Display module and electronic device

Abstract

The present application discloses a display module and an electronic device. A first black light shielding layer of the display module is arranged on the side of a polarizer layer facing a display panel, and the side of the first black light shielding layer facing the display panel is in contact with part of a flexible circuit board. In the present application, the first black light shielding layer is used to assist in fixing the flexible circuit board, thereby avoiding breaking of the electrical connection between the flexible circuit board and an array circuit layer caused by mechanical interference during assembly of the display module.

Description

Display modules and electronic devices

[0001] This application claims priority to Chinese patent application No. 202510058913.7, filed on January 14, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, specifically to a display module and an electronic device. Background Technology

[0003] As shown in Figures 1 and 2, the conventional OLED (Organic Light Emitting Diode) display module 080 includes a backplate 01 (base plate 011, side plate 012, front frame 013), a support plate 02, a control circuit board 03, a substrate 04, and a bent circuit board 05 (bending portion 051). The array circuit layer is arranged by laying out GOA (Gate on array) lines in the non-display area 070 surrounding the display area 060. The array circuit layer and the control circuit board 03 are connected by the flexible circuit board 05, and the array circuit layer is shielded by the front frame 013 of the backplate 01. This shielded wiring module structure has the following problems: the flexible circuit board 05, which is electrically connected to the array circuit layer, is exposed. During the assembly of the display module 080, there is a high probability of mechanical interference with the side plate 012 of the backplate 01 and the front frame 013 on the side plate 012. Mechanical interference can cause the electrical connection between the flexible circuit board 05 and the array circuit layer to break. Invention Overview

[0004] Embodiments of this application provide a display module and an electronic device to improve the fixing strength of flexible circuit boards and avoid the problem of electrical connection failure of flexible circuit boards.

[0005] The technical solution provided in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a display module, the display module comprising:

[0007] A display panel includes a display area and a non-display area, wherein the non-display area at least partially surrounds the display area, and the display panel includes:

[0008] First substrate;

[0009] The display unit layer is disposed on the first substrate and located within the display area;

[0010] An array circuit layer, wherein the array circuit layer is disposed on the first substrate and located within the non-display area; and

[0011] The second substrate covers the display unit layer;

[0012] A polarizing layer is disposed on the side of the second substrate away from the display unit layer, and the outer edge of the polarizing layer protrudes beyond the outer edge of the second substrate;

[0013] A flexible circuit board, one end of which is disposed on the first substrate and electrically connected to the array circuit layer; and

[0014] A first black light-shielding layer is disposed on the side of the polarizer layer facing the first substrate, and the side of the first black light-shielding layer facing the first substrate is in partial contact with the flexible circuit board.

[0015] Secondly, embodiments of this application also provide an electronic device, the electronic device including a display module, the display module comprising:

[0016] A display panel includes a display area and a non-display area, wherein the non-display area at least partially surrounds the display area, and the display panel includes:

[0017] First substrate;

[0018] The display unit layer is disposed on the first substrate and located within the display area;

[0019] An array circuit layer, wherein the array circuit layer is disposed on the first substrate and located within the non-display area; and

[0020] The second substrate covers the display unit layer;

[0021] A polarizing layer is disposed on the side of the second substrate away from the display unit layer, and the outer edge of the polarizing layer protrudes beyond the outer edge of the second substrate;

[0022] A flexible circuit board, one end of which is disposed on the first substrate and electrically connected to the array circuit layer; and

[0023] A first black light-shielding layer is disposed on the side of the polarizer layer facing the first substrate, and the side of the first black light-shielding layer facing the first substrate is in partial contact with the flexible circuit board. Attached Figure Description

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

[0025] Figure 2 is a top view of the display module in Figure 1;

[0026] Figure 3 is a cross-sectional view of a display module according to an embodiment of this application;

[0027] Figure 4 is a cross-sectional view of the display module in one embodiment of this 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 light-shielding layer; 520-Second black light-shielding layer; 530-Side sealant; 610-Flexible circuit board; 620-Control circuit board; 700-Support layer; 800-Fixing layer; 900-Back plate; 01-Back plate; 011-Bottom plate; 012-Side plate; 013-Front frame; 02-Support plate; 03-Control circuit board; 04-Substrate; 05-Flexible circuit board; 051-Flexible circuit board bending portion; 060-Display area; 070-Non-display area; 080-Display module. Embodiments of the present invention

[0029] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The technical solutions described below are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0030] Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words indicate two or more unless otherwise expressly specified.

