High-color-gamut liquid crystal display screen

Abstract

The utility model discloses a high color gamut liquid crystal display screen which comprises a liquid crystal display and a backlight module, the liquid crystal display comprises an upper glass substrate, a color filter film, a TFT, a quantum dot film layer and a lower glass substrate which are sequentially stacked from top to bottom; the backlight module is arranged on the side face, away from the quantum dot thin film layer, of the lower glass substrate. According to the utility model, the quantum dot film layer is added on the lower glass substrate, so that when a blue light part in light emitted by the backlight module passes through the lower glass substrate and reaches the quantum dot film layer, the blue light encounters the quantum dot film layer to excite more corresponding red light or blue light. In other words, through the quantum dot thin film layer, red and green components are added in light emitted by a conventional backlight module, so that the color gamut of the liquid crystal display screen is improved, the conventional mode of improving the color gamut through fluorescent powder is replaced, and the product cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a high color gamut liquid crystal display screen. Background Art

[0002] The higher the color saturation (color gamut) value of the display, the richer and more vivid the colors that the display can display. A display with a high color gamut can meet people's needs for warm colors.

[0003] The mainstream display used in existing display screens is liquid crystal display. The main factors affecting the color saturation of the display screen are the backlight module and the LCD liquid crystal display. Among them, the LCD display factor is mainly the CF (top color filter) in the LCD, and the backlight module factor is the LED lamp. Usually, in order to improve the color saturation, the manufacturer of the display screen will add LED phosphor components to the LED lamp. The phosphor is mainly nitride phosphor or KSF phosphor. Therefore, when it is needed, it is necessary to pay expensive fees, resulting in an increase in product costs. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a high color gamut liquid crystal display screen that can reduce costs.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A high color gamut liquid crystal display screen comprises: a liquid crystal display and a backlight module, wherein the liquid crystal display comprises an upper glass substrate, a color filter film, a TFT, a quantum dot film layer and a lower glass substrate, wherein the upper glass substrate, the color filter film, the TFT, the quantum dot film layer and the lower glass substrate are stacked in sequence from top to bottom; and the backlight module is arranged on a side of the lower glass substrate away from the quantum dot film layer.

[0007] In one embodiment, an adhesive frame glue is disposed between the upper glass substrate and the lower glass substrate, and the adhesive frame glue is disposed around four sides of the upper glass substrate.

[0008] In one embodiment, the thickness of the adhesive frame glue is 3 μm.

[0009] In one of the embodiments, an upper waterproof groove is etched on the side of the upper glass substrate facing the adhesive frame glue, and the adhesive frame glue is partially accommodated in the upper waterproof groove, and a lower waterproof groove is etched on the side of the lower glass substrate facing the adhesive frame glue, and the adhesive frame glue is partially accommodated in the lower waterproof groove.

[0010] In one embodiment, a liquid crystal layer is disposed between the color filter film and the TFT.

[0011] In one of the embodiments, a cover plate is further included, and the cover plate is disposed on a side of the liquid crystal display away from the backlight module.

[0012] In one of the embodiments, an optical adhesive layer is disposed between the cover plate and the liquid crystal display, and the optical adhesive layer is used to connect and fix the cover plate and the liquid crystal display.

[0013] In one embodiment, the optical adhesive layer is an OCA optical adhesive layer.

[0014] In one embodiment, the backlight module includes a backlight frame and a backlight film material. The backlight frame is provided with a receiving cavity, and the backlight film material is disposed in the receiving cavity.

[0015] In one embodiment, the backlight film material includes a reflective film, a light guide plate, a lower diffusion film, a lower light-enhancing film and an upper light-enhancing film. The reflective film, the light guide plate, the lower diffusion film, the lower light-enhancing film and the upper light-enhancing film are stacked in sequence from bottom to top in the accommodating cavity.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The high color gamut liquid crystal display screen of the utility model is provided with a liquid crystal display and a backlight module, and a quantum dot film layer is added to the lower glass substrate in the liquid crystal display. In this way, when the blue light part of the light emitted by the backlight module reaches the quantum dot film layer after passing through the lower glass substrate, the blue light encounters the quantum dot film layer and newly stimulates more corresponding red light or blue light, and these lights are then controlled by TFT and emitted from the color filter film, so as to display the corresponding picture. That is, through the quantum dot film layer, the red and green components are added to the light emitted by the conventional backlight module, so that the color expression of the liquid crystal display screen can be significantly improved, that is, the color gamut of the liquid crystal display screen is improved, and the conventional method of improving the color gamut through fluorescent powder is replaced, thereby reducing the cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 This is a schematic structural diagram of a high color gamut liquid crystal display screen in one embodiment of the utility model;

