CN219266753U - Liquid crystal display screen capable of avoiding display of MURA - Google Patents

Abstract

The utility model discloses a liquid crystal display screen capable of avoiding displaying MURA, which comprises a lower frame, a reflecting sheet, a light guide plate, a diffusion film, a brightness enhancement film, a lower polaroid, a lower substrate, an upper polaroid and a cover plate which are sequentially overlapped from bottom to top, wherein an LED lamp is arranged on one side of the light guide plate, a shading adhesive is arranged between the brightness enhancement film and the lower polaroid, which are positioned in a non-visible area, the brightness enhancement film is a low-thickness brightness enhancement film, the brightness enhancement film comprises a PET substrate and a prismatic tooth structure layer arranged on the PET substrate, and an optical adhesive layer with uneven surface is arranged on the lower surface of the PET substrate. The lower surface of PET base plate is provided with the optical glue layer of surface unevenness in the enhancement film in this structure for light can be further broken up when passing through the optical glue layer of upper enhancement film, will originally different regional light that the optical path rule is stronger totally breaks up, destroys its original regularity of peripheral and regional optical path difference in central region, and then avoids yellow frame and MURA.

Description

Liquid crystal display screen capable of avoiding display of MURA

Technical Field

The utility model relates to the technical field of liquid crystal display, in particular to a liquid crystal display screen capable of avoiding display of MURA.

Background

The liquid crystal display of the mobile phone type liquid crystal display generally adopts a laminated structure, and mainly comprises a liquid crystal display module and a backlight module arranged below the liquid crystal display module. The liquid crystal display module mainly comprises a protective cover plate, an upper polaroid, an upper substrate, a lower substrate and a lower polaroid from top to bottom; the backlight module comprises a light enhancement film, a diffusion film, a light guide plate, a reflecting film and a lower frame from top to bottom, and an LED lamp is arranged on one side of the light guide plate. The backlight module and the liquid crystal display module are adhered together through shading glue carried by the backlight module. Because of the certain static electricity which is inevitably existed on the lower polaroid and various film materials on the backlight module, and because the thickness of the intensifying film is very thin, the thickness is only about 80 mu m. These static electricity can cause the thin brightness enhancement film in the central area of the liquid crystal display to be absorbed by the lower polarizer, so that the brightness enhancement film is slightly deformed. When light enters the lower polaroid from the backlight module, the optical path difference between the visible area of the liquid crystal display module, which is close to the edge area, and the middle area is different, the obvious color difference between the edge and the center display color of the liquid crystal display is finally shown, and the peripheral edge optical path is longer, and the peripheral and center light paths are relatively regular, so that the color is usually shown to be yellow, and the visual effects of yellow frames and MURA are further caused.

Disclosure of Invention

The utility model aims to solve the technical problem of how to avoid yellow frames and MURA at the edge of a liquid crystal display screen.

The technical problems to be solved by the utility model are realized by the following technical scheme:

in order to solve the technical problems, the utility model provides a liquid crystal display screen for avoiding displaying MURA, which comprises a lower frame, a reflecting sheet, a light guide plate, a diffusion film, a brightness enhancement film, a lower polaroid, a lower substrate, an upper polaroid and a cover plate which are sequentially overlapped from bottom to top, wherein an LED lamp is arranged on one side of the light guide plate, a shading adhesive is arranged between the brightness enhancement film and the lower polaroid which are positioned in a non-visible area, the brightness enhancement film is a low-thickness brightness enhancement film, the brightness enhancement film comprises a PET substrate and a prismatic structure layer arranged on the PET substrate, and an optical adhesive layer with uneven surface is arranged on the lower surface of the PET substrate.

As a preferred embodiment of the lcd panel for avoiding displaying MURA provided by the present utility model, the thickness of the brightness enhancement film is less than 100 μm.

As a preferred embodiment of the lcd panel for avoiding displaying MURA provided by the present utility model, the thickness of the brightness enhancement film is 80 μm.

