Amoled pixel driving circuit and pixel driving method
A pixel driving circuit and power supply technology, which is applied in static indicators, instruments, etc., can solve problems such as the current instability of organic light-emitting diodes, achieve improved display effects, uniform luminous brightness, and solve the effects of threshold voltage drift
Active Publication Date: 2019-09-24
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology
[0011] The purpose of the present invention is to provide an AMOLED pixel drive circuit, which can effectively compensate the threshold voltage of the driving thin film transistor, solve the problem of unstable current flowing through the organic light-emitting diode caused by the drift of the threshold voltage, and ensure that the light-emitting brightness of the organic light-emitting diode is uniform , to improve the display effect of the screen
[0012] The purpose of the present invention is also to provide an AMOLED pixel driving method, which can effectively compensate the threshold voltage of the driving thin film transistor, solve the problem of unstable current flowing through the organic light-emitting diode caused by threshold voltage drift, and ensure the luminous brightness of the organic light-emitting diode Uniform, improve the display effect of the picture
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[0062] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.
[0063] see Figure 4 and Figure 5 , and combined with Figure 6 to Figure 8 , the present invention provides an AMOLED pixel driving circuit, comprising: a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a fourth thin film transistor T4, a fifth thin film transistor T5, a sixth thin film transistor T6, a A capacitor C1, a second capacitor C2, and an organic light emitting diode D1;
[0064] The specific connection method of each element is as follows: the gate of the first thin film transistor T1 is electrically connected to the first node G, the source is connected to the negative power supply voltage OVSS, and the drain is electrically connected to the drain of the third thin film transist...
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The invention provides an AMOLED pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit is of a 6T2C structure, and comprises a first thin film transistor used as a driving thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor, a sixth thin film transistor, a first capacitor, a second capacitor, and an organic light-emitting diode. a first scan signal, a second scan signal, a third scan signal, a data signal voltage, a power positive voltage and a power negative voltage are accessed to the circuit. The circuit can effectively compensate the threshold voltage of the driving thin film transistor. Meanwhile, the problem that the current flowing through the organic light-emitting diode is not stable due to the threshold voltage drift can be solved. Therefore, the light-emitting brightness of the organic light-emitting diode is ensured to be uniform, and the picture display effect is improved.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED pixel driving circuit and a pixel driving method. Background technique [0002] Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. [0003] OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) two categories according to the driving method, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing two types. Among them, AMOLED has pixels arrang...
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IPC IPC(8): G09G3/3233
Inventor 陈小龙
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD