JPS57185425A - Light source lamp controller of overhead projector - Google Patents

Light source lamp controller of overhead projector

Info

Publication number
JPS57185425A
JPS57185425A JP56070991A JP7099181A JPS57185425A JP S57185425 A JPS57185425 A JP S57185425A JP 56070991 A JP56070991 A JP 56070991A JP 7099181 A JP7099181 A JP 7099181A JP S57185425 A JPS57185425 A JP S57185425A
Authority
JP
Japan
Prior art keywords
lamp
cell
light source
electric power
circuit
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
JP56070991A
Other languages
English (en)
Other versions
JPS6344211B2 (ja
Inventor
Takakuni Hasegawa
Susumu Ojio
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.)
Riso Kagaku Corp
Original Assignee
Riso Kagaku Corp
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 Riso Kagaku Corp filed Critical Riso Kagaku Corp
Priority to JP56070991A priority Critical patent/JPS57185425A/ja
Priority to US06/371,282 priority patent/US4406530A/en
Priority to EP82103907A priority patent/EP0064723B1/en
Priority to DE8282103907T priority patent/DE3262114D1/de
Publication of JPS57185425A publication Critical patent/JPS57185425A/ja
Publication of JPS6344211B2 publication Critical patent/JPS6344211B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S353/00—Optics: image projectors
    • Y10S353/04—Opaque

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
JP56070991A 1981-05-12 1981-05-12 Light source lamp controller of overhead projector Granted JPS57185425A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56070991A JPS57185425A (en) 1981-05-12 1981-05-12 Light source lamp controller of overhead projector
US06/371,282 US4406530A (en) 1981-05-12 1982-04-23 Reflecting type overhead projector with automatically variable safety illumination
EP82103907A EP0064723B1 (en) 1981-05-12 1982-05-05 Reflecting type overhead projector with automatically variable safety illumination
DE8282103907T DE3262114D1 (en) 1981-05-12 1982-05-05 Reflecting type overhead projector with automatically variable safety illumination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56070991A JPS57185425A (en) 1981-05-12 1981-05-12 Light source lamp controller of overhead projector

Publications (2)

Publication Number Publication Date
JPS57185425A true JPS57185425A (en) 1982-11-15
JPS6344211B2 JPS6344211B2 (ja) 1988-09-02

Family

ID=13447512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56070991A Granted JPS57185425A (en) 1981-05-12 1981-05-12 Light source lamp controller of overhead projector

Country Status (4)

Country Link
US (1) US4406530A (ja)
EP (1) EP0064723B1 (ja)
JP (1) JPS57185425A (ja)
DE (1) DE3262114D1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60191037U (ja) * 1984-05-29 1985-12-18 キャビン工業株式会社 オ−バ−ヘツドプロジエクタ−の調光装置
JPS61167638U (ja) * 1985-04-04 1986-10-17

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544839A (en) * 1982-12-16 1985-10-01 The United States Of America As Represented By The United States Department Of Energy Laser beam monitoring system
US4555621A (en) * 1983-06-24 1985-11-26 Xerox Corporation Illumination control system utilizing an integrating feedback detector
DE3330783A1 (de) * 1983-08-26 1985-03-14 Demolux Gmbh & Co Kg, 6070 Langen Im reflexionsverfahren arbeitender overheadprojektor
US4598199A (en) * 1983-11-03 1986-07-01 Hewlett-Packard Company Safety device for controlling a light signal generator based on fiber position
US4672364A (en) * 1984-06-18 1987-06-09 Carroll Touch Inc Touch input device having power profiling
DE3629771A1 (de) * 1986-09-02 1988-03-03 Demolux Overhead-projektor
US4745272A (en) * 1986-09-15 1988-05-17 Rca Licensing Corporation Apparatus for identifying articles from received illumination with light adjustment means
US4906842A (en) * 1988-04-15 1990-03-06 Brandt, Inc. Document counter and endorser with light source control
US5032022A (en) * 1988-09-14 1991-07-16 Casio Computer Co., Ltd. Projector
US5220363A (en) * 1988-09-14 1993-06-15 Casio Computer Co., Ltd. Projector
JPH0340614U (ja) * 1989-08-25 1991-04-18
US5194729A (en) * 1989-09-29 1993-03-16 Minolta Camera Co., Ltd. Document reading apparatus with area recognizing sensor and obstacle detection
US5077467A (en) * 1990-09-12 1991-12-31 Triad Controls, Inc. Photoelectric switch and relay system with disabling fail-safe monitoring circuitry
US5206673A (en) * 1991-02-22 1993-04-27 Japan Aviation Electronics Industry Limited Reflection type overhead projector
US7382399B1 (en) 1991-05-13 2008-06-03 Sony Coporation Omniview motionless camera orientation system
US5333812A (en) * 1991-06-07 1994-08-02 Shimano Inc. Clutch structure for a fishing reel
US5530496A (en) * 1993-03-05 1996-06-25 Fuji Photo Optical Co., Ltd. Overhead projector
TW560797U (en) * 2002-12-10 2003-11-01 Veutron Corp Optical scanner
US7210791B2 (en) * 2004-11-01 2007-05-01 Dell Products L.P. System and method for projector external hazard proximity protection
US9784301B2 (en) 2014-11-04 2017-10-10 United Technologies Corporation Assembly for plugging an aperture in a body

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH458914A (fr) * 1967-05-29 1968-06-30 Analix S A Dispositif correcteur automatique de luminosité pour projecteur de diapositives ou de films
US3762809A (en) * 1970-01-07 1973-10-02 Ricoh Kk Original mount or holder for optical projection system
US3833297A (en) * 1972-03-13 1974-09-03 Sears Roebuck & Co Automatic brightness control for photographic projectors
DE2540313A1 (de) * 1975-09-10 1977-02-24 Horst Fechner Antriebsaggregat fuer tageslicht- projektoren mit opto-elektronischer steuerung fuer den vor- und ruecktransport von transparentfolien
DE2747916C3 (de) * 1977-10-26 1980-12-11 Fa. Ed. Liesegang, 4000 Duesseldorf Schreibprojektor
FR2455756A1 (fr) * 1979-05-04 1980-11-28 Paul Freres M Ronnet Et Cie Retroprojecteur a lentille de fresnel reflechissante

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60191037U (ja) * 1984-05-29 1985-12-18 キャビン工業株式会社 オ−バ−ヘツドプロジエクタ−の調光装置
JPS61167638U (ja) * 1985-04-04 1986-10-17

Also Published As

Publication number Publication date
EP0064723A1 (en) 1982-11-17
DE3262114D1 (en) 1985-03-14
US4406530A (en) 1983-09-27
JPS6344211B2 (ja) 1988-09-02
EP0064723B1 (en) 1985-01-30

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