JP2001228534A - Projection type display device and method for adjusting contrast - Google Patents

Projection type display device and method for adjusting contrast

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Publication number
JP2001228534A
JP2001228534A JP2000039723A JP2000039723A JP2001228534A JP 2001228534 A JP2001228534 A JP 2001228534A JP 2000039723 A JP2000039723 A JP 2000039723A JP 2000039723 A JP2000039723 A JP 2000039723A JP 2001228534 A JP2001228534 A JP 2001228534A
Authority
JP
Japan
Prior art keywords
light
phase plate
quarter
light valve
color
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
JP2000039723A
Other languages
Japanese (ja)
Inventor
Hisao Ozeki
尚夫 大関
Koichiro Ishii
浩一郎 石井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikon Corp
Original Assignee
Nikon 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 Nikon Corp filed Critical Nikon Corp
Priority to JP2000039723A priority Critical patent/JP2001228534A/en
Publication of JP2001228534A publication Critical patent/JP2001228534A/en
Pending legal-status Critical Current

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  • Projection Apparatus (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain projected picture whose contrast is excellent. SOLUTION: Relating to a projection type display device having a light source, a color resolving optical system, a polarizing beam splitter arranged for each color light beam, a reflection type light valve, a polarizing beam splitter for each color light beam and a 1/4 wavelength phase plate, a color synthetic optical system and a projection lens, a 1/4 wavelength phase plate holder possesses a projected part having a screw part, and a cover member possesses a circular-arc hole, and the projected part of the 1/4 wavelength phase plate holder to which the 1/4 wavelength phase plate is attached is projected together with the 1/4 wavelength phase plate from the aperture part of the cover member to the outside of the cover member, and the cover member is screwed and fixed by a screw by passing the screw part of the projected part through the circular-arc hole of the cover member at the holder member, and a constitution obtained by integrating the light valve, the 1/4 wavelength phase plate and the polarizing beam splitter is obtained by attaching a first attaching member attached to the polarizing beam splitter, the 1/4 wavelength phase plate and a light shielding plate in the integrating member of the light valve.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明はＲ，Ｇ，Ｂ光用にそ
れぞれ配置した反射型ライトバルブに入射した各色光を
前記ライトバルブで変調、反射して射出させ、各色光毎
に配置した偏光ビームスプリッタにて変調光を検光して
取り出し、当該各色変調光を色合成プリズムで色合成
し、投射レンズにて拡大投射するような構成の投射型表
示装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarization type light valve which modulates, reflects and emits each color light incident on a reflection type light valve arranged for each of R, G and B light, and arranges each of the color lights. The present invention relates to a projection display device having a configuration in which modulated light is detected and taken out by a beam splitter, and the respective color modulated lights are color-combined by a color combining prism and enlarged and projected by a projection lens.

【０００２】[0002]

【従来の技術】Ｒ，Ｇ，Ｂ光用にそれぞれ配置した反射
型ライトバルブに入射した各色光を前記ライトバルブで
変調、反射して射出させ、各色光毎に配置した偏光ビー
ムスプリッタにて変調光を検光して取り出し、当該各色
変調光を色合成プリズムで色合成し、投射レンズにて拡
大投射するような構成の投射型表示装置に関して、特許
登録公報２５９９３０９号の図１３に記載の装置が知ら
れている。この構成図を図８に記載し、従来例として説
明する。2. Description of the Related Art Each color light incident on a reflection type light valve arranged for each of R, G, B light is modulated by the light valve, reflected and emitted, and modulated by a polarization beam splitter arranged for each color light. FIG. 13 of Japanese Patent Publication No. 2599309 discloses a projection type display device having a configuration in which light is detected and extracted, and the respective color-modulated lights are color-combined by a color-combining prism and enlarged and projected by a projection lens. It has been known. This configuration diagram is shown in FIG. 8 and will be described as a conventional example.

【０００３】光源６１から射出された光源光は光軸上に
略平行に配置されたＢ光反射ダイクロイックミラー６２
とＧ光反射ダイクロイックミラー６３とから構成される
色分解光学系に入射され、Ｒ（赤）光、Ｇ（緑）光なら
びにＢ（青）光に色分解される。Ｂ光は折り曲げミラー
にて光軸を直角に変えて進行し、Ｂ光用偏光ビームスプ
リッタ６４Ｂに入射される。Ｇ光、Ｒ光はそれぞれ配置
された偏光ビームスプリッタ６４Ｇ、６４Ｒに入射され
る。各色用偏光ビームスプリッタに入射した光はそれぞ
れ各偏光ビームスプリッタの偏光分離部によって偏光分
離作用を受け、反射して射出する各色Ｓ偏光と、透過し
て廃棄される各色Ｐ偏光とに分離される。Light emitted from a light source 61 is reflected by a B light reflecting dichroic mirror 62 disposed substantially in parallel on the optical axis.
And a G light reflecting dichroic mirror 63, and is incident on a color separation optical system, where the light is separated into R (red) light, G (green) light and B (blue) light. The B light travels while changing the optical axis at a right angle by the bending mirror, and is incident on the B light polarizing beam splitter 64B. The G light and the R light are incident on the arranged polarization beam splitters 64G and 64R, respectively. The light that has entered the polarization beam splitters for each color is subjected to a polarization separation operation by the polarization separation unit of each polarization beam splitter, and is separated into S-polarized light of each color reflected and emitted and P-polarized light of each color transmitted and discarded. .

【０００４】各色のＳ偏光は射出面近傍に配置された各
色光用反射型ライトバルブ６５Ｒ、６５Ｇならびに６５
Ｂに入射し、各色光の色信号によって変調作用を受けて
反射、射出されて再度各色光用偏光ビームスプリッタに
入射され、変調光（Ｐ偏光）を透過して、検光し取り出
す。各色光の検光光は色合成光学系を構成するクロスダ
イクロイックプリズム６６に入射し、合成光を投射レン
ズ６７に入射させ、図示しないスクリーン上にフルカラ
ー像として投射する。[0004] The S-polarized light of each color is reflected by the reflective light valves 65R, 65G, and 65 for each color light arranged near the exit surface.
B is reflected by a color signal of each color light, reflected, emitted, and then re-enters the polarization beam splitter for each color light, transmits the modulated light (P-polarized light), and detects and extracts the light. The analysis light of each color light enters the cross dichroic prism 66 constituting the color combining optical system, and the combined light enters the projection lens 67 and is projected as a full-color image on a screen (not shown).

【０００５】従来、このような構成の投射型表示装置に
おいては、上記説明にかかる各構成部材は、投射型表示
装置の外観を構成する筐体部材の中に配置され、その筐
体の一部を構成する床部材を構成する基板上にそれぞれ
配置する構成としていた。上記フルカラー投射型表示装
置においては投射像のコントラストが上がらない問題や
環境温度等の変化によってスクリーン上のフルカラー像
の画素がずれてしまう、いわゆるレジストレーションず
れが発生するという問題があった。Conventionally, in a projection display device having such a configuration, each of the constituent members described above is disposed in a housing member constituting the appearance of the projection display device, and a part of the housing is provided. Have been arranged on the respective boards constituting the floor members. The above-described full-color projection display device has a problem that the contrast of a projected image does not increase and a problem that a so-called registration shift occurs in which a pixel of a full-color image on a screen shifts due to a change in environmental temperature or the like.

【０００６】偏光ビームスプリッタと反射型ライトバル
ブを使用する投射型表示装置においてコントラスト向上
をはかる方法として、特公平７−３８０５０公報に記載
の方法が知られている。前記公報図１に記載の構成図を
図９に記載し、説明する。光源２１から射出された光源
光は偏光ビームスプリッタ２２に光軸３０にて入射し、
偏光分離部に反射されたＳ偏光は偏光ビームスプリッタ
を射出し、光軸上に配置された１／４波長位相板を経て
反射型ライトバルブ２６に入射される。なお、前記波長
板の進相軸２５は前記の光軸３０に平行となるように、
遅相軸２８は進相軸２９と垂直に配置される。反射型ラ
イトバルブに反射されて入射光軸と同じ光軸で逆行して
進行する光は１／４波長位相板２８を経て偏光ビームス
プリッタに入射し、変調光（Ｐ偏光）のみを透過し（検
光）して、投射レンズ２７にて投射される。A method described in Japanese Patent Publication No. 7-38050 is known as a method for improving contrast in a projection type display device using a polarizing beam splitter and a reflection type light valve. The configuration diagram described in FIG. 1 is described in FIG. 9 and will be described. The light source light emitted from the light source 21 enters the polarization beam splitter 22 at the optical axis 30,
The S-polarized light reflected by the polarization splitter exits the polarization beam splitter, and enters the reflection type light valve 26 via a quarter-wave phase plate arranged on the optical axis. Note that the fast axis 25 of the wave plate is parallel to the optical axis 30.
The slow axis 28 is arranged perpendicular to the fast axis 29. The light reflected by the reflection type light valve and traveling backward in the same optical axis as the incident optical axis enters the polarization beam splitter via the quarter-wave phase plate 28, and transmits only the modulated light (P-polarized light) ( (Analysis) and projected by the projection lens 27.

【０００７】コントラストが向上する理由は、前記公報
に詳細に記載されているのでここではその説明は省略す
る。従来例にて記載の投射型表示装置においては、上記
方法を採用するには、Ｒ、Ｇ、Ｂ光各色光用のライトバ
ルブに対してそれぞれ配置されるために、各色光用ライ
トバルブと偏光ビームスプリッタの間にそれぞれ上記の
１／４波長位相板を配置すればよい。The reason why the contrast is improved is described in detail in the above-mentioned publication, and the description thereof is omitted here. In the projection display device described in the conventional example, in order to adopt the above-described method, since the light valves for the R, G, and B lights are respectively disposed for the respective light valves, the light valve for each color light and the polarization What is necessary is just to arrange | position the said 1/4 wavelength phase plate between beam splitters, respectively.

【０００８】[0008]

【発明が解決しようとする課題】しかし、従来例にて説
明した構成の投射型表示装置において、投射像のコント
ラストを向上すべく、前記の構成を有するように１／４
波長位相板をライトバルブからの入射面（射出面と同
じ）に波長板を貼り付けて前記コントラスト向上を観察
してみたところ、その効果にばらつきがあった。本発明
者は、このばらつきの問題を研究し、当該問題の原因
が、１／４波長位相板の光学軸（前記進相軸、遅相軸の
こと）の方向にばらつきがあることを見いだした。つま
り、通常１／４波長位相板は前記光学軸の方向が外形形
状に切りかけを有して外見からわかるようになっている
が、当該外見からのみではその外見形成に誤差を有して
いることと、さらに、光学系の組立にかかる誤差も加わ
って、配置された光軸の方向に累積の誤差が発生し、一
義的には形状に依存して正確な光軸の位置を決定できな
かった。However, in the projection type display device having the configuration described in the conventional example, the projection display device has the above configuration to improve the contrast of the projected image.
When the wavelength phase plate was attached to the incident surface (same as the exit surface) from the light valve and the contrast improvement was observed, the effect varied. The present inventor has studied the problem of the variation and found that the cause of the problem is variation in the direction of the optical axes (the fast axis and the slow axis) of the quarter-wave phase plate. . In other words, the quarter-wave phase plate usually has a notch in the external shape so that the direction of the optical axis can be seen from the external appearance, but there is an error in the appearance formation only from the external appearance. In addition, errors in assembling the optical system were added, and cumulative errors occurred in the direction of the arranged optical axis, and the position of the optical axis could not be determined accurately depending on the shape. .

【０００９】そこで、１／４位相板を光軸を中心に回転
させて投射像を観測する実験を行ったところ、回転に応
じてコントラストが変化し、その中で投射像のコントラ
ストが最適なところが存在し、この位置にて前記波長位
相板を固定保持すれば上記発明のコントラストが最良な
装置を提供できることを見いだしたのである。Then, when an experiment was performed in which the projected image was observed by rotating the quarter-phase plate around the optical axis, the contrast changed according to the rotation, and the place where the contrast of the projected image was optimum was found. It has been found that if the wavelength phase plate is fixedly held at this position, an apparatus having the best contrast of the present invention can be provided.

【００１０】[0010]

