groove extending along its second direction is provided at the edge of each display module 10, and the groove forms a substrate cross-section 112 on the surface of the PCB substrate 11. When two display modules 10 are butted along the first direction, a splicing gap 111 is formed between the PCB substrates 11 of the adjacent display modules 10. And the substrate cross-section 112 of the groove constitutes the formed installation groove. The size and shape of the installation groove are the same as those of the polarizer 20. After the two display modules 10 are spliced, the polarizer 20 is filled in the installation groove, so that the first sidewall and the second sidewall are in close contact with the side of the display module 10 to achieve attachment.

[0060] As Figure 5 shown, the inlay design of the polarizer 20 ensures the stability of its connection and prevents displacement or detachment during use. In addition, the inlay design also simplifies the installation process of the polarizer 20, which does not require additional bonding materials. At this time, the polarizer 20 can be a polarizer only having a polyvinyl alcohol layer 21 and a triacetyl cellulose layer 22, which can further reduce the thickness of the polarizer 20 while ensuring precise fit between the polarizer 20 and the display module 10, and improve the overall visual effect of the display screen 100.

[0061] In some embodiments, the distance between the first sidewall and the second sidewall of the polarizer 20 is less than the pitch between adjacent pixel units 12.

[0062] Specifically, the thickness of the polarizer 20 needs to be smaller than the spacing between the pixel units 12, so that after the two display modules 10 and the polarizer 20 are spliced together, the distance between the outermost pixel unit 12 of each display module 10 and the outermost pixel unit 12 of the other display module 10 is the same as the distance between its own pixel unit 12, thereby ensuring that the clarity of the display at the splicing point does not change and does not interfere with the normal display of the display screen 100.

[0063] In some embodiments, the polarizer 20 is disposed between adjacent display modules 10 ; the top surface of the polarizer 20 is flush with the top surface of the packaging layer 13 away from the PCB substrate 11 .

[0064] Specifically, the top surface of the polarizer 20 is flush with the top surface of the packaging layer 13 away from the PCB substrate 11, ensuring the overall flatness of the display screen 100 without local protrusions or depressions, effectively avoiding light deviation or color unevenness caused by surface unevenness, and ensuring the visual consistency of the display screen 100 at a wide viewing angle.

[0065] In some embodiments, the extended length of the polarizer 20 is greater than or equal to the length of the display module 10 , so that the polarizer 20 can cover the entire side surface of the display module 10 .

[0066] Specifically, the polarizer 20 fully covers the side elevations of the spliced modules, which can effectively avoid color distortion caused by uneven light. It ensures that the polarizer 20 can fully exert its optical adjustment function at the module splicing point, so as to completely eliminate the green and yellow lines at the splicing point.

[0067] In summary, this embodiment provides a display screen 100, which sets a polarizer 20 between two adjacent display modules 10. The polarizer 20 can be used to weaken or enhance at least one of the three primary colors of light, so that the polarizer 20 can harmonize the intensity of the three primary colors of light at the splicing point of the adjacent display modules 10, so that the light intensity ratio of the adjacent display modules 10 at the splicing point is appropriate, so as to eliminate the blue line or yellow line between the adjacent display modules 10, avoid the display defects of the small-pitch LED display module 10, improve the consistency of the product display effect, and improve the customer's usage experience.

[0068] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A display screen, characterized in that, Comprising: A plurality of display modules are provided and are spliced in sequence. A polarizer is provided between two adjacent display modules. The polarizer includes a first side wall and a second side wall which are oppositely arranged, and the first side wall and the second side wall face the adjacent display modules respectively. The first side wall is attached to the side surface of one display module, and the second side wall is attached to the side surface of another adjacent display module.

2. The display screen according to claim 1, characterized in that, The first side wall and the second side wall are adhesively bonded to the side surface of the display module.

3. The display screen according to claim 1, characterized in that An installation groove is formed at the splicing position of adjacent display modules. The installation groove extends along the splicing gap of adjacent display modules, and the polarizer is fixed in the installation groove.

4. The display screen according to claim 1, characterized in that, The display module includes a PCB substrate and a plurality of pixel units. The plurality of pixel units are evenly spaced on the PCB substrate; the distance between adjacent pixel units is less than or equal to 0.9 mm.

5. The display screen according to claim 4, wherein, Each pixel unit includes three LED chips of red, green, and blue which are spaced along a first direction and are used to emit red light, green light, and blue light respectively; the polarizer extends along a second direction perpendicular to the first direction and is used to weaken or enhance the light intensity of at least one of red light, green light, and blue light.

6. The display screen according to claim 4, wherein The distance between the first side wall and the second side wall of the polarizer is less than the distance between adjacent pixel units.

7. The display screen according to claim 4, wherein The display module further includes a packaging layer which covers the PCB substrate; The polarizer is provided between adjacent display modules; the top surface of the polarizer is flush with the top surface of the packaging layer away from the PCB substrate.

8. The display screen according to claim 1, characterized in that The extension length of the polarizer is greater than or equal to the length of the display module so that the polarizer can cover the entire side surface of the display module.

9. The display screen according to claim 1, wherein The polarizer includes a polyvinyl alcohol layer and triacetyl cellulose layers provided on both sides thereof.

10. The display screen according to claim 9, wherein, The polarizer further includes a protective film layer, a pressure-sensitive adhesive layer, and a release film layer; the protective film layer is provided on the outer side surface of one triacetyl cellulose layer; the pressure-sensitive adhesive layer and the release film layer are provided on the outer side surface of the other triacetyl cellulose layer.

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