CN107533827A - 背光电路、电子设备及背光调节方法 - Google Patents

背光电路、电子设备及背光调节方法 Download PDF

Info

Publication number
CN107533827A
CN107533827A CN201580071170.1A CN201580071170A CN107533827A CN 107533827 A CN107533827 A CN 107533827A CN 201580071170 A CN201580071170 A CN 201580071170A CN 107533827 A CN107533827 A CN 107533827A
Authority
CN
China
Prior art keywords
resistance
branch
backlight
duty cycle
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201580071170.1A
Other languages
English (en)
Other versions
CN107533827B (zh
Inventor
帅俊卿
张浩靖
褚建飞
王石磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honor Device Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of CN107533827A publication Critical patent/CN107533827A/zh
Application granted granted Critical
Publication of CN107533827B publication Critical patent/CN107533827B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for 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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for 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 by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for 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 by control of light from an independent source using liquid crystals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种背光电路、电子设备及背光调节方法，涉及液晶显示领域，所述背光电路包括：背光电源芯片(260)和可调电阻电路(270)；背光电源芯片(260)包括用于设置参考电流的设置引脚(ISET)、输入引脚(IN)和输出引脚(OUT)；可调电阻电路(270)的一端与所述设置引脚(ISET)相连；可调电阻电路(270)还包括：控制端(C1)，控制端(C1)用于接收切换信号，根据切换信号将与设置引脚(ISET)相连的电阻支路从第一电阻支路(272)切换为第二电阻支路(274)；背光电源芯片(260)，用于以参考电流为基准，根据输入引脚(IN)接收到的PWM信号的占空比生成驱动电流；通过输出引脚(OUT)输出驱动电流。通过不同电阻支路改变背光电源中的参考电流，从而实现在更大的电流值调节范围内输出驱动电流，使得背光强度达到更低亮度或更高亮度。

Description

PCT国内申请，说明书已公开。

Claims (13)

  1. PCT国内申请，权利要求书已公开。
CN201580071170.1A 2015-12-09 2015-12-09 背光电路、电子设备及背光调节方法 Active CN107533827B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/096869 WO2017096567A1 (zh) 2015-12-09 2015-12-09 背光电路、电子设备及背光调节方法

Publications (2)

Publication Number Publication Date
CN107533827A true CN107533827A (zh) 2018-01-02
CN107533827B CN107533827B (zh) 2020-04-28

Family

ID=59012580

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580071170.1A Active CN107533827B (zh) 2015-12-09 2015-12-09 背光电路、电子设备及背光调节方法

Country Status (6)

Country Link
US (1) US10499472B2 (zh)
EP (1) EP3376493B8 (zh)
JP (1) JP6606288B2 (zh)
KR (1) KR102115873B1 (zh)
CN (1) CN107533827B (zh)
WO (1) WO2017096567A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109285510A (zh) * 2018-09-11 2019-01-29 重庆惠科金渝光电科技有限公司 一种显示器、显示装置和接地电阻调节方法
CN109671401A (zh) * 2019-01-30 2019-04-23 上海灿瑞科技股份有限公司 一种具有屏闪功能的背光驱动芯片
CN113192465A (zh) * 2021-03-30 2021-07-30 智道网联科技(北京)有限公司 智能网联设备的显示屏背光电路及控制方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110636670B (zh) * 2019-09-20 2022-07-19 开发晶照明（厦门）有限公司 光源装置
CN111223457B (zh) * 2019-11-06 2023-06-30 昆山龙腾光电股份有限公司 背光驱动电路与显示装置
CN111586313A (zh) * 2020-06-17 2020-08-25 杭州海康威视数字技术股份有限公司 用于摄像机补光的控制电路和摄像机
KR20230071561A (ko) * 2021-11-16 2023-05-23 삼성전자주식회사 디스플레이 장치 및 디스플레이 장치의 제어 방법

