JP2013015582A - Pressing member and image projection device using the same - Google Patents

Pressing member and image projection device using the same Download PDF

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JP2013015582A
JP2013015582A JP2011146518A JP2011146518A JP2013015582A JP 2013015582 A JP2013015582 A JP 2013015582A JP 2011146518 A JP2011146518 A JP 2011146518A JP 2011146518 A JP2011146518 A JP 2011146518A JP 2013015582 A JP2013015582 A JP 2013015582A
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plate
light valve
pressing member
bent
bending
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Ryo Nomoto
諒 野本
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Canon Inc
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Canon Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a pressing member which secures a contact area between a transmission member and a radiation member in a wide range to allow the transmission member to be easily fixed to the radiation member, and an image projection device using the same.SOLUTION: The pressing member includes a first tabular part, a second tabular part and a fixed part which are formed on opposite sides of the first tabular part respectively, a first bending part formed between the first tabular part and the second tabular part, and a second bending part formed between the first tabular part and the fixed part. The second tabular part has a rear part adjacent to the first bending part, and a front part, the front part has a plurality of first extending parts, and the second tabular part has a third bending part. A bending direction of the first bending part is different from bending directions of the second bending part and the third bending part, and the first tabular part and the second tabular part are urged in the same rotation direction.

Description

本発明は、押圧部材及びそれを用いた画像投射装置に関するものである。   The present invention relates to a pressing member and an image projection apparatus using the pressing member.

従来、金属フレームによってライトバルブからヒートシンクへ熱伝導させる技術(特許文献1)や、ライトバルブを実装した金属フレームとヒートシンク等を電気的に接続する技術(特許文献2)が開示されている。   Conventionally, a technique for conducting heat from a light valve to a heat sink using a metal frame (Patent Document 1) and a technique for electrically connecting a metal frame mounted with a light valve to a heat sink (Patent Document 2) have been disclosed.

特開2008−39835号公報JP 2008-39835 A 特開2007−240769号公報JP 2007-240769 A

しかしながら、これら特許文献1,2に開示されている従来技術では、ライトバルブから延びる金属フレーム等の伝達部材とヒートシンク(放射部材)との接触面積が十分ではない。また、構造上、伝達部材のヒートシンク(放射部材)への固定も容易ではない。   However, in the prior art disclosed in these Patent Documents 1 and 2, the contact area between the transmission member such as a metal frame extending from the light valve and the heat sink (radiation member) is not sufficient. In addition, due to the structure, it is not easy to fix the transmission member to the heat sink (radiating member).

そこで、本発明の目的は、伝達部材と放射部材との接触面積を広範囲に確保し、伝達部材の放射部材への固定を容易に行える押圧部材及びそれを用いた画像投射装置を提供することにある。   Accordingly, an object of the present invention is to provide a pressing member that can secure a wide contact area between a transmission member and a radiation member and can easily fix the transmission member to the radiation member, and an image projection apparatus using the same. is there.

上述の目的を達成するために、本発明に係る押圧部材は、第一の板状部と、前記第一の板状部の相対する側にそれぞれ形成された第二の板状部及び固定部と、前記第一の板状部と前記第二の板状部の間に形成された第一の屈曲部と、前記第一の板状部と前記固定部の間に形成された第二の屈曲部と、を有する押圧部材であって、前記第二の板状部は、前記第一の屈曲部に隣接する後部、及び、前記後部の前記第一の屈曲部と相対する側に隣接する前部を有し、前記前部は、前記後部に向かって延在する複数の第一の延設部を有し、前記第二の板状部は、前記複数の第一の延設部の少なくとも一つと前記後部とを連結する第三の屈曲部を有し、前記第一の屈曲部の屈曲方向と、前記第二の屈曲部及び前記第三の屈曲部の屈曲方向が、互いに異なる方向であり、前記第一の板状部及び前記第二の板状部は、互いに同じ回転方向に付勢されていることを特徴とする。   In order to achieve the above-described object, the pressing member according to the present invention includes a first plate-like portion, a second plate-like portion and a fixing portion respectively formed on opposite sides of the first plate-like portion. A first bent portion formed between the first plate-like portion and the second plate-like portion, and a second bent portion formed between the first plate-like portion and the fixed portion. A pressing member having a bent portion, wherein the second plate-like portion is adjacent to the rear portion adjacent to the first bent portion and to the side of the rear portion facing the first bent portion. A front portion, the front portion includes a plurality of first extending portions extending toward the rear portion, and the second plate-shaped portion includes a plurality of first extending portions. A third bent portion connecting at least one of the rear portion and the bent direction of the first bent portion, and the bent directions of the second bent portion and the third bent portion are different from each other; A direction, said first plate portion and said second plate portion, characterized in that it is biased in the same rotational direction.

また、上述の目的を達成すために、本発明に係る画像投射装置は、光源と、前記光源から出射された光束を変調するライトバルブと、前記ライトバルブに接触するヒートシンクと、前記ヒートシンクに接触する伝達部材と、を有するライトバルブユニットと、前記ライトバルブを電気的に駆動する基板と、前記基板を保持する基板保持部材と、を有し、前記ライトバルブユニットと前記基板の間に前記基板保持部材が配置された画像投射装置であって、前記基板保持部材が前述の押圧部材を有し、前記押圧部材の前記固定部が前記基板保持部材に固定され、前記押圧部材の前記第一の延設部により前記伝達部材が前記基板保持部材に押圧されていることを特徴とする。   In order to achieve the above-described object, an image projection apparatus according to the present invention includes a light source, a light valve that modulates a light beam emitted from the light source, a heat sink that contacts the light valve, and a contact with the heat sink. A light valve unit, a substrate that electrically drives the light valve, and a substrate holding member that holds the substrate, and the substrate between the light valve unit and the substrate. An image projection apparatus in which a holding member is disposed, wherein the substrate holding member has the pressing member described above, the fixing portion of the pressing member is fixed to the substrate holding member, and the first of the pressing member The transmission member is pressed against the substrate holding member by an extending portion.

本発明によれば、伝達部材と(基板を保持する機能の他に放射部材としての機能も有する)基板保持部材との接触面積を広範囲に確保し、伝達部材の基板保持部材への固定を容易に行える押圧部材及びそれを用いた画像投射装置を提供することができる。   According to the present invention, the contact area between the transmission member and the substrate holding member (which also has a function as a radiation member in addition to the function of holding the substrate) is secured over a wide range, and the transmission member can be easily fixed to the substrate holding member. It is possible to provide a pressing member that can be used and an image projection apparatus using the pressing member.