In an preferred embodiment of the lcd panel for avoiding MURA, the upper surface of the cover plate is formed with a plurality of grooves by etching, and a plastic layer is covered over the cover plate, and is embedded into the plurality of grooves.

As an optimal implementation mode of the liquid crystal display screen for avoiding displaying MURA, the grooves are narrow outside and wide inside.

As a preferred implementation mode of the liquid crystal display screen for avoiding displaying MURA, the upper surface of the plastic layer is provided with an anti-fingerprint coating.

As a preferred implementation manner of the LCD screen avoiding displaying MURA, the utility model further comprises a rubber frame for bearing the lower polarizer, the lower substrate, the upper substrate and the upper polarizer, wherein the upper substrate and the lower substrate are mutually staggered to form steps, the edge of the rubber frame extends upwards to form side walls, and at least two buckles are arranged on the side walls and buckle the steps.

As an preferable implementation mode of the LCD screen avoiding displaying MURA, a gasket is further arranged between the lower polarizer and the frame.

As a preferred embodiment of the lcd panel for avoiding displaying MURA provided by the present utility model, the upper surface of the spacer is coated with a weak adhesive glue, and the lower surface of the spacer is coated with a strong adhesive glue.

In an embodiment of the lcd panel for avoiding displaying MURA provided by the present utility model, the glue viscosity of the weak-viscosity glue is the same as that of the strong-viscosity glue, the glue coating shape of the weak-viscosity glue is a grid shape, and the glue coating shape of the strong-viscosity glue is a complete coating.

The utility model has the following beneficial effects:

the brightness enhancement film is a low-thickness brightness enhancement film, so that yellow spots are easily generated due to the fact that static electricity is absorbed and deformed by the upper polaroid, the lower surface of the PET substrate in the brightness enhancement film is provided with an optical adhesive layer with uneven surface, the optical adhesive layer is completely coated on the lower surface of the PET substrate, light rays can be further scattered when passing through the optical adhesive layer of the upper brightness enhancement film, the light rays with stronger optical path rules in different areas are all scattered, the regularity of the optical path differences in the periphery and the central area is destroyed, the liquid crystal display finally shows relatively similar colors after the colors of the different optical path differences in the edge area and the central area are mixed, a yellow frame and a MURA are further avoided, the color integration effect of the liquid crystal display is improved, the probability of defective products of the liquid crystal display is reduced, the production and manufacturing cost of the liquid crystal display are also greatly reduced, and the product competitiveness of the liquid crystal display is improved, and the increasing quality requirements of enterprises are met.

Drawings

For a clearer description of the solution in the present application, a brief description will be given below of the drawings that are needed in the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a lcd panel for avoiding displaying MURA according to the present utility model.

Fig. 2 is a state diagram of the brightness enhancement film bent after electrostatic adsorption.

Fig. 3 is a schematic diagram of an improved structure of the brightness enhancement film.

Fig. 4 is a schematic diagram of an improved structure of the cover plate.

FIG. 5 is an exploded view of FIG. 4

Fig. 6 is a schematic diagram of another modification of the cover plate.

Fig. 7 is a schematic structural diagram of embodiment 3.

Fig. 8 is a schematic view of a modified structure of the gasket of fig. 7.

Reference numerals illustrate:

a light enhancement film 1; a lower polarizer 2; a lower substrate 3; an upper substrate 4; a top polarizer 5; a cover plate 6;

a PET substrate 11; a rib structure layer 12; an optical adhesive layer 13;

a groove 61; a plastic layer 62;

a rubber frame 7; a side wall 71; a clasp 72;

a gasket 8; a weak tack glue 81; a strong adhesive glue 82.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The utility model provides a liquid crystal display screen capable of avoiding displaying MURA, which comprises a lower frame, a reflecting sheet, a light guide plate, a diffusion film, a brightness enhancement film, a lower polaroid, a lower substrate, an upper polaroid and a cover plate which are sequentially overlapped from bottom to top, wherein an LED lamp is arranged on one side of the light guide plate, a shading adhesive is arranged between the brightness enhancement film and the lower polaroid, which are positioned in a non-visible area, the brightness enhancement film is a low-thickness brightness enhancement film, the brightness enhancement film comprises a PET substrate and a prismatic tooth structure layer arranged on the PET substrate, and an optical adhesive layer with uneven surface is arranged on the lower surface of the PET substrate.

