Display screen protective film

Abstract

The utility model relates to the technical field of protective films, in particular to a display screen protective film which comprises a base material layer, and at least one first cholesteric liquid crystal layer and / or a second cholesteric liquid crystal layer are / is stacked on at least one side of the base material layer. The first cholesteric liquid crystal layer is a near-infrared cholesteric liquid crystal layer, and the second cholesteric liquid crystal layer is a blue or bluish violet cholesteric liquid crystal layer; according to the utility model, the protective film has an anti-blue light effect, protects a user from being polluted by blue light, has a gorgeous effect, and improves the use experience.

Description

Technical Field

[0001] The utility model relates to the technical field of protective films, in particular to a display screen protective film. Background Art

[0002] There are various types of screen protection films popular on the market, most of which are functional films, such as tempered films, semi-transparent black privacy films, and anti-Toray blue light films.

[0003] However, when the display screen is not displaying, the above protective films all appear black and lack brilliant colors. As people's usage needs increase, the existing protective films can no longer meet people's usage experience. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a display screen protective film, so that when in use, the protective film can have an anti-blue light effect to protect users from blue light pollution, and at the same time can make the protective film have a gorgeous effect to enhance the user experience.

[0005] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0006] A display screen protective film comprises a substrate layer, at least one side of which is laminated with at least one first cholesteric liquid crystal layer and / or at least one second cholesteric liquid crystal layer;

[0007] The first cholesteric liquid crystal layer is a near-infrared cholesteric liquid crystal layer, and the second cholesteric liquid crystal layer is a blue or blue-violet cholesteric liquid crystal layer.

[0008] The utility model provides a display screen protective film, further, the central wavelength of the first cholesteric liquid crystal layer is 680-900nm, and the reflectivity is greater than or equal to 30%; the central wavelength of the second cholesteric liquid crystal layer is 400-490nm, and the reflectivity is less than or equal to 48%.

[0009] The utility model provides a display screen protective film, further, the substrate layer is selected from any one of a PET film, a TPU film and a PC film.

[0010] The utility model provides a display screen protective film, further, at least one first cholesteric liquid crystal layer and / or at least one second cholesteric liquid crystal layer are laminated on both sides of the substrate layer.

[0011] The utility model provides a display screen protective film, further, a second cholesteric liquid crystal layer and at least one first cholesteric liquid crystal layer are laminated on both sides of the substrate layer.

[0012] The utility model provides a display screen protective film, further, at least one first cholesteric liquid crystal layer is laminated on one side of the substrate layer, and a second cholesteric liquid crystal layer is laminated on the other side of the substrate layer.

[0013] The utility model provides a display screen protective film, further comprising a second cholesteric liquid crystal layer and at least one first cholesteric liquid crystal layer stacked on one side of the substrate layer.

[0014] The utility model provides a display screen protective film, further, the thickness of the first cholesteric liquid crystal layer is 0-8 μm; the thickness of the second cholesteric liquid crystal layer is 0-2 μm.

[0015] The beneficial effects of the utility model are as follows: by arranging a near-infrared cholesteric liquid crystal layer and a blue or blue-violet cholesteric liquid crystal layer on the substrate layer, the utility model can make the protective film have an anti-blue light effect when in use, protecting the user from blue light pollution, and at the same time can make the protective film have a gorgeous effect, improving the use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a protective film provided in Embodiment 1 of the present utility model;

[0017] Figure 2 This is another schematic structural diagram of the protective film provided in the first embodiment of the utility model;

[0018] Figure 3 This is a schematic structural diagram of a protective film provided in Embodiment 2 of the present utility model;

[0019] Figure 4 This is another schematic structural diagram of the protective film provided in the second embodiment of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the first protective film provided in the third embodiment of the present utility model;

[0021] Figure 6 This is a second schematic structural diagram of the protective film provided in the third embodiment of the present utility model;

[0022] Figure 7 This is a third schematic structural diagram of the protective film provided in the third embodiment of the present utility model;

[0023] Figure 8 It is a schematic diagram of applying the protective film provided by the third embodiment of the utility model;

[0024] Explanation of the accompanying drawings: 1. substrate layer; 2. first cholesteric liquid crystal layer; 3. second cholesteric liquid crystal layer; 4. display screen; 5. adhesive; 6. tempered film. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0026] Embodiment 1: Figure 1 to Figure 2 As shown, a display screen protective film described in this embodiment includes a substrate layer 1 made of any one selected from PET film, TPU film and PC film, and a first cholesteric liquid crystal layer 2 and a second cholesteric liquid crystal layer 3 are coated or laminated on one side of the substrate layer 1. Specifically, the first cholesteric liquid crystal layer 2 is a near-infrared cholesteric liquid crystal layer, and the second cholesteric liquid crystal layer 3 is a blue or blue-violet cholesteric liquid crystal layer.

