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Blue light conversion diffusion barrier

A diffusion film and optical conversion technology, applied in the direction of optics, optical filters, optical components, etc., can solve the problems of increased toxins in the macular area, excessive blue light, low color rendering, etc., to avoid damage, reduce blue light radiation, Improves the effect of color purity

Inactive Publication Date: 2017-02-15
安徽省光学膜材料工程研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But from the white LED spectrum (such as Figure 4 As shown) it can be seen that the blue light is too strong and the red light is too weak, and the color rendering is low, which affects the display quality
Moreover, the intensity of the blue light emitted by white LEDs is relatively high, and the latest research shows that short-wave blue light has high energy and can penetrate the lens to reach the retina, which will increase the amount of toxins in the macular area of ​​the eye, seriously threatening the health of the human eye fundus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 The structure of the diffusion film shown is, from top to bottom, an optical diffusion coating 2 with a thickness of 10 μm, a transparent substrate 1 of cellulose triacetate film with a thickness of 10 μm, a single-layer optical conversion layer 4 with a thickness of 50 μm, and a thickness of 10 μm. 10 μm isolation layer 3 .

[0033] The optical diffusion coating 2 of this embodiment is composed of polyester resin and acrylic diffusion particles; the material used for the isolation layer 3 is acrylic resin; the optical conversion material of the optical conversion layer 4 is a rare earth fluorescent material: Eu 2+ Doped phosphor, the transparent resin is epoxy resin, the mass ratio of rare earth fluorescent material to transparent resin is 2:100, Eu 2+ The doped fluorescent powder is dispersed in the epoxy resin by ultrasound, and fixed on the surface of the transparent substrate 1 by coating. Eu 2+ The doped phosphor can be excited by blue light w...

Embodiment 2

[0035] Such as figure 2 The structure of the diffusion film shown is, from top to bottom, an optical diffusion coating 2 with a thickness of 10 μm, a single-layer optical conversion layer 4 with a thickness of 1 μm, and a PET (polyethylene terephthalate) with a thickness of 50 μm Transparent substrate 1, isolation layer 3 with a thickness of 10 μm.

[0036] The optical diffusion coating 2 in this implementation case is composed of polyester resin and acrylic diffusion particles; the material used for the isolation layer 3 is acrylic resin; the optical conversion material of the optical conversion layer 4 is a rare earth fluorescent material: Eu 2+ A mixed material doped with fluorescent powder and xanthene derivatives, the transparent resin is acrylic resin, the mass ratio of the light conversion material to the transparent resin is 1.5:100, and the light conversion material is dispersed in the acrylic resin by high-speed shearing. The cloth method is fixed on the surface of...

Embodiment 3

[0038] Such as image 3 The structure of the diffusion film shown is, from top to bottom, an optical diffusion coating 2 with a thickness of 10 μm, a single-layer optical conversion layer 4 with a thickness of 100 nm, and a transparent substrate 1 of polycarbonate film with a thickness of 100 μm and a thickness of 100 nm. A single-layer optical conversion layer 4 and an isolation layer 3 with a thickness of 10 μm.

[0039] The optical diffusion coating 2 of this embodiment is composed of polyester resin and acrylic diffusion particles; the material used for the isolation layer 3 is acrylic resin; the optical conversion material of the optical conversion layer 4 located above the transparent substrate 1 is an organic small molecule fluorescent dye oxygen Xanthene derivatives, the transparent resin is polyester resin, the mass ratio of xanthene derivatives to polyester resin is 0.01:100, and the xanthene derivatives are dissolved in isopropanol solvent and mixed with polyester r...

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Abstract

The present invention discloses a blue light conversion diffusion barrier. The diffusion barrier comprises transparent base materials (1) and a plurality of light conversion layers (4) fixed at one surface at one side or two surfaces at two sides of the transparent base materials (1), the light conversion layers (4) are configured to convert the blue light having the wave length of 400-480nm to green-yellow light or orange red light, a light diffusion coating (2) is arranged at the uppermost layer of the transparent base materials (1), and an isolation layer (3) is arranged at the lowest layer of the transparent base materials (1). The blue light conversion diffusion barrier can convert high-energy blue light to orange red light or green-yellow light so as to absorb the high-energy blue light of white LED point light source in the backlight of a liquid crystal display screen, reduce the blue light radiation and avoid damaging of human eyes; and moreover, the blue light conversion diffusion barrier has the function of improving the purities of the red, green and blue light colors and the color rendering index, the contrast and the brightness of the display device.

Description

technical field [0001] The invention relates to an optical thin film material, in particular to a blue light conversion diffusion film mainly used for display screens of mobile phones, computers, digital cameras and the like. Background technique [0002] White light LED has the advantages of high luminous efficiency, long life, energy saving and environmental protection, and has gradually become the light source commonly used in backlight modules of liquid crystal display devices. White LEDs are composed of blue gallium nitride LED chips and phosphors that can be effectively excited to emit yellow light. When the LED chip emits blue light (440-470nm), part of the blue light will be efficiently converted by the phosphor into yellow light with a wider spectrum at the center of the spectrum at about 580nm. The yellow light mixes with the blue light of the LED itself and looks close to white light. But from the white LED spectrum (such as Figure 4 As shown), it can be seen t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02F1/13357
CPCG02B5/208G02F1/133603G02F1/133606G02F1/133607G02F1/133614
Inventor 施克炜谷至华汪敏陈晓东刘洪乐
Owner 安徽省光学膜材料工程研究院有限公司
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