Display module

Abstract

The invention discloses a display module. The display module comprises a display panel, a polaroid layer, a flexible circuit board and a first black shading layer. The display panel comprises a first substrate, a display unit layer, an array circuit layer and a second substrate, wherein the display unit layer is arranged on the first substrate; the array circuit layer is arranged on the first substrate; the second substrate covers the display unit layer; the polaroid layer is arranged on the side, away from the display unit layer, of the second substrate, and the outer edge of the polaroid layer protrudes out of the outer edge of the second substrate. One end of the flexible circuit board is arranged on the first substrate and is electrically connected with the array circuit layer; the first black shading layer is arranged on the side, facing the first substrate, of the polaroid layer, and the side, facing the first substrate, of the first black shading layer makes contact with part of the flexible circuit board. According to the display module, the first black shading layer is used for performing auxiliary fixation on the flexible circuit board, so that electric connection disconnection between the flexible circuit board and the array circuit layer caused by mechanism interference in the process of assembling the display module is avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module. Background Art

[0002] like Figure 1 and Figure 2 As shown, the conventional OLED (Organic Light Emitting Diode) display module 080 includes a back panel 01 (bottom panel 011, side panel 012, front frame 013), a support panel 02, a control circuit board 03, a substrate 04, and a bending circuit board 05 (bending portion 051). The array circuit layer is arranged by laying out the GOA (Gate on array) circuit in the non-display area 070 around the display area 060, the array circuit layer and the control circuit board 03 are connected by a flexible circuit board 05, and the array circuit layer is shielded by the front frame 013 of the back panel 01. This module structure for shielding the wiring has the following problems: the flexible circuit board 05 electrically connected to the array circuit layer is exposed, and during the assembly of the display module 080, there is a high probability of mechanical interference with the side panel 012 of the back panel 01 and the front frame 013 on the side panel 012, and the mechanical interference will cause the electrical connection between the flexible circuit board 05 and the array circuit layer to be disconnected. Summary of the invention

[0003] The embodiments of the present application provide a display module to improve the fixing strength of a flexible circuit board and avoid the problem of electrical connection failure of the flexible circuit board.

[0004] An embodiment of the present application provides a display module, the display module comprising:

[0005] A display panel, comprising a display area and a non-display area, wherein the non-display area at least partially surrounds the display area, and the display panel comprises:

[0006] a first substrate;

[0007] A display unit layer, wherein the display unit layer is disposed on the first substrate and is located in the display area;

[0008] an array circuit layer, the array circuit layer being disposed on the first substrate and located in the non-display area; and

[0009] a second substrate, wherein the second substrate covers the display unit layer;

[0010] A polarizer layer, wherein the polarizer layer is disposed on a side of the second substrate away from the display unit layer, and an outer edge of the polarizer layer protrudes from an outer edge of the second substrate;

[0011] a flexible circuit board, one end of which is disposed on the first substrate and is electrically connected to the array circuit layer; and

[0012] A first black light shielding layer is disposed on a side of the polarizer layer facing the first substrate, and a side of the first black light shielding layer facing the first substrate is in contact with a portion of the flexible circuit board.

[0013] Furthermore, the display module also includes a second black shading layer, which is arranged between the second substrate and the polarizer layer and located in the non-display area, and the thickness of the second black shading layer is less than the thickness of the first black shading layer.

[0014] Furthermore, the orthographic projection of the second black light-shielding layer on the first substrate covers the orthographic projection of the edge of the display unit layer on the first substrate.

[0015] Furthermore, the second black light-shielding layer is disposed on a side of the first black light-shielding layer close to the display area and is in contact with the first black light-shielding layer.

[0016] Furthermore, the product of the light transmittance of the first black light shielding layer and the thickness of the first black light shielding layer is equal to the product of the light transmittance of the second black light shielding layer and the thickness of the second black light shielding layer.

[0017] Furthermore, the orthographic projection of the second black light shielding layer on the first substrate covers the array circuit layer disposed on the first substrate.

[0018] Furthermore, the distance that the edge of the polarizer layer on one side close to the flexible circuit board exceeds the edge of the second substrate on the corresponding side is greater than the distance that the edge of the polarizer layer on the other side exceeds the edge of the second substrate on the corresponding side.

[0019] Furthermore, the flexible circuit board is arranged on a first side edge of the display panel, the display module includes a side sealant, the side sealant is arranged on the side walls of other sides of the display panel except the first side edge, and the surface of the side sealant facing away from the display panel protrudes from or is parallel to the outer edge of the polarizer layer.

