Liquid crystal display screen capable of preventing lower polaroid from adsorbing brightness enhancement film

Abstract

The utility model discloses a liquid crystal display screen capable of preventing a lower polaroid from adsorbing a bright enhancement film, which comprises a backlight module and a liquid crystal display module arranged above the backlight module, and the backlight module comprises a lower frame, a reflector plate, a light guide plate, a diffusion film and the bright enhancement film which are sequentially overlapped from bottom to top, the liquid crystal display module comprises a lower polaroid, a lower substrate, an upper substrate and an upper polaroid which are sequentially stacked from bottom to top, the backlight module and the liquid crystal display module are pasted and fixed through shading glue, and the lower polaroid comprises a first TAC layer, a PVA layer, a second TAC layer and a PSA layer which are sequentially stacked from bottom to top. The lower surface of the first TAC layer is uneven. Due to the fact that the lower surface of the first TAC layer is in an uneven surface type instead of a whole surface flat type in the prior art, the interference effect of a thin film is destroyed, adsorption of the lower polaroid and the brightness enhancement film is reduced, and the problem of shadows caused by adsorption is avoided.

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 which can prevent a lower polarizer from absorbing a light-enhancing film. Background Art

[0002] The laminated structure of the liquid crystal display used in mobile phone displays is mainly composed of a cover plate, a liquid crystal display module and a backlight module from top to bottom. The backlight is composed of a light-enhancing film, a diffusion film, a light guide plate, a reflective film, a glue iron frame and a light LED from top to bottom. The backlight module and the liquid crystal display module are bonded together by the surrounding frame glue of the backlight module. The thickness of the light-enhancing film is very thin, usually only about 80μm. Since the lower polarizer and the backlight film material inevitably carry a certain amount of static electricity, these static electricity will cause the light-enhancing film in the center area to deform slightly and adsorb to the lower polarizer to produce film interference. When the light-enhancing film is slightly deformed and the film is uneven, the light travels in a different path, and the interference rainbow pattern is tortuous, which will form an adsorbed shadow and produce uneven light and dark. That is, the optical path difference between the edge and the middle area of ​​the LCD viewing area is different, resulting in the final display of the edge and center of the LCD display. The color has a bright and dark color difference visual effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to avoid interference caused by adsorption between the brightness enhancement film and the lower polarizer, thereby avoiding the occurrence of uneven brightness.

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

[0005] To solve the above technical problems, the utility model provides a liquid crystal display screen that prevents a lower polarizer from absorbing a brightening film, comprising a backlight module and a liquid crystal display module arranged above the backlight module, the backlight module comprising a lower frame, a reflective sheet, a light guide plate, a diffusion film and a brightening film stacked in sequence from bottom to top, the liquid crystal display module comprising a lower polarizer, a lower substrate, an upper substrate and an upper polarizer stacked in sequence from bottom to top, the backlight module and the liquid crystal display module are fixed by means of a light-shielding adhesive, the lower polarizer comprises a first TAC layer, a PVA layer, a second TAC layer and a PSA layer stacked in sequence from bottom to top, and the lower surface of the first TAC layer is uneven.

[0006] As a preferred embodiment of the liquid crystal display screen provided by the utility model for preventing the lower polarizer from adsorbing the brightening film, the lower frame includes a bottom plate and a side wall extending upward from the edge of the bottom plate, and at least one elastic block is provided between the side of the light guide plate away from the light incident side and the side wall.

[0007] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film provided by the utility model, at least one protrusion is provided on both sides of the elastic block.

[0008] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film provided by the utility model, the elastic block is provided with a shock absorbing hole between adjacent protrusions.

[0009] As a preferred embodiment of the liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film provided by the utility model, placement grooves are provided on the inner wall of the shock absorbing hole close to the side of the protrusion, and shock absorbing devices are provided between adjacent placement grooves.

[0010] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film provided by the utility model, the shock absorbing device is a spring or two magnets with the same poles facing each other.

[0011] As a preferred embodiment of the liquid crystal display screen provided by the utility model for preventing the lower polarizer from adsorbing the brightening film, a cover plate is fixed above the liquid crystal display module by OCA optical glue, and a plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the top of the cover plate, and the plastic layer is embedded in the plurality of grooves.

