AMOLED pixel driving circuit and pixel driving method

A technology of pixel driving circuit and driving method, which is applied in the direction of instruments, static indicators, etc., can solve the problems of difficulty in providing high-quality picture display, inability to guarantee the darkness of black picture, uneven brightness of color difference, etc., so as to avoid uneven display , Provide screen display, high-quality screen display effect

Inactive Publication Date: 2018-05-04
TRULY HUIZHOU SMART DISPLAY
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Problems solved by technology

[0004] One of the main problems that AMOLED needs to overcome is that the backplane needs to be driven by a low-temperature polysilicon thin-film transistor (LTPS TFT) circuit, and the uneven threshold value of the thin-film transistor TFT and the IR drop of the power line will cause the displa

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  • AMOLED pixel driving circuit and pixel driving method
  • AMOLED pixel driving circuit and pixel driving method
  • AMOLED pixel driving circuit and pixel driving method

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Embodiment 1

[0033] Such as figure 1 As shown, this embodiment relates to an AMOLED pixel driving circuit, including a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, and a first storage capacitor C1 , a second storage capacitor C2, a light emitting diode OLED;

[0034] The source of the first transistor T1 is connected to the first voltage terminal VDD, and its gate serves as the first node N1 and is connected to the first end of the first storage capacitor C1 and the first end of the second storage capacitor C2. The second terminal of the capacitor C1 is also connected to the first voltage terminal VDD, and its drain is connected to the source of the second transistor T2;

[0035] The gate of the second transistor T2 is connected to the light emission control signal EM, and its drain is connected to the anode of the light emitting diode OLED;

[0036] Both the source and the gate of the third tran...

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Abstract

The invention provides an AMOLED pixel driving circuit and a pixel driving method. The pixel driving circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor,a fifth transistor, a sixth transistor, a first storage capacitor, a second storage capacitor and a light-emitting diode which are connected with a first voltage end, a second voltage end, a light-emitting control signal, a reset signal end, a data input end, a scanning signal end and a reset voltage end correspondingly; the pixel driving method comprises an initialization step, a threshold valuestorage step, a data writing-in step and a light emitting step. According to the AMOLED pixel driving circuit and the pixel driving method provided by the invention, the influences of threshold voltage on light emission is compensated by correcting the data voltage, meanwhile, the display nonuniformity caused by IR voltage drop is avoided, the picture display quality is improved, moreover, through resetting of an OLED, the anode of the OLED is at a relatively low electric potential under a black picture, ghost appearing on the picture is avoided, in addition, the darkness of the black pictureis improved, and thus high-quality image display is provided.

Description

technical field [0001] The invention relates to the technical field of pixel driving of OLED or other organic electroluminescent devices, in particular to an AMOLED pixel driving circuit and a pixel driving method. Background technique [0002] With the development of information-oriented society, various performance requirements in the display field are constantly increasing. Therefore, it is necessary to study various flat-panel display devices that are thin, light and have low power consumption. For example, flat-panel display devices are classified as liquid crystal displays. (LCD) equipment, plasma display panel (PDP) equipment, active matrix organic light emitting diode (OLED) equipment, etc. [0003] Among OLED display devices, AMOLED (Active Matrix / Organic Light Emitting Diode, Active Matrix Organic Light Emitting Diode) has the advantages of thinner and lighter, self-illumination, low radiation, high contrast, fast response and low energy consumption. It is widely ...

Claims

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Application Information

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IPC IPC(8): G09G3/3225
CPCG09G3/3225
Inventor 吴锦坤周吉胡君文谢志生苏君海李建华
Owner TRULY HUIZHOU SMART DISPLAY
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