JP4723276B2 - Projection-type image display device, optical unit, and light valve fixing structure in projection-type image display device - Google Patents

Projection-type image display device, optical unit, and light valve fixing structure in projection-type image display device Download PDF

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JP4723276B2
JP4723276B2 JP2005119302A JP2005119302A JP4723276B2 JP 4723276 B2 JP4723276 B2 JP 4723276B2 JP 2005119302 A JP2005119302 A JP 2005119302A JP 2005119302 A JP2005119302 A JP 2005119302A JP 4723276 B2 JP4723276 B2 JP 4723276B2
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light valve
prism
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projection
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JP2006301046A (en
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恵 藏知
真朗 乾
理之 芳野
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Hitachi Ltd
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Description

本発明は、液晶パネル等のライトバルブを用いた投射型映像表示装置に係り、特に、該ライトバルブを色合成用プリズム側に取付ける技術に関する。   The present invention relates to a projection type image display apparatus using a light valve such as a liquid crystal panel, and more particularly to a technique for mounting the light valve on the color composition prism side.

本発明に関連する従来技術としては、例えば、特開２００１−５６５１６号公報（特許文献１）、特開２００２−２６８０３２号公報（特許文献２）及び特開２００３−７５９１２号公報（特許文献３）に記載されたものがある。特開２００１−５６５１６号公報には、投射型カラー画像表示装置において、合成画像の画質を低下させることなく、簡単な構成で液晶パネルを位置決め、固定するために、液晶パネル（正確には液晶パネルを保持する部材も含む構成とされている）１４ａ、１４ｂ、１４ｃがそれぞれ、調整板４４ａ、４４ｂ、４４ｃにネジ止めされ、該調整板４４ａ、４４ｂ、４４ｃはさらに、該調整板４４ａ、４４ｂ、４４ｃのそれぞれに設けた穴４６に、クロスダイクロイックプリズム１５側の固定枠４３ａ、４３ｂ、４３ｃの四隅に突設した支持片４５が挿入された状態で、接着剤により、該固定枠４３ａ、４３ｂ、４３ｃ側に固定されるとした構成が記載され、特開２００２−２６８０３２号公報には、液晶プロジェクタにおいて、低コスト構成でクロスプリズムと液晶パネルとを固定するために、液晶パネル（正確には液晶パネルを保持する部材も含む構成とされている）５が、液晶パネル取付けプレート４にネジ止めされ、該取付けプレート４もさらに、該取付けプレート４に設けられた穴に挿入された固定用ネジが、クロスプリズム２側の合成樹脂製プレート１、３側のネジ穴に挿入されることで、該合成樹脂製プレート１、３側に固定されるとした構成が記載され、また、特開２００３−７５９１２号公報には、液晶プロジェクターにおいて、光学プリズムユニットの部品点数を削減しかつ放熱性を改善するために、ダイクロイックプリズム２１側にパネル固定部材２７を設け、該パネル固定部材２７のパネル固定枠部２７ａに、熱伝導率の高い透明ガラス基板２８及び放熱フィン３１、３２を取付けた液晶パネル２２、２３、２４を、熱伝導率の高い接着剤で固定するとした構成が記載されている。   As conventional techniques related to the present invention, for example, JP 2001-56516 A (Patent Document 1), JP 2002-268032 A (Patent Document 2), and JP 2003-75912 A (Patent Document 3). There is what is described in. Japanese Patent Laid-Open No. 2001-56516 discloses a liquid crystal panel (to be precise, a liquid crystal panel) in order to position and fix the liquid crystal panel with a simple configuration without reducing the image quality of the composite image in the projection color image display device. 14a, 14b, and 14c are screwed to the adjustment plates 44a, 44b, and 44c, respectively, and the adjustment plates 44a, 44b, and 44c are further connected to the adjustment plates 44a, 44b, and 44c, respectively. With the support pieces 45 protruding from the four corners of the fixing frames 43a, 43b, 43c on the cross dichroic prism 15 side being inserted into the holes 46 provided in the respective 44c, the fixing frames 43a, 43b, A configuration that is fixed to the 43c side is described, and Japanese Patent Application Laid-Open No. 2002-268032 discloses a low-cost configuration in a liquid crystal projector. In order to fix the cross prism and the liquid crystal panel, a liquid crystal panel (correctly including a member for holding the liquid crystal panel) 5 is screwed to the liquid crystal panel mounting plate 4, and the mounting plate 4 is also Furthermore, the fixing screw inserted into the hole provided in the mounting plate 4 is inserted into the synthetic resin plate 1 on the cross prism 2 side and the screw hole on the 3 side, whereby the synthetic resin plate 1, In the liquid crystal projector, the dichroic prism 21 is described in order to reduce the number of parts of the optical prism unit and improve the heat dissipation. A panel fixing member 27 is provided on the side, and a transparent glass substrate 28 having a high thermal conductivity and a heat dissipation frame are provided on the panel fixing frame portion 27a of the panel fixing member 27. The liquid crystal panel 22, 23 and 24 fitted with down 31 and 32, the configuration was fixed by high thermal conductivity adhesive agent.

特開２００１−５６５１６号公報JP 2001-56516 A 特開２００２−２６８０３２号公報JP 2002-268032 A 特開２００３−７５９１２号公報JP 2003-75912 A

上記従来技術のうち、特開２００１−５６５１６号公報記載の技術では、液晶パネル（液晶パネルを保持する部材も含む）１４ａ、１４ｂ、１４ｃを、調整板４４ａ、４４ｂ、４４ｃに取付けるために複数のネジが必要である上、さらに、調整板４４ａ、４４ｂ、４４ｃをクロスダイクロイックプリズム１５側に固定するために、四隅に突設した支持片４５を有する複雑な構成の固定枠４３ａ、４３ｂ、４３ｃが必要である。このため、該技術においては、該液晶パネル１４ａ、１４ｂ、１４ｃの該クロスダイクロイックプリズム１５側への取付け部における低コスト化を図りにくい。また、液晶パネル１４ａ、１４ｂ、１４ｃを、調整板４４ａ、４４ｂ、４４ｃと固定枠４３ａ、４３ｂ、４３とを介してクロスダイクロイックプリズム１５側に固定する構成のため、組立て・調整後に使用環境の温度変化等によって、液晶パネル１４ａ、１４ｂ、１４ｃがクロスダイクロイックプリズム１に対し位置ずれを起こし易い。さらに、液晶パネル１４ａ、１４ｂ、１４ｃとクロスダイクロイックプリズム１５との間に冷却用の通風路も形成しにくいと考えられる。
特開２００２−２６８０３２号公報記載の技術では、液晶パネル（液晶パネルを保持する部材も含む）５を、液晶パネル取付けプレート４に取付けるための複数のネジと、該取付けプレート４をクロスプリズム２側の合成樹脂製プレート１、３側に固定するための複数の固定用ネジが必要であり、さらに、該クロスダイクロイックプリズム１５側には該合成樹脂製プレート１、３が必要である。このため、該技術においても、液晶パネル５のクロスプリズム２側への取付け部における十分な低コスト化は図りにくいと考えられる。また、液晶パネル５を、取付けプレート４及び合成樹脂製プレート１、３を介してクロスプリズム２側に固定する構成のため、やはり、組立て・調整後に使用環境の温度変化等によって、液晶パネル５がクロスプリズム２に対し位置ずれを起こし易い。さらに、液晶パネル５とクロスプリズム２との間には冷却用の通風路も形成しにくい。
特開２００３−７５９１２号公報記載の技術では、液晶パネル２２、２３、２４に取付ける熱伝導率の高い透明ガラス基板２８や放熱フィン３１、３２が必要であり、さらに、ダイクロイックプリズム２１側にもパネル固定部材２７を設ける構成のため、液晶パネル２２、２３、２４のダイクロイックプリズム２１側への取付け部における十分な低コスト化や小型化は図りにくいと考えられる。 Among the above-described conventional techniques, in the technique described in Japanese Patent Laid-Open No. 2001-56516, a plurality of liquid crystal panels (including members for holding a liquid crystal panel) 14a, 14b, and 14c are attached to the adjustment plates 44a, 44b, and 44c. In addition to the need for screws, in order to fix the adjustment plates 44a, 44b, 44c to the cross dichroic prism 15 side, there are fixed frames 43a, 43b, 43c having complicated structures having support pieces 45 projecting at the four corners. is necessary. For this reason, in this technique, it is difficult to reduce the cost at the attachment portion of the liquid crystal panels 14a, 14b, 14c to the cross dichroic prism 15 side. Further, since the liquid crystal panels 14a, 14b, and 14c are fixed to the cross dichroic prism 15 side through the adjustment plates 44a, 44b, and 44c and the fixing frames 43a, 43b, and 43, the temperature of the usage environment after assembly and adjustment Due to changes or the like, the liquid crystal panels 14 a, 14 b, and 14 c are likely to be displaced with respect to the cross dichroic prism 1. Further, it is considered that it is difficult to form a cooling air passage between the liquid crystal panels 14 a, 14 b, 14 c and the cross dichroic prism 15.
In the technique described in Japanese Patent Laid-Open No. 2002-268032, a plurality of screws for attaching the liquid crystal panel (including a member for holding the liquid crystal panel) 5 to the liquid crystal panel attachment plate 4 and the attachment plate 4 on the cross prism 2 side. A plurality of fixing screws for fixing to the synthetic resin plates 1 and 3 side are required, and further, the synthetic resin plates 1 and 3 are required on the cross dichroic prism 15 side. For this reason, it is considered that even in this technique, it is difficult to sufficiently reduce the cost of the attachment portion of the liquid crystal panel 5 to the cross prism 2 side. In addition, since the liquid crystal panel 5 is fixed to the cross prism 2 side via the mounting plate 4 and the synthetic resin plates 1 and 3, the liquid crystal panel 5 is also changed by the temperature change of the usage environment after assembly and adjustment. Position misalignment is likely to occur with respect to the cross prism 2. Further, it is difficult to form a cooling air passage between the liquid crystal panel 5 and the cross prism 2.
In the technique described in Japanese Patent Laid-Open No. 2003-75912, the transparent glass substrate 28 and the heat radiation fins 31 and 32 having high thermal conductivity to be attached to the liquid crystal panels 22, 23 and 24 are necessary, and the panel is also provided on the dichroic prism 21 side. Due to the configuration in which the fixing member 27 is provided, it is considered difficult to sufficiently reduce the cost and the size of the mounting portion of the liquid crystal panels 22, 23, 24 on the dichroic prism 21 side.

