Liquid crystal display screen capable of avoiding MURA at IC position

Abstract

The utility model discloses a liquid crystal display screen capable of avoiding MURA at an IC (integrated circuit) position, which comprises a lower polaroid, a lower substrate, an upper substrate, an upper polaroid, an IC and a cover plate, and the lower substrate is arranged above the lower polaroid; the upper substrate is arranged above the lower substrate, and the lower substrate is longer than the upper substrate and extends outwards to form a step; the upper polaroid is arranged above the upper substrate; the IC is bound on the upper surface of the lower substrate at the step; the cover plate is arranged above the upper polaroid, and the cover plate is fully attached to the upper polaroid through optical cement; and avoiding grooves for avoiding the IC are formed in the areas, close to the IC, of the upper polaroid and the optical cement. Due to the fact that the receding grooves for receding the IC are formed in the areas, close to the IC, of the upper polaroid and the optical cement, even if the upper polaroid and the optical cement deform due to thermal expansion and cold contraction, the IC cannot be affected, economic losses caused by MURA are avoided, and the competitiveness of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a liquid crystal display screen for avoiding IC position MURA. Background Art

[0002] When the display module, cover plate and touch module are all bonded, the upper polarizer cannot be made too small to avoid insufficient adhesion after bonding with the optical glue, thereby avoiding cracking. Therefore, the distance between the optical glue and the upper polarizer and the IC is very close. However, this type of LCD screen is prone to MURA problems after assembly. Due to the dense wiring near the IC, the upper polarizer and optical glue are prone to thermal expansion and contraction and deformation, resulting in MURA near the IC position. These MURA problems are difficult to detect before the light is turned on. They can only be discovered after specific tests are performed after assembling the display module and the backlight module. Therefore, the economic losses caused by rework due to this problem are large, which increases the manufacturing cost of the LCD screen and reduces the competitiveness of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to reduce the economic loss and improve the competitiveness of products by eliminating MURA at the IC position.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the utility model provides a liquid crystal display screen that avoids MURA at the IC position, comprising a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, an IC and a cover plate, wherein the lower substrate is arranged above the lower polarizer; the upper substrate is arranged above the lower substrate, the lower substrate is longer than the upper substrate and extends outward to form a step; the upper polarizer is arranged above the upper substrate; the IC is bound to the upper surface of the lower substrate located at the step; the cover plate is arranged above the upper polarizer, and the cover plate and the upper polarizer are fully bonded by optical glue; the upper polarizer and the optical glue are both provided with avoidance grooves for avoiding the IC in the area close to the IC.

[0006] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, the distance between the avoidance groove and the single side of the IC is 1mm-5mm.

[0007] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, it also includes a backlight module, and an overlapping sponge is arranged between the backlight module and the lower polarizer.

[0008] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, a corresponding area of ​​the overlapping sponge close to the IC is provided with an avoidance groove for avoiding the IC.

[0009] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, the upper surface and the lower surface of the overlapping sponge are respectively provided with low-viscosity glue and high-viscosity glue.

[0010] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, the initial adhesion ratio of the high viscosity glue to the low viscosity glue is 2:1 to 50:1.

[0011] As a preferred implementation of the liquid crystal display screen that avoids IC position MURA provided by the utility model, the low-viscosity glue and the high-viscosity glue have the same viscosity, the glue coating shape of the low-viscosity glue is a grid shape, and the glue coating shape of the high-viscosity glue is a complete coating.

[0012] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, a PET substrate layer is further provided on the upper surface of the overlapping sponge, and the low-viscosity glue is provided on the upper surface of the PET substrate layer.

[0013] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, a color coating is provided on the upper surface of the PET substrate layer.

[0014] As a preferred implementation of the liquid crystal display screen for avoiding IC position MURA provided by the utility model, the color of the color coating is red.

[0015] The utility model has the following beneficial effects:

[0016] Since the upper polarizer and the optical adhesive are provided with avoidance grooves for avoiding the IC in the area near the IC, even if the upper polarizer and the optical adhesive are deformed due to thermal expansion and contraction, it will not affect the IC, thus avoiding the generation of MURA and causing economic losses, thereby reducing the manufacturing cost of the LCD screen and improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1A schematic diagram of the structure of a liquid crystal display screen for avoiding IC position MURA provided by the utility model.