【課題を解決するための手段】そこで、本発明は第１に
「光源と、Ｒ（赤）光及びＧ（緑）光及びＢ（青）光に
色分解する色分解光学系と、各色光毎に配置した偏光ビ
ームスプリッタと、前記各色光毎に配置した反射型ライ
トバルブと、前記各色光用偏光ビームスプリッタと前記
各色光用ライトバルブとの間に配置した１／４波長位相
板と、色合成光学系と、投射レンズを有する投射型表示
装置において、前記ライトバルブと前記１／４波長位相
板と前記偏光ビームスプリッタは一体化され、該一体化
は、前記偏光ビームスプリッタに取り付けた第１一体化
部材と、前記１／４波長位相板及び前記ライトバルブを
一体化した部材とを取り付けることによりおこない、前
記１／４波長位相板と前記ライトバルブを一体化する一
体化部材は、カバー部材と、１／４波長位相板ホルダー
と、該記１／４波長位相板ホルダーに固着された１／４
波長位相板と、光遮光板と、前記ライトバルブと、前記
ライトバルブが固着された背板を有し、前記１／４波長
位相板ホルダーはネジ部を有する突起部を有し、前記カ
バー部材は円弧状穴を有し、前記１／４波長位相板を取
り付けた前記１／４波長位相板ホルダーは１／４波長位
相板と共に前記カバー部材中に前記カバー部材の開口部
より突起部を前記カバー部材外へ突出させ、前記ホルダ
ー部材は突起部ネジ部とカバー部材の円弧状穴とを通し
て前記カバー部材をネジにて螺着固定され、前記前記ラ
イトバルブと、前記１／４波長位相板及び前記偏光ビー
ムスプリッタが一体化された構成は、前記偏光ビームス
プリッタに取り付けた第１取り付け部材と、前記１／４
波長位相板及び前記ライトバルブの一体化部材中の前記
遮光板とを取り付けてなることを特徴とする投射型表示
装置（請求項１）を提供する。第２に「光源と、偏光ビ
ームスプリッタと、Ｒ（赤）光及びＧ（緑）光及びＢ
（青）光に分解する色分解光学系と前記各色光を色合成
する合成光学系とを兼用する複数のプリズムからなる色
分解合成光学系と、前記各色光毎に配置した反射型ライ
トバルブと、前記色分解合成プリズムと各色光用ライト
バルブとの間に配置した１／４波長位相板と、投射レン
ズを有する投射型表示装置において、前記ライトバルブ
と、１／４波長位相板及び前記複数のプリズムは一体化
され、該一体化は、前記プリズムに取り付けた第１ライ
トバルブ取り付け部材と前記１／４波長位相板を一体化
した部材とを取り付けることにより行い、前記１／４波
長位相板とライトバルブの一体化部材は、カバー部材
と、１／４波長位相板ホルダーと、前記１／４波長板ホ
ルダーに固着された１／４波長位相板と、光遮光板と、
ライトバルブと、前記ライトバルブが固着された背板と
から構成され、前記１／４波長位相板ホルダーはネジ部
を具えた突起部を有し、前記カバー部材は円弧状穴を有
し、前記１／４波長位相板を取り付けた前記１／４波長
位相板ホルダーは１／４波長位相板と共に、前記カバー
部材中に前記カバー部材の開口部より突起部をカバー部
材外へ突出した構成にて配置され、前記ホルダー部材は
突起部ネジ部とカバー部材の円弧状穴とを通して前記カ
バー部材をネジにて螺着固定され、前記ライトバルブ
と、前記１／４波長位相板及び前記偏光ビームスプリッ
タの一体化は、前記偏光ビームスプリッタに取り付けた
第１取り付け部材と、前記１／４波長位相板と前記ライ
トバルブの一体化部材中の前記遮光板とを取り付けて行
うことを特徴とする投射型表示装置（請求項２）」を提
供する。第３に「光源と、偏光ビームスプリッタと、Ｒ
（赤）光及びＧ（緑）光及びにＢ（青）光に分解する色
分解光学系と前記各色光を色合成する合成光学系とを兼
用する複数のプリズムからなる色分解合成光学系と、前
記各色光毎に配置した反射型ライトバルブと、前記色分
解合成プリズムと各色光用ライトバルブとの間に配置し
た１／４波長位相板と、投射レンズを有する投射型表示
装置において、前記ライトバルブと、１／４波長位相板
及び前記複数のプリズムは一体化され、該一体化は、前
記プリズムに取り付けた第１ライトバルブ取り付け部材
と前記１／４波長位相板を一体化した部材とを取り付け
ることにより行い、前記１／４波長位相板とライトバル
ブの一体化部材は、カバー部材と、１／４波長位相板ホ
ルダーと、前記１／４波長板ホルダーに固着された１／
４波長位相板と、光遮光板と、ライトバルブと、前記ラ
イトバルブが固着された背板を有し、前記１／４波長位
相板ホルダーはネジ部を有する突起部を有し、前記カバ
ー部材は円弧状穴を有し、前記１／４波長位相板を取り
付けた前記１／４波長位相板ホルダーは前記１／４波長
位相板と共に、前記カバー部材中に前記カバー部材の開
口部より突起部を前記カバー部材外へ突出した構成にて
配置され、前記ホルダー部材は突起部ネジ部とカバー部
材の円弧状穴とを通して前記カバー部材をネジにて螺着
固定され、前記ライトバルブと、前記１／４波長位相板
及び前記偏光ビームスプリッタの一体化は、前記偏光ビ
ームスプリッタに取り付けた第１取り付け部材と、前記
１／４波長位相板と前記ライトバルブの一体化部材中の
前記カバー部材とを取り付けて行うことを特徴とする投
射型表示装置（請求項３）」を提供する。第４に「前記
１／４波長位相板ホルダー及び前記カバー部材は、前記
ホルダー部材の先端部ネジ部への螺着前に前記カバー部
の円弧穴部に嵌入させたネジを前記穴部に沿って移動し
前記１／４波長位相板を回転させ、投射像のコントラス
トを調節することを特徴とする請求項１又は２又は３に
記載の投射型表示装置の投射像のコントラスト調節方法
（請求項４）を提供する。第５に「光源と、Ｒ（赤）光
及びＧ（緑）光及びＢ（青）光に色分解する色分解光学
系と、各色光毎に配置した偏光ビームスプリッタと、前
記各色光毎に配置した反射型ライトバルブと、前記各色
光用偏光ビームスプリッタと前記各色光用ライトバルブ
との間に配置した１／４波長位相板と、色合成光学系
と、投射レンズを有する投射型表示装置において、前記
ライトバルブと、前記１／４波長位相板と前記偏光ビー
ムスプリッタは一体化され、該一体化は前記ライトバル
ブに取り付けた第１ライトバルブ取り付け部材と前記１
／４波長位相板を一体化した部材とを取り付けることに
より行い、前記１／４波長位相板とライトバルブとを一
体化する一体化部材は、カバー部材と、１／４波長位相
板ホルダーと、該記１／４波長板ホルダーに固着された
１／４波長位相板と、光遮光板と、前記ライトバルブ
と、前記ライトバルブが固着された背板を有し、前記１
／４波長位相板ホルダーは先端部を折り曲げた突起部を
有し、前記光遮光部材は円弧状穴を有し、前記１／４波
長位相板を取り付けた前記１／４波長位相板ホルダー
は、前記１／４波長位相板と共に前記カバー部材中に前
記カバー部材の開口部より突起部を前記カバー部材外へ
突出した構成を有し、前記ホルダー部材突起部の先端折
り曲げ部は、前記光遮光部材の円弧状穴に挿入され、前
記前記ライトバルブと、前記１／４波長位相板及び前記
偏光ビームスプリッタが一体化された構成は、前記偏光
ビームスプリッタに取り付けた第１取り付け部材と、前
記１／４波長位相板及び前記ライトバルブの一体化部材
中の前記遮光板とを取り付けてなることを特徴とする投
射型表示装置（請求項５）」を提供する。第６に「光源
と、偏光ビームスプリッタと、Ｒ（赤）光及びＧ（緑）
光及びＢ（青）光に分解する色分解光学系と前記各色光
を色合成する合成光学系とを兼用する複数のプリズムか
らなる色分解合成光学系と、前記各色光毎に配置した反
射型ライトバルブと、前記色分解合成プリズムと各色光
用ライトバルブとの間に配置した１／４波長位相板と、
投射レンズを有する投射型表示装置において、前記ライ
トバルブと、前記１／４波長位相板及び前記複数のプリ
ズムは一体化され、該一体化は、前記プリズムに取り付
けた第１ライトバルブ取り付け部材と前記１／４波長位
相板を一体化した部材とを取り付けることにより行い、
前記１／４波長位相板とライトバルブの一体化部材は、
カバー部材と、１／４波長位相板ホルダーと、前記１／
４波長板と、光遮光部材と、前記ライトバルブと、背板
を有し、前記１／４波長位相板ホルダーは先端部を折り
曲げた突起部を有し、前記光遮光部材は円弧状穴を有
し、前記１／４波長位相板を取り付けた前記１／４波長
位相板ホルダーは前記１／４波長位相板と共に、前記カ
バー部材中の開口部より突起部を前記カバー部材外へ突
出させ、前記突起部の先端折り曲げ部材は、前記円弧状
穴に挿入され、前記ライトバルブと、前記１／４波長位
相板及び前記偏光ビームスプリッタの一体化は、前記偏
光ビームスプリッタに取り付けた第１取り付け部材と、
前記１／４波長位相板と前記ライトバルブの一体化部材
中の前記遮光部材とを取り付けて行うことを特徴とする
投射型表示装置（請求項６）」を提供する。第７に「前
記１／４波長板ホルダー部材の突起部先端折り曲げ部を
前記光遮光部材の前記円弧状穴部に挿入する前に前記円
弧状穴部に沿って移動させ前記１／４波長位相板を回転
させ、投射像のコントラストを調節することを特徴とす
る請求項６に記載の投射型表示装置の投射像のコントラ
スト調節方法（請求項７）」を提供する。第８に「光源
と、Ｒ（赤）光及びＧ（緑）光及びＢ（青）光に色分解
する色分解光学系と、各色光毎に配置した偏光ビームス
プリッタと、前記各色光毎に配置した反射型ライトバル
ブと、前記各色光用偏光ビームスプリッタと前記各色光
用ライトバルブとの間に配置した１／４波長位相板と、
色合成光学系と、投射レンズを有する投射型表示装置に
おいて、前記ライトバルブと前記１／４波長位相板と前
記偏光ビームスプリッタは一体化され、前記一体化は前
記ライトバルブに取り付けた第１ライトバルブ取り付け
部材と前記１／４波長位相板を一体化した部材とを取り
付けることにより行い、前記１／４波長位相板とライト
バルブとを一体化する一体化部材は、カバー部材及び１
／４波長位相板ホルダー及び該記１／４波長板ホルダー
に固着された１／４波長位相板及び光遮光板及び前記ラ
イトバルブ及び前記ライトバルブが固着された背板を有
し、前記１／４波長位相板ホルダーは先端部を折り曲げ
た突起部を有し、該突起部の先端折り曲げ部は前記光遮
光部材に形成された穴部を通して前記遮光部材の背部に
突出しており、前記遮光部材は、前記第１ライトバル
（請求項８）」を提供する。第９に「光源と、偏光ビー
ムスプリッタと、Ｒ（赤）光及びＧ（緑）光及びＢ
（青）光に分解する色分解光学系と前記各色光を色合成
する合成光学系とを兼用する複数のプリズムからなる色
分解合成光学系と、前記各色光毎に配置した反射型ライ
トバルブと、前記色分解合成プリズムと各色光用ライト
バルブとの間に配置した１／４波長位相板と、投射レン
ズを有する投射型表示装置において、前記ライトバルブ
と、１／４波長位相板及び前記複数のプリズムは一体化
され、該一体化は、前記プリズムに取り付けた第１ライ
トバルブ取り付け部材と前記１／４波長位相板を一体化
した部材とを取り付けることにより行い、前記１／４波
長位相板とライトバルブの一体化部材は、カバー部材
と、１／４波長位相板ホルダーと、前記１／４波長板
と、光遮光部材と、前記ライトバルブと、背板とから構
成され、前記１／４波長位相板ホルダーは先端部を折り
曲げた突起部を有し、前記光遮光部材を前記光遮光部材
に形成された穴部を通して前記光遮光部の背部に突出さ
せ、前記光遮光部材は前記第１ライトバルブ取り付け部
材に対する取り付け部材を兼用することを特徴とする投
射型表示装置（請求項９）」を提供する。第１０に「請
求項８又は９に記載の投射型表示装置を用い、前記１／
４波長位相板を光軸を中心に回転させて投射像のコント
ラストを調整する方法において、前記光遮光部材の背部
に突出させた前記１／４波長位相ホルダーの先端部を前
記穴部に沿って移動させることにより前記１／４波長位
相板を回転させ、投射像のコントラストを調節する方法
（請求項１０）を提供する」Accordingly, the present invention firstly provides a light source, a color separation optical system for separating R (red) light, G (green) light and B (blue) light, and each color light. A polarizing beam splitter arranged for each color, a reflective light valve arranged for each color light, a quarter-wave phase plate arranged between the polarization beam splitter for each color light and the light valve for each color light, In a projection type display device having a color combining optical system and a projection lens, the light valve, the quarter-wave phase plate, and the polarization beam splitter are integrated, and the integration is performed by attaching a light beam to the polarization beam splitter. (1) The mounting is performed by attaching an integrated member and a member in which the quarter-wave phase plate and the light valve are integrated, and an integrated member that integrates the quarter-wave phase plate and the light valve includes a cover. And the member, and a 1/4 wave plate holders, secured to 該記 quarter wave plate holder 1/4
A wavelength phase plate, a light shielding plate, the light valve, and a back plate to which the light valve is fixed; the quarter-wave phase plate holder having a protrusion having a screw portion; Has an arc-shaped hole, and the 1/4 wavelength phase plate holder, to which the 1/4 wavelength phase plate is attached, is provided with a 1/4 wavelength phase plate and a projection from the opening of the cover member in the cover member. The cover member is projected out of the cover member, the holder member is screwed and fixed to the cover member with a screw through a projection screw portion and an arc-shaped hole of the cover member, and the light valve, the quarter-wave phase plate, The configuration in which the polarization beam splitter is integrated includes a first attachment member attached to the polarization beam splitter,
A projection type display device (Claim 1), wherein a wavelength phase plate and the light shielding plate in an integrated member of the light valve are attached. Second, "light source, polarizing beam splitter, R (red) light, G (green) light and B
(Blue) a color separation / synthesis optical system composed of a plurality of prisms which also serves as a color separation optical system for separating light into light and a synthesis optical system for color-synthesizing the respective color lights, and a reflection type light valve arranged for each color light. A projection type display device having a 波長 wavelength phase plate disposed between the color separation / synthesis prism and each color light light valve, and a projection type display device having a projection lens; The prism is integrated, and the integration is performed by attaching a first light valve attachment member attached to the prism and a member obtained by integrating the 1/4 wavelength phase plate, thereby obtaining the 1/4 wavelength phase plate. And a light valve integrated member, a cover member, a 波長 wavelength plate holder, a 波長 wavelength phase plate fixed to the １ ／ wavelength plate holder, a light shielding plate,
A light valve, comprising a back plate to which the light valve is fixed, wherein the quarter-wave phase plate holder has a projection with a screw portion, the cover member has an arc-shaped hole, The quarter-wave phase plate holder with the quarter-wave phase plate attached thereto has a configuration in which a projection projects out of the cover member through the opening of the cover member into the cover member together with the quarter-wave phase plate. The cover member is screwed and fixed to the cover member with screws through the protrusion screw portion and the arc-shaped hole of the cover member, and the light valve, the quarter-wave phase plate, and the polarization beam splitter are disposed. The integration is performed by attaching a first attachment member attached to the polarizing beam splitter, the 遮光 wavelength phase plate, and the light shielding plate in an integrated member of the light valve. Morphism display device provides (claim 2) ". Third, "the light source, the polarizing beam splitter, and R
A color separation / synthesis optical system composed of a plurality of prisms which also serves as a color separation optical system for separating (red) light, G (green) light and B (blue) light into light, and a synthesis optical system for color combining the respective color lights. A reflection type light valve disposed for each color light, a 波長 wavelength phase plate disposed between the color separation / combination prism and the light valve for each color light, and a projection display device having a projection lens, A light valve, a 1/4 wavelength phase plate and the plurality of prisms are integrated, and the integration is performed by integrating a first light valve mounting member attached to the prism and a member integrating the 1/4 wavelength phase plate. The integrated member of the 1/4 wavelength phase plate and the light valve is provided with a cover member, a 1/4 wavelength phase plate holder, and a 1/4 wavelength plate fixed to the 1/4 wavelength plate holder.
A four-wavelength phase plate, a light-shielding plate, a light valve, and a back plate to which the light valve is fixed; the quarter-wave phase plate holder having a protrusion having a screw portion; Has an arc-shaped hole, and the quarter-wave phase plate holder to which the quarter-wave phase plate is attached, together with the quarter-wave phase plate, has a projection formed in the cover member from an opening of the cover member. Is disposed in a configuration protruding out of the cover member. The cover member is screwed and fixed to the holder member through a protrusion screw portion and an arc-shaped hole of the cover member. The integration of the quarter-wave phase plate and the polarizing beam splitter includes a first mounting member attached to the polarizing beam splitter, and the cover member in the integrated member of the quarter-wave phase plate and the light valve. Mounting to provide a projection type display apparatus (claim 3), "which is characterized in that it. Fourthly, "the quarter-wave phase plate holder and the cover member are arranged such that a screw fitted into an arc hole of the cover portion is screwed along the hole portion before screwing the holder member to a thread portion at the tip end. 4. The method of claim 1, wherein the て wavelength phase plate is rotated to adjust the contrast of the projected image. Fifth, a “light source, a color separation optical system that separates R (red) light, G (green) light, and B (blue) light, and a polarization beam splitter disposed for each color light are provided. A reflective light valve disposed for each color light, a quarter-wave phase plate disposed between the polarization beam splitter for each color light and the light valve for each color light, a color combining optical system, and a projection lens In the projection type display device having And Lube the quarter wave plate and the polarization beam splitter are integrated, the integral is the first light valve mounting member attached to the light valve 1
This is performed by attaching a member having a ／ wavelength phase plate integrated therein, and the integrated member for integrating the １ ／ wavelength phase plate and the light valve includes a cover member, a 波長 wavelength phase plate holder, A quarter-wave phase plate fixed to the quarter-wave plate holder, a light shielding plate, the light valve, and a back plate to which the light valve is fixed;
The quarter-wave phase plate holder has a projection with a tip bent, the light shielding member has an arc-shaped hole, and the quarter-wave phase plate holder to which the quarter-wave phase plate is attached is: The １ ／ wavelength phase plate and the cover member have a configuration in which a projection is projected from the opening of the cover member to the outside of the cover member through the opening of the cover member. The light valve, the 波長 wavelength phase plate, and the polarization beam splitter are integrated into the arc-shaped hole, and the first attachment member attached to the polarization beam splitter includes: A projection type display device (Claim 5) comprising a four-wavelength phase plate and the light shielding plate in an integrated member of the light valve. Sixth, "light source, polarizing beam splitter, R (red) light and G (green) light"
A color separation / synthesis optical system composed of a plurality of prisms which also serves as a color separation optical system for separating light into light and B (blue) light and a synthesis optical system for color-synthesizing the respective color lights, and a reflection type arranged for each of the color lights A light valve, a quarter-wave phase plate disposed between the color separation / synthesis prism and the light valve for each color light,
In a projection type display device having a projection lens, the light valve, the quarter-wave phase plate and the plurality of prisms are integrated, and the integration is performed by a first light valve mounting member mounted on the prism and the first light valve mounting member. It is performed by attaching a member that integrates a 1/4 wavelength phase plate,
The integrated member of the 1/4 wavelength phase plate and the light valve,
A cover member, a quarter-wave phase plate holder,
The 1/4 wavelength phase plate holder includes a four-wavelength plate, a light-shielding member, the light valve, and a back plate. And the quarter-wave phase plate holder to which the quarter-wave phase plate is attached, together with the quarter-wave phase plate, causes a projection to protrude outside the cover member from an opening in the cover member, The tip bending member of the protrusion is inserted into the arc-shaped hole, and the light valve is integrated with the quarter-wave phase plate and the polarizing beam splitter by a first mounting member mounted on the polarizing beam splitter. When,
A projection type display device (Claim 6), wherein the １ ／ wavelength phase plate and the light blocking member in the integrated member of the light valve are attached. Seventhly, "before inserting the bent end of the projection of the quarter-wave plate holder member into the arc-shaped hole of the light-shielding member, move it along the arc-shaped hole to move the quarter-wave phase. A method for adjusting the contrast of a projected image of a projection display device according to claim 6, wherein the plate is rotated to adjust the contrast of the projected image (claim 7). Eighth, “a light source, a color separation optical system that separates R (red) light, G (green) light, and B (blue) light, a polarizing beam splitter disposed for each color light, A reflective light valve disposed, a quarter-wave phase plate disposed between the polarization beam splitter for each color light and the light valve for each color light,
In a projection display apparatus having a color combining optical system and a projection lens, the light valve, the quarter-wave phase plate, and the polarization beam splitter are integrated, and the integration is performed by a first light attached to the light valve. This is performed by attaching a valve mounting member and a member obtained by integrating the quarter-wave phase plate, and the integrated member integrating the quarter-wave phase plate and the light valve includes a cover member and a light valve.
A quarter-wave phase plate holder, a quarter-wave phase plate and a light shielding plate fixed to the quarter-wave plate holder, the light valve, and a back plate to which the light valve is fixed; The four-wavelength phase plate holder has a protrusion with a bent front end, and the bent front end of the protrusion projects through a hole formed in the light-blocking member to the back of the light-blocking member. , The first light valve (claim 8). " Ninth, “light source, polarizing beam splitter, R (red) light, G (green) light and B
(Blue) a color separation / synthesis optical system composed of a plurality of prisms which also serves as a color separation optical system for separating light into light and a synthesis optical system for color-synthesizing the respective color lights, and a reflection type light valve arranged for each color light. A projection type display device having a 波長 wavelength phase plate disposed between the color separation / synthesis prism and each color light light valve, and a projection type display device having a projection lens; The prism is integrated, and the integration is performed by attaching a first light valve attachment member attached to the prism and a member obtained by integrating the 1/4 wavelength phase plate, thereby obtaining the 1/4 wavelength phase plate. The integrated member of the light valve and the light valve includes a cover member, a quarter-wave phase plate holder, the quarter-wave plate, a light shielding member, the light valve, and a back plate. 4 waves The phase plate holder has a protruding portion having a bent front end portion, and the light shielding member is protruded to the back of the light shielding portion through a hole formed in the light shielding member, and the light shielding member is the first light. A projection type display device (claim 9), which also serves as an attachment member for the valve attachment member. Tenthly, “using the projection type display device according to claim 8 or 9,
In the method of adjusting the contrast of the projected image by rotating the four-wavelength phase plate around the optical axis, the tip of the quarter-wave phase holder protruding from the back of the light shielding member is arranged along the hole. A method (claim 10) for adjusting the contrast of the projected image by rotating the quarter-wave phase plate by moving it is provided.

【００１１】[0011]

【発明の実施の形態】（投射型表示装置の第１実施の形
態）本発明の実施の第１の実施の形態に係る投射型表示
装置の構成について説明する。図４は、その基本構成の
概略図を示している。この構成から説明する。ランプ１
ａならびに放物面形状を有する凹面鏡１ｂとから構成さ
れる光源１から射出された略平行光束を有する光源光
は、Ｒ（赤）光、Ｇ（緑）光反射特性を有するダイクロ
イックミラー２ＲＧと、Ｂ（青）光反射ダイクロイック
特性を有するダイクロイックミラー２Ｂとを互いに直交
して配置したクロスダイクロイックミラー２に入射す
る。入射光は、互いに反対方向に進行する方向で、入射
光軸と直交する方向に進行するＢ光と、Ｒ光とＧ光の混
合光とに色分解される。DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of Projection Display Device) The configuration of a projection display device according to a first embodiment of the present invention will be described. FIG. 4 shows a schematic diagram of the basic configuration. The configuration will be described. Lamp 1
a and a dichroic mirror 2RG having R (red) light and G (green) light reflection characteristics, the light having a substantially parallel light flux emitted from the light source 1 composed of a concave mirror 1b having a parabolic shape. A dichroic mirror 2B having a B (blue) light reflection dichroic characteristic is incident on a cross dichroic mirror 2 arranged orthogonally to each other. The incident light is color-separated into B light traveling in a direction orthogonal to the incident optical axis and a mixed light of R light and G light in directions opposite to each other.

【００１２】Ｂ光は折り曲げミラー５によって進行方向
を直角に変えて進行し、Ｂ光用偏光ビームスプリッタ６
Ｂに入射される。一方、前記Ｒ光とＧ光の混合光は折り
曲げミラー４によって進行方向を換えて進行し、Ｇ光反
射特性を有するダイクロイックミラー３Ｇに入射され、
当該ミラーによって反射され、進行方向を変えて進行す
るＧ光とそのまま進行するＲ光とに色分解される。The B light travels by changing the traveling direction to a right angle by the bending mirror 5, and the polarization beam splitter 6 for the B light
B is incident. On the other hand, the mixed light of the R light and the G light travels by changing the traveling direction by the bending mirror 4 and is incident on a dichroic mirror 3G having a G light reflection characteristic.
The light is reflected by the mirror and color-separated into G light traveling in a changed traveling direction and R light traveling as it is.

【００１３】このように、ダイクロイックミラー２Ｒ
Ｇ、同ミラー２Ｂ、同ミラー３Ｇならびに折り曲げミラ
ー４、５は光源光をＲ光、Ｇ光ならびにＢ光に分解する
色分解光学系を構成する。前記Ｒ光とＧ光はそれぞれ偏
光ビームスプリッタ６Ｒ、偏光ビームスプリッタ６Ｇに
入射される。As described above, the dichroic mirror 2R
The G, the mirror 2B, the mirror 3G, and the bending mirrors 4 and 5 constitute a color separation optical system that separates the light source light into R light, G light, and B light. The R light and the G light are incident on the polarization beam splitter 6R and the polarization beam splitter 6G, respectively.

