Display module

Abstract

The utility model relates to a display module. The display module comprises at least two first display units and at least one second display unit which are spliced, each first display unit comprises a backlight module, a display panel and a cover plate, and each display panel comprises a display part and a non-display part; the second display unit covers an abutted seam between two adjacent first display units and the edge of the display panel; the surface of the side, away from the backlight module, of the second display unit is flush with the surface of the side, away from the backlight module, of the cover plate, the side wall of the second display unit abuts against the side wall of the cover plate, and the second display unit covers the edge of the display part. The second display unit is arranged between the adjacent cover plates, the upper surface of the second display unit is flush with the upper surfaces of the cover plates, the second display unit covers the edge of the display part, the display part covered by the second display part can emit light normally, and light is emitted through the cover plates. Therefore, shadows at the splicing position of the first display unit and the second display unit are avoided.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display module. Background Technology

[0002] Currently, the market size of MLCD splicing display products is growing year by year. MLCD splicing display products refer to a display technology that splices LED panels (Light Emitting Diodes) between adjacent LCD panels (Liquid Crystal Display). MLCD technology can achieve seamless splicing.

[0003] However, there is a shadow problem at the splicing point between the LCD panel and the LED panel. This problem seriously affects the overall splicing image quality and restricts the application of MLCD splicing display products in the high-end indoor market, such as broadcasting and media, big data centers, conference markets, and teaching modules.

[0004] Therefore, it is urgent to solve the above-mentioned technical problems. Utility Model Content

[0005] This application provides a display module to solve the technical problem of shadows at the splicing points of splicing display products.

[0006] To achieve the above objectives, this application provides a display module, comprising at least two first display units and at least one second display unit spliced ​​together, wherein the first display unit includes:

[0007] Backlight module;

[0008] A display panel is disposed on one side of the light-emitting surface of the backlight module, and the display panel includes a display part and a non-display part disposed around the display part;

[0009] A cover plate is disposed on the side of the display panel opposite to the backlight module;

[0010] The second display unit is disposed on the side of the display panel away from the backlight module, and the second display unit covers the seam between two adjacent first display units and the edge of the display panel; the surface of the second display unit away from the backlight module is flush with the surface of the cover plate away from the backlight module, the sidewall of the second display unit abuts against the sidewall of the cover plate, and the second display unit covers the edge of the display section.

[0011] Optionally, the backlight module includes a light-emitting part and a frame part disposed around the light-emitting part, wherein the width of the frame part adjacent to the second display unit is W;

[0012] The distance between the side surface of the cover plate facing away from the backlight module and the light-emitting surface of the backlight module is the first distance Y1;

[0013] The overlap width between the first display unit and the second display unit is a first width S;

[0014] Where S≥W+Y1*tanθ1, θ1≥60 degrees.

[0015] Optionally, the distance between the side surface of the cover plate facing away from the backlight module and the side surface of the display panel close to the backlight module is a second distance Y2;

[0016] The distance between the surface of the display panel near the backlight module and the light-emitting surface of the backlight module is the third distance Y3;

[0017] The refractive index of the material between the side surface of the cover plate facing away from the backlight module and the side surface of the display panel close to the backlight module is n1;

[0018] The refractive index of the material between the side surface of the display panel near the backlight module and the light-emitting surface of the backlight module is n2;

[0019] Where S≥W+Y2*tan(arcsin(n1*sinθ1 / n2))+Y3*tanθ1, θ1≥60 degrees.

[0020] Optionally, the backlight module includes a back plate and a light source assembly. The back plate includes a base plate and a side plate disposed around the base plate. The base plate and the side plate form a receiving cavity. The light source assembly is disposed in the receiving cavity. The light emitting surface of the backlight module is the surface of the light source assembly facing away from the back plate.

[0021] Optionally, the side panel has a frame at its edge, the frame covering the edge of the light source assembly, and the width of the frame portion is the distance between the side wall of the backlight module and the side wall of the frame near the light source assembly in the splicing direction.

