JP2002341288A - Projection device - Google Patents
Projection deviceInfo
- Publication number
- JP2002341288A JP2002341288A JP2001144564A JP2001144564A JP2002341288A JP 2002341288 A JP2002341288 A JP 2002341288A JP 2001144564 A JP2001144564 A JP 2001144564A JP 2001144564 A JP2001144564 A JP 2001144564A JP 2002341288 A JP2002341288 A JP 2002341288A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- plate
- light
- projection
- optical system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、投写装置に関し、
特に投写光学系を反射鏡を用いて構成した投写装置の遮
光構造に関する。The present invention relates to a projection device,
In particular, the present invention relates to a light shielding structure of a projection device in which a projection optical system is configured using a reflecting mirror.
【０００２】[0002]
【従来の技術】テレビ受像機やパソコン等の情報機器の
モニター、その他の各種表示装置用の表示デバイスとし
て液晶表示素子が多く用いられている。その中でも近
年、液晶表示素子を投写装置の作像手段として用いたも
のが小型でかつ大画面表示を可能とした表示装置として
利用されている。2. Description of the Related Art Liquid crystal display elements are widely used as monitors for information devices such as television receivers and personal computers, and as display devices for various other display devices. Among them, in recent years, a device using a liquid crystal display element as an image forming means of a projection device has been used as a small display device capable of displaying a large screen.
【０００３】図４は従来の液晶プロジェクタの一例を説
明する模式図であって、図４（ａ）は外観図、（ｂ）は
光学系を示す概略図である。図4において、液晶プロジ
ェクタは筺体３１の内部に光源装置（照明光源）３３、
液晶表示素子３４、その他の結像光学系を収納し、筺体
３１の一側面に結像光学系３５を取り付けてある。光源
装置３３から放射された照明光は液晶表示素子３４に入
射し、この液晶表示素子３４に生成した画像で照明光を
変調して、これを結像光学系３５で拡大し、スクリーン
３２上に投写し大画面を再生する。なお、ここで使用さ
れている液晶表示素子３４は透過型である。FIG. 4 is a schematic view for explaining an example of a conventional liquid crystal projector. FIG. 4A is an external view, and FIG. 4B is a schematic view showing an optical system. In FIG. 4, a liquid crystal projector includes a light source device (illumination light source) 33 inside a housing 31,
A liquid crystal display element 34 and other imaging optical systems are housed, and an imaging optical system 35 is attached to one side surface of the housing 31. The illumination light emitted from the light source device 33 is incident on a liquid crystal display element 34, modulates the illumination light with an image generated on the liquid crystal display element 34, magnifies the modulated light with an imaging optical system 35, Project and play a large screen. Note that the liquid crystal display element 34 used here is of a transmission type.
【０００４】このような従来の液晶プロジェクタでは、
液晶表示素子３４に生成した画像をスクリーン３２上に
結像させるように、光源装置３３、液晶表示素子３４、
結像光学系３５等の構成要素の位置が決められて筺体３
１内に固定されている。筺体３１からの光（投射光）の
出口は結像光学系３５であるが、この結像光学系３５は
レンズ等による屈折光学素子で構成されて筺体３１に固
定されており、結像光学系３５内で各屈折光学素子の外
形精度を維持し、また焦点位置調節機構も結像光学系の
一部分を動かすことのみで行うようになっている。In such a conventional liquid crystal projector,
The light source device 33, the liquid crystal display element 34, and the light source device 33 form an image formed on the liquid crystal display element 34 on the screen 32.
The position of components such as the imaging optical system 35 is determined and the housing 3
It is fixed in 1. An exit of light (projection light) from the housing 31 is an imaging optical system 35. The imaging optical system 35 is configured by a refractive optical element such as a lens and is fixed to the housing 31. The outer shape accuracy of each refractive optical element is maintained within 35, and the focus position adjusting mechanism is also operated by only moving a part of the imaging optical system.
【０００５】また、特開平１１−１２５８６５号公報な
どに開示されている図5に示す結像光学系４３のように
反射光学素子で光学系が構成されている装置は、偏芯光
学系となり各反射光学素子の配置（間隔）誤差及び角度
誤差が画像劣化を引き起こし、また迷光の予測が困難で
あるため、結像光学系４３を構成する全ての反射光学素
子を１つの筐体４１に配置する一体構造としているが、
焦点調節を１つの反射鏡の移動で行うために、その光学
素子を保持する部材があり、反射鏡とそれらを保持する
部材及び筐体４１の精度を高め、さらに調整を必要とす
るものであった。なお、４２は光源装置、４４は液晶表
示素子である。[0005] Further, an apparatus having an optical system composed of a reflective optical element, such as an imaging optical system 43 shown in FIG. 5 disclosed in Japanese Patent Application Laid-Open No. H11-125865, becomes an eccentric optical system, and Since the arrangement (interval) error and the angle error of the reflection optical elements cause image degradation and it is difficult to predict stray light, all the reflection optical elements constituting the imaging optical system 43 are arranged in one housing 41. Although it has an integral structure,
In order to perform focus adjustment by moving a single reflecting mirror, there is a member that holds the optical element, and the accuracy of the reflecting mirror, the member that holds them, and the housing 41 is increased, and further adjustment is required. Was. In addition, 42 is a light source device, and 44 is a liquid crystal display element.
【０００６】このような従来技術の問題点を解消するた
め、本発明者は特願２０００−２４０１６４号におい
て、図６に示すように投写光学系を構成する光学素子を
すべて反射鏡５１、５２、５３、５４により構成し、全
ての反射鏡５１〜５４の相対位置関係を固定して反射鏡
５１〜５４を板状筐体５６に設置し、反射鏡５１〜５４
の相対位置関係を固定したまま板状筐体５６を移動させ
て画像形成素子５５に対する投写光学系５０全体の位置
を調整するようにした投写装置を提案した。In order to solve such a problem of the prior art, the present inventor disclosed in Japanese Patent Application No. 2000-240164 all the optical elements constituting the projection optical system as shown in FIG. The reflecting mirrors 51 to 54 are fixed to the plate-like casing 56 while fixing the relative positional relationship of all the reflecting mirrors 51 to 54, and the reflecting mirrors 51 to 54
A projection device has been proposed in which the plate-like housing 56 is moved while the relative positional relationship is fixed to adjust the position of the entire projection optical system 50 with respect to the image forming element 55.
【０００７】[0007]
【発明が解決しようとする課題】しかし、特願２０００
−２４０１６４号の投写光学系は、構成要素である反射
鏡がすべて剥き出し状態で板状筐体に相対位置関係を維
持するように固定されているため、外部光線、フレア光
線、反射鏡を固定している板状筐体の表面からの乱反射
光線などが反射鏡に入ってきてが画質を劣化させるとい
う問題がある。また、最終出射開口部が開かれたのもに
なっているので保管時などにゴミが混入するという問題
もある。SUMMARY OF THE INVENTION However, Japanese Patent Application 2000
In the projection optical system of No.-240164, since all the reflecting mirrors as components are fixed to the plate-shaped housing so as to maintain the relative positional relationship in an exposed state, the external light, the flare light, and the reflecting mirror are fixed. However, there is a problem that the image quality is deteriorated when diffusely reflected light from the surface of the plate-like housing enters the reflecting mirror. Further, since the final emission opening is also opened, there is a problem that dust is mixed in during storage or the like.
【０００８】本発明の目的は、上記従来技術の諸問題を
解消し、反射光学素子を用いた小型かつ組み立てや調整
不要な筐体構造をもち、不必要な光線を除去して画質の
劣化のない投写装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to have a small-sized housing structure using a reflective optical element and to eliminate the need for assembly and adjustment, and to eliminate unnecessary light rays to reduce image quality deterioration. There is not to provide a projection device.