[0020] Furthermore, the side sealant contacts a portion of the polarizer layer that extends beyond an outer edge of the second substrate, and the side sealant does not extend beyond a surface of the polarizer layer that is away from the display panel.

[0021] Furthermore, the display module also includes a supporting layer and a control circuit board, the supporting layer is arranged on the side of the display panel away from the polarizer layer, the other end of the flexible circuit board is bent to the side of the supporting layer away from the display panel and connected to the control circuit board, and the curvature radius of the bending area of ​​the flexible circuit board is less than or equal to 1 mm.

[0022] Beneficial effects of this application:

[0023] The present application provides a display module. Since a first black shading layer is arranged in a gap between the polarizer layer and the flexible circuit board, and the first black shading layer is in partial contact with the flexible circuit board, the first black shading layer can be used to assist in fixing the flexible circuit board, thereby avoiding the electrical connection between the flexible circuit board and the array circuit layer being disconnected due to mechanical interference during the assembly of the display module. In addition, the polarizer layer of the present application protrudes from the outer edge of the display panel. By arranging the first black shading layer on the part of the polarizer layer protruding from the display panel, the polarizer layer can be supported, the structural strength of the polarizer layer can be improved, and the risk of interference with the back panel causing breakage can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a display module in the related art;

[0025] Figure 2 yes Figure 1 A top view of a display module in FIG.

[0026] Figure 3 is a cross-sectional view of a display module in one embodiment of the present application;

[0027] Figure 4 It is a cross-sectional view of a display module in one embodiment of the present application in another direction.

[0028] 100-first substrate; 110-array circuit layer; 200-display unit layer; 300-second substrate; 400-polarizer layer; 510-first black shading layer; 520-second black shading layer; 530-side sealing glue; 610-flexible circuit board; 620-control circuit board; 700-support layer; 800-fixing layer; 900-back panel; 01-back panel; 011-bottom panel; 012-side panel; 013-front frame; 02-support panel; 03-control circuit board; 04-substrate; 05-flexible circuit board; 051-bending part of flexible circuit board; 060-display area; 070-non-display area; 080-display module. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0030] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0031] The embodiment of the present application provides a display module. Figure 3 and Figure 4 , the display module includes a display panel, a polarizer layer, a flexible circuit board and a first black shading layer. The display panel includes a display area and a non-display area, and the non-display area at least partially surrounds the display area. The display panel includes a first substrate, a display unit layer, an array circuit layer and a second substrate. The display unit layer is arranged on the first substrate and is located in the display area; the array circuit layer is arranged on the first substrate and is located in the non-display area; the second substrate covers the display unit layer. The polarizer layer is arranged on a side of the second substrate away from the display unit layer, and the outer edge of the polarizer layer protrudes from the outer edge of the second substrate; one end of the flexible circuit board is arranged on the first substrate and is electrically connected to the array circuit layer; the first black shading layer is arranged on a side of the polarizer layer facing the first substrate, and the side of the first black shading layer facing the first substrate is in contact with a part of the flexible circuit board.

[0032] The embodiment of the present application adopts a solution of setting the first black shading layer in the gap between the polarizer layer and the flexible circuit board, and the first black shading layer is in contact with part of the flexible circuit board. The first black shading layer can be used to assist in fixing the flexible circuit board, thereby avoiding the electrical connection between the flexible circuit board and the array circuit layer being disconnected due to mechanical interference during the assembly of the display module. In addition, the polarizer layer of the present application scheme protrudes from the outer edge of the display panel. By setting the first black shading layer on the part of the polarizer layer protruding from the display panel, it can support the polarizer layer, improve the structural strength of the polarizer layer, and avoid the risk of interference with the back panel and causing breakage.

[0033] The material of the first black light shielding layer 510 is required to be a material with a Shore hardness range of 60D to 100D, so as to avoid the hardness being too low to effectively support the polarizer layer 400, and to avoid the hardness being too high to easily scratch the flexible circuit board 610. Silicone, resin and other materials can be selected, and improved foaming materials can also be used instead. In order to allow the first black light shielding layer to better shield the flexible circuit board 610 and the array circuit layer 110, the shape of the first black light shielding layer 510 is preferably trapezoidal, and the optional shapes include but are not limited to square, elliptical, and amorphous. Its thickness is determined by the thickness of the second substrate 300, the display unit layer 200, and the flexible circuit board 610, and the thickness range is: 0.5mm to 1mm. For example, it can be set to 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm, 0.6mm, 0.62mm, 0.64mm, 0.66mm, 0.68mm, 0.7mm, 0.72mm, 0.74mm, 0.76mm, 0.78mm, 0.8mm, 0.82mm, 0.84mm, 0.86mm, 0.88mm, 0.9mm, 0.92mm, 0.94mm, 0.96mm, 0.98mm or 1mm, etc.