[0022] Optionally, the area of ​​the light-emitting part is larger than the area of ​​the display part, and in the splicing direction, the display panel does not extend beyond the edge of the backlight module.

[0023] Optionally, the backlight module includes a first adhesive portion disposed on the side of the frame away from the base plate, the first adhesive portion being used to bond the display panel and the frame.

[0024] Optionally, the light source assembly includes:

[0025] Multiple LED beads are disposed on the side surface of the base plate near the display panel;

[0026] The distance between the light-emitting center of the lamp bead adjacent to the side plate and the side plate is less than or equal to 5 mm.

[0027] Optionally, the display panel includes a first substrate and a second substrate that are opposite to each other and spaced apart. The first substrate is disposed on the side of the second substrate away from the backlight module. A first polarizer is disposed between the first substrate and the cover plate, and a second polarizer is disposed between the second substrate and the backlight module.

[0028] In the splicing direction, the distance between the sidewall of the first polarizer and the sidewall of the first substrate is greater than the distance between the sidewall of the second polarizer and the sidewall of the first substrate.

[0029] Optionally, the display panel includes a second adhesive portion disposed on the surface of the first substrate facing away from the second substrate. The second adhesive portion adheres to the second display unit and the first substrate, and the second adhesive portion overlaps with both the display portion and the non-display portion.

[0030] In the display module of this application embodiment, by placing the second display unit between adjacent cover plates, and making the upper surface of the second display unit flush with the upper surface of the cover plate, the second display unit covers the edge of the display section, and the display section covered by the second display section can emit light normally, and the light is emitted through the cover plate, thereby avoiding the presence of shadows at the splicing point of the first display unit and the second display unit.

[0031] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0034] Figure 1 This is a top view of a display module provided in an exemplary embodiment of this disclosure;

[0035] Figure 2 yes Figure 1Schematic diagram of the cross-sectional structure at point CC;

[0036] Figure 3 yes Figure 2 The diagram showing the enlarged portion of the structure illustrates the calculation of the first width in the first scenario.

[0037] Figure 4 yes Figure 2 The enlarged structural diagram shows the calculation of the first width in the second case;

[0038] Figure 5 This application provides a comparative example and an embodiment of the display screen effect comparison.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Display module;

[0041] 10 - First display unit;

[0042] 11-Backlight module; 111-Light-emitting part; 112-Frame part; 113-Back plate; 1131-Bottom plate; 1132-Side plate; 114-Light source assembly; 1141-LED bead; 1142-Optical film; 1143-Substrate; 115-First adhesive part; 116-Frame;

[0043] 12-Display panel; 121-Display section; 122-Non-display section; 123-First substrate; 124-Second substrate; 125-First polarizer; 126-Second polarizer; 127-Second adhesive section;

[0044] 13-Cover plate;

[0045] 20 - Second display unit;

[0046] Y1 - First spacing; Y2 - Second spacing; Y3 - Third spacing;

[0047] S - First width;

[0048] W - Width of the border portion 112;

[0049] 11a - The light-emitting surface of the backlight module 11;

[0050] The distance between the light-emitting center of L-LED 1141 and the side plate 1132. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0052] To achieve the above objectives, this application provides a display module 1, such as... Figures 1 to 4 As shown, the display includes at least two first display units 10 and at least one second display unit 20 spliced ​​together. The first display unit 10 includes a backlight module 11, a display panel 12, and a cover plate 13. The display panel 12 is disposed on one side of the light-emitting surface 11a of the backlight module 11. The display panel 12 includes a display part 121 and a non-display part 122 disposed around the display part 121. The cover plate 13 is disposed on the side of the display panel 12 away from the backlight module 11. The second display unit 20 is disposed on the side of the display panel 12 away from the backlight module 11. The second display unit 20 covers the seam between two adjacent first display units 10 and the edge of the display panel 12. The surface of the second display unit 20 away from the backlight module 11 is flush with the surface of the cover plate 13 away from the backlight module 11. The sidewall of the second display unit 20 abuts against the sidewall of the cover plate 13. The second display unit 20 covers the edge of the display part 121.

