Micro-display pixel device, micro-display device and compensation method

Abstract

The present invention relates to a micro-display pixel device comprising: a light emitting device; a display driving module coupled to the light emitting device, configured to receive a scan signal and a data signal and to drive the light emitting device, the display driving module including at least a driving transistor coupled to the light emitting device; and a feedback compensation module coupled to the light emitting device and the display driving module, configured to perform feedback compensation on the driving module through capacitive coupling, and including at least a first storage capacitor coupled to a control electrode of the driving transistor. The invention further relates to a micro-display device and a compensation method of the micro-display pixel device.

Description

technical field [0001] The invention relates to a circuit, in particular to a micro display pixel circuit. Background technique [0002] Due to its small size and portability, microdisplay devices have become a hot issue in the field of display research. However, due to the small display area of ​​the micro-display device, which is very close to the user's eyes, in order to achieve the same resolution as the large-screen display, the size of a single pixel in the micro-display device is very small, only a few hundred microns. Therefore, the storage capacitance in a single pixel circuit of the micro display device is also very small, generally only at the fF level. Due to the existence of the leakage current of the switch transistor in the pixel circuit, the voltage of the storage capacitor will change too much within a frame time. Since the light-emitting device emits light when the voltage of the storage capacitor changes, if the voltage on the storage capacitor changes to...

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Problems solved by technology

Due to the existence of the leakage current of the switching transistor in the pixel circuit, the voltage of the storage capacitor will change too much within a frame time. Since the light-emitting device emits light when the voltage of the storage capacitor changes, if the voltage on the storage capacitor changes too It will affect the normal display of the display panel

The traditional and commonly used method is to extract the voltage across the light-emitting device such as OLED, and compensate the change of charge in the storage capacitor through feedback, but this will make the current generated by the driving transistor of the pixel circuit be affected by the aging of the light-emitting device such as OLED to a certain extent.

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