Fingerprint detection device and electronic equipment

Abstract

The invention provides a fingerprint detection device and electronic equipment. The fingerprint detection device is suitable for the electronic equipment with a display screen to realize under-screenfingerprint identification. The display screen sequentially comprises a transparent cover plate, a first transparent dielectric layer, an optical adhesive layer and a display layer from top to bottom.The fingerprint detection device comprises a fingerprint sensor chip, the fingerprint sensor chip is used for being arranged below the display screen, and the fingerprint sensor chip is used for receiving an optical signal sent by an external light source and returned by a finger above the display screen so as to detect fingerprint information of the finger; wherein the refractive index of the first transparent dielectric layer is respectively smaller than the refractive index of the optical adhesive layer and the refractive index of the transparent cover plate, so that an optical signal emitted by the external light source can be totally reflected in the transparent cover plate. The first transparent dielectric layer can improve the quality of the fingerprint image and the fingerprint recognition effect.

Description

technical field [0001] The embodiments of the present application relate to the field of fingerprint detection, and more specifically, to a fingerprint detection device and electronic equipment. Background technique [0002] At present, the fingerprint recognition under the screen is mainly used in the organic light-emitting diode (Organic Light-Emitting Diode, OLED) screen. The reflected light formed after the finger is reflected detects the fingerprint. However, since the light-emitting principle and specific structure of a liquid crystal display (Liquid Crystal Display, LCD) screen are different from those of an OLED screen, the fingerprint identification solution under the OLED screen is not suitable for the LCD screen. For the LCD screen, a supplementary light needs to be set separately, and the supplementary light is used to generate an optical signal for fingerprint identification. In addition, for the OLED screen, a supplementary light may also be provided, and cor...

AI Technical Summary

Problems solved by technology

[0004] However, since the refractive index of the glass cover is about 1.5, the refractive index of the optical glue is generally 1.47-1.5, which are very close to each other. When the surface of the glass cover and the air achieve total reflection conditions, the The interface between the lower surface and the optical adhesive fails to achieve the condition of total reflection of light

Correspondingly, even if you continue to adjust the light angle, it is difficult to achieve the total reflection condition

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