A pixel circuit, its driving method, and a display device
A pixel circuit and drive unit technology, applied in static indicators, instruments, etc., can solve problems that affect the display effect of OLED displays, uneven brightness, and impact
Active Publication Date: 2019-04-26
BOE TECH GRP CO LTD +1
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Problems solved by technology
[0003] However, in the actual production of thin film transistors (Thin Film Transistor, TFT for short), the ELA (Excimer Laser Annealing, excimer laser annealing) and doping (Doping) processes applied cannot guarantee the good uniformity of the TFT, thus There are deviations in threshold voltage (Vth) and mobility. Among them, the mobility is related to μ in the current formula. For the most basic 2T1C (two TFTs with switching function and one capacitor with charge storage function) circuit, When the same data (Data) signal is written, the brightness of each pixel (pixel) will be uneven due to the existence of different Vth and μ in the current formula, which will cause problems such as poor display and affect the display effect of OLED displays.
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[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0052] An embodiment of the present invention provides a pixel circuit, such as Figure 1(a) , 1(b) , 2(a), and 2(b), Fig. 1(a) and Fig. 2(a) are respectively a pixel circuit according to an embodiment of the present invention, including: a data writing unit 11, a compensating unit 12, a driving unit 13. A reset unit 14 , a first light emission control unit 15 , a second light emission control unit 16 , a light emission unit 17 , and a first energy storage un...
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The invention provides a pixel circuit, a driving method thereof, and a display device, relating to the field of display technology, and improving the uneven brightness of the display device due to the influence of Vth and mobility. The pixel circuit includes a data writing unit, a compensation unit, a driving unit, a reset unit, a first light emitting control unit, a second light emitting control unit, a light emitting unit, and a first energy storage unit; the data writing unit is connected to a data signal line, a first The scanning terminal and the first node; the compensation unit is connected to the first node, the second node and the second scanning terminal; the driving unit is connected to the first level terminal, the second node and the third node; the reset unit is connected to the data signal line, the third scanning terminal and the third node; the first lighting control unit is connected to the third node, the fourth scanning terminal and the input terminal of the lighting unit; the second lighting control unit is connected to the input terminal of the lighting unit, the output terminal of the lighting unit and the fifth scanning terminal; the output of the lighting unit terminal is connected to the second level terminal; the first energy storage unit is connected to the first level terminal and the second node.
Description
technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] In recent years, thanks to the excellent display effect of organic light emitting diode (OLED) displays, OLED-related industries at home and abroad have developed rapidly, and various pixel circuits have been developed one after another. [0003] However, in the actual production of thin film transistors (Thin Film Transistor, TFT for short), the ELA (Excimer Laser Annealing, excimer laser annealing) and doping (Doping) processes applied cannot guarantee the good uniformity of the TFT, thus There are deviations in threshold voltage (Vth) and mobility. Among them, the mobility is related to μ in the current formula. For the most basic 2T1C (two TFTs with switching function and one capacitor with charge storage function) circuit, When the same data (Data) signal is written, the ...
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IPC IPC(8): G09G3/3208G09G3/3233G09G3/3266
CPCG09G3/3208G09G3/3233G09G3/3266G09G2300/0819G09G2300/0814G09G2320/045G09G2310/0251G09G2300/0426G09G2300/0842G09G2320/0233G09G2330/028
Inventor 徐映嵩
Owner BOE TECH GRP CO LTD