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Fingerprint identification module

A fingerprint recognition module and backlight module technology, applied in character and pattern recognition, calculation models, instruments, etc., can solve problems such as low response, increase backlight brightness, affect sensor sensitivity, etc., achieve clear fingerprint images, improve The effect of sensitivity

Pending Publication Date: 2022-01-11
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the use of blue light can avoid the interference of external strong light, the response of the used amorphous silicon flat panel detector to blue light is low, which greatly affects the sensitivity of the sensor. It is necessary to increase the brightness of the backlight and increase the overall performance of the device. consumption

Method used

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Embodiment Construction

[0041] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0042] The embodiment of the present invention aims at the low response of the amorphous silicon flat-panel detector to blue light in the prior art, which greatly affects the sensitivity of the sensor, and needs to increase the brightness of the backlight, thereby increasing the overall power consumption of the device, and provides a fingerprint Identification module, the fingerprint identification module includes:

[0043] A backlight module, the backlight module includes a backlight, and the backlight emits backlight;

[0044] A flat-panel detector located on the light-emitting side of the backlight module, the flat-panel detector includes a quantum dot film layer;

[0045] A filter layer located on the side of the flat panel detect...

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Abstract

The embodiment of the invention provides a fingerprint identification module. The fingerprint identification module comprises a backlight module; a flat panel detector which is located on the light emitting side of the backlight module and comprises a quantum dot film layer; a filter layer which is located on the side, away from the backlight module, of the flat panel detector, backlight emitted by the backlight source reaches the filter layer through the flat panel detector, and blue light is generated after the backlight is filtered by the filter layer; a collimation film layer which is located on the side, away from the backlight module, of the filtering layer, and blue light reaches the surface of a finger after being collimated by the collimation film layer, wherein the quantum dot film layer receives blue light which is reflected by the surface of a finger, penetrates through the collimation film layer and the filtering layer and carries fingerprint information, and converts the blue light into green light carrying the fingerprint information; the flat panel detector converts the green light carrying the fingerprint information into an electric signal; the fingerprint identification module acquires a fingerprint image according to the electric signal. The fingerprint identification module provided by the embodiment of the invention is high in sensitivity, so that a clear fingerprint image can be obtained.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification module. Background technique [0002] As a biometric feature, fingerprints have been widely used in security, smart door locks, smart phones and other fields. Among them, fingerprint image acquisition mainly utilizes CMOS / CCD camera. Fingerprint identification modules generally contain bulky optical systems, and at the same time, to obtain a larger acquisition area, the thickness of the module will also increase. In the related art, the interference of external strong light is solved by setting the filter layer and the wavelength of the backlight. In practical applications, considering the composition of ambient light and the transmittance of fingers to light of different wavelengths, the general backlight adopts white backlight, and the filter layer is blue ink. absorb. The content of blue light in ambient light is low, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V40/13G06N10/40
CPCG06N10/00
Inventor 周琳李成丰亚洁
Owner BOE TECH GRP CO LTD
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