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High-transmittance screen protecting film

A screen protective film and light transmittance technology, applied in the screen field, can solve the problems of incomplete reflection of light sources and insensitivity of fingerprint recognition, etc., and achieve the effects of reducing the speed of optical fingerprint recognition, reducing light interference, and small optical path difference

Pending Publication Date: 2018-10-23
SHAOXING XUYUAN NEW MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the protective films in the market now use PET film as the base film. After adding this ordinary protective film, because of the crystallization and birefringence characteristics of PET, the reflection of the light source is not complete, and the fingerprint recognition is not sensitive.

Method used

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Experimental program
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Embodiment 1

[0028] like Figure 1 to Figure 2 A high light transmittance screen protective film is shown, which is suitable for fingerprint operation equipment under the optical screen. It has a multi-layer structure, and it is characterized in that the screen protective film has an upper PC film layer 1 and a lower PC film layer 3; The upper PC film layer 1 and the lower PC film layer 3 are bonded with an OCA optical adhesive layer 2; the thickness h of the upper PC film layer 1, the OCA optical adhesive layer 2 and the lower PC film layer 3 after being combined is less than 185 μm (micron), the luminous flux φ is not less than 75lm (lumen); the upper surface of the upper PC film layer 1 is coated with a wear-resistant hardened layer 4, and the lower surface of the lower PC film layer 3 is coated with a highly air-permeable glass adhesive layer 5 .

[0029] It should be noted that, in the present embodiment, when the thickness h of the upper PC film layer 1, the OCA optical adhesive lay...

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Abstract

The invention relates to a high-transmittance screen protecting film applicable to optical-screen fingerprint operating equipment. The high-transmittance screen protecting film is in a multilayer structure and characterized by comprising an upper PC film layer and a lower PC film layer; the upper PC film layer and the lower PC film layer are adhered through an OCA optical adhesive layer; after combination of the upper PC film layer, the OCA optical adhesive layer and the lower PC film layer, the thickness h is smaller than 185micron, and the luminous flux phi is not smaller than 75lm (lumen);the upper surface of the upper PC film layer is coated with a wear-proof hardened layer, and the lower surface of the lower PC film layer is coated with a high-air-permeability glass adhesive layer. The high-transmittance screen protecting film has the advantage that fingerprint detection precision is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of screens, in particular to a high light transmittance screen protective film. Background technique [0002] Due to the popularity of the full-screen concept, no matter whether the traditional fingerprint unlocking method is used to unlock by front scraping or pressing, or using the rear unlocking method, it will affect the appearance of smart devices such as mobile phones. Fingerprint recognition requires a fingerprint collection window, which will inevitably affect the screen-to-body ratio, so the fingerprint technology under the screen came into being. [0003] At present, there are mainly ultrasonic and optical solutions for under-screen fingerprints. The optical solution refers to setting an optical sensor under the screen to identify the user's fingerprint pattern by emitting near-infrared light. The idea is similar to Apple's structured light solution. When the sensor is activated, the sensor will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29
CPCC09J7/29C09J2433/00C09J2469/006C09J2467/005
Inventor 程军刘永春
Owner SHAOXING XUYUAN NEW MATERIAL TECH
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