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007294341A (ja) * 2006-04-27 2007-11-08 Alpine Electronics Inc バックライト制御回路
CN201893106U (zh) * 2010-11-17 2011-07-06 苏州冠捷科技有限公司 一种led背光源的驱动控制电路
US8288969B2 (en) * 2009-09-16 2012-10-16 Novatek Microelectronics Corp. Driving apparatus of light emitting diode and driving method thereof
CN103426406A (zh) * 2012-05-24 2013-12-04 鸿富锦精密工业（深圳）有限公司 显示器
CN103680444A (zh) * 2013-12-06 2014-03-26 深圳市华星光电技术有限公司 Led升压转换器及应用其的背光源led驱动装置
CN104006324A (zh) * 2013-02-25 2014-08-27 京东方科技集团股份有限公司 一种背光模组以及包含该背光模组的显示装置
CN203950537U (zh) * 2014-07-17 2014-11-19 江苏迈特菲光电技术有限公司 一种led背光源的驱动控制电路
CN104488020A (zh) * 2012-07-24 2015-04-01 夏普株式会社 显示装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100806903B1 (ko) * 2001-09-27 2008-02-22 삼성전자주식회사 액정 표시 장치 및 이의 구동 방법
KR100735480B1 (ko) 2005-06-30 2007-07-03 삼성전기주식회사 정전류 제어기능을 갖는 백라이트용 ｌｅｄ 구동회로
JP4046752B2 (ja) * 2006-05-09 2008-02-13 シャープ株式会社 電源回路装置及びこの電源回路装置を備えた電子機器
US7696964B2 (en) * 2006-06-09 2010-04-13 Philips Lumileds Lighting Company, Llc LED backlight for LCD with color uniformity recalibration over lifetime
KR20080017191A (ko) * 2006-08-21 2008-02-26 엘지전자 주식회사 백 라이트의 밝기 조절 회로
JP2009044081A (ja) 2007-08-10 2009-02-26 Rohm Co Ltd 駆動装置
TWI516167B (zh) * 2010-03-09 2016-01-01 群創光電股份有限公司 驅動裝置、發光二極體驅動裝置及其驅動方法
KR20120020843A (ko) * 2010-08-31 2012-03-08 삼성전자주식회사 디스플레이장치 및 이에 구비된 백라이트를 구동하는 구동회로장치
US8537099B2 (en) * 2010-09-08 2013-09-17 Synaptics Incorporated Dynamic voltage supply for LCD timing controller
CN102404440B (zh) 2010-09-17 2014-01-15 联芯科技有限公司 自动调节背光亮度的方法及装置
JP2012119069A (ja) 2010-11-29 2012-06-21 Funai Electric Co Ltd ＬＥＤ（ＬｉｇｈｔＥｍｉｔｔｉｎｇＤｉｏｄｅ）点灯回路および液晶表示装置
KR20130102406A (ko) * 2012-03-07 2013-09-17 삼성디스플레이 주식회사 백라이트 유닛 및 이를 갖는 표시장치
CN102855849B (zh) 2012-09-20 2015-05-06 青岛海信电器股份有限公司 一种液晶背光驱动电流控制装置
CN103945590B (zh) 2013-01-18 2016-07-13 瀚宇彩晶股份有限公司 发光二极管模块及其驱动方法
KR102116367B1 (ko) * 2013-09-03 2020-06-05 삼성전자주식회사 디스플레이장치, 광원 구동장치 및 그 구동방법
JP6448283B2 (ja) * 2014-02-24 2019-01-09 アルパイン株式会社 表示装置および表示制御方法
US9699836B2 (en) * 2014-06-18 2017-07-04 Farhad Bahrehmand Multifunctional universal LED driver
CN104299603B (zh) 2014-10-24 2018-03-27 京东方科技集团股份有限公司 亮度调节装置、方法、led背光装置和液晶显示装置
US9741956B2 (en) * 2014-11-25 2017-08-22 Industrial Technology Research Institute Organic light-emitting diode apparatus
CN104505034B (zh) 2014-12-18 2017-04-19 深圳市华星光电技术有限公司 液晶显示装置、背光模块及其背光源驱动电路