[0053] Display module 1 is an MLCD splicing display product. The first display unit 10 can be an LCD panel, and the second display unit 20 can be an LED panel, a Mini LED panel, a Micro LED panel, etc. By setting the second display unit 20 at the splicing seam, the MLCD splicing display product can eliminate the obvious seams in traditional splicing screens and improve the visual effect.

[0054] like Figure 1 and Figure 2 As shown, the display module 1 includes at least two first display units 10 spliced ​​together and at least one second display unit 20. That is to say, the display module 1 includes at least two first display units 10 and one second display unit 20. The second display unit 20 is disposed at the seam between the two first display units 10. The display surfaces of the first display units 10 and the second display unit 20 both face the same side, that is, both face the audience.

[0055] like Figure 2As shown, the display panel 12 includes a display section 121 and a non-display section 122 disposed around the display section 121. The display section 121 has multiple sub-pixels, including red sub-pixels, green sub-pixels, blue sub-pixels, etc. The display section 121 can display an image. The non-display section 122 can be equipped with driving circuits, such as gate driving circuits.

[0056] The display panel 12 is an LCD panel. The LCD panel is a non-self-emissive panel and requires a backlight module 11 to provide a backlight source.

[0057] like Figure 2 As shown, the backlight module 11 can be a direct-lit backlight or an edge-lit backlight. The backlight module 11 has a light-emitting surface, which is planar. The area of ​​the light-emitting surface 11a of the backlight module 11 is at least larger than the area of ​​the display portion 121 of the display panel 12, thereby providing a backlight source for the entire display portion 121.

[0058] The second display unit 20 covers the seam between two adjacent display panels 12 and the edge of the display panel 12, and also covers the edge of the display section 121. This means that the edge of the display section 121 of the display panel 12 is blocked by the second display unit 20. Since the display section 121 blocked by the second display unit 20 can still emit light normally, when displaying an image, light can escape from the cover plate 13, thereby avoiding edge shadows.

[0059] The surface of the second display unit 20 facing away from the backlight module 11 is flush with the surface of the cover plate 13 facing away from the backlight module 11. In other words, the upper surface of the second display unit 20 is flush with the upper surface of the cover plate 13, so that the display screen of the display module 1 is on the same plane, improving the visual effect.

[0060] The sidewall of the second display unit 20 abuts against the sidewall of the cover plate 13. The sidewall of the second display unit 20 refers to the plane connecting the upper and lower surfaces of the second display unit 20. The upper surface of the second display unit 20 is the display surface, and the lower surface is opposite to the upper surface. The sidewall of the cover plate 13 refers to the plane connecting the upper and lower surfaces of the cover plate 13. The upper surface of the cover plate 13 is the display surface, and the upper and lower surfaces are opposite to each other. In other words, the cover plate 13 is provided on one side of the light-emitting surface of the display panel 12, and the second display unit 20 is positioned between two adjacent cover plates 13, with the second display unit 20 abutting against the cover plate 13.

[0061] The cover plate 13 can be made of materials such as glass or polyimide. The cover plate 13 can protect the display panel 12 and prevent the display panel 12 from being damaged by external impact.

[0062] Optionally, such as Figure 3As shown, the backlight module 11 includes a light-emitting part 111 and a frame part 112 disposed around the light-emitting part 111. The width of the frame part 112 adjacent to the second display unit 20 is W. The distance between the side surface of the cover plate 13 away from the backlight module 11 and the light-emitting surface 11a of the backlight module 11 is a first distance Y1. The overlap width between the first display unit 10 and the second display unit 20 is a first width S. Wherein, S≥W+Y1*tanθ1, θ1≥60 degrees.

[0063] The light-emitting part 111 refers to the area that can emit light, and the frame part 112 refers to the area that cannot emit light. The light-emitting part 111 and the frame part 112 are adjacent to each other. The light-emitting part 111 corresponds to the display part 121 of the display panel 12, and the frame part 112 corresponds to the non-display part 122.