本発明の一実施例に係る(a)押圧部材(緑用のライトバルブ用、青用のライトバルブ用)の斜視図、(b)押圧部材(赤用のライトバルブ用)の斜視図、(c)押圧部材(赤用のライトバルブ用)の平面図(A) Perspective view of pressing member (for green light valve, for blue light valve) according to one embodiment of the present invention, (b) Perspective view of pressing member (for red light valve), c) Plan view of pressing member (for red light valve) 本発明の一実施例に係るライトバルブ駆動ユニットの斜視図。The perspective view of the light valve drive unit concerning one example of the present invention. 本発明の一実施例に係る(a)ライトバルブユニットの斜視図、(b)ライトバルブユニットを図3(a)のA方向から見た平面図。(A) The perspective view of a light valve unit which concerns on one Example of this invention, (b) The top view which looked at the light valve unit from the A direction of Fig.3 (a). 本発明の一実施例に係る(a)ライトバルブ、ヒートシンクの斜視図、(b)ライトバルブ、ヒートシンク及び伝達部材の斜視図。(A) The perspective view of a light valve and a heat sink which concerns on one Example of this invention, (b) The perspective view of a light valve, a heat sink, and a transmission member. 本発明の一実施例に係る(a)基板保持部材の斜視図(押圧部材の固定前)、(b)基板保持部材の斜視図(押圧部材の固定後)。(A) Perspective view of substrate holding member (before fixing of pressing member), (b) Perspective view of substrate holding member (after fixing of pressing member) according to one embodiment of the present invention. 本発明の一実施例に係る(a)ライトバルブユニット、基板保持部材の斜視図(フレキシブル配線基板を基板保持部材へ通す前)、(b)ライトバルブユニット、基板保持部材の斜視図(フレキシブル配線基板を基板保持部材へ通した後)。1A is a perspective view of a light valve unit and a board holding member (before passing the flexible wiring board through the board holding member), and FIG. 3B is a perspective view of the light valve unit and the board holding member (flexible wiring). After passing the substrate through the substrate holding member). 本発明の一実施例に係るライトバルブユニット、基板保持部材の斜視図(図6(b)のB範囲の拡大斜視図)。The perspective view of the light valve unit which concerns on one Example of this invention, and a board | substrate holding member (enlarged perspective view of the B range of FIG.6 (b)). 本発明の一実施例に係るライトバルブユニット、基板保持部材の断面図(図7のC−C断面図)。Sectional drawing (CC sectional drawing of FIG. 7) of the light valve unit which concerns on one Example of this invention, and a board | substrate holding member. 本発明の一実施例に係る(a)ライトバルブユニット、基板保持部材、基板の斜視図(フレキシブル配線基板を基板へ通す前)、(b)ライトバルブユニット、基板保持部材、基板の斜視図(フレキシブル配線基板を基板へ通した後)。(A) Light valve unit, substrate holding member, perspective view of substrate (before passing flexible wiring board through substrate), (b) Light valve unit, substrate holding member, substrate perspective view according to one embodiment of the present invention ( After passing the flexible wiring board through the board). 本発明の一実施例に係るライトバルブユニット、基板保持部材、基板の断面図(図9のD−D断面図)。Sectional drawing (DD sectional drawing of FIG. 9) of the light valve unit which concerns on one Example of this invention, a board | substrate holding member, and a board | substrate. 本発明の他の実施例に係る(a)ライトバルブ、ヒートシンクの斜視図、(b)ライトバルブ、ヒートシンク及び伝達部材の斜視図。(A) The perspective view of a light valve and a heat sink which concerns on the other Example of this invention, (b) The perspective view of a light valve, a heat sink, and a transmission member. 本発明の他の実施例に係る押圧部材(赤用のライトバルブ用)の平面図。The top view of the press member (for the light valve for red) which concerns on the other Example of this invention.

以下に、本発明の好ましい実施の形態を、添付の図面に基づいて詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

まず、図1を用いて、本発明の画像投射装置において用いる固定ばね部材(押圧部材)6の構造について説明する。   First, the structure of the fixed spring member (pressing member) 6 used in the image projection apparatus of the present invention will be described with reference to FIG.

図1は、本発明の第1の実施例に係る押圧部材の斜視図((a),(b))及び平面図((c))である。具体的には、(a)押圧部材(緑用のライトバルブ用、青用のライトバルブ用)6の斜視図、(b)押圧部材(赤用のライトバルブ用)6の斜視図、(c)押圧部材(赤用のライトバルブ用)6の平面図である。図1(a)及び(b)に示した押圧部材は、大きさ等は異なるものの、基本的な形状やそれによる効果は同様なので、ここでは同じ符号を付している。   FIG. 1 is a perspective view ((a), (b)) and a plan view ((c)) of a pressing member according to a first embodiment of the present invention. Specifically, (a) a perspective view of a pressing member (for a green light valve, for a blue light valve) 6, (b) a perspective view of a pressing member (for a red light valve) 6, (c) ) A plan view of a pressing member (for a red light valve) 6. Although the pressing members shown in FIGS. 1A and 1B are different in size and the like, the basic shapes and the effects thereof are the same, and thus the same reference numerals are given here.

図1(a)及び(b)に示されているように、固定ばね部材(押圧部材)6は、第一の板状部63、第二の板状部62、固定部64を有している。第一の板状部63の相対する側に第二の板状部62及び固定部64がそれぞれ形成されている。   As shown in FIGS. 1A and 1B, the fixed spring member (pressing member) 6 includes a first plate-shaped portion 63, a second plate-shaped portion 62, and a fixed portion 64. Yes. A second plate portion 62 and a fixing portion 64 are formed on opposite sides of the first plate portion 63, respectively.

