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Pixel circuit, driving method thereof, and display device

A technology of a pixel circuit and a driving method, which is applied in the field of organic light-emitting diode display, can solve problems such as unavoidable threshold voltage shifts, and achieve the effects of improved display effect, easy implementation, and simple structure

Active Publication Date: 2017-03-15
HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the existing pixel circuit cannot avoid the threshold voltage shift, and provides a pixel circuit that can eliminate the influence of the threshold voltage shift

Method used

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  • Pixel circuit, driving method thereof, and display device
  • Pixel circuit, driving method thereof, and display device
  • Pixel circuit, driving method thereof, and display device

Examples

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Embodiment 1

[0038] This embodiment provides a pixel circuit, such as figure 2 As shown, it includes: switching transistor T1, driving transistor T2, storage capacitor C, organic light emitting diode OLED, and:

[0039] An initialization module, configured to reset the voltage across the storage capacitor C under the control of the upper gate drive signal Sn-1 and the first control signal EM;

[0040] A compensation module, configured to compensate the voltage at one end of the storage capacitor C connected to the gate of the drive transistor T2 under the control of the upper-level gate drive signal Sn-1;

[0041] The light emitting control module is used to determine whether the current passes through the organic light emitting diode OLED under the control of the second control signal EN.

[0042] Among them, the gate drive signal is a signal provided by the gate line to turn on each row of pixels in turn. Since each gate line provides a turn-on signal in turn, the "upper-stage gate dri...

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PUM

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Abstract

The invention provides a pixel circuit, a driving method of the pixel circuit and a display device, and belongs to the technical field of organic light emitting diode display. The pixel circuit can solve the problem that an existing pixel circuit cannot avoid threshold voltage shift. The pixel circuit comprises a switch transistor, a driver transistor, a storage capacitor, an organic light emitting diode, an initialization module, a compensation module and a light-emitting control module, wherein the initialization module is used for resetting the voltages at the two ends of the storage capacitor under control of the upper level of grid drive signals and first control signals, the compensation module is used for carrying out voltage compensation on one end, connected with the grid electrode of the drive transistor, of the storage capacitor under the control of the upper level of grid drive signals, and the light-emitting control module is used for determining whether currents pass thorough the organic light emitting diode under the control of second control signals.

Description

technical field [0001] The invention belongs to the technical field of organic light emitting diode display, and in particular relates to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Organic light-emitting diode (OLED) display devices have many advantages such as large viewing angle, fast response speed, high contrast ratio, energy saving, and strong adaptability, and thus have been applied more and more widely. The most basic pixel circuit for an OLED display device is a 2T1C structure. Such as figure 1 As shown, the pixel circuit of the 2T1C structure includes a switching transistor T1, a driving transistor T2, a storage capacitor C, and an organic light-emitting diode OLED. signal) and the second power supply voltage Vss (low voltage power supply signal, such as grounding) to emit light. Wherein, the luminous intensity of the organic light emitting diode OLED is determined by the current I passing through it, and the cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208H01L27/32G09G3/3233
Inventor 木素真
Owner HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD
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