Pixel circuit and driving method thereof and organic light emitting display

A pixel circuit and organic technology, applied in the field of organic light-emitting displays, can solve problems such as image sticking, and achieve the effect of avoiding threshold voltage deviation and threshold voltage drift.

Inactive Publication Date: 2017-06-23
KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a pixel circuit and its driving method and an organic light emitting display, so as to solve the problem of image sticking caused by threshold voltage drift in the existing organic light emitting display

Method used

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  • Pixel circuit and driving method thereof and organic light emitting display
  • Pixel circuit and driving method thereof and organic light emitting display
  • Pixel circuit and driving method thereof and organic light emitting display

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Please refer to figure 2 , which is a schematic structural diagram of a pixel circuit according to Embodiment 1 of the present invention. The pixel circuit 20 includes:

[0037] The first transistor M1 is connected between the first power supply ELVDD and the first node N1, and its gate is connected to the first scan line Sn1;

[0038] The second transistor M2 is connected between the data line Dm and the second node N2, and its gate is connected to the second scan line Sn2;

[0039] The third transistor M3 is connected between the second node N2 and the third node N3, and its gate is connected to the first node N1;

[0040] The fourth transistor M4 is connected between the first node N1 and the third node N3, and its gate is connected to the second scan line Sn2;

[0041] The fifth transistor M5 is connected between the first power supply ELVDD and the second node N2, and its gate is connected to the third scan line Sn3;

[0042] The sixth transistor M6 is connect...

Embodiment 2

[0076] Please refer to Figure 4 , which is a schematic structural diagram of a pixel circuit according to Embodiment 2 of the present invention. The pixel circuit 30 includes:

[0077] The first transistor M1 is connected between the first power supply ELVDD and the first node N1, and its gate is connected to the first scan line Sn1;

[0078] The second transistor M2 is connected between the data line Dm and the second node N2, and its gate is connected to the second scan line Sn2;

[0079] The third transistor M3 is connected between the second node N2 and the third node N3, and its gate is connected to the first node N1;

[0080] The fourth transistor M4 is connected between the first node N1 and the third node N3, and its gate is connected to the second scan line Sn2;

[0081] The fifth transistor M5 is connected between the first power supply ELVDD and the second node N2, and its gate is connected to the third scan line Sn3;

[0082] The sixth transistor M6 is connect...

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Abstract

In the pixel circuit and its driving method and the organic light emitting display provided by the present invention, the threshold voltage of the third transistor is compensated by the fourth transistor, so that the current output by the third transistor is provided by the data voltage provided by the data line and the first power supply The provided first power supply voltage is determined regardless of the threshold voltage of the third transistor, so that brightness unevenness caused by threshold voltage deviation can be avoided, thus, the organic light-emitting display using the pixel circuit and its driving method can simultaneously Avoid display problems caused by threshold voltage drift.

Description

technical field [0001] The present invention relates to the field of flat panel display technology, in particular to a pixel circuit, a driving method for the pixel circuit and an organic light-emitting display with the pixel circuit. Background technique [0002] Organic light-emitting display (OLED) is a new type of flat-panel display, which has many advantages such as active light emission, high contrast, fast response, thin and light, and is known as a new generation of display that can replace liquid crystal display (LCD). [0003] Please refer to figure 1 , which is a schematic structural diagram of a pixel circuit of an organic light emitting display in the prior art. Such as figure 1 As shown, the existing pixel circuit 10 includes a first transistor T1, a second transistor T2 and a storage capacitor Cs, the gate of the first transistor T1 is connected to the scan line Sn, and the source of the first transistor T1 is connected to the data The line Dm is connected,...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208
Inventor 杨楠胡思明朱晖张小宝姜海斌
Owner KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
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