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Pixel circuit, driving method and display device

A technology of pixel circuit and driving voltage, applied in static indicators, instruments, etc., can solve the problem of uneven display brightness of the display panel, and achieve the effect of improving the uniformity of display brightness

Active Publication Date: 2014-09-03
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a pixel circuit, a driving method thereof, and a display device, which are used to solve the problem of uneven display brightness of a display panel caused by a decrease in brightness of a light-emitting device as the usage time increases

Method used

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  • Pixel circuit, driving method and display device
  • Pixel circuit, driving method and display device
  • Pixel circuit, driving method and display device

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Embodiment Construction

[0046]The specific implementations of the pixel circuit provided by the embodiments of the present invention, its driving method and the display device will be described in detail below with reference to the accompanying drawings.

[0047] A pixel circuit provided by an embodiment of the present invention, such as figure 2 As shown, it includes a light emitting device 01 and a driving module 02 for providing a driving voltage for the light emitting device, and also includes: a sampling module 03, a compensation module 04, and a processing module 05; wherein,

[0048] The input terminal of the sampling module 03 is connected to the output terminal of the driving module 02, and the sampling module 03 is used to sample the driving voltage provided by the driving module 02;

[0049] The input end of the processing module 05 is connected to the output end of the sampling module 03, and the processing module 05 is used to determine and drive the The compensation voltage correspond...

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Abstract

The invention discloses a pixel circuit, its driving method and a display device. In the pixel circuit provided by the embodiment of the invention, when a driver module provides driving voltage for a luminescent device, a sampling module samples the driving voltage; a processing module processes according to the driving voltage sampled by the sampling module and correspondence between pre-stored luminance of the luminescent device changing with the service time and the driving voltage so as to obtain compensation voltage corresponding to the driving voltage; a compensation module inputs the compensation voltage determined by the processing module into the corresponding luminescent device. Thus, the function of differently compensating the driving voltage of the luminescent device according to different service times of the luminescent device; the problem that display brightness of a display panel is not uniform because brightness of the luminescent device is reduced when the same driving voltage is adopted to drive the luminescent device with increasing of the service time of the luminescent device is solved; and display brightness uniformity of the display panel is raised.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, its driving method and a display device. Background technique [0002] At present, in the existing organic electroluminescent display device (OLED, Organic Light Emitting Diode), the luminance of the OLED device is proportional to the driving current, and has an exponential relationship with the driving voltage; in the state of low grayscale display, The driving voltage of the OLED device has a very obvious influence on the change of its luminance. The electrical performance of the OLED device decays with the increase of the use time, and the voltage drop of the OLED device will increase during use, that is, as the use time increases, the OLED device's The brightness will be reduced, making the display brightness uneven, thereby affecting the display effect of the entire image. Moreover, OLED devices are current-driven and require a stable current to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3258
CPCG09G3/32
Inventor 王颖
Owner BOE TECH GRP CO LTD
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