Liquid crystal display device capable of reducing reflected interference light in liquid crystal box

Abstract

The utility model discloses a liquid crystal display device capable of reducing reflected interference light in a liquid crystal box, which comprises an upper glass component, a lower glass component and a backlight source, the liquid crystal box is arranged between the upper glass component and the lower glass component, and a rubber frame is arranged on the periphery of the liquid crystal box. The upper glass assembly comprises an upper glass substrate, a color filter is arranged on the lower surface of the upper glass substrate, the lower glass assembly comprises a lower glass substrate, a TFT (thin film transistor) layer is arranged on the upper surface of the lower glass substrate, an anti-reflection film is arranged on the lower surface of the color filter, and the color filter is arranged on the lower surface of the anti-reflection film. And the anti-reflection film faces the liquid crystal box. After the light emitted by the backlight source passes through the liquid crystal box and reaches the anti-reflection film, the anti-reflection film effectively improves the transmittance of the light, greatly reduces the reflection of the light, prevents the light reaching the inner surface of the color filter from returning to other areas, reduces the generation of interference light, and improves the brightness display precision of the display screen.

Description

Technical Field

[0001] The utility model relates to a liquid crystal display device, and more specifically, to a liquid crystal display device for reducing reflected interfering light in a liquid crystal cell. Background Art

[0002] The structure of a liquid crystal display (LCD) is to place a liquid crystal cell between two parallel glass substrates. TFTs (thin film transistors) and other circuits are provided on the lower substrate glass, and a color filter (CF) is provided on the upper substrate glass. By changing the signals and voltages on the TFTs on the lower glass, the rotation direction of the liquid crystal molecules in the pixel area is controlled, so as to control whether the polarized light of each pixel point is emitted or not to achieve the display purpose. The upper glass CF is mainly composed of R, G, B color resistors, PS, and BM. BM is used to block the traces between the pixels on the lower glass and the TFT element area, so that light cannot pass through. The lower glass is mainly composed of TFT devices and various circuit traces. Between the upper and lower glasses, the liquid crystal in the pixel area is controlled, and the non-pixel area is blocked by CF BM, so as to realize the controlled display of the liquid crystal display screen to show the required pictures.

[0003] As Figure 7 shown, when the light entering the LCD cell reaches the CF through the optical rotation effect of the liquid crystal, a small amount of light is reflected back from the inner side of the CF to form interfering light S, and these interfering lights return to other areas of the CF through reflection or the optical rotation effect of the liquid crystal. This causes a change in the amount of the original set light in the corresponding area range, resulting in a certain change between the actual displayed gray-scale brightness in this area and the set value.

[0004] Chinese invention patent document CN102608805B discloses a reflective sheet for reflecting light emitted by a light source in a liquid crystal module. It is characterized in that the reflective sheet is a flat body, on which there is a linear structure that can divide the reflective sheet into several integrally connected blocks, and the linear structure penetrates through the upper and lower end faces of the reflective sheet; the linear structure includes a plurality of intermittently connected dotted lines; one side edge of the reflective sheet is an incident light side edge close to the light source, and the dotted lines include several vertical dotted lines perpendicular to the incident light side edge and several parallel dotted lines parallel to the incident light side edge; the shortest distance between the parallel dotted lines and the incident light side edge is greater than the shortest distance between the vertical dotted lines and the incident light side edge. The linear structure is a symmetric structure that is centrosymmetric about the center of the reflective sheet. Obviously, this patent divides the reflective sheet by the linear structure in the reflective sheet, so that a large-sized reflective sheet is divided into several small-sized and integrally connected blocks. In this way, the integrity of the reflective sheet is maintained, and the arching and wrinkling phenomenon caused by expansion of the reflective surface can be avoided, so that the light reflected by the reflective surface is relatively uniform, and the picture effect of the liquid crystal module is greatly improved, and there will be no shadow phenomenon on the picture. In addition, the cost, weight and thickness of the liquid crystal module can be greatly reduced. However, this structure cannot solve the existing interference light problem. Utility Model Content

[0005] Based on this, in view of the above technical problems, it is necessary to provide a liquid crystal display device that reduces the reflected interference light in the liquid crystal cell. The liquid crystal display device that reduces the reflected interference light in the liquid crystal cell includes an upper glass component, a lower glass component and a backlight source. A liquid crystal cell is provided between the upper glass component and the lower glass component, and a rubber frame is provided around the liquid crystal cell. The upper glass component includes an upper glass substrate, and a color filter is provided on the lower surface of the upper glass substrate. The lower glass component includes a lower glass substrate, and a TFT layer is provided on the upper surface of the lower glass substrate. An anti-reflection film is provided on the lower surface of the color filter, and the anti-reflection film faces the liquid crystal cell. After the light emitted by the backlight source passes through the liquid crystal cell and reaches the anti-reflection film, the anti-reflection film effectively improves the light transmittance, greatly reduces the light reflection, avoids the light reaching the inner surface of the color filter from being reflected back to other areas, reduces the generation of interference light, and makes the actual light flux reaching the color filter consistent with the desired light flux controlled by the theoretical circuit program, improving the display brightness accuracy of the display screen.