[0020] Figure 2 for Figure 1Schematic diagram of the structure of a liquid crystal display with a high color gamut liquid crystal display. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0022] See also Figure 1 and Figure 2 As shown, a high color gamut liquid crystal display screen 10 includes: a liquid crystal display 100 and a backlight module 200, the liquid crystal display 100 includes an upper glass substrate 110, a color filter film 120, a TFT (Thin Film Transistor) 130, a quantum dot film layer 140 and a lower glass substrate 150, the upper glass substrate 110, the color filter film 120, the TFT130, the quantum dot film layer 140 and the lower glass substrate 150 are stacked in sequence from top to bottom; the backlight module 200 is arranged on a side surface of the lower glass substrate 110 away from the quantum dot film layer 140.

[0023] It should be noted that when manufacturing the liquid crystal display 100, a quantum dot film layer 140 is first coated on the inner side of the lower glass substrate 150, and then the corresponding TFT 130 circuit is manufactured; and similarly, a color filter film 120 is coated on the upper film substrate 110. In this way, the upper glass substrate 110 and the lower glass substrate 150 with different functions are formed. Specifically, a quantum dot film layer 140 is coated on the inner side of the lower glass substrate 150, so that the blue light part of the light emitted by the backlight module 200 can pass through the lower glass substrate and reach the quantum dot film layer 140, and when the blue light encounters the quantum dots, more corresponding red light or green light will be newly stimulated, and these lights are then controlled by the TFT and emitted from the color filter film 120, so as to display the corresponding picture. That is, through the quantum dot film layer 140, the red or green component is added to the light of the conventional backlight module, so that the color difference expression of the liquid crystal display can be significantly improved, that is, the color gamut of the liquid crystal display can be improved, usually by 30% to 50% based on the existing color gamut specifications. It should also be noted that the quantum dot film layer is a semiconductor nanocrystal with a particle size of 1 to 10nm. The particle size determines the luminescence spectrum. Usually, quantum dots of about 3nm can emit green light after being excited by blue light, and quantum dots of about 7nm can emit red light after being excited by blue light. The quantum dot film layer can select the corresponding particle size according to actual needs; for example, if more green light is required, the particle diameter is selected to be smaller; if more red light is required, the particle diameter is selected to be larger.

[0024] Further, an adhesive frame glue 160 is provided between the upper glass substrate 110 and the lower glass substrate 150, and the adhesive frame glue 160 is provided around the four peripheries of the upper glass substrate 110. The upper glass substrate 110 and the lower glass substrate 150 are bonded and fixed by the adhesive frame glue 160. For example, the adhesive frame glue 160 can adopt the existing liquid sealing frame glue. In this embodiment, a liquid crystal layer is provided between the color filter film and the TFT. That is, the adhesive frame glue 160 is provided around the liquid crystal layer, and the upper glass substrate 110 and the lower glass substrate 150 with different functions are bonded into a box by the adhesive frame glue 160, and the box is filled with liquid crystal. The liquid crystal display forms an electric field through the circuit matrix on the TFT, and then controls the rotation angle of the liquid crystal through this electric field to control the amount of light passing through, so as to form different display images. Preferably, the thickness of the adhesive frame glue 160 is 3μm.

[0025] Furthermore, an upper waterproof groove is etched on the side of the upper glass substrate 110 facing the adhesive frame glue 160, and the adhesive frame glue 160 is partially accommodated in the upper waterproof groove, and a lower waterproof groove is etched on the side of the lower glass substrate 150 facing the adhesive frame glue 160, and the adhesive frame glue is partially accommodated in the lower waterproof groove.

[0026] It should be noted that after the upper glass substrate 110 has completed the production of its upper functional layer, for example, after the production of the color filter film is completed, an etching process can be used to etch an upper waterproof groove on the upper glass substrate 110, and the waterproof groove corresponds to the position of the adhesive frame 160; similarly, the lower glass substrate 150 forms the lower waterproof groove in the same way as the upper glass substrate 110 forms the upper waterproof groove; and the upper waterproof groove and the lower waterproof groove are arranged relative to each other up and down; because the adhesive frame glue 160 has fluidity, when it is attached, the adhesive frame glue 160 will be squeezed by the upper glass substrate 110 and the lower glass substrate 150 and filled into the upper waterproof groove and the lower waterproof groove, and then normal curing operation can be performed. The purpose of setting the upper waterproof groove and the lower waterproof groove is to extend the contact area between the adhesive frame glue 160 and the upper and lower glasses, thereby lengthening the path length of water vapor in the liquid crystal box, and then to a certain extent, it can reduce the water vapor entering the liquid crystal box and corroding the circuit.