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007294341A (ja) * 2006-04-27 2007-11-08 Alpine Electronics Inc バックライト制御回路
US8288969B2 (en) * 2009-09-16 2012-10-16 Novatek Microelectronics Corp. Driving apparatus of light emitting diode and driving method thereof
CN201893106U (zh) * 2010-11-17 2011-07-06 苏州冠捷科技有限公司 一种led背光源的驱动控制电路
CN103426406A (zh) * 2012-05-24 2013-12-04 鸿富锦精密工业（深圳）有限公司 显示器
CN104488020A (zh) * 2012-07-24 2015-04-01 夏普株式会社 显示装置
CN104006324A (zh) * 2013-02-25 2014-08-27 京东方科技集团股份有限公司 一种背光模组以及包含该背光模组的显示装置
CN103680444A (zh) * 2013-12-06 2014-03-26 深圳市华星光电技术有限公司 Led升压转换器及应用其的背光源led驱动装置
CN203950537U (zh) * 2014-07-17 2014-11-19 江苏迈特菲光电技术有限公司 一种led背光源的驱动控制电路

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109285510A (zh) * 2018-09-11 2019-01-29 重庆惠科金渝光电科技有限公司 一种显示器、显示装置和接地电阻调节方法
CN109285510B (zh) * 2018-09-11 2021-04-02 重庆惠科金渝光电科技有限公司 一种显示器、显示装置和接地电阻调节方法
CN109671401A (zh) * 2019-01-30 2019-04-23 上海灿瑞科技股份有限公司 一种具有屏闪功能的背光驱动芯片
CN109671401B (zh) * 2019-01-30 2023-10-27 上海灿瑞科技股份有限公司 一种具有屏闪功能的背光驱动芯片
CN113192465A (zh) * 2021-03-30 2021-07-30 智道网联科技(北京)有限公司 智能网联设备的显示屏背光电路及控制方法

Also Published As

Publication number Publication date
WO2017096567A1 (zh) 2017-06-15
JP2019501495A (ja) 2019-01-17
JP6606288B2 (ja) 2019-11-13
EP3376493A4 (en) 2018-11-07
CN107533827B (zh) 2020-04-28
EP3376493B1 (en) 2021-05-05
KR102115873B1 (ko) 2020-05-27
US10499472B2 (en) 2019-12-03
KR20180090364A (ko) 2018-08-10
US20180368220A1 (en) 2018-12-20
EP3376493A1 (en) 2018-09-19
EP3376493B8 (en) 2021-06-30

Similar Documents

Publication Publication Date Title
CN107533827A (zh) 背光电路、电子设备及背光调节方法
KR102298224B1 (ko) 백라이트 유닛 및 백라이트 유닛을 포함하는 표시 장치
CN101256308B (zh) 背光单元、具有该背光单元的液晶显示装置及其控制方法
JP4707315B2 (ja) 回路装置
CN102498507B (zh) 液晶显示装置
US8988010B2 (en) LED driving device and lighting device
CN105825834B (zh) 终端及其背光亮度调节方法
JP5977250B2 (ja) 複数のｌｅｄを有する照明システム
US20060033456A1 (en) Flashing light control apparatus and method thereof
CN104080245A (zh) 控制信号生成装置和音频信号处理装置
JP2011061177A (ja) 発光ダイオードの特性を模擬可能な電子負荷とその模擬方法
US7986100B2 (en) LED string
CN106804081A (zh) 调光电路与调光控制方法
US20170041992A1 (en) Light source driving device and dimming/toning control method
CN210443247U (zh) Led驱动电路及液晶显示装置
CN112612992A (zh) 色温优化方法、装置、终端设备及存储介质
US9204515B2 (en) Light source module, light source module driving circuit and driving method
CN106369294A (zh) 一种可视诱鱼探鱼一体系统
EP1656001A1 (en) Flashing lights control apparatus and method thereof
JP6351800B2 (ja) Ｌｅｄ調光回路
CN104049930B (zh) 亮度调节电路
US9578703B2 (en) Systems and methods for continuous adjustment of reference signal to control chip
CN204272469U (zh) 一种发光装置
CN107295281B (zh) 显示设备及控制方法
CN105163468A (zh) 一种分布式无线灯光控制系统及其应用方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210420

Address after: Unit 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong 518040

Patentee after: Honor Device Co.,Ltd.

Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen

Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd.