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US 7,029,122 B2Granted
Projector
AssigneeSony Corporation
InventorHirohisa Ishino
Life of this patent
Estimating the term…
Abstract
A projector for projecting an image to an external screen in which an optical unit, includes rectangular liquid crystal panels disposed such that the short sides thereof are substantially parallel with a plane including principal light beams of the respective color light beams to be composited by a prism. Transmission cables are drawn out from the short sides of the respective liquid crystal panels, and a cooling fan is disposed such that the direction of cooling air is approximately parallel with the long sides of the liquid crystal panels.
Claims5
A projector having an optical system comprising:
- a light source,
- color-separation mirrors for color-separating light from the light source into a plurality of color light beams,
- a plurality of modulation means for modulating the respective color light beams color-separated by the color-separation mirrors,
- a prism for compositing the color light beams modulated by the modulation means,
- a projection means for projecting light composited by the prism,
- a cooling fan for cooling at least the modulation means, wherein the cooling fan is disposed such that a direction of cooling air is approximately parallel with long sides of the modulation means, and
- a circuit board disposed along a linear path of cooling air sent from the cooling fan, whereby the cooling fan cools the circuit board as well as the modulation means,
- wherein each of the modulation means is formed substantially in the shape of a rectangle with its aspect ratio set to be n:1 (n>1.6), and short sides of the modulation means are disposed to be substantially parallel with a plane including principal light beams of the respective color light beams to be composited by the prism.
5 more elements
Dependencies are inferred from the claim text.