Liquid crystal panel and display module

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By increasing the thickness of the single-layer area of the lower substrate of the LCD panel and adding reinforcing and protective adhesives, and by optimizing the optical inspection sequence during assembly, the problem of the thin and easily broken single-layer area of the lower substrate was solved, thus improving reliability and stability.

CN222354217UActive Publication Date: 2025-01-14XINLI OPTICAL RENSHOU CO LTD

View PDF 0 Cites 0 Cited by

Patent Information

Application Number: CN202420351853.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-02-26
Publication Date: 2025-01-14
Estimated Expiration: 2034-02-26

AI Technical Summary

Technical Problem

The single-layer area of the substrate under the existing LCD panel is thin and easily cracked, which reduces reliability and affects product competitiveness.

Method used

The thickness of the single-layer area of the lower substrate is increased and reinforcing and protective adhesives are applied. The lower polarizer is extended below the single-layer area to form a high-transmittance area. During the assembly process, optical inspection is performed first, and then the lower polarizer is attached. The backlight assembly and protective cover are combined for support.

Benefits of technology

This improves the reliability and stability of the single-layer region of the lower substrate, avoids optical detection interference, and enhances the competitiveness of the product.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN222354217U_ABST

Patent Text Reader

Abstract

The utility model discloses a liquid crystal panel which comprises an upper polaroid, an upper substrate, a lower substrate and a lower polaroid which are sequentially arranged in a stacked mode from top to bottom, and the lower substrate comprises a double-layer area corresponding to the upper substrate and a single-layer area extending out of the upper substrate. The single-layer area of the lower substrate is connected with a driving chip and a flexible circuit board in a binding mode through an anisotropic conductive adhesive film. The lower polaroid comprises a polarization area corresponding to the double-layer area and an extension area corresponding to the single-layer area. According to the liquid crystal panel, the reliability of the single-layer area of the lower substrate can be improved. The utility model further discloses a display module which comprises the liquid crystal panel.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to liquid crystal display technology, in particular to a liquid crystal panel and a display module. Background Art

[0002] The liquid crystal panel includes an upper polarizer, an upper substrate, a lower substrate and a lower polarizer stacked in sequence from top to bottom. In order to bind the driver chip and the flexible circuit board on the lower substrate, the existing lower substrate is generally longer than the upper substrate and protrudes outward, and the protruding part is also called a single-layer area, and the driver chip and the flexible circuit board are bound to the single-layer area of the lower substrate.

[0003] The driving chip and the flexible circuit board are bound to the lower substrate through an anisotropic conductive adhesive film. In order to facilitate the use of optical detection equipment to take pictures of the single-layer area of the lower substrate from the back to detect the conduction status of the conductive particles in the anisotropic conductive adhesive film, the lower polarizer needs to avoid the single-layer area of the lower substrate.

[0004] The above structure causes the single-layer region of the lower substrate to be weak and easy to break, thereby reducing the reliability of the single-layer region of the lower substrate and thus reducing the competitiveness of the product. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a liquid crystal panel, which can improve the reliability of the single-layer area of the lower substrate.

[0006] A display module comprises the above-mentioned liquid crystal panel.

[0007] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0008] A liquid crystal panel comprises an upper polarizer, an upper substrate, a lower substrate and a lower polarizer which are stacked in sequence from top to bottom, wherein the lower substrate comprises a double-layer region corresponding to the upper substrate and a single-layer region extending outside the upper substrate, and a driving chip and a flexible circuit board are bound and connected to the single-layer region of the lower substrate through an anisotropic conductive adhesive film; the lower polarizer comprises a polarization region corresponding to the double-layer region and an extension region corresponding to the single-layer region.

[0009] Furthermore, a reinforcing glue is provided between the lower surface of the flexible circuit board and the side surface of the lower substrate.

[0010] Furthermore, a protective glue is provided on the upper surface of the single-layer area to avoid the driving chip and the flexible circuit board.

