Projector having holding unit for light modulating device and supporting member for the holding unit

Patent metadata

Field	Value
Publication number	US-9618755-B2
Application number	US-201213533350-A
Country	US
Kind code	B2
Filing date	Jun 26, 2012
Priority date	Jun 30, 2011
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A projector has plural liquid crystal light valves each of which modulates color light, a cross dichroic prism which combines the color lights modulated by the plural liquid crystal light valves, and a projection lens which projects the light combined by the cross dichroic prism. The projector includes: a holding unit which holds the liquid crystal light valve; and a supporting member having a body unit supported to the cross dichroic prism and first plate-like portions which protrude from the body unit and support the holding unit. The first plate-like portions are inclined from a vertical plane including an optical axis of the liquid crystal light valve.

First claim

What is claimed is:

1. A projector having plural light modulating devices each of which modulates color light, a light combining device which combines the color lights modulated by the plural light modulating devices, and a projection lens which projects the light combined by the light combining device, the projector comprising:
a holding unit having
a frame which holds the light modulating devices, and
a fixture plate; and

a supporting member having a body unit supported to the light combining device and a first plate-like portion which protrudes from the body unit and supports the holding unit;
wherein
the fixture plate holds the frame,
the first plate-like portion is inclined from a vertical plane including an optical axis of the light modulating devices,
the fixture plate has an insertion hole having a rectangular shape, as viewed in plan view, for insertion of the first plate-like portion,
the rectangular insertion hole is inclined from the vertical plane, and
the first plate-like portion is formed with 180-degree rotational symmetry about the optical axis.

2. The projector according to claim 1 , wherein the first plate-like portion is situated on both sides of the vertical plane.

3. The projector according to claim 1 , wherein plural units of the first plate-like portion are arranged outside of the light modulating devices, as viewed from a direction along the optical axis, and are formed in such a way that directions along plate surfaces of the first plate-like portions next to each other intersect with each other.

4. The projector according to claim 1 , wherein the supporting member further includes
a second plate-like portion which supports the holding unit, along at least one of a direction along the vertical plane and a direction orthogonal to the vertical plane.

5. A projector having plural light modulating devices each of which modulates color light, a light combining device which combines the color lights modulated by the plural light modulating devices, and a projection lens which projects the light combined by the light combining device, the projector comprising:
a holding unit having
a frame which holds the light modulating devices, and
a fixture plate; and

a supporting member having
a body unit supported to the light combining device and having an aperture at a central part of the body unit, and
a first plate-like portion which protrudes from the body unit and supports the holding unit,

wherein
the fixture plate holds the frame,
the first plate-like portion is inclined from a vertical plane including an optical axis of the light modulating devices such that extending directions of plate surfaces of the first plate-like portion intersect in the aperture, when viewed in plan view,
the fixture plate has an insertion hole having a rectangular shape, as viewed in plan view, for insertion of the first plate-like portion,
the rectangular insertion hole is inclined from the vertical plane, and
the first plate-like portion is formed with 180-degree rotational symmetry about the optical axis.

Assignees

• Kadotani Masato
• Fukuyama Takanori
• Yoshinaga Kosuke
• Seiko Epson Corp

Inventors

• Kadotani Masato
• Fukuyama Takanori
• Yoshinaga Kosuke

Classifications

• G02B27/141 Primary

  using dichroic mirrors · CPC title

• G03B21/006

  using LCD's · CPC title

• H04N9/3141

  Constructional details thereof (details not peculiar to the presence of an electronic spatial light modulator G03B21/14) · CPC title

• G02B27/102

  for generating a colour image from monochromatic image signal sources · CPC title

• G03B21/145

  Housing details, e.g. position adjustments thereof · CPC title