Liquid crystal display screen capable of improving color gamut

Abstract

The liquid crystal display screen comprises a lower polaroid, a lower substrate, an upper substrate, an upper polaroid and a cover plate which are sequentially arranged in an overlapped mode from bottom to top, quantum dot films are pasted on the lower surface of the cover plate through optical cement, the quantum dot films comprise the green light quantum dot film and the red light quantum dot film, and the green light quantum dot film and the red light quantum dot film are bonded on the lower surface of the cover plate through optical cement. The particle size of the quantum dot particles of the green light quantum dot film is 2-4nm, and the particle size of the quantum dot particles of the red light quantum dot film is 6-8nm; an ITO FILM is arranged on the lower surface of the quantum dot film, and an FPC is led out of the ITO FILM. The quantum dot films are adhered to the lower surface of the cover plate through the optical cement, the quantum dot films comprise the green light quantum dot film and the red light quantum dot film, and the quantum dot films excite more corresponding red light or green light after blue light encounters quantum dots, so that the component of the red light or green light is increased, and the light emitting efficiency is improved. Therefore, the color expression capability, namely the color gamut, of the liquid crystal display screen can be obviously improved, and the color expression capability can be improved by 30%-50% on the basis of the color gamut of the existing color gamut specification.

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 with improved color gamut. Background Art

[0002] TFT display screens not only have good display effects but also are economical in price, and are widely used in consumer products such as smart watches, smart bracelets, smart homes, and electronic cigarettes. The color gamut NTSC of current TFT smart watch modules is within the range of 60% - 70%. However, in order to pursue a higher color gamut NTSC, more costs need to be added in the solution. However, as a TFT display screen with high cost performance in the consumer category, it is difficult for people to accept high-cost products. Therefore, in order to meet the performance requirements of customer products, a more economical solution is needed to meet the needs.

[0003] For the smart watch project of the TFT module, the general color gamut NTSC parameter is 60% - 70%. However, with the increase of people's demands, people need to pursue products with a higher color gamut NTSC. However, in the current technology, it is difficult to improve further from the TFT glass and the backlight LED. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is how to improve the color gamut of the liquid crystal display screen.

[0005] The technical problem to be solved by the utility model is realized through the following technical solutions:

[0006] To solve the above technical problem, the utility model provides a liquid crystal display screen with improved color gamut, which includes a lower polarizer, a lower substrate, an upper substrate, an upper polarizer, and a cover plate that are sequentially stacked from bottom to top. A quantum dot film is pasted on the lower surface of the cover plate through an optical adhesive. The quantum dot film includes a green light quantum dot film and a red light quantum dot film. The quantum dot particle size of the green light quantum dot film is 2nm - 4nm, and the quantum dot particle size of the red light quantum dot film is 6nm - 8nm. An ITO FILM is arranged on the lower surface of the quantum dot film, and an FPC is led out from the ITO FILM.

[0007] As a preferred embodiment of the liquid crystal display screen with improved color gamut provided by the utility model, the quantum dot particle size of the green light quantum dot film is 3nm.

[0008] As a preferred embodiment of the liquid crystal display screen with improved color gamut provided by the utility model, the quantum dot particle size of the red light quantum dot film is 7nm.

[0009] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the FPC includes a non-bending area and bending areas provided on both sides of the non-bending area. The bending areas are provided with PI reinforcement plates and a plurality of vias, and the PI reinforcement plates completely cover the plurality of vias.

[0010] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the plurality of vias are arranged in a line segment shape.

[0011] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the FPC includes a lower protective film, a lower copper layer, a substrate layer, an upper copper layer, and an upper protective film which are sequentially arranged from bottom to top, and the PI reinforcement plate is arranged above the upper protective film.

[0012] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the PI reinforcement plate is a PI cover film.

[0013] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the thickness of the PI cover film is 0.1 mm.

[0014] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the PI reinforcement plate does not extend beyond the non-bending area.

[0015] As a preferred embodiment of the liquid crystal display screen for improving color gamut provided by the present utility model, the shape of the via is a round hole.

