Scanning type fingerprint identification and touch control integrated screen

Abstract

The invention discloses a scanning type fingerprint identification and touch control integrated screen comprising a backlight light source, an optical waveguide, rasters, a LCD module, array sensors, an initialization detection area, a fingerprint detection area, and a lens system; the optical waveguide is arranged above the backlight light source; the raster is respectively arranged on bottom surfaces of two adjacent sides of the optical waveguide; the array sensor is respectively arranged on another two adjacent sides of the optical waveguide; the LCD module is arranged between the backlight light source and the optical waveguide; one side edge area of the optical waveguide is the fingerprint initialization detection area; the fingerprint detection area is located on a visual light emitting surface of the optical waveguide; the lens system is arranged between the array sensors and the rasters. The scanning type fingerprint identification and touch control integrated screen is safe, ultra thin, high in imaging quality, and low in cost.

Description

technical field [0001] The invention relates to an integrated screen, in particular to a scanning fingerprint identification and touch integrated screen. Background technique [0002] According to different technical principles, touch screens can be classified into: resistive touch screen, capacitive touch screen, surface acoustic wave touch screen and infrared touch screen. Resistive touch screens have the advantages of not being afraid of pollution and low cost, but they are not wear-resistant, have low light transmittance and slow response speed; surface acoustic wave touch screens are poor in anti-fouling, the transmitting transducer is fragile, and have a short service life; capacitive touch screens are resistant to electromagnetic interference Poor, requires conductors for touch control, limited use environment, and high environmental requirements for temperature, humidity and grounding. The infrared touch screen has no effect on human eyes because of the infrared bac...

AI Technical Summary

Problems solved by technology

But in the same way, the cost of the infrared emission backlight source is high, and because the infrared backlight source is generally a point backlight source, it needs a certain thickness and length to allow the light to be evenly distributed, which cannot meet the requirements of thinness and small size and portability. Satisfied to detect the user's fingerprint while generating touch control

The Chinese patent published as CN104751121A discloses an optical waveguide fingerprint recognition system based on a grating structure, but it allows the separation of detection area units. Touch points are missed; and the detection area units are not allowed to overlap, which will cause the total reflection angle to be very large, making it more difficult for fingerprints to destroy the total reflection, reducing the contrast of the image, and thus causing CCD (Charge-coupled Device, Chinese full name: charge-coupled element) area increases, making the cost of the entire device higher

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