The brightness enhancement film is a low-thickness brightness enhancement film, so that yellow spots are easily generated due to the fact that static electricity is absorbed and deformed by the upper polaroid, the lower surface of the PET substrate in the brightness enhancement film is provided with an optical adhesive layer with uneven surface, the optical adhesive layer is completely coated on the lower surface of the PET substrate, light rays can be further scattered when passing through the optical adhesive layer of the upper brightness enhancement film, the light rays with stronger optical path rules in different areas are all scattered, the regularity of the optical path differences in the periphery and the central area is destroyed, the liquid crystal display finally shows relatively similar colors after the colors of the different optical path differences in the edge area and the central area are mixed, a yellow frame and a MURA are further avoided, the color integration effect of the liquid crystal display is improved, the probability of defective products of the liquid crystal display is reduced, the production and manufacturing cost of the liquid crystal display are also greatly reduced, and the product competitiveness of the liquid crystal display is improved, and the increasing quality requirements of enterprises are met.

In order to better understand the technical solutions of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings. The present utility model is described in detail below with reference to the drawings and the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Example 1

Referring to fig. 1 to 3, the lcd panel for avoiding MURA according to the present utility model includes a lower frame, a reflective sheet, a light guide plate, a diffusion film, a brightness enhancement film 1, a lower polarizer 2, a lower substrate 3, an upper substrate 4, an upper polarizer 5 and a cover plate 6 sequentially stacked from bottom to top, an LED lamp is disposed on one side of the light guide plate, a light blocking adhesive is disposed between the brightness enhancement film 1 and the lower polarizer 2, the brightness enhancement film 1 is a low-thickness brightness enhancement film 1, the brightness enhancement film 1 includes a PET substrate 11 and a prism structure layer 12 disposed on the PET substrate 11, and an optical adhesive layer 13 with uneven surface is disposed on the lower surface of the PET substrate 11.

Further, the thickness of the light enhancement film 1 is less than 100 μm.

Further, the thickness of the light enhancement film 1 was 80. Mu.m.

Example 2

Referring to fig. 4 and 5, in this embodiment, as a further optimization scheme of embodiment 1, a plurality of grooves 61 are formed on the upper surface of the cover plate 6 by etching, a plastic layer 62 is covered on the upper side of the cover plate 6, the plastic layer 62 is embedded in the plurality of grooves 61, the plastic layer 62 is covered on the upper side of the cover plate 6, the plurality of grooves 61 are formed on the upper surface of the cover plate 6 by etching, the plastic layer 62 can be embedded in the inner portions of the plurality of grooves 61, the grooves 61 formed by etching have a certain roughness on the inner surface of the grooves 61, and the surface of the grooves 61 with a certain roughness can promote the adhesion between the grooves 61 and the plastic layer 62, so as to reduce the possibility of separating the grooves 61 from the plastic layer 62. When the liquid crystal display screen collides or falls, the plastic layer 62 on the upper surface of the cover plate 6 can directly bear the action of external force, so that the external force can be prevented from directly acting on the cover plate 6, and as the plastic layer 62 can absorb most of energy, the rest external force acts on the cover plate 6 very weakly, so that the risk of cracking or damaging the cover plate 6 can be effectively reduced; and when the liquid crystal display receives the exogenic action, even external force effect is great, also can only harm the plastic layer 62 of apron 6 upper surface, and can not directly harm apron 6, consequently can avoid apron 6 to damage and lead to liquid crystal display unable normal use, bring better use experience for the user, improved liquid crystal display's anti-drop ability.