本発明の課題点は、上記従来技術の状況に鑑み、投射型映像表示装置において、液晶パネル等のライトバルブを、色合成用のプリズムに対して、低コストの簡易な構成によって取付けられるようにするとともに、使用環境の温度変化等に対しても、例えばコンバージェンス調整後の該プリズムに対する位置ずれの増大を抑えられるようにすることである。
本発明の目的は、かかる課題点を解決し、投射型映像表示装置において、組立て作業をし易く、低コスト化が図れ、かつ、画質性能を確保可能なライトバルブの取付け技術を提供することにある。 In view of the above-described prior art, the problem of the present invention is that in a projection-type image display device, a light valve such as a liquid crystal panel can be attached to a prism for color synthesis with a simple structure at low cost. At the same time, it is also possible to suppress an increase in positional deviation with respect to the prism after the convergence adjustment, for example, with respect to a temperature change in the use environment.
An object of the present invention is to provide a light valve mounting technique that solves such problems and facilitates assembly work, reduces costs, and ensures image quality performance in a projection display apparatus. is there.

上記課題点を解決するために、本発明では、液晶パネルなどのライトバルブを保持部で一体状に保持して成るライトバルブ部材を、偏光板や光学補償素子を保持するための保持部材を介し、色合成用のプリズムに取付ける構成とする。この構成において、上記ライトバルブ部材は、上記保持部に複数の取付け用貫通孔を備え、上記保持部材は、１個の独立した金属材で構成され、上記ライトバルブ部材の取付け用貫通孔に挿入される複数の突起部を備え、該取付け用貫通孔内に該突起部が挿入された状態で、該ライトバルブ部材と結合される。また、該保持部材は、上記プリズムの上面部側及び下面部側に突出した取付け部を備え、該取付け部により該プリズムの上面部及び下面部に固定される。また、さらに、該保持部材は、上記プリズムのダイクロイック膜平面に沿う方向の両端部に開口を有し、上記偏光板や光学補償素子が設けられる空間部に通風路が形成される構成とする。
具体的には、本発明は、上記構成を基本的構成要件とした投射型映像表示装置、光学ユニット及び投射型映像表示装置におけるライトバルブの固定構造である。 To solve the above problem points, in the present invention, a light valve member formed by integrally held like a light valve such as a liquid crystal panel holder, via a holding member for holding the polarizing plate and the optical compensation element and, a structure for mounting a prism for color synthesis. In this configuration, the light valve member includes a plurality of mounting through holes in the holding portion, and the holding member is formed of one independent metal material and is inserted into the mounting through hole of the light valve member. comprising a plurality of protrusions which are, in a state where the protrusion portion in the mounting through-hole is inserted, is coupled to the light valve element. In addition, the holding member includes mounting portions protruding to the upper surface portion side and the lower surface portion side of the prism, and is fixed to the upper surface portion and the lower surface portion of the prism by the mounting portion . Further, the holding member has an opening at both ends in the direction along the plane of the dichroic film of the prism, and a ventilation path is formed in a space where the polarizing plate and the optical compensation element are provided.
Specifically, the present invention is a light valve fixing structure in a projection-type image display device, an optical unit, and a projection-type image display device having the above-described configuration as a basic configuration requirement.

本発明によれば、投射型映像表示装置技術において、部品点数を低減して低コスト化を図ることができるとともに、使用環境温度変化や衝撃などに対しても、コンバージェンス調整後のライトバルブの位置ずれを抑えることができ、表示画像の所定の画質を確保することができる。   According to the present invention, in the projection type image display device technology, the number of parts can be reduced and the cost can be reduced, and the position of the light valve after the convergence is adjusted even with respect to a change in operating environment temperature or an impact. The shift can be suppressed, and a predetermined image quality of the display image can be ensured.

以下、本発明の最良の実施形態につき、図面を用いて説明する。
図１〜図９は、本発明の一実施例の説明図である。なお、図１〜図９において、共通の構成・機能を有する構成要素には同じ符号を付すものとする。
図１は、本発明の実施例としての投射型映像表示装置の外観図で、（ａ）は正面側から見た外観を示し、（ｂ）は背面側からみた外観を示す。 Hereinafter, the best embodiment of the present invention will be described with reference to the drawings.
1-9 is explanatory drawing of one Example of this invention. In FIG. 1 to FIG. 9, the same reference numerals are assigned to components having common configurations and functions.
1A and 1B are external views of a projection type video display apparatus as an embodiment of the present invention, in which FIG. 1A shows an appearance viewed from the front side, and FIG. 1B shows an appearance viewed from the back side.

図１において、１は投射型映像表示装置、２は排気口、３は吸気口、４はパネル排気口、５は操作ボタン、１０は投射レンズユニットである。投射型映像表示装置１では、排気口２を、投射レンズユニット１０と同じ方向すなわち装置の正面側に設け、吸気口３を装置の背面側に設けてある。操作ボタン５やパネル吸気口４などは、投射型映像表示装置１の外表面部に配されている。かかる構成において、投射型映像表示装置１は、操作ボタン５により操作されて、動作する。動作時には、投射レンズユニット１０からスクリーンなど（図示せず）に表示用の映像光が拡大投射される。   In FIG. 1, 1 is a projection type image display device, 2 is an exhaust port, 3 is an intake port, 4 is a panel exhaust port, 5 is an operation button, and 10 is a projection lens unit. In the projection display apparatus 1, the exhaust port 2 is provided in the same direction as the projection lens unit 10, that is, on the front side of the device, and the intake port 3 is provided on the back side of the device. The operation buttons 5, the panel air inlet 4, and the like are arranged on the outer surface portion of the projection display apparatus 1. In such a configuration, the projection display apparatus 1 is operated by operating the operation buttons 5. At the time of operation, display image light is enlarged and projected from the projection lens unit 10 onto a screen or the like (not shown).