【０００９】[0009]
【課題を解決するための手段】本発明によれば、画像形
成素子と、この画像形成素子からの光をスクリーンに投
射する投写光学系とを有し、前記投写光学系を構成する
光学素子をすべて反射鏡で構成し、前記すべての反射鏡
の相対位置関係を固定して筐体に設置し、前記筐体を移
動させて前記画像形成素子に対する前記投写光学系全体
の位置を調節可能にした投写装置において、前記筐体
は、板状部とこれを囲う側壁部から形成され、前記反射
鏡は、前記板状部と側壁部に取付けられている投写装置
が得られる。前記筐体は、樹脂あるいは金属で一体成形
して作られているか、または板状部と側壁部を別部品で
つくり、これらを一体に組み立て作られている。筐体の
板状部には光を通過させる開口部が設けられており、ま
た側壁部には光をスクリーンに向けて出射させる出射開
口部が設けられている。出射開口部には、扉または蓋が
設けられている。また、前記筐体の内面側には、艶消し
黒塗装を施すか、あるいは細かな凹凸がつけられて、筐
体内面からの光の反射を防止する構成とされている。According to the present invention, there is provided an image forming device, and a projection optical system for projecting light from the image forming device onto a screen. All of the reflecting mirrors were installed in a housing with the relative positional relationship of all the reflecting mirrors fixed, and the housing was moved to adjust the position of the entire projection optical system with respect to the image forming element. In the projection device, the housing is formed of a plate-shaped portion and a side wall surrounding the plate-shaped portion, and the reflection mirror is a projection device attached to the plate-shaped portion and the side wall. The housing is made of resin or metal by integral molding, or the plate portion and the side wall portion are made of separate parts, and these are integrally assembled. An opening for transmitting light is provided in a plate-like portion of the housing, and an emission opening for emitting light toward the screen is provided on a side wall portion. The exit opening is provided with a door or a lid. The inner surface of the housing is coated with a matte black paint or has fine irregularities to prevent light from being reflected from the inner surface of the housing.
【００１０】前記投写光学系は３個以上の反射鏡で構成
されている。本発明では説明のため反射鏡は４枚構成と
する。第１の反射鏡は板状部の下側で前記画像形成素子
の前方の側壁部に固定され、第２の反射鏡は板状部に設
けられている開口部に固定され、第３の反射鏡および第
４の反射鏡は板状部の上側で相対向するように側壁部に
固定されている。The projection optical system includes three or more reflecting mirrors. In the present invention, for the sake of explanation, the number of reflecting mirrors is four. The first reflecting mirror is fixed to the front side wall of the image forming element below the plate-like portion, the second reflecting mirror is fixed to an opening provided in the plate-like portion, and the third reflecting mirror is fixed to the opening. The mirror and the fourth reflecting mirror are fixed to the side wall so as to face each other on the upper side of the plate-like portion.
【００１１】また、本発明によれば、光源装置と画像形
成素子、照明光学系及び画像形成素子からの光をスクリ
ーンに投影する投写光学系で構成される投写装置におい
て、投写光学系を構成する光学素子を全て反射鏡を用い
て構成し、反射鏡を全て一つの筐体に配置し、反射鏡の
間隔を精度よく保持したまま移動可能にするとともに、
反射鏡を取り付けた筐体には、有効光束を囲うような個
所に壁あるいは穴を設けることによって迷光を遮光する
ことが可能となるようにした投写装置が得られる。Further, according to the present invention, a projection optical system is configured in a projection apparatus including a light source device, an image forming element, an illumination optical system, and a projection optical system for projecting light from the image forming element onto a screen. All the optical elements are configured using reflecting mirrors, all the reflecting mirrors are arranged in one housing, and it is possible to move while maintaining the spacing of the reflecting mirrors accurately,
A projection device in which stray light can be shielded by providing a wall or a hole at a location surrounding the effective light beam is provided in the housing to which the reflecting mirror is attached.
【００１２】[0012]
【発明の実施の形態】次に本発明について図面を参照し
て説明する。図１は本発明の第１の実施形態を示す断面
図であり、図２はその分解斜視図である。図１を参照す
ると、本発明に係る投写装置は、例えば液晶表示素子な
どからなる画像形成素子５と、この画像形成素子５から
の光をスクリーン（図示せず）に拡大して投写する投写
光学系１０とを有している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. Referring to FIG. 1, a projection apparatus according to the present invention includes an image forming element 5 including, for example, a liquid crystal display element, and a projection optics that enlarges and projects light from the image forming element 5 onto a screen (not shown). System 10.
