Array substrate, related current detection method, display panel and display device

Abstract

The invention discloses an array substrate, a related current detection method, a display panel and a display device. A part, exposed by an open hole, in a first power line serves as an induction electrode; when touch control or fingerprint identification is carried out, a coupling capacitor is formed between the finger and the induction electrode; the size of the coupling capacitor is changed along with the distance between the finger and the sensing electrode. A pixel circuit electrically connected with an induction electrode is set to comprise a first switch transistor; The first switchingtransistor is configured to be in an induction phase. Under the control of a signal of the first control signal end, a signal of the induction electrode is transmitted to the driving transistor, the driving transistor outputs current to the current detection end, the current is related to the size of the coupling capacitor, and therefore the functions of touch control and fingerprint recognition can be achieved by detecting the current change of the current detection end. In addition, the scheme of the invention is simple, no complex Mask process needs to be added, the cost is low, and the current during touch control or fingerprint identification is measured.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an array substrate, a related current detection method, a display panel and a display device. Background technique [0002] At present, users have higher and higher requirements for mobile terminal equipment. Lighter, thinner, brighter and more energy-saving are still the requirements of most users. The display function can be realized and become the lighter and thinner preferred display. At the same time, the demand for displays in the current market is no longer limited to flat surfaces, heterosexuality, curved surfaces, transparent displays, etc., all of which make OLED the most widely used display technology in the future. [0003] As users have higher and higher requirements for terminal equipment, the integration of various functions is also an inevitable demand for display terminals. Among them, the fingerprint recognition function has been more popular in recent...

AI Technical Summary

Problems solved by technology

[0003] As users have higher and higher requirements for terminal equipment, the integration of various functions is also an inevitable demand for display terminals. Among them, the fingerprint recognition function has been more popular in recent years. At present, fingerprint recognition is mostly used due to its complexity. In the form of plug-ins, but in order to display the thin and light requirements of the terminal, the integration of fingerprint recognition is also the object of research by the product development team

But at present, there are great difficulties in integrating capacitive fingerprint recognition into the display.

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