図２は、図１に示した投射型映像表示装置１の内部構成を示す図である。
図２において、３００は、液晶パネルなどのライトバルブを備え該ライトバルブに所定状態の光を照射し、該照射した光を、映像信号に対応して変調し光学像を形成する光学エンジン、１００は、光学エンジン３００内にあってライトバルブに所定状態の光を照射する照明手段、２００は排気用ダクト、３１０は、色合成用のクロスプリズムの周囲にライトバルブなどが装着されたプリズムユニットである。光学エンジン３００では、照明手段１００からの光を色分離手段（分光手段）（図示なし）で赤、緑、青の各色光に分離し、該色分離した各色光を、光路を形成する導光手段(図示せず)により、ライトバルブ（図示なし）側に導いて、該ライトバルブにおいて光強度変調を行い、各色光の光学像を形成する。光学像を形成した該色光をさらに、プリズムユニット３１０内のクロスプリズム（プリズム）に入射させ、該クロスプリズム内で色合成し、該色合成した光（白色光の光学像光）を投射レンズユニット１０からスクリーン（図示せず）などに拡大投射し、映像として表示する。光学エンジン３００内に設けられたプリズムユニット３１０は、その３つの側面部のそれぞれに、赤、緑、青の各色光に対応した各ライトバルブが装着されている。投射レンズユニット１０は、該プリズムユニット３１０の後段に取付けられる。本実施例では、ライトバルブとして液晶パネルを用いる。 FIG. 2 is a diagram showing an internal configuration of the projection display apparatus 1 shown in FIG.
In FIG. 2, an optical engine 300 includes a light valve such as a liquid crystal panel, irradiates the light valve with light in a predetermined state, and modulates the irradiated light according to a video signal to form an optical image. Is an illumination means for irradiating the light valve with light in a predetermined state in the optical engine 300, 200 is an exhaust duct, and 310 is a prism unit in which a light valve or the like is mounted around a color combining cross prism. is there. In the optical engine 300, light from the illumination unit 100 is separated into red, green, and blue color light by a color separation unit (spectral unit) (not shown), and the color separated color light is guided to form an optical path. By means (not shown), the light is guided to a light valve (not shown) side, light intensity modulation is performed in the light valve, and an optical image of each color light is formed. The color light that forms the optical image is further incident on a cross prism (prism) in the prism unit 310, and color synthesis is performed in the cross prism, and the color synthesized light (optical image light of white light) is projected to the projection lens unit. 10 is enlarged and projected onto a screen (not shown) or the like and displayed as an image. The prism unit 310 provided in the optical engine 300 is provided with light valves corresponding to red, green, and blue light on each of its three side surfaces. The projection lens unit 10 is attached to the rear stage of the prism unit 310. In this embodiment, a liquid crystal panel is used as the light valve.

図３は、上記図２の投射型映像表示装置１における光学ユニットの外観図である。
光学ユニットは、照明手段１００や色分離手段（図示せず）や導光手段（図示せず）やプリズムユニット３１０を備えて成る光学エンジン３００と、投射レンズユニット１０などから構成される。プリズムユニット３１０は、ライトバルブとしての液晶パネル（図示せず）、色合成用のクロスプリズム（図示せず）を備えて構成される。 FIG. 3 is an external view of the optical unit in the projection display apparatus 1 of FIG.
The optical unit includes an optical engine 300 including an illumination unit 100, a color separation unit (not shown), a light guide unit (not shown), and a prism unit 310, the projection lens unit 10, and the like. The prism unit 310 includes a liquid crystal panel (not shown) as a light valve and a color combining cross prism (not shown).

図４は、図３のプリズムユニット３１０の内部構成を示す図である。
図４において、３２０ａは、ライトバルブとしての液晶パネルＡ（赤色光用液晶パネルとする）、３２０ｂ及び３２０ｃは、液晶パネルＡ３２０ａと一体状構成とされ該液晶パネルＡ３２０ａの周囲において該液晶パネルＡ３２０ａを保持する保持部、３２０ｄは、保持部３２０ｃに設けられた取付け用貫通孔、３２０ｅは、液晶パネルＡ３２０ａの配線用フレキシブル基板、３２０は、これら液晶パネルＡ３２０ａ、保持部３２０ｂ、３２０ｃ、配線用フレキシブル基板３２０ｅを備えて成るライトバルブ部材としての液晶パネル体Ａ、３３０は、上記保持部３２０ｂ、３２０ｃと結合されクロスプリズム側に固定される保持部材、３５０ａは、ライトバルブとしての液晶パネルＢ（緑色光用とする）、３５０ｂ及び３５０ｃは、液晶パネルＢ３５０ａと一体状の構成とされ該液晶パネルＢ３５０ａの周囲において該液晶パネルＢ３５０ａを保持する保持部、３５０ｄは、保持部３５０ｃに設けられた取付け用貫通孔、３５０ｅは、液晶パネルＢ３５０ａの配線用フレキシブル基板、３５０は、これら液晶パネルＢ３５０ａ、保持部３５０ｂ、３５０ｃ、配線用フレキシブル基板３５０ｅを備えて成るライトバルブ部材としての液晶パネル体Ｂ、３４０は、上記保持部３５０ｂ、３５０ｃと結合されクロスプリズム側に固定される保持部材、３７０ａは、ライトバルブとしての液晶パネルＣ（青色光用とする）、３７０ｂは、液晶パネルＣ３７０ａと一体状の構成とされ該液晶パネルＣ３７０ａの周囲において該液晶パネルＣ３７０ａを保持する保持部、３７０ｅは、液晶パネルＣ３７０ａの配線用フレキシブル基板、３７０は、これら液晶パネルＣ３７０ａ、保持部３７０ｂ、配線用フレキシブル基板３７０ｅなどを備えて成るライトバルブ部材としての液晶パネル体Ｃ、３６０は、上記保持部３７０ｂと結合されクロスプリズム側に固定される保持部材、３８０は、投射レンズユニット１０側に取付けられクロスプリズムを保持するプリズムホルダ、８００は、液晶パネルＡ３２０ａ、液晶パネルＢ３５０ａ及び液晶パネルＣ３７０ａを映像表示信号に基づき駆動する駆動回路である。上記各液晶パネル体の各保持部には複数の取付け用貫通孔が設けられる。
上記保持部材３３０、３４０、３６０はそれぞれ１個の独立した金属材で構成され、例えば板状の金属材に折り曲げ加工やプレス加工などが施されることにより構成され、各液晶パネル体の各保持部に設けられた複数の取付け用貫通孔に対応した位置に突起部を備え、該突起部がそれぞれ、対応する各液晶パネル体の各保持部の取付け用貫通孔内に挿入された状態で、該取付け用貫通孔内の接着剤により、各保持部のそれぞれと結合される。 FIG. 4 is a diagram showing an internal configuration of the prism unit 310 of FIG.
In FIG. 4, reference numeral 320a denotes a liquid crystal panel A as a light valve (a liquid crystal panel for red light), and 320b and 320c are integrated with the liquid crystal panel A 320a, and the liquid crystal panel A 320a is arranged around the liquid crystal panel A 320a. The holding part to be held, 320d is a mounting through-hole provided in the holding part 320c, 320e is a flexible substrate for wiring of the liquid crystal panel A 320a, 320 is the liquid crystal panel A 320a, holding parts 320b and 320c, and a flexible substrate for wiring The liquid crystal panel bodies A and 330 serving as light valve members having 320e are connected to the holding portions 320b and 320c and fixed to the cross prism side, and 350a is a liquid crystal panel B serving as a light valve (green light 350b and 350c are liquid crystal panels. B350a is a unitary structure that holds the liquid crystal panel B350a around the liquid crystal panel B350a, 350d is a mounting through hole provided in the holding part 350c, and 350e is a flexible wiring for the liquid crystal panel B350a. The liquid crystal panel body B, 340 as a light valve member comprising the liquid crystal panel B 350a, the holding portions 350b, 350c, and the wiring flexible substrate 350e is coupled to the holding portions 350b, 350c and the cross prism side. The holding member 370a is fixed to the liquid crystal panel C as a light valve (for blue light), 370b is integrated with the liquid crystal panel C370a, and the liquid crystal panel C370a is disposed around the liquid crystal panel C370a. The holding part to hold, 370e is a liquid crystal panel A flexible substrate for wiring 370a, 370 includes a liquid crystal panel C370a, a holding portion 370b, a flexible substrate for wiring 370e, and the like, and a liquid crystal panel body C, 360 as a light valve member is coupled to the holding portion 370b and crossed. A holding member fixed to the prism side, 380 is a prism holder attached to the projection lens unit 10 side and holds a cross prism, and 800 drives the liquid crystal panel A 320a, the liquid crystal panel B 350a, and the liquid crystal panel C 370a based on the video display signal. It is a drive circuit. Each holding part of each liquid crystal panel body is provided with a plurality of mounting through holes.
Each of the holding members 330, 340, and 360 is formed of one independent metal material, and is formed by, for example, bending or pressing a plate-shaped metal material, and holding each liquid crystal panel body. Protruding portions are provided at positions corresponding to the plurality of mounting through holes provided in the portions, and the protruding portions are inserted into the mounting through holes of the respective holding portions of the corresponding liquid crystal panel bodies, Each of the holding portions is coupled with the adhesive in the mounting through-hole.