Referring to fig. 6, further, the shape of the groove 61 may be square or circular, the cross-sectional shape of the groove 61 may be a narrow-outside-and-wide-inside-opening slot, in this embodiment, the cross-sectional shape of the groove 61 is isosceles trapezoid, and the groove 61 is long, the isosceles trapezoid-shaped groove 61 may enable the plastic layer 62 to be tightly embedded into the groove 61, so as to avoid separation of the groove 61 and the plastic layer 62, thereby preventing the cover plate 6 and the plastic layer 62 from falling off, and the long groove 61 may increase the bonding portion between the plastic layer 62 and the groove 61, and further improve the bonding strength between the groove 61 and the plastic layer 62.

Further, the anti-fingerprint coating is arranged on the upper surface of the plastic layer 62, so that a user can avoid fingerprint residues on the surface of the plastic layer 62 in the use process, the aesthetic feeling of the liquid crystal display screen is improved, and the competitiveness of the product is improved.

Example 3

Referring to fig. 7, as a further optimization scheme of embodiment 1, in this embodiment, the backlight module further includes a frame 7 for carrying the lower polarizer 2, the lower substrate 3, the upper substrate 4 and the upper polarizer 5, wherein the upper substrate 4 and the lower substrate 3 are staggered with each other to form a step, a side wall 71 extends upward from an edge of the frame 7, at least two buckles 72 are provided on the side wall 71, and the buckles 72 buckle the step, so as to prevent the backlight module from being separated from the liquid crystal display module. In this embodiment, four buckles 72 symmetrical in pairs are used, but not limited thereto, and in other embodiments, only two buckles 72 may be used, but the stability is inferior to that of the four buckles 72 in this embodiment. The step where the buckle 72 buckles is a position where the upper surface of the lower substrate 3 is staggered from the upper substrate 4, wherein the upper substrate 4 is above the lower substrate 3. The lower substrate 3 includes a circuit area and a non-circuit area, and the position where the buckle 72 is buckled in this embodiment is preferably the non-circuit area, so as to prevent the circuit of the lower substrate 3 from being affected. The liquid crystal display screen provided by the utility model has the advantages of simple structure, mature process and low cost, can firmly fix the liquid crystal display module on the rubber frame 7, can be assembled by pressing the liquid crystal display module, is time-saving and labor-saving, has high assembly efficiency, and can effectively improve production efficiency.

Further, a gasket 8 is further arranged between the lower polarizer 2 and the rubber frame 7. The gasket 8 is preferably foam or sponge rubber, which not only plays a role in dust prevention between the liquid crystal display module and the backlight module, but also can ensure a buffering effect in the assembly process of the liquid crystal display module. In other embodiments, the sponge rubber can not only play the role, but also firmly adhere the backlight module and the liquid crystal display module, and further prevent the backlight module from being separated from the liquid crystal display module. More preferably, the thickness delta of the gasket 8 is more than or equal to 0.3mm, so that the gasket 8 has enough thickness to elastically deform while the liquid crystal display module plays a role in buffering, the elastic force generated by the elastic deformation can apply a certain pressure to the liquid crystal display screen, so that the liquid crystal display module can be clamped more firmly by the buckle 72, the gasket 8 has small elastic force when the thickness delta is too small, and cannot generate enough pressure to the liquid crystal display module, and the gasket is easy to fall off.

Referring to fig. 8, further, the upper surface of the spacer 8 is coated with a weak adhesive glue 81, and the lower surface of the spacer 8 is coated with a strong adhesive glue 82. The liquid crystal display module is attached to the upper surface of the gasket 8, the rubber frame 7 is attached to the lower surface of the gasket 8, the gasket 8 not only can play a role in buffering and dust prevention, but also can prevent the upper surface of the gasket 8 from pulling the lower polarizer 2 in the liquid crystal display screen to avoid MURA due to the fact that the lower surface of the gasket 8 is coated with the weak-viscosity glue 81, and further the lower polarizer 2 is prevented from deforming; meanwhile, the number of layers of the gasket 8 is small, and the gasket 8 can be prevented from falling off, so that the liquid crystal display screen is prevented from falling off.