また、図1(c)に示されているように、第一の板状部63と第二の板状部62の間に第一の屈曲部61が形成され、第一の板状部63と固定部64の間に第二の屈曲部65が形成されている。固定ばね部材(押圧部材)6は、第二の屈曲部62から固定部64にかけて同じ材質、例えば金属等で一体に形成されており、第一の屈曲部61及び第二の屈曲部65は、固定ばね部材(押圧部材)6を形成する際に屈曲形状に形成された箇所である。   Further, as shown in FIG. 1C, a first bent portion 61 is formed between the first plate portion 63 and the second plate portion 62, and the first plate portion 63. A second bent portion 65 is formed between the fixed portion 64 and the fixed portion 64. The fixed spring member (pressing member) 6 is integrally formed of the same material, for example, metal or the like from the second bent portion 62 to the fixed portion 64. The first bent portion 61 and the second bent portion 65 are: This is a portion formed in a bent shape when the fixed spring member (pressing member) 6 is formed.

図1(c)及び後述する図12においては、第一の屈曲部61及び第二の屈曲部65の屈曲形状は表現されていないが、実際の固定ばね部材(押圧部材)6においては、図1(a)及び(b)と同様に、第一の屈曲部61及び第二の屈曲部65には屈曲形状が形成されている。固定部64は、後述する板金(基板保持部材)5に固定ばね部材(押圧部材)6を、例えばネジ留め等で固定するための箇所であり、そのための固定穴65aが形成されている。   In FIG. 1C and FIG. 12 to be described later, the bent shapes of the first bent portion 61 and the second bent portion 65 are not expressed, but in the actual fixed spring member (pressing member) 6, As in 1 (a) and (b), the first bent portion 61 and the second bent portion 65 are bent. The fixing part 64 is a part for fixing the fixing spring member (pressing member) 6 to a sheet metal (substrate holding member) 5 described later by, for example, screwing or the like, and a fixing hole 65a is formed therefor.

前記第二の板状部62は、第一の屈曲部61から近い順に、後部62c、前部62d、そして後部62及び前部62dとの間に形成された第三の屈曲部62bからなる。後部62cは、第一の屈曲部61に隣接するように形成されており、後部62cの第一の屈曲部61と相対する側に、第三の屈曲部62bを挟んで隣接するように前部62dが形成されている。   The second plate-like portion 62 includes a rear portion 62c, a front portion 62d, and a third bent portion 62b formed between the rear portion 62 and the front portion 62d in the order closer to the first bent portion 61. The rear portion 62c is formed so as to be adjacent to the first bent portion 61, and the front portion so as to be adjacent to the first bent portion 61 of the rear portion 62c with the third bent portion 62b interposed therebetween. 62d is formed.

前部62dには、後部62cに向かって延在するように複数の第一の延設部62dが形成されている。複数の第一の延設部62dの少なくとも一つ、ここでは両端の第一の延設部62d,62dと後部62cとを連結する第三の屈曲部62bが形成されている。これにより、第二の板状部82の両端付近を中央付近よりもより強く押圧することができる。   A plurality of first extending portions 62d are formed on the front portion 62d so as to extend toward the rear portion 62c. A third bent portion 62b that connects at least one of the plurality of first extending portions 62d, here, the first extending portions 62d and 62d at both ends and the rear portion 62c, is formed. Thereby, the vicinity of both ends of the second plate-like portion 82 can be pressed more strongly than the vicinity of the center.

第一の屈曲部61の屈曲方向と、前記第二の屈曲部65及び前記第三の屈曲部62bの屈曲方向は、互いに異なる方向である。つまり、図1(a)及び(b)においては、第一の屈曲部61の山形状が上を向くように屈曲しているのに対し、第二の屈曲部65及び第三の屈曲部の山形状が下を向くように屈曲している。特に、第一の屈曲部61の屈曲方向(第一の板状部の固定部に対する屈曲方向)と、第二の屈曲部65の屈曲方向(第二の板状部62の第一の板状部63に対する屈曲方向)とが、互いに逆方向であることが効果を奏する上で特に好ましい構成である。   The bending direction of the first bending portion 61 and the bending directions of the second bending portion 65 and the third bending portion 62b are different from each other. That is, in FIGS. 1A and 1B, the first bent portion 61 is bent so that the mountain shape faces upward, whereas the second bent portion 65 and the third bent portion are not bent. It is bent so that the mountain shape faces down. In particular, the bending direction of the first bent portion 61 (the bending direction of the first plate-like portion with respect to the fixed portion) and the bending direction of the second bent portion 65 (the first plate-like shape of the second plate-like portion 62). The bending direction with respect to the portion 63 is preferably opposite to each other in order to achieve an effect.

第一の板状部63及び第二の板状部62は、互いに同じ回転方向に付勢されている。つまり、図1(a)及び(b)においては、第一の板状部63は固定部64に対して下方向(図1(a)及び(b)中での下方向)に付勢されており、第二の板状部62は固定部64に対して同じく下方向(図1(a)及び(b)中での下方向)に付勢されている。ここで、第一の板状部63は固定部64に対して図1(b)で時計回り(図1(a)では反時計回り)の方向に付勢されており(時計回りの方向に変位するように力を加えられている)、第二の板状部62は第一の板状部63に対して(固定部64に対しても)同じく図1(b)で時計回りの方向に付勢されている。第一の板状部63及び第二の板状部62への付勢はばね力によるものであるが、本発明はそれに限られず、その他の手段により付勢してもよい。   The first plate-like portion 63 and the second plate-like portion 62 are biased in the same rotational direction. That is, in FIGS. 1A and 1B, the first plate-like portion 63 is biased downward (downward in FIGS. 1A and 1B) with respect to the fixed portion 64. Similarly, the second plate-like portion 62 is urged downward (downward in FIGS. 1A and 1B) with respect to the fixed portion 64. Here, the first plate-like portion 63 is biased in the clockwise direction in FIG. 1B (counterclockwise in FIG. 1A) with respect to the fixed portion 64 (in the clockwise direction). The second plate-like portion 62 is applied to the first plate-like portion 63 (and also to the fixed portion 64) in the clockwise direction in FIG. Is being energized. The biasing to the first plate-like portion 63 and the second plate-like portion 62 is due to the spring force, but the present invention is not limited to this, and may be biased by other means.

