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1. WO2020113757 - OVER-CURRENT PROTECTION CIRCUIT, BACKLIGHT MODULE AND DISPLAY DEVICE

Publication Number WO/2020/113757
Publication Date 11.06.2020
International Application No. PCT/CN2019/070506
International Filing Date 04.01.2019
IPC
H02H 3/08 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
08responsive to excess current
H02M 3/156 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
3Conversion of dc power input into dc power output
02without intermediate conversion into ac
04by static converters
10using discharge tubes with control electrode or semiconductor devices with control electrode
145using devices of a triode or transistor type requiring continuous application of a control signal
155using semiconductor devices only
156with automatic control of output voltage or current, e.g. switching regulators
CPC
G09G 2330/04
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2330Aspects of power supply; Aspects of display protection and defect management
04Display protection
G09G 3/3406
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix ; no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
34by control of light from an independent source
3406Control of illumination source
H02H 3/08
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection
08responsive to excess current
Applicants
  • 深圳市华星光电半导体显示技术有限公司 SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD. [CN]/[CN]
Inventors
  • 杨勇 YANG, Yong
Agents
  • 深圳翼盛智成知识产权事务所(普通合伙) ESSEN PATENT & TRADEMARK AGENCY
Priority Data
201811494072.007.12.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) OVER-CURRENT PROTECTION CIRCUIT, BACKLIGHT MODULE AND DISPLAY DEVICE
(FR) CIRCUIT DE PROTECTION CONTRE LES SURINTENSITÉS, MODULE DE RÉTROÉCLAIRAGE, ET DISPOSITIF D'AFFICHAGE
(ZH) 过流保护电路、背光模组以及显示器
Abstract
(EN)
Provided are an over-current protection circuit, backlight module andadisplay device. The over-current protection circuit comprises a voltage boost circuit, a voltage control module and a sampling circuit. The sampling circuit generates a first control signal or a second control signal according to a detected inductive current of the voltage boost circuit. The first control signal is used to control disconnection of the sampling circuit, and to control normal operation of the voltage control module. The second control signal is used to control connection of the sampling circuit, and to control the voltage control module to stop operating.
(FR)
L'invention concerne un circuit de protection contre les surintensités, un module de rétroéclairage et un dispositif d'affichage. Le circuit de protection contre les surintensités comprend un circuit de survoltage, un module de réglage de tension et un circuit d'échantillonnage. Le circuit d'échantillonnage génère un premier signal de commande ou un second signal de commande en fonction d'un courant inductif détecté du circuit de survoltage. Le premier signal de commande est utilisé pour commander la déconnexion du circuit d'échantillonnage, et pour commander le fonctionnement normal du module de réglage de tension. Le second signal de commande est utilisé pour commander la connexion du circuit d'échantillonnage, et pour commander le fonctionnement du module de réglage de tension.
(ZH)
本揭示提供了过流保护电路、背光模组以及显示器。过流保护电路包括升压电路、电压控制模组以及采样电路。采样电路根据检测到的升压电路的电感电流来产生第一控制信号或第二控制信号,第一控制信号用于控制采样电路断开及控制电压控制模组正常工作,第二控制信号用于控制采样电路导通及控制电压控制模组停止工作。
Also published as
Latest bibliographic data on file with the International Bureau