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Pixel compensation circuit

A technology for compensating circuits and pixels, applied in static indicators, instruments, etc., can solve problems such as rise in voltage, variation, poor display, etc., and achieve the effect of reducing uneven brightness

Active Publication Date: 2014-10-29
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the active organic light emitting diode display has the above-mentioned advantages, its transistors are prone to variation in critical voltage due to the influence of the manufacturing process or long-term use, resulting in uneven brightness of the active organic light emitting diode display. Under time operation, the cross-voltage will rise, which will affect the gate-source cross-voltage of the transistor, resulting in poor display. In addition, since the organic light-emitting diode is a current-driven component, if the internal resistance of the organic light-emitting diode increases, the It will lead to an increase in voltage drop and affect the gate-source cross-voltage of the transistor, resulting in poor display problems

Method used

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Embodiment Construction

[0029] see figure 1 , figure 1 It is Embodiment 1 of the pixel compensation circuit of the present invention, which includes a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a switch unit SW, and a light emitting diode D1, and a capacitor Cst, wherein the first transistor M1, the second transistor M2, the third transistor M3, the fourth transistor M4, and the fifth transistor M5 can be N-type transistors. The first transistor M1, the third transistor M3, the fourth transistor M4, the fifth transistor M5, and the switch unit SW are used to receive a switch signal, and turn on or off according to the switch signal to form a loop, and the switch signal may include a A first switch signal S1, a second switch signal S2, a third switch signal S3, and a fourth switch signal S4.

[0030] The gate terminal of the aforementioned first transistor M1 is used to receive the second switching signal S2, and its first termi...

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Abstract

The invention discloses a pixel compensation circuit comprising first to fifth transistors, a switching unit, and a lighting diode; the first to fifth transistors and the switching unit are used for receiving a switching signal so as to make the pixel compensation circuit automatically compensation critical voltage of the transistors according to the compensation signal; driving current of the lighting diode is not affected by the critical voltage of the transistors or voltage drop generated by the diode ends.

Description

technical field [0001] The present invention relates to a pixel compensation circuit, in particular to a pixel compensation circuit for compensating critical voltage and driving current. Background technique [0002] When the existing active organic light emitting diode (AMOLED) is applied to a display, due to its advantages of thinness, high efficiency, and high color saturation, it has become a major display technology in recent years. Although the active organic light emitting diode display has the above-mentioned advantages, its transistors are prone to variation in critical voltage due to the influence of the manufacturing process or long-term use, resulting in uneven brightness of the active organic light emitting diode display. Under time operation, the cross-voltage will rise, which will affect the gate-source cross-voltage of the transistor, resulting in poor display. In addition, since the organic light-emitting diode is a current-driven component, if the internal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
CPCG09G3/3233G09G2300/0814G09G2300/0819G09G2300/0852G09G2310/0262G09G2320/043G09G2320/045G09G3/3258G09G2320/0209G09G2320/0233
Inventor 曾卿杰
Owner AU OPTRONICS CORP