[0016] The present utility model has the following beneficial effects:

[0017] Since a quantum dot film is pasted on the lower surface of the cover plate through an optical adhesive, the quantum dot film includes a green light quantum dot film and a red light quantum dot film. The quantum dot film can newly excite more corresponding red light or green light after blue light encounters the quantum dots, increasing the component of red light or green light. Thus, the color performance ability of the liquid crystal display screen, that is, the color gamut, can be significantly improved. Usually, it can be improved by 30%-50% on the basis of the color gamut of the existing color gamut specifications, so as to improve the color gamut of the liquid crystal display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the solutions in the present application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1Schematic diagram of the structure of a liquid crystal display screen for improving color gamut provided by the present utility model.

[0020] Figure 2 It is Figure 1 Schematic diagram of the structure of the FPC in the middle.

[0021] Figure 3 Schematic diagram of the position of the via hole on the FPC.

[0022] Explanation of the reference numerals in the attached drawings:

[0023] Lower polarizer 1; lower substrate 2; upper substrate 3; upper polarizer 4; cover plate 5; optical adhesive 6; quantum dot film 7; ITO film 8; FPC 9;

[0024] Non-bending area 901; bending area 902; PI reinforcing plate 91; via hole 92; lower protective film 93; lower copper layer 94; substrate layer; upper copper layer 95; upper protective film 96. Specific embodiments

[0025] 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 in conjunction with 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.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", "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 specifically defined.

[0028] The utility model provides a liquid crystal display screen with an improved color gamut, which comprises a lower polarizer, a lower substrate, an upper substrate, an upper polarizer and a cover plate sequentially stacked from bottom to top. A quantum dot film is adhered to the lower surface of the cover plate through an optical adhesive. The quantum dot film comprises a green light quantum dot film and a red light quantum dot film. The quantum dot particles of the green light quantum dot film have a particle size of 2nm - 4nm, and the quantum dot particles of the red light quantum dot film have a particle size of 6nm - 8nm. An ITO FILM is arranged on the lower surface of the quantum dot film, and an FPC is led out from the ITO FILM.

[0029] Since a quantum dot film is adhered to the lower surface of the cover plate through an optical adhesive, and the quantum dot film comprises a green light quantum dot film and a red light quantum dot film, when blue light encounters the quantum dots in the quantum dot film, more corresponding red light or green light is newly excited, increasing the component of red light or green light. Thus, the color performance ability, i.e., the color gamut, of the liquid crystal display screen can be significantly improved. Usually, it can be improved by 30% - 50% based on the existing color gamut specification, thereby improving the color gamut of the liquid crystal display screen.

[0030] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0031] Embodiment 1

[0032] Please refer to Figure 1, a liquid crystal display screen for improving color gamut provided by the present utility model, which includes a lower polarizer 1, a lower substrate 2, an upper substrate 3, an upper polarizer 4, and a cover plate 5 sequentially stacked from bottom to top. A quantum dot film 7 is adhered to the lower surface of the cover plate 5 through an optical adhesive 6. The quantum dot film 7 includes a green light quantum dot film and a red light quantum dot film. The particle size of the quantum dot particles in the green light quantum dot film is 2nm - 4nm. In this embodiment, the particle size of the quantum dot particles in the green light quantum dot film is 3nm. The particle size of the quantum dot particles in the red light quantum dot film is 6nm - 8nm. In this embodiment, the particle size of the quantum dot particles in the red light quantum dot film is 7nm. An ITO FILM 8 is provided on the lower surface of the quantum dot film 7, and an FPC 9 is led out from the ITO FILM 8. Since the quantum dot film 7 is adhered to the lower surface of the cover plate 5 through the optical adhesive 6, and the quantum dot film 7 includes a green light quantum dot film and a red light quantum dot film, the quantum dot film 7 enables more corresponding red light or green light to be newly excited when blue light encounters the quantum dots, increasing the component of red light or green light, thereby significantly improving the color performance ability, i.e., the color gamut, of the liquid crystal display screen. Usually, it can be increased by 30% - 50% based on the color gamut of the existing color gamut specification, improving the color gamut of the liquid crystal display screen.