【００１３】投写光学系１０は、図１に示すように反射
鏡１，２，３，４からなり、これら反射鏡１〜４の相対
位置間隔、角度公差を所定の値に設定し筐体６に固定し
て構成されている。画像形成素子５からの光は、破線で
示すように反射鏡１、反射鏡２、反射鏡３および反射鏡
４で順次反射され、筐体６の出射開口部８から投写光７
としてスクリーンに向けて出射する。焦点調節は、反射
鏡１〜４の相対位置間隔、角度公差を保持した状態で固
定された筐体６を一体として画像形成素子５に対して前
後に移動することによって行われる。本実施の形態で
は、反射鏡１〜４はそれらの相対位置間隔・角度公差を
保持した状態で筐体６に取り付けられているので、焦点
調整時に反射鏡相互間の配置や角度に誤差を生じること
はない。The projection optical system 10 comprises reflecting mirrors 1, 2, 3, and 4, as shown in FIG. It is configured to be fixed. The light from the image forming element 5 is sequentially reflected by the reflecting mirror 1, the reflecting mirror 2, the reflecting mirror 3, and the reflecting mirror 4 as shown by a broken line, and projected light 7 from the exit opening 8 of the housing 6.
And emitted toward the screen. Focus adjustment is performed by integrally moving the fixed housing 6 while maintaining the relative position intervals and angle tolerances of the reflecting mirrors 1 to 4 to and fro with respect to the image forming element 5. In the present embodiment, since the reflecting mirrors 1 to 4 are attached to the housing 6 while maintaining their relative position intervals and angle tolerances, errors occur in the arrangement and angles between the reflecting mirrors during focus adjustment. Never.
【００１４】図１および図１に示した投写装置の分解斜
視図である図２から分かるように、筐体６は、樹脂ある
いは金属を一体成形して作られ板状部６ａとその回りを
囲む側壁部６ｂとを有している。反射鏡１は筐体６の板
状部６ａの裏面側で画像形成素子５の前方位置の側壁部
に固定され、反射鏡３，４は板状部６ａの表面側の側壁
部に相対向するように固定されている。また、反射鏡２
は筐体６の板状部６ａを上下に貫通する開口部９に設置
されている。As can be seen from FIG. 1 and FIG. 2 which is an exploded perspective view of the projection apparatus shown in FIG. 1, the housing 6 is formed by integrally molding resin or metal, and surrounds the plate-shaped portion 6a and its periphery. And a side wall 6b. The reflecting mirror 1 is fixed to the side wall of the front surface of the image forming element 5 on the back side of the plate-shaped portion 6a of the housing 6, and the reflecting mirrors 3 and 4 face the side wall of the plate-shaped portion 6a on the front side. So that it is fixed. Also, the reflecting mirror 2
Is installed in an opening 9 vertically penetrating the plate-shaped portion 6 a of the housing 6.
【００１５】図２の分解斜視図に示すように、一体成形
された樹脂製の筐体６は、水平方向光軸を中心に２分割
されている。これは反射鏡の取付けを容易にするためで
あり、上記したように板状部６ａおよび側壁部６ｂに反
射鏡１〜４を取り付けた後、2分割された筐体は組み立
てられて一体構造の筐体にされる。さらに、筐体６の内
面側に艶消し黒塗装を施したり、細かな凹凸をつけ内面
反射や外乱光を抑えている。また、出射開口部８には扉
や蓋６ｃを取付けて保管時にゴミが混入することを防ぐ
ようにしている。As shown in an exploded perspective view of FIG. 2, the integrally formed resin housing 6 is divided into two around a horizontal optical axis. This is for facilitating the attachment of the reflecting mirror. After attaching the reflecting mirrors 1 to 4 to the plate portion 6a and the side wall portion 6b as described above, the two divided housings are assembled to form an integrated structure. It is made into a housing. Further, a matte black coating is applied to the inner surface side of the housing 6 or fine irregularities are provided to suppress internal reflection and disturbance light. Further, a door or a lid 6c is attached to the emission opening 8 to prevent dust from entering during storage.
【００１６】このように本実施の形態の筐体６は、板状
部と側壁部を有し、反射鏡１〜４を包囲し有効光線を囲
うように構成されているので外乱光線やフレア光線など
が反射鏡に入らなくなり、簡単な構造で画質の向上を図
ることができる。As described above, the housing 6 of the present embodiment has the plate-like portion and the side wall portion and is configured to surround the reflecting mirrors 1 to 4 and surround the effective light beam. And the like do not enter the reflecting mirror, and the image quality can be improved with a simple structure.
