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Light-emitting diode display and pixel circuit and driving method thereof

A light-emitting diode and pixel circuit technology, applied in static indicators, instruments, etc., can solve problems such as uneven brightness of light-emitting diode displays, and achieve the effects of improving display quality, improving critical voltage changes, and optimizing circuit compensation time

Active Publication Date: 2012-12-19
AU OPTRONICS CORP
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  • Abstract
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Problems solved by technology

[0004] The present invention proposes a pixel circuit of a light emitting diode display, a driving method thereof and a light emitting diode display. The pixel circuit of the light emitting diode display can improve the problem of uneven brightness of the light emitting diode display caused by the change of the threshold voltage of the driving transistor, and furthermore Complete the compensation action of the organic light emitting diode drive circuit within a limited scan time

Method used

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  • Light-emitting diode display and pixel circuit and driving method thereof
  • Light-emitting diode display and pixel circuit and driving method thereof
  • Light-emitting diode display and pixel circuit and driving method thereof

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Embodiment Construction

[0094] Please refer to figure 1 , figure 1 It is a schematic diagram of a pixel circuit of an LED display according to an embodiment of the present invention. Such as figure 1 As shown, the pixel circuit 100 of the LED display in the embodiment of the present invention includes a transistor M1, a transistor M2, a transistor M3, a transistor M4, a transistor M5, a transistor M6, a capacitor C1, a capacitor C2 and a LED D1. The transistors M1 - M6 may be composed of, for example, field effect transistors or bipolar transistors, preferably P-type thin film transistors.

[0095] Next, the transistor M1 has a first terminal 11 , a control terminal 13 and a second terminal 15 . The first terminal 11 of the transistor M1 is used for receiving the data signal Vdata. The control terminal 13 of the transistor M1 is used for receiving the first control signal S1. The first terminal 11 of the transistor M1 is a source terminal or a drain terminal. The control terminal 13 of the tran...

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Abstract

A light-emitting diode display and a pixel circuit and a driving method thereof are provided. The pixel circuit of the light-emitting diode display comprises a light-emitting diode, six transistors and two capacitors, and receives a first to a fourth control signals and a first to a third reference voltages so as to improve influences caused by critical voltage changes of the transistors. Moreover, a display using the pixel circuit of the light-emitting diode is also disclosed.

Description

technical field [0001] The invention relates to a display pixel circuit and its driving method, in particular to a light emitting diode display pixel circuit and its driving method. Background technique [0002] In recent years, organic light emitting diode displays have the advantages of self-illumination, fast response and low power consumption. The variation of the critical voltage of the driving transistor in the driving circuit will further affect the current for driving the OLED to light. In serious cases, it may cause the problem of uneven brightness display of the OLED. [0003] In addition, with the development of display technology, power saving, high resolution and thinness have become one of the current design trends of displays. However, as the resolution increases, the scan signal lines of the scan driver also increase, and in the high-resolution display environment, the scan time of the scan driver gradually shortens. Therefore, how to improve the problem of...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G2300/0852G09G3/32G09G2300/0861G09G3/3208G09G3/3233
Inventor 刘俊彦杨劲生黄冠儒
Owner AU OPTRONICS CORP
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