Pixel unit driving circuit, driving method, pixel unit and display device

一种像素单元、驱动电路的技术，应用在像素单元和显示装置,像素单元驱动电路领域，能够解决存储电容充电速度慢、充电时间长等问题，达到加快充电速度、好漏电流负反馈功能、保证稳定工作的效果

Active Publication Date: 2012-10-03
BOE TECH GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a pixel unit driving circuit, a driving method, a pixel unit and a display device, which are used to solve the problem that the existing pixel unit driving technology causes the storage capacitor Cst to be charged at a slow rate, especially at low gray scales, and the charging time is very short. Long, not suitable for high resolution, high refresh rate AMOLED display problems

Method used

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  • Pixel unit driving circuit, driving method, pixel unit and display device
  • Pixel unit driving circuit, driving method, pixel unit and display device
  • Pixel unit driving circuit, driving method, pixel unit and display device

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Embodiment Construction

[0040] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0041] Such as figure 2 As shown, the embodiment of the present invention provides a pixel unit driving circuit, including:

[0042] Light emitting device ( figure 2 Taking the light-emitting device as an OLED as an example), its first end is connected to the first level;

[0043] The sixth transistor T6, the drain of which is connected to the second end of the light emitting device;

[0044] The drain of the first transistor T1 is connected to the source of the sixth transistor T6, and the source is connected to the second level;

[0045] The storage capacitor Cst has its first end connected to the gate of the first transistor T1, the first control node G, and the third control node Q respectively, and its second end connected to...

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Abstract

The invention provides a pixel unit driving circuit, a driving method, a pixel unit and a display device which are used for solving the problems that with the existing pixel unit driving technology, the storage capacitor Cst is slow in charging speed, long in charging time especially under low gray scale, and inapplicable to displaying of high-resolution and high-refresh frequency AMOLED (Active Matrix / Organic Light Emitting Diode). The pixel unit driving circuit consists of a sixth transistor, a switching unit, a storage capacitor, a first transistor and a second transistor. According to the technical scheme, the charging speed of the storage capacitor is quickened; and furthermore, the good leakage current negative feedback function of the storage capacitor Cst is achieved, so that the circuit can be well ensured to stably work.

Description

technical field [0001] The present invention relates to the technical field of display driving, in particular to a pixel unit driving circuit, a driving method, a pixel unit and a display device. Background technique [0002] The AMOLED can emit light because it is driven by the current generated when the driving TFT is in a saturated state, that is, the current drives to emit light. Figure 1A It is the schematic diagram of the existing basic current mode AMOLED (active matrix organic light emitting diode panel) pixel structure, Figure 1B Its corresponding sequence diagram. Such as Figure 1A As shown, the existing basic current mode AMOLED pixel structure includes OLED, T1, T2, T3, T4 and storage capacitor Cst, wherein T1 is a driving thin film transistor, T2, T3, T4 are controlling thin film transistors, the gate of T2 and the gate of T3 The gate is connected to the control line for outputting the control signal CN1, and the gate of T4 is connected to the control line f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/30G09G3/32G09G3/3233G09G2300/0842G09G2320/0252G09G3/3225
Inventor 青海刚祁小敬
Owner BOE TECH GRP CO LTD
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