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A pixel circuit data signal compensation method, device and display panel

A data signal, pixel circuit technology, applied in static indicators, instruments, etc., can solve problems such as pixel brightness deviation, and achieve the effect of reducing brightness deviation

Active Publication Date: 2020-06-23
BOE TECH GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing compensation method is usually to sense the characteristic parameters of the driving TFT when the display device is turned off. When the display device displays normally, the characteristic parameters of the driving TFT will change during the OLED light-emitting process, so that Even if the drive current changes, it will still cause brightness deviation between different pixels

Method used

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  • A pixel circuit data signal compensation method, device and display panel
  • A pixel circuit data signal compensation method, device and display panel
  • A pixel circuit data signal compensation method, device and display panel

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Embodiment Construction

[0064] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0065] Can refer to figure 1 A pixel circuit of an existing AMOLED display device includes a switching transistor (TFT) and a driving TFT. Wherein, the switching TFT is connected to the data signal line, the scanning signal line and the driving TFT, and the driving TFT is connected to the input voltage terminal, the switching TFT and the light emitting element respectively. The switch TFT turns on the data signal line and the driving TFT in response to the scanning signal of the scanning signal line, and the driving TFT t...

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Abstract

Embodiments of the present disclosure provide a data signal compensation method for a pixel circuit, including: inputting a test signal to the data signal line, and detecting a real-time voltage at the first node after a first preset time elapses; comparing the real-time voltage with a preset voltage, and in response to the real-time voltage being deviated from the preset voltage, adjusting an initial compensation value for a mobility, so as to make the real-time voltage be consistent with the preset voltage, wherein the preset voltage is set by obtaining an initial threshold voltage for the driving transistor; generating a compensation test signal and inputting the compensation test signal to the data signal line; and generating a test signal, inputting the generated test signal to the data signal line, and sensing a first voltage at the first node after a first preset time elapses as the preset voltage.

Description

technical field [0001] The invention relates to the field of display technology. More specifically, it relates to a pixel circuit data signal compensation method, device and display panel. Background technique [0002] AMOLED (Active Matrix Organic Light Emitting Diode) technology is the development trend of Mobile products. AMOLED display devices have self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180-degree viewing angle, and operating temperature range. It can realize many advantages such as flexible display and large-area full-color display. AMOLED is a current-driven device, and each pixel in the display device includes a driving transistor (TFT) to control the driving current flowing into the OLED to control the luminance of the OLED. However, due to factors such as different process conditions and driving environments for driving TFTs, the same data signal causes different input AMOLED driv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3225G09G3/3258
CPCG09G3/3225G09G3/3258G09G2320/0233G09G3/3233G09G2300/0819G09G2320/0295G09G2320/045G09G3/006G09G2330/12
Inventor 陈燚杨飞孟松
Owner BOE TECH GRP CO LTD
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