CN101389176B - 背光控制电路及其控制方法 - Google Patents
背光控制电路及其控制方法 Download PDFInfo
- Publication number
- CN101389176B CN101389176B CN2007100771061A CN200710077106A CN101389176B CN 101389176 B CN101389176 B CN 101389176B CN 2007100771061 A CN2007100771061 A CN 2007100771061A CN 200710077106 A CN200710077106 A CN 200710077106A CN 101389176 B CN101389176 B CN 101389176B
- Authority
- CN
- China
- Prior art keywords
- pulse signals
- duty ratio
- control circuit
- brightness
- frequency
- 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.)
- Expired - Fee Related
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Classifications
-
- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
-
- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
- H05B41/2828—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage using control circuits for the switching elements
Abstract
Description
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007100771061A CN101389176B (zh) | 2007-09-14 | 2007-09-14 | 背光控制电路及其控制方法 |
US12/283,824 US7969101B2 (en) | 2007-09-14 | 2008-09-15 | Backlight control circuit having a duty ratio determining unit and method for controlling lighting of a lamp using same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007100771061A CN101389176B (zh) | 2007-09-14 | 2007-09-14 | 背光控制电路及其控制方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101389176A CN101389176A (zh) | 2009-03-18 |
CN101389176B true CN101389176B (zh) | 2012-05-30 |
Family
ID=40453735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2007100771061A Expired - Fee Related CN101389176B (zh) | 2007-09-14 | 2007-09-14 | 背光控制电路及其控制方法 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7969101B2 (zh) |
CN (1) | CN101389176B (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4951096B2 (ja) * | 2010-07-07 | 2012-06-13 | シャープ株式会社 | 液晶表示装置 |
JP5616768B2 (ja) | 2010-12-08 | 2014-10-29 | ローム株式会社 | 発光素子の駆動回路、それを用いた発光装置および電子機器 |
CN103957627B (zh) * | 2014-04-21 | 2016-07-06 | 四川长虹电器股份有限公司 | 控制指示灯亮度的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1249655A (zh) * | 1998-09-29 | 2000-04-05 | 株式会社村田制作所 | 压电变压器逆变器 |
CN1440230A (zh) * | 2003-03-25 | 2003-09-03 | 浙江大学 | 一种调光型高强度气体放电灯电子镇流器 |
US7145295B1 (en) * | 2005-07-24 | 2006-12-05 | Aimtron Technology Corp. | Dimming control circuit for light-emitting diodes |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5907742A (en) | 1997-03-09 | 1999-05-25 | Hewlett-Packard Company | Lamp control scheme for rapid warmup of fluorescent lamp in office equipment |
CN1607614A (zh) | 2003-10-16 | 2005-04-20 | 栢怡国际股份有限公司 | 多灯管驱动电路的变压器及多灯管驱动电路 |
TW200838107A (en) * | 2007-03-08 | 2008-09-16 | Delta Electronics Inc | Isolated DC/DC and DC/AC converters and controlling methods thereof having relatively better effectiveness |
-
2007
- 2007-09-14 CN CN2007100771061A patent/CN101389176B/zh not_active Expired - Fee Related
-
2008
- 2008-09-15 US US12/283,824 patent/US7969101B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1249655A (zh) * | 1998-09-29 | 2000-04-05 | 株式会社村田制作所 | 压电变压器逆变器 |
CN1440230A (zh) * | 2003-03-25 | 2003-09-03 | 浙江大学 | 一种调光型高强度气体放电灯电子镇流器 |
US7145295B1 (en) * | 2005-07-24 | 2006-12-05 | Aimtron Technology Corp. | Dimming control circuit for light-emitting diodes |
Also Published As
Publication number | Publication date |
---|---|
US7969101B2 (en) | 2011-06-28 |
US20090072748A1 (en) | 2009-03-19 |
CN101389176A (zh) | 2009-03-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
ASS | Succession or assignment of patent right |
Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: INNOLUX DISPLAY CO., LTD. Effective date: 20120227 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20120227 Address after: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant after: Chimei Optoelectronics Co., Ltd. Address before: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant before: Innolux Display Group |
|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20200914 |
|
CF01 | Termination of patent right due to non-payment of annual fee |