【００１４】なお、光源１とクロスダイクロイックミラ
ー２の間の光路中に複数のレンズを平面的に配列した第
１のレンズ板と同様の第２のレンズ板を配置したいわゆ
るフライアイインテグレータとこのインテグレータの射
出面に配置された複数の偏光ビームスプリッタをアレイ
状に形成した偏光ビームスプリッタアレイとこの偏光ビ
ームスプリッタアレイの所定偏光ビームスプリッタの射
出面に配置した１／２波長位相板とから構成される偏光
照明装置を配置することにより、光源光を単一な偏光
（本実施形態ではＳ偏光）に変換して偏光ビームスプリ
ッタ２に入射させる構成としてもよい。その際には、入
射光は大部分がＳ偏光であり、一部Ｐ偏光が混在するこ
とになり、Ｐ偏光が不要光として各色光用偏光ビームス
プリッタにて廃棄される。この偏光装置を採用すること
により、ほとんどの光源光が単一な偏光（本実施形態で
はＳ偏光）に変換されることから、各色用ライトバルブ
への高輝度照明が可能となる。A so-called fly-eye integrator having a second lens plate similar to the first lens plate having a plurality of lenses arranged in a plane in an optical path between the light source 1 and the cross dichroic mirror 2 and this integrator A plurality of polarizing beam splitters arranged on the exit surface of the polarizing beam splitter array formed in an array, and a half-wave phase plate disposed on the emitting surface of a predetermined polarizing beam splitter of the polarizing beam splitter array. By arranging a polarized light illuminating device, the configuration may be such that light from the light source is converted into single polarized light (S-polarized light in the present embodiment) and is incident on the polarization beam splitter 2. At that time, most of the incident light is S-polarized light, and some P-polarized light is mixed. The P-polarized light is discarded as unnecessary light by the polarization beam splitter for each color light. By employing this polarizer, most of the light from the light source is converted into a single polarized light (S-polarized light in the present embodiment), so that a high-brightness illumination to the light valve for each color becomes possible.

【００１５】各色用偏光ビームスプリッタ６Ｂ、６Ｇ、
６Ｒに入射されたＢ光、Ｇ光、Ｒ光はそれぞれ各偏光ビ
ームスプリッタの偏光分離部によって偏光分離作用を受
け、当該偏光分離部を反射するＳ偏光と、透過して廃棄
されるＰ偏光とに偏光分離作用をうける。各色用偏光ビ
ームスプリッタによって反射された各色Ｓ偏光は、１／
４波長位相板９Ｂ、９Ｇ、９Ｒを経て、それぞれの偏光
ビームスプリッタ射出面近傍に配置された各色用反射型
液晶ライトバルブ７Ｂ、７Ｇ、７Ｒに入射される。各色
用ライトバルブにおいて各色光色信号によって変調作用
を受けて反射射出された光は再度各色光用偏光ビームス
プリッタに入射され、変調光のみを偏光分離部を透過す
るＰ偏光として取り出し（検光し）、色合成光学系を構
成するクロスダイクロイックプリズム８に各色光とも異
なる入射面から入射される。The polarization beam splitters 6B, 6G for each color,
The B light, the G light, and the R light incident on the 6R are respectively subjected to the polarization splitting action by the polarization splitters of the respective polarizing beam splitters, and the S polarized light that reflects the polarized light splitters and the P polarized light that is transmitted and discarded. Undergoes a polarization splitting action. The S-polarized light of each color reflected by the polarization beam splitter for each color is 1 /
After passing through the four-wavelength phase plates 9B, 9G, and 9R, the light enters the reflective liquid crystal light valves 7B, 7G, and 7R for the respective colors arranged near the exit surfaces of the respective polarization beam splitters. The light reflected and emitted by the light valve for each color after being modulated by the color signal of each color is again incident on the polarization beam splitter for each color, and only the modulated light is taken out as P-polarized light passing through the polarization separation unit (detection of the light). ), Each color light is incident on the cross dichroic prism 8 constituting the color combining optical system from a different incident surface.

【００１６】上記１／４波長位相板９Ｂ、９Ｇ、９Ｒ
は、光学軸（進相軸）が図４において光軸に対して垂直
であって、かつ、紙面に対し平行または垂直に配置され
ることが必要である。ライトバルブに対して光軸に対し
傾いた光線の偏光方向が、検光作用を与える各色光用偏
光ビームスプリッタの偏光分離部に対して最適な方向の
振動方向に変換させるがためである。The quarter-wave phase plates 9B, 9G, 9R
Requires that the optical axis (advance axis) be perpendicular to the optical axis in FIG. 4 and be arranged parallel or perpendicular to the paper surface. This is because the polarization direction of the light beam that is inclined with respect to the optical axis with respect to the light valve is converted into the vibration direction that is optimal for the polarization beam splitter of the polarization beam splitter for each color light that provides the light analysis function.

【００１７】以上の様に各色光毎に配置した偏光ビーム
スプリッタ６Ｒ、６Ｇ、６Ｂはそれぞれの色光において
偏光分離光学系と検光光学系を兼用する機能を有する。
クロスダイクロイックプリズム８は内部にＲ光反射ダイ
クロイック８ＲとＢ光反射ダイクロイック膜８Ｂとが互
いに直交した構成を有する複合プリズムであって、入射
したＲ光はダイクロイック膜８Ｒに、入射したＢ光はダ
イクロイック膜８Ｂに、入射したＧ光は両膜を透過して
そのまま進行して色合成が達成されて当該プリズムを射
出し、投射レンズ１０に入射され図示しないスクリーン
上にコントラストが良好なフルカラー像として投射され
る。As described above, the polarization beam splitters 6R, 6G, and 6B arranged for each color light have a function of using the polarization separation optical system and the analysis optical system for each color light.
The cross dichroic prism 8 is a composite prism having a configuration in which an R light reflecting dichroic 8R and a B light reflecting dichroic film 8B are orthogonal to each other. 8B, the incident G light passes through both films and proceeds as it is to achieve color synthesis, exits the prism, enters the projection lens 10 and is projected as a full-color image with good contrast on a screen (not shown). You.

【００１８】なお、本実施形態における投射型表示装置
の構成では各色ライトバルブを射出した光のうちの変調
光はすべてＰ偏光であり、クロスダイクロイックプリズ
ム８にはすべてＰ偏光が入射される構成であるが、すべ
てＰ偏光にする必要は必ずしもなく、Ｒ光、Ｂ光につい
てはＳ偏光で入射させる構成としてもよい。その際に
は、偏光ビームスプリッタとクロスダイクロイックプリ
ズムの間の光路中に１／２波長位相板を配置して検光光
をＳ偏光に変換させる構成とする事により可能となる。
（投射型表示装置の第２実施の形態）本発明の第２実施
の形態に係る投射型表示装置の基本構成について説明す
る。図６は、投射型表示装置の基本構成を示す説明図で
あり、前記第１実施の形態の投射型表示装置の構成と異
なる構成を有している。In the configuration of the projection type display device according to the present embodiment, all of the modulated light out of the light emitted from the light valves of each color is P-polarized light, and all the P-polarized light enters the cross dichroic prism 8. However, it is not always necessary to use P-polarized light, and R light and B light may be incident as S-polarized light. In that case, it becomes possible by arranging a half-wave phase plate in the optical path between the polarizing beam splitter and the cross dichroic prism to convert the analysis light into S-polarized light.
(Second Embodiment of Projection Display Device) A basic configuration of a projection display device according to a second embodiment of the present invention will be described. FIG. 6 is an explanatory diagram showing a basic configuration of the projection type display device, and has a configuration different from the configuration of the projection type display device of the first embodiment.

【００１９】ランプ１１ａならびに放物面鏡１１ｂから
構成される光源１１から射出された略平行光束の光源光
は、偏光分離光学系を構成する偏光ビームスプリッタ１
２に入射され、偏光分離部１２ｐによって反射されるＳ
偏光と透過するＰ偏光とに偏光分離される。このうちＰ
偏光は不要光として廃棄される。なお、第１実施の形態
と同様に、光源１１と偏光ビームスプリッタ１２の間の
光路中に複数のレンズを平面的に配列した第１のレンズ
板と同様な第２のレンズ板を配置したいわゆるフライア
イインテグレータとこのインテグレータの射出面に配置
された複数の偏光ビームスプリッタをアレイ状に形成し
た偏光ビームスプリッタアレイとこの偏光ビームスプリ
ッタアレイの所定偏光ビームスプリッタの射出面に配置
した１／２波長位相板とから構成される偏光照明装置を
配置することにより、光源光を単一な偏光（本実施形態
ではＳ偏光）に変換して偏光ビームスプリッタ１２に入
射させる構成としてもよい。その際には、入射光は大部
分がＳ偏光であり、一部Ｐ偏光が混在することになり、
当該Ｐ偏光が不要光として廃棄される。A substantially parallel light beam emitted from a light source 11 composed of a lamp 11a and a parabolic mirror 11b is converted into a polarization beam splitter 1 constituting a polarization separation optical system.
2 and is reflected by the polarization separation unit 12p.
The light is separated into polarized light and transmitted P-polarized light. P
The polarized light is discarded as unnecessary light. Note that, similarly to the first embodiment, a so-called second lens plate similar to the first lens plate in which a plurality of lenses are arranged in a plane in the optical path between the light source 11 and the polarizing beam splitter 12 is provided. A fly-eye integrator and a polarization beam splitter array formed by arraying a plurality of polarization beam splitters disposed on the exit surface of the integrator, and a 1/2 wavelength phase disposed on the exit surface of a predetermined polarization beam splitter of the polarization beam splitter array By arranging a polarized light illuminating device composed of a plate and a plate, the light source light may be converted into a single polarized light (S-polarized light in the present embodiment) and incident on the polarization beam splitter 12. At that time, most of the incident light is S-polarized light, and some P-polarized light is mixed,
The P-polarized light is discarded as unnecessary light.

【００２０】偏光ビームスプリッタ１２で反射射出した
Ｓ偏光は、プリズム１３、プリズム１４ならびにプリズ
ム１５から構成される色分解合成複合プりズムに空隙を
経てプリズム１３の入射面１３ａから入射される。上記
色分解合成複合プリズムを構成する前記プリズム１３、
１４、１５は、それぞれ実質的に三角柱形状プリズムで
ある。色分解合成複合プリズムを構成するプリズム１３
の１３ａ面から入射したＳ偏光は、そのまま進行し、１
ｂ面に形成されたＢ光反射、Ｒ、Ｇ光透過特性を有する
ダイクロイック膜によって、Ｂ光が反射、Ｒ、Ｇ光はそ
のまま透過進行する。Ｂ光はプリズム１３中を進行し
て、１３ａ面にて全反射作用を受けてさらに進行し、１
３ｃ面から射出される。The S-polarized light reflected and emitted by the polarization beam splitter 12 enters the color separation / synthesis composite prism composed of the prism 13, the prism 14, and the prism 15 from the entrance surface 13a of the prism 13 via a gap. The prism 13, which constitutes the color separation / synthesis composite prism,
Reference numerals 14 and 15 are substantially triangular prism-shaped prisms. Prism 13 constituting color separation / synthesis composite prism
S-polarized light incident from the surface 13a of FIG.
The B light is reflected by the dichroic film having the B light reflection, R, and G light transmission characteristics formed on the b surface, and the R and G lights pass through as it is. The B light travels through the prism 13 and undergoes a total reflection on the surface 13a to further travel, and
It is emitted from the 3c plane.

【００２１】プリズム１３の１３ｂ面から射出したＲ、
Ｇ光は、空隙を隔てて配置されるプリズム１４に１４ａ
面から入射される。プリズム１４とプリズム１５は、略
同一形状の三角プリズムであり、プリズム１４の１４ｂ
面とプリズム１５の１５ａ面とをＲ光反射、Ｇ光透過特
性を有するダイクロイック膜を挟んだ構成にて接着一体
化されている。本形態では、１４ｂ面に上記ダイクロイ
ック膜を形成し、当該膜と１５ａ面とを接着剤にて接着
一体化する構成を採用した。なお、プリズム１４とプリ
ズム１５は必ずしも同じ形状にする必要はない。R emitted from the 13b surface of the prism 13,
The G light is applied to the prism 14 that is disposed with the air gap therebetween.
Incident from the surface. The prism 14 and the prism 15 are triangular prisms having substantially the same shape.
The surface and the 15a surface of the prism 15 are bonded and integrated in a configuration in which a dichroic film having R light reflection and G light transmission characteristics is sandwiched. In the present embodiment, a configuration is adopted in which the dichroic film is formed on the surface 14b, and the film and the surface 15a are bonded and integrated with an adhesive. The prism 14 and the prism 15 do not necessarily have to have the same shape.

【００２２】空隙を経てプリズム１４に１４ａ面から入
射したＲ、Ｇ光はそのまま進行し、１４ｂ面に形成され
た前記ダイクロイック膜にてＲ光が反射、Ｇ光は透過し
てプリズム１５に１５ａ面から入射する。Ｒ光はそのま
ま進行し、１４ａ面にて全反射作用をうけてさらに進行
し、１４ｃ面から射出される。Ｇ光はプリズム１５中を
進行し、１５ｂ面にて全反射作用をうけてさらに進行
し、１５ｃ面から射出される。The R and G light incident on the prism 14 from the surface 14a via the air gap travels as it is, and the R light is reflected by the dichroic film formed on the surface 14b, and the G light is transmitted and the prism 15 is transmitted to the prism 15a surface. Incident from The R light travels as it is, undergoes total reflection on the surface 14a, further travels, and is emitted from the surface 14c. The G light travels through the prism 15, undergoes total reflection on the surface 15b, further travels, and is emitted from the surface 15c.

【００２３】プリズム１３の１３ｃ面から射出されたＢ
光、プリズム１４の１４ｃ面から射出されたＲ光ならび
に、プリズム１５の１５ｃ面から射出されたＧ光はそれ
ぞれ射出面近傍に配置された１／４波長位相板１８Ｂ、
１８Ｒ、１８Ｇを経て反射型ライトバルブ１６Ｂ、１６
Ｒならびに１６Ｇに照明光として入射される。各色光用
のライトバルブに入射した光は、各色に色信号に基づい
て変調作用を受けて、変調光に相当するＰ偏光と、非変
調光の相当するＳ偏光の混合光としてそれぞれ反射射出
される。B emitted from the 13c surface of the prism 13
The light, the R light emitted from the 14c surface of the prism 14 and the G light emitted from the 15c surface of the prism 15 are each a quarter-wave phase plate 18B disposed near the emission surface.
After passing through 18R and 18G, reflection type light valves 16B and 16
R and 16G are incident as illumination light. The light incident on the light valve for each color light undergoes a modulating action based on the color signal for each color, and is reflected and emitted as a mixed light of P-polarized light corresponding to the modulated light and S-polarized light corresponding to the unmodulated light. You.

【００２４】各ライトバルブを反射射出した光は、入射
光軸と逆方向にそれぞれ進行し、各１／４波長位相板を
経て、それぞれプリズム１３の１３ｃ面、プリズム１４
の１４ｃ面、プリズム１５の１５ｃ面から入射、プリズ
ム３の１３ａ面から色合成光として射出され、偏光ビー
ムスプリッタ１２に入射、偏光分離部１２ｐによって変
調光たるＰ偏光は透過光として、非変調光たるＳ偏光は
反射光として分離され（すなわち検光され）、投射レン
ズ１７に入射、図示しないスクリーンにフルカラー像と
して投射される。なお、前記偏光ビームスプリッタの偏
光分離１２ｐを反射した非偏光に相当するＳ偏光は不要
光として光源方向に進行し、廃棄される。The light reflected and emitted from each light valve travels in the direction opposite to the incident optical axis, passes through each quarter-wave phase plate, and passes through the 13c surface of the prism 13 and the prism 14 respectively.
14c surface, 15c surface of the prism 15, incident from the 13a surface of the prism 3, emitted as color synthesized light, incident on the polarization beam splitter 12, and P-polarized light, which is modulated light by the polarization separation unit 12p, as transmitted light, and unmodulated light The S-polarized light is separated (that is, analyzed) as reflected light, enters the projection lens 17, and is projected as a full-color image on a screen (not shown). The S-polarized light corresponding to the non-polarized light reflected by the polarization beam splitter 12p of the polarization beam splitter travels toward the light source as unnecessary light and is discarded.

【００２５】本実施形態の１／４波長位相板１８Ｂ、１
８Ｒ、１８Ｇの光軸の方向は前実施形態とその配置方向
が異なる。本実施形態の投射型表示装置においては、光
源光であって、偏光ビームスプリッタにて偏光分離され
た直線偏光光（実施形態ではＳ偏光）の各色光成分は各
プリズムを射出するまでに単数または複数のダイクロイ
ック膜ならびに全反射膜との相互作用をおこなう。この
際、偏光状態が変化することが知られており、ライトバ
ルブ上で紙面に対して平行または垂直な光軸を揺する楕
円偏光となるようにする。こうすることにより、ライト
バルブにて反射された各色光は全反射膜ならびにダイク
ロイック膜にて逆方向の進行による相互作用を行って、
偏光ビームスプリッタ１２の偏光分離部に対して偏光分
離（検光）に最適な偏光状態を形成できる。上記のよう
に、各色光ともダイクロイック膜ならびに全反射膜にて
上記の偏光報償を達成することが本来望ましいが、設計
上困難な場合もあるし、膜の作製上、偏光状態のばらつ
きが発生したりする。本発明実施形態においては１／４
波長位相板を配置し、当該波長位相板を光軸を光軸を中
心にして回転して、ダイクロイック膜ならびに全反射膜
による偏光補償の補助を行い、理想的な偏光状態にてラ
イトバルブに入射させ、当該入射光を反射させて、前記
全反射膜ならびにダイクロイック膜を経由して偏光ビー
ムスプリッタ１２の偏光分離部１２ｐによる偏光分離
（検光）にたいして最適な振動方向有する偏光光として
入射させることを可能とする。The quarter-wave phase plate 18B, 1
The directions of the optical axes of 8R and 18G are different from the previous embodiment in the arrangement direction. In the projection display device of the present embodiment, each color light component of the linearly polarized light (S-polarized light in the embodiment), which is the light source light and is polarization-separated by the polarization beam splitter, is singular or Interacts with multiple dichroic films and total reflection films. At this time, it is known that the polarization state changes, and the light is made to be elliptically polarized light which oscillates the optical axis parallel or perpendicular to the paper on the light valve. By doing so, each color light reflected by the light valve interacts with the total reflection film and the dichroic film by proceeding in the opposite direction,
An optimum polarization state for polarization separation (analysis) can be formed in the polarization separation section of the polarization beam splitter 12. As described above, it is originally desirable to achieve the above-described polarization compensation with the dichroic film and the total reflection film for each color light, but there are cases where it is difficult to design, and in the production of the film, variation in the polarization state occurs. Or In the embodiment of the present invention, 1/4
A wavelength phase plate is arranged, and the wavelength phase plate is rotated around the optical axis to assist the polarization compensation by the dichroic film and the total reflection film, and is incident on the light valve in an ideal polarization state. Then, the incident light is reflected to be incident as polarized light having an optimal vibration direction for polarization separation (analysis) by the polarization separation unit 12p of the polarization beam splitter 12 via the total reflection film and the dichroic film. Make it possible.