[0011] Furthermore, the extended area of the lower polarizer is a high-transmittance area.

[0012] Furthermore, the lower polarizer includes a first transparent film layer and a polarizing material layer, and the polarizing material layer is arranged on one side surface of the first transparent film layer; the polarizing material layer avoids the single-layer area so that the extended area of the lower polarizer forms the high-transmittance area.

[0013] Furthermore, the lower polarizer also includes a second transparent film layer, and the second transparent film layer is arranged on a surface of the polarizing material layer on a side away from the first transparent film layer.

[0014] A display module comprises a backlight assembly and the above-mentioned liquid crystal panel, wherein the liquid crystal panel is arranged on the light-emitting side of the backlight assembly.

[0015] Furthermore, the backlight assembly includes a frame and a light bar and a light guide plate arranged in the frame, the light incident surface of the light guide plate faces the light bar, and the light emitting surface of the light guide plate faces the light emitting side of the backlight assembly; the frame is provided with a light-shielding tape on the light emitting side of the backlight assembly, and the light-shielding tape is provided with a window area for limiting the light emitting range of the backlight assembly; the liquid crystal panel is adhered to the light emitting side of the backlight assembly through the light-shielding tape, and the light-shielding tape is adhered to the extended area of the lower polarizer.

[0016] Furthermore, the display module also includes a protective cover plate, and the protective cover plate is arranged on a surface of the liquid crystal panel that is away from the backlight assembly.

[0017] Furthermore, a buffer glue is connected between the protection cover plate and the single-layer area of the lower substrate.

[0018] The utility model has the following beneficial effects: the liquid crystal panel of the utility model extends the lower polarizer to below the single-layer area to form the extended area, so as to increase the thickness of the single-layer area of the lower substrate and improve the reliability of the lower substrate in the single-layer area; during assembly, the upper polarizer is firstly attached to the upper substrate, and then the driving chip and the flexible circuit board are bound to the single-layer area of the lower substrate, and then an optical detection device is used to take a picture of the single-layer area of the lower substrate from the back to detect the conduction condition of the conductive particles in the anisotropic conductive adhesive film, and finally the lower polarizer is attached to the lower substrate; since the optical detection step of the anisotropic conductive adhesive film is before the attachment step of the lower polarizer, the optical detection device is not affected by the lower polarizer when taking pictures of the single-layer area, so the lower polarizer can be extended to below the single-layer area to increase the thickness of the single-layer area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the stacking structure of the liquid crystal panel provided by the utility model.

[0020] Figure 2 This is a schematic diagram of the stacking structure of the lower polarizer in another liquid crystal panel provided by the utility model.

[0021] Figure 3 This is a schematic diagram of the stacking structure of the display module provided by the utility model. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0026] like Figure 1As shown, a liquid crystal panel includes an upper polarizer 11, an upper substrate 12, a lower substrate 13 and a lower polarizer 14 stacked in sequence from top to bottom, the lower substrate 13 includes a double-layer area 131 corresponding to the upper substrate 12 and a single-layer area 132 extending outside the upper substrate 12, and a driving chip 15 and a flexible circuit board 16 are bound and connected to the single-layer area 132 of the lower substrate 13 through an anisotropic conductive adhesive film 19; the lower polarizer 14 includes a polarization area 141 corresponding to the double-layer area 131 and an extension area 142 corresponding to the single-layer area 132.

[0027] The liquid crystal panel of the utility model extends the lower polarizer 14 to below the single-layer area 132 to form the extended area 142, so as to increase the thickness of the single-layer area 132 of the lower substrate 13, and improve the reliability of the lower substrate 13 at the single-layer area 132; during assembly, the upper substrate 12 is firstly attached to the upper polarizer 11, and then the driving chip 15 and the flexible circuit board 16 are bound to the single-layer area 132 of the lower substrate 13, and then the optical detection equipment is used to detect the lower substrate 13 from the back. 3 is photographed to detect the conduction status of the conductive particles in the anisotropic conductive adhesive film 19, and finally the lower polarizer 14 is bonded to the lower substrate 13; since the optical inspection step of the anisotropic conductive adhesive film 19 is before the bonding step of the lower polarizer 14, the optical inspection equipment is not affected by the lower polarizer 14 when photographing the single-layer area 132, so the lower polarizer 14 can be extended to below the single-layer area 132 to increase the thickness of the single-layer area 132.

