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System for sensing pixel driving characteristic of AMOLED (Active Matrix Organic Light Emitting Diode) and AMOLED display device

一种驱动特性、像素驱动电路的技术，应用在静态指示器、仪器等方向，能够解决阳极电压升高、影响数据信号补偿效果、无法准确感测出有机发光二极管阳极电压等问题，达到保证补偿效果、保证准确性、提升图像质量的效果

Active Publication Date: 2016-05-25
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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AI Technical Summary

Problems solved by technology

The existing external compensation technology uses an analog-to-digital converter (AnalogtoDigitalConverter, ADC) to sense the driving characteristics of the AMOLED pixel based on the change of the anode voltage of the sensing organic light-emitting diode OLED or the change of the source voltage of the driving thin film transistor DT, To compensate the input data signal, but with the aging of the organic light-emitting diode OLED or the change of the driving environment, the anode voltage of the organic light-emitting diode OLED will increase, which may exceed the input voltage range of the analog-to-digital converter, resulting in inaccurate Sensing the anode voltage of the organic light-emitting diode affects the compensation effect of the data signal

Method used

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  • System for sensing pixel driving characteristic of AMOLED (Active Matrix Organic Light Emitting Diode) and AMOLED display device
  • System for sensing pixel driving characteristic of AMOLED (Active Matrix Organic Light Emitting Diode) and AMOLED display device
  • System for sensing pixel driving characteristic of AMOLED (Active Matrix Organic Light Emitting Diode) and AMOLED display device

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Embodiment Construction

[0033] 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.

[0034] see figure 2 , the present invention firstly provides a system for sensing AMOLED pixel driving characteristics, including:

[0035] An AMOLED display panel with AMOLED pixels arranged in an array, a sensing module 20 , a data compensation module 30 , and a digital-to-analog converter 40 .

[0036]Wherein, the working process of the AMOLED display panel is divided into a driving phase and a sensing phase, and each AMOLED pixel has a pixel driving circuit 10 . The pixel driving circuit 10 is used for receiving the compensated data signal Data to drive the organic light emitting diode (OLED) therein to emit light during the driving phase. The pixel driving circuit 10 may be selected but not limited to a 2T1C structure, specifically inc...

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Abstract

The invention provides a system for sensing the pixel driving characteristic of an AMOLED (Active Matrix Organic Light Emitting Diode) and an AMOLED display device. The anode voltage of an organic light emitting diode (OLED) in a pixel driving circuit (10) and the output voltage of a variable negative voltage source (21) are connected to a voltage summing circuit (22) at a sensing phase, and the voltage summing circuit (22) inputs the summing result to an analog to digital converter (ADC) (23). The variable negative voltage source (21) is adjusted according to the change of the anode voltage of the OLED, and the input voltage of the ADC (23) can be adjusted under the co-action of the variable negative voltage source (21) and the voltage summing circuit (22) and then is within a sensing range of the ADC (23) all the time, so that the anode voltage of the OLED is accurately measured, the pixel driving characteristic of the AMOLED is ensured, then the compensation effect on data signals is ensured, and the image quality of the AMOLED display device is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a system for sensing AMOLED pixel driving characteristics and an AMOLED display device. 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. [0003] 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. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G09G3/3233
CPCG09G3/006G09G3/3233G09G3/3291G09G2300/0819G09G2300/0842G09G2310/027G09G2320/0295G09G2320/045G09G2330/028G09G3/3258G09G2300/0828G09G2330/04G09G2330/12
Inventor 付舰航
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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