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Pixel circuit and organic light emitting display

A pixel circuit and lighting control technology, applied to static indicators, instruments, etc., can solve the problems of uneven pixel circuit current, uneven display brightness, etc.

Active Publication Date: 2013-07-31
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of the threshold voltage Vth drift of the thin-film transistor inherent in low-temperature polysilicon technology causes uneven current output by the pixel circuit, which also makes the display brightness uneven

Method used

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  • Pixel circuit and organic light emitting display
  • Pixel circuit and organic light emitting display
  • Pixel circuit and organic light emitting display

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Embodiment Construction

[0039] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0040] An embodiment of the present invention provides a pixel circuit, such as figure 1 As shown, the pixel circuit includes a driving thin film transistor DTFT and a light emitting diode OLED, and the light emitting diode OLED is connected in series between the low level input terminal ELVSS and the high level input terminal ELVDD of the driving power supply.

[0041]Wherein, the pixel circuit further includes a first capacitor C1 and a drive control unit 10, the first end of the first capacitor C1 is connected to the first electrode of the drive thin film transistor DTFT (the source and drain of the drive thin film transistor DTFT) through the drive control u...

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Abstract

The invention relates to a pixel circuit and an organic light emitting display. The invention provides the pixel circuit which comprises a drive thin film transistor and a light emitting diode, wherein the light emitting diode is connected in series between a low level input end and a high level input end of a drive power supply. The pixel circuit further comprises a first capacitor and a drive control unit, wherein a first end of the first capacitor is electrically connected with a first pole of the drive thin film transistor by the drive control unit; a second end of the first capacitor is connected with a grid of the drive thin film transistor; a second pole of the drive thin film transistor is electrically connected with the grid of the drive thin film transistor by the drive control unit; and the drive control unit is connected with a grid line and a data line. The invention further provides the organic light emitting display. The pixel circuit can output the uniform current, so that the brightness of a light emitting diode in the pixel circuit is uniform, and the display brightness of the organic light emitting display comprising the pixel circuit is uniform.

Description

technical field [0001] The present invention relates to the field of organic light emitting display, in particular to a pixel circuit and an organic light emitting display including the pixel circuit. Background technique [0002] AMOLED (Active Matrix / Organic Light Emitting Diode) shows that the luminance of the backplane is proportional to the driving current supplied to OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode). In order to achieve the best display effect, a larger driving current is required. Low-temperature polysilicon technology is the best choice for AMOLED display backplanes because of its high mobility. However, the problem of the threshold voltage Vth drift of the thin film transistor inherent in the low-temperature polysilicon technology causes uneven current output by the pixel circuit, which also makes the display brightness uneven. [0003] Therefore, how to make the pixel circuit output a uniform current has become an urgent technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/3233G09G3/3208G09G2300/0819G09G2300/0852G09G2300/0861G09G2300/0866G09G2310/0251G09G2320/0233G09G2320/043
Inventor 王颖
Owner BOE TECH GRP CO LTD
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