[0028] The upper polarizer 11 is attached to the upper surface of the upper substrate 12 by a pressure-sensitive adhesive (not shown in the figure), and the lower polarizer 14 is also attached to the lower surface of the lower substrate 13 by a pressure-sensitive adhesive (not shown in the figure).

[0029] A reinforcing glue 17 is provided between the lower surface of the flexible circuit board 16 and the side surface of the lower substrate 13. The reinforcing glue 17 supports the flexible circuit board 16 with the side surface of the lower substrate 13 as a fulcrum to improve the rigidity of the flexible circuit board 16. The reinforcing glue 17 also increases the distance between the binding position of the flexible circuit board 16 and the side edge of the lower substrate 13, which can prevent the binding position of the flexible circuit board 16 from being subjected to bending stress and bouncing off from the single-layer area 132 of the lower substrate 13 when the flexible circuit board 16 is bent.

[0030] The upper surface of the single-layer area 132 is provided with a protective glue 18 that avoids the driving chip 15 and the flexible circuit board 16. The protective glue 18 is used to protect the panel wiring located on the single-layer area 132 to prevent the panel wiring from being corroded by water vapor.

[0031] The protective glue 18 may be, but is not limited to, an insulating high molecular polymer, such as epoxy resin. Embodiment 2

[0032] As an optimization solution of the first embodiment, in this embodiment, if Figure 2 As shown, the extended area 142 of the lower polarizer 14 is a high-transmittance area 142 ′.

[0033] In the utility model, the extended area 142 extending from the lower polarizer 14 to below the single-layer area 132 is set as a high-transmittance area 142' to allow light to pass through. In the optical inspection of the anisotropic conductive film 19, it will not affect the optical inspection device from taking pictures of the single-layer area 132 of the lower substrate 13 from the back. During assembly, according to the existing process, the lower substrate 13 can be first attached to the lower polarizer 14, and then the driving chip 15 and the flexible circuit board 16 can be bound to the single-layer area 132 of the lower substrate 13. Then, an optical inspection device is used to take pictures of the single-layer area 132 of the lower substrate 13 from the back through the high-transmittance area 142' of the lower polarizer 14 to detect the conduction of the conductive particles in the anisotropic conductive film 19.

[0034] The lower polarizer 14 includes a first transparent film layer 143, a polarizing material layer 144 and a second transparent film layer 145. The polarizing material layer 144 is arranged on a side surface of the first transparent film layer 143, and the second transparent film layer 145 is arranged on a side surface of the polarizing material layer 144 away from the first transparent film layer 143; the polarizing material layer 144 avoids the single-layer area 132 so that the extended area 142 of the lower polarizer 14 forms the high-transmittance area 142'.

[0035] In the present invention, the polarizing material layer 144 of the lower polarizer 14 is designed to avoid the single-layer area 132. After avoiding, the lower polarizer 14 does not cover the polarizing material in its extended area 142, thereby forming a high-transmittance area 142' that allows light to pass through. Embodiment 3

[0036] like Figure 3 As shown, a display module includes a backlight assembly 3 and the liquid crystal panel 2 described in the first or second embodiment, wherein the liquid crystal panel 2 is arranged on the light emitting side of the backlight assembly 3 .