Further, the glue viscosity of the weak-viscosity glue 81 and the glue viscosity of the strong-viscosity glue 82 are the same, the glue coating shape of the weak-viscosity glue 81 is a grid shape, and the glue coating shape of the strong-viscosity glue 82 is a complete coating. Because the glue viscosity of the weak-viscosity glue 81 is the same as that of the strong-viscosity glue 82, only one glue can be purchased, so that the purchasing quantity of the glue becomes large, further the purchasing cost is reduced, meanwhile, the glue cannot be mixed in the gluing process, the production efficiency is improved, the problem of wrong glue use is avoided, the coating shape of the weak-viscosity glue 81 is in a grid shape, the glue area of the weak-viscosity glue 81 is reduced, and the viscosity of the weak-viscosity glue 81 is reduced.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the embodiments described above are only some embodiments of the present application, but not all embodiments, the preferred embodiments of the present application are given in the drawings, but not limiting the patent scope of the present application. This application may be embodied in many different forms, but rather, embodiments are provided in order to provide a more thorough understanding of the present disclosure. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing, or equivalents may be substituted for elements thereof. All equivalent structures made by the specification and the drawings of the application are directly or indirectly applied to other related technical fields, and are also within the protection scope of the application.

Claims (10)

1. The utility model provides a avoid showing liquid crystal display of MURA, its characterized in that, it includes by lower frame, reflector plate, light guide plate, diffusion membrane, the brightness enhancement film (1), lower polaroid (2), lower base plate (3), upper base plate (4), last polaroid (5) and apron (6) that down to last sequential stack set up, one side of light guide plate is provided with the LED lamp, is located non-visual area brightness enhancement film (1) with be provided with the shading between lower polaroid (2), brightness enhancement film (1) be low thickness brightness enhancement film (1), brightness enhancement film (1) include PET base plate (11) and set up prismatic tooth structural layer (12) on PET base plate (11), the lower surface of PET base plate (11) is provided with surperficial uneven optical glue layer (13).

2. The liquid crystal display avoiding displaying MURA according to claim 1, characterized in that the thickness of the brightness enhancing film (1) is lower than 100 μm.

3. The liquid crystal display avoiding displaying MURA according to claim 2, characterized in that the thickness of the brightness enhancement film (1) is 80 μm.

4. The lcd panel for avoiding display of MURA according to claim 1, wherein the upper surface of the cover plate (6) is formed with a plurality of grooves (61) by etching, and the cover plate (6) is covered with a plastic layer (62) on top thereof, and the plastic layer (62) is embedded in a plurality of the grooves (61).

5. The lcd panel of claim 4, wherein the recess (61) is a narrow-outside-wide-inside-narrow-neck recess.

6. The lcd panel of claim 4, wherein the plastic layer (62) has an anti-fingerprint coating on its upper surface.

7. The liquid crystal display screen for avoiding displaying the MURA according to claim 1, further comprising a rubber frame (7) for bearing the lower polarizer (2), the lower substrate (3), the upper substrate (4) and the upper polarizer (5), wherein the upper substrate (4) and the lower substrate (3) are placed in a staggered manner to form a step, a side wall (71) extends upwards from the edge of the rubber frame (7), at least two buckles (72) are arranged on the side wall (71), and the buckles (72) buckle the step.

8. The lcd panel of claim 7, wherein a spacer (8) is further provided between the lower polarizer (2) and the frame (7).

9. The lcd panel of claim 8, wherein the upper surface of the spacer (8) is coated with a weak adhesive glue (81) and the lower surface of the spacer (8) is coated with a strong adhesive glue (82).

10. The lcd panel of claim 9, wherein the weak adhesive glue (81) and the Jiang Nianxing glue (82) have the same glue viscosity, the weak adhesive glue (81) has a mesh-like glue coating shape, and the Jiang Nianxing glue (82) has a full-coated glue coating shape.

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