また、第二の板状部62の前部62d及び後部62cも、互いに同じ回転方向に付勢されている。つまり、図1(a)及び(b)においては、前部62dには固定部64に対して上方向(図1(a)及び(b)中での上方向)にばね力が付勢されているのに対し、後部62cには固定部64に対して下方向(図1(a)及び(b)中での下方向)にばね力が付勢されている。第二の板状部62の前部62d及び後部62cへの付勢はばね力によるものであるが、本発明はそれに限られず、その他の手段により付勢してもよい。   The front part 62d and the rear part 62c of the second plate-like part 62 are also urged in the same rotational direction. That is, in FIGS. 1A and 1B, the front portion 62d is biased upward with respect to the fixed portion 64 (upward in FIGS. 1A and 1B). On the other hand, the rear portion 62c is biased with a spring force downward with respect to the fixed portion 64 (downward in FIGS. 1A and 1B). The urging of the second plate-like portion 62 toward the front portion 62d and the rear portion 62c is due to the spring force, but the present invention is not limited to this, and may be urged by other means.

また、第一の屈曲部61及び第二の屈曲部65により生じるばね力(ばね定数)は、第三の屈曲部62bにより生じるばね力(ばね定数)よりも強くなるように形成されている。また、この第三の屈曲部は、蝶番のようにばね力を持たない屈曲可能な構成としても構わない。   Further, the spring force (spring constant) generated by the first bent portion 61 and the second bent portion 65 is formed to be stronger than the spring force (spring constant) generated by the third bent portion 62b. The third bent portion may be configured to be bendable without a spring force like a hinge.

図1(a)及び(b)におけるような板ばね構造の他に、第一の屈曲部61及び第二の屈曲部65はそれぞれ、第一の板状部63と第二の板状部62を連結する蝶番構造及び第一の板状部63と固定部64を連結する蝶番構造を有し、当該蝶番構造に設けられた弾性部材(コイルばねなど)より、第一の板状部及び第二の板状部は付勢されてもよい。第二の板状部62の前部62d及び後部62cについては、第三の屈曲部62bが小さいため、図1(a)及び(b)におけるような板ばね構造以外により付勢させることは難しいが、小さなばね等と上記蝶番構造とを用いて付勢させてもよい。   In addition to the leaf spring structure as shown in FIGS. 1A and 1B, the first bent portion 61 and the second bent portion 65 are a first plate portion 63 and a second plate portion 62, respectively. A hinge structure for connecting the first plate-like portion 63 and a hinge structure for connecting the first plate-like portion 63 and the fixing portion 64, and the first plate-like portion and the first plate-like member are formed by an elastic member (such as a coil spring) provided in the hinge structure. The second plate-like portion may be biased. About the front part 62d and the rear part 62c of the 2nd plate-shaped part 62, since the 3rd bending part 62b is small, it is difficult to energize other than a leaf | plate spring structure like FIG. 1 (a) and (b). However, it may be biased using a small spring or the like and the hinge structure.

板状部を付勢する構造として板ばね構造を用いる場合には、屈曲部(第一の屈曲部6、第二の屈曲部65、第三の屈曲部62b)の曲げ幅(屈曲部の長さ)を調整することにより、板ばねのばね力(ばね定数)を適宜調整することができる。また、板厚を変更したり、板の幅を変更したりすることによっても、板ばねのばね力(ばね定数)を適宜調整することができる。   When a leaf spring structure is used as a structure for urging the plate-like portion, the bending width (the length of the bending portion) of the bending portion (the first bending portion 6, the second bending portion 65, the third bending portion 62b) is used. The spring force (spring constant) of the leaf spring can be adjusted as appropriate by adjusting the height). Moreover, the spring force (spring constant) of a leaf | plate spring can also be adjusted suitably also by changing plate | board thickness or changing the width | variety of a board | plate.

このような構造により、固定ばね部材(押圧部材)6は、固定部64により板金(基板保持部材)5に固定された際に、後述する伝達部材2を板金(基板保持部材)に広い接触面積(前部62d)で押圧することができる。また、このような構造を有する固定ばね部材(押圧部材)6は、伝達部材2の板金(基板保持部材)5への固定も容易に行える。   With such a structure, when the fixed spring member (pressing member) 6 is fixed to the sheet metal (substrate holding member) 5 by the fixing portion 64, the transmission member 2 described later has a wide contact area with the sheet metal (substrate holding member). (Front part 62d) can be pressed. Further, the fixed spring member (pressing member) 6 having such a structure can easily fix the transmission member 2 to the sheet metal (substrate holding member) 5.

固定ばね部材(押圧部材)6に、第一の板状部63の両端部から第一の板状部63の外側に向かって延在する保持部(第二の延設部)63a,63aが設けられているが、これにより、伝達部材2を挟み込む(押圧する)際に保持部(第二の延設部)63a,63aを人が保持し、板金(基板保持部材)5から第三の屈曲部62bを浮き上がらせることができる。これにより、組立容易性が向上すると共に、第三の屈曲部62b周辺を保持することにより第三の屈曲部62b周辺が塑性変形してしまうことを防ぐことができる。   The fixed spring member (pressing member) 6 has holding portions (second extending portions) 63 a and 63 a extending from both end portions of the first plate-like portion 63 toward the outside of the first plate-like portion 63. However, when the transmission member 2 is sandwiched (pressed), the holding portions (second extending portions) 63a and 63a are held by a person, and the sheet metal (substrate holding member) 5 The bent part 62b can be lifted. As a result, the ease of assembly can be improved, and the periphery of the third bent portion 62b can be prevented from being plastically deformed by holding the periphery of the third bent portion 62b.

次に、図2を参照して、本発明の画像投射装置において用いるライトバルブ駆動ユニットの全体構成について説明する。   Next, the overall configuration of the light valve drive unit used in the image projection apparatus of the present invention will be described with reference to FIG.

ライトバルブ駆動ユニット100の基本構成は、色分離合成光学系(ライトバルブユニット)1の構成部材である、光源(図示せず)から出射された光束を変調するライトバルブ4と、ライトバルブ4に取り付けられたヒートシンク3と、ライトバルブ4を電気的に駆動する基板7と、基板7を保持する板金(基板保持部材)5である。   The basic configuration of the light valve driving unit 100 includes a light valve 4 that modulates a light beam emitted from a light source (not shown), which is a component of the color separation / synthesis optical system (light valve unit) 1, and a light valve 4. These are a heat sink 3 attached, a substrate 7 that electrically drives the light valve 4, and a sheet metal (substrate holding member) 5 that holds the substrate 7.