【００１７】次に本実施の形態の投写装置の動作につい
て図1を参照して説明する。筐体６の板状部６ａの下方
に配設した画像形成素子５からの光線は、その前方位置
の筐体の板状部下側の側壁部６ｂに固定された反射鏡１
により板状部６ａの開口部９に配設された反射鏡２に向
けて反射される。反射鏡2で反射された光線は、開口部
９を通過して板状部６ａの表面側に出射し、表面側の側
壁部に固定された反射鏡３で反射され、同じく表面側の
側壁部に相対向するように取付けられている反射鏡４に
入射し反射される。この反射鏡４からの反射光は筐体６
の出射開口部８から投写光７として出射しスクリーン
（図示しない）に投写される。また、必要に応じて画像
形成素子５の近傍の光路に開口を有する遮光板１１を取
り付けることにより、迷光を除去し有効光線のみを通す
ことができる。また、板状部に設けられているの開口部
９を必要最小の口径にすることによって、迷光や外乱光
線を除くことができる。Next, the operation of the projection apparatus according to the present embodiment will be described with reference to FIG. Light rays from the image forming element 5 disposed below the plate-shaped portion 6a of the housing 6 are reflected by the reflecting mirror 1 fixed to the side wall 6b below the plate-shaped portion of the housing at the front position.
Thus, the light is reflected toward the reflecting mirror 2 provided in the opening 9 of the plate-shaped portion 6a. The light beam reflected by the reflecting mirror 2 passes through the opening 9 and exits to the surface side of the plate-shaped portion 6a, and is reflected by the reflecting mirror 3 fixed to the side wall portion on the front side, and similarly the side wall portion on the surface side. The light is incident on and reflected by the reflecting mirror 4 mounted so as to face the surface. The reflected light from the reflecting mirror 4 is
The light exits from the exit opening 8 as projection light 7 and is projected on a screen (not shown). In addition, by attaching a light-shielding plate 11 having an opening in an optical path near the image forming element 5 as needed, stray light can be removed and only effective light can pass. In addition, stray light and disturbance light can be eliminated by making the opening 9 provided in the plate-shaped portion the minimum required diameter.
【００１８】このように本実施の形態では、投写光学系
を構成するすべての反射鏡１〜４を１枚の板状部とその
回りの側壁部とから成る筐体6に固定して一体構造とす
ることによって各反射鏡間の配置誤差をなくし、各反射
鏡から反射される光線の必要な光線だけを精度よく通過
させる部材を配置できる。レンズで言うところの鏡筒に
相当することが可能となる。筐体の内壁面に艶消し黒塗
装を施したり、細かな凹凸をつけることで、反射光線を
抑えることができる.また筐体と反射鏡とを一つの構造
体として移動することで投写光学系全体と連動して動く
ことができるので、焦点位置調整を行っても光線を妨げ
ることは無い。また壁面を意図的に狭くすることによっ
て光線を絞ることができ、スクリーンに投影される明る
さを調整することができる。開口部を最小にすることが
可能になるのでごみ等の異物混入や付着を最小限に抑え
ることができ、また不用意に反射鏡表面を触ることがで
きないので表面の汚れを抑えられる。これにより投写光
学系に反射鏡を用いる投写装置の画像劣化の要因として
の、迷光の除去に対しても有効光線を妨げることなく遮
光板を配置できる構造が達成できる。As described above, in the present embodiment, all the reflecting mirrors 1 to 4 constituting the projection optical system are fixed to the housing 6 composed of one plate-shaped portion and the surrounding side wall portion, thereby forming an integral structure. By doing so, it is possible to eliminate an arrangement error between the respective reflecting mirrors, and to arrange a member that allows only necessary light beams reflected from the respective reflecting mirrors to pass with high accuracy. It is possible to correspond to a lens barrel in terms of a lens. By applying a matte black paint on the inner wall of the housing or adding fine irregularities, reflected light can be suppressed, and the housing and reflecting mirror can be moved as a single structure to project the projection optical system. Since it can move in conjunction with the whole, even if the focus position is adjusted, it does not disturb the light beam. Further, by intentionally narrowing the wall surface, the light beam can be narrowed, and the brightness projected on the screen can be adjusted. Since the opening can be minimized, foreign matter such as dust can be minimized, and contamination of the surface of the reflecting mirror can be suppressed because the surface of the reflecting mirror cannot be touched carelessly. As a result, it is possible to achieve a structure in which a light shielding plate can be arranged without obstructing an effective light beam even when removing stray light, which is a cause of image deterioration of a projection device using a reflecting mirror in the projection optical system.
