Optical detection device and electronic equipment

Abstract

The invention discloses an optical detection device. The optical detection device comprises a display device, a transmitting module and a detection module; the display device comprises a protective layer, and the protective layer comprises a first surface and a second surface which are oppositely arranged. The display module is located below the protective layer and can be used for displaying information. The emitting module is located below the protective layer and used for emitting detection light beams, and the detection light beams can enter the protective layer through the display moduleand are at least transmitted in the protective layer in a total reflection mode. The detection module is provided with a view field area on the first surface of the protective layer; when the emissionmodule emits a detection light beam to detect an external object in contact with the view field area, diffuse reflection happens to the detection light beams at the position where an external objectmakes contact with the view field area, at least part of the detection light beams subjected to diffuse reflection penetrate out of the protection layer and are received by the detection module through at least part of the display module, and the detection module converts the received detection light beams into corresponding electric signals so as to obtain fingerprint information. The invention further discloses electronic equipment.

Description

technical field [0001] The present application relates to the field of optoelectronic technology, and in particular, to an optical detection device and electronic equipment that can realize under-screen biometric detection. Background technique [0002] With the advancement of technology and the improvement of people's living standards, users require more functions and stylish appearance for electronic devices such as mobile phones, tablet computers, and cameras. At present, the development trend of electronic devices such as mobile phones is to have a high screen ratio and to have functions such as fingerprint detection. In order to achieve a full-screen or near-full-screen effect and make electronic devices have a high screen-to-body ratio, under-screen fingerprint detection technology came into being. In the prior art, some products use an OLED display screen, collect the visible light reflected by the finger under the OLED display screen, and use the fingerprint feature...

AI Technical Summary

Problems solved by technology

However, for non-self-illuminating displays such as liquid crystal displays (LCDs), due to the different screen structures and display principles, liquid crystal displays usually need to use visible light provided by a backlight unit to achieve display, and visible light cannot penetrate the backlight unit well. The method of visible light reflection cannot realize the detection of fingerprints or other biological characteristics under the LCD screen very well.

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