[0064] In some embodiments, such as Figure 2 As shown, the area of ​​the light-emitting part 111 can be slightly larger than that of the display part 121, and the light-emitting part 111 is aligned with the display part 121, so that the light-emitting part 111 can provide a backlight for the entire display part 121. In the first display unit 10, the effective display area is the area of ​​the display part 121.

[0065] like Figure 3 As shown, the width W of the frame portion 112 adjacent to the second display unit 20 refers to the width of the frame portion 112 near the seam in the splicing direction. The second display unit 20 covers the seam and the display portions 121 on both sides. At the same time, the second display unit 20 also covers the edges of the frame portion 112 and the light-emitting portion 111.

[0066] like Figure 3 As shown, the distance between the side surface of the cover plate 13 facing away from the backlight module 11 and the light-emitting surface 11a of the backlight module 11 is the first distance Y1. The side surface of the cover plate 13 facing away from the backlight module 11 is the upper surface of the cover plate 13, and the light-emitting surface 11a of the backlight module 11 is the upper surface of the light-emitting part 111.

[0067] like Figure 3 As shown, the overlap width between a first display unit 10 and a second display unit 20 is a first width S, that is, the first width S is the size of the overlapping part of the first display unit 10 and the second display unit 20 on one side in the splicing direction.

[0068] The inventors of this application discovered that the shadow at the splicing point is mainly due to dark objects at the junction of the light-emitting part 111 and the frame part 112 of the backlight module 11. These dark objects are non-light-emitting materials of the frame part 112. Figure 3As shown, when the human eye views the displayed image, if the refraction of light between media with different refractive indices is not considered, a shadow will appear when the human eye observes the edge of the light-emitting part 111 from the edge of the second display unit 20. In other words, when the human eye observes the frame part 112 from the edge of the second display unit 20, a shadow will be observed because the frame part 112 does not emit light. By increasing the first width S, the light-emitting part 111 can be seen from the edge of the second display unit 20, thus avoiding the appearance of a shadow.

[0069] Since the length of the light-emitting portion 111 covered by the second display unit 20 depends on the first spacing Y1, that is, the length of the light-emitting portion 111 covered by the second display unit 20 is Y1*tanθ1, where θ1 is the angle between the line of sight of the human eye and the normal direction of the cover plate 13 when viewing the display screen. Because the human eye is more likely to observe shadows when looking from the side, θ1 is set to ≥60 degrees. Therefore, the critical value for the human eye to observe shadows from the edge of the second display unit 20 can be derived as W+Y1*tanθ1. By setting the first width S to be greater than or equal to W+Y1*tanθ1, the observation of shadows by the human eye when looking from the side can be avoided.

[0070] Optionally, such as Figure 4 As shown, the distance between the side surface of the cover plate 13 facing away from the backlight module 11 and the side surface of the display panel 12 near the backlight module 11 is the second distance Y2; the distance between the side surface of the display panel 12 near the backlight module 11 and the light-emitting surface 11a of the backlight module 11 is the third distance Y3; the refractive index of the material between the side surface of the cover plate 13 facing away from the backlight module 11 and the side surface of the display panel 12 near the backlight module 11 is n1; the refractive index of the material between the side surface of the display panel 12 near the backlight module 11 and the light-emitting surface 11a of the backlight module 11 is n2; where S≥W+Y2*tan(arcsin(n1*sinθ1 / n2))+Y3*tanθ1, θ1≥60 degrees.

[0071] When considering that the materials between the side surface of the cover plate 13 facing away from the backlight module 11 and the light-emitting surface 11a of the backlight module 11 have different refractive indices, a more accurate first width S can be determined based on the refraction of light in materials with different refractive indices.

[0072] like Figure 4As shown, there is air on the upper surface of the cover plate 13, and air between the lower surface of the display panel 12 and the light-emitting part 111 of the backlight module 11. Therefore, light will be refracted at the upper surface of the cover plate 13 and at the lower surface of the display panel 12. Here, θ1 is the angle between the line of sight of the human eye and the normal direction of the cover plate 13 when viewing the display image, i.e., the angle of incidence, and θ2 is the angle of refraction. Since the medium above the cover plate 13 and below the display panel 12 is air, according to the principle of reversibility of light paths, θ2 is also the angle of incidence of light at the lower surface of the display panel 12, and θ1 is also the angle of refraction of light at the lower surface of the display panel 12. Since the human eye can more easily observe shadows when looking from the side, θ1 is set to ≥60 degrees.

[0073] According to the principles of optics, we can obtain n1*sinθ1=n2*sinθ2, that is, θ2=arcsin(n1*sinθ1 / n2).

[0074] Therefore, the critical value at which the human eye observes a shadow from the edge of the second display unit 20 can be determined as W + Y² * tanθ² + Y³ * tanθ¹ = W + Y² * tan(arcsin(n₁ * sinθ¹ / n₂)) + Y³ * tanθ¹. By setting the first width S to be greater than or equal to W + Y² * tan(arcsin(n₁ * sinθ¹ / n₂)) + Y³ * tanθ¹, the human eye can avoid observing a shadow when looking from the side.

[0075] Optionally, such as Figure 2 As shown, the backlight module 11 includes a back plate 113 and a light source assembly 114. The back plate 113 includes a base plate 1131 and a side plate 1132 disposed around the base plate 1131. The base plate 1131 and the side plate 1132 form a receiving cavity. The light source assembly 114 is disposed in the receiving cavity. The light emitting surface 11a of the backlight module 11 is the side surface of the light source assembly 114 facing away from the back plate 113.

[0076] The backlight material can be metal, such as aluminum or stainless steel. The side plate 1132 and the bottom plate 1131 form a box-shaped structure, and the box-shaped structure has a receiving cavity inside. The light source assembly 114 is disposed in the receiving cavity.

[0077] In some embodiments, such as Figure 2 As shown, the backlight module 11 can be a direct-lit backlight. In a direct-lit backlight, the light source assembly includes a lamp board, a reflector, and an optical film, with the optical film disposed on the side of the lamp board facing away from the base plate. The lamp board includes a substrate 1143 and a plurality of LEDs 1141 disposed on the substrate 1143. The plurality of LEDs 1141 are distributed on the bearing surface of the substrate 1143, with the light-emitting surface of the LEDs 1141 facing the display panel 12. The lamp board is disposed within a receiving cavity.

[0078] A reflector can be disposed on the substrate 1143 to reflect the light emitted by the lamp bead 1141, and an optical film 1142 is disposed on the side of the lamp bead away from the base plate 1131.

[0079] The optical film 1142 may include diffuser sheets, prism sheets, etc., stacked in sequence. The diffuser sheet is used to diffuse the light emitted from the LED beads, so that the light is evenly distributed on the light-emitting surface and effectively homogenizes the light. The prism sheet is set on the side of the diffuser sheet away from the LED beads. The prism sheet corrects the direction of the light through the principle of light refraction and reflection, and concentrates the scattered light towards the front, thereby improving the brightness of the backlight module 11.

[0080] In some embodiments, the backlight module 11 can be an edge-lit backlight. The difference between an edge-lit backlight and a direct-lit backlight lies in the lamp panel. In an edge-lit backlight, the light source assembly 114 can include a reflective sheet, a light guide plate, and an optical film 1142 stacked sequentially. A light strip can be provided on one side wall of the light guide plate, and the light strip includes multiple LEDs 1141, which can be LEDs, etc. Light emitted from the LEDs 1141 is incident on the side wall of the light guide plate, and conducted through the light guide plate to the entire plane of the light guide plate, thereby forming a planar light source. The material of the light guide plate can be a transparent polymer material, such as polymethyl methacrylate (PMMA) or polycarbonate (PC), etc.

