AMOLED drive system and drive method

A driving system and source driving technology, applied in the direction of instruments, static indicators, etc., can solve the problems of unstable light emission of organic light-emitting diode D, affecting the screen display effect, and complicated circuit structure, so as to improve the display effect and compensate the threshold voltage. , the effect of simplifying the circuit structure

Active Publication Date: 2016-01-13
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

As the usage time of the AMOLED increases, the threshold voltage of the driving thin film transistor (that is, the second thin film transistor T2) will drift, resulting in a change in the current flowing through the organic light emitting diode D, resulting in unstable light emission and poor brightness of the organic light emitting diode D. Uniformity, which greatly affects the display effect of the screen
The traditional method to improve the unevenness of AMOLED brightness is to introduce various forms of pixel compensation circuits on the basis of 2T1C pixel drive circuits, but the overall circuit structure is relatively complicated

Method used

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  • AMOLED drive system and drive method
  • AMOLED drive system and drive method

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Embodiment Construction

[0053] 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.

[0054] Please also see figure 2 and image 3 The present invention firstly provides an AMOLED drive system, including: a display unit 1, a source drive unit 2 electrically connected to the display unit 1, a gate drive unit 3 electrically connected to the display unit 1, and The source driving unit 2 is electrically connected to the compensation unit 4 , and a test pixel 5 is electrically connected to the source driving unit 2 and the gate driving unit 3 .

[0055] like image 3 As shown, the test pixel 5 is arranged outside the display unit 1 , that is, in the non-display area of ​​the AMOLED display device. The gate drive unit 3 provides the scan signal Gate to the test pixel 5 , and the source drive unit 2 provides the data signal Data t...

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Abstract

The invention provides an AMOLED drive system and a drive method. The AMOLED drive system is additionally provided with a test pixel (5) and a compensation unit (4), brightness of the test pixel (5) is obtained through a brightness sensor (42) in the compensation unit (4), a compensation voltage signal (Svn) is calculated and generated through a compensation IC (41) according to the brightness of the test pixel (5), and a source pole drive unit (2) sends the compensation voltage signal (Svn) and a data signal (Data) to a display unit (1). The circuit structure can be simplified, a threshold voltage driving a thin-film transistor is effective compensated, a current flowing through an organic light-emitting diode is stable, light-emitting brightness of an AMOLED is guaranteed to be uniform, and a display effect of a frame is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED driving system and a 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 large-area comprehensive display. With many advantages such as color display, it is recognized by the industry as the display device with the most development potential. OLED display devices can be divided into two categories: passive matrix OLED (PassiveMatrixOLED, PMOLED) and active matrix OLED (ActiveMatrixOLED, AMOLED) according to the driving method, namely direct addressing and thin film transistor (ThinFilmTransistor, TFT) matrix addressing. kind. Among them, AMOLED has pixels arranged in an array,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233
Inventor 徐向阳
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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