それに加え、ヒートシンク3の熱拡散を更に効率的に行うため、ヒートシンクに貼付された(接触する)伝達部材2としてのグラファイトシートと、伝達部材2を板金(基板保持部材)5に接触、固定する押圧部材である固定ばね部材6によってライトバルブ駆動ユニット100は構成される。   In addition, in order to more efficiently diffuse the heat sink 3, the graphite sheet as the transmission member 2 affixed (contacted) to the heat sink and the transmission member 2 are contacted and fixed to the sheet metal (substrate holding member) 5. The light valve driving unit 100 is constituted by the fixed spring member 6 which is a pressing member.

次に、図3から図10を参考にライトバルブ駆動ユニット100の組立構成について説明する。   Next, an assembly configuration of the light valve drive unit 100 will be described with reference to FIGS. 3 to 10.

図3は(a)色分離合成光学系(ライトバルブユニット)1の斜視図、(b)ライトバルブユニットを(a)のA方向から見た平面図である。図4は(a)ライトバルブ、ヒートシンクの斜視図、(b)ライトバルブ及び当該ヒートシンクに接触する伝達部材4の斜視図である。   3A is a perspective view of the color separation / synthesis optical system (light valve unit) 1, and FIG. 3B is a plan view of the light valve unit viewed from the A direction of FIG. 4A is a perspective view of the light valve and the heat sink, and FIG. 4B is a perspective view of the transmission member 4 that contacts the light valve and the heat sink.

図3(a)、図4の通り、色分離合成光学系(ライトバルブユニット)1内の一部として、光源(図示せず)から出射された光束を変調するライトバルブ4はフレキシブル配線基板41を有しており、その背面にヒートシンク3が接触するように配置される。ヒートシンク3はライトバルブの発熱および光束の吸収、輻射によって生じる熱を放熱する。ヒートシンク3には、主として、ライトバルブからの放熱を効率的に行うために、熱の伝達部材2としてグラファイトシートが貼り付けてある。本実施例におけるグラファイトシートは平面方向の熱伝導効率が400W/m・k、厚さ方向の熱伝導効率が3.5W/m・kであるが、この値に限るものではない。   As shown in FIGS. 3A and 4, a light valve 4 that modulates a light beam emitted from a light source (not shown) as a part of the color separation / synthesis optical system (light valve unit) 1 is a flexible wiring board 41. It is arranged so that the heat sink 3 is in contact with the back surface. The heat sink 3 radiates heat generated by light valve heat generation, light flux absorption and radiation. In order to efficiently dissipate heat from the light valve, a graphite sheet is attached to the heat sink 3 as the heat transfer member 2. The graphite sheet in this example has a heat conduction efficiency in the plane direction of 400 W / m · k and a heat conduction efficiency in the thickness direction of 3.5 W / m · k, but is not limited to this value.

なお、グラファイトシート2は後述する銅箔テープ20と比較して、高い熱伝導性を有し、ライトバルブからの放熱を促進する効果に優れる。また、後述する銅箔テープ20よりは劣るものの、ライトバルブを発信源とする不要輻射ノイズを抑制する効果も有する。   In addition, the graphite sheet 2 has high thermal conductivity compared with the copper foil tape 20 mentioned later, and is excellent in the effect which accelerates | stimulates the thermal radiation from a light valve. Moreover, although it is inferior to the copper foil tape 20 mentioned later, it also has the effect of suppressing the unnecessary radiation noise which makes a light valve a transmission source.

図3の色分離合成光学系(ライトバルブユニット)1には3つのライトバルブ4R,4G,4Bが存在し、それぞれ、4Rは赤(R)、4Gは緑(G)、そして4Bは青(B)の波長領域の光を反射し、変調するライトバルブである。   In the color separation / synthesis optical system (light valve unit) 1 of FIG. 3, there are three light valves 4R, 4G, 4B, 4R is red (R), 4G is green (G), and 4B is blue ( The light valve reflects and modulates light in the wavelength region B).

図3(b)を参照して色分離合成光学系(ライトバルブユニット)1の基本構成を示す。10は青(B)と赤(R)の波長領域の光を反射し、緑(G)の波長領域の光を透過するダイクロイックミラーである。11は透明基板に偏光素子を貼り付けたG用の入射側偏光板であり、P偏光光のみを透過する。12はP偏光光を透過し、S偏光光を反射する第1の偏光ビームスプリッタであり、偏光分離面を有する。   A basic configuration of the color separation / synthesis optical system (light valve unit) 1 will be described with reference to FIG. A dichroic mirror 10 reflects light in the blue (B) and red (R) wavelength regions and transmits light in the green (G) wavelength region. Reference numeral 11 denotes an incident-side polarizing plate for G in which a polarizing element is attached to a transparent substrate, and transmits only P-polarized light. Reference numeral 12 denotes a first polarization beam splitter that transmits P-polarized light and reflects S-polarized light, and has a polarization separation surface.

4R,4G,4Bはそれぞれ入射した光を反射するとともに画像変調する、赤用のライトバルブ(反射型液晶表示素子)、緑用のライトバルブ、青用のライトバルブである。14R,14G,14Bはそれぞれ、赤用の1/4波長板、緑用の1/4波長板、青用の1/4波長板である。   4R, 4G, and 4B are a red light valve (reflection liquid crystal display element), a green light valve, and a blue light valve that reflect incident light and modulate the image, respectively. 14R, 14G, and 14B are a quarter wavelength plate for red, a quarter wavelength plate for green, and a quarter wavelength plate for blue, respectively.

13はRの色純度を高めるためにオレンジ光をランプに戻すトリミングフィルタで、15は透明基板に偏光素子を貼着したRB用の入射側偏光板であり、P偏光のみを透過する。16はRの光の偏光方向を90度変換し、Bの光の偏光方向は変換しない色選択性位相差板である。17はP偏光を透過し、S偏光を反射する第2の偏光ビームスプリッタであり、偏光分離面を有する。   Reference numeral 13 denotes a trimming filter that returns orange light to the lamp in order to increase the color purity of R. Reference numeral 15 denotes an incident-side polarizing plate for RB in which a polarizing element is attached to a transparent substrate, and transmits only P-polarized light. Reference numeral 16 denotes a color selective phase difference plate that converts the polarization direction of the R light by 90 degrees and does not convert the polarization direction of the B light. Reference numeral 17 denotes a second polarization beam splitter that transmits P-polarized light and reflects S-polarized light, and has a polarization separation surface.

