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Pixel circuit of active organic electroluminescence displayer and driving method of pixel circuit

A pixel circuit and electroluminescence technology, applied in static indicators, instruments, etc., can solve the problems of increasing the difficulty of pixel circuit wiring and high requirements for driving chips

Active Publication Date: 2014-08-27
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned method can reach the speed of 2T1C pixel circuit, but for the advantage of simple control of 2T1C pixel circuit, these pixel circuits cannot be well satisfied, because the above-mentioned pixel circuit needs at least two or more control signals. The driver chip requirements become higher, which also increases the difficulty of wiring between pixel circuits

Method used

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  • Pixel circuit of active organic electroluminescence displayer and driving method of pixel circuit
  • Pixel circuit of active organic electroluminescence displayer and driving method of pixel circuit
  • Pixel circuit of active organic electroluminescence displayer and driving method of pixel circuit

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Embodiment 1

[0061] Such as Figure 4 As shown, the general structure of the display device of the active organic electroluminescent display of the present embodiment 1, in the figure: the data input driver V DATA, the first scan driver Scan1, the second scan driver Scan2, the third scan driver Scan3, the fourth scan driver Scan4, and the fifth scan driver Scan5. The device basically consists of pixel array part Pixel, scan drivers (Scan1, Scan2, Scan3, Scan4, Scan5) and data input drivers. The pixel array components are connected to scan lines Scan1, Scan2, Scan3, Scan4 and Scan5 arranged in rows, and data signal lines V arranged in columns. DATA , the pixel array part also includes a plurality of power supply lines for providing the first potential V required for the operation of the pixel ref , the second potential VSS and the third potential VDD. The first potential Vref required for the operation of the pixel is used for a predetermined potential setting, the second potential VSS i...

Embodiment 2

[0071] Such as Figure 7 Shown is the general structure of the display device of the active organic electroluminescence display of the second embodiment. The device basically consists of pixel array part Pixel, scan drivers (Scan1, Scan2, Scan3, Scan4) and data input drivers. The pixel array components are connected to the scan lines Scan1, Scan2, Scan3 and Scan4 arranged in rows, and the data signal lines V arranged in columns. DATA , the pixel array part also includes a plurality of power supply lines for providing the first potential V required for the operation of the pixel ref , the second potential VSS and the third potential VDD. The first potential Vref required for the operation of the pixel is used for a predetermined potential setting, the second potential VSS is also used for grounding, and the third potential VDD is used for supplying power supply to the pixel. The display device of the organic electroluminescence display only includes four scan drivers, which ...

Embodiment 3

[0081] Such as Figure 10 Shown is the general structure of the display device of the active organic electroluminescence display of the third embodiment. The device basically consists of pixel array part Pixel, scan driver (Scan1, Scan2) and data input driver. The pixel array components are connected to scan lines Scan1 and Scan2 arranged in rows, and data signal lines V arranged in columns. DATA , the pixel array part also includes a plurality of power supply lines for providing the first potential V required for the operation of the pixel ref , the second potential VSS and the third potential VDD. The first potential Vref required for the operation of the pixel is used for a predetermined potential setting, the second potential VSS is also used for grounding, and the third potential VDD is used for supplying power supply to the pixel. The display device of the organic electroluminescent display only includes two scan drivers, which realizes the multiplexing of the two sca...

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Abstract

The invention discloses a pixel circuit of an active organic electroluminescence displayer and a driving method of the pixel circuit. The pixel circuit is arranged at the crossing part of a scanning line which provides the row form of control signals and a signal line which provides the column form of data signals. The pixel circuit comprises a first switch transistor, a second switch transistor, a third switch transistor, a fourth switch transistor, a driving transistor, an organic light-emitting diode, a first capacitor and a second capacitor. The pixel circuit can compensate the threshold voltage drift (including positive threshold voltage and negative threshold voltage) of the transistors, control signal multiplexing is carried out on several adjacent pixel rows, accordingly, the number of control signal lines is reduced, and the requirement for periphery driving is lowered. Therefore, cost is lowered, a high-speed programming mode can be achieved, and the active organic electroluminescence displayer is suitable for large-size and high-resolution displaying.

Description

technical field [0001] The invention mainly relates to a pixel driving technology of an active organic electroluminescent display, and in particular to a pixel circuit of an active organic electroluminescent display and a driving method thereof. Background technique [0002] Active matrix organic light emitting diode display (Active Matrix Organic Light Emitting Diode: AMOLED) is an emerging flat panel display technology. With the advantages of wide range, light and thin volume, and easy realization of flexible display and large-screen display, it has broad market prospects and has received extensive attention from scientists and industries in the field of flat panel display. [0003] AMOLED pixel circuits can be divided into voltage-driven circuits and current-driven circuits according to different data signals. However, since the signal delay phenomenon of the current driving pixel circuit is significant, and there is still no very effective solution so far, the current r...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3233
Inventor 吴为敬夏兴衡李冠明周雷张立荣王磊彭俊彪
Owner SOUTH CHINA UNIV OF TECH
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