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OLED (organic light emitting diode) display unit driving system and OLED display unit driving method

A technology for a display device and a driving system, which is applied to static indicators, instruments, etc., can solve the problems of shortening the life of organic light-emitting diodes, image retention, affecting the display quality of OLED display devices, etc., so as to delay the aging of OLED and improve the life of OLED. Effect

Active Publication Date: 2016-08-24
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

[0006] In the above-mentioned OLED pixel driving method, the organic light-emitting diode D10 is always in an aging state, and the aging degree of each pixel is inconsistent, which will cause image sticking (image sticking) and shorten the life of the organic light-emitting diode. Affects the display quality of OLED display devices

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  • OLED (organic light emitting diode) display unit driving system and OLED display unit driving method
  • OLED (organic light emitting diode) display unit driving system and OLED display unit driving method
  • OLED (organic light emitting diode) display unit driving system and OLED display unit driving method

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Embodiment Construction

[0064] 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.

[0065] see figure 2 , the present invention firstly provides an OLED display device driving system, comprising: a sub-pixel driving circuit 1, and a threshold voltage detection circuit 2 electrically connected to the sub-pixel driving circuit 1;

[0066] The sub-pixel driving circuit 1 includes: a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a first capacitor C1, and an organic light emitting diode D1;

[0067] The threshold voltage detection circuit 2 includes: a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a third capacitor C3, an operational amplifier Y1, a voltage preservation circuit CDS, and an analog-to-digital converter ADC ;

[0068] The gate of the...

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Abstract

The invention provides an OLED (organic light emitting diode) display unit driving system and an OLED display unit driving method. The OLED display unit driving system leads a common voltage signal (Vcm) in a threshold voltage detection circuit (2) into a sub-pixel driving circuit (1) and applies the common voltage signal (Vcm) to an organic light emitting diode (D1) in a write-in stage, so that the organic light emitting diode is at a negative pressure and reverse bias state; then the common voltage signal (Vcm) is removed from the organic light emitting diode (D1) in a lighting stage, so that the organic light emitting diode (D1) boosts from negative pressure to positive pressure and lights normally, the organic light emitting diode (D1) is subjected to alternate current drive of positive pressure and negative pressure when each frame of picture is refreshed, aging of the OLED is delayed, and the service life of the OLED is prolonged. The OLED display unit driving method provided by the invention delays the aging of the OLED and prolongs the service life of the OLED.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display device driving system and an OLED display device 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. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225G09G3/3258
CPCG09G3/3225G09G3/3258G09G3/3291G09G2310/0256G09G2320/0295G09G2320/045G09G2330/12G09G3/3233G09G2310/0264
Inventor 黄泰钧梁鹏飞
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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