[0081] A reflective sheet is disposed on the side of the light guide plate near the base plate 1131. The reflective sheet is mainly used to reflect the light emitted from the bottom of the light guide plate back into the light guide plate, so that it can be concentrated and projected from the front, reducing light loss and increasing the light source efficiency of the backlight module 11. An optical film 1142 is disposed on the side of the light guide plate away from the base plate 1131. The optical film 1142 may include diffuser sheets, prism sheets, etc., stacked in sequence.

[0082] Optionally, in some embodiments, a reflective strip can be provided on the side wall of the light guide plate that is not provided with a light strip. The reflective strip is used to reflect the light emitted from the side of the light guide plate, so that it can be concentrated and projected from the front, further reducing light loss and increasing the light source efficiency of the backlight module 11.

[0083] The light-emitting surface 11a of the backlight module 11 refers to the side surface of the optical film 1142 that faces away from the base plate 1131. The light-emitting surface 11a of the backlight module 11 is correspondingly provided to the display unit 121, which means that the backlight module 11 can provide a planar light source for at least the entire display unit 121.

[0084] Optionally, such as Figure 2 As shown, a frame 116 is provided on the edge of the side panel 1132, and the frame 116 covers the edge of the light source assembly 114. The width W of the frame portion 112 is the distance between the side wall of the backlight module 11 and the side wall of the frame 116 near the light source assembly 114 in the splicing direction.

[0085] The frame 116 is used to fix the light source assembly 114 of the backlight module 11, ensuring the structural stability of the backlight module 11, and also playing a certain role in light shielding and protection.

[0086] In some embodiments, the frame 116 may be made of materials such as plastic. The frame 116 may be integrally molded using an injection molding process.

[0087] like Figure 2 As shown, the frame 116 includes, but is not limited to, components that can be snapped into and connected to the side panel 1132. One end of the frame 116 near the display panel 12 can extend into the receiving cavity of the back panel 113 and overlap with the edge of the optical film 1142, thereby fixing the optical film 1142 and preventing the optical film 1142 from coming out of the back panel 113.

[0088] The light-emitting part 111 is the area of ​​the optical film 1142 that is not obscured by the frame 116, and the frame part 112 is the area excluding the light-emitting part 111. The width W of the frame part 112 is the distance between the side wall of the backlight module 11 and the edge of the frame 116 near the light-emitting part 111. The side wall of the backlight module 11 refers to the outermost surface of the backlight module 11, that is, the side wall of the backlight module 11 near the seam.

[0089] Optionally, such as Figure 2 As shown, the area of ​​the light-emitting part 111 is larger than the area of ​​the display part 121.

[0090] In the splicing direction, the display panel 12 does not extend beyond the edge of the backlight module 11. That is to say, the sidewall of the display panel 12 is recessed relative to the sidewall of the backlight module 11.

[0091] Optionally, the backlight module 11 includes a first adhesive portion 115 disposed on the side of the frame 116 away from the base plate 1131, the first adhesive portion 115 being used to bond the display panel 12 and the frame 116.

[0092] The material of the first adhesive part 115 can be foam adhesive, pressure-sensitive adhesive, or other similar materials.

[0093] Optionally, such as Figure 3 and Figure 4 As shown, the backlight module 11 is a direct-lit backlight. The light source assembly 114 includes a plurality of LED beads 1141, which are disposed on the side surface of the base plate 1131 near the display panel 12; wherein the distance L between the light-emitting center of the LED bead 1141 adjacent to the side plate 1132 and the side plate 1132 is less than or equal to 5 mm.

[0094] The LED chip 1141 can be an LED, Mini LED, Micro LED, etc. The LED chips 1141 can be distributed approximately evenly on the surface of the base plate 1131. After the light emitted by the LED chips 1141 is adjusted by the optical film 1142, it can have high uniformity and brightness.

[0095] A certain distance can be set between the LED 1141 and the optical film 1142. This distance is called the light mixing distance. By setting the light mixing distance, the light incident on the optical film 1142 by the LED 1141 can be more uniform, thereby improving the light output uniformity of the backlight module 11.

