Pixel compensation circuit, driving method thereof and display device

A technology for compensating circuits and pixels, used in static indicators, instruments, etc., to solve problems such as uneven display brightness, current difference, and uneven brightness

Active Publication Date: 2017-12-22
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to reasons such as process technology and device aging, the threshold voltage V of the drive transistor that drives the OLED to emit light will th There is inhomogeneity, which causes the current flowing through each OLED to change, making the display brightness uneven, which affects the display effect of the entire image
And because the current flowing through each OLED is related to the power supply voltage connected to the source of the driving transistor, due to IRDrop, the current difference in different regions will also be caused, which will cause uneven brightness of OLEDs in different regions.

Method used

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

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Embodiment Construction

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the specific implementations of the pixel compensation circuit, its driving method and display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0039] To avoid driving the transistor threshold voltage V th The impact on the brightness of OLED, OLED displays generally use compensation V th The pixel compensation circuit is used to drive the OLED to emit light. However, in order to realize the function of initializing and writing the data voltage, the pixel compensation circ...

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Abstract

The present invention discloses a pixel compensation circuit, a driving method thereof and a display device. The pixel compensation circuit comprises an initialization module, a data writing data, a threshold value compensation module, a voltage input module, a storage voltage division module, a driving transistor and a light-emitting device, wherein by the mutual cooperation of the above five modules and the driving transistor, a driving current that the driving transistor drives the light-emitting device to emit light is irrelevant with a threshold voltage of the driving transistor and the voltage of a first power supply end, and the influence of the threshold voltage of the driving transistor and the IR Drop on the driving current of the light-emitting device can be avoided, so that the driving current can keep stable, and further the uniformity of the picture brightness of a display area in the display device can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel compensation circuit, a driving method thereof and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) display is one of the hot spots in the field of display research today. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, low production cost, self-illumination, and wide viewing angle. and quick response. At present, OLED displays have begun to replace traditional LCD displays in display fields such as mobile phones, tablet computers, and digital cameras. [0003] Unlike LCD displays that use a stable voltage to control brightness, OLEDs are current-driven and require a stable current to control their light emission. Due to reasons such as process technology and device aging, the threshold voltage V of the drive transistor that drives the OLED to emit light will th There is inhomogeneity, which cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G3/3233G09G2300/0852G09G2300/0861G09G2310/0251G09G2310/0262G09G2320/043G09G2300/0819G09G3/3225G09G2320/0204G09G2320/045G09G2320/0233
Inventor 李祥远高玟虎姜尚勋高永益董婉俐
Owner BOE TECH GRP CO LTD
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