JPS5648770A - Cooling device of television picture projector - Google Patents

Cooling device of television picture projector

Info

Publication number
JPS5648770A
JPS5648770A JP12477479A JP12477479A JPS5648770A JP S5648770 A JPS5648770 A JP S5648770A JP 12477479 A JP12477479 A JP 12477479A JP 12477479 A JP12477479 A JP 12477479A JP S5648770 A JPS5648770 A JP S5648770A
Authority
JP
Japan
Prior art keywords
brightness
cooling
projector
rotational frequency
tube
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.)
Pending
Application number
JP12477479A
Other languages
Japanese (ja)
Inventor
Masaharu Murakami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12477479A priority Critical patent/JPS5648770A/en
Publication of JPS5648770A publication Critical patent/JPS5648770A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

PURPOSE:To reduce electric power consumption and noises by controlling the cooling capacity of a fan by interlocking or sharing the brightness controller of a television picture projector. CONSTITUTION:In proportion to the brightness of projector tube 3 supplied with video signals, the rotational frequency of fan motor 5 varies. Then, when the temperature of the tube surface rises with high brightness, the rotational frequency is increased to improve the cooling effect and when with low brightness, the tube surface temperature does not rise much, so the rotational frequency is lowered to attain efficient cooling. Thus, the cooling which corresponds to the brightness of projector tube 3 is possible, the electric power consumption can be reduced and noises due to the fanl etc., can also be reduced.
JP12477479A 1979-09-29 1979-09-29 Cooling device of television picture projector Pending JPS5648770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12477479A JPS5648770A (en) 1979-09-29 1979-09-29 Cooling device of television picture projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12477479A JPS5648770A (en) 1979-09-29 1979-09-29 Cooling device of television picture projector

Publications (1)

Publication Number Publication Date
JPS5648770A true JPS5648770A (en) 1981-05-02

Family

ID=14893774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12477479A Pending JPS5648770A (en) 1979-09-29 1979-09-29 Cooling device of television picture projector

Country Status (1)

Country Link
JP (1) JPS5648770A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01220582A (en) * 1988-02-26 1989-09-04 Sharp Corp Projection television
EP1945016A2 (en) * 2007-01-09 2008-07-16 Samsung Electronics Co., Ltd. Display apparatus,fan unit and fan speed control method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01220582A (en) * 1988-02-26 1989-09-04 Sharp Corp Projection television
EP1945016A2 (en) * 2007-01-09 2008-07-16 Samsung Electronics Co., Ltd. Display apparatus,fan unit and fan speed control method thereof
EP1945016A3 (en) * 2007-01-09 2010-03-03 Samsung Electronics Co., Ltd. Display apparatus,fan unit and fan speed control method thereof
US8050449B2 (en) 2007-01-09 2011-11-01 Samsung Electronics Co., Ltd. Display apparatus, fan unit and fan speed control method thereof

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