[0031] This application provides a display module. Referring to Figures 3 and 4 of the embodiments of the present invention, the display module includes a display panel, a polarizer layer, a flexible circuit board, and a first black light-shielding layer. The display panel includes a display area and a non-display area, with the non-display area at least partially surrounding 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 disposed on the first substrate and located within the display area; the array circuit layer is disposed on the first substrate and located within the non-display area; the second substrate covers the display unit layer. The polarizer layer is disposed on the side of the second substrate opposite to the display unit layer, and the outer edge of the polarizer layer protrudes beyond the outer edge of the second substrate; one end of the flexible circuit board is disposed on the first substrate and electrically connected to the array circuit layer; the first black light-shielding layer is disposed on the side of the polarizer layer facing the first substrate, and the side of the first black light-shielding layer facing the first substrate partially contacts the flexible circuit board.

[0032] This application embodiment employs a scheme in which a first black light-shielding layer is disposed in the gap between the polarizer layer and the flexible circuit board, and the first black light-shielding layer and the flexible circuit board are in partial contact. The first black light-shielding 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 broken due to mechanical interference during the assembly of the display module. In addition, the polarizer layer of this application solution protrudes from the outer edge of the display panel. By setting the first black light-shielding layer on the part of the polarizer layer that protrudes from the display panel, it can support the polarizer layer, improve the structural strength of the polarizer layer, and avoid the risk of breakage due to interference with the back panel.

[0033] The first black light-shielding layer 510 is required to be made of a material with a Shore hardness range of 60D to 100D. This is to avoid the material being too soft to effectively support the polarizer layer 400, and too hard to easily scratch the flexible circuit board 610. Materials such as silicone and resin can be selected, or improved foaming materials can 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. The selected shapes include, but are not limited to, square, elliptical, and amorphous shapes. 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, referring to Figures 3 and 4 of the embodiments of the present invention, the display module in this application further includes side sealing adhesive 530, support layer 700, fixing layer 800, and back plate 900. A fixing layer 800 is disposed on a back plate 900 to fix a support layer 700 and other components thereon; a first substrate 100 is disposed on the support layer 700, an array line layer 110 is disposed in a non-display area 070 on the first substrate 100, and a display unit layer 200 is disposed in a 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 line layer 110; a second substrate 300 and the first substrate 100 are respectively disposed on both sides of the display unit layer 200; a 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 by which the edge of the polarizer layer 400 on the side closest to the flexible circuit board 610 extends beyond the edge of the corresponding side of the second substrate 300 is greater than the distance by which the edges of the polarizer layer 400 on the other sides extend beyond the edges of the corresponding sides of the second substrate 300.

[0035] Specifically, as shown in Figure 3, the distance by which the edge of the polarizing layer 400 on the side closest to the flexible circuit board 610 extends beyond the edge of the corresponding second substrate 300 is S1. As shown in Figure 4, the distance by which the edge of the polarizing layer 400 on the other side extends beyond the edge of the corresponding second substrate 300 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 support strength of the first black light-shielding layer 510 for the flexible circuit board 610 can be improved.

[0036] In this embodiment, referring to FIG3, the orthographic projection of the display unit layer 200 on the first substrate 100 is smaller than the first substrate 100, such that the edge of the display unit layer 200 is spaced from the edge of the first substrate 100 to accommodate the array line layer 110. To shield the array line layer 110, in this embodiment, the second substrate 300 has a second black light-shielding layer 520 disposed in its non-display area 070 in a direction away from the display unit layer 200. The orthographic projection of the second black light-shielding layer on the first substrate 100 covers the array line layer 110 disposed on the first substrate 100. Specifically, the second black light-shielding layer 520 is disposed between the second substrate 300 and the polarizer layer 400, and is located on the side of the first black light-shielding layer 510 closest to the display area. By disposing of the second black light-shielding layer 520 on the side of the first black light-shielding layer 510 closest to the display area, the array line layer 110 can be shielded using the second black light-shielding layer 520.

[0037] Furthermore, the thickness of the second black light-shielding layer 520 can be set to be less than the thickness of the first black light-shielding layer 510. This allows the thinner second black light-shielding layer 520 to be sandwiched between the display panel and the polarizer, facilitating the molding of the second black light-shielding layer 520.

