OLED pixel circuit compensation method

A pixel circuit and voltage technology, which is applied in the field of compensating organic light emitting diode pixel circuits, can solve the problems of uneven display brightness and easy drift, etc., and achieve the effect of improving yield and compensating mobility

Active Publication Date: 2018-11-13
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The threshold voltage (Vth) of the drive transistor is prone to drift, especially the threshold voltage drift of the drive transistor made of oxide material is greater, which causes the current flowing through the organic light-emitting diode to change, resulting in uneven display brightness

Method used

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  • OLED pixel circuit compensation method
  • OLED pixel circuit compensation method
  • OLED pixel circuit compensation method

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts also fall within the protection scope of the present invention.

[0025] Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the inventive subject matter belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the ...

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Abstract

The embodiment of the invention provides an OLED pixel circuit compensation method comprising the following steps: using a first compensation mode that contains internal voltage compensation to compensate a driving transistor in an OLED pixel circuit in a luminescent device working period in the OLED pixel circuit; using a second compensation mode that contains internal voltage compensation and external voltage compensation to compensate the driving transistor in a luminescent device non-working period. The method can compensate threshold-voltage drift of the driving transistor, thus improvingthe OLED pixel circuit yield rate, preventing the external voltage compensation retardation effect, and accelerating a sensing charging rate in the external voltage compensation.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a method for compensating an organic light emitting diode (Organic Light Emitting Diode, OLED for short) pixel circuit. Background technique [0002] In recent years, an Active-Matrix Organic Light Emitting Diode (AMOLED for short) display device has gradually become one of the hot spots in the field of display technology today. Compared with traditional liquid crystal displays, AMOLED display devices have the characteristics of ultra-high contrast, ultra-thin thickness, ultra-wide color gamut, good viewing experience with large viewing angle and ultra-fast response speed, so AMOLED display devices will occupy more in the future. market share. [0003] An AMOLED display device includes an organic light emitting diode array substrate. The organic light emitting diode array substrate includes organic light emitting diodes and driving transistors for driving the organic l...

Claims

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Application Information

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IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G2300/043G09G2310/0243G09G3/3233G09G2320/0295G09G2230/00G09G2310/06G09G2300/0819G09G2320/045G09G2300/0417G09G2310/0262G09G2300/0842G09G3/3258
Inventor 林奕呈闫光李全虎朱明毅
Owner BOE TECH GRP CO LTD
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