【００２６】すなわち、各色光用の１／４波長位相板の
光軸の方向はそれぞれの色光において同じ補償ではな
く、各色光によって経由するダイクロイック膜ならびに
全反射膜がそれぞれ異なるために、偏光補償のために補
助する量が異なり、その回転量（光軸の位置）はそれぞ
れ異なることになる。なお、上記偏光補償を担保するた
めにも、偏光ビームスプリッタ１２ならびにプリズム１
３〜１５を構成する透明光学ガラス部材は光弾性定数の
値の絶対値が小さい材料（１．５×１０-8ｃｍ2／Ｎ以
下の値）を使用することが望ましい。当該ガラス部材を
通過する光の偏光状態を変化させないがためである。 （第３実施の形態）本発明の第３実施の形態を示す構成
図を一部分解した構成図として図１に示す。That is, the direction of the optical axis of the 1/4 wavelength phase plate for each color light is not the same compensation for each color light, and the dichroic film and the total reflection film which pass through each color light are different from each other. Therefore, the amount to be assisted is different, and the amount of rotation (position of the optical axis) is different. In order to secure the above-mentioned polarization compensation, the polarization beam splitter 12 and the prism 1 are also required.
It is desirable to use a material having a small absolute value of the photoelastic constant (a value of 1.5 × 10 −8 cm 2 / N or less) for the transparent optical glass members constituting 3 to 15. This is because the polarization state of light passing through the glass member is not changed. (Third Embodiment) FIG. 1 is a partial exploded view of a configuration diagram showing a third embodiment of the present invention.

【００２７】本実施の形態にて採用した投射型表示装置
の構成は、図４に記載した投射型表示装置のそれであ
る。なお、図４において記載の構成図のうちの光源、色
分解光学系は本発明の趣旨には関係しないので、図１に
おいて既に形成されているものとしてそれらの図示なら
びに説明は省略する。本実施の形態においては、図４の
上記投射型表示装置の第１実施の形態で記載した投射型
表示装置の構成において、ライトバルブ７Ｒ、７Ｇ、７
Ｂ、偏光ビームスプリッタ６Ｒ、６Ｇ、６Ｂ、クロスダ
イクロイックプリズム８ならびに投射レンズ１０をマウ
ント部材１０１を使用して一体化させる構成とした。The configuration of the projection display device employed in this embodiment is that of the projection display device shown in FIG. Since the light source and the color separation optical system in the configuration diagram shown in FIG. 4 are not related to the gist of the present invention, their illustration and description are omitted because they are already formed in FIG. In the present embodiment, in the configuration of the projection display device described in the first embodiment of the projection display device of FIG. 4, the light valves 7R, 7G, 7
B, the polarizing beam splitters 6R, 6G, 6B, the cross dichroic prism 8, and the projection lens 10 are integrated using a mount member 101.

【００２８】まず、マウント部材１０１に対して、投射
レンズ１０を取り付ける。マウント部材１０１は投射装
置筐体の床部材（図示せず）にたいして、図示のように
ネジ部材にて前もって取り付けておく。マウント部材の
略中央部には当該部材の厚み方向に、投射レンズ１０の
一部が嵌入するのと、変調光が当該レンズに入射される
のを担保するための貫通穴が形成されている。当該穴に
垂直な両面の穴の外周部には投射レンズのフランジ部を
螺着するためのネジが、他方には後述の一体化部材を取
り付けるためのネジが形成されている。First, the projection lens 10 is attached to the mount member 101. The mount member 101 is attached in advance to a floor member (not shown) of the projection device housing with a screw member as illustrated. At a substantially central portion of the mount member, a through hole is formed in a thickness direction of the mount member so as to ensure that a part of the projection lens 10 is fitted and that modulated light is incident on the lens. Screws for screwing the flange portion of the projection lens are formed on the outer peripheral portions of the holes on both sides perpendicular to the holes, and screws for attaching an integrated member described later are formed on the other side.

【００２９】投射レンズ１０はそのフランジより後方を
穴に嵌入させ、フランジ部を前記ネジにネジ部材にて螺
着させてマウント部材１０１に固定する。次に、上記の
一体化のうちの、クロスダイクロイックプリズム８と各
色光用偏光ビームスプリッタ６Ｒ，６Ｇ，６Ｂはそれぞ
れ透明ガラス板部材１０３Ｒ、１０３Ｇ、１０３Ｂを接
着剤にて接着させることにより固着させ一体化させる構
成とした。これは一体化の目的の他に光路長を各色光毎
に調節する機能も有する。The projection lens 10 is fitted into a hole behind the flange, and the flange portion is screwed to the screw with a screw member to be fixed to the mount member 101. Next, the cross dichroic prism 8 and the polarization beam splitters 6R, 6G, 6B for the respective color lights of the above-mentioned integration are fixed by bonding the transparent glass plate members 103R, 103G, 103B with an adhesive, respectively. Configuration. This has a function of adjusting the optical path length for each color light in addition to the purpose of integration.

【００３０】次に、前述のクロスダイクロイックプリズ
ム８の上下面に取り付け部材１０２ａならびに同部材１
０２ｂ（図示せず）をそれぞれ接着剤にて接着し、当該
両部材と前記一体化部材のさらなる一体化部材を形成す
る。前記取り付け部材１０２ａならびに１０２ｂは同一
形状を有し、前記クロスダイクロイクプリズム８の上下
面に倣って当該面に接着する平面部と、当該部に直交し
折り曲がったマウント部材１０１への取り付け部を有す
る形状を有する。クロスダイクロイックプリズム８の上
面に接着する取り付け部材１０２ａの前記取り付け部は
上部へ曲げられ、下面に取り付けられた取り付け部材１
０２ｂの折り曲げ部は下方向を向いている。さらに両折
り曲げ部にはネジ取り付け用の穴が複数個形成されてい
る。Next, the mounting member 102a and the member 1 are mounted on the upper and lower surfaces of the cross dichroic prism 8 described above.
02b (not shown) are bonded with an adhesive to form a further integrated member of the two members and the integrated member. The mounting members 102a and 102b have the same shape, and include a flat portion that adheres to the surface following the upper and lower surfaces of the cross dichroic prism 8, and a mounting portion to the mount member 101 that is bent perpendicular to the portion. Having a shape having The mounting portion of the mounting member 102a bonded to the upper surface of the cross dichroic prism 8 is bent upward and the mounting member 1 mounted on the lower surface
The bent portion of 02b faces downward. Further, a plurality of holes for screw attachment are formed in both bent portions.

【００３１】これら取り付け部材１０２ａ、１０２ｂ
は、前記の折り曲げ部に形成された穴をとおして、マウ
ント部材１０１にネジ部材にて螺着され、マウント部材
への一体化が可能となる。各色光用偏光ビームスプリッ
タ６Ｒ、６Ｇ、６Ｂとライトバルブ７Ｒ、７Ｇ、７Ｂな
らびに１／４波長位相板９Ｒ，９Ｒ，９Ｂの一体化につ
いて説明する。The mounting members 102a, 102b
Is screwed to the mount member 101 with a screw member through the hole formed in the bent portion, and can be integrated with the mount member. The integration of the polarization beam splitters 6R, 6G, 6B for each color light, the light valves 7R, 7G, 7B and the quarter-wave phase plates 9R, 9R, 9B will be described.

【００３２】各偏光ビームスプリッタの各色光射出面
（ライトバルブからの光の入射面）と直交する上下面に
はそれぞれ各偏光ビームスプリッタとも第１ライトバル
ブ取り付け部材１０４Ｂａ、１０４Ｂｂ、１０４Ｒａ、
１０４Ｒｂならびに１０４Ｇａ、１０４Ｇｂを接着して
取り付ける。これら第１取り付け部材は各偏光ビームス
プリッタの接着取り付け面に対して直角に上方向または
下方向折り曲げられており、その折り曲げ部の両端部に
は上方向または下方向にそれぞれ脚部を有している。そ
して取り付けられた時に、それら脚部のなす面と偏光ビ
ームスプリッタの前記射出面とは互いに平行でかつ所定
の間隔を有して固定される。これら第１一体化部材はＳ
ＰＣ材等で構成されており、表面がメッキされ、さら
に、前記脚部には半田メッキが施されている。First and second light valve mounting members 104Ba, 104Bb, 104Ra, and 104B are provided on the upper and lower surfaces of each of the polarization beam splitters, which are orthogonal to the respective color light emission surfaces (the light incident surfaces from the light valves).
104Rb and 104Ga, 104Gb are adhered and attached. These first mounting members are bent upward or downward at right angles to the adhesive mounting surface of each polarizing beam splitter, and have both upward and downward legs at both ends of the bent portions. I have. Then, when attached, the surface formed by the legs and the exit surface of the polarizing beam splitter are fixed to each other in parallel with a predetermined interval. These first integrated members are S
It is made of a PC material or the like, the surface of which is plated, and the legs are plated with solder.

【００３３】そして、前記各色光用の第１ライトバルブ
取付部材の脚部と、当該脚部にそれぞれ対応する脚部を
有し、後述の構成による１／４波長位相板とライトバル
ブを一体化した部材中のライトバルブの前面に配置され
る光遮光板部材１０６Ｒ，１０５Ｇ，１０５Ｂであっ
て、第２ライトバルブ取付部材の前記脚部とをハンダ付
けすることにより一体化する。The first light valve mounting member for each color light has a leg portion and a leg portion corresponding to the leg portion, and a quarter-wave phase plate and a light valve having a configuration described later are integrated. The light shielding plate members 106R, 105G, and 105B disposed on the front surface of the light valve in the above member, and are integrated by soldering with the legs of the second light valve mounting member.

【００３４】上記の一体化のうちのライトバルブ７Ｒ，
７Ｇ，７Ｂと１／４波長位相板９Ｒ，９Ｇ，９Ｂの一体
化について図２の各部材分解図を用いて説明する。な
お、図２においては図示の分解図がＲ，Ｇ，Ｂ光につい
てそれぞれ存在するが、本図では色指定の記載は各部材
についてしないで、例えばライトバルブは７Ｒ、７Ｇ，
７Ｂのところライトバルブ７と記載した。The light valve 7R,
The integration of 7G, 7B with quarter-wave phase plates 9R, 9G, 9B will be described with reference to the exploded view of each member in FIG. In FIG. 2, there are exploded views for R, G, and B lights, but in this drawing, the color designation is not described for each member.
The light valve 7 was described at 7B.

【００３５】ライトバルブ７と１／４波長位相板９の一
体化部材は、ライトバルブ背部に配置され、ライトバル
ブ７の熱放熱の役目を有する背板１０８、ライトバルブ
７、第２ライトバルブ取付部材を兼用する遮光板１０
５、１／４波長位相板ホルダー１０７、１／４波長位相
板９ならびにカバー部材１０６とから構成される。角に
ネジ部１０８ｅ，１０８ｆ，１０８ｇ，１０８ｈを有す
る前記背板１０８にはザグリ部が形成されており、当該
部にライトバルブ７を背面から接着、嵌着させて固定す
る。前記光遮光部材１０５は第２ライトバルブ取り付け
部材を兼ねるために、前述のように第１取り付け部材の
脚部に対応する位置に同様に脚部を有する。さらに角部
内側には前記背板部材１０８のネジ部１０８ｅ〜１０８
ｈに対応する位置に、貫通穴１０５ｅ〜１０５ｈが形成
されている。さらに、略中央部には光遮光部材としての
機能を担保するための開口部１０５ｂを有し、当該穴部
を通過した光りのみをライトバルブ７に入射させ、他の
箇所に入射した光は当該部材で遮断するすることができ
るようにする。The integrated member of the light valve 7 and the quarter-wave phase plate 9 is disposed on the back of the light valve, and serves as a back plate 108 for heat radiation of the light valve 7, the light valve 7, and the second light valve mounting. Light shielding plate 10 which also serves as a member
It is composed of a 5, 1/4 wavelength phase plate holder 107, a 1/4 wavelength phase plate 9, and a cover member 106. A counterbore portion is formed on the back plate 108 having screw portions 108e, 108f, 108g, and 108h at corners, and the light valve 7 is adhered and fitted to the corresponding portion from the back surface and fixed. The light blocking member 105 also has a leg at a position corresponding to the leg of the first mounting member, as described above, to also serve as the second light valve mounting member. Further, inside the corners, screw portions 108e to 108 of the back plate member 108 are provided.
h, through holes 105e to 105h are formed. Further, an opening 105b for ensuring a function as a light shielding member is provided at a substantially central portion, and only light passing through the hole is incident on the light valve 7, and light incident on other portions is It can be blocked by a member.

【００３６】１／４波長位相板９は円形状のものをあら
かじめ光学軸の方向が外見から理解できるように両端を
カットした形状としておく。１／４波長位相板９は位相
板ホルダー１０７に接着固定される。当該位相板ホルダ
ー１０７は１／４波長位相板の外周形状に倣った外形の
円弧部材に当該部材に接着した１／４波長位相板９を回
転させるための突起部１０７ａと当該突起部にネジ１０
７ｂを有する構造である。前述のように円弧近接部とに
１／４波長位相板９の外周近接部を接着し固定する。な
お、その際にホルダー部材１０７の突起部の方向と、１
／４波長位相板９の所定の光学軸の方向の関係を一致さ
せて配置することが重要である。この１／４波長位相板
９とホルダー部材１０７の接着一体化部材は、後述のカ
バー部材１０６に中に、前記突起部１０７ａを中より外
部へ飛び出させる構成にて配置される。The quarter-wave phase plate 9 has a circular shape in which both ends are cut in advance so that the direction of the optical axis can be understood from the outside. The 波長 wavelength phase plate 9 is bonded and fixed to the phase plate holder 107. The phase plate holder 107 has a projection 107a for rotating the quarter wavelength phase plate 9 adhered to the member on an arc member having an outer shape following the outer shape of the quarter wavelength phase plate, and a screw 10 on the projection.
7b. As described above, the outer peripheral portion of the quarter-wave phase plate 9 is bonded and fixed to the circular arc portion. At this time, the direction of the protrusion of the holder member 107 and 1
It is important to arrange the quarter-wave phase plate 9 so that the relationship of the direction of the predetermined optical axis coincides. The integrated bonding member of the quarter-wave phase plate 9 and the holder member 107 is disposed in a cover member 106 described later in such a manner that the protrusion 107a projects outside from the inside.

【００３７】カバー部材１０６は１／４波長位相板ホル
ダー１０７とともに１／４波長位相板を内部に納入する
とともに、全体のカバーの役目をし、さらに前記のよう
に。波長板ホルダーの突起部１０７を当該カバー部材よ
り外へ突出するのを担保することと、１／４波長位相板
の中心位置を決定する機能を担保するための開口部１０
６ａを有することと、さらに、段差を有した面には前記
カバー部材１０６の開口１０６ａからでているホルダー
部材１０７の突起部のネジ１０７ｂを合致する位置に、
円弧状の穴部１０６ｂを有すしている。さらに、その角
部には円弧穴１０６ｂを形成した面と同一面になるよう
にカバー部材の表面と同様に段差を有し、その面には穴
部１０６ｅ〜１０６ｈを有しており、当該穴からネジ部
材にて、前記光遮光部材１０５の穴部１０５ｅ〜１０５
ｈを通して背板部材のネジ部１０７ｅ〜１０７ｈにそれ
ぞれ螺着させることにより、１／４波長板９とライトバ
ルブ７、第２取り付け部材１０５の一体化が達成でき
る。なお、その一体化された斜視組立図を図３に示す。
なお、前述の１／４波長位相板の回転軸の位置は、前記
カバー部材１０６７の円弧穴１０６ｂのライトバルブ側
からネジを挿入し、当該ネジを前記波長板ホルダー１０
７の突起部１０７ａのネジ１０７ｂに螺着することによ
り担保される。ただし、前記ネジの螺着は後述の波長板
の光軸位置調節の際に最終的に決定されるので、それま
では、前記円弧穴にそって、前記突起部１０７ａを動か
して波長板が中心軸の回りに回転可能なように、螺着は
せず、ネジを螺合した状態としておく。The cover member 106 supplies the 1/4 wavelength phase plate together with the 1/4 wavelength phase plate holder 107, and serves as the entire cover, and as described above. The opening 10 for ensuring that the projection 107 of the wave plate holder projects outside the cover member and for determining the center position of the quarter-wave phase plate.
6a, and further, on the stepped surface, a position where the screw 107b of the protrusion of the holder member 107 coming out of the opening 106a of the cover member 106 matches,
It has an arc-shaped hole 106b. Further, the corner has a step similar to the surface of the cover member so as to be flush with the surface on which the arc hole 106b is formed, and the surface has holes 106e to 106h. Hole portions 105e-105 of the light shielding member 105
By screwing into the threaded portions 107e to 107h of the back plate member through h, the integration of the 波長 wavelength plate 9, the light valve 7, and the second mounting member 105 can be achieved. FIG. 3 shows an integrated perspective assembly diagram.
The position of the rotation axis of the quarter-wave phase plate is set by inserting a screw from the light valve side of the arc hole 106b of the cover member 1067, and inserting the screw into the wave plate holder 10.
7 is secured by being screwed onto the screw 107b of the projection 107a. However, since the screwing of the screw is finally determined at the time of adjusting the optical axis position of the wave plate to be described later, the wave plate is moved to the center by moving the protrusion 107a along the arc hole until then. The screw is not screwed so that the screw can be rotated around the axis, and the screw is screwed.

【００３８】図３には、上記の様にカバー部材１０６部
材内に１／４波長位相板を配置し、前記ホルダー部材１
０７の突起部１０７ａのネジに波長板側からカバー部材
の円弧穴をとおしてネジを螺着した斜視構成図を示す。
図１に戻って、前述のようにライトバルブ６Ｒ，６Ｇ，
６Ｂのそれぞれについて前記の一体化を達成し、これら
部材を次に前述の各色光用の偏光ビームスプリッタ６
Ｒ，６Ｇ，６Ｂに取り付けた第１ライトバルブ取り付け
部材１０４Ｒａ、１０４Ｒｂ、１０４Ｇａ、１０４Ｇ
ｂ、１０４Ｂａ、１０４Ｂｂにそれぞれの前記光遮光部
材の脚部を半田付けにて取り付けることにより全体の一
体化が達成できる。図１においては、Ｂ光についてのみ
が半田付けされた様子を示し、他色についてはまだ分離
された状態にて分解部に形で図示した。FIG. 3 shows that a quarter-wave phase plate is disposed inside the cover member 106 as described above,
FIG. 7 is a perspective view showing a configuration in which a screw of the projection 107a is screwed from the wavelength plate side through an arc hole of the cover member.
Returning to FIG. 1, as described above, the light valves 6R, 6G,
6B, the above-described integration is achieved, and these members are then combined with the polarization beam splitters 6 for the respective color lights described above.
First light valve mounting members 104Ra, 104Rb, 104Ga, 104G mounted on R, 6G, 6B
By mounting the legs of the light-shielding members to b, 104Ba, and 104Bb by soldering, the whole integration can be achieved. FIG. 1 shows a state in which only the B light is soldered, and the other colors are shown in a disassembled state in a state where they are still separated.

