Pixel circuit, drive method and display device

Abstract

The invention discloses a pixel circuit, a drive method and a display device. The pixel circuit comprises a high level input end, a low level input end, a reset module, a first charge control module, a detection drive module and a storage capacitor; the reset module is used for endowing the storage capacitor with initial voltage at a reset phase; the first charge control module is connected with a data line and a first end of the storage capacitor and is used for writing data voltage into the storage capacitor at a charge phase; a first input end of the detection drive module is connected with a second end of the storage capacitor; a second input end of the detection drive module is connected with the high level input end; the output end of the detection drive module is connected with a lighting device; when electric quantity of the storage capacitor is not fully charged, at a display phase, the second input end of the detection drive module is conducted with the lighting device; when the electric quantity of the storage capacitor is fully charged, at the display phase, the first input end of the detection drive module is conducted with the lighting device. The pixel circuit, the drive method and the display device can delay attenuation of current flowing through the lighting device.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method, and a display device. Background technique [0002] When the existing organic light emitting diode (OLED) pixel circuit drives the OLED to emit light, the luminance curve drops seriously at the initial stage. Such as figure 1 As shown, the T95 time of the OLED brightness (that is, the time taken for the brightness to drop from the peak value to 95% of the peak value) is relatively short, within half an hour. also, Figure 2a-Figure 2b respectively figure 1 The schematic diagram of the slope of the two curves in the graph changes with time. It can be seen that: in the time period of 0-10h, the slope is negative, indicating that the brightness decays very fast; In the 90-140h time period, the slope fluctuates around 0, indicating that the noise interference is more obvious. [0003] The main reason for the sharp drop in the OLED brig...

AI Technical Summary

Problems solved by technology

[0003] The main reason for the sharp decline of the OLED brightness curve at the initial stage is that the storage capacitor in the circuit is not fully charged, resulting in unstable output current of the drive tube, fast attenuation and obvious noise interference.

[0004] In addition, after the luminous brightness of the OLED is stabilized, various adjustments and polarizers must be carried out in the follow-up. These processes will also affect the luminous efficiency and further reduce the brightness of the final product.

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