[0019] Figure 2 for Figure 1 Top view of the lower substrate, upper substrate and upper polarizer.

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 This is a schematic diagram of the structure of Example 2.

[0022] Figure 5 for Figure 4 Schematic diagram of the structure of the overlapped sponge.

[0023] Description of Figure Numbers:

[0024] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; IC 5; cover plate 6; optical adhesive 7; avoidance groove 8;

[0025] Backlight module 100; overlapping sponge 9; PET substrate layer 91; high viscosity glue 92; low viscosity glue 93. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] 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 the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] The utility model provides a liquid crystal display screen for avoiding MURA at the IC position, comprising a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, an IC and a cover plate, wherein the lower substrate is arranged above the lower polarizer; the upper substrate is arranged above the lower substrate, the lower substrate is longer than the upper substrate and extends outward to form a step; the upper polarizer is arranged above the upper substrate; the IC is bound to the upper surface of the lower substrate located at the step; the cover plate is arranged above the upper polarizer, and the cover plate and the upper polarizer are fully bonded by optical glue; the upper polarizer and the optical glue are both provided with avoidance grooves for avoiding the IC in an area close to the IC.

[0030] Since the upper polarizer and the optical adhesive are provided with avoidance grooves for avoiding the IC in the area near the IC, even if the upper polarizer and the optical adhesive are deformed due to thermal expansion and contraction, it will not affect the IC, thus avoiding the generation of MURA and causing economic losses, thereby reducing the manufacturing cost of the LCD screen and improving the competitiveness of the product.

[0031] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and 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 with 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 limitations on the present invention.

[0032] Example 1

[0033] See also Figures 1 to 3, a liquid crystal display screen for avoiding MURA at the IC position provided by the utility model, comprising a lower polarizer 1, a lower substrate 2, an upper substrate 3, an upper polarizer 4, an IC5 and a cover plate 6, wherein the lower substrate 2 is arranged above the lower polarizer 1; the upper substrate 3 is arranged above the lower substrate 2, the lower substrate 2 is longer than the upper substrate 3 and extends outward to form a step; the upper polarizer 4 is arranged above the upper substrate 3; the IC5 is bound to the upper surface of the lower substrate 2 located at the step; the cover plate 6 is arranged above the upper polarizer 4, and the cover plate 6 and the upper polarizer 4 are fully bonded by the optical glue 7; the upper polarizer 4 and the optical glue 7 are both provided with a avoidance groove 8 for avoiding IC5 in the area near IC5. Since the upper polarizer 4 and the optical glue 7 are both provided with a avoidance groove 8 for avoiding IC5 in the area near IC5, even if the upper polarizer 4 and the optical glue 7 are deformed by thermal expansion and contraction, it will not affect IC5, avoiding the generation of MURA and causing economic losses, thereby reducing the manufacturing cost of the liquid crystal display screen and improving the competitiveness of the product.

[0034] Furthermore, the single-side distance between the avoidance groove 8 and IC5 is 1mm-5mm, that is, each side of the avoidance groove 8 is 1mm-5mm away from IC5, so that the upper polarizer 4 and the optical adhesive 7 have enough avoidance space with IC5 when they expand and contract due to heat and cold.

[0035] Example 2

[0036] See also Figure 4 and Figure 5 As a further optimization solution of Example 1, this embodiment further includes a backlight module 100 , and a lap sponge 9 is provided between the backlight module 100 and the lower polarizer 1 .

[0037] Furthermore, a corresponding area of ​​the overlapping sponge 9 close to IC5 is provided with an avoidance groove 8 for avoiding IC5, so as to prevent the overlapping sponge 9 from affecting IC5 and causing MURA.

[0038] Furthermore, the overlapping sponge 9 includes a PET substrate layer 91, a high-viscosity glue 92 is provided on the lower surface of the PET substrate layer 91, and a low-viscosity glue 93 is provided on the upper surface of the PET substrate layer 91. The high-viscosity glue 92 can make the overlapping sponge 9 and the glue frame of the backlight module 100 firmly adhere together to avoid falling off, while the low-viscosity glue 93 has weaker adhesion. While ensuring the firmness of the adhesion between the overlapping sponge 9 and the lower polarizer 1, it can also avoid pulling the lower polarizer 1 and causing wrinkles when deformed at high temperature.

