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Pixel circuit and display device

A technology of a pixel circuit and a compensation circuit, which is applied in the field of pixel circuits and display devices, can solve the problems of uneven brightness of the display screen and reduced display quality.

Active Publication Date: 2021-08-20
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the update frequency of the display module is one of the effective means to save power, but the brightness of the pixel circuit will gradually change due to leakage at a low update frequency, thus reducing the display quality
In addition, pixel circuits at different positions in the display module may also have different component characteristics due to process factors, making the brightness of the display screen uneven

Method used

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  • Pixel circuit and display device
  • Pixel circuit and display device
  • Pixel circuit and display device

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Embodiment Construction

[0058] The following is a detailed description of the embodiments in conjunction with the accompanying drawings to better understand the aspects of the present invention, but the provided embodiments are not intended to limit the scope of the disclosure, and the description of the structure and operation is not intended to The execution sequence is limited, and any device with equivalent functions produced by recombining components is within the scope of the present disclosure. In addition, according to industry standards and common practice, the drawings are only for the purpose of assisting explanation, and are not drawn according to the original scale. In fact, the dimensions of various features can be arbitrarily increased or decreased for the convenience of illustration. In the following description, the same components will be described with the same symbols for easy understanding.

[0059] figure 1 It is a schematic circuit diagram of a pixel circuit 100 according to a...

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PUM

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Abstract

The invention discloses a pixel circuit, which includes a light emitting unit, a driving transistor, a reset circuit, a compensation circuit and a data circuit. The light emitting unit is used for emitting light according to the driving current. The driving transistor is used for providing driving current to the light emitting unit. The reset circuit includes a first reset switch coupled to the first power terminal and a first node for providing a first voltage. The compensation circuit is used for detecting the critical voltage of the driving transistor, and the compensation circuit includes a first compensation switch coupled between the first node and the second power terminal. When the light-emitting unit emits light, the first reset switch and the first compensation switch are turned off, and the first reset switch, the first node and the first compensation switch form a leakage current between the first power supply terminal and the second power supply terminal path to balance the first voltage. The first power terminal and the second power terminal are used to provide different voltages.

Description

technical field [0001] The present invention relates to display technology, in particular to a pixel circuit suitable for low picture update frequency and a related display device. Background technique [0002] Modern people pay attention to personal health management, and often use wearable devices (eg, smart bracelets and watches) to measure various physiological indexes. Wearable devices usually perform functions such as data collection, storage and wireless communication without external power supply for a long time. Therefore, one of the design requirements of wearable devices is to reduce power consumption as much as possible when the total power is limited. Reducing the update frequency of the display module is one of the effective means to save power, but the brightness of the pixel circuit will gradually change due to leakage at low update frequency, thus degrading the display quality. In addition, pixel circuits at different positions in the display module may al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/3208
CPCG09G3/32G09G3/3208
Inventor 林志隆林佑升许志丞郑贸熏陈勇志
Owner AU OPTRONICS CORP