Area fingerprint sensor

Abstract

The invention provides an area array fingerprint sensor. The area array fingerprint sensor comprises a substrate, a pixel unit, a drive wire, a drive patch cord and a signal wire, wherein the pixel unit is arranged on the substrate like an array; the pixel unit comprises a switch device and a photoelectric device which is connected with the switch device; the photoelectric device is used for converting the optical signals with fingerprint information into electric signals; the drive wire is located on the substrate in the line direction and correspondingly connected with the switch device of the pixel unit; the drive patch cord is located on the substrate in the row direction and correspondingly connected with the drive wire and is used for transmitting an ON signal which is capable of conducting the switch device to the drive wire; the signal wire is located on the substrate along the line direction and correspondingly connected with the photoelectric device and is used for transmitting the electric signal formed by the photoelectric device. According to the area array fingerprint sensor, the peripheral mechanism size can be reduced; and moreover, the area array fingerprint sensor can be finished without changing the existing production line, so that the production cost is not increased.

Description

technical field [0001] The invention relates to the technical field of fingerprint sensing, in particular to an area array fingerprint sensor. Background technique [0002] The area fingerprint sensor is a planar imaging device, which is composed of a pixel unit array, driving lines, signal readout lines, etc. [0003] When performing fingerprint sensing, the optical signal with image information is directly projected to each pixel unit on the imaging surface of the sensor, and is absorbed by the pixel unit of the sensor to form an image. Since there is no lens or optical fiber to focus the light, it is the same size and no scaling, so there will be better imaging quality, and the imaging equipment will be thinner and lighter. [0004] refer to figure 1 , shows a schematic diagram of an area-array fingerprint sensor in the prior art. Visible light penetrating from the back is irradiated to an object close to the imaging surface of the area-array fingerprint sensor 1. The v...

AI Technical Summary

Problems solved by technology

[0010] However, whether the driver chip 21 is figure 2 The COF module method of the chip on the film shown is still as follows image 3 The COG binding method shown is still as Figure 4 In the ASG, LTPSG, or OSG circuit mode, the area outside the pixel unit array of the area fingerprint sensor 1 is relatively large

As the requirements for the size of the peripheral mechanism increase, the size of the area outside the pixel area of ​​the area array fingerprint sensor 1 is also getting smaller and smaller. It is difficult for the area fingerprint sensor of the prior art to meet the requirement of a smaller size of the peripheral mechanism

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