[0039] Furthermore, the initial adhesion ratio of the high viscosity glue 92 to the low viscosity glue 93 is 2:1 to 50:1, and the purpose of controlling the adhesion of the high viscosity glue 92 to the low viscosity glue 93 is achieved by controlling the initial adhesion ratio of the high viscosity glue 92 to the low viscosity glue 93.

[0040] More preferably, as another embodiment of the present invention, the low-viscosity glue 93 and the high-viscosity glue 92 in this embodiment have the same viscosity, that is, the same glue is used, but different viscosities are achieved by controlling the glue coating method, wherein the low-viscosity glue 93 is coated in a grid shape, while the high-viscosity glue 92 is completely coated. Since the low-viscosity glue 93 and the high-viscosity glue 92 have the same viscosity, only one type of glue needs to be purchased, thereby increasing the purchase volume of the glue, reducing the purchase cost, and making it difficult to confuse during the glue coating process, thereby improving production efficiency and avoiding the misuse of glues of different viscosities. The coating shape of the low-viscosity glue 93 is a grid shape, which is equivalent to reducing the glue area of ​​the low-viscosity glue 93, thereby reducing the viscosity of the low-viscosity glue 93.

[0041] Furthermore, a color coating is provided on the upper surface of the PET substrate layer 91, and the high-viscosity glue 92 is provided above the color coating. The color of the color coating is red, so that it is easier to identify the two sides of the low-viscosity glue 93 and the high-viscosity glue 92, which plays a fool-proof role and avoids reversing the high-viscosity glue 92 and the low-viscosity glue 93 during assembly, thereby improving assembly efficiency and reducing the generation of defective products.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A liquid crystal display screen for avoiding IC position MURA, characterized in that: It includes: Lower polarizer; A lower substrate, which is arranged above the lower polarizer; An upper substrate is disposed above the lower substrate, wherein the lower substrate is longer than the upper substrate and extends outward to form a step; an upper polarizer, which is disposed above the upper substrate; An IC, which is bonded to the upper surface of the lower substrate located at the step; A cover plate, which is arranged above the upper polarizer, and the cover plate and the upper polarizer are fully bonded by optical adhesive; The upper polarizer and the optical adhesive are both provided with avoidance grooves for avoiding the IC in the area close to the IC.

2. The liquid crystal display screen for avoiding IC position MURA according to claim 1, characterized in that: The single-side distance between the avoidance groove and the IC is 1mm-5mm.

3. The liquid crystal display screen for avoiding IC position MURA according to claim 1, characterized in that: It also includes a backlight module, and a lap sponge is arranged between the backlight module and the lower polarizer.

4. The liquid crystal display screen for avoiding IC position MURA according to claim 3, characterized in that: A corresponding area of ​​the overlapping sponge close to the IC is provided with an avoidance groove for avoiding the IC.

5. The liquid crystal display screen for avoiding IC position MURA according to claim 3, characterized in that: The upper surface and the lower surface of the overlapping sponge are respectively provided with low-viscosity glue and high-viscosity glue.

6. The liquid crystal display screen for avoiding IC position MURA according to claim 5, characterized in that: The initial adhesion ratio of the high viscosity glue to the low viscosity glue is 2:1 to 50:

1.

7. The liquid crystal display screen for avoiding IC position MURA according to claim 5, characterized in that: The low-viscosity glue and the high-viscosity glue have the same viscosity. The low-viscosity glue is coated in a grid shape, while the high-viscosity glue is completely coated.

8. The liquid crystal display screen for avoiding IC position MURA according to claim 5, characterized in that: A PET substrate layer is also provided on the upper surface of the overlapping sponge, and the low-viscosity glue is provided on the upper surface of the PET substrate layer.

9. The liquid crystal display screen for avoiding IC position MURA according to claim 8, characterized in that: The upper surface of the PET substrate layer is provided with a color coating.

10. The liquid crystal display screen for avoiding IC position MURA according to claim 9, characterized in that: The color of the color coating is red.

Images