また、液晶パネルＡ３２０ａ、液晶パネルＢ３５０ａ及び液晶パネルＣ３７０ａはそれぞれ、フレキシブル配線基板３２０ｅ、３５０ｅ、３７０ｅを介して駆動回路８００に接続され、該駆動回路８００によって映像表示信号に応じて駆動されるようになっている。液晶パネルＡ３２０ａには、色分離された赤色光の偏光光（Ｓ偏光光またはＰ偏光光）が入射され、液晶パネルＢ３５０ａには、色分離された緑色光の偏光光（Ｓ偏光光またはＰ偏光光）が入射され、液晶パネルＣ３７０ａには、色分離された青色光の偏光光（Ｓ偏光光またはＰ偏光光）が入射（照射）される。各液晶パネルＡ３２０ａ、液晶パネルＢ３５０ａ、液晶パネルＣ３７０ａでは、各入射光（照射光）が、映像表示信号に応じて変調され、各色光の光学像を形成する。光学像を形成した各色光はクロスプリズムに入射され、該クロスプリズムのダイクロイック膜で反射されまたは該膜を透過して色合成されて映像光となる。   Further, the liquid crystal panel A 320a, the liquid crystal panel B 350a, and the liquid crystal panel C 370a are connected to the drive circuit 800 via the flexible wiring boards 320e, 350e, and 370e, respectively, and are driven by the drive circuit 800 according to the video display signal. It has become. Color-separated red polarized light (S-polarized light or P-polarized light) is incident on the liquid crystal panel A320a, and color-separated green light polarized light (S-polarized light or P-polarized light) is incident on the liquid crystal panel B350a. Light) is incident, and the color-separated blue polarized light (S-polarized light or P-polarized light) is incident (irradiated) on the liquid crystal panel C370a. In each liquid crystal panel A 320a, liquid crystal panel B 350a, and liquid crystal panel C 370a, each incident light (irradiation light) is modulated according to a video display signal to form an optical image of each color light. Each color light that forms an optical image is incident on a cross prism, reflected by a dichroic film of the cross prism, or transmitted through the film to be color-combined to become image light.

図５及び図６は、図１の投射型映像表示装置１のプリズムユニット３１０内における各液晶パネル体３２０、３５０、３７０の実装構成の説明図で、図５は、各液晶パネル体３２０、３５０、３７０がそれぞれ、クロスプリズムの周囲に実装されているときの状態を示す図、図６は、赤色光用の液晶パネル体Ａ３２０の実装構成の説明図である。
図５において、３３０ａは、保持部材３３０上において、保持部３２０ｃ上の複数の各取付け用貫通孔３２０ｄに対応する位置に設けられた突起部、３４０ａは、保持部材３４０上において、保持部３５０ｃ上の複数の各取付け用貫通孔３５０ｄに対応する位置に設けられた突起部、６００は、色合成手段としてのクロスプリズム、６１０は該クロスプリズム６００の上面部、６００ａ、６００ｃは、該クロスプリズム６００のダイクロイック膜から形成されたクロスダイクロイックミラー面である。液晶パネル体Ａ３２０は、その保持部３２０ｂ、３２０ｃ及び保持部材３３０を介してクロスプリズム６００の周囲の１つの面に固定され、液晶パネル体３５０は、その保持部３５０ｂ、３５０ｃ及び保持部材３４０を介してクロスプリズム６００の周囲の１つの面に固定され、同様に、液晶パネル体Ｃ３７０は、その保持部及び保持部材３６０を介してクロスプリズム６００の周囲の１つの面に固定されている。 FIGS. 5 and 6 are explanatory views of the mounting configuration of the liquid crystal panel bodies 320, 350, and 370 in the prism unit 310 of the projection display apparatus 1 of FIG. 1, and FIG. FIG. 6 is a diagram showing a state when 370 is mounted around the cross prism, and FIG. 6 is an explanatory diagram of a mounting configuration of the liquid crystal panel body A320 for red light.
In FIG. 5, 330 a is a protrusion provided on the holding member 330 at a position corresponding to each of the plurality of mounting through holes 320 d on the holding portion 320 c, and 340 a is on the holding member 350 and on the holding portion 350 c. The projections provided at positions corresponding to the plurality of mounting through holes 350d, 600 is a cross prism as color synthesizing means, 610 is the upper surface of the cross prism 600, and 600a and 600c are the cross prism 600. This is a cross dichroic mirror surface formed from the above dichroic film. The liquid crystal panel body A320 is fixed to one surface around the cross prism 600 via the holding portions 320b and 320c and the holding member 330, and the liquid crystal panel body 350 is interposed via the holding portions 350b and 350c and the holding member 340. Similarly, the liquid crystal panel body C370 is fixed to one surface around the cross prism 600 via its holding portion and holding member 360.

液晶パネルＡ３２０ａは、保持部３２０ｂ、３２０ｃに対し一体状の構成で組み込まれ、該液晶パネルＡ３２０ａと該保持部３２０ｂ、３２０ｃとは１個の単体部品としての液晶パネル体Ａ３２０を構成している。同様に、液晶パネルＢ３５０ａは、その保持部３５０ｂ、３５０ｃに対し一体状の構成で組み込まれ、該液晶パネルＢ３５０ａと該保持部３５０ｂ、３５０ｃとは１個の単体部品としての液晶パネル体Ｂ３５０を構成し、液晶パネルＣ３７０ａも、その保持部に対し一体状の構成で組み込まれ、該液晶パネルＣ３７０ａと該保持部は１個の単体部品としての液晶パネル体Ｃ３７０を構成している。   The liquid crystal panel A 320a is incorporated into the holding portions 320b and 320c in an integrated configuration, and the liquid crystal panel A 320a and the holding portions 320b and 320c constitute a liquid crystal panel body A320 as a single component. Similarly, the liquid crystal panel B350a is incorporated into the holding portions 350b and 350c in an integral configuration, and the liquid crystal panel B350a and the holding portions 350b and 350c constitute a liquid crystal panel body B350 as a single component. The liquid crystal panel C370a is also incorporated in the holding portion in an integral configuration, and the liquid crystal panel C370a and the holding portion constitute a liquid crystal panel body C370 as a single component.