[0034] Specifically, refer to the embodiment of the present invention Figure 3 , Figure 4 , the display module in the present application further includes a side sealant 530, a support layer 700, a fixing layer 800, and a back plate 900. The fixing layer 800 is disposed on the back plate 900 to fix the support layer 700 and other components thereon; the first substrate 100 is disposed on the support layer 700, an array circuit layer 110 is disposed in the non-display area 070 on the first substrate 100, and a display unit layer 200 is disposed in the display area 060 on the first substrate 100, wherein the display unit layer 200 is connected to the flexible circuit board 610 through the array circuit layer 110; the second substrate 300 and the first substrate 100 are disposed on both sides of the display unit layer 200 respectively; the polarizer layer 400 is disposed on the second substrate 300, wherein the polarizer layer 400 protrudes from the four sides of the second substrate 300, and the distance of the edge of the polarizer layer 400 close to the flexible circuit board 610 on the side beyond the edge of the second substrate 300 on the corresponding side is greater than the distance of the edge of the polarizer layer 400 on the other side beyond the edge of the second substrate 300 on the corresponding side.

[0035] Specifically, if Figure 3 As shown, the distance that the edge of the polarizer layer 400 close to the flexible circuit board 610 exceeds the edge of the second substrate 300 on the corresponding side is S1. Figure 4As shown, the distance that the edge of the other side of the polarizer layer 400 exceeds the edge of the second substrate 300 on the corresponding side is S2. By setting S1 to be greater than S2, it can be ensured that the first black light-shielding layer 510 can completely block the flexible circuit board 610, and the supporting strength of the first black light-shielding layer 510 to the flexible circuit board 610 can be improved.

[0036] In this embodiment, reference Figure 3 , the orthographic projection of the display unit layer 200 on the first substrate 100 is smaller than the first substrate 100, so that the edge of the display unit layer 200 is spaced from the edge of the first substrate 100, so as to be used to set the array line layer 110. In order to shield the array line layer 110, the second substrate 300 in the embodiment of the present application is provided with a second black light shielding layer 520 in its non-display area 070 in the direction away from the display unit layer 200, and the orthographic projection of the second black light shielding layer on the first substrate 100 covers the array line layer 110 set on the first substrate 100. Specifically, the second black light shielding layer 520 is provided between the second substrate 300 and the polarizer layer 400, and is located on the side of the first black light shielding layer 510 close to the display area. By providing the second black light shielding layer 520 on the side of the first black light shielding layer 510 close to the display area, the second black light shielding layer 520 can be used to shield the array line layer 110.

[0037] Furthermore, the thickness of the second black light shielding layer 520 may be set smaller than the thickness of the first black light shielding layer 510 , so that the second black light shielding layer 520 with a smaller thickness can be sandwiched between the display panel and the polarizer, which facilitates the formation of the second black light shielding layer 520 .

[0038] Further, such as Figure 3 As shown, the orthographic projection of the second black light-shielding layer on the first substrate 100 covers the orthographic projection of the edge of the display unit layer 200 on the first substrate 100 , thereby ensuring the light-shielding effect of the second black light-shielding layer 520 .

[0039] Further, such as Figure 3 As shown, the first black light shielding layer 510 and the second black light shielding layer 520 are in contact in a direction parallel to the display module, which completely shields the array circuit layer 110 and the flexible circuit board 610 to prevent light leakage between the first black light shielding layer 510 and the second black light shielding layer 520.

[0040] When the second black light shielding layer 520 and the first black light shielding layer 510 are made of different materials, there is a color difference between the first black light shielding layer 510 and the second black light shielding layer 520, resulting in a poor display effect of the display module. In order to achieve an integrated display effect without color difference in the outer edge light shielding layer of the display module, the light transmittance of the second black light shielding layer 520 can be set to match the thickness and light transmittance of the first black light shielding layer 510, so that the light intensity passing through the second black light shielding layer 520 and the first black light shielding layer 510 is equal. Therefore, by setting the product of the light transmittance of the first black light shielding layer 510 and the thickness of the first black light shielding layer 510 to be equal to the product of the light transmittance of the second black light shielding layer 520 and the thickness of the second black light shielding layer 520, the color difference between the display area 060 and the non-display area 070 of the display module can be reduced, thereby improving the display effect of the display module.

