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Brightness enhancement film

A technology of brightness enhancement film and polymer layer, applied in the field of communication, can solve problems such as non-directional scattering and total reflection, and achieve the effect of accurate identification and verification

Pending Publication Date: 2019-07-30
SHENZHEN LONGLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the platform structure adjusts the incident or outgoing optical signal to parallel light that is basically perpendicular to the plane of the brightness enhancement film. The setting of the platform structure solves the problems of total reflection and non-directional scattering of light in the lens structure of the traditional brightness enhancement film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First, through Figure 4 , Figure 5 , Figure 7 , the brightness enhancing film of Example 1 of the present invention will be described. According to Embodiment 1 of the present invention applied to a backlight module, a conventional backlight module includes a light source 221 and a light guide plate 220 disposed on one side of the light source 221, a reflective sheet 210 disposed below the light guide plate 220, and disposed on the upper side of the light guide plate 220 The diffusion sheet 230 is the brightness enhancement film 240 arranged on the upper side of the diffusion sheet; wherein, the surface of the substrate 2401 of the brightness enhancement film 240 is provided with a plurality of lens structures 2402 and a plurality of platform structures 2403; the platform structure includes a platform part 24031; the platform structure It is arranged between the plurality of lens structures 2402 so that external light is substantially vertically incident and substa...

Embodiment 2

[0043] Please refer to Figure 9 , is a cross-sectional structure diagram of the first polymer layer 310 and the second polymer layer 320 of the brightness enhancement film of the second embodiment of the present invention. In the following, only the differences between Embodiment 2 and Embodiment 1 will be described, and the similarities will not be repeated here. The second polymer layer 320 of the brightness enhancement film is only provided with a lens structure 2402, and no platform structure is provided. 2403. At this time, the light can be condensed and diverged by the lens structure 2402 to uniformize the light respectively emitted by the first polymer layer 310 and avoid the situation of uneven light output (Mura).

Embodiment 3

[0045] Please refer to Figure 10 , is a cross-sectional structure diagram of the first polymer layer 310 and the second polymer layer 320 of the brightness enhancement film according to the third embodiment of the present invention. In the following, only the differences between Embodiment 3 and Embodiment 1 will be described, and the similarities will not be repeated here. The upper surface of the first polymer layer 310 of the brightness enhancement film is provided with a platform structure 2403A with a trapezoidal cross-section. A platform structure 2403B is disposed on the lower surface of the first polymer layer 310 opposite to the platform structure 2403A. Here, the platform structure 2403B is made of the same material as the first polymer layer 310 , and is disposed in the gap of the lens structure 2402 array.

[0046] The platform structure 2403C on the second polymer layer 320 is made of the same material as the second polymer layer 320 , and is disposed in the gap...

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Abstract

The invention discloses a brightness enhancement film for fingerprint identification inside an LCD screen. The surface of the brightness enhancement film is provided with multiple lens structures andmultiple platform structures, wherein the platform structures comprise platform parts and are arranged between the multiple lens structures and / or on the multiple lens structures, so as to enable external light to generally vertically penetrate the plane of the brightness enhancement film. Through adoption of the brightness enhancement film, a fingerprint identification signal can penetrate the LCD module effectively and can be collected accurately, and the fingerprint identification function in the screen of the LCD display device is realized.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a brightness enhancement film and an LCD module used for fingerprint recognition in an LCD screen. Background technique [0002] Fingerprint sensing and matching is a reliable and widely used technology. A common method of fingerprint identification involves scanning a sample fingerprint or an image thereof and storing the image and / or unique characteristics of the fingerprint image, the characteristics of the sample fingerprint can be compared with information from reference fingerprints already present in a database to determine the correct identification of the user , for example for verification purposes. In particular, in-display fingerprint recognition is currently becoming more and more popular due to its ease of operation and versatility, and its suitability for compact portable electronic devices. [0003] Currently, in-screen fingerprint recognition display dev...

Claims

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Application Information

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IPC IPC(8): G02B5/04G02F1/13357
CPCG02B5/045G02F1/133606G02F1/133607
Inventor 张小齐彭益庄世强
Owner SHENZHEN LONGLI TECH CO LTD
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