液晶パネルＡ３２０ａが一体状に組み込まれた保持部３２０ｂ、３２０ｃは、保持部材３３０に対し、該保持部３２０ｃ上の複数の各取付け用貫通孔３２０ｄに該保持部材３３０上の各突起部３３０ａが挿入され、各取付け用貫通孔３２０ｄ内に充填された接着剤で、該突起部３３０ａ及びその根元の平面部と該取付け用貫通孔３２０ｄの内面部との間が接着されることで結合される。保持部材３３０は、クロスプリズム６００に対し、接着剤により直接的に固定される。また、液晶パネルＢ３５０ａが一体状に組み込まれた保持部３５０ｂ、３５０ｃは、保持部材３４０に対し、該保持部３５０ｃ上の複数の各取付け用貫通孔３５０ｄに該保持部材３４０上の各突起部３４０ａが挿入され、各取付け用貫通孔３５０ｄ内に充填された接着剤で、該突起部３４０ａ及びその根元の平面部と該取付け用貫通孔３５０ｄの内面部との間が接着されることで結合される。保持部材３４０は、クロスプリズム６００に対し、接着剤により直接的に固定される。同様に、液晶パネルＣ３７０ａが一体状に組み込まれた保持部は、保持部材３６０に対し、該保持部上の複数の各取付け用貫通孔に該保持部材３６０上の各突起部が挿入され、各取付け用貫通孔内に充填された接着剤で、該突起部及びその根元の平面部と該取付け用貫通孔の内面部との間が接着されることで結合される。保持部材３６０は、クロスプリズム６００に対し、接着剤により直接的に固定される。   In the holding portions 320b and 320c in which the liquid crystal panel A 320a is integrated, the protrusions 330a on the holding member 330 are inserted into the mounting through holes 320d on the holding portion 320c. Then, with the adhesive filled in each mounting through-hole 320d, the projection 330a and the flat portion at the base thereof are bonded to the inner surface of the mounting through-hole 320d to be coupled. The holding member 330 is directly fixed to the cross prism 600 with an adhesive. In addition, the holding portions 350b and 350c in which the liquid crystal panel B350a is integrated are provided in the plurality of mounting through holes 350d on the holding portion 350c with respect to the holding member 340, and the protrusions 340a on the holding member 340. Is inserted and bonded between the projection 340a and the flat portion at the base thereof and the inner surface of the mounting through hole 350d with an adhesive filled in the mounting through holes 350d. The The holding member 340 is directly fixed to the cross prism 600 by an adhesive. Similarly, in the holding portion in which the liquid crystal panel C 370a is integrated, the protrusions on the holding member 360 are inserted into the plurality of mounting through holes on the holding portion with respect to the holding member 360. With the adhesive filled in the mounting through-hole, the projection and the flat portion at the base thereof and the inner surface of the mounting through-hole are bonded to bond. The holding member 360 is directly fixed to the cross prism 600 by an adhesive.

図６において、（ａ）は、赤色光用の液晶パネル体Ａ３２０の実装構成を示す図、（ｂ）は、非実装の状態にある場合を示す図である。
図６において、３３０ｂは、保持部材３３０上に構成された開口部、３３０ｃは、保持部材３３０内に構成された溝部、３３０ｄは、保持部材３３０上に突出状に構成されたクロスプリズム６００への取付け部、４１０は、所定の偏光方向の光を通すための偏光板または光の位相差を補償するための光学補償素子、５００は、取付け用貫通孔３２０ｄ内に充填され保持部３２０ｃと保持部材３３０とを結合する接着剤、６２０は、クロスプリズム６００の下面部である。他の符号は、上記図４、図５の場合と同じである。突出状の取付け部３３０ｄは、接着剤により、クロスプリズム６００の上面部６１０及び下面部６２０に固定される。偏光板または光学補償素子４１０は、溝部３３０ｃ内に挿入され所定位置に固定される。 6A is a diagram illustrating a mounting configuration of the red light liquid crystal panel A320, and FIG. 6B is a diagram illustrating a case where the liquid crystal panel body A320 is not mounted.
In FIG. 6, 330 b is an opening formed on the holding member 330, 330 c is a groove formed in the holding member 330, and 330 d is a protrusion to the cross prism 600 formed on the holding member 330. A mounting portion 410 is a polarizing plate for allowing light of a predetermined polarization direction to pass through or an optical compensation element for compensating for a phase difference of light, and 500 is filled in the mounting through-hole 320d, and the holding portion 320c and the holding member Reference numeral 620 denotes an adhesive that bonds 330 to the lower surface of the cross prism 600. Other reference numerals are the same as those in FIGS. The protruding attachment portion 330d is fixed to the upper surface portion 610 and the lower surface portion 620 of the cross prism 600 by an adhesive. The polarizing plate or the optical compensation element 410 is inserted into the groove 330c and fixed at a predetermined position.

図７は、上記図６（ａ）に示したプリズムユニット３１０の断面図である。
図７において、２１０は光軸、２２０は入射光（赤色光）、７００は、保持部材３３０上に構成された取付け部３３０ｄを、クロスプリズム６００の上面部６１０及び下面部６２０に固定するための接着剤である。他の符号は上記図６の場合と同様である。保持部３２０ｂ、３２０ｃに対し液晶パネルＡ３２０ａが一体状構成で組み込まれて成る液晶パネル体Ａ３２０を、保持部材３３０を介してクロスプリズム６００側に固定するとき、（１）先ず、保持部３２０ｃの各取付け用貫通孔３２０ｄ中に保持部材３３０上の突起部３３０ａを挿入し、該取付け用貫通孔３２０ｄ内の接着剤５００で両者間を接着することで、液晶パネル体Ａ３２０の保持部３２０ｂ、３２０ｃを保持部材３３０側に結合し、その後、該保持部材３３０を、取付け部３３０ｄによりクロスプリズム６００側に接着剤７００で固定するようにしてもよいし、または、（２）先に、保持部材３３０を、取付け部３３０ｄにより、クロスプリズム６００側に接着剤７００で固定し、その後、保持部３２０ｃの取付け用貫通孔３２０ｄに該保持部材３３０上の突起部３３０ａを挿入し、該取付け用貫通孔３２０ｄ内の接着剤５００で両者間を接着することで、液晶パネル体Ａ３２０の保持部３２０ｂ、３２０ｃを該保持部材３３０に対して結合するようにしてもよい。他の液晶パネル体（液晶パネル体Ｂ３５０、液晶パネル体Ｃ３７０）についても同様である。上記（１）、（２）の場合とも、クロスプリズム６００のクロスダイクロイックミラー面に対して液晶パネルＡ３２０ａが所定の位置関係となるようにする調整例えばコンバージェンス調整を行うものとする。他の液晶パネル（液晶パネルＢ３５０ａ、液晶パネルＣ３７０ａ）の場合も同様である。 FIG. 7 is a cross-sectional view of the prism unit 310 shown in FIG.
In FIG. 7, reference numeral 210 denotes an optical axis, 220 denotes incident light (red light), and 700 denotes a mounting portion 330 d configured on the holding member 330 for fixing the upper surface portion 610 and the lower surface portion 620 of the cross prism 600. It is an adhesive. Other reference numerals are the same as those in FIG. When fixing the liquid crystal panel A320 in which the liquid crystal panel A320a is integrated with the holding parts 320b and 320c to the cross prism 600 side via the holding member 330, (1) First, each of the holding parts 320c The protrusions 330a on the holding member 330 are inserted into the mounting through-holes 320d, and the two are bonded together with the adhesive 500 in the mounting through-holes 320d, whereby the holding parts 320b and 320c of the liquid crystal panel A320 are attached. The holding member 330 may be coupled to the holding member 330 side, and then the holding member 330 may be fixed to the cross prism 600 side with the adhesive 700 by the attaching portion 330d. Alternatively, (2) the holding member 330 may be fixed first. The fixing portion 330d is fixed to the cross prism 600 side with the adhesive 700, and then the attaching through hole 3 of the holding portion 320c. The protrusions 330a on the holding member 330 are inserted into 0d, and the two are adhered to each other with the adhesive 500 in the mounting through hole 320d, so that the holding parts 320b and 320c of the liquid crystal panel A320 are attached to the holding member 330. May be combined. The same applies to the other liquid crystal panel bodies (liquid crystal panel body B350, liquid crystal panel body C370). In both cases (1) and (2), adjustments such as convergence adjustment are performed so that the liquid crystal panel A 320a is in a predetermined positional relationship with respect to the cross dichroic mirror surface of the cross prism 600. The same applies to other liquid crystal panels (liquid crystal panel B350a, liquid crystal panel C370a).