【００１９】次に本発明の第２の実施形態について説明
する。図３は、本発明の第２の実施形態を示す断面図で
ある。この実施の形態が第１の実施の形態と異なるとこ
ろは、筐体の板状部と側壁部を別部品で形成し、後で一
体に組立てている点である。すなわち、筐体６を構成す
る板状部６ａと側壁部６ｄ，６ｅ，６ｆとを別部品で形
成し、また板状部６ａの開口部９の口径を制限するため
に板状部に取りつける制限部材６ｇ、６ｈも別部品で形
成し、後で板状部６ａに側壁部６ｄ，６ｅ，６ｆおよび
制限部材６ｇ、６ｈを取り付けて一体化し筐体を構成し
ている。また、筐体の内壁面には、第１の実施形態と同
様に艶消し黒塗装を施したり、細かな凹凸をつけ、反射
光線を押さえるようにしている。Next, a second embodiment of the present invention will be described. FIG. 3 is a sectional view showing a second embodiment of the present invention. This embodiment is different from the first embodiment in that the plate-like portion and the side wall portion of the housing are formed as separate components and are later assembled integrally. That is, the plate-shaped portion 6a and the side walls 6d, 6e, 6f constituting the housing 6 are formed as separate parts, and the restriction attached to the plate-shaped portion to restrict the diameter of the opening 9 of the plate-shaped portion 6a. The members 6g and 6h are also formed as separate parts, and the side walls 6d, 6e and 6f and the limiting members 6g and 6h are later attached to the plate-like portion 6a to form a housing. In addition, the inner wall surface of the housing is coated with matte black paint or has fine irregularities as in the first embodiment so as to suppress reflected light.
【００２０】この第２の実施形態の動作も第１の実施の
形態の動作と同じように、画像形成素子５からの光線
は、側壁部６ｄに固定された反射鏡１で反射され、板状
部６ａの開口部９に取り付けられている反射鏡２に入射
し反射される。反射鏡２で反射された光線は開口部９を
通り板状部６ａの表面側へ出射し、側壁部６ｅに固定さ
れた反射鏡３で反射され、側壁部６ｆに相対向して固定
された反射鏡４で反射され出射開口部８から投写光７と
して出射しスクリーン（図示しない）に投写される。In the operation of the second embodiment, similarly to the operation of the first embodiment, the light beam from the image forming element 5 is reflected by the reflecting mirror 1 fixed to the side wall 6d, and is formed in a plate shape. The light enters and is reflected by the reflecting mirror 2 attached to the opening 9 of the portion 6a. The light beam reflected by the reflecting mirror 2 passes through the opening 9 and exits toward the surface of the plate-like portion 6a, is reflected by the reflecting mirror 3 fixed to the side wall 6e, and is fixed opposite to the side wall 6f. The light is reflected by the reflecting mirror 4, emitted from the emission opening 8 as projection light 7, and projected on a screen (not shown).