[0012] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film provided by the utility model, the shape of the groove is square or circular.

[0013] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film provided by the utility model, the groove is a closing groove that is narrow on the outside and wide on the inside.

[0014] As a preferred implementation of the liquid crystal display screen for preventing the lower polarizer from adsorbing the brightness enhancement film provided by the utility model, the cross-sectional shape of the groove is an isosceles trapezoid.

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

[0016] Since the lower surface of the first TAC layer is coated with an uneven surface instead of the entire flat surface using traditional technology, the thin film interference effect is destroyed, reducing the adsorption of the lower polarizer and the brightening film, thereby avoiding the shadow problem caused by adsorption and avoiding the bright and dark color difference visual effects at the edge and center of the LCD screen, thereby improving the display consistency and enhancing 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 1 The utility model provides a structural schematic diagram of a liquid crystal display screen for preventing a lower polarizer from absorbing a brightness enhancement film.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle and lower polarizers.

[0020] Figure 3 for Figure 2 Schematic diagram of the structure of the first TAC layer.

[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 elastic block.

[0023] Figure 6 This is a schematic diagram of the structure of Example 3.

[0024] Figure 7 for Figure 6 Schematic diagram of the improved structure at the middle cover.

[0025] Figure 8 for Figure 7 Schematic diagram of the decomposition structure.

[0026] Fig. 9 for Figure 7 Schematic diagram of the improved structure.

[0027] Description of Figure Numbers:

[0028] Backlight module 100; liquid crystal display module 200; lower frame 1; light guide plate 2; diffusion film 3; light enhancement film 4; lower polarizer 5; lower substrate 6; light shielding glue 7; first TAC layer 51; PVA layer 52; second TAC layer 53; PSA layer 54;

[0029] Bottom plate 11; side wall 12; elastic block 8; protrusion 81; shock absorbing hole 82; placement groove 83; shock absorbing device 84;

[0030] Cover plate 9; plastic layer 10; groove 91. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The utility model provides a liquid crystal display screen for preventing a lower polarizer from absorbing a light-enhancing film, comprising a backlight module and a liquid crystal display module arranged above the backlight module, the backlight module comprising a lower frame, a reflective sheet, a light guide plate, a diffusion film and a light-enhancing film which are sequentially stacked from bottom to top, the liquid crystal display module comprising a lower polarizer, a lower substrate, an upper substrate and an upper polarizer which are sequentially stacked from bottom to top, the backlight module and the liquid crystal display module are fixed by light-shielding adhesive, the lower polarizer comprises a first TAC layer, a PVA layer, a second TAC layer and a PSA layer which are sequentially stacked from bottom to top, and the lower surface of the first TAC layer is uneven.

[0035] Since the lower surface of the first TAC layer is coated with an uneven surface instead of the entire flat surface using traditional technology, the thin film interference effect is destroyed, reducing the adsorption of the lower polarizer and the brightening film, thereby avoiding the shadow problem caused by adsorption and avoiding the bright and dark color difference visual effects at the edge and center of the LCD screen, thereby improving the display consistency and enhancing the competitiveness of the product.

[0036] 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.

[0037] Example 1

[0038] See also Figures 1 to 3 , a liquid crystal display screen for preventing a lower polarizer from absorbing a brightness enhancement film provided by the utility model, comprises a backlight module 100 and a liquid crystal display module 200 arranged above the backlight module 100, the backlight module 100 comprises a lower frame 1, a reflective sheet, a light guide plate 2, a diffusion film 3 and a brightness enhancement film 4 which are sequentially stacked from bottom to top, the liquid crystal display module 200 comprises a lower polarizer 5, a lower substrate 6, an upper substrate and an upper polarizer which are sequentially stacked from bottom to top, the backlight module 100 and the liquid crystal display module 200 are fixed by a light-shielding adhesive 7, the lower polarizer 5 comprises a first TAC layer 51, a PVA layer 52, a second TAC layer 53 and a PSA layer 54 which are sequentially stacked from bottom to top, and the lower surface of the first TAC layer 51 is uneven. Since the lower surface of the first TAC layer 51 is coated with an uneven surface instead of the whole-surface flat type by traditional technology, the thin film interference effect is destroyed, and the adsorption of the lower polarizer 5 and the brightening film 4 is reduced, thereby avoiding the shadow problem caused by the adsorption and avoiding the bright and dark color difference visual effects at the edge and center of the liquid crystal display, thereby improving the consistency of the display effect and enhancing the competitiveness of the product.

