JPH0481738A - Projection type display device - Google Patents

Projection type display device

Info

Publication number
JPH0481738A
JPH0481738A JP12768990A JP12768990A JPH0481738A JP H0481738 A JPH0481738 A JP H0481738A JP 12768990 A JP12768990 A JP 12768990A JP 12768990 A JP12768990 A JP 12768990A JP H0481738 A JPH0481738 A JP H0481738A
Authority
JP
Japan
Prior art keywords
luminous flux
projection
light source
light
15g
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
Application number
JP12768990A
Inventor
Hidekazu Tode
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12768990A priority Critical patent/JPH0481738A/en
Priority claimed from US07/645,631 external-priority patent/US5135300A/en
Publication of JPH0481738A publication Critical patent/JPH0481738A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To improve the utilization efficiency of the luminous flux from a light source by providing an optical interference filter on the projection surface of a light source, passing only vertical luminous flux through the projection surface, and sectioning the projection light rectangularly.
CONSTITUTION: The luminous flux passage part of a projection opening part 25 is in nearly the same rectangular shape with light valves 15B, 15G, and 15R, and consequently the luminous flux 8 which is projected by the light source 1 in parallel through the optical interference filter 27 is sectioned in nearly the same shape with the light valves, which can be irradiated without any waste. Then this luminous flux is separated into three colors as usual to irradiate the corresponding light valves 15R, 15G, and 15B respectively, and they are put together by dichroic mirrors 19 and 21 as a composition optical system and enlarged and projected on the screen 24 through a projection lens 23. Consequently, the use efficiency of the projection luminous flux from the light source can be increased.
COPYRIGHT: (C)1992,JPO&Japio
JP12768990A 1990-05-16 1990-05-16 Projection type display device Pending JPH0481738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12768990A JPH0481738A (en) 1990-05-16 1990-05-16 Projection type display device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP12768990A JPH0481738A (en) 1990-05-16 1990-05-16 Projection type display device
US07/645,631 US5135300A (en) 1990-02-01 1991-01-25 Projection color display apparatus
DE4102954A DE4102954A1 (en) 1990-02-01 1991-01-29 Device for projection of color representations

Publications (1)

Publication Number Publication Date
JPH0481738A true JPH0481738A (en) 1992-03-16

Family

ID=14966272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12768990A Pending JPH0481738A (en) 1990-05-16 1990-05-16 Projection type display device

Country Status (1)

Country Link
JP (1) JPH0481738A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006332042A (en) * 2005-04-11 2006-12-07 Philips Lumileds Lightng Co Llc Illuminator using reflective optics with recycling and color mixing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006332042A (en) * 2005-04-11 2006-12-07 Philips Lumileds Lightng Co Llc Illuminator using reflective optics with recycling and color mixing

Similar Documents

Publication Publication Date Title
JPS597359A (en) Lighting equipment
DE3167355D1 (en) Multi-effect lighting source, especially for use as a projector in photography, cinematography and television, or as a lighting fixture
JPH03217814A (en) Liquid crystal projector
JPH0460538A (en) Color liquid crystal display device
JPS59117876A (en) Personal liquid crystal video display device
JPH0350983A (en) Modulation system for color projection display
JPS60146567A (en) Color picture reader
JPH04230733A (en) Device for projecting image
JPS57638A (en) Additive color source device
JPH0456837A (en) Screen for front projection television
JPH0264690A (en) Contrast lowering device for mask between picture elements of image optical system by fine picture element train
JPS63182621A (en) Light source device for endoscope
JPH04233440A (en) Optical inspection apparatus
JPH04253044A (en) Liquid crystal projector
JPH0351882A (en) Projection-type image display device
JPH03248141A (en) Projection type picture display device
JPH0384532A (en) Back projection screen
JPH032745A (en) High-definition color display device
JPS62150317A (en) Color liquid crystal projector
JPS5271944A (en) Projection-type color tv unit
JPS63118125A (en) Liquid crystal display device
JPH02118560A (en) Back projection screen
TW200702884A (en) Illuminating device and projector
JPH04158829A (en) Retinal camera
JPS53115137A (en) Projection-type color television device