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Organic light-emitting display and its pixel circuit, driving method of the pixel circuit

A light-emitting display and pixel circuit technology, which is applied to circuits, static indicators, instruments, etc., can solve the problems of low integration of pixel circuits and uneven light emission of organic light-emitting displays, so as to increase the number of pixels, eliminate uneven light emission, reduce The effect of power loss

Active Publication Date: 2016-03-16
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the problems of non-uniform luminescence of organic light-emitting displays and low integration of pixel circuits of organic light-emitting displays

Method used

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  • Organic light-emitting display and its pixel circuit, driving method of the pixel circuit
  • Organic light-emitting display and its pixel circuit, driving method of the pixel circuit
  • Organic light-emitting display and its pixel circuit, driving method of the pixel circuit

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Experimental program
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Effect test

Embodiment 1

[0044] figure 2 is the driving signal timing diagram of the pixel circuit according to Embodiment 1 of the present invention, wherein the gate of the third transistor M3 receives the first scan signal S1, the gate of the second transistor M2 and the gate of the fifth transistor M5 The gate receives the second scanning signal S2, and the gates of the first transistor M1 and the sixth transistor M6 receive the control signal Emit.

[0045] refer to figure 1 with figure 2 , in the initialization phase T31, a control signal Emit with a first voltage amplitude is applied to the gate of the first transistor M1 and the gate of the sixth transistor M6, and the control signal Emit with a first voltage amplitude Turning on the first transistor M1 and the sixth transistor M6; applying a first scan signal S1 with a first voltage amplitude to the gate of the third transistor M3, and the first scan signal S1 with a first voltage amplitude The first scanning signal S1 turns on the third...

Embodiment 2

[0059] image 3 It is a timing diagram of driving signals of the pixel circuit in Embodiment 2 of the present invention. The signals applied to the pixel circuit in the initialization phase T41, the data writing phase T44 and the light emitting phase T46 are similar to those in Embodiment 1, and will not be repeated here. In the following, only the transitional stages between the above three stages will be described.

[0060] refer to image 3 , during the first time period T42 between the initialization phase T41 and the data writing phase T44, applying the control signal Emit with the second voltage amplitude to the gate of the first transistor M1 and the The gate of the sixth transistor M6 is used to cut off the first transistor M1 and the sixth transistor M6; the first scanning signal S1 with the first voltage amplitude is applied to the gate of the third transistor M3, Turning on the third transistor M3; applying the second scan signal S2 with the second voltage amplitu...

Embodiment 3

[0067] Figure 4 It is a timing diagram of driving signals of the pixel circuit in Embodiment 3 of the present invention. The signals applied to the pixel circuit in the initialization phase T51, the data writing phase T54 and the light emitting phase T56 are similar to those in Embodiment 1, and will not be repeated here. In the following, only the transitional stages between the above three stages will be described.

[0068] refer to Figure 4 , during the fourth time period T52 between the initialization phase T51 and the data writing phase T54, applying the control signal Emit with the first voltage amplitude to the gate of the first transistor M1 and the The gate of the sixth transistor M6 turns on the first transistor M1 and the sixth transistor M6; applying the first scanning signal S1 with the second voltage amplitude to the gate of the third transistor M3 , turning off the third transistor M3; applying the second scanning signal S2 with the second voltage amplitude ...

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Abstract

Provided is an organic light emitting displayer and a pixel circuit thereof, and a driving method for the pixel circuit. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a capacitor and an organic light emitting diode. The first electrode of the third transistor is connected with the second electrode of the first transistor. According to the pixel circuit, threshold drift caused by technology and voltage drop caused by a load circuit can be compensated, a problem of non-uniform light emission of a display device is eliminated, integration level of the pixel circuit is enhanced, a peripheral driving circuit is simplified and circuit power consumption is reduced.

Description

technical field [0001] The present invention relates to the technical field of organic light emitting displays, in particular to an organic light emitting display, a pixel circuit thereof, and a driving method for the pixel circuit. Background technique [0002] Compared with traditional liquid crystal panels, Active Matrix Organic Light Emitting Diode (AMOLED, ActiveMatrixOrganicLightEmittingDiode) panels have many advantages such as fast response speed, high contrast ratio, and wide viewing angle. [0003] AMOLED display panels usually use thin film transistors to construct pixel circuits to provide corresponding driving currents for organic light emitting display diodes (OLED, Organic Light Emitting Diode). However, due to the limitations of the manufacturing process, the thin film transistors in the pixel circuit often have non-uniformity in electrical parameters such as threshold voltage and mobility, which will cause differences in driving current and brightness of OLE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3225H01L27/32G09G3/3233
Inventor 钱栋顾寒昱
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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