図７の構成において、赤色光の入射光２２０は、光軸２１０に沿って液晶パネルＡ３２０ａに照射され、該液晶パネルＡ３２０ａ内で映像表示信号に基づき変調されて光学像を形成する。該変調されるとき、偏光方向を回転され、例えばＰ偏光光はＳ偏光光となり、Ｓ偏光光はＰ偏光光となる。変調された光（赤色の偏光光）は、液晶パネルＡ３２０ａから出射されて、開口部３３０ｂを通って保持部材３３０内に入り、該保持部材３３０内の溝部３３０ｃに配された偏光板または光学補償素子４１０で所定の偏光方向の光または位相差を補償された光とされ、クロスプリズム６００に入射する。クロスプリズム６００内では、クロスダイクロイックミラー面で反射されまたは該面を透過して色合成され、白色光として投射レンズユニット１０（図３、図４）側に出射される。   In the configuration of FIG. 7, incident light 220 of red light is applied to the liquid crystal panel A 320a along the optical axis 210, and is modulated based on the video display signal in the liquid crystal panel A 320a to form an optical image. When the modulation is performed, the polarization direction is rotated, for example, P-polarized light becomes S-polarized light, and S-polarized light becomes P-polarized light. The modulated light (red polarized light) is emitted from the liquid crystal panel A 320 a, enters the holding member 330 through the opening 330 b, and is a polarizing plate or optical compensation disposed in the groove 330 c in the holding member 330. Light having a predetermined polarization direction or light having a phase difference compensated by the element 410 is incident on the cross prism 600. In the cross prism 600, the light is reflected by the cross dichroic mirror surface or transmitted through the surface to be color-combined and emitted as white light to the projection lens unit 10 (FIGS. 3 and 4).

図８は、液晶パネル体内の保持部を保持部材と結合する構成の説明図である。図８は、液晶パネル体Ａ３２０の保持部３２０ｃの取付け用貫通孔３２０ｄの部分と、保持部材３３０上に設けた突起部３３０ａの部分との拡大図で、（ａ）は、取付け用貫通孔３２０ｄ内に突起部３３０ａが挿入された状態、（ｂ）は、（ａ）の状態の取付け用貫通孔３２０ｄ内に接着剤５００を充填したときの状態を示す。接着剤５００により、該取付け用貫通孔３２０ｄの内面部３２０ｄｉと、該突起部３３０ａの外周部３３０ａ１及びその根元の平面部３３０ａ２との間が接着力で結合される。他の液晶パネル体（液晶パネル体Ｂ３５０、液晶パネル体Ｃ３７０）の保持部と保持部材の結合構成についても同様である。 FIG. 8 is an explanatory diagram of a configuration in which the holding portion in the liquid crystal panel is coupled to the holding member. FIG. 8 is an enlarged view of a portion of the attachment through hole 320d of the holding portion 320c of the liquid crystal panel body A320 and a portion of the protrusion 330a provided on the holding member 330. FIG. 8A is an attachment through hole 320d. A state in which the protruding portion 330a is inserted into the inside, (b) shows a state when the adhesive 500 is filled in the mounting through hole 320d in the state (a). The adhesive 500, between the inner surface portion 320di of mounting through hole 320d, an outer peripheral portion 330a 1 and the plane portion 330a 2 of the base of the protrusion portion 330a is joined by adhesion. The same applies to the coupling configuration of the holding portions and the holding members of the other liquid crystal panel bodies (liquid crystal panel body B350, liquid crystal panel body C370).

図９は、本発明で用いる保持部材の構成図である。図９は、液晶パネル体Ａ３２０の保持部３２０ｂ、３２０ｃに結合される保持部材３３０の場合を示す。本保持部材３３０は、例えば板状の金属材に折り曲げ加工やプレス加工を施して構成する。
図９において、３３０ｅは、突起部３３０ａをプレス加工で切り起こした跡の空間、１０００は、液晶パネル体Ａ３２０と一体状のライトバルブホルダ３２０ａ、３２０ｂが結合される側の面、２０００は、クロスプリズム６００に接する側の面、３０００は、内部に偏光板または光学補償素子４１０が配され、図の上下方向すなわちクロスプリズム６００の光入射側平面に沿う方向の両端部に開口部を有し、該クロスプリズム６００と液晶パネル体Ａ３２０と保持部材３３０とで囲まれた空間部である。該空間部は、通風路を形成する。該通風路内では、偏光板または光学補償素子４１０と液晶パネルとの間や、偏光板または光学補償素子４１０とクロスプリズム６００との間に冷却用の空気を流すことができ、これら各部品の冷却が可能である。空間部３０００内で偏光板または光学補償素子４１０を保持する溝部３３０ｃは、その両側の壁を形成する突出部３３０ｃ１、３３０ｃ２もプレス加工によって構成される。他の中間ホルダ（中間ホルダＢ３４０、中間ホルダＣ３６０）についても同様である。
なお、該各中間ホルダ３３０、３４０、３６０は、金属材に限らず、他の材料例えば熱可塑性高分子材料などを用いて構成してもよい。 FIG. 9 is a configuration diagram of a holding member used in the present invention. FIG. 9 shows the case of the holding member 330 coupled to the holding portions 320b and 320c of the liquid crystal panel body A320. The main holding member 330 is configured by bending or pressing a plate-shaped metal material, for example.
In FIG. 9, 330 e is a space where the protruding portion 330 a is cut and raised by pressing, 1000 is a surface on the side where the light valve holders 320 a and 320 b integrated with the liquid crystal panel body A 320 are combined, and 2000 is a cross A surface 3000 in contact with the prism 600 has a polarizing plate or an optical compensation element 410 disposed therein, and has openings at both ends in the vertical direction of the drawing, that is, along the light incident side plane of the cross prism 600, This is a space surrounded by the cross prism 600, the liquid crystal panel body A 320, and the holding member 330. The space portion forms a ventilation path. In the ventilation path, cooling air can flow between the polarizing plate or optical compensation element 410 and the liquid crystal panel, or between the polarizing plate or optical compensation element 410 and the cross prism 600. Cooling is possible. In the groove part 330c that holds the polarizing plate or the optical compensation element 410 in the space part 3000, the projecting parts 330c 1 and 330c 2 that form the walls on both sides thereof are also formed by pressing. The same applies to the other intermediate holders (intermediate holder B340, intermediate holder C360).
The intermediate holders 330, 340, and 360 are not limited to metal materials, and may be configured using other materials such as thermoplastic polymer materials.

上記本発明の実施例によれば、投射型映像表示装置のプリズムユニット３１０を、各液晶パネル体の保持部と各保持部材３３０、３４０、３６０とを、所定の位置関係を確保した状態で接着剤５００により固定し、さらに、該各保持部材３３０、３４０、３６０を、クロスプリズム６００に対してコンバージェンス調整し、接着剤７００で該クロスプリズム６００に直接的に固定する構造としているため、該プリズムユニット３１０を、ネジや、クロスプリズム６００側の取付け用部材などを不要とするなど部品点数を減らした低コストで簡易な構成とすることができ、かつ、各液晶パネルをそれぞれ、クロスプリズム６００側に精度良く取付けることができる。また、使用環境の温度変化や衝撃等に対しても、コンバージェンス調整後の、該クロスプリズム６００に対する液晶パネルの位置ずれの増大を抑えることが可能となる。また、各保持部材３３０、３４０、３６０には通風路を形成してあるため、偏光板や光学補償素子や液晶パネルやクロスプリズム６００の冷却が可能となる。また、該各保持部材３３０、３４０、３６０を、金属材で構成した場合には、例えば、液晶パネル側からの熱を効率的に、該各保持部材３３０、３４０、３６０の表面から逃がすことができ、液晶パネルの過熱や熱による特性劣化などを防止することができる。   According to the embodiment of the present invention, the prism unit 310 of the projection display apparatus is bonded to the holding portions of the liquid crystal panel bodies and the holding members 330, 340, 360 in a state in which a predetermined positional relationship is secured. The prism is fixed by the agent 500, and the holding members 330, 340, and 360 are adjusted for convergence with respect to the cross prism 600, and directly fixed to the cross prism 600 with the adhesive 700. The unit 310 can have a low-cost and simple configuration with a reduced number of parts, such as eliminating the need for screws and mounting members on the cross prism 600 side, and each liquid crystal panel can be arranged on the cross prism 600 side. Can be mounted with high accuracy. In addition, it is possible to suppress an increase in the positional deviation of the liquid crystal panel with respect to the cross prism 600 after the convergence adjustment, even with respect to temperature changes or impacts in the usage environment. In addition, since the holding members 330, 340, and 360 are formed with ventilation paths, the polarizing plate, the optical compensation element, the liquid crystal panel, and the cross prism 600 can be cooled. Further, when each holding member 330, 340, 360 is made of a metal material, for example, heat from the liquid crystal panel side can be efficiently released from the surface of each holding member 330, 340, 360. It is possible to prevent overheating of the liquid crystal panel and deterioration of characteristics due to heat.