[0096] The inventors of this application discovered that in direct-lit backlighting, when the distance between the LED chip 1141 and the side plate 1132 is large, the edges of the light-emitting portion 111 of the backlight module 11 become darker, which exacerbates poor shadow quality. Therefore, by reducing the distance between the LED chip 1141 and the side plate 1132, shadow quality can be improved. The smaller the distance between the LED chip 1141 and the side plate 1132, the more the poor shadow quality is reduced.

[0097] In some embodiments, such as Figure 2 As shown, the distance L between the light-emitting center of the LED 1141 and the side plate 1132 is less than or equal to 5 mm. For example, the distance L between the light-emitting center of the LED 1141 and the side plate 1132 is 5 mm, 4.5 mm, 4 mm, 3.5 mm, etc., but is not limited to these.

[0098] Optionally, such as Figure 2 As shown, the display panel 12 includes a first substrate 123 and a second substrate 124 that are opposite to each other and spaced apart. The first substrate 123 is disposed on the side of the second substrate 124 away from the backlight module 11. A first polarizer 125 is disposed between the first substrate 123 and the cover plate 13, and a second polarizer 126 is disposed between the second substrate 124 and the backlight module 11. In the splicing direction, the distance between the sidewall of the first polarizer 125 and the sidewall of the first substrate 123 is greater than the distance between the sidewall of the second polarizer 126 and the sidewall of the first substrate 123.

[0099] In some embodiments, the materials of the first substrate 123 and the second substrate 124 may be glass or the like.

[0100] A liquid crystal layer (not shown) is disposed between the first substrate 123 and the second substrate 124. By applying different electric fields to the liquid crystal molecules in the liquid crystal layer, their orientation is changed, thereby controlling the light transmittance of the display panel 12, and thus controlling the brightness of the displayed image. A color filter layer is disposed on either the first substrate 123 or the second substrate 124. The color filter layer can convert white light into colored light, thereby presenting a color image.

[0101] like Figure 2As shown, a first polarizer 125 is disposed between the first substrate 123 and the cover plate 13, and a second polarizer 126 is disposed between the second substrate 124 and the backlight module 11. The second polarizer 126 can convert the light emitted from the backlight module 11 into polarized light. After the polarized light is incident on the liquid crystal layer, the liquid crystal molecules change their alignment under the action of an electric field, which causes the polarization direction of the polarized light passing through it to change. In this way, by controlling the state of the liquid crystal molecules, it is possible to control whether the polarized light can pass through the first polarizer 125, thereby achieving light modulation and realizing the purpose of displaying images.

[0102] like Figure 2 As shown, in the splicing direction, the distance between the sidewall of the first polarizer 125 and the sidewall of the first substrate 123 is greater than the distance between the sidewall of the second polarizer 126 and the sidewall of the first substrate 123. This means that at the splice seam, the distance between two adjacent first polarizers 125 is greater than the distance between two adjacent second polarizers 126. This arrangement increases the space between the second display unit 20 and the first substrate 123, facilitating the arrangement of other structures, such as adhesive materials.

[0103] Optionally, such as Figure 2 As shown, the display panel 12 includes a second adhesive portion 127 disposed on the surface of the first substrate 123 facing away from the second substrate 124. The second adhesive portion 127 adhesively bonds the second display unit 20 and the first substrate 123. The second adhesive portion 127 overlaps with both the display portion 121 and the non-display portion 122, thereby increasing the adhesive area of ​​the second adhesive portion 127 and improving the bonding reliability between the second display unit 20 and the first substrate 123.

[0104] The second adhesive part 127 can be foam adhesive, pressure-sensitive adhesive, etc., but is not limited to these.

[0105] The second adhesive portion 127 adheres to the second display unit 20 and the first substrate 123, thereby fixing the second display unit 20 to the first display unit 10 and preventing the second display unit 20 from falling off.

[0106] In this embodiment, the display module 1 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0107] like Figure 5 As shown, Figure 5This application provides a comparison of a comparative example and an embodiment of a shadow photograph. (a) shows the display screen of the comparative example, and (b) shows the display screen of an embodiment of this application. The boxed areas represent the stitching areas. In (a), shadows are visible at the stitching areas, and the brightness of the shadowed areas is significantly lower than that of other areas. Compared to (a), there are no obvious shadows at the stitching areas in (b), thus improving the shadow quality. By improving the shadow quality, the display effect of the display module can be enhanced.

