JPS5648770A - Cooling device of television picture projector - Google Patents
Cooling device of television picture projectorInfo
- 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
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.
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)
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 |
-
1979
- 1979-09-29 JP JP12477479A patent/JPS5648770A/en active Pending
Cited By (4)
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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