18BはB用出射側偏光板(偏光素子)であり、BのS偏光のみを透過(整流)し(他の色については作用しない)、18GはS偏光のみを透過させるG用出側偏光板である。19はRB光を透過し、G光を反射するダイクロイックプリズムである。   18B is an exit side polarizing plate (polarizing element) for B, which transmits (rectifies) only the S polarized light of B (does not work for other colors), and 18G is an outgoing side polarizing plate for G that transmits only the S polarized light. It is. Reference numeral 19 denotes a dichroic prism that transmits RB light and reflects G light.

以上のダイクロイックミラー10からダイクロイックプリズム19により、色分解合成光学系(ライトバルブユニット)1が構成される。   The above dichroic mirror 10 and dichroic prism 19 constitute a color separation / synthesis optical system (light valve unit) 1.

次に、色分離合成光学系(ライトバルブユニット)1に、ライトバルブ4を電気的に駆動する基板7を保持する板金(基板保持部材)5を取り付ける。図4の通り、ライトバルブ4に取り付けられたヒートシンク3の熱拡散を更に効率的に行うために、ヒートシンク3にグラファイトシートからなる伝達部材2が接触(貼付)されている。図5の通り、板金(基板保持部材)5には伝達部材2を固定するための、固定ばね部材(押圧部材)6が各ライトバルブ4に対応して取り付けられている。板金(基板保持部材)5にはライトバルブ4のフレキシブル配線基板41と伝達部材2を通す開口および切欠が設けられている。   Next, a sheet metal (substrate holding member) 5 that holds a substrate 7 that electrically drives the light valve 4 is attached to the color separation / synthesis optical system (light valve unit) 1. As shown in FIG. 4, in order to more efficiently diffuse the heat sink 3 attached to the light valve 4, the transmission member 2 made of a graphite sheet is contacted (attached) to the heat sink 3. As shown in FIG. 5, a fixing spring member (pressing member) 6 for fixing the transmission member 2 is attached to the sheet metal (substrate holding member) 5 corresponding to each light valve 4. The sheet metal (substrate holding member) 5 is provided with an opening and a notch through which the flexible wiring substrate 41 of the light valve 4 and the transmission member 2 pass.

図6〜8の通り、色分離合成光学系(ライトバルブユニット)に板金(基板保持部材)5をビス締めによって取り付ける際、固定ばね部材(押圧部材)6によって、板金(基板保持部材)5と固定ばね部材(押圧部材)6で伝達部材2を挟み込み、伝達部材2を板金(基板保持部材)5に押圧する(図7に、図6(b)のB範囲の拡大斜視図、図8に、図7のC−C断面図を示す)。   As shown in FIGS. 6 to 8, when the sheet metal (substrate holding member) 5 is attached to the color separation / synthesis optical system (light valve unit) by screwing, the fixing spring member (pressing member) 6 The transmission member 2 is sandwiched by a fixed spring member (pressing member) 6 and the transmission member 2 is pressed against a sheet metal (substrate holding member) 5 (in FIG. 7, an enlarged perspective view of a range B in FIG. 6B, and FIG. 8). CC sectional drawing of FIG. 7 is shown).

伝達部材2をばね力で固定することにより、伝達部材2に回転応力や引っ張り応力などの負荷をかけずに固定することができ、ライトバルブ4への負荷応力も減少する。また、第一の屈曲部61及び第二の屈曲部65により生じるばね力(ばね定数)が、第三の屈曲部62bにより生じるばね力(ばね定数)よりも強くなるように形成されているので、固定ばね部材(押圧部材)6により伝達部材2を押圧する際に、第三の屈曲部62bが屈曲し、広い接触面積を有する前部62dの全面が伝達部材2に接触され、それにより、ライトバルブからの放熱の促進や不要輻射ノイズの抑制が効率的に行えるようにすることができる。   By fixing the transmission member 2 with a spring force, the transmission member 2 can be fixed without applying a load such as rotational stress or tensile stress, and the load stress on the light valve 4 is also reduced. Further, the spring force (spring constant) generated by the first bent portion 61 and the second bent portion 65 is formed to be stronger than the spring force (spring constant) generated by the third bent portion 62b. When the transmission member 2 is pressed by the fixed spring member (pressing member) 6, the third bent portion 62b is bent, and the entire front surface 62d having a wide contact area is brought into contact with the transmission member 2, whereby It is possible to efficiently promote heat dissipation from the light valve and suppress unnecessary radiation noise.

板金(基板保持部材)5と色分離合成光学系(ライトバルブユニット)1が位置決め固定され、色分離合成光学系(ライトバルブユニット)とライトバルブ4は、ライトバルブ4R,4G,4Bが合成位置合わせを行うため、ユニット個々で微小に位置が異なる状態で固定される。そのため、板金(基板保持部材)5とライトバルブ4の固定には自由度が必要となり、強制的に位置決めを行うと、製造過程によって合成されたライトバルブ4の位置が微小にずれてしまう。また、伝達部材2の固定時に負荷をかけないように、3つのライトバルブ4を組み付けることは、組立作業上大変困難である。   The sheet metal (substrate holding member) 5 and the color separation / synthesis optical system (light valve unit) 1 are positioned and fixed, and the color separation / synthesis optical system (light valve unit) and the light valve 4 are combined with the light valves 4R, 4G, and 4B. In order to perform alignment, each unit is fixed in a slightly different position. Therefore, a degree of freedom is required to fix the sheet metal (substrate holding member) 5 and the light valve 4, and if the positioning is forcibly performed, the position of the light valve 4 synthesized by the manufacturing process is slightly shifted. Further, it is very difficult to assemble the three light valves 4 so as not to apply a load when the transmission member 2 is fixed.

しかし、本発明の固定ばね部材(押圧部材)6は、伝達部材2を板金(基板保持部材)5に容易に固定できるため、組立性向上とライトバルブ4の負荷応力軽減を行うことが出来る。   However, since the fixed spring member (pressing member) 6 of the present invention can easily fix the transmission member 2 to the sheet metal (substrate holding member) 5, it is possible to improve the assembling property and reduce the load stress of the light valve 4.