[0041] The ink printing accuracy of the second black light shielding layer 520 is a positive tolerance, completely covering the edge of the second substrate 300, and the first black light shielding layer 510 uses the second substrate 300 as the side reference line to ensure that no light leakage occurs. The color difference is mainly controlled by the thickness and light transmittance of the first black light shielding layer 510 and the second black light shielding layer 520, and the relationship between the two is: the thickness of the first black light shielding layer 510*the light transmittance of the first black light shielding layer 510=the thickness of the second black light shielding layer 520*the light transmittance of the second black light shielding layer 520.

[0042] The thickness of the second black light shielding layer 520 can be in the range of 2.0 to 4.0 um. For example, the thickness of the second black light shielding layer 520 can be set to 2 um, 2.1 um, 2.2 um, 2.3 um, 2.4 um, 2.5 um, 2.6 um, 2.7 um, 2.8 um, 2.9 um, 3 um, 3.1 um, 3.2 um, 3.3 um, 3.4 um, 3.5 um, 3.6 um, 3.7 um, 3.8 um, 3.9 um or 4.0 um.

[0043] Further, such as Figure 4 As shown, the second black light shielding layer 520 is not only disposed on one side of the first black light shielding layer 510 close to the display area, but can also be disposed on other outer edges of the display panel to enhance the shielding effect on the periphery of other side edges.

[0044] Further, such as Figure 3As shown, the display module also includes a control circuit board 620, the support layer 700 is arranged on the side of the display panel away from the polarizer layer 400, the other end of the flexible circuit board 610 is bent to the side of the support layer 700 away from the display panel and connected to the control circuit board 620, and the curvature radius of the bending area of ​​the flexible circuit board 610 is less than or equal to 1mm. By limiting the bending curvature radius of the flexible circuit board 610 to not more than 1mm, the projection area of ​​the flexible circuit board 610 in the top view of the display module is as small as possible, and the border on the side of the flexible circuit board 610 is as small as possible, which is conducive to the design of the narrow frame module structure and improves the appearance of the display module.

[0045] Further, such as Figure 3 and Figure 4 As shown, the flexible circuit board 610 is arranged on a first side of the display panel, and the display module includes a side sealant 530, and the side sealant 530 is arranged on the side walls of other sides of the display panel except the first side.

[0046] Specifically, the first black light shielding layer 510 and the side sealant 530 are respectively arranged on the four sides of the first substrate 100 and the second substrate 300, wherein the first black light shielding layer 510 is located on the side of the flexible circuit board 610 of the first substrate 100 and the second substrate 300, and the side sealant 530 is located on the other sides, wherein the first black light shielding layer 510 is respectively abutted against the polarizer layer 400 and the flexible circuit board 610, while the side sealant 530 is abutted against the polarizer layer 400. According to this design, the system composed of the first black light shielding layer 510 and the side sealant 530 has three functions: 1. Preventing the display module from leaking light along the edge side of the display panel; 2. Cooperating with the first substrate 100 and the second substrate 300 to form a sealed environment for the display unit layer 200 to isolate it from water and oxygen erosion; 3. The materials of the first black light shielding layer 510 and the side sealant 530 are relatively soft, which can protect the rigid first substrate 100 and the second substrate 300.

[0047] The side sealant 530 is protruding from or parallel to the outer edge of the polarizer layer 400 on the surface away from the display panel. The side sealant 530 is in contact with the portion of the polarizer layer 400 that extends beyond the outer edge of the second substrate 300, and the side sealant 530 does not extend beyond the surface of the polarizer layer 400 that is away from the display panel. Figure 4As shown, the side sealant 530 needs to be protruding or flush with the edge of the polarizer layer 400, and cannot be concave in the polarizer layer 400 to avoid damage to the edge end face of the polarizer layer 400. At the same time, the side sealant 530 must be careful not to overflow from the surface of the first substrate 100 or the surface of the polarizer layer 400. When the overflow enters the display area 060, it will also block the display area 060, causing the display area 060 to be reduced in area and the display module to have a poor appearance. Therefore, the edge glue should be used as a reference to the surface of the polarizer layer 400 and the first substrate 100 to ensure the best glue dispensing parameters. Among them, the optional range of the distance X value of the side sealant 530 from the first substrate 100, the second substrate 300 to the arc convex part is: 0.15 to 0.35 mm. For example, the X value can be set to 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm, and 0.35 mm.