【００３９】一体化の際には、各ライトバルブ６Ｒ、６
Ｇ、６Ｂの画素を一致させる、すなわちレジストレーシ
ョン調整を行う必要がある。そのレジストレーション調
整は前述の第１ライトバルブ取り付け部材と第２取り付
け部材の脚部をそれぞれ半田付けして一体化する際にお
こなう。図１においては、Ｂ光用のみが一体化されてい
るが、実際には、Ｇ光用の一体化から行うのがよい。す
なわち、まず、第１一体化部材１０４Ｇａならびに１０
４Ｇｂの脚部に、Ｇ光用ライトバルブ７Ｇならびに１／
４波長位相板９Ｇを一体化した部材の前記第２取り付け
部材の脚部を半田付けして固定する。次に、Ｒ光または
Ｂ光の一方のライトバルブと１／４波長位相板一体化部
材の前記脚部を前述のＧ光用ライトバルブの投射像の画
素に一致させて半田付けし、レジストレーションを達成
する。次に残りの一体化部材の脚部を同様に半田付け
し、Ｒ、Ｇ、Ｂ光のレジストレーション調整が達成され
る。At the time of integration, each light valve 6R, 6R
It is necessary to match the pixels of G and 6B, that is, to perform registration adjustment. The registration is adjusted when the legs of the first light valve mounting member and the second mounting member are soldered and integrated. In FIG. 1, only the light for B light is integrated, but actually, it is better to start with the light for G light. That is, first, the first integrated members 104Ga and 10Ga
The 4Gb legs have G light valve 7G and 1 /
The legs of the second mounting member of the member integrating the four-wavelength phase plate 9G are fixed by soldering. Next, one of the light valves for R light or B light and the leg of the 1/4 wavelength phase plate integrated member are soldered so as to match the pixels of the projected image of the light valve for G light. To achieve. Next, the legs of the remaining integrated members are soldered in the same manner, and the registration adjustment of the R, G, and B lights is achieved.

【００４０】このレジストレーション調整が達成された
後で、次に各色の１／４波長位相板の光軸調整を行う。
前述の様に、各色光用の１／４波長位相板９Ｒ、９Ｇ、
９Ｂはそれぞれホルダー部材１０７Ｒ、１０７Ｇ、１０
７Ｂに取り付けられて一体化されているが、ホルダー部
材１０７の突起部の先端部１０７ａは、各色光用の一体
化部材中のカバー部材１０６の円弧条穴１０６ｂを通し
てネジで螺合してあるが、当該突き出し部を、円弧状穴
に沿って動かすことにより、前記１／４波長位相板の光
軸調節をすることができる。After the registration adjustment is achieved, the optical axis of the 1/4 wavelength phase plate for each color is adjusted.
As described above, quarter-wave phase plates 9R, 9G for each color light,
9B are holder members 107R, 107G, 10
7B, the tip portion 107a of the protrusion of the holder member 107 is screwed through the circular arc hole 106b of the cover member 106 in the integrated member for each color light. By moving the protruding portion along the arc-shaped hole, the optical axis of the quarter-wave phase plate can be adjusted.

【００４１】前記の１／４波長位相板の光軸調節は次の
ようにして行う。各色用のライトバルブはすべて非変調
の状態としておく。すなわち、各画素は選択されず、入
射したＳ偏光が変調されずすべてＳ偏光で射出されるこ
ととする。理想的には、当該Ｓ偏光光は各色用偏光ビー
ムスプリッタ６Ｒ、６Ｇ、６Ｂにてすべて反射廃棄され
るために、投射像は理想的な黒状態が達成されるはずで
ある。しかし、そうなっていないことは前述のとおりで
あって、この状態で、各色光用１／４波長位相板を遮光
板の背面に飛び出した前記ホルダー部材１０７Ｒ、１０
７Ｇ、１０７Ｂの突起部の先端部を円弧状穴１０６ｂに
沿って動かして、最もコントラストの良好な、すなわち
投射像において最も黒状態が良好な部分を選択決定す
る。選択決定された位置において、ネジを螺着固着さ
せ、１／４波長位相板を固定する。The adjustment of the optical axis of the quarter-wave phase plate is performed as follows. The light valves for each color are all left unmodulated. That is, each pixel is not selected, and the incident S-polarized light is not modulated and all are emitted as S-polarized light. Ideally, the S-polarized light is all reflected and discarded by the polarization beam splitters 6R, 6G, and 6B for each color, so that the projected image should achieve an ideal black state. However, as described above, this is not the case. In this state, the holder members 107R, 10R, 10R,
By moving the tips of the projections of 7G and 107B along the arc-shaped hole 106b, a portion having the best contrast, that is, a portion having the best black state in the projected image is selected and determined. At the position determined and determined, a screw is screwed and fixed to fix the quarter-wave phase plate.

【００４２】以上により、各色ライトバルブ、各色光毎
の偏光ビームスプリッタ、クロスダイクロイックならび
に投射レンズからなる検光光学系、合成光学系ならびに
投射レンズがマウント部材を中心に一体化され、さら
に、前記偏光ビームスプリッタとライトバルブの間にも
１／４波長位相板が最適な光軸方向に配置されて前記一
体化の中に組み込まれるために、環境温度変化があった
としても投射像のボケやレジストレーションズレが少な
く、さらにコントラストの良好な投射型表示装置を提供
すること可能となる。 （第４実施の形態）本実施の形態を示す構成図を一部の
分解図とともに図５に示す。本形態にて採用した投射型
表示装置の構成は図６に示した前述の投射型表示装置の
第２形態にて示したそれである。なお、光源１１の図示
は省略した。As described above, the light valve for each color, the polarizing beam splitter for each color light, the analyzing optical system including the cross dichroic and the projection lens, the combining optical system, and the projection lens are integrated around the mount member. A quarter-wave phase plate is also arranged between the beam splitter and the light valve in the direction of the optimal optical axis, and is incorporated into the above-mentioned unit. It is possible to provide a projection-type display device that has less deviation and has good contrast. (Fourth Embodiment) FIG. 5 shows a configuration diagram showing this embodiment together with a partial exploded view. The configuration of the projection display device adopted in this embodiment is that shown in the second embodiment of the projection display device shown in FIG. The illustration of the light source 11 is omitted.

【００４３】本実施の形態においても第３実施の形態と
同様に投射レンズ１７を取り付けたマウント部材２０１
にたいして、投射型表示装置を構成する部材のうちの、
偏光ビームスプリッタ１２、プリズム１３、１４、１５
からなる複合プリズム部材ならびにライトバルブブ１６
Ｒ、１６Ｇ、１６Ｂならびに１／４波長位相板１８Ｒ、
１８Ｇ、１８Ｂを一体化した部材を一体化部材２０２ａ
ならびに同部材２０２ｂを使用して取り付け、一体化さ
せることを特徴とする。In the present embodiment, similarly to the third embodiment, a mount member 201 to which the projection lens 17 is attached is provided.
For the members of the projection display device,
Polarizing beam splitter 12, prisms 13, 14, 15
Prism member and light bulb 16 made of
R, 16G, 16B and quarter-wave phase plate 18R,
18G and 18B are integrated into an integrated member 202a.
It is also characterized by being attached and integrated using the same member 202b.

【００４４】マウント部材２０１は図１の同部材１０１
と同様な構成を有し、投射レンズ１７の一部を前もって
同部材の貫通穴に嵌入させ、フランジ部をマウント部材
にネジ部材にて螺着させることにより固定する。偏光ビ
ームスプリッタ１２と複合プリズム部材の一体化につい
て説明する。前述のように、図５に示すように、偏光ビ
ームスプリッタ１２と複合プリズムを構成するプリズム
１３の入射面１３ａ、ならびにプリズム１３の１３ｂ面
とプリズム１４の入射面１４ａとの間には、全反射作用
を担保するために空隙がそれぞれ形成されている。The mounting member 201 is the same member 101 of FIG.
And a part of the projection lens 17 is fitted in a through hole of the same member in advance, and the flange portion is fixed to the mount member by screwing it with a screw member. The integration of the polarizing beam splitter 12 and the composite prism member will be described. As described above, as shown in FIG. 5, total reflection is caused between the polarization beam splitter 12 and the entrance surface 13a of the prism 13 constituting the composite prism, and between the 13b surface of the prism 13 and the entrance surface 14a of the prism 14. Voids are formed to ensure the operation.

【００４５】本実施の形態では、それぞれ、両空隙形成
のために所定の厚みを有する金属箔を所定の開口を有す
る枠形状にエッチング加工し、当該枠部材２１１、２１
２を両空隙に挟み込み、両プリズム部材と当該枠部材を
接着剤にて接着して固定して、一体化部材とする構成を
採用した。図７はその分解構成図である。プリズム１４
と１５はプリズム１４の１４ａ面にダイクロイック膜を
構成し、当該膜面とプリズム１５の面１５ａとを接着さ
せることとするために一体化されている。In the present embodiment, a metal foil having a predetermined thickness is etched into a frame shape having a predetermined opening to form both air gaps.
2 was sandwiched between the two gaps, and both prism members and the frame member were adhered and fixed with an adhesive to form an integrated member. FIG. 7 is an exploded configuration diagram. Prism 14
And 15 are integrated to form a dichroic film on the surface 14a of the prism 14, and to bond the film surface to the surface 15a of the prism 15.

【００４６】上記の構成にて一体化された偏光ビームス
プリッタ１２と複合プリズム部材は、図４に記載のよう
に、一体化部材２０２ａならびに２０２ｂを使用してマ
ウント部材に取り付けられる。マウント部材２０１ａ、
２０１ｂは同一形状を有し、偏光ビームスプリッタ１２
の偏光分離部露出の上下面と、プリズム１３ならびにプ
リズム１４にまで及ぶ接着面を有し、当該面と前記部材
との接着面とを接着剤にて接着固定する。マウント部材
の偏光ビームスプリッタ接着部先端部は、それぞれ偏光
ビームスプリッタ１２の検光光射出面と同一面となるよ
うに、折り曲げ部を有し、当該折り曲げ部にはマウント
部座への取り付けように複数の穴部が形成され、当該穴
部を通して、ネジ部材にてマウント部材へ螺着させて固
定し、一体化を達成する。As shown in FIG. 4, the polarizing beam splitter 12 and the composite prism member integrated by the above configuration are attached to the mount member using the integrated members 202a and 202b. Mount member 201a,
201b has the same shape, and the polarization beam splitter 12
And an adhesive surface extending to the prism 13 and the prism 14, and the surface and the adhesive surface to the member are bonded and fixed with an adhesive. The front end of the polarizing beam splitter bonding portion of the mount member has a bent portion so as to be flush with the analysis light emission surface of the polarizing beam splitter 12, and the bent portion is attached to a mount seat. A plurality of holes are formed, and the holes are screwed and fixed to the mount member with a screw member through the holes to achieve integration.

【００４７】複合プリズム部材を構成するプリズム部材
の射出面１３ｃ、１４ｃ、ならびに１４ｃの上下部にそ
れぞれ垂直な面には前記射出面にそれぞれ半田付け用脚
部が平行となるように、且つ、当該脚部と前記射出面と
の間に所定の間隔を有するように各色光用の第１ライト
バルブ取り付け部材２０４Ｂａ、２０４Ｂｂ、２０４Ｒ
ａ、２０４Ｒｂ、２０４Ｂａ、２０４Ｂｂを接着して取
り付ける。The surfaces of the prism members constituting the composite prism member are perpendicular to the upper and lower surfaces of the exit surfaces 13c, 14c, and 14c so that the soldering legs are parallel to the exit surfaces, respectively. First light valve mounting members 204Ba, 204Bb, 204R for each color light so as to have a predetermined space between the leg and the exit surface.
a, 204Rb, 204Ba, and 204Bb are bonded and attached.

【００４８】各色光用ライトバルブと１／４波長位相板
ならびに当該両部材を保持する方法は図２に記載の分解
部ならびに図３の斜視図と同様であるので説明を省略す
る。第３実施の形態と同様に両部材を半田付けして固定
し各色光用のライトバルブのレジストレーション調節を
実施し、その後で、カバー部材の円弧穴部側から当該穴
とホルダー部材のネジを螺合させ、位相ホルダーの先端
部を動かして１／４波長位相板を回転させて最もコント
ラストの良好となる位置にて当該先端部と円弧穴部を接
着固定させる。The light valve for each color light, the quarter-wave phase plate, and the method for holding the two members are the same as those of the disassembled portion shown in FIG. 2 and the perspective view of FIG. Similarly to the third embodiment, the two members are soldered and fixed, and the registration of the light valve for each color light is adjusted. Thereafter, the screw and the screw of the holder member are removed from the arc hole side of the cover member. Then, the tip of the phase holder is moved to rotate the quarter-wave phase plate, and the tip and the arc hole are bonded and fixed at the position where the contrast is best.

【００４９】本実施の形態の投射型表示装置では、ライ
トバルブ１６Ｒと１６Ｇが近接する構成を取るために、
前記ライトバルブ１６Ｒと１６Ｇと１／４波長位相板を
取り付けた第２取り付け部材は図５に示すように、互い
に上下逆にした配置とすることにより部材の干渉（ライ
トバルブからのフレキシブル配線部材）を防止する構成
とした。In the projection type display device of the present embodiment, since the light valves 16R and 16G take a configuration in which they are close to each other,
As shown in FIG. 5, the second mounting members to which the light valves 16R, 16G and the quarter-wave phase plate are mounted are arranged upside down as shown in FIG. Is configured to prevent the

【００５０】以上の説明のように、光源光であって偏光
ビームスプリッタを経由した白色光を色分解合成光学系
を構成する複合プリズムでＲ光、Ｇ光、Ｂ光に色分解
し、ライトバウルブに入射させて反射、変調して射出さ
せ、前記の複合プリズムにて色合成を達成して、前記偏
光ビームスプリッタにて変調光を検光して取り出し、投
射レンズにて投射させる構成の投射型表示装置におい
て、投射レンズを取り付けたマウント部材にたいして、
前記偏光ビームスプリッタ、複合プリズム、ライトバル
ブならびに、前記複合プリズム射出面とライトバルブの
間に１／４波長位相板を一体化した部材を取り付けた構
成とすることにより、コントラストが良好で、環境温度
変化によってもレジストレーションずれや、投射像のぼ
けの発生しない投射型表示装置が提供できる。 （第５実施の形態）本発明の第５実施の形態を示す構成
図を一部分解した構成図として図１に示す。As described above, the white light that has passed through the polarizing beam splitter as the light source light is color-separated into R light, G light, and B light by the composite prism that constitutes the color separation / synthesis optical system, and is converted into a light bulb. A projection type display having a configuration in which the light is made incident, reflected, modulated, and emitted, color synthesis is achieved by the composite prism, modulated light is analyzed and extracted by the polarizing beam splitter, and projected by a projection lens. In the device, for the mount member to which the projection lens is attached,
By providing the polarizing beam splitter, the compound prism, the light valve, and the member in which the 1/4 wavelength phase plate is integrated between the light exit surface of the compound prism and the light valve, the contrast is good and the environmental temperature is high. It is possible to provide a projection-type display device in which a registration shift and a blur of a projected image do not occur due to a change. (Fifth Embodiment) FIG. 1 is a partially exploded view of a configuration diagram showing a fifth embodiment of the present invention.

【００５１】本実施の形態にて採用した投射型表示装置
の構成は、図４に記載した投射型表示装置のそれであ
る。なお、図４において記載の構成図のうちの光源、色
分解光学系は本発明の趣旨には関係しないので、図１に
おいて既に形成されているものとしてそれらの図示なら
びに説明は省略する。本実施の形態においては、図４の
上記投射型表示装置の第１実施の形態で記載した投射型
表示装置の構成において、ライトバルブ７Ｒ、７Ｇ、７
Ｂ、偏光ビームスプリッタ６Ｒ、６Ｇ、６Ｂ、クロスダ
イクロイックプリズム８ならびに投射レンズ１０をマウ
ント部材１０１を使用して一体化させる構成とした。The configuration of the projection display device employed in this embodiment is that of the projection display device shown in FIG. Since the light source and the color separation optical system in the configuration diagram shown in FIG. 4 are not related to the gist of the present invention, their illustration and description are omitted because they are already formed in FIG. In the present embodiment, in the configuration of the projection display device described in the first embodiment of the projection display device of FIG. 4, the light valves 7R, 7G, 7
B, the polarizing beam splitters 6R, 6G, 6B, the cross dichroic prism 8, and the projection lens 10 are integrated using a mount member 101.

【００５２】まず、マウント部材１０１に対して、投射
レンズ１０を取り付ける。マウント部材１０１は投射装
置筐体の床部材（図示せず）にたいして、図示のように
ネジ部材にて前もって取り付けておく。マウント部材の
略中央部には当該部材の厚み方向に、投射レンズ１０の
一部が嵌入するのと、変調光が当該レンズに入射される
のを担保するための貫通穴が形成されている。当該穴に
垂直な両面の穴の外周部には投射レンズのフランジ部を
螺着するためのネジが、他方には後述の一体化部材を取
り付けるためのネジが形成されている。First, the projection lens 10 is attached to the mount member 101. The mount member 101 is attached in advance to a floor member (not shown) of the projection device housing with a screw member as illustrated. At a substantially central portion of the mount member, a through hole is formed in a thickness direction of the mount member so as to ensure that a part of the projection lens 10 is fitted and that modulated light is incident on the lens. Screws for screwing the flange portion of the projection lens are formed on the outer peripheral portions of the holes on both sides perpendicular to the holes, and screws for attaching an integrated member described later are formed on the other side.

【００５３】投射レンズ１０はそのフランジより後方を
穴に嵌入させ、フランジ部を前記ネジにネジ部材にて螺
着させてマウント部材１０１に固定する。次に、上記の
一体化のうちの、クロスダイクロイックプリズム８と各
色光用偏光ビームスプリッタ６Ｒ，６Ｇ，６Ｂはそれぞ
れ透明ガラス板部材１０３Ｒ、１０３Ｇ、１０３Ｂを接
着剤にて接着させることにより固着させ一体化させる構
成とした。これは一体化の目的の他に光路長を各色光毎
に調節する機能も有する。The projection lens 10 is fitted into the hole behind the flange, and the flange portion is fixed to the mount member 101 by screwing the flange portion to the screw with a screw member. Next, the cross dichroic prism 8 and the polarization beam splitters 6R, 6G, 6B for the respective color lights of the above-mentioned integration are fixed by bonding the transparent glass plate members 103R, 103G, 103B with an adhesive, respectively. Configuration. This has a function of adjusting the optical path length for each color light in addition to the purpose of integration.

【００５４】次に、前述のクロスダイクロイックプリズ
ム８の上下面に取り付け部材１０２ａならびに同部材１
０２ｂ（図示せず）をそれぞれ接着剤にて接着し、当該
両部材と前記一体化部材のさらなる一体化部材を形成す
る。前記取り付け部材１０２ａならびに１０２ｂは同一
形状を有し、前記クロスダイクロイクプリズム８の上下
面に倣って当該面に接着する平面部と、当該部に直交し
折り曲がったマウント部材１０１への取り付け部を有す
る形状を有する。クロスダイクロイックプリズム８の上
面に接着する取り付け部材１０２ａの前記取り付け部は
上部へ曲げられ、下面に取り付けられた取り付け部材１
０２ｂの折り曲げ部は下方向を向いている。さらに両折
り曲げ部にはネジ取り付け用の穴が複数個形成されてい
る。Next, the mounting member 102a and the member 1 are mounted on the upper and lower surfaces of the cross dichroic prism 8 described above.
02b (not shown) are bonded with an adhesive to form a further integrated member of the two members and the integrated member. The mounting members 102a and 102b have the same shape, and include a flat portion that adheres to the surface following the upper and lower surfaces of the cross dichroic prism 8, and a mounting portion to the mount member 101 that is bent perpendicular to the portion. Having a shape having The mounting portion of the mounting member 102a bonded to the upper surface of the cross dichroic prism 8 is bent upward and the mounting member 1 mounted on the lower surface
The bent portion of 02b faces downward. Further, a plurality of holes for screw attachment are formed in both bent portions.