[0006] In order to solve the above technical problems, the present utility model adopts the following technical solutions:

[0007] A liquid crystal display device for reducing reflected interference light in a liquid crystal cell, characterized in that the liquid crystal display device for reducing reflected interference light in the liquid crystal cell comprises an upper glass component, a lower glass component and a backlight source, a liquid crystal cell is provided between the upper glass component and the lower glass component, and a rubber frame is provided around the liquid crystal cell.

[0008] The upper glass component comprises an upper glass substrate, a color filter is provided on the lower surface of the upper glass substrate, the lower glass component comprises a lower glass substrate, and a TFT layer is provided on the upper surface of the lower glass substrate.

[0009] An anti-reflection film is provided on the lower surface of the color filter, and the anti-reflection film faces the liquid crystal cell.

[0010] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, the thickness of the anti-reflection film is 0.2 mm to 0.5 mm.

[0011] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, the thickness of the anti-reflection film is 0.4 mm.

[0012] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, the extension area of the anti-reflection film is adapted to the liquid crystal cell.

[0013] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, a leak-proof bend is provided at the edge of the anti-reflection film, and the setting direction of the leak-proof bend is perpendicular to the extension direction of the anti-reflection film.

[0014] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, the thickness of the leak-proof bend is greater than that of the anti-reflection film.

[0015] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, a plurality of anti-reflection grooves are provided inside the anti-reflection film.

[0016] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, the anti-reflection grooves are serrated grooves.

[0017] As a preferred embodiment of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell provided by the present invention, the anti-reflection grooves are radial grooves.

[0018] As a preferred embodiment of the liquid crystal display device for reducing the reflected interference light in the liquid crystal cell provided by the present utility model, the depth of the anti-reflection groove is less than half of the thickness of the anti-reflection film.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] The present utility model provides a liquid crystal display device for reducing the reflected interference light in the liquid crystal cell. After the light emitted by the backlight source passes through the liquid crystal cell and reaches the anti-reflection film, the anti-reflection film effectively improves the light transmittance, greatly reduces the light reflection, avoids the light reaching the inner surface of the color filter from being returned to other areas, reduces the generation of interference light, so that the actual light flux reaching the color filter is consistent with the desired light flux controlled by the theoretical circuit program, and improves the display brightness accuracy of the display screen.

[0021] In addition, a leak-proof bend can be provided at the edge of the anti-reflection film, and the setting direction of the leak-proof bend is perpendicular to the extension direction of the anti-reflection film. The thickness of the leak-proof bend is greater than that of the anti-reflection film. After the light emitted by the backlight source passes through the liquid crystal cell and reaches the anti-reflection film, the leak-proof bend can effectively reduce the side leakage of the light, further improve the actual light flux of the color filter, and thus further improve the display brightness accuracy of the display screen.

[0022] In addition, a plurality of anti-reflection grooves can be provided on the inner side of the anti-reflection film. The anti-reflection grooves are sawtooth patterns. Or, the anti-reflection grooves are radial patterns. The depth of the anti-reflection grooves is less than half of the thickness of the anti-reflection film. By using the anti-reflection grooves on the inner side of the anti-reflection film, the reflected light can be locked inside the anti-reflection grooves, further effectively reducing the light reflection, further improving the actual light flux of the color filter, and thus further improving the display brightness accuracy of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the solutions in the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the liquid crystal display device for reducing the reflected interference light in the liquid crystal cell of the present utility model;

[0025] Figure 2 It is a schematic hierarchical structure diagram of the liquid crystal display device for reducing the reflected interference light in the liquid crystal cell of the present utility model;

[0026] Figure 3For Figure 2 A detailed enlarged schematic view of area A of a liquid crystal display device for reducing reflected interference light in a liquid crystal cell in

[0027] Figure 4 A hierarchical structure schematic view of another embodiment of the liquid crystal display device of the present utility model for reducing reflected interference light in a liquid crystal cell;

[0028] Figure 5 For Figure 4 A detailed enlarged schematic view of area B of the liquid crystal display device for reducing reflected interference light in the liquid crystal cell in

[0029] Figure 6 A hierarchical structure schematic view of yet another embodiment of the liquid crystal display device of the present utility model for reducing reflected interference light in a liquid crystal cell;

[0030] Figure 7 A structural schematic view of an existing liquid crystal display device;