[0038] Furthermore, as shown in FIG3, 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] Furthermore, as shown in Figure 3, 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, completely blocking the array line layer 110 and the flexible circuit board 610, thus preventing 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, a color difference exists between them, resulting in a deterioration in the display effect of the display module. To achieve a seamless display effect by eliminating color difference in the outer edge light-shielding layers of the display module, the light transmittance of the second black light-shielding layer 520 can be matched with the thickness and light transmittance of the first black light-shielding layer 510, ensuring 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 and thickness of the first black light-shielding layer 510 to equal the product of the light transmittance and 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, improving the display effect of the display module.

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

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

[0043] Furthermore, as shown in Figure 4, the second black light-shielding layer 520 can be disposed not only on the side of the first black light-shielding layer 510 near the display area, but also on other outer edges of the display panel to enhance the shading effect on the outer edges of other sides.

[0044] Furthermore, as shown in Figure 3, the display module also includes a control circuit board 620. The support layer 700 is disposed on the side of the display panel opposite to the polarizer layer 400. The other end of the flexible circuit board 610 is bent to the side of the support layer 700 opposite to the display panel and connected to the control circuit board 620. The radius of curvature of the bent area of ​​the flexible circuit board 610 is less than or equal to 1 mm. By limiting the radius of curvature of the flexible circuit board 610 to no more than 1 mm, the projected area of ​​the flexible circuit board 610 in the top view of the display module is minimized, and the border on the side of the flexible circuit board 610 is minimized. This is beneficial for the design of a narrow bezel module structure and improves the aesthetic appearance of the display module.

[0045] Furthermore, as shown in Figures 3 and 4, the flexible circuit board 610 is disposed on the first side of the display panel, and the display module includes a side sealant 530, which is disposed on the sidewalls of the other sides of the display panel besides the first side.

[0046] Specifically, the first black light-shielding layer 510 and the side sealant 530 are respectively disposed on the four sides of the first substrate 100 and the second substrate 300. 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, while the side sealant 530 is located on the other sides. The first black light-shielding layer 510 abuts against the polarizer layer 400 and the flexible circuit board 610, while the side sealant 530 abuts 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 light leakage from the display module along the edge of the display panel; 2. Forming a sealed environment for the display unit layer 200 with the first substrate 100 and the second substrate 300 to isolate water and oxygen corrosion; 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 protrudes from or is parallel to the outer edge of the polarizer layer 400, away from the surface of the display panel. The side sealant 530 contacts the portion of the polarizer layer 400 that extends beyond the outer edge of the second substrate 300, but does not extend beyond the surface of the polarizer layer 400 away from the display panel. In this embodiment, as shown in FIG. 4, the side sealant 530 needs to protrude from or be flush with the edge of the polarizer layer 400, and must not be recessed into the polarizer layer 400, to avoid damage to the edge face of the polarizer layer 400. Simultaneously, care must be taken to prevent the side sealant 530 from overflowing from the surface of the first substrate 100 or the surface of the polarizer layer 400. When overflowing adhesive enters the display area 060, it will obscure the display area 060, causing a reduction in the area of ​​the display area 060 and resulting in a poor appearance of the display module. Therefore, edge dispensing should be referenced to the surfaces of the polarizer layer 400 and the first substrate 100 to ensure optimal dispensing parameters. The distance X from the side sealant 530 to the arc-shaped protrusion can be selected in the range of 0.15~0.35mm. For example, the X value can be set to 0.15mm, 0.20mm, 0.25mm, 0.30mm, or 0.35mm.

[0048] Furthermore, the side sealant 530 is preferably black, and secondarily dark blue, with a light-blocking performance parameter range of 1.5~2.5cd / 500um. The material parameters of the side sealant 530 are Shore hardness of 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. The area of ​​the second black light-shielding layer 520 projected in the top view of the display module is equal to the area of ​​the non-display area 070. The area after the light-shielding 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 a support layer 700 and a fixing layer 800. The fixing layer 800 can preferably be made of a material with low thermal resistance and high thermal stability, such as thermally conductive silicone. The fixing layer 800 can be applied using methods such as full-surface bonding, frame bonding, or spot bonding. Full bonding means that the adhesive is distributed across the entire plane where the support layer 700 contacts the back plate 900. Frame bonding means that the adhesive is distributed around the periphery of the plane where the support layer 700 contacts the back plate 900. Spot bonding means that the adhesive is distributed in a discontinuous area of ​​the plane where the support layer 700 contacts the back plate 900. The viscosity coefficient of the adhesive is related to the bonding method of the fixing layer 800. Theoretically, the smaller the contact area between the support layer 700 and the back plate 900, the higher the viscosity coefficient of the adhesive should be. The adhesive can be foam adhesive or thermosetting adhesive.

