amoled drive system and amoled drive method

Abstract

The invention discloses an AMOLED driving system and an AMOLED driving method. The AMOLED driving system comprises a driving voltage generating module, a first voltage dividing module, a second voltage dividing module, a first driving voltage output module, a second driving voltage output module, a detection control voltage output module, a display panel, and a detection voltage generating module. The first driving voltage output module, the second driving voltage output module, the detection control voltage output module are controlled through a Powersel to output different voltage combinations at different display stages. According to the AMOLED driving system and the AMOLED driving method, an organic light-emitting diode and a driving thin film transistor thereof in the display panel can be reversely biased without affecting normal display of the display panel when the display panel displays a black picture, thereby further suppressing the threshold voltage shift of the driving thin film transistor, and prolonging the service life of the organic light-emitting diode.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED driving system and an AMOLED 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 ) There are two types of matrix addressing. Among them, AMOLED has pixe...

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Problems solved by technology

[0006] exist figure 1 In the AMOLED pixel drive circuit shown, the first drive voltage Ovdd is a constant high potential, and the second drive voltage Ovss is a constant low potential, which will not only waste energy consumption, but also when the AMOLED pixel drive circuit is working, the organic light emitting diode D10 and the second The second thin film transistor T20 is under forward bias control during the black insertion stage and the normal display stage. Long-term forward bias control will lead to a reduction in the life of the organic light emitting diode D10, and the threshold voltage of the second thin film transistor T20 will shift, thereby Causes the AMOLED display device to fail to work normally, seriously affecting the stability of the AMOLED display device

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