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Image display apparatus and light source unit

A technology of an image display device and a light source device, which is applied in projection devices, image communication, optics, etc., can solve the problems of large-scale overall devices and high costs, and achieve the effect of small size

Inactive Publication Date: 2007-04-04
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the projector device described in the above-mentioned Patent Document 1, since a plurality of semiconductor lasers are arranged in different places for each color, it is necessary to separately install each optical component for each color light, so the cost increases and the whole device becomes large. the problem of
In addition, since the semiconductor laser and the collimator lens are arranged separately, the overall size of the light source device including the semiconductor laser and the collimator lens is also enlarged.

Method used

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  • Image display apparatus and light source unit
  • Image display apparatus and light source unit
  • Image display apparatus and light source unit

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no. 1 Embodiment approach

[0051] First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2 .

[0052] As the image display device of the present embodiment, as shown in FIG. 1 , a projector 1 that projects light corresponding to an image signal onto a screen 60 will be described as an example.

[0053] The projector 1, as shown in FIG. 1 and FIG. 2 , includes: a light source device 10 having a light source device 10R for emitting red light (hereinafter referred to as "R light") for emitting red light (hereinafter referred to as "R light") and a light source device 10R for emitting green light ( Hereinafter, referred to as "G light.") light source device 10G for G light and light source device 10B for B light emitting blue light (hereinafter referred to as "B light"); a plurality of transmissive liquid crystal light valves (light modulation Devices: liquid crystal panels (hereinafter referred to as liquid crystal light valves) 30R, 30G, and 30B that respectivel...

no. 2 Embodiment approach

[0071] Next, a second embodiment of the present invention will be described with reference to FIG. 3 . In addition, in each embodiment described below, the same code|symbol is attached|subjected to the same structure as the projector 1 of 1st Embodiment mentioned above, and description is abbreviate|omitted.

[0072] In the projector 70 of this embodiment, the second embodiment differs from the first embodiment in that an infrared cut filter 71 is provided.

[0073]Infrared cutoff filter 71, as shown in FIG. 3, is fixed to block the opening 13a of housing 13; The side opposite to the side of 11G and 11B. The infrared cut filter 71 transmits visible light (about 380 to about 780nm), and blocks infrared light (about 780nm). Homogenize.

[0074] In addition, the light diffusing plate 15 is provided with an exciter 72 that changes the diffusion state of the laser light incident from the incident surface 15 a and emitted from the emitting surface 15 b of the light diffusing plat...

no. 3 Embodiment approach

[0079] Next, a third embodiment of the present invention will be described with reference to FIG. 4 .

[0080] FIG. 4( a ) is a plan view of the projector 80 of this embodiment; FIG. 4( b ) is a side view of the projector 80 of this embodiment.

[0081] The projector 80 of this embodiment differs from the first embodiment in that the optical path lengths between the illuminance equalizing element 14 and the liquid crystal light valves 30R, 30G, and 30B are all the same in the third embodiment.

[0082] In the projector 80 , as shown in FIGS. 4( a ) and ( b ), the optical paths of the R light and the B light are bent in the horizontal plane, and only the optical path of the G light is bent in the vertical plane. Specifically, the projector 80 includes: a first mirror 81 that converts the optical path of light emitted from the laser light source 11G by 90 degrees, and a second mirror that reflects the light reflected by the first mirror in the direction of the liquid crystal lig...

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Abstract

The invention provides an image display apparatus and a light source unit, which can be downsized and reduce cost. An image display apparatus includes: a plurality of laser beam sources which emit different color light beams; a plurality of light modulators which modulate the light beams emitted from the laser beam sources; and a projection element which projects the light beams modulated by the light modulators, wherein the light modulators are disposed such that the light beams are incident from different directions, and the laser beam sources are concentrated in a single position.

Description

technical field [0001] The present invention relates to an image display device and a light source device. Background technique [0002] Light source devices used in image display devices have been desired to be small, bright, and have a uniform illuminance distribution of illumination light. As this light source, for example, a light source that collimates light emitted from a semiconductor laser is mainly used (for example, Patent Document 1). [0003] The projector device described in this patent document 1 includes: red, green, and blue semiconductor lasers; a collimator lens that makes the laser light emitted from each semiconductor laser into parallel light; an optical fiber for guiding light; and a spatial light modulator for modulating each color emitted from the optical fiber. Then, the light passing through each spatial light modulator is displayed on a screen through a projection lens. [0004] [Patent Document 1] JP-A-2003-233123 [0005] However, in the proj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/00G02F1/13H04N5/74
CPCH04N9/3197G03B21/14H04N9/3105G03B21/16H04N9/315G03B21/145G03B21/2033G03B21/208G03B33/12G02F1/13G03B21/00H04N5/74
Inventor 米窪政敏
Owner SEIKO EPSON CORP
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