[0051] Based on the same inventive concept, this application also provides an electronic device, which includes a display module from one of the foregoing embodiments. The electronic device can be a mobile phone, tablet computer, laptop, game console, digital camera, car navigation system, electronic billboard, ATM, or other electronic device with display functionality.

[0052] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

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

2. The display module of claim 1, wherein, The display module further comprises a second black light-shielding layer disposed between the second substrate and the polarizer layer and located in the non-display area, the thickness of the second black light-shielding layer being less than the thickness of the first black light-shielding layer.

3. The display module of 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 of 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 in contact with the first black light-shielding layer.

5. The display module of 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 of any one of claims 2-5, wherein, 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 of claim 1, wherein, The distance by which the edge of the polarizer layer close to the flexible circuit board exceeds the edge of the second substrate on the corresponding side is greater than the distance by which the edges of the polarizer layer on other sides exceed the edges of the second substrate on the corresponding sides.

8. The display module of claim 1, wherein, The flexible circuit board is disposed on a first side edge of the display panel, the display module comprising side sealant disposed on the side walls of the other side edges of the display panel except the first side edge, and the surface of the side sealant away from the display panel protruding beyond or parallel to the outer edge of the polarizer layer.

9. The display module of claim 8, wherein, The side sealant is in contact with the part of the polarizer layer exceeding the outer edge of the second substrate, and the side sealant does not exceed the surface of the polarizer layer away from the display panel.

10. The display module of claim 1, wherein, The display module further comprises a support layer and a control circuit board, the support layer being disposed on a side of the display panel away from the polarizer layer, the other end of the flexible circuit board being bent to a side of the support layer away from the display panel and connected to the control circuit board, and the radius of curvature of the bent area of the flexible circuit board being less than or equal to 1 mm.

11. An electronic device, comprising: The electronic device comprises a display module, the display module comprising: A display panel includes a display area and a non-display area at least partially surrounding the display area, and the display panel includes: a first substrate; a display unit layer disposed on the first substrate and located within the display area; an array circuit layer disposed on the first substrate and located within the non-display area; and a second substrate covering the display unit layer; a polarizer layer disposed on a side of the second substrate facing away from the display unit layer, and an outer edge of the polarizer layer protruding beyond an outer edge of the second substrate; a flexible circuit board having one end disposed on the first substrate and electrically connected to the array circuit layer; and a first black light-shielding layer disposed on a side of the polarizer layer facing the first substrate, and the side of the first black light-shielding layer facing the first substrate being in contact with part of the flexible circuit board.

12. The electronic device of claim 11, wherein, The display module further includes a second black light-shielding layer disposed between the second substrate and the polarizer layer and located in the non-display area, and a thickness of the second black light-shielding layer is less than a thickness of the first black light-shielding layer.

13. The electronic device of claim 12, wherein, A normal projection of the second black light-shielding layer on the first substrate covers a normal projection of an edge of the display unit layer on the first substrate.

14. The electronic device of claim 12, 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 in contact with the first black light-shielding layer.

15. The electronic device of claim 12, wherein, A product of a light transmittance of the first black light-shielding layer and a thickness of the first black light-shielding layer is equal to a product of a light transmittance of the second black light-shielding layer and a thickness of the second black light-shielding layer.

16. The electronic device of any of claims 12-15, wherein, A normal projection of the second black light-shielding layer on the first substrate covers the array circuit layer disposed on the first substrate.

17. The electronic device of claim 11, wherein, A distance by which an edge of the polarizer layer close to the flexible circuit board exceeds an edge of the second substrate on a corresponding side is greater than a distance by which edges of the polarizer layer on other sides exceed edges of the second substrate on the corresponding sides.

18. The electronic device of claim 11, wherein, The flexible circuit board is disposed on a first side edge of the display panel, and the display module includes a side sealant disposed on a side wall of a side edge of the display panel other than the first side edge, and a surface of the side sealant facing away from the display panel protrudes beyond or is parallel to an outer edge of the polarizer layer.

19. The electronic device of claim 18, wherein, The side sealant is in contact with part of the polarizer layer protruding beyond the outer edge of the second substrate, and the side sealant does not protrude beyond a surface of the polarizer layer facing away from the display panel.

20. The display module of claim 11, wherein, The display module further includes a support layer disposed on a side of the display panel facing away from the polarizer layer, and the other end of the flexible circuit board is bent to a side of the support layer facing away from the display panel and connected to a control circuit board, and a radius of curvature of a bent area of the flexible circuit board is less than or equal to 1 mm.

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