Pixel circuit and display device

Abstract

The embodiment of the invention provides a pixel circuit and a display device, which are used for improving the uniformity of the display region image brightness of the display device. The pixel circuit comprises a charging sub circuit, a driving sub circuit and a luminescence control sub circuit, and the driving sub circuit comprises a reference signal source, a driving transistor, a capacitor and a luminescent device, wherein the first end of the luminescence control sub circuit is connected with the output end of the reference signal source, the second end of the luminescence control sub circuit is connected with a source electrode of the driving transistor, the third end of the luminescence control sub circuit is connected with one end of the luminescent device, the fourth end of the luminescence control sub circuit is connected with a drain electrode of the driving transistor, one end of the capacitor is connected with a grid electrode of the driving transistor, the other end of the capacitor is connected with the output end of the reference signal source, the first end of the charging sub circuit is connected with a source electrode of the driving transistor, the second end of the charging sub circuit is connected with a drain electrode of the driving transistor, and the third end of the charging sub circuit is connected with a grid electrode of the driving transistor.

Description

technical field [0001] The present invention relates to the field of organic light emitting technology, in particular to a pixel circuit and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) displays have attracted much attention due to their advantages of low power consumption, high brightness, low cost, wide viewing angle, and fast response, and have been widely used in the field of organic light emitting technology. [0003] In OLED displays, there are the following unavoidable problems. First of all, each transistor used to realize image display on the backplane has structural inhomogeneity in the manufacturing process, as well as inhomogeneity in electrical performance and stability, resulting in the threshold voltage V of the transistor. th A drift has occurred. Second, the stability of the transistor will decrease when it is turned on for a long time. In addition, with the development of OLED size enlargement, the load on the signa...

AI Technical Summary

Problems solved by technology

When the same driving signal is applied to each pixel, the current flowing through each OLED in the backplane display area is not equal, resulting in uneven current on the backplane, resulting in uneven brightness of the image

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