Under-screen optical fingerprint identification device
A fingerprint identification and optical technology, applied in the field of fingerprint identification, can solve the problems of loss of display aperture ratio and increase of display resolution, and achieve the effect of high display aperture ratio and high display resolution.
Pending Publication Date: 2020-03-27
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
[0007] The purpose of this application is to provide an under-screen optical fingerprint recognition device to solve the problems of loss of display aperture ratio, display resolution and increase in device thickness in the existing under-screen optical fingerprint recognition technology
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[0046] In order to make the purpose, technical solution and effect of the present application more clear and definite, the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application, and the word "embodiment" used in the description of the present application is intended to be used as an example, illustration or illustration, and is not intended to limit the present application.
[0047]The present application provides an under-screen optical fingerprint identification device, which has an under-screen optical fingerprint identification function. The under-screen optical fingerprint recognition device includes a display panel and a fingerprint recognition unit array, wherein the fingerprint recognition unit array is arranged inside the display panel, and includes a plurality of fingerprint recognition ...
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Abstract
The invention provides an under-screen optical fingerprint identification device, which comprises a display panel and a fingerprint identification unit array, wherein the fingerprint identification unit array is arranged in the display panel and comprises a plurality of fingerprint identification units and a plurality of diffraction grating layers. The plurality of fingerprint identification units and the plurality of diffraction grating layers are formed in the same structure layer of the display panel. The plurality of diffraction grating layers are used for filtering interference light rays which are not required in fingerprint identification, and each diffraction grating layer is formed on one fingerprint identification unit in the plurality of fingerprint identification units and hasa one-to-one correspondence relationship. Since the diffraction grating has a thickness of only several microns and has a light angle filtering function, higher aperture opening ratio and resolutioncan be realized, and the requirement on the thickness of the whole equipment can be reduced.
Description
technical field [0001] The present application relates to a fingerprint identification technology, in particular to an under-screen optical fingerprint identification device. Background technique [0002] The current fingerprint identification technology is mainly divided into three types: ultrasonic fingerprint identification, capacitive fingerprint identification and optical fingerprint identification. These three fingerprint recognition technologies all utilize finger ridges and valleys to produce different feedback effects on the same detection signal for recognition. Capacitive fingerprint recognition is difficult to be placed under the screen to identify the user's fingerprint, so the method of plug-in is usually used to collect user fingerprint information, and the recognition module is additionally designed outside the screen, such as the Home button of the mobile phone or the back of the fuselage, the screen The proportion will decrease accordingly. Ultrasonic fin...
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IPC IPC(8): G06K9/00
CPCG06V40/1318G02F1/13338G02F1/133521G06V40/1365G02F1/133504G02F1/133528G02F1/163G02F2001/1635G02F2201/305
Inventor 张桂洋魏起
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD