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Pixel circuit and driving method thereof, organic electroluminescent display panel, and display apparatus

A pixel circuit and drive control technology, applied in the field of organic electroluminescent display panels and display devices, can solve problems such as inaccurate threshold voltage writing, achieve the effect of optimizing compensation and ensuring accuracy

Active Publication Date: 2016-03-23
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides a pixel circuit, a driving method, an organic electroluminescent display panel, and a display device to solve the problem of inaccurate writing of the threshold voltage of the driving transistor in the prior art

Method used

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  • Pixel circuit and driving method thereof, organic electroluminescent display panel, and display apparatus

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Embodiment Construction

[0043] The specific implementation manners of the pixel circuit, the driving method, the organic electroluminescent display panel and the display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] A pixel circuit provided by an embodiment of the present invention, such as figure 2 As shown, it includes: a light emitting device D1, a driving control module 1, a reset control module 2, a charging control module 3, a writing control module 4 and a light emitting control module 5; wherein,

[0045] The first control terminal 2a and the second control terminal 2b of the reset control module 2 are respectively connected to the reset signal terminal RST, the input terminal 2c is connected to the first level signal terminal Ref1, and the first output terminal 2d is connected to the first node A. The two output terminals 2e are respectively connected to the output terminal 1e of the drivin...

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Abstract

The invention discloses a pixel circuit and a driving method thereof, an organic electroluminescent display panel, and a display apparatus. The pixel circuit comprises a luminescent device, a driving control module, a reset control module, a charge control module, a writing control module and a luminescence control module. The reset control module resets a first node and the luminescent device, the charge control module charges a second node through the luminescence control module and discharges the second node through the driving control module and the reset control module, the writing control module writes data signals into the second node, and the luminescence control module controls the driving control module to drive the luminescent device to emit light. Since the charge control module discharges the second node through the driving control module and the reset control module and the discharge path of the driving control module does not go past the luminescent device, the feature and the display life of the luminescent device are not affected, it can also be ensured that threshold voltages of the driving control module are accurately written, and the compensation effect is optimized.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit, a driving method, an organic electroluminescent display panel and a display device. Background technique [0002] Organic Electroluminescent Display (OLED) is one of the hot spots in the field of flat panel displays today. Compared with Liquid Crystal Display (LCD), OLED has low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed, etc. advantage. [0003] Unlike LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. Due to the process and device aging, the threshold voltage V of the driving transistor in the pixel circuit of the OLED th There is inhomogeneity, so that the current flowing through each pixel OLED will change, which will lead to uneven display brightness, and then affect the display effect of the entire image. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G3/3233G09G2300/0814G09G2300/0819G09G2300/0842G09G2300/0861G09G2300/0866G09G2320/045G09G3/3258H10K50/125H10K50/805
Inventor 马占洁
Owner BOE TECH GRP CO LTD
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