なお、上記実施例では、色合成手段としては、クロスプリズム６００を用いるとしたが、他の構成のプリズム、例えば三角プリズム（全反射プリズム）などを用いてもよい。また、上記実施例では、液晶パネルを、赤、緑、青の各色光用として計３個用いるとしたが、本発明はこれにも限定されない。また、ライトバルブも、液晶パネルに限定されず、他の素子を用いてもよい。さらには、ライトバルブとして透過型液晶パネルを用いたが、ライトバルブとしては、反射型液晶パネルを用いてもよいし、液晶パネル以外の素子を用いてもよい。反射型液晶パネルを用いる場合は、クロスプリズム６００に替えて、偏光子と検光子の機能を有するＰＢＳプリズムを用いることが必要で、該ＰＢＳプリズムに反射型液晶パネルを装着することになる。   In the above-described embodiment, the cross prism 600 is used as the color synthesizing unit. However, a prism having another configuration, such as a triangular prism (total reflection prism), may be used. In the above embodiment, a total of three liquid crystal panels are used for red, green, and blue color lights, but the present invention is not limited to this. Further, the light valve is not limited to the liquid crystal panel, and other elements may be used. Furthermore, although a transmissive liquid crystal panel is used as the light valve, a reflective liquid crystal panel may be used as the light valve, or an element other than the liquid crystal panel may be used. When a reflective liquid crystal panel is used, it is necessary to use a PBS prism having functions of a polarizer and an analyzer instead of the cross prism 600, and the reflective liquid crystal panel is attached to the PBS prism.

本発明の実施例としての投射型映像表示装置の外観図である。1 is an external view of a projection type video display device as an embodiment of the present invention. 図１の投射型映像表示装置の内部構成図である。It is an internal block diagram of the projection type video display apparatus of FIG. 図１の投射型映像表示装置における光学ユニットの外観図である。It is an external view of the optical unit in the projection type video display apparatus of FIG. 図１の投射型映像表示装置におけるプリズムユニットの内部構成図である。It is an internal block diagram of the prism unit in the projection type video display apparatus of FIG. 図１の投射型映像表示装置におけるプリズムユニット内の液晶パネル体の実装説明図である。FIG. 2 is a mounting explanatory view of a liquid crystal panel body in a prism unit in the projection display apparatus of FIG. 1. 図１の投射型映像表示装置におけるプリズムユニット内の液晶パネル体の実装説明図である。FIG. 2 is a mounting explanatory view of a liquid crystal panel body in a prism unit in the projection display apparatus of FIG. 1. 図６のプリズムユニットの断面図である。It is sectional drawing of the prism unit of FIG. 図６のプリズムユニット内における液晶パネル体の保持部と保持部材との結合構成の説明図である。It is explanatory drawing of the coupling | bonding structure of the holding | maintenance part and holding member of a liquid crystal panel body in the prism unit of FIG. 本発明における保持部材の構成図である。It is a block diagram of the holding member in this invention.

符号の説明Explanation of symbols

１…投射型映像表示装置、
２…排気口、
３…吸気口、
４…パネル排気口、
５…操作ボタン、
１０…投射レンズユニット、
１００…照明手段、
２００…排気用ダクト、
３００…光学エンジン、
３１０…プリズムユニット、
３２０、３５０、３７０…液晶パネル体、
３２０ａ、３５０ａ、３７０ａ…液晶パネル、
３２０ｂ、３２０ｃ、３５０ｂ、３５０ｃ、３７０ｃ…保持部、
３２０ｄ、３５０ｄ…取付け用貫通孔、
３２０ｅ、３５０ｅ、３７０ｅ…配線用フレキシブル基板、
３３０、３４０、３６０…保持部材、
３３０ａ、３４０ａ…突起部、
３８０…プリズムホルダ、
６００…クロスプリズム、
６００ａ、６００ｃ…クロスダイクロイックミラー面、
５００、７００…接着剤、
８００…駆動回路。
1 ... Projection type image display device,
2 ... exhaust port,
3 ... Inlet,
4 ... Panel exhaust port,
5. Operation buttons
10: Projection lens unit,
100: Illumination means,
200 ... exhaust duct,
300 ... Optical engine,
310 ... prism unit,
320, 350, 370 ... liquid crystal panel body,
320a, 350a, 370a ... liquid crystal panel,
320b, 320c, 350b, 350c, 370c ... holding unit,
320d, 350d ... through holes for mounting,
320e, 350e, 370e ... flexible substrate for wiring,
330, 340, 360 ... holding member,
330a, 340a ... projection,
380 ... Prism holder,
600 ... Cross prism,
600a, 600c: Cross dichroic mirror surface,
500, 700 ... adhesive,
800 ... Drive circuit.

Claims (8)

