Absorbing film and its application

A film and light-absorbing layer technology, applied in the direction of pressure-sensitive film/sheet, film/sheet-like adhesive, synthetic resin layered products, etc., can solve the problems of increasing light-shielding tape and ineffective screen contrast

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with these two methods, some light still passes through, so the effect of the blackout tape on increasing the contrast of the screen is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment relates to a light-absorbing film, including a first refractive index layer, a second refractive index layer, a third refractive index layer, a black light-absorbing layer and a back layer arranged in sequence from top to bottom, wherein the first refractive index layer, The refractive indices of the second refractive index layer and the third refractive index layer are 1.63, 1.55, and 1.43 respectively, and the refractive indices decrease sequentially; the light-absorbing film is obtained by biaxially stretching the raw materials of each layer through a co-extrusion process.

[0024] The thicknesses of the first refractive index layer, the second refractive index layer and the third refractive index layer are all 1 μm, the thickness of the black light absorbing layer is 8 μm, and the thickness of the back layer is 1 μm.

[0025] Both the first refractive index layer and the second refractive index layer include titanium dioxide particles of high refracti...

Embodiment 2

[0031] This embodiment relates to a light-absorbing film, including an upper refractive index layer, a lower refractive index layer, a black light-absorbing layer and a back layer arranged in sequence from top to bottom, wherein the refractive indices of the upper refractive index layer and the lower refractive index layer are respectively 1.6, 1.5; The light-absorbing film is obtained by biaxially stretching the raw materials of each layer through a co-extrusion process.

[0032] Both the upper and lower refractive index layers have a thickness of 3 μm, the black light-absorbing layer has a thickness of 5 μm, and the back layer has a thickness of 1 μm.

[0033] Both the upper refractive index layer and the lower refractive index layer include titanium dioxide particles of high refractive index material and silicon dioxide particles of low refractive index material. In parts by weight, titanium dioxide particles in the first refractive index layer are 30 parts, silicon dioxide ...

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Abstract

The invention provides a light absorption film and the application thereof, and belongs to the technical field of shading films. The light absorption film comprises a black light absorption layer anda plurality of functional layers stacked on the black light absorption layer; the refractive indexes of all the functional layers are decreased layer by layer from far to near according to the vertical distance between each of the functional layers and the black light absorption layer. In the light absorption film, the functional layers with the refractive indexes decreased sequentially are arranged on the black light absorption layer, rays are gradually diffused as the refractive indexes of all the functional layers are decreased, and the rays are basically absorbed when the rays reach the black light absorption layer as the transmitted rays are reduced, so that the purpose of shading is achieved.

Description

technical field [0001] The invention relates to a technology in the field of light-shielding adhesive tapes, in particular to a light-absorbing film and its application. Background technique [0002] At present, OLED technology has been widely used in mobile terminal equipment. In OLED screen design, glass or PI is often used as the substrate, and both glass and PI (Polyimide, polyimide) have the risk of light leakage, so a layer of light-shielding tape is added behind the screen to increase the contrast of the screen. [0003] The current shading tape is mostly made of black PET film, coated with pressure-sensitive adhesive and pasted behind the OLED screen, or transparent PET film, coated with black ink, coated with pressure-sensitive adhesive, and pasted behind the OLED screen. However, some light still passes through these two methods, so the effect of the shading tape on increasing the contrast of the screen is not obvious. Contents of the invention [0004] Aiming ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B3/08B32B27/36B32B7/06C09J7/29C09J7/38
CPCB32B3/08B32B7/06B32B9/00B32B9/04B32B9/045B32B27/36B32B2307/41C09J2400/10C09J2423/106C09J2467/006C09J2483/006
Inventor 李长顺
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