TW376645B - Projection type image display device - Google Patents
Projection type image display deviceInfo
- Publication number
- TW376645B TW376645B TW087114604A TW87114604A TW376645B TW 376645 B TW376645 B TW 376645B TW 087114604 A TW087114604 A TW 087114604A TW 87114604 A TW87114604 A TW 87114604A TW 376645 B TW376645 B TW 376645B
- Authority
- TW
- Taiwan
- Prior art keywords
- light
- display device
- image display
- type image
- projection type
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
- H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
Abstract
The invented projection type image display device comprises chromatic light separating means for separating the light from the light source part (101) into red, blue and green lights, modulation means for modulating the separated light, and a projection optical system (11) for expanding and projecting the modulated light beam on the screen (115). The chromatic light separating means comprises a dichroic mirror (105) capable of transmitting the blue light and reflecting the green light, a blue light modulation means (109) using the P polarizating component of the transmitted blue light, and a green light modulation means (119) using the reflected S polarizating component of the reflected green light, thereby removing the non-uniform color by the difference between the incidence and the incident angle of the dichroic mirror, and forming a 3-panel type projection type image display device capable of maintaining a constant light utilization efficiency.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25315497 | 1997-09-18 | ||
JP35045097 | 1997-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW376645B true TW376645B (en) | 1999-12-11 |
Family
ID=26541058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW087114604A TW376645B (en) | 1997-09-18 | 1998-09-03 | Projection type image display device |
Country Status (2)
Country | Link |
---|---|
TW (1) | TW376645B (en) |
WO (1) | WO1999014626A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW451106B (en) * | 2000-08-17 | 2001-08-21 | Primax Electronics Ltd | Projection display device to display electronic image |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6411289A (en) * | 1987-07-03 | 1989-01-13 | Ricoh Kk | Liquid crystal projector |
JP3023152B2 (en) * | 1990-08-23 | 2000-03-21 | 株式会社トプコン | Color separation optics |
JPH07113709B2 (en) * | 1990-09-21 | 1995-12-06 | 松下電器産業株式会社 | Projection display device |
JP3347357B2 (en) * | 1992-04-15 | 2002-11-20 | 富士通株式会社 | Projection display device |
-
1998
- 1998-09-03 TW TW087114604A patent/TW376645B/en active
- 1998-09-10 WO PCT/JP1998/004105 patent/WO1999014626A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO1999014626A1 (en) | 1999-03-25 |
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