光源側からの光をライトバルブに照射し映像表示信号に応じた光学像を形成して拡大投射する投射型映像表示装置であって、
上記ライトバルブと、該ライトバルブの周囲において該ライトバルブを保持する保持部とを有し、該保持部に複数の取付け用貫通孔が設けられたライトバルブ部材と、
ダイクロイック膜を有し、上記ライトバルブ部材側から出射される変調された赤、緑、青の各色光を合成するプリズムと、
１個の独立した金属材で構成され、所定の偏光方向の光を通す偏光板または光の位相差を補償する光学補償素子のいずれか一方または両方を保持する部材であって、上記ライトバルブ部材の上記複数の取付け用貫通孔に挿入される複数の突起部と、上記プリズムの上面部側及び下面部側に突出した取付け部とを備え、該取付け部により上記プリズムの上面部及び下面部に取付けられる保持部材と、
上記プリズムで色合成された光を拡大投射する投射レンズユニットと、
上記ライトバルブ部材のライトバルブを駆動する駆動回路と、
を備え、
上記保持部材が上記取付け部により上記プリズムの上面部及び下面部に固定され、かつ、該保持部材に対し上記ライトバルブ部材が、該ライトバルブ部材上の上記取付け用貫通孔のそれぞれに該保持部材上の上記突起部がそれぞれ挿入された状態で結合される構成としたことを特徴とする投射型映像表示装置。 A projection-type image display device that irradiates light from a light source side to a light valve and forms an optical image according to an image display signal to project an enlarged image,
And said light valve, and a holding portion for holding the light valve at the periphery of the light valve, a light valve member having a plurality of mounting holes in the holding portion is provided,
A prism that has a dichroic film and synthesizes modulated red, green, and blue light emitted from the light valve member side;
A member that holds either one or both of a polarizing plate that passes light in a predetermined polarization direction and an optical compensation element that compensates for the phase difference of light, which is made of a single independent metal material, the light valve member a plurality of protrusions that are inserted into the plurality of mounting holes of the, and a mounting portion projecting on the upper surface side and lower surface side of the prism, the top portion and the bottom surface portion of the prism by attachment portion A retaining member to be attached;
A projection lens unit for enlarging and projecting the color synthesized by the prism;
A drive circuit for driving the light valve of the light valve member;
With
The holding member is fixed to the upper surface portion and the lower surface portion of the prism by the mounting portion, and the light valve member is attached to the holding member in each of the mounting through holes on the light valve member. A projection-type image display apparatus, characterized in that the above-described protrusions are combined in a state of being inserted . 上記保持部材は、板状の金属材を折り曲げ加工を含む加工処理した部材である請求項１に記載の投射型映像表示装置。   The projection type image display device according to claim 1, wherein the holding member is a member obtained by processing a plate-shaped metal material including a bending process. 上記保持部材は、上記偏光板または上記光学補償素子のいずれか一方または両方を保持する部分が溝状とされ、該溝状部分に上記偏光板または上記光学補償素子のいずれか一方または両方が挿入された構成である請求項１または請求項２に記載の投射型映像表示装置。 In the holding member, a part holding either one or both of the polarizing plate and the optical compensation element is formed in a groove shape, and either one or both of the polarizing plate or the optical compensation element is inserted into the groove-like part. projection display device according to claim 1 or claim 2 which is a configuration. 上記保持部材は、上記取付け部が接着剤により上記プリズムの上面部及び下面部に結合される構成である請求項１から３のいずれかに記載の投射型映像表示装置。 The holding member is projected morphism type video display according to claim 1 of the mounting portion is configured to be coupled to the upper surface portion and lower surface portion of the prism by an adhesive. 上記保持部材は、上記プリズムの光入射側平面に沿う方向の両端部に開口を有し、該プリズムと上記ライトバルブ部材と該保持部材とで囲まれた空間部内に、上記偏光板または上記光学補償素子が設けられかつ通風路が形成された構成である請求項１から４のいずれかに記載の投射型映像表示装置。 The holding member has openings at both ends in a direction along the light incident side plane of the prism, and the polarizing plate or the optical member is disposed in a space surrounded by the prism, the light valve member, and the holding member. projection morphism display apparatus according to any one of the compensation element is configured to provided and air passage is formed claims 1-4. 上記ライトバルブは、液晶パネルである請求項１から５のいずれかに記載の投射型映像表示装置。 It said light valve projection morphism type video display according to any one of claims 1-5 is a liquid crystal panel. 光源側からの光をライトバルブに照射し映像表示信号に応じた光学像を形成して拡大投射する投射型映像表示装置の光学ユニットであって、
上記ライトバルブと、該ライトバルブの周囲において該ライトバルブを保持する保持部とを有し、該保持部に複数の取付け用貫通孔が設けられたライトバルブ部材と、
ダイクロイック膜を有し、上記ライトバルブ部材側から出射される変調された赤、緑、青の各色光を合成するプリズムと、
１個の独立した金属材で構成され、所定の偏光方向の光を通す偏光板または光の位相差を補償する光学補償素子のいずれか一方または両方を保持する部材であって、上記ライトバルブ部材の上記複数の取付け用貫通孔に挿入される複数の突起部と、上記プリズムの上面部側及び下面部側に突出した取付け部とを備え、該取付け部により上記プリズムの上面部及び下面部に取付けられる保持部材と、
上記プリズムで色合成された光を拡大投射する投射レンズユニットと、
を備え、
上記保持部材が上記取付け部により上記プリズムの上面部及び下面部に固定され、かつ、該保持部材に対し上記ライトバルブ部材が、該ライトバルブ部材上の上記取付け用貫通孔のそれぞれに該保持部材上の上記突起部がそれぞれ挿入された状態で結合される構成としたことを特徴とする投射型映像表示装置の光学ユニット。 An optical unit of a projection-type image display device that irradiates light from a light source side to a light valve and forms an optical image according to an image display signal to project an enlarged image,
And said light valve, and a holding portion for holding the light valve at the periphery of the light valve, a light valve member having a plurality of mounting holes in the holding portion is provided,
A prism that has a dichroic film and synthesizes modulated red, green, and blue light emitted from the light valve member side;
A member that holds either one or both of a polarizing plate that passes light in a predetermined polarization direction and an optical compensation element that compensates for the phase difference of light, which is made of a single independent metal material, the light valve member a plurality of protrusions that are inserted into the plurality of mounting holes of the, and a mounting portion projecting on the upper surface side and lower surface side of the prism, the top portion and the bottom surface portion of the prism by attachment portion A retaining member to be attached;
A projection lens unit for enlarging and projecting the color synthesized by the prism;
With
The holding member is fixed to the upper surface portion and lower surface portion of the prism by the mounting portion, and the light valve member relative to the holding member, the holding member, each of the mounting holes on the light valve member An optical unit of a projection-type image display device, characterized in that the above projections are combined in a state of being inserted. 光源側からの光をライトバルブに照射し映像表示信号に応じた光学像を形成して拡大投射する投射型映像表示装置におけるライトバルブの固定構造であって、
上記ライトバルブと、該ライトバルブの周囲において該ライトバルブを保持する保持部とを有し、該保持部に複数の取付け用貫通孔が設けられたライトバルブ部材と、
ダイクロイック膜を有し、上記ライトバルブ部材側から出射される変調された赤、緑、青の各色光を合成するプリズムと、
１個の独立した金属材で構成され、所定の偏光方向の光を通す偏光板または光の位相差を補償する光学補償素子のいずれか一方または両方を保持する部材であって、上記ライトバルブ部材の上記複数の取付け用貫通孔に挿入される複数の突起部と、上記プリズムの上面部側及び下面部側に突出した取付け部とを備え、該取付け部により上記プリズムの上面部及び下面部に取付けられる保持部材と、
を備え、
上記保持部材が上記取付け部により上記プリズムの上面部及び下面部に固定され、かつ、該保持部材に対し上記ライトバルブ部材が、該ライトバルブ部材上の上記取付け用貫通孔のそれぞれに該保持部材上の上記突起部がそれぞれ挿入された状態で結合される構成としたことを特徴とする投射型映像表示装置におけるライトバルブの固定構造。 A light valve fixing structure in a projection-type image display device that irradiates light from a light source side to a light valve to form an optical image according to an image display signal and projects the enlarged image,
And said light valve, and a holding portion for holding the light valve at the periphery of the light valve, a light valve member having a plurality of mounting holes in the holding portion is provided,
A prism that has a dichroic film and synthesizes modulated red, green, and blue light emitted from the light valve member side;
A member that holds either one or both of a polarizing plate that passes light in a predetermined polarization direction and an optical compensation element that compensates for the phase difference of light, which is made of a single independent metal material, the light valve member a plurality of protrusions that are inserted into the plurality of mounting holes of the, and a mounting portion projecting on the upper surface side and lower surface side of the prism, the top portion and the bottom surface portion of the prism by attachment portion A retaining member to be attached;
With
The holding member is fixed to the upper surface portion and lower surface portion of the prism by the mounting portion, and the light valve member relative to the holding member, the holding member, each of the mounting holes on the light valve member A structure for fixing a light valve in a projection-type image display device, characterized in that the above-mentioned protrusions are joined in a state of being inserted.
JP2005119302A 2005-04-18 2005-04-18 Projection-type image display device, optical unit, and light valve fixing structure in projection-type image display device Expired - Fee Related JP4723276B2 (en)

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JP2000259094A (en) * 1999-03-12 2000-09-22 Seiko Epson Corp Optical device and projection type display device using the same
JP2002196694A (en) * 2000-12-27 2002-07-12 Sharp Corp Display module, display device and method for making the same
WO2004059382A1 (en) * 2002-12-24 2004-07-15 Seiko Epson Corporation Optical modulator holder, optical device, and projector
JP2005070504A (en) * 2003-08-26 2005-03-17 Seiko Epson Corp Optical device, projector and method for manufacturing optical device

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Publication number Priority date Publication date Assignee Title
JP2000259094A (en) * 1999-03-12 2000-09-22 Seiko Epson Corp Optical device and projection type display device using the same
JP2002196694A (en) * 2000-12-27 2002-07-12 Sharp Corp Display module, display device and method for making the same
WO2004059382A1 (en) * 2002-12-24 2004-07-15 Seiko Epson Corporation Optical modulator holder, optical device, and projector
JP2005070504A (en) * 2003-08-26 2005-03-17 Seiko Epson Corp Optical device, projector and method for manufacturing optical device

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