Self-luminous display device and pixel internal and external compensation compatible circuit

Abstract

The invention provides a pixel internal and external compensation compatible circuit. The pixel internal and external compensation compatible circuit is connected with a luminous element; the luminouselement is located between a first power supply and a second power supply, the compatible circuit is connected with a driving chip through a signal multiplexing line, and the driving chip is providedwith a switch, and a digital-to-analog converter and an analog-to-digital converter which can be connected with the switch; the compatible circuit further comprises a first driving TFT located between the first power supply and the luminous element, a first switching TFT located between the first driving TFT and the signal multiplexing line, a second switching TFT located between the first driving TFT and the first power supply, a storage capacitor located between the first driving TFT and the second power supply, a third switching TFT located between the first driving TFT and the storage capacitor and a fourth switching TFT located between the first driving TFT and the luminous unit. The compatible circuit has the capabilities of internal compensation and external compensation, and the flexibility and compensation range of pixel compensation are improved.

Description

technical field [0001] The present invention relates to the technical field of display panels, in particular to a self-luminous display device and a pixel internal and external compensation compatible circuit. Background technique [0002] In recent years, display devices have been developing in the direction of thinner, lighter and more flexible. Self-luminous displays include organic electroluminescent OLEDs, quantum dot electroluminescent QLEDs, and micro-electroluminescent Micro-LEDs. Self-luminous displays are in the These aspects have natural advantages. [0003] For the light-emitting element with self-luminous display, its luminous brightness has a positive correlation with the applied voltage and current. The relationship between luminous brightness and voltage will be affected by factors such as ambient temperature and usage time. Therefore, it is difficult to control the brightness uniformity and stability of the self-luminous display by adopting the method of v...

AI Technical Summary

Problems solved by technology

However, the current control mode has the following two problems: (1) the control current is weak current, which has high requirements for the design of the driver IC; (2) due to the influence of parasitic capacitance, the pixel compensation circuit of the current control mode requires a relatively long setting time to achieve compensation

In order to achieve better coupling and voltage retention effects, the size of the two capacitors needs to be designed to be sufficient. However, in a design with a higher pixel density, the capacitor will occupy a larger layout space, which limits the increase in pixel density.

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