[0027] In actual use, due to the setting of the blue or blue-violet cholesteric liquid crystal layer, the blue light emitted by the display screen can be absorbed to protect the user's eyes from blue light pollution. At the same time, when looking at the protective film from the front, a faint blue or blue-violet light can be displayed. After the display screen is turned on, most of the blue or blue-violet light is absorbed, which does not affect the color display of the display screen.

[0028] When the protective film is viewed from the side, due to the provision of a near-infrared cholesteric liquid crystal layer and a blue or blue-purple cholesteric liquid crystal layer, and the use of the Bragg reflection effect of the cholesteric liquid crystal layer, the protective film can present a variety of color-changing effects such as gorgeous red, rose red, pink, gold, golden yellow or orange, making the protective film appear more colorful and enhancing the gorgeous effect of the protective film.

[0029] This embodiment arranges a near-infrared cholesteric liquid crystal layer and a blue or blue-violet cholesteric liquid crystal layer on the substrate layer 1, so that when in use, the protective film can have an anti-blue light effect to protect the user from blue light pollution, and at the same time can make the protective film have a gorgeous effect to enhance the user experience.

[0030] In this embodiment, a second cholesteric liquid crystal layer 3 and a first cholesteric liquid crystal layer 2 can be coated or laminated, or a second cholesteric liquid crystal layer 3 and two first cholesteric liquid crystal layers 2 can be coated or laminated. The number of layers of the first cholesteric liquid crystal layer 2 can also be set to three or more layers, which can be set according to actual design needs.

[0031] Preferably, the second cholesteric liquid crystal layer 3 is disposed between the substrate layer 1 and the first cholesteric liquid crystal layer 2. Of course, the first cholesteric liquid crystal layer 2 may also be disposed between the substrate layer 1 and the second cholesteric liquid crystal layer 3. This may be freely set according to actual design requirements.

[0032] In the display screen protective film described in this embodiment, the central wavelength of the first cholesteric liquid crystal layer 2 is 680-900nm, and the reflectivity is greater than or equal to 30%; the central wavelength of the second cholesteric liquid crystal layer 3 is 400-490nm, and the reflectivity is less than or equal to 48%. Through the above settings, the protective film is guaranteed to have a high gorgeous effect and improve the user experience.

[0033] In the display screen protective film described in this embodiment, the thickness of the first cholesteric liquid crystal layer 2 is 0-8 μm, and the thickness of the second cholesteric liquid crystal layer 3 is 0-2 μm. Through the above configuration, the protective film has high brilliance and a higher thickness, which improves the user experience.

[0034] Embodiment 2: Figure 3 to Figure 4 As shown, a display screen protective film described in this embodiment includes a substrate layer 1 made of any one selected from PET film, TPU film and PC film, a first cholesteric liquid crystal layer 2 is coated or laminated on one side of the substrate layer 1, and a second cholesteric liquid crystal layer 3 is coated or laminated on the other side of the substrate layer 1. Specifically, the first cholesteric liquid crystal layer 2 is a near-infrared cholesteric liquid crystal layer, and the second cholesteric liquid crystal layer 3 is a blue or blue-violet cholesteric liquid crystal layer.

[0035] Different from the first embodiment, the present embodiment respectively arranges a near-infrared cholesteric liquid crystal layer and a blue or blue-violet cholesteric liquid crystal layer on both sides of the substrate layer 1, that is, the near-infrared cholesteric liquid crystal layer and the blue or blue-violet cholesteric liquid crystal layer are distributed on both sides of the substrate layer 1, thereby having the same beneficial effects as those achieved in the first embodiment, which will not be described in detail here.

[0036] In this embodiment, a second cholesteric liquid crystal layer 3 and a first cholesteric liquid crystal layer 2 can be coated or laminated, or a second cholesteric liquid crystal layer 3 and two first cholesteric liquid crystal layers 2 can be coated or laminated. The number of layers of the first cholesteric liquid crystal layer 2 can also be set to three or more layers, which can be set according to actual design needs.

[0037] In the display screen protective film described in this embodiment, the central wavelength of the first cholesteric liquid crystal layer 2 is 680-900nm, and the reflectivity is greater than or equal to 30%; the central wavelength of the second cholesteric liquid crystal layer 3 is 400-490nm, and the reflectivity is less than or equal to 48%. Through the above settings, the protective film is guaranteed to have a high gorgeous effect and improve the user experience.