[0048] Furthermore, the color of the side sealant 530 is preferably black, and the second preferred color is dark blue. The light shielding performance parameter range is: 1.5-2.5 cd / 500 um, and the material parameter of the side sealant 530 is: Shore hardness 60-75D.

[0049] In this embodiment, the area of ​​the display unit layer 200 needs to be greater than or equal to the area of ​​the display area 060, wherein the area of ​​the second black shading layer 520 projected on the top view of the display module is equal to the area of ​​the non-display area 070; the area after the shading layer covers the light-emitting unit is the display area. This embodiment can help us control the range of the display area.

[0050] In this embodiment, the first substrate 100 is fixed by the support layer 700 and the fixing layer 800. The fixing layer 800 may preferably be a material with low thermal resistance coefficient and high thermal stability, such as thermal conductive silicone. The fixing layer 800 may be selected by full-surface bonding, frame bonding, point bonding, etc. Full bonding means that the adhesive is distributed on the entire plane where the support layer 700 contacts the back plate 900, frame bonding means that the adhesive is distributed on the periphery of the contact plane between the support layer 700 and the back plate 900, and point bonding means that the adhesive is distributed in a partially discontinuous area where the support layer 700 contacts the back plate 900. The bonding method of the fixing layer 800 is accompanied by the viscosity coefficient of the adhesive. Theoretically, the smaller the contact area between the support layer 700 and the back plate 900, the greater the viscosity coefficient of the adhesive to be selected. Among them, the adhesive may be selected from foam glue or thermosetting glue.

[0051] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A display module, characterized in that: The display module comprises: A display panel, comprising a display area and a non-display area, wherein the non-display area at least partially surrounds the display area, and the display panel comprises: a first substrate; A display unit layer, wherein the display unit layer is disposed on the first substrate and is located in the display area; an array circuit layer, the array circuit layer being disposed on the first substrate and located in the non-display area; and a second substrate, wherein the second substrate covers the display unit layer; A polarizer layer, wherein the polarizer layer is disposed on a side of the second substrate away from the display unit layer, and an outer edge of the polarizer layer protrudes from an outer edge of the second substrate; a flexible circuit board, one end of which is disposed on the first substrate and is electrically connected to the array circuit layer; and A first black light shielding layer is disposed on a side of the polarizer layer facing the first substrate, and a side of the first black light shielding layer facing the first substrate is in contact with a portion of the flexible circuit board.

2. The display module according to claim 1, wherein: The display module also includes a second black light-shielding layer, which is arranged between the second substrate and the polarizer layer and located in the non-display area. The thickness of the second black light-shielding layer is less than that of the first black light-shielding layer.

3. The display module according to claim 2, wherein: The orthographic projection of the second black light-shielding layer on the first substrate covers the orthographic projection of the edge of the display unit layer on the first substrate.

4. The display module according to claim 2, wherein: The second black light shielding layer is disposed on a side of the first black light shielding layer close to the display area and is in contact with the first black light shielding layer.

5. The display module according to claim 2, wherein: The product of the light transmittance of the first black light shielding layer and the thickness of the first black light shielding layer is equal to the product of the light transmittance of the second black light shielding layer and the thickness of the second black light shielding layer.

6. The display module according to any one of claims 2 to 5, characterized in that: The orthographic projection of the second black light shielding layer on the first substrate covers the array circuit layer disposed on the first substrate.

7. The display module according to claim 1, wherein: The distance that the edge of the polarizer layer on one side close to the flexible circuit board exceeds the edge of the second substrate on the corresponding side is greater than the distance that the edge of the polarizer layer on the other side exceeds the edge of the second substrate on the corresponding side.

8. The display module according to claim 1, wherein: The flexible circuit board is arranged on a first side of the display panel, and the display module includes side sealants, which are arranged on side walls of other sides of the display panel except the first side, and the surface of the side sealants facing away from the display panel protrudes from or is parallel to the outer edge of the polarizer layer.

9. The display module according to claim 8, wherein: The side sealant contacts a portion of the polarizer layer that exceeds an outer edge of the second substrate, and the side sealant does not exceed a surface of the polarizer layer that is away from the display panel.

10. The display module according to claim 1, wherein: The display module also includes a supporting layer and a control circuit board. The supporting layer is arranged on the side of the display panel away from the polarizer layer. The other end of the flexible circuit board is bent to the side of the supporting layer away from the display panel and connected to the control circuit board. The curvature radius of the bending area of ​​the flexible circuit board is less than or equal to 1 mm.

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