CN105353434B - A kind of optical thin film of anti-blue light - Google Patents

Abstract

The invention provides an anti-blue optical film, which comprises a first protective film, a transparent substrate, a second protective film and a release film in sequence, wherein at least one layer of microstructure is arranged in the transparent substrate, each layer There are multiple microstructures in the microstructure. The invention not only can effectively absorb the blue light by setting the microstructure in the optical film, but also can not affect the color gamut saturation of the display.

Description

An anti-blue optical film

technical field

The invention relates to the technical field of flat panel displays, in particular to an optical film for preventing blue light.

Background technique

With the popularization of electronic digital products, people cannot do without mobile phones, computers, LCD TVs and other equipment every day. The screens of these devices will emit a large amount of short-wave blue light with a wavelength between 380 nanometers and 500 nanometers. Short-wave blue light has high energy. , can increase eye fatigue, and seriously cause damage to photoreceptor cells in the macula of the eye and impaired vision. In order to reduce the damage of blue light, reflection, special material absorption, and quantum blue shift are often used to weaken blue light, but the reflection type will reduce the color gamut saturation of the display, and the absorption type of special materials will be limited by the material. However, the quantum blue shift method will still shift the frequency of the shorter wavelength to the blue light direction and the original brightness of the blue light will be increased to the red light, resulting in an increase in the brightness of the red light and causing eye damage.

Contents of the invention

In order to solve the problems in the prior art, the present invention provides an anti-blue light optical film, which can effectively absorb blue light without affecting the color gamut saturation of the display.

The invention provides an anti-blue optical film, which comprises a first protective film, a transparent substrate, a second protective film and a release film in sequence, and at least one layer of microstructure is arranged in the transparent substrate. The refractive index of the material of the microstructure must be greater than that of the transparent matrix. The microstructures are arranged in multiple rows in the transparent matrix, and each row is provided with a plurality of microstructures, wherein a row of microstructures is sequentially arranged between two microstructures in an adjacent row above. The microstructures are circular, quasi-circular or regular polygonal, with an average diameter of D, and an average distance between two adjacent microstructures of P, where P=2D. The diameter of the microstructures ranges from 435nm to 500nm, preferably 435nm in diameter. The first protective film and the second protective film are light-transmitting materials. The material of the transparent substrate is hexylene terephthalate or polycarbonate.

Beneficial effects: the present invention not only can effectively absorb blue light, but also does not affect the color gamut saturation of the display by arranging microstructures in the optical film.

Description of drawings

1 is a sectional view of the first embodiment of the optical film of the present invention;

2 is a top view of the first embodiment of the optical film of the present invention;

Fig. 3 is a cross-sectional view of the second embodiment of the optical film of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

The present invention provides an anti-blue optical film, as shown in Figure 1, the optical film comprises a first protective film 100, a transparent substrate 200, a second protective film 300 and a release film 400, the transparent substrate 200 There is a microstructure 201 in it. FIG. 2 is a top view of the first embodiment of the optical film of the present invention. The microstructures 201 are arranged in multiple rows in the transparent substrate 200, and each row is provided with a plurality of microstructures 201. Among them, a certain row of microstructures 201 is arranged in sequence. between the two microstructures 201 in the adjacent upper row. According to the principle of Rayleigh scattering, particles with a radius much smaller than the wavelength of light have a scattering effect on incident light, and the scattered light intensity is inversely proportional to the fourth power of the wavelength, that is, light with a shorter wavelength is easier to scatter. The diameter of the microstructure 201 is in the range of 435nm to 500nm, preferably 435nm in diameter. The microstructures 201 are circular, with an average diameter of D, and an average distance between two adjacent microstructures 201 is P, where P=2D. The shape of the microstructure 201 is not limited to a circle, and may also be other shapes such as a circle or a regular polygon. The refractive index of the material of the microstructure 201 must be greater than that of the transparent substrate 200 . Through the setting of the size of the microstructure and the control of its refractive index, blue light (400-500nm) and high-energy light waves with shorter wavelengths can be effectively blocked without affecting the color gamut saturation of the display. The first protection film 100 and the second protection film 300 are light-transmitting materials. The material of the transparent substrate 200 is other transparent materials such as hexamethylene terephthalate or polycarbonate.

3 is a cross-sectional view of the second embodiment of the optical film of the present invention. The difference between this structure and the first embodiment is that the structure has two layers of microstructures, wherein the diameter of the second microstructure 202 can be different from the diameter of the microstructure 201, but It is required that the distance between two adjacent second microstructures 202 is twice the diameter of the second microstructures 202 , and the refractive index of the second microstructures 202 must be higher than that of the light-transmitting matrix 200 where they are located. Under the selection of the same material, the absorption effect of the multi-layer microstructure is better than that of the single-layer microstructure. The number of layers of the microstructure of the present invention is not limited to single-layer or two-layer, and can also be a multi-layer stacked structure.

The invention can not only effectively absorb the blue light, but also not affect the color gamut saturation of the display by arranging the microstructure in the optical film.

Claims (7)

1. a kind of optical thin film of anti-blue light, it is characterised in that：The optical thin film successively include the first protective film, residuite, Second protective film and release film are equipped at least one layer of micro-structure in the residuite, are equipped in every layer of micro-structure multiple micro- Structure, the micro-structure is in plurality of rows in residuite, and often row is equipped with multiple micro-structures, wherein certain a line micro-structure It is sequentially arranged between two micro-structure of adjacent lastrow, the micro-structure is the cylindrical-shaped structure in residuite.

2. a kind of optical thin film of anti-blue light according to claim 1, it is characterised in that：The material of the micro-structure Refractive index must be more than the refractive index of residuite.

3. a kind of optical thin film of anti-blue light according to claim 2, it is characterised in that：The micro-structure be it is round, Similar round or positive shape changeable, average diameter D, the average headway between two neighboring micro-structure are P, wherein P=2D.

4. a kind of optical thin film of anti-blue light according to claim 3, it is characterised in that：The diameter model of the micro-structure It encloses for 435nm to 500nm.

5. a kind of optical thin film of anti-blue light according to claim 4, it is characterised in that：The micro-structure it is a diameter of 435nm。

6. a kind of optical thin film of anti-blue light according to claim 1, it is characterised in that：First protective film and Two protective films are translucent material.

7. a kind of optical thin film of anti-blue light according to claim 1, it is characterised in that：The material of the residuite For terephthalic acids diester or makrolon.