KR100633474B1 - 엘씨디 백라이트용 인버터의 보호회로 - Google Patents
엘씨디 백라이트용 인버터의 보호회로 Download PDFInfo
- Publication number
- KR100633474B1 KR100633474B1 KR1020000061965A KR20000061965A KR100633474B1 KR 100633474 B1 KR100633474 B1 KR 100633474B1 KR 1020000061965 A KR1020000061965 A KR 1020000061965A KR 20000061965 A KR20000061965 A KR 20000061965A KR 100633474 B1 KR100633474 B1 KR 100633474B1
- Authority
- KR
- South Korea
- Prior art keywords
- voltage
- control
- inverter
- diode
- lcd
- Prior art date
Links
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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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
- H05B41/26—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
- H05B41/2821—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 single-switch converter or a parallel push-pull converter in the final stage
- H05B41/2822—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 single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
-
- 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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims (2)
- 시스템에 필요한 전압을 공급하는 전원 공급부와, 상기 전원 공급부를 통해 입력되는 전압에 따라 이에 대응되는 소정의 주파수를 생성하는 제어 IC와, 상기 제어 IC를 통해 입력되는 직류 전압을 교류 전압으로 변환시키고, 상기 교류 전압중 고주파 신호를 제거한 후, 이 신호에 따라 교류 고전압을 발생시키는 구동부와, 상기 구동부에서 출력되는 교류 고전압에 의해 점등되는 엘씨디 램프와, 상기 엘씨디 램프를 흐르는 관전류를 센싱하여 직류 전압으로 변환시켜 제어 IC에 입력되는 귀환부로 구성되는 인버터에 있어서,상기 엘씨디 램프와 상기 제어 IC 사이에 상기 엘씨디 램프를 통해 인가되는 교류전압의 크기에 따라 스위칭되어 선택적으로 상기 전원 공급부의 전압을 출력하는 AC 신호 검출부와,상기 AC 회로 검출부로부터 출력되는 전압과, 외부로부터 입력되는 디밍 전압을 가산하여 출력하는 가산기를 포함하는 것을 특징으로 하는 엘씨디 백라이트용 인버터의 보호회로.
- 제 1항에 있어서,상기 AC 신호 검출부는,상기 엘씨디 램프 출력단에 캐소드와 애노드가 순차적으로 연결되는 제 1다이오드와,상기 제 1다이오드의 애노드의 후단에 이미터와 컬렉터가 순차적으로 연결되고 베이스가 그라운드에 접지되는 트랜지스터와,상기 가산기의 일단에 캐소드와 애노드가 순차적으로 연결되는 제 2다이오드 및 제 3다이오드를 포함하며,상기 제 2다이오드의 애노드와 상기 제 3다이오드의 캐소드 사이의 노드에 상기 트랜지스터의 컬렉터가 연결되는 것을 특징으로 하는 엘씨디 백라이트용 인버터의 보호회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020000061965A KR100633474B1 (ko) | 2000-10-20 | 2000-10-20 | 엘씨디 백라이트용 인버터의 보호회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020000061965A KR100633474B1 (ko) | 2000-10-20 | 2000-10-20 | 엘씨디 백라이트용 인버터의 보호회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20020031476A KR20020031476A (ko) | 2002-05-02 |
KR100633474B1 true KR100633474B1 (ko) | 2006-10-16 |
Family
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Application Number | Title | Priority Date | Filing Date |
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KR1020000061965A KR100633474B1 (ko) | 2000-10-20 | 2000-10-20 | 엘씨디 백라이트용 인버터의 보호회로 |
Country Status (1)
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KR (1) | KR100633474B1 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100393557B1 (ko) * | 2001-05-25 | 2003-08-02 | 삼성전기주식회사 | 엘시디 백라이트 인버터 |
KR100431058B1 (ko) * | 2001-12-26 | 2004-05-10 | 삼성전기주식회사 | 압전 트랜스포머를 이용한 dc/dc 인버터 |
KR100483046B1 (ko) * | 2002-11-26 | 2005-04-15 | 삼성전기주식회사 | 셧다운 안정화 기능을 개선한 백라이트 인버터 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200193174Y1 (ko) * | 2000-03-14 | 2000-08-16 | 엘지전자주식회사 | 엘씨디 백라이트용 인버터 보호장치 |
KR20010076724A (ko) * | 2000-01-27 | 2001-08-16 | 구자홍 | 엘씨디 백라이트용 인버터 보호장치 |
KR20010108645A (ko) * | 2000-05-30 | 2001-12-08 | 송재인 | 엘씨디 백라이트용 인버터의 보호회로 |
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- 2000-10-20 KR KR1020000061965A patent/KR100633474B1/ko not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20010076724A (ko) * | 2000-01-27 | 2001-08-16 | 구자홍 | 엘씨디 백라이트용 인버터 보호장치 |
KR200193174Y1 (ko) * | 2000-03-14 | 2000-08-16 | 엘지전자주식회사 | 엘씨디 백라이트용 인버터 보호장치 |
KR20010108645A (ko) * | 2000-05-30 | 2001-12-08 | 송재인 | 엘씨디 백라이트용 인버터의 보호회로 |
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KR20020031476A (ko) | 2002-05-02 |
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