最後に、図9の通りライトバルブ4を駆動する基板7を板金(基板保持部材)5に取り付け、基板7の開口および切欠きからライトバルブ4のフレキシブル配線基板41を通して、基板7のコネクタに接続する。これによってライトバルブ駆動ユニット100の組立を完成する(図10に、図9のD−D断面図を示す)。   Finally, as shown in FIG. 9, the substrate 7 that drives the light valve 4 is attached to a sheet metal (substrate holding member) 5 and connected to the connector of the substrate 7 through the flexible wiring substrate 41 of the light valve 4 from the opening and notch of the substrate 7. To do. Thus, the assembly of the light valve drive unit 100 is completed (FIG. 10 shows a DD cross-sectional view of FIG. 9).

以下、図11を参照して、本発明の画像投射装置において用いる他のライトバルブ駆動ユニットについて説明する。   Hereinafter, with reference to FIG. 11, another light valve driving unit used in the image projection apparatus of the present invention will be described.

ライトバルブ駆動ユニットの構成は、ヒートシンクに貼付された伝達部材20として銅箔テープ(図11)を用いたこと以外は、第1の実施例と同様とした。銅箔テープ20は第1の実施例において用いたグラファイトシート2と比較して、ライトバルブを発信源とする不要輻射ノイズを抑制する効果に優れる。また、グラファイトシート2よりは劣るものの、熱伝導性にも優れるので、ライトバルブからの放熱を促進する効果も有する。   The configuration of the light valve drive unit was the same as that of the first example except that a copper foil tape (FIG. 11) was used as the transmission member 20 attached to the heat sink. Compared with the graphite sheet 2 used in the first embodiment, the copper foil tape 20 is excellent in the effect of suppressing unnecessary radiation noise using a light valve as a transmission source. Moreover, although it is inferior to the graphite sheet 2, since it is excellent also in heat conductivity, it also has the effect of accelerating the heat radiation from the light valve.

伝達部材20としての銅箔テープは、ヒートシンク3と貼り付く面とその反対面の板金(基板保持部材)5と接続される面が存在する。   The copper foil tape as the transmission member 20 has a surface connected to the heat sink 3 and a surface connected to the sheet metal (substrate holding member) 5 on the opposite surface.

前記銅箔テープ20はヒートシンク3と貼り付く箇所に、導電性の粘着剤を用いている。また、ヒートシンク3と貼り付く面側で、ヒートシンク3と接触する部分と固定ばね部材6と接触する部分以外は絶縁膜および絶縁シートで保護されている。このことより、基板7との接触やショートの可能性を防ぐ。   The copper foil tape 20 uses a conductive adhesive at a location where it adheres to the heat sink 3. Further, on the surface side to be attached to the heat sink 3, the portions other than the portion in contact with the heat sink 3 and the portion in contact with the fixed spring member 6 are protected with an insulating film and an insulating sheet. This prevents the possibility of contact with the substrate 7 or short circuit.

一方、ヒートシンク3と貼り付く面の反対面である、板金(基板保持部材)5と接続される面に関しては銅箔の状態である。   On the other hand, the surface connected to the sheet metal (substrate holding member) 5 which is the surface opposite to the surface to be attached to the heat sink 3 is in the state of copper foil.

上記の構造により、ヒートシンク3と板金(基板保持部材)5を導通させる事ができ、ライトバルブを発信源として発生する不要輻射ノイズを抑制することができる。   With the above structure, the heat sink 3 and the sheet metal (substrate holding member) 5 can be conducted, and unnecessary radiation noise generated using the light valve as a transmission source can be suppressed.

固定ばね部材(押圧部材)としては、第1の実施例において用いた固定ばね部材(押圧部材)6の他に、図12に示した固定ばね部材(押圧部材)8を用いることもできる。   As the fixed spring member (pressing member), in addition to the fixed spring member (pressing member) 6 used in the first embodiment, the fixed spring member (pressing member) 8 shown in FIG. 12 can also be used.

固定ばね部材(押圧部材)6と固定ばね部材(押圧部材)8の違いは、第二の板状部の構造にある。   The difference between the fixed spring member (pressing member) 6 and the fixed spring member (pressing member) 8 is in the structure of the second plate-like portion.

第1の実施例と同様に、後部82cは、第一の屈曲部61に隣接するように形成されており、後部82cの第一の屈曲部61と相対する側に、第三の屈曲部82bを挟んで隣接するように前部82dが形成されている。   Similar to the first embodiment, the rear portion 82c is formed adjacent to the first bent portion 61, and the third bent portion 82b is formed on the side of the rear portion 82c opposite to the first bent portion 61. A front portion 82d is formed so as to be adjacent to each other.

前部82dには、後部82cに向かって延在するように複数の第一の延設部82dが形成されている。固定ばね部材(押圧部材)8の第二の板状部82は、固定ばね部材(押圧部材)6の第二の板状部62と異なり、複数の第一の延設部82dの少なくとも一つ、ここでは中央付近の第一の延設部82dと後部82cの間に第三の屈曲部82bが形成されている。これにより、第二の板状部82の中央付近を両端付近よりもより強く押圧することができる。   A plurality of first extending portions 82d are formed on the front portion 82d so as to extend toward the rear portion 82c. Unlike the second plate-like portion 62 of the fixed spring member (pressing member) 6, the second plate-like portion 82 of the fixed spring member (pressing member) 8 is at least one of the plurality of first extending portions 82d. Here, a third bent portion 82b is formed between the first extending portion 82d near the center and the rear portion 82c. Thereby, the center vicinity of the 2nd plate-shaped part 82 can be pressed more strongly than both end vicinity.

図12に示した固定ばね部材(押圧部材)8についても、図1に示した固定ばね部材(押圧部材)6と同様に、図12におけるような板ばね構造の他に、第一の屈曲部61及び第二の屈曲部65に、第一の板状部63と第二の板状部82とを連結する蝶番構造及び第一の板状部63と固定部64とを連結する蝶番構造を形成し、当該蝶番構造に弾性部材(コイルばねなど)を設けることにより付勢させることができる。第二の板状部82の前部82d及び後部82cについては、第三の屈曲部82bが第1の実施例における第三の屈曲部62bと比較して大きいため、上記蝶番構造により付勢させてもよい。   The fixed spring member (pressing member) 8 shown in FIG. 12 also has a first bent portion in addition to the plate spring structure as shown in FIG. 12, similarly to the fixed spring member (pressing member) 6 shown in FIG. A hinge structure for connecting the first plate-like portion 63 and the second plate-like portion 82 to the 61 and the second bent portion 65 and a hinge structure for connecting the first plate-like portion 63 and the fixing portion 64 to each other. It can be formed and biased by providing the hinge structure with an elastic member (coil spring or the like). The front part 82d and the rear part 82c of the second plate-like part 82 are biased by the hinge structure because the third bent part 82b is larger than the third bent part 62b in the first embodiment. May be.

