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Compensation circuit for liquid crystal display device and organic light emitting diode

A technology of light-emitting diodes and compensation circuits, applied in static indicators, instruments, etc., can solve the problems of OLED current not meeting requirements, threshold voltage drift, threshold voltage drift of driving thin film transistors, etc.

Active Publication Date: 2018-05-11
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, during the use of thin film transistors, the threshold voltage of the driving thin film transistor will drift, such as the light in the oxide semiconductor, the stress of the source and drain electrodes and other factors, so that the threshold voltage of the driving thin film transistor will drift, and then The current through the OLED does not reach the required current

Method used

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  • Compensation circuit for liquid crystal display device and organic light emitting diode
  • Compensation circuit for liquid crystal display device and organic light emitting diode
  • Compensation circuit for liquid crystal display device and organic light emitting diode

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] See figure 1 as shown, figure 1 It is a circuit diagram of the compensation circuit of the organic light emitting diode according to the first embodiment of the present invention. The compensation circuit disclosed in this embodiment is applied to organic light emitting diodes, such as figure 1 As shown, the compensation circuit is coupled to the organic light emitting diode, and the compensation circuit at least includes: a first swit...

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Abstract

The invention discloses a liquid crystal display device and a compensation circuit of an organic light-emitting diode thereof. The compensation circuit at least includes: a first switch unit, a second switch unit, a third switch unit and a fourth switch unit, when the first switch unit is closed and the second switch unit, the third switch unit and the fourth switch unit are opened, The compensation circuit drives the organic light emitting diode to emit light, and then compensates the organic light emitting diode. Through the above method, the present invention can prevent the current passing through the organic light emitting diode from being affected by the threshold voltage drift of the thin film transistor.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display device and a compensation circuit of an organic light emitting diode. Background technique [0002] An organic light-emitting diode (Organic Light-Emitting Diode, OLED) is a current light-emitting device. The driving circuit of the existing OLED includes two thin film transistors and a capacitor. The two thin film transistors include a switching thin film transistor and a driving thin film transistor. The switching thin film transistor is used to control the entry of data signals, and the driving thin film transistor is used to control the current passing through the OLED. With the same data signal, a positive or negative shift in the threshold voltage of the driving thin film transistor results in a different current through the OLED. [0003] At present, during the use of thin film transistors, the threshold voltage of the driving thin f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/3233
CPCG09G3/3233G09G3/3406G09G2300/0814G09G2300/0819G09G2300/0842G09G2320/0233G09G2320/045G09G3/34G09G2300/0866
Inventor 聂诚磊
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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