CONTROL CIRCUIT, LIGHT SOURCE DRIVING DEVICE AND DISPLAY EQUIPMENT

Title:

CONTROL CIRCUIT, LIGHT SOURCE DRIVING DEVICE AND DISPLAY EQUIPMENT

Document Type and Number:

WIPO Patent Application WO/2019/161714

Kind Code:

A1

Abstract:

A control circuit, a light source driving device and a display equipment, the control circuit comprising: a current source circuit (10) that is configured to generate a current signal having a magnitude that is positively correlated with the temperature of a region in which the control circuit is located; a conversion circuit (20) that is connected to the current source circuit (10) and configured to convert the current signal generated by the current source circuit (10) into a voltage signal; a first comparison circuit (30) that is connected to the conversion circuit (20) and configured to output a control signal (VPWM) used for controlling the brightness of a light source on the basis of the voltage signal received from the conversion circuit (20), wherein the magnitude of the control signal (VPWM) is negatively correlated with the temperature of the region in which the control circuit is located, and the brightness of the light source is positively correlated with the magnitude of the control signal (VPWM).

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Inventors:

HU YE (CN)
LU XIAOYING (CN)

Application Number:

PCT/CN2019/070463

Publication Date:

August 29, 2019

Filing Date:

January 04, 2019

Export Citation:

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Assignee:

BOE TECHNOLOGY GROUP CO LTD (CN)
FUZHOU BOE OPTOELECTRONICS TECH CO LTD (CN)

International Classes:

G09G3/36

Foreign References:

CN1747172A	2006-03-15
CN103606352A	2014-02-26
CN101505559A	2009-08-12
CN103179745A	2013-06-26
US20090201956A1	2009-08-13

Other References: