Fingerprint identification unit, driving method for fingerprint identification unit, display substrate and display apparatus

Abstract

The invention discloses a fingerprint identification unit, a driving method for the fingerprint identification unit, a display substrate and a display apparatus. The fingerprint identification unit is arranged in the display substrate. The fingerprint identification unit comprises a switch unit, driving unit and a capacitor graph which are all connected to a node. The switch unit is connected with a gate line and a data line. The driving unit is connected with a signal input line and a signal output line. When a finger is not pressed, the switch unit is turned on under the control of a gate signal output by the gate line, and the data line charges the node through the turned-on switch unit. When the finger is pressed, the signal input line inputs a driving signal to the driving unit, and the driving unit outputs a reading signal through the signal output line under the control of a voltage of the node, wherein the reading signal is used for identifying a fingerprint generated by pressing the finger. According to the fingerprint identification unit, the driving method, the display substrate and the display apparatus, the fingerprint identification of the whole screen in the display apparatus is realized; and the same process as the internal structure of the display substrate is adopted to perform manufacturing, so that the cost is reduced.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a fingerprint identification unit and its driving method, a display substrate and a display device. Background technique [0002] In the late 1990s, the Hong Kong Polytechnic University and Tsinghua University pioneered the research field of fingerprint identification technology. Fingerprint identification has the advantages of high precision, fast speed, low price, and high user acceptance. With full attention, many universities and scientific research institutions at home and abroad have joined in this research field and achieved a series of results. [0003] At present, the application of fingerprint identification technology is more and more extensive. And with the development of display technology, more and more display devices are provided with a fingerprint identification function. In the prior art, a device with a fingerprint recognition function is usually arranged ou...

AI Technical Summary

Problems solved by technology

[0005] 1) Devices with fingerprint recognition function in the prior art can only realize partial fingerprint recognition, and cannot realize fingerprint recognition of the entire screen in the display device;

[0006] 2) A device with a fingerprint recognition function set separately requires a separate process for manufacturing, thereby increasing the cost

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