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A kind of oled data driving circuit, active tft OLED panel and its driving method based on the circuit

A technology of data driving circuit and current source, applied in the direction of instruments, static indicators, etc., can solve the problems of increasing the complexity of the driving circuit, the source of parasitic capacitance, and the power consumption of data current, so as to achieve fast programming speed and simple structure. , the effect of less hardware increase

Inactive Publication Date: 2016-01-13
贵州传曙科技有限公司
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Problems solved by technology

However, the value of parasitic capacitance is determined by the process, especially the sources of parasitic capacitance on the panel are complex, and it is not easy to reduce the parasitic capacitance by a large margin.
And increasing the data current will bring about the problem of too much power consumption
The way of hybrid driving greatly increases the complexity of the driving circuit

Method used

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  • A kind of oled data driving circuit, active tft OLED panel and its driving method based on the circuit
  • A kind of oled data driving circuit, active tft OLED panel and its driving method based on the circuit
  • A kind of oled data driving circuit, active tft OLED panel and its driving method based on the circuit

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Embodiment Construction

[0062] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0063] figure 1 Schematic diagram of the TFTOLED panel structure. The display panel is composed of a two-dimensional pixel array, gate lines and data lines. At the periphery of the TFTOLED panel, a gate driver and a data driver are required to provide a gate scan signal and a data drive signal respectively. Unlike TFTLCD, TFTOLED is a current-driven display device. Therefore, it is required that the pixel circuit of the TFTOLED can provide a stable driving current, so that the TFTOLED emits light with a corresponding intensity and realizes gray scale display. Here, the type of TFT may be an amorphous silicon TFT, a polysilicon TFT, an organic TFT, or an oxide TFT. Here, only the oxide TFT display panel is taken as an example for illustration, but the driving technology disclosed in the present invention cannot be considered to be limited only to the...

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Abstract

The invention discloses an OLED data driving circuit, an active TFT OLED panel based on the OLED data driving circuit and a driving method of the active TFT OLED panel based on the OLED data driving circuit. The current driving circuit is formed by the following parts including the current feed-forward part, the current feedback part, the comparison amplifier, the dynamic compensation part and the polarization power source. By means of the data driving circuit, current type TFT OLED pixels can be rapidly programmed with high accuracy. A gate driving line of the active TFT OLED panel based on the data driving circuit is two times that of a common panel, pixels in the direction of one gate driving line are divided into two different groups according to the parity of a dateline where the pixels are located, gate scanning time of two sets of pixels in the direction of the same line is respectively a half of the gate scanning time of the common panel, and two gate scanning lines are complemented and sequentially open the pixels in the direction of the same line.

Description

technical field [0001] The invention relates to an OLED data driving circuit, an active TFTOLED panel based on the circuit and a driving method thereof. Background technique [0002] An organic light emitting diode display (organic light emitting diode, OLED) has the advantages of active light emission, high brightness, high contrast ratio, etc., and it is widely considered as a next-generation display technology to replace liquid crystal display (LCD). Different from voltage-driven LCD technology, OLED is a current-mode semiconductor light-emitting device based on organic materials. It generates light through the injection and recombination of carriers, and the luminous intensity is proportional to the injected current. OLED driving methods are divided into passive type (PMOLED) and active type (AMOLED). Among them, a thin-film transistor (TFT) is added to each pixel of the OLED. The AMOLED technology used for OLED programming and driving can overcome the shortcomings of P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3275
Inventor 廖聪维邓联文黄生祥刘胜宋德夫
Owner 贵州传曙科技有限公司
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