Amoled driving system and driving 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: 2018-03-06
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

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  • Amoled driving system and driving method
  • Amoled driving system and driving 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] Such as 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 Dat...

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Abstract

The invention provides an AMOLED driving system and a driving method. The AMOLED drive system adds a test pixel (5) and a compensation unit (4), obtains the brightness of the test pixel (5) through the brightness sensor (42) in the compensation unit (4), and uses the compensation IC (41) to obtain the brightness of the test pixel (5). The brightness calculation of (5) generates a compensation voltage signal (Svn), and the source drive unit (2) sends the compensation voltage signal (Svn) and data signal (Data) to the display unit (1), which can simplify the circuit structure and effectively compensate the driving The threshold voltage of the thin film transistor stabilizes the current flowing through the organic light-emitting diode, ensures uniform luminous brightness of the AMOLED, and improves the display effect of the picture.

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 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. 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 arranged in an array, belong...

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Application Information

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