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US 6,471,357 B1Granted
Projection display device comprising means for cooling an optical unit and air quantity controlling means
AssigneeSony Corporation
InventorsNobuyuki Hara, Takuji Ohkubo
Life of this patent
Estimating the term…
Abstract
A projection display device includes an optical unit, a cooling fan for cooling the circumference of light valves of the optical unit, and an exterior cabinet accommodating the optical unit and the cooling fan. The cooling fan is in the form of a sirocco fan. Cooling air of the cooling fan is brought to the circumference of the light valves through a duct, and is distributed by air-quantity controlling means arranged in the duct for effective cooling thereof.
Claims20
A projection display device, comprising:
- an optical unit comprising a light source and a group of light valves, said light source generating a light incident on one or more of said group of light valves;
- means for cooling said optical unit, said cooling means comprising a sirocco fan, said cooling means comprising a sirocco fan, a duct for bringing a cooling air produced by said sirocco fan to at least said group of light valves, said duct extending from said sirocco fan adjacent said group of light valves so that said cooling air from said duct is incident on said group of light valves, and air quantity controlling means arranged in said duct for controlling an air quantity of said cooling air;
- and
- an exterior cabinet accommodating said optical unit and said cooling means.
1 more element
A projection display device, comprising:
- an optical unit comprising a light source and a group of light valves, said light source generating a light incident on one or more of said group of light valves;
- means for cooling said optical unit, said cooling means comprising a sirocco fan and a duct for bringing a cooling air produced by said sirocco fan to that least said group of light valves, said duct extending from said sirocco fan to a position adjacent said group of light valves so that said cooling air from said duct is incident on said group of light valves;
- and
- a vertically situated exterior cabinet accommodating said optical unit and said cooling means so that said light source is positioned under said group of light valves, said cooling means being disposed in a lower portion of said exterior cabinet.
1 more element
Dependencies are inferred from the claim text.