[0039] The prism protrusions can be designed with uneven heights in the y direction, and the heights of the same prism itself can vary unevenly along the x direction; thereby, on the entire plane, there is a certain distance between the lower polarizer 5 and the brightness enhancement film 4 to avoid adsorption together.

[0040] Example 2

[0041] See also Figure 4 and Figure 5 As a further optimization scheme of Example 1, in this embodiment, the lower frame 1 includes a bottom plate 11 and a side wall 12 extending upward from the edge of the bottom plate 11, and at least one elastic block 8 is provided between the side of the light guide plate 2 away from the light incident side and the side wall 12. The elastic block 8 can make the light guide plate 2 firmly abut against the elastic block 8, buffer the impact force of the light guide plate 2 on the lower frame 1, avoid the collision between the light guide plate 2 and the lower frame 1 and cause noise, and also can improve the service life of the light guide plate 2.

[0042] Furthermore, at least one protrusion 81 is provided on both sides of the elastic block 8, and the protrusion 81 directly abuts against the light guide plate 2 and the side wall 12 of the lower frame 1, which can align the elastic block 8 with the light guide plate 2 and the side wall 12, further improving the buffering performance of the elastic block 8.

[0043] As the elastic block 8 is used for a longer time, the elasticity of the elastic block 8 will also weaken due to aging. In order to increase the ability of the elastic block 8 to buffer the impact force and increase the service life of the elastic block 8, the elastic block 8 is provided with a shock-absorbing hole 82 between adjacent protrusions 81. In this embodiment, the shock-absorbing hole 82 is a square hole. When the light guide plate 2 hits the elastic block 8, the elastic block 8 will be concave and deformed in the direction of the shock-absorbing hole 82 to absorb the impact force of the light guide plate 2, thereby further achieving the purpose of shock absorption and noise reduction. It should be noted that the shock-absorbing hole 82 can be a through hole or a blind hole, or an inner hole built into the elastic block 8, which is not limited here and falls within the scope of protection of the utility model. The present embodiment uses a through hole, which is easy to manufacture and has a low production cost. The shape of the shock-absorbing hole 82 can be a square hole or a round hole, which can be selected according to actual conditions and is not limited here.

[0044] In order to further increase the ability of the elastic block 8 to buffer the impact force, a placement groove 83 is provided on the inner wall of the shock-absorbing hole 82 close to the side of the protrusion 81. In this embodiment, there are only two protrusions 81, so there are only two placement grooves 83. It is possible to set multiple protrusions 81 and multiple placement grooves 83 according to actual conditions. A shock-absorbing device 84 is provided between adjacent placement grooves 83. The shock-absorbing device 84 can be used to further increase the ability of the elastic block 8 to buffer the impact force and absorb the impact force of the light guide plate 2, thereby further achieving the purpose of shock absorption and noise reduction.

[0045] Furthermore, the shock absorbing device 84 is any one of a spring or two magnets with the same poles facing each other. The elastic force of the spring or the repulsive force generated by the two magnets with the same poles facing each other is used to further increase the ability of the elastic block 8 to buffer the impact force. The spring and magnet are standard commodities that can be purchased on the market, and no special customization is required. The procurement cost is low and can be replaced at any time, which is cost-effective.