【００５５】これら取り付け部材１０２ａ、１０２ｂ
は、前記の折り曲げ部に形成された穴をとおして、マウ
ント部材１０１にネジ部材にて螺着され、マウント部材
への一体化が可能となる。各色光用偏光ビームスプリッ
タ６Ｒ、６Ｇ、６Ｂとライトバルブ７Ｒ、７Ｇ、７Ｂな
らびに１／４波長位相板９Ｒ，９Ｒ，９Ｂの一体化につ
いて説明する。The mounting members 102a, 102b
Is screwed to the mount member 101 with a screw member through the hole formed in the bent portion, and can be integrated with the mount member. The integration of the polarization beam splitters 6R, 6G, 6B for each color light, the light valves 7R, 7G, 7B and the quarter-wave phase plates 9R, 9R, 9B will be described.

【００５６】各偏光ビームスプリッタの各色光射出面
（ライトバルブからの光の入射面）と直交する上下面に
はそれぞれ各偏光ビームスプリッタとも第１ライトバル
ブ取り付け部材１０４Ｂａ、１０４Ｂｂ、１０４Ｒａ、
１０４Ｒｂならびに１０４Ｇａ、１０４Ｇｂを接着して
取り付ける。これら第１取り付け部材は各偏光ビームス
プリッタの接着取り付け面に対して直角に上方向または
下方向折り曲げられており、その折り曲げ部の両端部に
は上方向または下方向にそれぞれ脚部を有している。そ
して取り付けられた時に、それら脚部のなす面と偏光ビ
ームスプリッタの前記射出面とは互いに平行でかつ所定
の間隔を有して固定される。これら第１一体化部材はＳ
ＰＣ材等で構成されており、表面がメッキされ、さら
に、前記脚部には半田メッキが施されている。The first light valve mounting members 104Ba, 104Bb, 104Ra, and 104B are provided on the upper and lower surfaces of each of the polarization beam splitters, which are orthogonal to the respective color light emission surfaces (the light incident surfaces from the light valves).
104Rb and 104Ga, 104Gb are adhered and attached. These first mounting members are bent upward or downward at right angles to the adhesive mounting surface of each polarizing beam splitter, and have both upward and downward legs at both ends of the bent portions. I have. Then, when attached, the surface formed by the legs and the exit surface of the polarizing beam splitter are fixed to each other in parallel with a predetermined interval. These first integrated members are S
It is made of a PC material or the like, the surface of which is plated, and the legs are plated with solder.

【００５７】そして、前記各色光用の第１ライトバルブ
取付部材の脚部と、当該脚部にそれぞれ対応する脚部を
有し、後述の構成による１／４波長位相板とライトバル
ブを一体化した部材中のライトバルブの前面に配置され
る光遮光板部材１０６Ｒ，１０５Ｇ，１０５Ｂであっ
て、第２ライトバルブ取付部材の前記脚部とをハンダ付
けすることにより一体化する。The first light valve mounting member for each color light has a leg portion and a leg portion corresponding to the leg portion, and a quarter-wave phase plate and a light valve having a configuration described later are integrated. The light shielding plate members 106R, 105G, and 105B disposed on the front surface of the light valve in the above member, and are integrated by soldering with the legs of the second light valve mounting member.

【００５８】上記の一体化のうちのライトバルブ７Ｒ，
７Ｇ，７Ｂと１／４波長位相板９Ｒ，９Ｇ，９Ｂの一体
化について図２の各部材分解図を用いて説明する。な
お、図２においては図示の分解図がＲ，Ｇ，Ｂ光につい
てそれぞれ存在するが、本図では色指定の記載は各部材
についてしないで、例えばライトバルブは７Ｒ、７Ｇ，
７Ｂのところライトバルブ７と記載した。The light valve 7R,
The integration of 7G, 7B with quarter-wave phase plates 9R, 9G, 9B will be described with reference to the exploded view of each member in FIG. In FIG. 2, there are exploded views for R, G, and B lights, but in this drawing, the color designation is not described for each member.
The light valve 7 was described at 7B.

【００５９】ライトバルブ７と１／４波長位相板９の一
体化部材は、ライトバルブ背部に配置され、ライトバル
ブ７の熱放熱の役目を有する背板１０８、ライトバルブ
７、第２ライトバルブ取付部材を兼用する遮光板１０
５、１／４波長位相板ホルダー１０７、１／４波長位相
板９ならびにカバー部材１０６とから構成される。角に
ネジ部１０８ｅ，１０８ｆ，１０８ｇ，１０８ｈを有す
る前記背板１０８にはザグリ部が形成されており、当該
部にライトバルブ７を背面から接着、嵌着させて固定す
る。The integrated member of the light valve 7 and the quarter-wave phase plate 9 is disposed at the back of the light valve, and serves as a back plate 108 for heat radiation of the light valve 7, the light valve 7, and the second light valve mounting. Light shielding plate 10 which also serves as a member
It is composed of a 5, 1/4 wavelength phase plate holder 107, a 1/4 wavelength phase plate 9, and a cover member 106. A counterbore portion is formed on the back plate 108 having screw portions 108e, 108f, 108g, and 108h at corners, and the light valve 7 is adhered and fitted to the corresponding portion from the back surface and fixed.

【００６０】前記光遮光部材１０５は、角部内側に背板
部材１０８のネジ部１０８ｅ〜１０８ｈに対応する位置
に、貫通穴１０５ｅ〜１０５ｈが形成されている。さら
に、略中央部には光遮光部材としての機能を担保するた
めの開口部１０５ｂを有し、当該穴部を通過した光のみ
をライトバルブ７に入射させ、他の箇所に入射した光は
当該部材で遮断するすることができるようにする。The light shielding member 105 has through holes 105e to 105h at positions corresponding to the threaded portions 108e to 108h of the back plate member 108 inside the corners. Further, an opening 105b for ensuring a function as a light shielding member is provided at a substantially central portion, and only light passing through the hole is made incident on the light valve 7, and light incident on other portions is It can be blocked by a member.

【００６１】１／４波長位相板９は円形状のものをあら
かじめ光学軸の方向が外見から理解できるように両端を
カットした形状としておく。１／４波長位相板９は位相
板ホルダー１０７に接着固定される。当該位相板ホルダ
ー１０７は１／４波長位相板の外周形状に倣った外形の
円弧部材に当該部材に接着した１／４波長位相板９を回
転させるための突起部１０７ａと当該突起部にネジ１０
７ｂを有する構造である。前述のように円弧近接部とに
１／４波長位相板９の外周近接部を接着し固定する。な
お、その際にホルダー部材１０７の突起部の方向と、１
／４波長位相板９の所定の光学軸の方向の関係を一致さ
せて配置することが重要である。この１／４波長位相板
９とホルダー部材１０７の接着一体化部材は、後述のカ
バー部材１０６に中に、前記突起部１０７ａを中より外
部へ飛び出させる構成にて配置される。The quarter-wave phase plate 9 has a circular shape in which both ends are cut in advance so that the direction of the optical axis can be seen from the outside. The 波長 wavelength phase plate 9 is bonded and fixed to the phase plate holder 107. The phase plate holder 107 has a projection 107a for rotating the quarter wavelength phase plate 9 adhered to the member on an arc member having an outer shape following the outer shape of the quarter wavelength phase plate, and a screw 10 on the projection.
7b. As described above, the outer peripheral portion of the quarter-wave phase plate 9 is bonded and fixed to the circular arc portion. At this time, the direction of the protrusion of the holder member 107 and 1
It is important to arrange the quarter-wave phase plate 9 so that the relationship of the direction of the predetermined optical axis coincides. The integrated bonding member of the quarter-wave phase plate 9 and the holder member 107 is disposed in a cover member 106 described later in such a manner that the protrusion 107a projects outside from the inside.

【００６２】カバー部材１０６は１／４波長位相板ホル
ダー１０７とともに１／４波長位相板を内部に納入する
とともに、全体のカバーの役目をし、さらに前記のよう
に。波長板ホルダーの突起部１０７を当該カバー部材よ
り外へ突出するのを担保することと、１／４波長位相板
の中心位置を決定する機能を担保するための開口部１０
６ａを有することと、さらに、段差を有した面には前記
カバー部材１０６の開口１０６ａからでているホルダー
部材１０７の突起部のネジ１０７ｂを合致する位置に、
円弧状の穴部１０６ｂを有すしている。さらに、その角
部には円弧穴１０６ｂを形成した面と同一面になるよう
にカバー部材の表面と同様に段差を有し、その面には穴
部１０６ｅ〜１０６ｈを有しており、当該穴からネジ部
材にて、前記光遮光部材１０５の穴部１０５ｅ〜１０５
ｈを通して背板部材のネジ部１０７ｅ〜１０７ｈにそれ
ぞれ螺着させることにより、１／４波長板９とライトバ
ルブ７、第２取り付け部材１０５の一体化が達成でき
る。なお、その一体化された斜視組立図を図３に示す。
なお、前述の１／４波長位相板の回転軸の位置は、前記
カバー部材１０６７の円弧穴１０６ｂのライトバルブ側
からネジを挿入し、当該ネジを前記波長板ホルダー１０
７の突起部１０７ａのネジ１０７ｂに螺着することによ
り担保される。ただし、前記ネジの螺着は後述の波長板
の光軸位置調節の際に最終的に決定されるので、それま
では、前記円弧穴にそって、前記突起部１０７ａを動か
して波長板が中心軸の回りに回転可能なように、螺着は
せず、ネジを螺合した状態としておく。The cover member 106 supplies the 1/4 wavelength phase plate together with the 1/4 wavelength phase plate holder 107, and serves as the entire cover, and as described above. The opening 10 for ensuring that the projection 107 of the wave plate holder projects outside the cover member and for determining the center position of the quarter-wave phase plate.
6a, and further, on the stepped surface, a position where the screw 107b of the protrusion of the holder member 107 coming out of the opening 106a of the cover member 106 matches,
It has an arc-shaped hole 106b. Further, the corner has a step similar to the surface of the cover member so as to be flush with the surface on which the arc hole 106b is formed, and the surface has holes 106e to 106h. Hole portions 105e-105 of the light shielding member 105
By screwing into the threaded portions 107e to 107h of the back plate member through h, the integration of the 波長 wavelength plate 9, the light valve 7, and the second mounting member 105 can be achieved. FIG. 3 shows an integrated perspective assembly diagram.
The position of the rotation axis of the quarter-wave phase plate is set by inserting a screw from the light valve side of the arc hole 106b of the cover member 1067, and inserting the screw into the wave plate holder 10.
7 is secured by being screwed onto the screw 107b of the projection 107a. However, since the screwing of the screw is finally determined at the time of adjusting the optical axis position of the wave plate to be described later, the wave plate is moved to the center by moving the protrusion 107a along the arc hole until then. The screw is not screwed so that the screw can be rotated around the axis, and the screw is screwed.

【００６３】図３には、上記の様にカバー部材１０６部
材内に１／４波長位相板を配置し、前記ホルダー部材１
０７の突起部１０７ａのネジに波長板側からカバー部材
の円弧穴をとおしてネジを螺着した斜視構成図を示す。
図１に戻って、前述のようにライトバルブ６Ｒ，６Ｇ，
６Ｂのそれぞれについて前記の一体化を達成し、これら
部材を次に前述の各色光用の偏光ビームスプリッタ６
Ｒ，６Ｇ，６Ｂに取り付けた第１ライトバルブ取り付け
部材１０４Ｒａ、１０４Ｒｂ、１０４Ｇａ、１０４Ｇ
ｂ、１０４Ｂａ、１０４Ｂｂにそれぞれの前記光遮光部
材の脚部を半田付けにて取り付けることにより全体の一
体化が達成できる。図１においては、Ｂ光についてのみ
が半田付けされた様子を示し、他色についてはまだ分離
された状態にて分解部に形で図示した。In FIG. 3, a 1/4 wavelength phase plate is disposed in the cover member 106 as described above,
FIG. 7 is a perspective view showing a configuration in which a screw of the projection 107a is screwed from the wavelength plate side through an arc hole of the cover member.
Returning to FIG. 1, as described above, the light valves 6R, 6G,
6B, the above-described integration is achieved, and these members are then combined with the polarization beam splitters 6 for the respective color lights described above.
First light valve mounting members 104Ra, 104Rb, 104Ga, 104G mounted on R, 6G, 6B
By mounting the legs of the light-shielding members to b, 104Ba, and 104Bb by soldering, the whole integration can be achieved. FIG. 1 shows a state in which only the B light is soldered, and the other colors are shown in a disassembled state in a state where they are still separated.

【００６４】一体化の際には、各ライトバルブ６Ｒ、６
Ｇ、６Ｂの画素を一致させる、すなわちレジストレーシ
ョン調整を行う必要がある。そのレジストレーション調
整は前述の第１ライトバルブ取り付け部材と第２取り付
け部材の脚部をそれぞれ半田付けして一体化する際にお
こなう。図１においては、Ｂ光用のみが一体化されてい
るが、実際には、Ｇ光用の一体化から行うのがよい。す
なわち、まず、第１一体化部材１０４Ｇａならびに１０
４Ｇｂの脚部に、Ｇ光用ライトバルブ７Ｇならびに１／
４波長位相板９Ｇを一体化した部材の前記第２取り付け
部材の脚部を半田付けして固定する。次に、Ｒ光または
Ｂ光の一方のライトバルブと１／４波長位相板一体化部
材の前記脚部を前述のＧ光用ライトバルブの投射像の画
素に一致させて半田付けし、レジストレーションを達成
する。次に残りの一体化部材の脚部を同様に半田付け
し、Ｒ、Ｇ、Ｂ光のレジストレーション調整が達成され
る。At the time of integration, each light valve 6R, 6R
It is necessary to match the pixels of G and 6B, that is, to perform registration adjustment. The registration is adjusted when the legs of the first light valve mounting member and the second mounting member are soldered and integrated. In FIG. 1, only the light for B light is integrated, but actually, it is better to start with the light for G light. That is, first, the first integrated members 104Ga and 10Ga
The 4Gb legs have G light valve 7G and 1 /
The legs of the second mounting member of the member integrating the four-wavelength phase plate 9G are fixed by soldering. Next, one of the light valves for R light or B light and the leg of the 1/4 wavelength phase plate integrated member are soldered so as to match the pixels of the projected image of the light valve for G light. To achieve. Next, the legs of the remaining integrated members are soldered in the same manner, and the registration adjustment of the R, G, and B lights is achieved.

【００６５】このレジストレーション調整が達成された
後で、次に各色の１／４波長位相板の光軸調整を行う。
前述の様に、各色光用の１／４波長位相板９Ｒ、９Ｇ、
９Ｂはそれぞれホルダー部材１０７Ｒ、１０７Ｇ、１０
７Ｂに取り付けられて一体化されているが、ホルダー部
材１０７の突起部の先端部１０７ａは、各色光用の一体
化部材中のカバー部材１０６の円弧条穴１０６ｂを通し
てネジで螺合してあるが、当該突き出し部を、円弧状穴
に沿って動かすことにより、前記１／４波長位相板の光
軸調節をすることができる。After the registration adjustment is achieved, the optical axis of the quarter-wave phase plate for each color is adjusted.
As described above, quarter-wave phase plates 9R, 9G for each color light,
9B are holder members 107R, 107G, 10
7B, the tip portion 107a of the protrusion of the holder member 107 is screwed through the circular arc hole 106b of the cover member 106 in the integrated member for each color light. By moving the protruding portion along the arc-shaped hole, the optical axis of the quarter-wave phase plate can be adjusted.

【００６６】前記の１／４波長位相板の光軸調節は次の
ようにして行う。各色用のライトバルブはすべて非変調
の状態としておく。すなわち、各画素は選択されず、入
射したＳ偏光が変調されずすべてＳ偏光で射出されるこ
ととする。理想的には、当該Ｓ偏光光は各色用偏光ビー
ムスプリッタ６Ｒ、６Ｇ、６Ｂにてすべて反射廃棄され
るために、投射像は理想的な黒状態が達成されるはずで
ある。しかし、そうなっていないことは前述のとおりで
あって、この状態で、各色光用１／４波長位相板を遮光
板の背面に飛び出した前記ホルダー部材１０７Ｒ、１０
７Ｇ、１０７Ｂの突起部の先端部を円弧状穴１０６ｂに
沿って動かして、最もコントラストの良好な、すなわち
投射像において最も黒状態が良好な部分を選択決定す
る。選択決定された位置において、ネジを螺着固着さ
せ、１／４波長位相板を固定する。The optical axis of the quarter-wave phase plate is adjusted as follows. The light valves for each color are all left unmodulated. That is, each pixel is not selected, and the incident S-polarized light is not modulated and all are emitted as S-polarized light. Ideally, the S-polarized light is all reflected and discarded by the polarization beam splitters 6R, 6G, and 6B for each color, so that the projected image should achieve an ideal black state. However, as described above, this is not the case. In this state, the holder members 107R, 10R, 10R,
By moving the tips of the projections of 7G and 107B along the arc-shaped hole 106b, a portion having the best contrast, that is, a portion having the best black state in the projected image is selected and determined. At the position determined and determined, a screw is screwed and fixed to fix the quarter-wave phase plate.

【００６７】以上により、各色ライトバルブ、各色光毎
の偏光ビームスプリッタ、クロスダイクロイックならび
に投射レンズからなる検光光学系、合成光学系ならびに
投射レンズがマウント部材を中心に一体化され、さら
に、前記偏光ビームスプリッタとライトバルブの間にも
１／４波長位相板が最適な光軸方向に配置されて前記一
体化の中に組み込まれるために、環境温度変化があった
としても投射像のボケやレジストレーションズレが少な
く、さらにコントラストの良好な投射型表示装置を提供
すること可能となる。 （第６実施の形態）略中央部には光遮光部材としての機
能を担保するための開口部１０５ｂを有し、当該穴部を
通過した光りのみをライトバルブ７に入射させ、他の箇
所に入射した光は当該部材で遮断するすることができる
ようにするまでは、前記第3実施の形態と同様である。As described above, the light valve for each color, the polarizing beam splitter for each color light, the analyzing optical system including the cross dichroic and the projection lens, the combining optical system, and the projection lens are integrated around the mount member. A quarter-wave phase plate is also arranged between the beam splitter and the light valve in the direction of the optimal optical axis, and is incorporated into the above-mentioned unit. It is possible to provide a projection-type display device that has less deviation and has good contrast. (Sixth Embodiment) An opening 105b for ensuring the function as a light shielding member is provided at a substantially central portion, and only light passing through the hole is made incident on the light valve 7, and the light is then applied to another portion. The process is the same as that of the third embodiment until the incident light can be blocked by the member.