固定ばね部材(押圧部材)6と固定ばね部材(押圧部材)8のいずれを用いるのかは、押圧する伝達部材の特性などに応じて適宜選択することができる。   Which of the fixed spring member (pressing member) 6 and the fixed spring member (pressing member) 8 is used can be appropriately selected according to the characteristics of the transmitting member to be pressed.

以上、第1の実施例及び第2の実施例においては、上述の色分離合成光学系(ライトバルブユニット)を用いたが、本発明はこれらの実施形態に限定されず、その要旨の範囲内で種々の変形及び変更が可能である。例えば、各色のライトバルブの位置、各光学素子の配置、数に関しては、色分離合成光学系(ライトバルブユニット)としての要旨の範囲で変更可能である。   As described above, in the first and second examples, the above-described color separation / synthesis optical system (light valve unit) is used, but the present invention is not limited to these embodiments, and is within the scope of the gist thereof. Various modifications and changes are possible. For example, the position of each color light valve and the arrangement and number of optical elements can be changed within the scope of the gist of the color separation / synthesis optical system (light valve unit).

6,8 固定ばね部材(押圧部材)
61 第一の屈曲部
62,82 第二の板状部
62a,82a 前部
62b,82b 第三の屈曲部
62c,82c 後部
62d,82d 第一の延設部
63 第一の板状部
64 固定部
65 第二の屈曲部
6,8 Fixed spring member (pressing member)
61 First bent portion 62, 82 Second plate-like portion 62a, 82a Front portion 62b, 82b Third bent portion 62c, 82c Rear portion 62d, 82d First extending portion 63 First plate-like portion 64 fixed Part 65 second bent part

Claims (6)

第一の板状部と、
前記第一の板状部の相対する側にそれぞれ形成された第二の板状部及び固定部と、
前記第一の板状部と前記第二の板状部の間に形成された第一の屈曲部と、
前記第一の板状部と前記固定部の間に形成された第二の屈曲部と、を有する押圧部材であって、
前記第二の板状部は、前記第一の屈曲部に隣接する後部、及び、前記後部の前記第一の屈曲部と相対する側に隣接する前部を有し、
前記前部は、前記後部に向かって延在する複数の第一の延設部を有し、
前記第二の板状部は、前記複数の第一の延設部の少なくとも一つと前記後部とを連結する第三の屈曲部を有し、
前記第一の屈曲部の屈曲方向と、前記第二の屈曲部及び前記第三の屈曲部の屈曲方向が、互いに異なる方向であり、
前記第一の板状部及び前記第二の板状部は、互いに同じ回転方向に付勢されていることを特徴とする押圧部材。
A first plate-like portion;
A second plate-like portion and a fixing portion respectively formed on opposite sides of the first plate-like portion;
A first bent portion formed between the first plate-like portion and the second plate-like portion;
A pressing member having a second bent portion formed between the first plate-like portion and the fixing portion,
The second plate-like portion has a rear portion adjacent to the first bent portion, and a front portion adjacent to a side of the rear portion facing the first bent portion,
The front portion has a plurality of first extending portions extending toward the rear portion,
The second plate-like portion has a third bent portion that connects at least one of the plurality of first extending portions and the rear portion,
The bending direction of the first bending part and the bending direction of the second bending part and the third bending part are different from each other;
The pressing member, wherein the first plate-like portion and the second plate-like portion are biased in the same rotational direction.
前記第一の板状部の両端部から前記第一の板状部の外側に向かって延在する複数の第二の延設部を有することを特徴とする請求項1に記載の押圧部材。   2. The pressing member according to claim 1, comprising a plurality of second extending portions extending from both end portions of the first plate-like portion toward the outside of the first plate-like portion. 前記押圧部材が板ばねであることを特徴とする請求項1又は2に記載の押圧部材。   The pressing member according to claim 1, wherein the pressing member is a leaf spring. 前記第一の屈曲部及び前記第二の屈曲部はそれぞれ、前記第一の板状部と前記第二の板状部及び前記第一の板状部と前記固定部を連結する蝶番構造を有し、前記蝶番構造に設けられた弾性部材により、前記第一の板状部及び前記第二の板状部は付勢されていることを特徴とする請求項1又は2に記載の押圧部材。   Each of the first bent portion and the second bent portion has a hinge structure that connects the first plate-like portion, the second plate-like portion, the first plate-like portion, and the fixing portion. The pressing member according to claim 1, wherein the first plate-like portion and the second plate-like portion are urged by an elastic member provided in the hinge structure. 光源と、
前記光源から出射された光束を変調するライトバルブと、前記ライトバルブに接触するヒートシンクと、前記ヒートシンクに接触する伝達部材と、を有するライトバルブユニットと、
前記ライトバルブを電気的に駆動する基板と、
前記基板を保持する基板保持部材と、を有し、
前記ライトバルブユニットと前記基板の間に前記基板保持部材が配置された画像投射装置であって、
前記基板保持部材が請求項1乃至4のいずれかに記載の押圧部材を有し、
前記押圧部材の前記固定部が前記基板保持部材に固定され、
前記押圧部材の前記第一の延設部により前記伝達部材が前記基板保持部材に押圧されていることを特徴とする画像投射装置。
A light source;
A light valve unit that includes a light valve that modulates a light beam emitted from the light source, a heat sink that contacts the light valve, and a transmission member that contacts the heat sink;
A substrate for electrically driving the light valve;
A substrate holding member for holding the substrate,
An image projection apparatus in which the substrate holding member is disposed between the light valve unit and the substrate,
The substrate holding member has the pressing member according to any one of claims 1 to 4,
The fixing portion of the pressing member is fixed to the substrate holding member;
The image projection apparatus, wherein the transmission member is pressed against the substrate holding member by the first extending portion of the pressing member.
前記伝達部材がグラファイト又は銅からなることを特徴とする請求項5に記載の画像投射装置。   6. The image projection apparatus according to claim 5, wherein the transmission member is made of graphite or copper.
JP2011146518A 2011-06-30 2011-06-30 Pressing member and image projection device using the same Withdrawn JP2013015582A (en)

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