A method and apparatus for temperature compensation, and display device

A temperature compensation device and temperature compensation technology, applied in static indicators, instruments, etc., can solve problems such as reduced picture quality, smaller K and Vth, and unstable drive current

Active Publication Date: 2019-01-08
BOE TECH GRP CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

During the light emitting process of the OLED Panel, the temperature will rise, and the temperature rise will make the K and Vth of the TFT smaller, which will lead to the instability

Method used

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  • A method and apparatus for temperature compensation, and display device
  • A method and apparatus for temperature compensation, and display device
  • A method and apparatus for temperature compensation, and display device

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[0080] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0081] Since the OLED display device controls the driving current Ioled by the gate-source voltage difference Vgs of the driving transistor, the display mode of the brightness is controlled. In practical applications, the display brightness is not only related to the gate voltage, but also related to the mobility K and the threshold voltage Vth of the driving transistor. The current flowing through the driving transistor can be expressed by the following formula:

[0082] I OLED =1 / 2K·Cox·W / L·(Vgs-Vth) 2

[0083] Among them, K is the carrier mobility of the driving transistor, Cox is the gate oxide capacitance, W / L is the aspect ratio of the driving transistor, Vgs is the gate-source voltage difference of the driving tr...

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PUM

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Abstract

The invention provides a method and an apparatus for temperature compensation, and a display device. The method and the apparatus are used for performing temperature compensation on a data line signalin the display device, wherein the method for temperature compensation comprises the steps of determining the temperature value of the driving transistor according to the photoelectric display signalof the display device and/or the anode voltage signal of the light emitting device, calculating the electric parameter offset of the driving transistor according to the temperature value, and carrying-out real-time temperature compensation on the data line signal such as the gate voltage. The influence of the temperature rise on the electric parameter in the display process is considered in the temperature compensation process, and the residual image and the Mura under the low gray scale can be avoided compared with the prior art, thereby improving the display picture quality.

Description

Technical field [0001] The present invention relates to the field of display technology, in particular to a temperature compensation method and device, and a display device. Background technique [0002] In the display field, OLED products have gradually become the development direction of future display technology due to their excellent functions such as wide color gamut, wide viewing angle, thinness, lightness, low energy consumption, high contrast, and flexibility. [0003] Since the OLED display product is a voltage-controlled current brightness display method, the brightness is not only related to the display voltage, but also related to the mobility K and the threshold voltage Vth of the driving TFT. During the process of OLED Panel light emission, the temperature will rise, and the temperature will decrease the K and Vth of the TFT, which will cause the driving current on the driving TFT to be unstable, resulting in a decrease in picture quality, and improving the picture di...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/041G09G3/3233G09G2320/0233G09G3/3241G09G3/3275
Inventor 杨飞陈燚韦晓龙
Owner BOE TECH GRP CO LTD
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