DE69709400T2 - Pulsbreitenmodulator mit sehr niedrigem tastverhältnis - Google Patents

Pulsbreitenmodulator mit sehr niedrigem tastverhältnis

Info

Publication number
DE69709400T2
DE69709400T2 DE69709400T DE69709400T DE69709400T2 DE 69709400 T2 DE69709400 T2 DE 69709400T2 DE 69709400 T DE69709400 T DE 69709400T DE 69709400 T DE69709400 T DE 69709400T DE 69709400 T2 DE69709400 T2 DE 69709400T2
Authority
DE
Germany
Prior art keywords
pulse width
duty ratio
width modulator
low duty
low
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 - Lifetime
Application number
DE69709400T
Other languages
English (en)
Other versions
DE69709400D1 (de
Inventor
R Praiswater
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Application granted granted Critical
Publication of DE69709400D1 publication Critical patent/DE69709400D1/de
Publication of DE69709400T2 publication Critical patent/DE69709400T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0606—Manual adjustment
    • 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
    • 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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
DE69709400T 1996-12-15 1997-10-09 Pulsbreitenmodulator mit sehr niedrigem tastverhältnis Expired - Lifetime DE69709400T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/760,548 US5838294A (en) 1996-12-15 1996-12-15 Very low duty cycle pulse width modulator
PCT/US1997/018395 WO1998027648A1 (en) 1996-12-15 1997-10-09 Very low duty cycle pulse width modulator

Publications (2)

Publication Number Publication Date
DE69709400D1 DE69709400D1 (de) 2002-01-31
DE69709400T2 true DE69709400T2 (de) 2002-08-22

Family

ID=25059439

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69709400T Expired - Lifetime DE69709400T2 (de) 1996-12-15 1997-10-09 Pulsbreitenmodulator mit sehr niedrigem tastverhältnis

Country Status (9)

Country Link
US (1) US5838294A (de)
EP (1) EP0944957B1 (de)
JP (1) JP2001507884A (de)
KR (1) KR100495760B1 (de)
AU (1) AU4900197A (de)
CA (1) CA2272276C (de)
DE (1) DE69709400T2 (de)
IL (1) IL130130A (de)
WO (1) WO1998027648A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3887093B2 (ja) * 1998-01-29 2007-02-28 株式会社 沖マイクロデザイン 表示装置
JP2001125547A (ja) * 1999-10-28 2001-05-11 Sony Corp 液晶表示装置及びその表示方法
JP3966683B2 (ja) * 2000-10-26 2007-08-29 株式会社アドバンスト・ディスプレイ 液晶表示装置
KR100825107B1 (ko) * 2002-07-19 2008-04-25 삼성전자주식회사 액정 표시 장치
US7205973B2 (en) * 2003-02-12 2007-04-17 Nvidia Corporation Gradual dimming of backlit displays
JP3968587B2 (ja) * 2004-03-30 2007-08-29 船井電機株式会社 液晶テレビジョン、バックライト制御装置およびバックライト制御方法
DE102004016073B4 (de) 2004-03-30 2010-12-23 Texas Instruments Deutschland Gmbh Verfahren zur Erzeugung eines Impulsausgangssignals aus einem periodischen Sägezahnsignal und einer Referenzspannung, und getakteter Stromwandler
US7573250B2 (en) * 2004-08-24 2009-08-11 International Rectifier Corporation Method and apparatus for calibrating a ramp signal
US7225090B2 (en) * 2005-10-28 2007-05-29 Agilent Technologies, Inc. Method for measuring capacitance and equivalent parallel resistance