[0038] In the display screen protective film described in this embodiment, the thickness of the first cholesteric liquid crystal layer 2 is 0-8 μm, and the thickness of the second cholesteric liquid crystal layer 3 is 0-2 μm. Through the above configuration, the protective film has high brilliance and a higher thickness, which improves the user experience.

[0039] Embodiment 3: Figures 5 to 8 As shown, a display screen protective film described in this embodiment includes a substrate layer 1 made of any one selected from PET film, TPU film and PC film, and a second cholesteric liquid crystal layer 3 and a first cholesteric liquid crystal layer 2 are coated or laminated on both sides of the substrate layer 1. Specifically, the first cholesteric liquid crystal layer 2 is a near-infrared cholesteric liquid crystal layer, and the second cholesteric liquid crystal layer 3 is a blue or blue-violet cholesteric liquid crystal layer.

[0040] Different from the second embodiment, this embodiment provides a near-infrared cholesteric liquid crystal layer and a blue or blue-violet cholesteric liquid crystal layer on both sides of the substrate layer 1, so that the protective film has a more gorgeous effect and further improves the user experience.

[0041] In the present embodiment, a second cholesteric liquid crystal layer 3 and a first cholesteric liquid crystal layer 2 may be coated or laminated on both sides of the substrate layer 1, or a second cholesteric liquid crystal layer 3 and two first cholesteric liquid crystal layers 2 may be coated or laminated on both sides. The number of layers of the first cholesteric liquid crystal layer 2 may also be three or more, which may be set according to actual design requirements.

[0042] Preferably, the second cholesteric liquid crystal layer 3 is disposed between the substrate layer 1 and the first cholesteric liquid crystal layer 2. Of course, the first cholesteric liquid crystal layer 2 can also be disposed between the substrate layer 1 and the second cholesteric liquid crystal layer 3. In this way, it can be freely set according to actual design requirements.

[0043] In the display screen protective film described in this embodiment, the central wavelength of the first cholesteric liquid crystal layer 2 is 680-900nm, and the reflectivity is greater than or equal to 30%; the central wavelength of the second cholesteric liquid crystal layer 3 is 400-490nm, and the reflectivity is less than or equal to 48%. Through the above settings, the protective film is guaranteed to have a high gorgeous effect and improve the user experience.

[0044] In the display screen protective film described in this embodiment, the thickness of the first cholesteric liquid crystal layer 2 is 0-8 μm, and the thickness of the second cholesteric liquid crystal layer 3 is 0-2 μm. Through the above configuration, the protective film has high brilliance and a higher thickness, which improves the user experience.

[0045] The protective films of the first, second and third embodiments of the present invention can be used in combination with the existing anti-peeping films, thereby enhancing the gorgeous anti-peeping effect.

[0046] When used, the protective film of the first, second or third embodiment of the present invention can also be used as Figure 8As shown, the protective film provided in the third embodiment is bonded to the surface of the display screen 4 by means of adhesive 5, and then the tempered film 6 is bonded to the protective film provided in the third embodiment by means of adhesive 5, thereby protecting the protective film of the utility model and achieving a gorgeous use effect.

[0047] The above is only a preferred embodiment of the present utility model, so any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the protection scope of the present utility model patent application.

Claims

1. A display screen protective film, characterized in that: including a substrate layer; A second cholesteric liquid crystal layer and at least one first cholesteric liquid crystal layer are stacked on one side of the substrate layer; or, at least one first cholesteric liquid crystal layer is stacked on one side of the substrate layer, and a second cholesteric liquid crystal layer is stacked on the other side of the substrate layer; or, a second cholesteric liquid crystal layer and at least one first cholesteric liquid crystal layer are stacked on both sides of the substrate layer; The first cholesteric liquid crystal layer is a near-infrared cholesteric liquid crystal layer, and the second cholesteric liquid crystal layer is a blue or blue-violet cholesteric liquid crystal layer.

2. A display screen protective film according to claim 1, characterized in that: The central wavelength of the first cholesteric liquid crystal layer is 680-900 nm, and the reflectivity is greater than or equal to 30%; the central wavelength of the second cholesteric liquid crystal layer is 400-490 nm, and the reflectivity is less than or equal to 48%.

3. The display screen protective film according to claim 1, characterized in that: The substrate layer is selected from any one of a PET film, a TPU film and a PC film.

4. The display screen protective film according to claim 1, characterized in that: The thickness of the first cholesteric liquid crystal layer is 0-8 μm; the thickness of the second cholesteric liquid crystal layer is 0-2 μm.

Images