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Pixel circuit

A technology of pixel circuits and driving circuits, applied in the field of pixel circuits, can solve problems such as insufficient use of pixel circuits.

Active Publication Date: 2021-04-16
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The organic light emitting diode itself is a current-driven element, and the brightness (also known as the gray scale value) of the organic light emitting diode is controlled by giving different data voltages to the pixel circuit to generate different driving currents; however, the display requires multiple different gray scale values. When the number of gray scales is greater than the number of data voltages that the data drive circuit can provide, the pixel circuit with one data voltage corresponding to one gray scale value is not enough

Method used

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Embodiment Construction

[0061] The advantages, features and technical methods achieved by the present invention will be described in more detail with reference to exemplary embodiments and accompanying drawings to make it easier to understand, and the present invention can be implemented in different forms, so it should not be understood to be limited to what is stated here On the contrary, for those skilled in the art, the provided embodiments will make this description more thorough, comprehensive and completely convey the scope of the present invention, and the present invention will only be the appended rights defined by the requirements.

[0062] It should be understood that although the terms "first", "second" and the like may be used in the present invention to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or Parts should not be limited by these terms. These terms are only used to distinguish one element, component, reg...

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Abstract

A pixel circuit includes a driving circuit, a first switch, a second switch, a third switch, a control circuit, and a light-emitting unit. The first switch is connected to the drive circuit and is controlled by the first start signal, The first switch outputs the first current according to the first duty cycle of the first start signal. The second switch is connected to the driving circuit and is controlled by the second start signal, The second switch outputs the second current according to the second duty cycle of the second start signal, The second work cycle is different from the first work cycle. The third switch is connected to the second switch and receives the second current. The control circuit is connected to the third switch and sends a control signal to the third switch, The third switch outputs a third current according to the control signal and the second current. The light emitting unit is connected to the third switch and the first switch, The light emitting unit emits light according to the first current or the third current.

Description

technical field [0001] The present invention relates to a pixel circuit that uses a first switch, a second switch and a third switch to adjust the light-emitting time of a driving current flowing through a light-emitting unit. Background technique [0002] Organic light-emitting diodes have the advantages of self-illumination, high brightness, high contrast, and simple manufacturing process, and have been gradually applied to various types of displays. The organic light emitting diode itself is a current-driven element, and the brightness (also known as the gray scale value) of the organic light emitting diode is controlled by giving different data voltages to the pixel circuit to generate different driving currents; however, the display requires multiple different gray scale values. When the number of gray scales is greater than the number of data voltages that can be provided by the data driving circuit, the pixel circuit with one data voltage corresponding to one gray sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/325
Inventor 赖柏君施璇萧名骐张一明陈勇志
Owner AU OPTRONICS CORP
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