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Pixel circuit of display device

A display device and pixel circuit technology, applied in the field of pixel circuits, can solve problems such as pixel gray scale deviation, distortion, and lower output voltage or signal voltage value

Active Publication Date: 2012-03-14
HIMAX DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the pixel circuit was mainly composed of passive components such as capacitors and switches. Therefore, it inevitably had a charge sharing effect when transmitting image data signals, which caused a slight drop in the data signals received by the display elements in the pixel circuit. Causes the displayed pixels to have unexpected conditions, such as: the grayscale displayed by the pixel is slightly deviated from the expected pixel grayscale on the data signal, distorted and inaccurate, etc.
The charge redistribution effect often occurs in digital logic circuits. Due to the coupling capacitance inside the component, it will reduce the desired output voltage or signal voltage value in the circuit.

Method used

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Examples

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Embodiment Construction

[0057] The first embodiment of the pixel circuit 100 conforming to the display device is proposed here, please refer to figure 1 . figure 1 It is a schematic diagram illustrating a pixel circuit 100 of a display device according to the first embodiment of the pixel circuit 100. The pixel circuit 100 of the display device includes a first write switch 110, a first write storage unit 120, a first display switch 130, and a display element 150. The first end of the first write switch 110 is coupled to a data line DataLine, and the first write switch 110 is controlled by a first switch voltage Vsw1. The first terminal of the first write memory unit 120 is coupled to the second terminal of the first write switch 110, and the second terminal thereof receives a first reference voltage Vref1. The first write storage unit 120 stores a first data voltage through the first write switch 110. The first terminal of the first display switch 130 is coupled to the first write memory unit 120, w...

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Abstract

The invention provides a pixel circuit of a display device, which enables the value of voltage transmitted to a display element to be approximate to the value of received data voltage so that the pixel circuit can trustily transmit the data voltage to the display element. The pixel circuit of the display device comprises a first write-in switch, a first write-in storing unit, a first voltage following module and the display element. The first voltage following module is used for detecting a first data voltage which is stored in the first write-in storing unit and generating a corresponding first output end voltage on the display element according to the detection result; and the output end of the first voltage following module is controlled by a switch voltage.

Description

Technical field [0001] The present invention relates to a pixel circuit, in particular to a pixel circuit of a display device. Background technique [0002] Flat-panel displays, such as liquid crystal displays (LCD), have the advantages of high image quality, small size, light weight, low driving voltage, and low power consumption. Therefore, they are widely used in camcorders and personal Digital assistants (Personal Digital Assistant, PDA), mobile phones, notebook computers, desktop computer display screens and thin digital televisions and other consumer communications or electronic products, and gradually replace the cathode ray tube (Cathode Ray Tube, CRT) and Become the mainstream technology of displays. [0003] In a general flat display device architecture, the flat display panel is composed of a pixel array, and the pixel array includes a plurality of pixel circuits. In the past, the pixel circuit is mainly composed of passive components such as capacitors and switches. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36
Inventor 颜呈机蓝伟庭梁汉源
Owner HIMAX DISPLAY INC