[0108] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0109] 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.

[0110] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0111] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module, characterized in that, It includes at least two first display units and at least one second display unit spliced ​​together, wherein the first display unit includes: Backlight module; A display panel is disposed on one side of the light-emitting surface of the backlight module, and the display panel includes a display part and a non-display part disposed around the display part; A cover plate is disposed on the side of the display panel opposite to the backlight module; The second display unit is disposed on the side of the display panel away from the backlight module, and the second display unit covers the seam between two adjacent first display units and the edge of the display panel; the surface of the second display unit away from the backlight module is flush with the surface of the cover plate away from the backlight module, the sidewall of the second display unit abuts against the sidewall of the cover plate, and the second display unit covers the edge of the display section.

2. The display module according to claim 1, characterized in that, The backlight module includes a light-emitting part and a frame part disposed around the light-emitting part, wherein the width of the frame part adjacent to the second display unit is W; The distance between the surface of the cover plate facing away from the backlight module and the light-emitting surface of the backlight module is the first distance (Y1). The overlap width between the first display unit and the second display unit is the first width (S); Where S≥W+Y1*tanθ1, θ1≥60 degrees.

3. The display module according to claim 2, characterized in that, The distance between the side surface of the cover plate away from the backlight module and the side surface of the display panel close to the backlight module is the second distance (Y2). The distance between the surface of the display panel near the backlight module and the light-emitting surface of the backlight module is the third distance (Y3). The refractive index of the material between the side surface of the cover plate facing away from the backlight module and the side surface of the display panel close to the backlight module is n1; The refractive index of the material between the side surface of the display panel near the backlight module and the light-emitting surface of the backlight module is n2; Where S≥W+Y2*tan(arcsin(n1*sinθ1 / n2))+Y3*tanθ1, θ1≥60 degrees.

4. The display module according to claim 2 or 3, characterized in that, The backlight module includes a back plate and a light source assembly. The back plate includes a base plate and a side plate disposed around the base plate. The base plate and the side plate form a receiving cavity. The light source assembly is disposed in the receiving cavity. The light emitting surface of the backlight module is the side surface of the light source assembly that faces away from the back plate.

5. The display module according to claim 4, characterized in that, The side panel has a frame at its edge, which covers the edge of the light source assembly. The width of the frame portion is the distance between the side wall of the backlight module and the side wall of the frame closest to the light source assembly in the splicing direction.

6. The display module according to claim 5, characterized in that, The area of ​​the light-emitting part is larger than the area of ​​the display part, and in the splicing direction, the display panel does not extend beyond the edge of the backlight module.

7. The display module according to claim 5, characterized in that, The backlight module includes a first adhesive portion disposed on the side of the frame away from the base plate, the first adhesive portion being used to bond the display panel and the frame.

8. The display module according to claim 4, characterized in that, The light source assembly includes: Multiple LED beads are disposed on the side surface of the base plate near the display panel; The distance between the light-emitting center of the LED adjacent to the side plate and the side plate is less than or equal to 5 mm.

9. The display module according to claim 1, characterized in that, The display panel includes a first substrate and a second substrate that are opposite to each other and spaced apart. The first substrate is disposed on the side of the second substrate away from the backlight module. A first polarizer is disposed between the first substrate and the cover plate, and a second polarizer is disposed between the second substrate and the backlight module. In the splicing direction, the distance between the sidewall of the first polarizer and the sidewall of the first substrate is greater than the distance between the sidewall of the second polarizer and the sidewall of the first substrate.

10. The display module according to claim 9, characterized in that, The display panel includes a second adhesive portion disposed on the surface of the first substrate facing away from the second substrate. The second adhesive portion adheres to the second display unit and the first substrate. The second adhesive portion overlaps with both the display portion and the non-display portion.

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