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Pixel circuit and driving method thereof, array substrate, display device

A technology for pixel circuits and array substrates, applied in the fields of pixel circuits and their driving methods, display devices, and array substrates, can solve problems affecting the service life of OLED devices, the service life of OLED display devices, OLED loss, etc., and achieve the purpose of suppressing the deterioration of picture quality and extending The service life and the effect of extending the luminous life

Active Publication Date: 2019-11-01
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, although increasing the driving voltage compared with the decrease in luminous efficiency can delay the deterioration of the picture quality of the OLED display device to a certain extent, a larger driving voltage will also cause greater loss to the OLED and seriously affect the OLED device. Lifespan and service life of OLED display devices

Method used

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  • Pixel circuit and driving method thereof, array substrate, display device
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  • Pixel circuit and driving method thereof, array substrate, display device

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, not all, embodiments of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those having ordinary skill in the art to which the present invention belongs. As used herein, "first", "second" and similar words do not imply any order, quantity or importance, but are used only to distinguish different components. "Comprising" or similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, and do not exclude other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical co...

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Abstract

The invention discloses a pixel circuit, a driving method thereof, an array substrate, and a display device, belonging to the display field. The pixel circuit includes a light-emitting element, a driving unit, a scanning unit, and a carrier release unit; wherein the driving unit is connected to the first pole of the light-emitting element, and the driving unit is used to store a driving voltage and control the current passing through the light-emitting element according to the driving voltage The size of the scanning unit; the scanning unit is connected to the driving unit, and the scanning unit is used to update the driving voltage stored in the driving unit during the effective period of the first scanning signal; the carrier releasing unit is connected to the second pole of the light-emitting element, and the carrier releasing unit is used for The reverse bias voltage is provided to the second electrode of the light-emitting element during the active period of the second scan signal, and the active period of the second scan signal is configured before the active period of the first scan signal in each display cycle. The invention can delay the decline of the luminous efficiency of the organic light-emitting element with the use time, and prolong the service life of the OLED display device.

Description

technical field [0001] The present invention relates to the field of display, in particular to a pixel circuit, a driving method thereof, an array substrate, and a display device. Background technique [0002] Electroluminescence device is a kind of self-luminous display device, which has attracted wide attention due to its advantages such as wide viewing angle, high contrast ratio and high response speed. With the development of the field of electroluminescence, organic electroluminescent devices such as organic light emitting diode (Organic Light Emitting Diode, OLED) display devices can achieve more excellent brightness, power consumption, Response rate and color gamut have become one of the mainstream in the current display market. [0003] However, light-emitting elements such as OLEDs have a problem that their luminous efficiency gradually decreases with time. In some actual tests, after driving for 4000-5000 hours, the luminous efficiency of the OLED will drop to ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G3/3233G09G2300/0852G09G2300/0861G09G2310/0262G09G3/3258G09G2310/0267H10K50/15H10K50/16H10K50/171H10K50/805
Inventor 马俊才储浩
Owner BOE TECH GRP CO LTD
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