[0027] Furthermore, the high color gamut liquid crystal display screen 10 also includes a cover plate 300, and the cover plate 300 is disposed on a side surface of the liquid crystal display 100 away from the backlight module 200. The cover plate 300 is located at the outermost layer of the liquid crystal display screen 10, and the liquid crystal display inside the liquid crystal display screen 10 is isolated and protected by the cover plate 300. In addition, a touch sensing functional layer can also be provided on the cover plate 300, so that the liquid crystal display screen has a touch sensing function. For example, an optical adhesive layer 400 is provided between the cover plate 300 and the liquid crystal display 100, and the optical adhesive layer 400 is used to connect and fix the cover plate 300 and the liquid crystal display 100. Preferably, the optical adhesive layer is an OCA optical adhesive layer, and the OCA optical adhesive has the properties of high light transmittance, high bonding strength and high temperature resistance, so the bonding quality can be ensured.

[0028] Furthermore, the backlight module 200 includes a backlight frame 210 and a backlight film 220. The backlight frame 210 is provided with a receiving cavity, and the backlight film 220 is arranged in the receiving cavity. The backlight film 220 ensures the uniformity and brightness of the light emitted by the backlight module 200, thereby improving the display effect. For example, the backlight film 220 includes a reflective film 221, a light guide plate 222, a lower diffusion film 223, a lower light enhancement film 224, and an upper light enhancement film 225. The reflective film 221, the light guide plate 222, the lower diffusion film 223, the lower light enhancement film 224, and the upper light enhancement film 225 are stacked in sequence from bottom to top in the receiving cavity. The light guide plate 222 guides the light; the reflective film 221 reflects the light to reduce the loss of the light; the lower diffusion film 223 makes the light diffuse evenly; the upper light enhancement film 224 and the lower light enhancement film 225 are used to increase the brightness of the light.

[0029] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high color gamut liquid crystal display, characterized in that: include: A liquid crystal display, comprising an upper glass substrate, a color filter film, a TFT, a quantum dot film layer and a lower glass substrate, wherein the upper glass substrate, the color filter film, the TFT, the quantum dot film layer and the lower glass substrate are stacked in sequence from top to bottom; and A backlight module is arranged on a side of the lower glass substrate away from the quantum dot film layer.

2. The high color gamut liquid crystal display according to claim 1, characterized in that: An adhesive frame glue is arranged between the upper glass substrate and the lower glass substrate, and the adhesive frame glue is arranged around the four peripheries of the upper glass substrate.

3. The high color gamut liquid crystal display according to claim 2, characterized in that: The thickness of the adhesive frame glue is 3 μm.

4. The high color gamut liquid crystal display according to claim 3, characterized in that: An upper waterproof groove is etched on one side of the upper glass substrate facing the adhesive frame glue, and the adhesive frame glue is partially accommodated in the upper waterproof groove. A lower waterproof groove is etched on one side of the lower glass substrate facing the adhesive frame glue, and the adhesive frame glue is partially accommodated in the lower waterproof groove.

5. The high color gamut liquid crystal display according to claim 1, characterized in that: A liquid crystal layer is arranged between the color filter film and the TFT.

6. The high color gamut liquid crystal display according to any one of claims 1 to 5, characterized in that: It also includes a cover plate, which is arranged on a side surface of the liquid crystal display away from the backlight module.

7. The high color gamut liquid crystal display according to claim 6, characterized in that: An optical adhesive layer is disposed between the cover plate and the liquid crystal display, and the optical adhesive layer is used to connect and fix the cover plate and the liquid crystal display.

8. The high color gamut liquid crystal display according to claim 7, characterized in that: The optical adhesive layer is an OCA optical adhesive layer.

9. The high color gamut liquid crystal display according to claim 1, characterized in that: The backlight module comprises a backlight frame and a backlight film material. The backlight frame is provided with a receiving cavity, and the backlight film material is arranged in the receiving cavity.

10. The high color gamut liquid crystal display according to claim 9, characterized in that: The backlight film material includes a reflective film, a light guide plate, a lower diffusion film, a lower brightness enhancement film and an upper brightness enhancement film. The reflective film, the light guide plate, the lower diffusion film, the lower brightness enhancement film and the upper brightness enhancement film are stacked in sequence from bottom to top in the accommodating cavity.

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