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Pixel circuit and drive method for same

A technology of pixel circuit and driving method, applied in the direction of instruments, static indicators, etc., can solve the problem of panel display unevenness, achieve the effects of simple manufacturing process, improvement of panel display unevenness, and uniform component characteristics

Inactive Publication Date: 2012-05-16
CPTF VISUAL DISPLAY (FUZHOU) LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a pixel circuit to improve the problem of uneven display of the above panel
[0007] Another object of the present invention is to provide a driving method for a pixel circuit to improve the problem of uneven display of the above panel

Method used

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  • Pixel circuit and drive method for same
  • Pixel circuit and drive method for same
  • Pixel circuit and drive method for same

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Embodiment Construction

[0042] Please refer to figure 2 , figure 2 A circuit diagram of an active organic light emitting display according to a preferred embodiment of the present invention is shown. The active organic light emitting display 20 includes a data driving circuit 22 , a scanning driving circuit 24 , and a plurality of pixel circuits 30 , and only one pixel circuit 30 is shown in the figure as an example. The data driving circuit 22 provides a data signal Vdata through the data line 120 , and the scan driving circuit 24 provides a first scanning signal Vscan1 and a second scanning signal Vscan2 through the first scanning line 242 and the second scanning line 244 respectively.

[0043] In this embodiment, the pixel circuit 30 includes a light emitting diode 310, a storage capacitor Cs, a driving transistor M0, a first switching transistor M1, a second switching transistor M2, and a third switching transistor M3. The light emitting diode 310 is preferably an organic light emitting diode...

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Abstract

The invention discloses a pixel circuit, comprising a light-emitting diode, a storage capacitor, a drive transistor, and the first to the third switch transistors. The drive transistor controls the conduction / turn-off of a power voltage and the light-emitting diode. The first switch transistor receives a first scanning signal and is used for controlling the conduction / turn-off of the control electrode of the drive transistor and the power voltage. The second switch transistor is used for controlling the conduction / turn-off of the storage capacitor and a grounding terminal voltage. The third switch transistor is used for controlling the conduction / turn-off of the storage capacitor and a data voltage, wherein the first scanning signal is inverted with a second scanning signal. The invention further discloses a drive method for a pixel circuit.

Description

technical field [0001] The present invention relates to a pixel circuit and its driving method, in particular to a pixel circuit of an active organic light emitting display and its driving method. Background technique [0002] The pixel circuit of an active organic light emitting display generally adopts a 2T1C (two thin film transistors and a storage capacitor) circuit structure. Please refer to figure 1 , figure 1 A schematic diagram of a pixel circuit of a conventional active organic light emitting display is shown, which includes an N-type switching transistor 102, a P-type driving transistor 104, and a storage capacitor Cs. The control electrode of the switch transistor 102 is connected to the scan line 110, the source is connected to the data line 120, and the drain is connected to one end of the storage capacitor Cs. The other end of the storage capacitor Cs is connected to a reference voltage Vref. The control electrode of the drive transistor 104 is connected to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
Inventor 孙伯彰陈盈惠黄金海周焕庭胡名宏
Owner CPTF VISUAL DISPLAY (FUZHOU) LTD