OLED-based sensing circuit and sensing method

A sensing circuit and detection circuit technology, applied in the direction of instruments, static indicators, etc., can solve the problems of uneven display screen, open voltage offset, etc., and achieve the effect of convenient compensation and quality assurance

Active Publication Date: 2017-02-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as the turn-on time of the OLED changes, the turn-on voltage of the thin-film transistor that drives the organic light-emitting diode to emit light will shift, resulting in unevenness of the display screen.

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  • OLED-based sensing circuit and sensing method

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0026] figure 1 is a schematic circuit diagram of an OLED-based sensing circuit according to an embodiment of the present invention. Such as figure 1 As shown, the circuit includes a pixel module 10 and a detection module 20 .

[0027] Wherein, the pixel module 10 includes a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a first capacitor C1, a second capacitor C2, and an organic light emitting diode D1. Th...

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Abstract

The invention discloses an OLED-based sensing circuit and sensing method. The method comprises: a switch is turned on to enable a voltage of a second common node to rise and a detection circuit is used for detecting a voltage at a first time during the voltage rising period of the second common node; according to the voltage at the first time, a voltage of the second common node at the second time during the voltage rising period is estimated by using an equivalent RC circuit corresponding to a pixel module, wherein the second time is longer than the first time; and on the basis of the voltage at the second time, a starting voltage of a second thin-film transistor is obtained. Therefore, the starting voltage of the thin-film transistor for driving an organic light-emitting diode can be sensed rapidly, thereby carrying out real-time compensation on the starting voltage in an offset mode conveniently and thus guaranteeing the quality of an OLED display picture.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to an OLED-based sensing circuit and sensing method. Background technique [0002] Organic Light Emitting Display (OLED) display, which is thinner and lighter, actively emits light without backlight, has no viewing angle problem, high definition, high brightness, fast response, low energy consumption, wide operating temperature range, and shock resistance The characteristics of strong ability and flexible display can make OLED display become the development focus of the display industry. [0003] However, as the turn-on time of the OLED changes, the turn-on voltage of the thin-film transistor driving the organic light-emitting diode to emit light will shift, resulting in unevenness of the display screen. [0004] Therefore, how to quickly sense the turn-on voltage of the thin film transistor driving the organic light-emitting diode so as to facilitate real-time compensation fo...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G09G3/00G09G3/3208
CPCG09G3/006G09G3/3208
Inventor梁鹏飞黄泰钧
OwnerTCL CHINA STAR OPTOELECTRONICS TECH CO LTD