pixel circuit

A pixel circuit and compensation circuit technology, applied in the field of pixel circuits, can solve the problems of high power consumption of pixel circuits, on-current error, different terminal voltages, etc., and achieve the effect of reducing light-emitting time, reducing power consumption, and improving display quality.

Active Publication Date: 2022-03-01
AU OPTRONICS CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, when the pixel circuit operates in display screens with different grayscale levels (for example: low grayscale state, middle grayscale state or high grayscale state), when the conduction current of the driving transistor is in a high current state , and the light-emitting element is lit for a long time, it will make the overall power consumption of the pixel circuit too high
In addition, the system low voltage in the pixel circuit is also easily affected by the line resistance of the transmission path, resulting in different terminal voltages of each pixel, which in turn causes errors in the conduction current flowing through the light-emitting element in each pixel

Method used

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Embodiment Construction

[0039] As used throughout this disclosure, including the claims, the term "coupled (or connected)" may refer to any means of connection, direct or indirect. For example, if it is described that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or certain A connection means indirectly connected to the second device. In addition, wherever possible, elements / components / steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements / components / steps using the same symbols or using the same terms in different embodiments can refer to related descriptions.

[0040] figure 1 is a schematic diagram of a pixel circuit 100 according to an embodiment of the present invention. Please refer to figure 1 , The pixel circuit 100 includes a voltage adjus...

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Abstract

The invention provides a pixel circuit. The pixel circuit includes a first voltage adjustment circuit, a light emitting element, a compensation circuit and a second voltage adjustment circuit. The first voltage adjustment circuit has a first node and a second node, and adjusts voltage levels of the first node and the second node according to the first control signal, the third control signal and the light-emitting signal. The light emitting element has an anode terminal and a cathode terminal. The compensation circuit has a third node, and adjusts the voltage level of the first node according to the second control signal and the voltage level of the third node. The second voltage adjustment circuit has a fourth node, and adjusts the voltage levels of the third node and the fourth node according to the first control signal, the third control signal, the light emitting signal and the switch control signal.

Description

technical field [0001] The present invention relates to a display device, and in particular to a pixel circuit. Background technique [0002] With the advancement of electronic technology, display devices have become an indispensable tool in people's life. In order to provide a good man-machine interface, a high-quality display panel has become a necessary device in a display device. [0003] In the prior art, when the pixel circuit operates in display screens with different grayscale levels (for example: low grayscale state, middle grayscale state or high grayscale state), when the conduction current of the driving transistor is in a high current state , and when the light-emitting element is turned on for a long time, the overall power consumption of the pixel circuit will be too high. In addition, the system low voltage in the pixel circuit is also easily affected by the line resistance of the transmission path, resulting in different terminal voltages of each pixel, an...

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 林志隆邓名扬林佑升廖威胜吴佳恩李明贤彭佳添
Owner AU OPTRONICS CORP
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