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Pixel circuit

A pixel circuit and capacitor technology, which is applied in the field of display devices, can solve problems affecting the quality of the display screen, uneven brightness display, etc., and achieve the effect of improving quality and reducing process differences

Inactive Publication Date: 2020-01-14
CHUNGHWA PICTURE TUBES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, since the display picture presented by the display panel is easily affected by the threshold voltage (Threshold Voltage) of the driving transistor in the pixel circuit (for example, the driving transistor is subject to long-term operation or process differences), and Causes light-emitting elements (such as organic light-emitting diodes) to easily display uneven brightness, which in turn affects the quality of the display screen

Method used

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Embodiment Construction

[0031] figure 1 is a circuit diagram of a pixel circuit according to an embodiment of the present invention. Please refer to figure 1 , in this embodiment, the pixel circuit 100 includes first to third transistors M1 - M3 , a capacitor C1 , a voltage setting circuit 110 and a light emitting element LED. The voltage setting circuit 110 is coupled between the first terminal of the capacitor C1 and the node NB, and the voltage setting circuit 110 can receive the data signal SD, the second scan signal S2 and the third scan signal S3. Wherein, the voltage setting circuit 110 may include a fourth transistor M4 and a fifth transistor M5. It should be noted that the first to fifth transistors M1 - M5 in this embodiment are N-type transistors as an example, but this embodiment of the present invention is not limited thereto.

[0032] In this embodiment, the capacitor C1 is coupled between the voltage setting circuit 110 and the node NC, and the capacitor C1 is used for storing the d...

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PUM

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Abstract

The invention provides a pixel circuit. In the pixel circuit, a first end of a first transistor is coupled to a first node, and a second end of the first transistor receives a system high voltage andis controlled by a light emitting signal. The first end and the second end of the second transistor are coupled to the second node and the first node respectively, and the control end of the second transistor is coupled to the third node. The third transistor is coupled between the first node and the third node and is controlled by the first scanning signal. The capacitor has a first end and a second end. The voltage setting circuit receives the data signal, the second scanning signal and the third scanning signal. The first end of the light-emitting element is coupled to the second node, andthe second end of the light-emitting element receives the system low voltage.

Description

technical field [0001] The present invention relates to a display device, 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, since the display picture presented by the display panel is easily affected by the threshold voltage (Threshold Voltage) of the driving transistor in the pixel circuit (for example, the driving transistor is subject to long-term operation or process differences), and As a result, light-emitting elements (such as organic light-emitting diodes) are prone to uneven brightness display, which further affects the quality of the display screen. Therefore, how to effectively improve the impact of the threshold voltage on the quality of the display screen will be an important sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G3/3233G09G2300/0819G09G2300/0842G09G2300/0861G09G3/3258G09G3/3266G09G3/3291G09G2300/043G09G2300/0439G09G2300/0809G09G2310/0264
Inventor 杨尚融黄金海吕雅茹刘恩池
Owner CHUNGHWA PICTURE TUBES LTD