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Compensation method of pixel circuit in organic light-emitting diode display panel and related devices

專利號
US10867549B2
公開日期
2020-12-15
申請人
BOE Technology Group Co., Ltd.(CN Beijing)
發(fā)明人
Minghua Xuan
IPC分類
G09G3/3208
技術(shù)領(lǐng)域
voltage,pixel,transistor,emitting,display,signal,in,circuit,frame,driver
地域: Beijing

摘要

The disclosure discloses a compensation method and device of an organic light-emitting diode display panel, and an organic light-emitting diode display device. A high-voltage signal received at a first electrode of a driver transistor in the pixel circuit is detected when a light-emitting element in the pixel circuit is emitting light in the current frame. Then the voltage difference between the high-voltage signals received by the driver transistor in the current frame and a preceding frame, i.e., compensation voltage, is determined according to the detected high-voltage signal received by the pixel circuit in the current frame, and the pre-stored high-voltage signal received by the pixel circuit in the preceding frame. When the compensation voltage lies out of a preset range, voltage compensation is performed on a reference voltage signal applied to the pixel circuit according to the compensation voltage.

說明書

An Organic Light-Emitting Diode (OLED) display is one of focuses in the existing research field of flat panel displays, and the OLED display has the advantages of a rapid response, high brightness, high contrast, low power consumption, easiness to be a flexible display, etc., over a Liquid Crystal Display (LCD), and is regarded as the predominant next generation of display. Unlike the LCD in which brightness is controlled using stable voltage, the OLED display is current-driven display, which is controlled using stable current to emit light. At present, it is common in the OLED display to write a data signal Vdata into a gate of a driver transistor in a pixel circuit, and to input a high-voltage signal VDD into a source of the driver transistor, so that the driver transistor generates current under the action of gate-source voltage to drive an OLED connected therewith to emit light. While two adjacent frames of images are varying, the driver transistor in the pixel circuit receives the constant high-voltage signal VDD under the ideal condition, but there is an IR drop in the OLED display, and the current flowing through the driver transistor is varying while the two adjacent frames of images are varying, so that the voltage of the high-voltage signal VDD received at the source of the driver transistor may vary between the two adjacent frames of images, and the voltage of the high-voltage signal VDD may vary more distinctly while there is a serious IR drop, thus resulting in crosstalk between the images, and deteriorating a display effect of the images, while a user is touching on the dynamic images.

SUMMARY

Embodiments of the disclosure provide a compensation method and device of an organic light-emitting diode display panel, and an organic light-emitting diode display device.

權(quán)利要求

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