[0046] Example 3

[0047] See also Figures 6 to 9As a further optimization scheme of Example 1, in this embodiment, a cover plate 9 is fixed on the top of the liquid crystal display module 200 by OCA optical adhesive, and the upper surface of the cover plate 9 is covered with a plastic layer 10. The upper surface of the cover plate 9 is etched to form a plurality of grooves 91 downward, and a portion of the lower surface of the plastic layer 10 is embedded in each groove 91. Since the surface of the groove 91 formed by etching has a certain degree of roughness, the plastic layer 10 can be tightly bonded to the groove 91 to prevent the cover plate 9 and the plastic layer 10 from falling off. Since the top of the cover plate 9 is covered with a plastic layer 10, and the upper surface of the cover plate 9 is etched to form a plurality of grooves 91, and the plastic layer 10 can be embedded in the interior of the plurality of grooves 91, the grooves 91 formed by etching make the inner surface of the grooves 91 have a certain degree of roughness. The surface of the groove 91 with a certain degree of roughness can improve the bonding force between the groove 91 and the plastic layer 10, thereby reducing the possibility of separation of the groove 91 and the plastic layer 10. When the LCD screen is collided or dropped, the plastic layer 10 on the upper surface of the cover plate 9 can directly withstand the external force, thereby preventing the external force from directly acting on the cover plate 9. Since the plastic layer 10 can absorb most of the energy, the remaining external force is very weak when it acts on the cover plate 9, thereby effectively reducing the risk of the cover plate 9 being broken or damaged; and when the LCD screen is subjected to external force, even if the external force is large, it will only damage the plastic layer 10 on the upper surface of the cover plate 9, and will not directly damage the cover plate 9. Therefore, it can be avoided that the cover plate 9 is damaged and the LCD screen cannot be used normally, which brings a better user experience to users and improves the anti-fall ability of the LCD screen.

[0048] Furthermore, the shape of the groove 91 can be square or circular, and the cross-sectional shape of the groove 91 can be a closing groove that is narrow on the outside and wide on the inside. In the present embodiment, the cross-sectional shape of the groove 91 is an isosceles trapezoid, and the groove 91 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 91 can allow the plastic layer 10 to be tightly embedded in the groove 91, thereby preventing the groove 91 from separating from the plastic layer 10, thereby preventing the cover plate 9 from falling off from the plastic layer 10. The elongated groove 91 can increase the fitting portion between the plastic layer 10 and the groove 91, thereby increasing the fitting strength between the groove 91 and the plastic layer 10.

[0049] 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.

[0050] 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 preventing a lower polarizer from absorbing a brightness enhancement film, characterized in that: It includes a backlight module and a liquid crystal display module arranged above the backlight module, the backlight module includes a lower frame, a reflective sheet, a light guide plate, a diffusion film and a light-enhancing film which are stacked in sequence from bottom to top, the liquid crystal display module includes a lower polarizer, a lower substrate, an upper substrate and an upper polarizer which are stacked in sequence from bottom to top, the backlight module and the liquid crystal display module are fixed by light-shielding adhesive, the lower polarizer includes a first TAC layer, a PVA layer, a second TAC layer and a PSA layer which are stacked in sequence from bottom to top, and the lower surface of the first TAC layer is uneven.

2. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 1, characterized in that: The lower frame includes a bottom plate and a side wall extending upward from an edge of the bottom plate, and at least one elastic block is disposed between a side of the light guide plate away from the light incident side and the side wall.

3. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 2, characterized in that: At least one protrusion is disposed on both sides of the elastic block.

4. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 3, characterized in that: The elastic block is provided with a shock absorbing hole between adjacent protrusions.

5. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 4, characterized in that: The inner wall of the shock-absorbing hole close to one side of the protrusion is provided with a placement groove, and a shock-absorbing device is provided between adjacent placement grooves.

6. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 5, characterized in that: The shock absorbing device is a spring or two magnets with the same poles facing each other.

7. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 1, characterized in that: A cover plate is fixed on the top of the liquid crystal display module by OCA optical adhesive, a plurality of grooves are formed on the upper surface of the cover plate by etching, a plastic layer is covered on the top of the cover plate, and the plastic layer is embedded in the plurality of grooves.

8. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 7, characterized in that: The shape of the groove is square or circular.

9. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 7, characterized in that: The groove is a closing groove which is narrow outside and wide inside.

10. The liquid crystal display screen for preventing the lower polarizer from absorbing the brightness enhancement film according to claim 9, characterized in that: The cross-sectional shape of the groove is an isosceles trapezoid.

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