Pixel driving circuit and OLED display panel

Abstract

The invention discloses a pixel driving circuit and an OLED display panel. The pixel driving circuit comprises a control chip, a plurality of sub-pixel driving circuits, a plurality of detection switches electrically connected with the plurality of sub-pixel driving circuits in a one-to-one correspondence manner, a switch switching module and a detection circuit, wherein the control chip comprisesa detection signal output end electrically connected to the detection switch and used for inputting a detection control signal to the detection switch; the switch switching module comprises a plurality of switching signal output ends; the plurality of signal switching output ends are electrically connected to the detection switch and used for inputting a plurality of switching signals to the detection switch; the detection switch is used for controlling the on-off of the detection switch and the sub-pixel driving circuit corresponding to the detection switch under the control of the detectioncontrol signal and the plurality of switching signals; the detection circuit is electrically connected with each sub-pixel driving circuit through a detection line, and is used for detecting the threshold voltage of the sub-pixel driving circuit conducted with the detection switch. The technical effect of independently detecting the threshold voltage of the sub-pixel driving circuit is achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel driving circuit and an OLED display panel. Background technique [0002] Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. [0003] OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) two categories according to the driving method, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing two types. Among them, AMOLED has pixels arranged in an ...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a pixel driving circuit and an OLED display panel, aiming to solve the technical problems of excessive occupancy of detection chip pins and poor compatibility caused by detecting the threshold voltage of each sub-pixel in the prior art

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