[0031] The markings in the figure are explained as follows: 1. Upper glass assembly; 11. Upper glass substrate; 12. Color filter; 13. Anti-reflection film; 131. Leakage-proof bend; 132. Anti-reflection groove; 2. Lower glass assembly; 21. TFT layer; 22. Lower glass substrate; 3. Liquid crystal cell; 4. Rubber frame; 5. Backlight source. Specific embodiments

[0032] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] As described in the background art, for a liquid crystal display, the structure of a liquid crystal display (LCD) is to place a liquid crystal cell between two parallel glass substrates. A TFT (thin film transistor) and other circuits are provided on the lower glass substrate, and a color filter (CF) is provided on the upper glass substrate. By changing the signals and voltages on the TFT on the lower glass, the rotation direction of the liquid crystal molecules in the pixel region is controlled, so as to control whether the polarized light of each pixel point is emitted or not to achieve the display purpose. The upper glass CF mainly consists of R, G, B color resistors, PS, and BM. BM is used to block the wiring between the pixels on the lower glass and the TFT element area, so that light cannot pass through from here. The lower glass mainly consists of TFT devices and various circuit traces. Between the upper and lower glass, the liquid crystal in the pixel region is controlled, and the non-pixel region is blocked by CF BM, so as to realize the controlled display of the liquid crystal display screen to display the required picture. When the light entering the LCD cell reaches the CF through the optical rotation effect of the liquid crystal, a small amount of light is reflected back from the inner side of the CF to form interfering light S, and these interfering lights return to other areas of the CF through reflection or the optical rotation effect of the liquid crystal. This causes a change in the original set light amount within the corresponding area range, resulting in a certain change between the actual displayed gray-scale brightness of this area and the set value.

[0034] To solve this technical problem, the present utility model provides a liquid crystal display device for reducing the reflected interfering light in the liquid crystal cell, which includes an upper glass component 1, a lower glass component 2, and a backlight source 5. A liquid crystal cell 3 is provided between the upper glass component 1 and the lower glass component 2, and a rubber frame 4 is provided around the liquid crystal cell 3. The upper glass component 1 includes an upper glass substrate 11, and a color filter 12 is provided on the lower surface of the upper glass substrate 11. The lower glass component 2 includes a lower glass substrate 22, and a TFT layer 21 is provided on the upper surface of the lower glass substrate 22. An anti-reflection film 13 is provided on the lower surface of the color filter 12, and the anti-reflection film 13 faces the liquid crystal cell 3.

[0035] Through the above structural design, after the light 51 emitted by the backlight source 5 passes through the liquid crystal cell 3 and reaches the anti-reflection film 13, the anti-reflection film 13 effectively improves the light transmittance, greatly reduces the light reflection, avoids the light reaching the inner surface of the color filter 12 from being returned to other areas, reduces the generation of interfering light, and makes the actual light flux reaching the color filter 12 consistent with the desired light flux controlled by the theoretical circuit program, improving the brightness display accuracy of the display screen.

[0036] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0037] It should be noted that, without conflict, the embodiments and the features and technical solutions in the embodiments in the present utility model can be combined with each other.

[0038] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] Embodiment 1

[0040] As Figure 4 shown, the liquid crystal display device for reducing the reflected interference light in the liquid crystal cell includes an upper glass component 1, a lower glass component 2, and a backlight source 5. A liquid crystal cell 3 is provided between the upper glass component 1 and the lower glass component 2, and a rubber frame 4 is provided around the liquid crystal cell 3.

[0041] The upper glass component 1 includes an upper glass substrate 11, and a color filter 12 is provided on the lower surface of the upper glass substrate 11. The lower glass component 2 includes a lower glass substrate 22, and a TFT layer 21 is provided on the upper surface of the lower glass substrate 22.

[0042] It should be noted that an anti-reflection film 13 is provided on the lower surface of the color filter 12, and the anti-reflection film 13 faces the liquid crystal cell 3.

[0043] In addition, the thickness of the anti-reflection film 13 is 0.2 mm to 0.5 mm. Preferably, the thickness of the anti-reflection film 13 is 0.4 mm.

[0044] It should be noted that the extension area of the anti-reflection film 13 is adapted to the liquid crystal cell 3.

[0045] The working mode of this embodiment will be described below.

[0046] As Figure 4 shown, after the light 51 emitted by the backlight source 5 passes through the liquid crystal cell 3 and reaches the anti-reflection film 13, the anti-reflection film 13 effectively improves the light transmittance, greatly reduces the light reflection, avoids the light reaching the inner surface of the color filter 12 from being returned to other areas, reduces the generation of interference light, so that the actual light flux reaching the color filter 12 is consistent with the desired light flux controlled by the theoretical circuit program, and improves the display brightness accuracy of the display screen.

