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Display panel and pixel circuit thereof

A pixel circuit and capacitor technology, applied in static indicators, instruments, etc., can solve problems such as design difficulties, large total current flow of display panels, and inability to effectively maintain high external quantum efficiency of light-emitting diodes, so as to achieve stable output quality and reduce circuit The effect of the component

Active Publication Date: 2021-01-29
AU OPTRONICS CORP
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Problems solved by technology

As a result, the high external quantum efficiency of light-emitting diodes cannot be effectively maintained by means of amplitude modulation.
And through the pulse width modulation mechanism, there are also design difficulties in terms of high-resolution requirements.
In addition, under the premise of maintaining high external quantum efficiency, the total current passing through the display panel may be too large, which is difficult to implement

Method used

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  • Display panel and pixel circuit thereof
  • Display panel and pixel circuit thereof
  • Display panel and pixel circuit thereof

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Embodiment Construction

[0059] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0060] Please refer to Figure 1A , Figure 1A It is a schematic diagram of a pixel circuit according to an embodiment of the present invention. The pixel circuit 100 includes a drive transistor TD and a laser duration modulator 130 consisting of circuits 130-1, 130-2. The driving transistor TD has a control terminal for receiving the pulse width control signal PWC and the amplitude control signal PAM-G, and the pulse width control signal PWC is generated according to the pulse width modulation signal PWM-G. The transistor TD is driven and a driving signal DS is generated. In this embodiment, the light emitting element LED1 can be any form of light emitting diode.

[0061] On the other hand, the circuits 130-1, 130-2 in the laser duration modulator 130 are coupled in series with the driving transistor TD and the light emitting...

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Abstract

The invention discloses a display panel and a pixel circuit thereof. The pixel circuit comprises a driving transistor and a laser time length modulator. The driving transistor is provided with a control end to receive a pulse width control signal and an amplitude control signal, and the driving transistor generates a driving signal. In a first time interval, the laser time length modulator adjuststhe time length of a plurality of second time intervals for providing driving signals to a light-emitting element according to the laser time control signals.

Description

technical field [0001] The invention relates to a display panel and a pixel circuit. Background technique [0002] With the development of electronic technology, it becomes an important trend to improve high-quality display devices on electronic devices. Active light emitting diodes, after successful miniaturization, have become a mainstream design of flat display panels. [0003] In the conventional technical field, the brightness control of the light emitting diode can be based on pulse width modulation and amplitude modulation. Based on the requirements on the working efficiency of the light emitting diode, under the condition that the light emitting diode has a high external quantum efficiency (External Quantum Efficiency, EQE), the light emitting diode needs to work under a sufficiently high driving current. As a result, the high external quantum efficiency of the light-emitting diode cannot be effectively maintained by means of amplitude modulation. And through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2300/0804G09G2300/0852G09G2310/0262G09G3/3233G09G2310/067G09G3/2014G09G2310/0275G09G2310/08
Inventor 奚鹏博林振祺陈彦儒叶政男徐圣淯洪嘉泽刘恩池
Owner AU OPTRONICS CORP
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