[0037] The backlight assembly 3 includes a frame 31 and a light bar 32 and a light guide plate 33 arranged in the frame 31, the light incident surface of the light guide plate 33 faces the light bar 32, and the light emitting surface of the light guide plate 33 faces the light emitting side of the backlight assembly 3; the frame 31 is provided with a light shielding tape 34 on the light emitting side of the backlight assembly 3, and the light shielding tape 34 is provided with a window area for limiting the light emitting range of the backlight assembly 3; the liquid crystal panel 2 is attached to the light emitting side of the backlight assembly 3 through the light shielding tape 34, and the light shielding tape 34 is attached to the extended area 142 of the lower polarizer 14.

[0038] In the display module of the present invention, after the lower polarizer 14 of the liquid crystal panel 2 extends to the single-layer area 132 of the lower substrate 13, the shading tape 34 of the backlight assembly 3 is attached to the extended area 142 of the lower polarizer 14, and the single-layer area 132 of the lower polarizer 14 is supported from below by the frame 31 and the shading tape 34, which can further improve the stability of the single-layer area 132 of the lower substrate 13.

[0039] The display module further includes a protective cover plate 1 , which is disposed on a surface of the liquid crystal panel 2 facing away from the backlight assembly 3 , and a buffer glue 4 is connected between the protective cover plate 1 and the single-layer region 132 of the lower substrate 13 .

[0040] The display module of the present invention sets the buffer glue 4 between the protective cover plate 1 and the single-layer area 132 of the lower substrate 13, and uses the protective cover plate 1 to form an upper support for the single-layer area 132 of the lower substrate 13 through the buffer glue 4, which can further improve the stability of the single-layer area 132 of the lower substrate 13.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A liquid crystal panel, comprising an upper polarizer, an upper substrate, a lower substrate and a lower polarizer stacked in sequence from top to bottom, wherein the lower substrate comprises a double-layer region corresponding to the upper substrate and a single-layer region extending outside the upper substrate, and a driving chip and a flexible circuit board are connected to the single-layer region of the lower substrate by binding with an anisotropic conductive adhesive film; characterized in that: The lower polarizer includes a polarization area corresponding to the double-layer area and an extension area corresponding to the single-layer area.

2. The liquid crystal panel according to claim 1, characterized in that: A reinforcing glue is provided between the lower surface of the flexible circuit board and the side surface of the lower substrate.

3. The liquid crystal panel according to claim 1, characterized in that: The upper surface of the single-layer area is provided with protective glue to avoid the driving chip and the flexible circuit board.

4. The liquid crystal panel according to claim 1, characterized in that: The extended area of the lower polarizer is a high-transmittance area.

5. The liquid crystal panel according to claim 4, characterized in that: The lower polarizer includes a first transparent film layer and a polarizing material layer, wherein the polarizing material layer is arranged on one side surface of the first transparent film layer; the polarizing material layer avoids the single-layer area so that the extended area of the lower polarizer forms the high-transmittance area.

6. The liquid crystal panel according to claim 5, characterized in that: The lower polarizer also includes a second transparent film layer, and the second transparent film layer is arranged on a surface of the polarizing material layer on a side away from the first transparent film layer.

7. A display module, characterized in that: The invention comprises a backlight assembly and the liquid crystal panel as claimed in claim 1, wherein the liquid crystal panel is arranged on the light emitting side of the backlight assembly.

8. The display module according to claim 7, characterized in that: The backlight assembly includes a frame and a light bar and a light guide plate arranged in the frame, the light incident surface of the light guide plate faces the light bar, and the light emitting surface of the light guide plate faces the light emitting side of the backlight assembly; the frame is provided with a light-shielding tape on the light emitting side of the backlight assembly, and the light-shielding tape is provided with a window area for limiting the light emitting range of the backlight assembly; the liquid crystal panel is adhered to the light emitting side of the backlight assembly through the light-shielding tape, and the light-shielding tape is adhered to the extended area of the lower polarizer.

9. The display module according to claim 7, characterized in that: The display module further comprises a protection cover plate, and the protection cover plate is arranged on a surface of the liquid crystal panel which is away from the backlight assembly.

10. The display module according to claim 9, characterized in that: A buffer glue is connected between the protection cover plate and the single-layer area of the lower substrate.