[0047] Embodiment 2

[0048] As Figure 7As shown in the figure, the liquid crystal display device provided in Embodiment 1 for reducing the reflected interference light in the liquid crystal cell is further optimized. Specifically, a leak-proof bend 131 is provided at the edge of the anti-reflection film 13, and the setting direction of the leak-proof bend 131 is perpendicular to the extension direction of the anti-reflection film 13.

[0049] It should be noted that the thickness of the leak-proof bend 131 is greater than that of the anti-reflection film 13.

[0050] The working mode of this embodiment will be described below.

[0051] After the light 51 emitted by the backlight source 5 passes through the liquid crystal cell 3 and reaches the anti-reflection film 13, the leak-proof bend 131 can effectively reduce the side leakage of the light 51, further improving the actual light flux of the color filter 12, and thus further improving the display brightness accuracy of the display screen.

[0052] Embodiment 3

[0053] The liquid crystal display device provided in Embodiment 1 or 2 for reducing the reflected interference light in the liquid crystal cell is further optimized. Specifically, a plurality of anti-reflection grooves 132 are provided on the inner side of the anti-reflection film 13.

[0054] It should be noted that the anti-reflection grooves 132 are sawtooth patterns. Alternatively, the anti-reflection grooves 132 are radial patterns.

[0055] In addition, the depth of the anti-reflection grooves 132 is less than half of the thickness of the anti-reflection film 13.

[0056] The working mode of this embodiment will be described below.

[0057] By using the anti-reflection grooves 132 on the inner side of the anti-reflection film 13, the reflected light can be locked inside the anti-reflection grooves 132, further effectively reducing the light reflection, further improving the actual light flux of the color filter 12, and thus further improving the display brightness accuracy of the display screen.

[0058] In addition, the transistor is a field effect transistor or a triode. When these transistors are field effect transistors, they can be N-type transistors (such as metal-oxide-semiconductor field effect transistors (N-Metal-Oxide-Semiconductor, NMOS)), or P-type metal-oxide-semiconductor field effect transistors, complementary metal oxide semiconductor field effect transistors and other circuit structure types.

[0059] The terms "coupled" and "coupled" involved in the embodiments of the present application should be understood in a broad sense. For example, it can refer to a direct physical connection, or an indirect connection realized through electronic devices, such as a connection realized through resistors, inductors, capacitors or other electronic devices.

[0060] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0061] Obviously, the embodiments described above are only a part of the embodiments of the present application, rather than all of them. The accompanying drawings show the preferred embodiments of the present application, but 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 disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacement on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present application in other related technical fields shall be within the scope of the patent protection of the present application by the same token.

Claims

1. A liquid crystal display device for reducing reflected interference light in a liquid crystal cell, characterized in that: The liquid crystal display device for reducing reflected interference light in a liquid crystal box comprises an upper glass assembly (1), a lower glass assembly (2) and a backlight source (5), a liquid crystal box (3) is arranged between the upper glass assembly (1) and the lower glass assembly (2), and a plastic frame (4) is arranged around the periphery of the liquid crystal box (3). The upper glass assembly (1) comprises an upper glass substrate (11), a color filter (12) being provided on the lower surface of the upper glass substrate (11); the lower glass assembly (2) comprises a lower glass substrate (22), a TFT layer (21) being provided on the upper surface of the lower glass substrate (22); An anti-reflection film (13) is provided on the lower surface of the color filter (12), and the anti-reflection film (13) faces the liquid crystal box (3).

2. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 1, characterized in that: The thickness of the anti-reflection film (13) is 0.2 mm to 0.5 mm.

3. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 2, characterized in that: The thickness of the anti-reflection film (13) is 0.4 mm.

4. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 1, characterized in that: The extended area of ​​the anti-reflection film (13) is adapted to the liquid crystal box (3).

5. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 1, characterized in that: The edge of the anti-reflection film (13) is provided with a leakage-proof bend (131), and the setting direction of the leakage-proof bend (131) is perpendicular to the extension direction of the anti-reflection film (13).

6. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 5, characterized in that: The thickness of the leakage-proof bend (131) is greater than that of the anti-reflection film (13).

7. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 1, characterized in that: A plurality of anti-reflection grooves (132) are arranged on the inner side of the anti-reflection film (13).

8. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 7, characterized in that: The anti-reflective grooves (132) are sawtooth grooves.

9. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 7, characterized in that: The anti-reflective grooves (132) are radial grooves.

10. The liquid crystal display device for reducing the interference light reflected in the liquid crystal cell according to claim 7, characterized in that: The depth of the anti-reflection grooves (132) is less than half the thickness of the anti-reflection film (13).

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