JPH02121779U - - Google Patents
Info
- Publication number
- JPH02121779U JPH02121779U JP2982789U JP2982789U JPH02121779U JP H02121779 U JPH02121779 U JP H02121779U JP 2982789 U JP2982789 U JP 2982789U JP 2982789 U JP2982789 U JP 2982789U JP H02121779 U JPH02121779 U JP H02121779U
- Authority
- JP
- Japan
- Prior art keywords
- linearly polarized
- wave plate
- ray bundle
- incident
- polarized light
- 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
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
Description
第１図は本考案の一実施例の構成を示す図、第
２図は第１図中の蒸着プリズムに代えて使用でき
るミラーの構造を示す図、第３図は本考案の他の
実施例の構成を示す図、第４図は上記他の実施例
による液晶表示パネルの照射状態を示す図、第５
図は従来例による液晶表示パネルの照射状態を示
す図である。
１……液晶表示パネル、２……照射断面、５，
２３……凸シリンドリカルレンズ、６，２５……
凸シリンドリカルレンズ、７，２６……偏光ビー
ムスプリツタ、８，２７……二分の一波長板、９
，１０，１２，２４，２８，２９……ミラー、１
１……蒸着プリズム、１１ａ……蒸着面、１２ａ
……ミラー蒸着面、１２ｂ……カツト部、２１…
…光源ランプ、２２……コールドミラー、３０…
…合成プリズム。
FIG. 1 is a diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a diagram showing the structure of a mirror that can be used in place of the vapor deposition prism in FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a diagram showing the irradiation state of the liquid crystal display panel according to the other embodiment, and FIG.
The figure is a diagram showing the irradiation state of a liquid crystal display panel according to a conventional example. 1...Liquid crystal display panel, 2...Irradiation cross section, 5,
23...Convex cylindrical lens, 6,25...
Convex cylindrical lens, 7, 26...Polarizing beam splitter, 8, 27...Half wavelength plate, 9
, 10, 12, 24, 28, 29...mirror, 1
1... Vapor deposition prism, 11a... Vapor deposition surface, 12a
...Mirror vapor deposition surface, 12b...Cut portion, 21...
...Light source lamp, 22...Cold mirror, 30...
...Synthetic prism.
Claims (1)
上で平行光線束として射出するレンズ系と、 このレンンズ系からの平行光線束が入射され、
それを互いに偏光面が直交する２つの直線偏光に
分けて異なつた方向に射出する偏光ビームスプリ
ツタと、 この偏光ビームスプリツタからの２つの直線偏
光のいずれか一方が入射され、その偏光面をπ／
２ラジアンだけ回転した上で射出する二分の一波
長板と、 この二分の一波長板からの直線偏光と、上記偏
光ビームスプリツタからの直線偏光のうち二分の
一波長板に入射されなかつた方の直線偏光とを合
成して液晶表示パネルを照射せしめる合成照射部
と、 入射側の偏光板の透過軸が、上記合成照射部か
らの直線偏光の振動方向に平行な液晶表示パネル
とを備えることを特徴とする液晶プロジエクタ。[Scope of Claim for Utility Model Registration] A lens system that converges a divergent ray bundle from a light source lamp and then emits it as a parallel ray bundle, and the parallel ray bundle from this lens system is incident,
A polarizing beam splitter divides the light into two linearly polarized lights whose planes of polarization are perpendicular to each other and outputs them in different directions. π/
A half-wave plate that is rotated by 2 radians and then emitted, the linearly polarized light from this half-wave plate, and the linearly polarized light from the polarization beam splitter that is not incident on the half-wave plate. and a liquid crystal display panel in which the transmission axis of the polarizing plate on the incident side is parallel to the vibration direction of the linearly polarized light from the composite irradiation part. A liquid crystal projector featuring:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2982789U JPH02121779U (en) | 1989-03-17 | 1989-03-17 | |
| US07/426,871 US5042921A (en) | 1988-10-25 | 1989-10-23 | Liquid crystal display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2982789U JPH02121779U (en) | 1989-03-17 | 1989-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02121779U true JPH02121779U (en) | 1990-10-03 |
Family
ID=31254377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2982789U Pending JPH02121779U (en) | 1988-10-25 | 1989-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02121779U (en) |
-
1989
- 1989-03-17 JP JP2982789U patent/JPH02121779U/ja active Pending
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