【００６８】更に本実施の形態では、穴部と穴部１０５
ｇ、１０５ｈの間には、３個のボス１０５ｘ、１０５
ｙ、１０５ｚが形成されている。そして、これらのボス
に倣って後述の１／４波長位相板の円周部が配置されて
いる。更に、開口と穴部１０５ｅ、１０５ｆの間の端部
に近接して、円弧状に貫通形成された穴部１０５を有す
る。In this embodiment, the hole and the hole 105
g, 105h, the three bosses 105x, 105
y, 105z are formed. A circumferential portion of a quarter-wave phase plate to be described later is arranged following these bosses. Further, a hole 105 formed in an arc shape is formed near the end between the opening and the holes 105e and 105f.

【００６９】１／４波長位相板９の形状は、第３の実施
の形態と同じである。１／４波長位相板９の回転による
光学軸の位置だしを担保するために、当該１／４波長位
相板９は位相板ホルダー１０７に接着される。当該位相
板ホルダー１０７は１／４波長位相板の外周形状に倣っ
た外形の円弧部材に当該部材に接着した１／４波長位相
板９を回転させるための突起部１０７ａと当該突起部の
先端部を垂直に折り曲げた折り曲げ部１０７ｂを有する
構造であって、前述のように円弧近接部とに１／４波長
位相板９の外周近接部を接着し固定する。なお、その際
にホルダー部材１０７の突起部の方向と、１／４波長位
相板９の所定の光学軸の方向の関係を一致させて配置す
ることが重要である。この１／４波長位相板９とホルダ
ー部材１０７の接着一体化部材は、波長板１／４の外周
円弧部を前記光遮光部材１０５の前記ボス部１０５ｘ、
１０５ｙ、１０５ｚに倣って配置すると、前記ホルダー
の突起部１０７ａの先端折り曲げ部１０７ｂが、円弧状
穴１０５ａに挿入される。その際に、前記折り曲げ部１
０７ｂは突起部１０７ａにたいして垂直でなく、やや鈍
角を有するように前もって折り曲げておき、当該折り曲
げ部が、円弧状穴部１０５ａに挿入された際に、円弧状
穴の外側部に弾性を有して押しつけられる構成とする。
さらに、当該折り曲げ部１０７ｂの先端部は、円弧状穴
を通して、光遮光部材１０５の反対側に少し突出する構
成とする。カバー部材１０６は１／４波長位相板ホルダ
ー１０７の上から全体をカバーするのであるが、その角
部には段差を有し穴部１０６ｅ〜１０６ｈを有し、当該
穴からネジ部材にて、前記光遮光部材１０５の穴部１０
５ｅ〜１０５ｈを通して背板部材のネジ部１０７ｅ〜１
０７ｈにそれぞれ螺着させることにより、１／４波長板
９とライトバルブ７、第２取り付け部材１０５の一体化
が達成できる。なお、その一体化された斜視組立図を図
３に示す。The shape of the quarter-wave phase plate 9 is the same as that of the third embodiment. The quarter-wave phase plate 9 is bonded to the phase plate holder 107 in order to secure the position of the optical axis due to the rotation of the quarter-wave phase plate 9. The phase plate holder 107 includes a projection 107a for rotating the quarter-wave phase plate 9 adhered to the arc-shaped member having an outer shape following the outer shape of the quarter-wave phase plate, and a tip end of the projection. Is bent vertically, and the outer peripheral portion of the quarter-wave phase plate 9 is adhered and fixed to the arc adjacent portion as described above. In this case, it is important that the direction of the projection of the holder member 107 and the direction of the predetermined optical axis of the quarter-wavelength phase plate 9 are aligned so as to match each other. The adhesive integrated member of the quarter-wave phase plate 9 and the holder member 107 is configured such that the outer circumferential arc portion of the wave plate 1/4 is formed by the boss portion 105x of the light shielding member 105,
When they are arranged following the 105y and 105z, the bent end portion 107b of the protrusion 107a of the holder is inserted into the arc-shaped hole 105a. At this time, the bent portion 1
07b is not perpendicular to the projection 107a, but is bent in advance so as to have a slight obtuse angle. When the bent portion is inserted into the arc-shaped hole 105a, the outer portion of the arc-shaped hole has elasticity. It is configured to be pressed.
Further, the distal end of the bent portion 107b is configured to slightly protrude to the opposite side of the light shielding member 105 through the arc-shaped hole. The cover member 106 covers the whole from the top of the quarter-wave phase plate holder 107. The cover member 106 has holes 106e to 106h with a step at the corner thereof, and the screw member is used to cut the hole from the hole. Hole 10 of light shielding member 105
Screws 107e-1 of the back plate member through 5e-105h
By screwing the quarter wave plate 07h to each of them, integration of the quarter wave plate 9, the light valve 7, and the second mounting member 105 can be achieved. FIG. 3 shows an integrated perspective assembly diagram.

【００７０】図１に戻って、前述のようにライトバルブ
６Ｒ，６Ｇ，６Ｂのそれぞれについて前記の一体化を達
成し、これら部材を次に前述の各色光用の偏光ビームス
プリッタ６Ｒ，６Ｇ，６Ｂに取り付けた第１ライトバル
ブ取り付け部材１０４Ｒａ、１０４Ｒｂ、１０４Ｇａ、
１０４Ｇｂ、１０４Ｂａ、１０４Ｂｂにそれぞれの前記
光遮光部材の脚部を半田付けにて取り付けることにより
全体の一体化が達成できる。図１においては、Ｂ光につ
いてのみが半田付けされた様子を示し、他色については
まだ分離された状態にて分解部に形で図示した。Returning to FIG. 1, the above-mentioned integration is achieved for each of the light valves 6R, 6G, 6B as described above, and these members are then replaced by the above-mentioned polarizing beam splitters 6R, 6G, 6B for each color light. The first light valve mounting members 104Ra, 104Rb, 104Ga
The whole integration can be achieved by attaching the legs of the light shielding members to the 104Gb, 104Ba, and 104Bb by soldering. FIG. 1 shows a state in which only the B light is soldered, and the other colors are shown in a disassembled state in a state where they are still separated.

【００７１】一体化の際には、各ライトバルブ６Ｒ、６
Ｇ、６Ｂの画素を一致させる、すなわちレジストレーシ
ョン調整を行う必要がある。そのレジストレーション調
整は前述の第１ライトバルブ取り付け部材と第２取り付
け部材の脚部をそれぞれ半田付けして一体化する際にお
こなう。図１においては、Ｂ光用のみが一体化されてい
るが、実際には、Ｇ光用の一体化から行うのがよい。す
なわち、まず、第１一体化部材１０４Ｇａならびに１０
４Ｇｂの脚部に、Ｇ光用ライトバルブ７Ｇならびに１／
４波長位相板９Ｇを一体化した部材の前記第２取り付け
部材の脚部を半田付けして固定する。次に、Ｒ光または
Ｂ光の一方のライトバルブと１／４波長位相板一体化部
材の前記脚部を前述のＧ光用ライトバルブの投射像の画
素に一致させて半田付けし、レジストレーションを達成
する。次に残りの一体化部材の脚部を同様に半田付け
し、Ｒ、Ｇ、Ｂ光のレジストレーション調整が達成され
る。At the time of integration, each light valve 6R, 6R
It is necessary to match the pixels of G and 6B, that is, to perform registration adjustment. The registration is adjusted when the legs of the first light valve mounting member and the second mounting member are soldered and integrated. In FIG. 1, only the light for B light is integrated, but actually, it is better to start with the light for G light. That is, first, the first integrated members 104Ga and 10Ga
The 4Gb legs have G light valve 7G and 1 /
The legs of the second mounting member of the member integrating the four-wavelength phase plate 9G are fixed by soldering. Next, one of the light valves for R light or B light and the leg of the 1/4 wavelength phase plate integrated member are soldered so as to match the pixels of the projected image of the light valve for G light. To achieve. Next, the legs of the remaining integrated members are soldered in the same manner, and the registration adjustment of the R, G, and B lights is achieved.

【００７２】このレジストレーション調整が達成された
後で、次に各色の１／４波長位相板の光軸調整を行う。
前述の様に、各色光用の１／４波長位相板９Ｒ、９Ｇ、
９Ｂはそれぞれホルダー部材１０７Ｒ、１０７Ｇ、１０
７Ｂに取り付けられて一体化されているが、ホルダー部
材１０７の突起部の先端部１０７ｂは、各色光用の一体
化部材中の光遮光部材に設けられた円弧状穴の端面に弾
性をもって押し付けられている。穴から反対面に先端部
を突出した構成となっているが、突出部を円弧状穴に沿
って動かすことにより、１／４波長板波長位相板の光軸
調整を行うことができる。After the registration adjustment is achieved, the optical axis of the quarter-wave phase plate for each color is adjusted.
As described above, quarter-wave phase plates 9R, 9G for each color light,
9B are holder members 107R, 107G, 10
7B, the front end portion 107b of the protrusion of the holder member 107 is elastically pressed against the end face of the arc-shaped hole provided in the light shielding member in the integrated member for each color light. ing. Although the tip has a configuration protruding from the hole to the opposite surface, the optical axis of the quarter-wave plate wavelength phase plate can be adjusted by moving the protrusion along the arc-shaped hole.

【００７３】前記の１／４波長位相板の光軸調節は、第
３実施の形態とほぼ同じであるが本実施の形態では、選
択決定された位置において、先端部と円弧状穴部とは接
着剤で固着させ、１／４波長位相板を固定する。 （第７実施の形態）前記第４の実施の形態の図２、３を
引用した各色光ライトバルブと１／４波長位相板及びこ
れらを保持する方法に関する説明までは同一である。The adjustment of the optical axis of the quarter-wave phase plate is substantially the same as that of the third embodiment. The １ ／ wavelength phase plate is fixed with an adhesive. (Seventh Embodiment) The description of the fourth embodiment is the same up to the description of each color light valve, the quarter-wave phase plate, and the method of holding them, with reference to FIGS.

【００７４】前記のライトバルブ第１取り付け部材の脚
部と半田付けされる脚部を有するのは本実施形態では、
図２の光遮光部材が兼用し、前実施形態と同様に両部材
を半田付けして固定し各色光用のライトバルブのレジス
トレーション調節を実施し、その後で、光遮光部材の円
弧穴部から後ろ側に飛び出した、位相ホルダーの先端部
を動かして１／４波長位相板を回転させて最もコントラ
ストの良好となる位置にて当該先端部と円弧穴部を接着
固定させる。In this embodiment, the light valve first mounting member has a leg portion to be soldered to the leg portion.
The light shielding member of FIG. 2 is also used, and both members are soldered and fixed in the same manner as in the previous embodiment to perform registration adjustment of the light valve for each color light, and thereafter, through the arc hole of the light shielding member. The front end of the phase holder, which protrudes to the rear side, is moved to rotate the quarter-wave phase plate, and the front end and the arc hole are bonded and fixed at the position where the contrast is best.

【００７５】本実施形態の投射型表示装置ではライトバ
ルブ１６Ｒと１６Ｇが近接する構成を取るために、前記
ライトバルブ１６Ｒと１６Ｇと１／４波長位相板を取り
付けた第２取り付け部材は図５に示すように、互いに上
下逆にした配置とすることにより部材の干渉を防止する
構成とした。In the projection type display device of this embodiment, since the light valves 16R and 16G are close to each other, the second mounting member to which the light valves 16R and 16G and the quarter-wave phase plate are mounted is shown in FIG. As shown in the figure, the arrangement is made upside down so as to prevent interference between members.

【００７６】[0076]

【発明の効果】投射像のコントラストが向上し、より鮮
明な像が得られるようになる。As described above, the contrast of the projected image is improved, and a clearer image can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図１】は、本発明の投射型表示装置の概略の構成図で
ある。FIG. 1 is a schematic configuration diagram of a projection display device of the present invention.

【図２】は、本発明にて採用したライトバルブと１／４
波長位相板の一体化を説明する概略の分解構成図であ
る。FIG. 2 is a diagram showing a light valve and a quarter of the light valve employed in the present invention.
FIG. 3 is a schematic exploded configuration diagram illustrating integration of a wavelength phase plate.

【図３】は、本発明に関わるライトバルブと１／４波長
位相板の一体化部材の概略の斜視組立図である。FIG. 3 is a schematic perspective assembly view of an integrated member of a light valve and a quarter-wave phase plate according to the present invention.

【図４】は、実施の形態で採用した投射型表示装置の概
略の構成図である。FIG. 4 is a schematic configuration diagram of a projection display device adopted in the embodiment.

【図５】は、実施の形態で説明する装置の概略の分解構
成図である。FIG. 5 is a schematic exploded configuration diagram of the device described in the embodiment.

【図６】は、実施の形態で採用した投射型表示装置の概
略の構成図である。FIG. 6 is a schematic configuration diagram of a projection display device adopted in the embodiment.

【図７】は、偏光ビームスプリタと複合プリズムの一体
化を説明する概略の分解構成図である。FIG. 7 is a schematic exploded view illustrating the integration of the polarizing beam splitter and the composite prism.

【図８】は、従来の投射型表示装置の構成を示す概略の
構成図である。FIG. 8 is a schematic configuration diagram showing a configuration of a conventional projection display device.

【図９】は、従来の１／４波長位相板の配置を説明する
概略の斜視組立図である。FIG. 9 is a schematic perspective assembly view illustrating the arrangement of a conventional quarter-wave phase plate.

【符号の説明】[Explanation of symbols]

１、１１ 光源 ６Ｒ、６Ｇ、６Ｂ、１２ 偏光ビームスプリッタ ７Ｒ、７Ｇ、７Ｂ、１６Ｒ、１６Ｇ、１６Ｂ 反射型ラ
イトバルブ ９Ｒ、９Ｇ、９Ｂ、１８Ｒ、１８Ｇ、１８Ｂ １／４波
長位相板 １０、１７ 投射レンズ1, 11 Light source 6R, 6G, 6B, 12 Polarizing beam splitter 7R, 7G, 7B, 16R, 16G, 16B Reflective light valve 9R, 9G, 9B, 18R, 18G, 18B Quarter-wave phase plate 10, 17 Projection lens

Claims (10)

