Pixel driving circuit
A technology of pixel driving circuit and transistor, which is used in instruments, static indicators, etc. to improve the display quality
Inactive Publication Date: 2013-11-13
SICHUAN CCO DISPLAY TECH
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In literature: Joon-Chul Goh; Jin Jang; Kyu-Sik Cho; Choong-Ki Kim. A New a-Si:H Thin-Film Transistor Pixel Circuit for Active-Matrix Organic Light-Emitting Diodes, IEEE Electron Device Letters, 2003, 24(9): 583-585, proposed an AMOLED pixel drive circuit, similarly, this pixel drive circuit can only compensate for Vth drift
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[0012] The present invention will be further described below in conjunction with the drawings and specific implementations.
[0013] The pixel drive circuit of the present invention is such as figure 1 As shown, it includes a first transistor TD, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a storage capacitor CC, and a light emitting device, wherein the source of the first transistor TD The source of the third transistor T3 and the drain of the sixth transistor T6 are connected together and connected to the power supply line Vdd through the light emitting device; the gate of the first transistor TD is connected to one end A of the storage capacitor CC, and the other of the storage capacitor One end B is connected to the drain of the fifth transistor T5, the source of the fifth transistor T5 is connected to the data line Vdata, the gate of the fifth transistor T5 is connected to the first control scan line S1;...
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The invention discloses a pixel driving circuit, which comprises six transistors and a storage capacitor, wherein the source of a first transistor, the source of a third transistor and the drain of a sixth transistor are connected together, and are connected with a power wire through a luminescent device; the grid of the first transistor is connected with one end of the storage capacitor; the other end of the storage capacitor is connected with the drain of a fifth transistor; the source of the fifth transistor is connected with a data wire; the grids of the fifth transistor and a fourth transistor are connected with a first control scanning line; the drain of the fourth transistor is connected with the grid of the first transistor; the source of the fourth transistor is connected with the drain of the first transistor and the source of the second transistor; the grids of the second transistor and the third transistor are connected with a second control scanning line; and the drain of the third transistor is connected with the drain of the fifth transistor. In the driving circuit disclosed by the invention, threshold voltage drift and rising of two sections of voltages of the luminescent device can be compensated under the storage actions of the six transistors and the storage capacitor.
Description
Technical field [0001] The invention belongs to the technical field of flat display, and specifically relates to the design of a pixel drive circuit. Background technique [0002] Active Matrix / Organic Light Emitting Diode (AMOLED) is an active matrix organic light emitting diode panel. Compared with traditional liquid crystal panels, AMOLED has the characteristics of faster response, higher contrast, and wider viewing angle. [0003] The traditional voltage-programmed AMOLED pixel driving circuit includes two thin film transistors and a storage capacitor, one of which is a switching TFT and one of which is a driving TFT. When the scan line is turned on, the voltage signal sent by the external circuit is stored in the storage capacitor via the switch TFT. This voltage signal controls the on-current of the driving TFT, which determines the gray scale of the OLED; when the scan line is turned off, it is stored in the storage The voltage in the capacitor can still keep the driving T...
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IPC IPC(8): G09G3/20G09G3/32G09G3/3233
Inventor何小祥
OwnerSICHUAN CCO DISPLAY TECH