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440566A (en) * 1966-02-10 1969-04-22 Gates Radio Co Pulse duration modulator having trigger circuit utilizing a modified triangular waveform
DE1588136B2 (de) * 1967-08-29 1970-11-12 Danfoss A/S, Nordborg (Dänemark) Schaltungsanordnung zum Erzeugen tfiner breite- und abstandsmodulierten Rechtetfkspannung
US4614415A (en) * 1973-06-04 1986-09-30 Hyatt Gilbert P Illumination signal processing system
CA1177111A (en) * 1982-02-17 1984-10-30 Carl Schweer Lamp dimmer
US4998045A (en) * 1988-12-06 1991-03-05 Honeywell Inc. Fluorescent lamp dimmer
US5184117A (en) * 1989-06-28 1993-02-02 Zenith Data Systems Corporation Fluorescent backlight flicker control in an LCD display
FR2649277B1 (fr) * 1989-06-30 1996-05-31 Thomson Csf Procede et dispositif de gradation de lumiere pour lampe fluorescente d'eclairage arriere d'ecran a cristaux liquides
US5027034A (en) * 1989-10-12 1991-06-25 Honeywell Inc. Alternating cathode florescent lamp dimmer
US5225742A (en) * 1991-12-11 1993-07-06 Delta Coventry Corporation Solid state ballast for high intensity discharge lamps
US5420481A (en) * 1993-09-27 1995-05-30 Smiths Industries Fluorescent lamp with wide range of luminous intensities
DE69413793T2 (de) * 1994-01-21 1999-04-15 St Microelectronics Srl Stromquelle
US5428265A (en) * 1994-02-28 1995-06-27 Honeywell, Inc. Processor controlled fluorescent lamp dimmer for aircraft liquid crystal display instruments
KR0154797B1 (ko) * 1995-07-27 1998-12-15 김광호 펄스 폭 변조 제어 회로

Also Published As

Publication number Publication date
DE69709400D1 (de) 2002-01-31
JP2001507884A (ja) 2001-06-12
KR100495760B1 (ko) 2005-06-17
EP0944957B1 (de) 2001-12-19
AU4900197A (en) 1998-07-15
US5838294A (en) 1998-11-17
CA2272276A1 (en) 1998-06-25
WO1998027648A1 (en) 1998-06-25
IL130130A0 (en) 2000-06-01
CA2272276C (en) 2005-02-08
KR20000069276A (ko) 2000-11-25
IL130130A (en) 2003-10-31
EP0944957A1 (de) 1999-09-29

Similar Documents

Publication Publication Date Title
DE69618745D1 (de) Pulsweitenmodulationssteuerung mit erhöhter Auflösung
DE69809870T2 (de) Delta-Sigma Pulsbreitenmodulator
DE69803511T2 (de) Delta-Sigma Pulsbreitenmodulator
DE19782124T1 (de) Laservorrichtung mit variabler Impulsbreite
FR2720186B1 (fr) Electroaimant à modulation de largeur d'impulsion.
DE19882650T1 (de) Kettentrieb-Übersetzung mit variablem Verhältnis
DE69737344D1 (de) Pulsbreitenregler
DE69815743D1 (de) Magnetische Codiervorrichtung mit Referenzimpuls
EP1012932A4 (de) Vorrichtung zur verringerung der linienbreite mit einem zweifach genutztem gitter
FI960569A0 (fi) Pulssileveysmoduloitu DC-DC tehomuuttaja
DE69515387D1 (de) Verriegelungseinrichtung mit einer Riegelfunktion
DE69418371T2 (de) Schaltung zur Pulsweitenmodulation
DE69616491T2 (de) Modulator mit individuell gesetzten Flanken
DE69617503T2 (de) Pulsbreitenmodulationsvorrichtung und ein dieselbe nutzendes System
DE69627428D1 (de) Pulsbreitenmodulator mit Schutzschaltung
DE69709400T2 (de) Pulsbreitenmodulator mit sehr niedrigem tastverhältnis
DE69835339D1 (de) Komponente mit scharfem Geschmack
EP0836769A4 (de) Bitweise rotierender pulsweitenmodulierter digital-analog-umsetzer
DE69942973D1 (de) Pulsbreitenmodulationssteuerung
DE69434163D1 (de) Pulsbreitenmodulationsverstärker
DE69811027T2 (de) Zirkulator mit konzentrierten Elementen
DE69829096D1 (de) Rahmenstruktur mit einer Mehrzahl von Modulationsarten
DE69802450D1 (de) Pulsbreitenmodulationsschaltung
DE69704378T2 (de) Umrichter mit pulsbreitenmodulation
DE59802732D1 (de) Pulsweitenmodulator

Legal Events

Date Code Title Description
8364 No opposition during term of opposition