[0033] Embodiment 2

[0034] Please refer to Figure 2 and Figure 3 , as a further optimized solution of Embodiment 1, in this embodiment, the FPC 9 includes a non-bending area 901 and bending areas 902 provided on both sides of the non-bending area 901. PI reinforcing plates 91 and a plurality of vias 92 are provided on the bending areas 902. These vias 92 are bridges connecting the upper and lower copper layers, and their reliability is very important. The vias 92 cannot be under heavy pressure, are afraid of being scratched, and are even more afraid of being folded. Therefore, generally, vias 92 are not allowed in the general bending area 902 because the bending force will directly act on the vias 92, affecting the reliability of the vias 92. The PI reinforcing plates 91 completely cover the plurality of vias 92. A plurality of vias 92 are provided on the non-bending area 901. The vias 92 are relatively fragile and prone to stress concentration, resulting in fracture at the vias 92. Since the PI reinforcing plates 91 completely cover the vias 92, the stress is concentrated around the reinforcing plates rather than at the vias 92, preventing the risk of fracture at the vias 92 and avoiding the failure of the FPC 9.

[0035] Furthermore, the plurality of vias 92 are arranged in a line segment shape. Since there is a reinforcing plate that completely covers the vias 92, even if the vias 92 are arranged in a line segment shape, it can ensure that the vias 92 are not easily fractured, improving the designability of the product and enhancing the product competitiveness.

[0036] Furthermore, the FPC 9 includes a lower protective film 93, a lower copper layer 94, a substrate layer, an upper copper layer 95, and an upper protective film 96 sequentially arranged from bottom to top. The PI reinforcing plates 91 are provided above the upper protective film 96.

[0037] Further, the PI reinforcing plate 91 is a PI covering film, which has a lower cost and a simpler assembly process.

[0038] Further, the thickness of the PI covering film is 0.1 mm to ensure that the PI covering film has sufficient strength. The PI covering film is fixed by double-sided adhesive, and the thickness of the double-sided adhesive is 0.025 mm. The distance between the edge of the covering film and the via hole 92 is greater than 0.5 mm to ensure that the stress concentration area does not affect the via hole 92, prevent the risk of fracture at the via hole 92, and avoid the failure of the FPC9.

[0039] Further, the PI reinforcing plate 91 does not extend beyond the non-bending area 901. That is, the PI reinforcing plate 91 is disposed within the non-bending area 901 to prevent stress concentration at the bending area 902 and avoid fracture in the bending area 902.

[0040] Further, the shape of the via hole 92 is a round hole.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, 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.

[0042] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The 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 disclosure content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements 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 is equally within the scope of the patent protection of the present application.

Claims

1. A liquid crystal display screen with improved color gamut, characterized in that: It comprises a lower polarizer, a lower substrate, an upper substrate, an upper polarizer and a cover plate which are sequentially stacked from bottom to top. A quantum dot film is attached to the lower surface of the cover plate by optical adhesive. The quantum dot film comprises a green quantum dot film and a red quantum dot film. The quantum dot particle size of the green quantum dot film is 2nm-4nm, and the quantum dot particle size of the red quantum dot film is 6nm-8nm. An ITO FILM is arranged on the lower surface of the quantum dot film, and an FPC is led out from the ITO FILM.

2. The liquid crystal display screen with improved color gamut according to claim 1, characterized in that: The particle size of the quantum dot particles of the green light quantum dot film is 3 nm.

3. The liquid crystal display screen with improved color gamut according to claim 1, characterized in that: The particle size of the quantum dot particles of the red light quantum dot film is 7 nm.

4. The liquid crystal display screen with improved color gamut according to claim 1, characterized in that: The FPC includes a non-bending area and bending areas arranged on both sides of the non-bending area. A PI reinforcing plate and a plurality of vias are arranged on the bending area, and the PI reinforcing plate completely covers the plurality of vias.

5. The liquid crystal display screen with improved color gamut according to claim 4, characterized in that: A plurality of the via holes are arranged in a line segment shape.

6. The liquid crystal display screen with improved color gamut according to claim 4, characterized in that: The FPC comprises a lower protective film, a lower copper layer, a substrate layer, an upper copper layer and an upper protective film which are arranged in sequence from bottom to top, and the PI reinforcing plate is arranged above the upper protective film.

7. The liquid crystal display screen with improved color gamut according to claim 4, characterized in that: The PI reinforcing plate is a PI covering film.

8. The liquid crystal display screen with improved color gamut according to claim 7, characterized in that: The thickness of the PI covering film is 0.1 mm.

9. The liquid crystal display screen with improved color gamut according to claim 4, characterized in that: The PI reinforcing plate does not extend beyond the non-bending area.

10. The liquid crystal display screen with improved color gamut according to claim 4, characterized in that: The via hole is in the shape of a circular hole.

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