Fingerprint detection device and electronic equipment

Abstract

The invention provides a fingerprint detection device which can improve the performance of fingerprint detection. The device is arranged below a display screen of the electronic equipment to be used for fingerprint detection under the screen, and comprises a color filter layer which comprises a plurality of groups of color filter units, wherein each group of color filter units comprises a red filter unit, and the red filter units are used for transmitting red light signals returned by fingers; an infrared filtering layer which is used for blocking red light and infrared light with the cut-offwavelength larger than or equal to the cut-off wavelength of the infrared filtering layer, wherein an open hole is formed in the position, corresponding to the red filtering unit, in the infrared filtering layer so that the red light signal penetrating through the red filtering unit can not be blocked; and an optical fingerprint sensor which is used for detecting an optical signal returned by thefinger and penetrating through the color filter layer and the infrared filter layer, wherein the optical signal is used for acquiring a fingerprint image of the finger, and the red light signal in theoptical signal is used for determining the authenticity of the finger and / or used for strong light detection.

Description

technical field [0001] The embodiment of the present application relates to the field of biometric identification, and more specifically, relates to a fingerprint detection device and electronic equipment. Background technique [0002] When performing optical fingerprint detection, the light source illuminates the finger above the display screen, and the optical fingerprint sensor collects the light signal reflected or scattered by the finger to obtain the fingerprint information of the finger. In order to avoid the interference caused by red light and infrared light to fingerprint detection, an infrared cut-off (Infrared Radiation Cut, IRC) filter layer needs to be set. In a strong light environment, the sensing unit of the optical fingerprint sensor is easily saturated, which affects the performance of fingerprint detection. At this time, the impact on fingerprint detection in a strong light environment can be solved by reducing the cut-off wavelength of IRC. However, whe...

AI Technical Summary

Problems solved by technology

However, when the color filter layer is used to realize fingerprint anti-counterfeiting, the reduction of the cut-off frequency of the IRC filter layer directly leads to the reduction of the red light component, which in turn affects the identification of the authenticity of the finger by the optical fingerprint sensor, and is not conducive to strong light detection, thereby affecting fingerprints. detection performance

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