【特許請求の範囲】[Claims] 【請求項１】 光源と、Ｒ（赤）光及びＧ（緑）光及び
Ｂ（青）光に色分解する色分解光学系と、各色光毎に配
置した偏光ビームスプリッタと、前記各色光毎に配置し
た反射型ライトバルブと、前記各色光用偏光ビームスプ
リッタと前記各色光用ライトバルブとの間に配置した１
／４波長位相板と、色合成光学系と、投射レンズを有す
る投射型表示装置において、前記ライトバルブと前記１
／４波長位相板と前記偏光ビームスプリッタは一体化さ
れ、該一体化は、前記偏光ビームスプリッタに取り付け
た第１一体化部材と、前記１／４波長位相板及び前記ラ
イトバルブを一体化した部材とを取り付けることにより
おこない、前記１／４波長位相板と前記ライトバルブを
一体化する一体化部材は、カバー部材と、１／４波長位
相板ホルダーと、該記１／４波長位相板ホルダーに固着
された１／４波長位相板と、光遮光板と、前記ライトバ
ルブと、前記ライトバルブが固着された背板を有し、前
記１／４波長位相板ホルダーはネジ部を有する突起部を
有し、前記カバー部材は円弧状穴を有し、前記１／４波
長位相板を取り付けた前記１／４波長位相板ホルダーは
１／４波長位相板と共に前記カバー部材中に前記カバー
部材の開口部より突起部を前記カバー部材外へ突出さ
せ、前記ホルダー部材は突起部ネジ部とカバー部材の円
弧状穴とを通して前記カバー部材をネジにて螺着固定さ
れ、前記前記ライトバルブと、前記１／４波長位相板及
び前記偏光ビームスプリッタが一体化された構成は、前
記偏光ビームスプリッタに取り付けた第１取り付け部材
と、前記１／４波長位相板及び前記ライトバルブの一体
化部材中の前記遮光板とを取り付けてなることを特徴と
する投射型表示装置。1. A light source, a color separation optical system for color separation into R (red) light, G (green) light and B (blue) light, a polarizing beam splitter arranged for each color light, And a reflection type light valve disposed between the polarization beam splitter for each color light and the light valve for each color light.
In a projection type display device having a 波長 wavelength phase plate, a color combining optical system, and a projection lens, the light valve and the 1
A quarter-wave phase plate and the polarization beam splitter are integrated, and the integration is performed by a first integrated member attached to the polarization beam splitter, and a member obtained by integrating the quarter-wave phase plate and the light valve. And the light valve is integrated with the cover member, the quarter-wave phase plate holder, and the quarter-wave phase plate holder. It has a fixed quarter-wave phase plate, a light shielding plate, the light valve, and a back plate to which the light valve is fixed, and the quarter-wave phase plate holder has a protrusion having a screw part. The cover member has an arc-shaped hole, and the quarter-wave phase plate holder to which the quarter-wave phase plate is attached is provided with an opening of the cover member in the cover member together with the quarter-wave phase plate. From department The raised portion is projected outside the cover member, and the holder member is screwed and fixed to the cover member with a screw through a projection screw portion and an arc-shaped hole of the cover member. The configuration in which the wavelength phase plate and the polarization beam splitter are integrated includes a first mounting member attached to the polarization beam splitter, and the light shielding plate in the integrated member of the quarter wavelength phase plate and the light valve. A projection type display device characterized by being attached with. 【請求項２】 光源と、偏光ビームスプリッタと、Ｒ
（赤）光及びＧ（緑）光及びＢ（青）光に分解する色分
解光学系と前記各色光を色合成する合成光学系とを兼用
する複数のプリズムからなる色分解合成光学系と、前記
各色光毎に配置した反射型ライトバルブと、前記色分解
合成プリズムと各色光用ライトバルブとの間に配置した
１／４波長位相板と、投射レンズを有する投射型表示装
置において、前記ライトバルブと、１／４波長位相板及
び前記複数のプリズムは一体化され、該一体化は、前記
プリズムに取り付けた第１ライトバルブ取り付け部材と
前記１／４波長位相板を一体化した部材とを取り付ける
ことにより行い、前記１／４波長位相板とライトバルブ
の一体化部材は、カバー部材と、１／４波長位相板ホル
ダーと、前記１／４波長板ホルダーに固着された１／４
波長位相板と、光遮光板と、ライトバルブと、前記ライ
トバルブが固着された背板とから構成され、前記１／４
波長位相板ホルダーはネジ部を具えた突起部を有し、前
記カバー部材は円弧状穴を有し、前記１／４波長位相板
を取り付けた前記１／４波長位相板ホルダーは１／４波
長位相板と共に、前記カバー部材中に前記カバー部材の
開口部より突起部をカバー部材外へ突出した構成にて配
置され、前記ホルダー部材は突起部ネジ部とカバー部材
の円弧状穴とを通して前記カバー部材をネジにて螺着固
定され、前記ライトバルブと、前記１／４波長位相板及
び前記偏光ビームスプリッタの一体化は、前記偏光ビー
ムスプリッタに取り付けた第１取り付け部材と、前記１
／４波長位相板と前記ライトバルブの一体化部材中の前
記遮光板とを取り付けて行うことを特徴とする投射型表
示装置。2. A light source, a polarizing beam splitter, and R
A color separation / synthesis optical system including a plurality of prisms that also serves as a color separation optical system that separates (red) light, G (green) light, and B (blue) light, and a synthesis optical system that performs color synthesis of the respective color lights; A projection type display device having a reflection type light valve arranged for each color light, a quarter wavelength phase plate arranged between the color separation / combination prism and the light valve for each color light, and a projection lens; The valve, the quarter-wave phase plate and the plurality of prisms are integrated, and the integration includes a first light valve mounting member mounted on the prism and a member obtained by integrating the quarter-wave phase plate. The integrated member of the quarter-wave phase plate and the light valve includes a cover member, a quarter-wave phase plate holder, and the quarter-wave plate fixed to the quarter-wave plate holder.
A wavelength phase plate, a light shielding plate, a light valve, and a back plate to which the light valve is fixed;
The wavelength phase plate holder has a protrusion having a screw portion, the cover member has an arc-shaped hole, and the quarter wavelength phase plate holder on which the quarter wavelength phase plate is mounted is a quarter wavelength. Along with the phase plate, the cover is disposed in the cover with a protrusion projecting from the opening of the cover to the outside of the cover, and the holder is provided with the cover through a protrusion screw and an arc-shaped hole of the cover. The member is screwed and fixed with a screw, and the light valve, the 波長 wavelength phase plate and the polarization beam splitter are integrated with each other by a first attachment member attached to the polarization beam splitter,
A projection type display device, wherein a / 4 wavelength phase plate and the light shielding plate in an integrated member of the light valve are attached. 【請求項３】 光源と、偏光ビームスプリッタと、Ｒ
（赤）光及びＧ（緑）光及びにＢ（青）光に分解する色
分解光学系と前記各色光を色合成する合成光学系とを兼
用する複数のプリズムからなる色分解合成光学系と、前
記各色光毎に配置した反射型ライトバルブと、前記色分
解合成プリズムと各色光用ライトバルブとの間に配置し
た１／４波長位相板と、投射レンズを有する投射型表示
装置において、前記ライトバルブと、１／４波長位相板
及び前記複数のプリズムは一体化され、該一体化は、前
記プリズムに取り付けた第１ライトバルブ取り付け部材
と前記１／４波長位相板を一体化した部材とを取り付け
ることにより行い、前記１／４波長位相板とライトバル
ブの一体化部材は、カバー部材と、１／４波長位相板ホ
ルダーと、前記１／４波長板ホルダーに固着された１／
４波長位相板と、光遮光板と、ライトバルブと、前記ラ
イトバルブが固着された背板を有し、前記１／４波長位
相板ホルダーはネジ部を有する突起部を有し、前記カバ
ー部材は円弧状穴を有し、前記１／４波長位相板を取り
付けた前記１／４波長位相板ホルダーは前記１／４波長
位相板と共に、前記カバー部材中に前記カバー部材の開
口部より突起部を前記カバー部材外へ突出した構成にて
配置され、前記ホルダー部材は突起部ネジ部とカバー部
材の円弧状穴とを通して前記カバー部材をネジにて螺着
固定され、前記ライトバルブと、前記１／４波長位相板
及び前記偏光ビームスプリッタの一体化は、前記偏光ビ
ームスプリッタに取り付けた第１取り付け部材と、前記
１／４波長位相板と前記ライトバルブの一体化部材中の
前記カバー部材とを取り付けて行うことを特徴とする投
射型表示装置。3. A light source, a polarizing beam splitter, and R
A color separation / synthesis optical system composed of a plurality of prisms which also serves as a color separation optical system for separating (red) light, G (green) light and B (blue) light into light, and a synthesis optical system for color combining the respective color lights. A reflection type light valve disposed for each color light, a 波長 wavelength phase plate disposed between the color separation / combination prism and the light valve for each color light, and a projection display device having a projection lens, A light valve, a 1/4 wavelength phase plate and the plurality of prisms are integrated, and the integration is performed by integrating a first light valve mounting member attached to the prism and a member integrating the 1/4 wavelength phase plate. The integrated member of the 1/4 wavelength phase plate and the light valve is provided with a cover member, a 1/4 wavelength phase plate holder, and a 1/4 wavelength plate fixed to the 1/4 wavelength plate holder.
A four-wavelength phase plate, a light-shielding plate, a light valve, and a back plate to which the light valve is fixed; the quarter-wave phase plate holder having a protrusion having a screw portion; Has an arc-shaped hole, and the quarter-wave phase plate holder to which the quarter-wave phase plate is attached, together with the quarter-wave phase plate, has a projection formed in the cover member from an opening of the cover member. Is disposed in a configuration protruding out of the cover member. The cover member is screwed and fixed to the holder member through a protrusion screw portion and an arc-shaped hole of the cover member. The integration of the quarter-wave phase plate and the polarizing beam splitter includes a first mounting member attached to the polarizing beam splitter, and the cover member in the integrated member of the quarter-wave phase plate and the light valve. Projection display device which is characterized in that attached. 【請求項４】 前記１／４波長位相板ホルダー及び前記
カバー部材は、前記ホルダー部材の先端部ネジ部への螺
着前に前記カバー部の円弧穴部に嵌入させたネジを前記
穴部に沿って移動し前記１／４波長位相板を回転させ、
投射像のコントラストを調節することを特徴とする請求
項１又は２又は３に記載の投射型表示装置の投射像のコ
ントラスト調節方法。4. The holder according to claim 1, wherein the quarter-wave phase plate holder and the cover member include, in the hole portion, a screw fitted into an arc hole of the cover portion before screwing the holder member to a screw portion at a tip end. Moving along and rotating the quarter-wave phase plate,
The method for adjusting the contrast of a projection image of a projection display device according to claim 1, wherein the contrast of the projection image is adjusted. 【請求項５】 光源と、Ｒ（赤）光及びＧ（緑）光及び
Ｂ（青）光に色分解する色分解光学系と、各色光毎に配
置した偏光ビームスプリッタと、前記各色光毎に配置し
た反射型ライトバルブと、前記各色光用偏光ビームスプ
リッタと前記各色光用ライトバルブとの間に配置した１
／４波長位相板と、色合成光学系と、投射レンズを有す
る投射型表示装置において、前記ライトバルブと、前記
１／４波長位相板と前記偏光ビームスプリッタは一体化
され、該一体化は前記ライトバルブに取り付けた第１ラ
イトバルブ取り付け部材と前記１／４波長位相板を一体
化した部材とを取り付けることにより行い、前記１／４
波長位相板とライトバルブとを一体化する一体化部材
は、カバー部材と、１／４波長位相板ホルダーと、該記
１／４波長板ホルダーに固着された１／４波長位相板
と、光遮光板と、前記ライトバルブと、前記ライトバル
ブが固着された背板を有し、前記１／４波長位相板ホル
ダーは先端部を折り曲げた突起部を有し、前記光遮光部
材は円弧状穴を有し、前記１／４波長位相板を取り付け
た前記１／４波長位相板ホルダーは、前記１／４波長位
相板と共に前記カバー部材中に前記カバー部材の開口部
より突起部を前記カバー部材外へ突出した構成を有し、
前記ホルダー部材突起部の先端折り曲げ部は、前記光遮
光部材の円弧状穴に挿入され、前記前記ライトバルブ
と、前記１／４波長位相板及び前記偏光ビームスプリッ
タが一体化された構成は、前記偏光ビームスプリッタに
取り付けた第１取り付け部材と、前記１／４波長位相板
及び前記ライトバルブの一体化部材中の前記遮光板とを
取り付けてなることを特徴とする投射型表示装置。5. A light source, a color separation optical system for color separation into R (red) light, G (green) light and B (blue) light, a polarizing beam splitter arranged for each color light, and And a reflection type light valve disposed between the polarization beam splitter for each color light and the light valve for each color light.
In a projection type display device having a 波長 wavelength phase plate, a color combining optical system, and a projection lens, the light valve, the 波長 wavelength phase plate, and the polarization beam splitter are integrated, and the integration is performed as described above. This is performed by attaching a first light valve attachment member attached to the light valve and a member obtained by integrating the quarter wavelength phase plate.
The integrated member that integrates the wavelength phase plate and the light valve includes a cover member, a quarter-wave phase plate holder, a quarter-wave phase plate fixed to the quarter-wave plate holder, and light. A light-shielding plate, the light valve, and a back plate to which the light valve is fixed; the quarter-wave phase plate holder having a protrusion with a bent end portion; The quarter-wave phase plate holder having the quarter-wave phase plate attached thereto, together with the quarter-wave phase plate, has a projecting portion from an opening of the cover member in the cover member. Has a configuration that protrudes outside,
The bent end portion of the holder member protrusion is inserted into an arc-shaped hole of the light shielding member, and the light valve, the １ ／ wavelength phase plate, and the polarization beam splitter are integrated with each other. A projection display device comprising: a first attachment member attached to a polarization beam splitter; and the light shielding plate in an integrated member of the quarter-wave phase plate and the light valve. 【請求項６】 光源と、偏光ビームスプリッタと、Ｒ
（赤）光及びＧ（緑）光及びＢ（青）光に分解する色分
解光学系と前記各色光を色合成する合成光学系とを兼用
する複数のプリズムからなる色分解合成光学系と、前記
各色光毎に配置した反射型ライトバルブと、前記色分解
合成プリズムと各色光用ライトバルブとの間に配置した
１／４波長位相板と、投射レンズを有する投射型表示装
置において、前記ライトバルブと、前記１／４波長位相
板及び前記複数のプリズムは一体化され、該一体化は、
前記プリズムに取り付けた第１ライトバルブ取り付け部
材と前記１／４波長位相板を一体化した部材とを取り付
けることにより行い、前記１／４波長位相板とライトバ
ルブの一体化部材は、カバー部材と、１／４波長位相板
ホルダーと、前記１／４波長板と、光遮光部材と、前記
ライトバルブと、背板を有し、前記１／４波長位相板ホ
ルダーは先端部を折り曲げた突起部を有し、前記光遮光
部材は円弧状穴を有し、前記１／４波長位相板を取り付
けた前記１／４波長位相板ホルダーは前記１／４波長位
相板と共に、前記カバー部材中の開口部より突起部を前
記カバー部材外へ突出させ、前記突起部の先端折り曲げ
部材は、前記円弧状穴に挿入され、前記ライトバルブ
と、前記１／４波長位相板及び前記偏光ビームスプリッ
タの一体化は、前記偏光ビームスプリッタに取り付けた
第１取り付け部材と、前記１／４波長位相板と前記ライ
トバルブの一体化部材中の前記遮光部材とを取り付けて
行うことを特徴とする投射型表示装置。6. A light source, a polarizing beam splitter, and R
A color separation / synthesis optical system including a plurality of prisms that also serves as a color separation optical system that separates (red) light, G (green) light, and B (blue) light, and a synthesis optical system that performs color synthesis of the respective color lights; A projection type display device having a reflection type light valve arranged for each color light, a quarter wavelength phase plate arranged between the color separation / combination prism and the light valve for each color light, and a projection lens; The valve, the 1/4 wavelength phase plate and the plurality of prisms are integrated, and the integration is
This is performed by attaching a first light valve attachment member attached to the prism and a member obtained by integrating the 1/4 wavelength phase plate. The integrated member of the 1/4 wavelength phase plate and the light valve includes a cover member and , A quarter-wave phase plate holder, the quarter-wave plate, a light shielding member, the light valve, and a back plate. The light shielding member has an arc-shaped hole, and the quarter-wave phase plate holder with the quarter-wave phase plate attached thereto, together with the quarter-wave phase plate, has an opening in the cover member. A projection is projected out of the cover member from the portion, and a tip bending member of the projection is inserted into the arc-shaped hole, and the light valve is integrated with the quarter-wave phase plate and the polarization beam splitter. Is the A first mounting member attached to the light beam splitter, the projection display apparatus and performs in a quarter wave plate mounted between said light blocking member in the integrated member of the light valve. 【請求項７】 前記１／４波長板ホルダー部材の突起部
先端折り曲げ部を前記光遮光部材の前記円弧状穴部に挿
入する前に前記円弧状穴部に沿って移動させ前記１／４
波長位相板を回転させ、投射像のコントラストを調節す
ることを特徴とする請求項６に記載の投射型表示装置の
投射像のコントラスト調節方法。7. The quarter-wave plate holder member is moved along the arc-shaped hole portion before the bent-end portion of the projection portion is inserted into the arc-shaped hole portion of the light shielding member before being inserted into the arc-shaped hole portion.
7. The method according to claim 6, wherein the contrast of the projected image is adjusted by rotating the wavelength phase plate. 【請求項８】 光源と、Ｒ（赤）光及びＧ（緑）光及び
Ｂ（青）光に色分解する色分解光学系と、各色光毎に配
置した偏光ビームスプリッタと、前記各色光毎に配置し
た反射型ライトバルブと、前記各色光用偏光ビームスプ
リッタと前記各色光用ライトバルブとの間に配置した１
／４波長位相板と、色合成光学系と、投射レンズを有す
る投射型表示装置において、前記ライトバルブと前記１
／４波長位相板と前記偏光ビームスプリッタは一体化さ
れ、前記一体化は前記ライトバルブに取り付けた第１ラ
イトバルブ取り付け部材と前記１／４波長位相板を一体
化した部材とを取り付けることにより行い、前記１／４
波長位相板とライトバルブとを一体化する一体化部材
は、カバー部材及び１／４波長位相板ホルダー及び該記
１／４波長板ホルダーに固着された１／４波長位相板及
び光遮光板及び前記ライトバルブ及び前記ライトバルブ
が固着された背板を有し、前記１／４波長位相板ホルダ
ーは先端部を折り曲げた突起部を有し、該突起部の先端
折り曲げ部は前記光遮光部材に形成された穴部を通して
前記遮光部材の背部に突出しており、前記遮光部材は、
前記第１ライトバルブ取り付け部材に対する取り付け部
材を兼ねることを特徴とする投射型表示装置。8. A light source, a color separation optical system for color separation into R (red) light, G (green) light and B (blue) light, a polarizing beam splitter arranged for each color light, And a reflection type light valve disposed between the polarization beam splitter for each color light and the light valve for each color light.
In a projection type display device having a 波長 wavelength phase plate, a color combining optical system, and a projection lens, the light valve and the 1
The 波長 wavelength phase plate and the polarizing beam splitter are integrated, and the integration is performed by mounting a first light valve mounting member mounted on the light valve and a member integrating the 波長 wavelength phase plate. , The 1/4
The integrated member for integrating the wavelength phase plate and the light valve includes a cover member, a quarter wavelength phase plate holder, a quarter wavelength phase plate and a light shielding plate fixed to the quarter wavelength plate holder, and The light valve has a back plate to which the light valve is fixed, and the quarter-wave phase plate holder has a protrusion having a bent front end, and the bent end of the protrusion is attached to the light shielding member. Projecting to the back of the light shielding member through the formed hole, the light shielding member,
A projection display device, which also serves as a mounting member for the first light valve mounting member. 【請求項９】 光源と、偏光ビームスプリッタと、Ｒ
（赤）光及びＧ（緑）光及びＢ（青）光に分解する色分
解光学系と前記各色光を色合成する合成光学系とを兼用
する複数のプリズムからなる色分解合成光学系と、前記
各色光毎に配置した反射型ライトバルブと、前記色分解
合成プリズムと各色光用ライトバルブとの間に配置した
１／４波長位相板と、投射レンズを有する投射型表示装
置において、前記ライトバルブと、１／４波長位相板及
び前記複数のプリズムは一体化され、該一体化は、前記
プリズムに取り付けた第１ライトバルブ取り付け部材と
前記１／４波長位相板を一体化した部材とを取り付ける
ことにより行い、前記１／４波長位相板とライトバルブ
の一体化部材は、カバー部材と、１／４波長位相板ホル
ダーと、前記１／４波長板と、光遮光部材と、前記ライ
トバルブと、背板とから構成され、前記１／４波長位相
板ホルダーは先端部を折り曲げた突起部を有し、前記光
遮光部材を前記光遮光部材に形成された穴部を通して前
記光遮光部の背部に突出させ、前記光遮光部材は前記第
１ライトバルブ取り付け部材に対する取り付け部材を兼
用することを特徴とする投射型表示装置。9. A light source, a polarizing beam splitter, and R
A color separation / synthesis optical system including a plurality of prisms that also serves as a color separation optical system that separates (red) light, G (green) light, and B (blue) light, and a synthesis optical system that performs color synthesis of the respective color lights; A projection type display device having a reflection type light valve arranged for each color light, a quarter wavelength phase plate arranged between the color separation / combination prism and the light valve for each color light, and a projection lens; The bulb, the quarter-wave phase plate and the plurality of prisms are integrated, and the integration includes a first light valve mounting member mounted on the prism and a member integrating the quarter-wave phase plate. The integrated member of the quarter-wave phase plate and the light valve includes a cover member, a quarter-wave phase plate holder, the quarter-wave plate, a light shielding member, and the light valve. And the backboard Wherein the quarter-wave phase plate holder has a projection with a tip bent, and the light-blocking member is projected to the back of the light-blocking portion through a hole formed in the light-blocking member, The light-shielding member also serves as an attachment member for the first light valve attachment member. 【請求項１０】 請求項８又は９に記載の投射型表示装
置を用い、前記１／４波長位相板を光軸を中心に回転さ
せて投射像のコントラストを調整する方法において、前
記光遮光部材の背部に突出させた前記１／４波長位相ホ
ルダーの先端部を前記穴部に沿って移動させることによ
り前記１／４波長位相板を回転させ、投射像のコントラ
ストを調節する方法。10. A method for adjusting the contrast of a projected image by rotating the quarter-wave phase plate around an optical axis using the projection display device according to claim 8 or 9. A method of adjusting the contrast of the projected image by rotating the quarter-wave phase plate by moving the tip of the quarter-wave phase holder protruding from the back of the holder along the hole.
JP2000039723A 2000-02-14 2000-02-14 Projection type display device and method for adjusting contrast Pending JP2001228534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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JP2007011301A (en) * 2005-06-01 2007-01-18 Canon Inc Optical modulation element unit, projection optical unit, and image projection apparatus
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US7532407B2 (en) 2005-08-09 2009-05-12 Hitachi, Ltd. Projection display
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US7114811B2 (en) 2003-10-06 2006-10-03 Seiko Epson Corporation Optical assembly and projector
US7466368B2 (en) 2004-09-17 2008-12-16 Canon Kabushiki Kaisha Image projection apparatus and adjusting method used for the same
JP2006085077A (en) * 2004-09-17 2006-03-30 Canon Inc Projection type image display device and adjusting method used therefor
JP2007011301A (en) * 2005-06-01 2007-01-18 Canon Inc Optical modulation element unit, projection optical unit, and image projection apparatus
JP2007025153A (en) * 2005-07-14 2007-02-01 Sony Corp Liquid crystal panel block and liquid crystal projector apparatus
US7532407B2 (en) 2005-08-09 2009-05-12 Hitachi, Ltd. Projection display
US7982958B2 (en) 2005-08-09 2011-07-19 Hitachi, Ltd. Projection display
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CN103207506B (en) * 2005-08-09 2015-04-01 日立麦克赛尔株式会社 Projection display
JP2007108735A (en) * 2005-09-16 2007-04-26 Victor Co Of Japan Ltd Reflection type projection display apparatus
CN102135717A (en) * 2010-01-26 2011-07-27 精工爱普生株式会社 Projector
CN102135717B (en) * 2010-01-26 2012-12-12 精工爱普生株式会社 Projector
CN109116668A (en) * 2016-01-19 2019-01-01 精工爱普生株式会社 Optical devices, light supply apparatus and projector
CN109116668B (en) * 2016-01-19 2020-12-08 精工爱普生株式会社 Optical device, light source device, and projector

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