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Pixel circuit

A pixel circuit and capacitor technology, applied in the display field of organic light-emitting diodes, can solve problems such as uneven panel display

Active Publication Date: 2014-01-01
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a pixel circuit, which can improve the problem of panel display unevenness

Method used

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Embodiment Construction

[0056] figure 2 It is a schematic diagram of a pixel circuit according to an embodiment of the present invention. Please refer to figure 2 , the pixel circuit 200 is composed of a transistor 201 , a transistor 202 , a capacitor 203 , a transistor 204 , a capacitor 205 , a transistor 206 , a transistor 207 and an organic light emitting diode 210 . The above-mentioned five transistors all have a first terminal, a second terminal and a control terminal, and the above-mentioned two capacitors all have a first terminal and a second terminal. The first end of the transistor 201 is electrically coupled to the power supply voltage OVDD, and the control end of the transistor 201 receives the enable pulse signal EM due to the electrical coupling. The first terminal of the transistor 202 is electrically coupled to the second terminal of the transistor 201 , and the second terminal of the transistor 202 is electrically coupled to the power supply voltage OVSS through the organic light...

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Abstract

A pixel circuit comprises five transistors, two capacitors and an organic light-emitting diode. First terminals of the first transistor and the third transistor are electrically coupled to a first power voltage. A first terminal of the second transistor is electrically coupled to a second terminal of the first transistor and a first terminal of the fourth transistor; a second terminal of the second transistor is electrically coupled to a second terminal of the fifth transistor and a first terminal of the first capacitor and is coupled to a second power voltage electrically through the organic light-emitting diode; a control terminal of the second transistor is electrically coupled to a second terminal of the fourth transistor and a first terminal of the second capacitor; and a second terminal of the third transistor is electrically coupled to second terminals of the first and second capacitors.

Description

technical field [0001] The present invention relates to the display technology field of organic light emitting diodes, in particular to a pixel circuit of organic light emitting diodes. Background technique [0002] Each pixel circuit in an Organic Light Emitting Diode (OLED) display device generally uses two transistors and a capacitor to control the brightness performance of the OLED. However, the circuit design of existing pixel circuits often causes the problem of uneven panel display, and figure 1 To explain it. [0003] figure 1 It is a schematic diagram of a conventional pixel circuit. Such as figure 1 As shown, the pixel circuit 100 is generally composed of two transistors 101 and 102 , a capacitor 103 and an organic light emitting diode 110 . Each transistor has a first terminal, a second terminal and a control terminal. The first end of the transistor 101 is directly electrically coupled to the power supply voltage OVDD. The first terminal of the transistor ...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/3233G09G2300/0819G09G2300/0842G09G2300/0852G09G2300/0861
Inventor 张华罡林雨仙
Owner AU OPTRONICS CORP
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