Backlight device for fingerprint identification and electronic equipment

Abstract

The invention discloses a backlight device for fingerprint identification under a screen and electronic equipment. The backlight device comprises a light source, a light guide plate arranged on one side of the light source, a reflector plate arranged below the light guide plate, an optical film arranged above the light guide plate, and a fingerprint recognition device arranged below the reflectorplate. An infrared transparent reflecting film is arranged on the reflector plate, the position of the infrared transparent reflecting film corresponds to the position of the fingerprint recognition device, and the infrared transparent reflecting film reflects visible light and transmits infrared light, so that the infrared light is collected by the fingerprint recognition device after transmitting the infrared transparent reflecting film.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a backlight device and electronic equipment used for fingerprint recognition in an LCD screen. Background technique [0002] Fingerprint sensing and matching is a reliable and widely used technology. A common method of fingerprint identification involves scanning a sample fingerprint or an image thereof and storing the image and / or unique characteristics of the fingerprint image, the characteristics of the sample fingerprint can be compared with information from reference fingerprints already present in a database to determine the correct identification of the user , for example for verification purposes. In particular, in-display fingerprint recognition is currently becoming more and more popular due to its ease of operation and versatility, and its suitability for compact portable electronic devices. [0003] The fingerprint recognition display device in the LCD screen ...

AI Technical Summary

Problems solved by technology

In addition, when the fingerprint identification unit 103 is placed above the backlight device, from the viewing angle of the display screen, the light transmittance of the display area where the fingerprint identification unit is placed below is compared to the light transmittance of other display areas where the fingerprint identification unit is not provided. It should be low, and the LED backlight at the bottom provides a uniform plane light source, the display area where the fingerprint identification unit is placed below is darker than other areas, and the display area of ​​the liquid crystal display device is unevenly bright and dark.

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