【００２１】この第２の実施形態のように、筐体の板状
部と側壁部を別部品として形成した場合、反射鏡をそれ
ぞれ別部品として形成した側壁部に固定した後、板状部
に取付できるので製造組立作業が容易になるという利点
がある。また、板状部の開口部をあらかじめ適当な大き
さに作っておき、後で制限部材を取り付けて開口部の口
径を制御できるので、この場合も製作が容易になる。こ
の外、この第２の実施の形態においても反射鏡相互位置
の間隔は筐体に固定されて一定であり、また有効光線は
側壁部によって囲まれているので上記第１の実施形態で
説明したのと同じ効果を有することは当然である。When the plate portion and the side wall portion of the housing are formed as separate components as in the second embodiment, the reflecting mirror is fixed to the side wall portion formed as a separate component, and then the plate mirror is fixed to the plate portion. There is an advantage that the manufacturing and assembling work is facilitated because it can be attached. In addition, since the opening of the plate-shaped portion is formed in an appropriate size in advance, and the diameter of the opening can be controlled by attaching a restricting member later, manufacturing is also easy in this case. In addition, also in the second embodiment, the distance between the reflecting mirrors is fixed to the housing and is constant, and the effective light beam is surrounded by the side wall, so that it is described in the first embodiment. Of course, it has the same effect as
【００２２】[0022]
【発明の効果】以上説明したように、本発明によれば、
投写光学系を構成するすべての反射鏡を１枚の板状部と
その回りの側壁部とから成る筐体に固定して一体構造と
することによって各反射鏡間の配置誤差をなくし、各反
射鏡から反射される光線の必要な光線だけを精度よく通
過させるようにした投写装置が得られる。すなわち、１
つの構造体にすべての光学素子を配置し、遮光壁を設け
ることによって、有効光線を覆う壁と有効光線の距離を
一定に保つことが可能となり、焦点調整を行ってもその
状態を保つことが可能となる。また、筐体の内壁面に
は、艶消し黒塗装を施したり、細かな凹凸をつけいるの
で、反射光線を抑えることができる.本発明では、筐体
と反射鏡とを一つの構造体として移動することで投写光
学系全体と連動して動くことができるので、焦点位置調
整を行っても光線を妨げることは無い。また壁面を意図
的に狭くすることによって光線を絞ることができ、スク
リーンに投影される明るさを調整することができる。開
口部を最小にすることが可能になるのでごみ等の異物混
入や付着を最小限に抑えることができ、また不用意に反
射鏡表面を触ることができないので表面の汚れを抑えら
れる。これにより投写光学系に反射鏡を用いる投写装置
の画像劣化の要因としての、迷光の除去に対しても有効
光線を妨げることなく遮光板を配置できる構造が達成で
きるなどの効果がある。As described above, according to the present invention,
All of the reflecting mirrors constituting the projection optical system are fixed to a housing composed of a single plate-like portion and a side wall portion therearound to form an integral structure, thereby eliminating an arrangement error between the reflecting mirrors and allowing each reflection. A projection device is obtained in which only necessary rays of light reflected from the mirror are passed with high accuracy. That is, 1
By arranging all optical elements in one structure and providing a light shielding wall, the distance between the wall covering the effective light beam and the effective light beam can be kept constant, and that state can be maintained even after focus adjustment. It becomes possible. In addition, since the inner wall surface of the housing is coated with matte black paint or has fine irregularities, it is possible to suppress reflected light rays. By moving, it can move in conjunction with the entire projection optical system, so that even if the focus position is adjusted, it does not obstruct the light beam. Further, by intentionally narrowing the wall surface, the light beam can be narrowed, and the brightness projected on the screen can be adjusted. Since the opening can be minimized, it is possible to minimize the entry and adhesion of foreign matter such as dust, and the surface of the reflecting mirror can be prevented from being stained because the surface of the reflecting mirror cannot be touched carelessly. As a result, there is an effect that a structure in which a light-shielding plate can be arranged without obstructing effective light rays even when removing stray light, which is a factor of image deterioration of a projection device using a reflecting mirror in the projection optical system, can be achieved.
【図１】本発明の第１の実施形態を示す投写装置の断面
図である。FIG. 1 is a sectional view of a projection device according to a first embodiment of the present invention.
【図２】本発明の第１の実施形態を示す投写装置の分解
斜視図である。FIG. 2 is an exploded perspective view of the projection device according to the first embodiment of the present invention.
【図３】本発明の第２の実施形態を示す投写装置の断面
図である。FIG. 3 is a cross-sectional view of a projection device according to a second embodiment of the present invention.
【図４】（ａ）、（ｂ）はそれぞれ従来の投写装置の外
観図と光学系の構成図である。FIGS. 4A and 4B are an external view of a conventional projection device and a configuration diagram of an optical system, respectively.
【図５】従来の投写装置の他の例を示す構成図である。FIG. 5 is a configuration diagram showing another example of a conventional projection device.
【図６】特願２０００−２４０１６４号において本発明
者が提案した投写装置の断面図である。FIG. 6 is a cross-sectional view of a projection device proposed by the present inventors in Japanese Patent Application No. 2000-240164.
１，２，３，４、５１，５２，５３，５４ 反射鏡 ５、５５ 画像形成素子 ６、３１，４１ 筐体 ６ａ 板状部 ６ｂ，６ｄ，６ｅ，６ｆ 側壁部 ６ｃ 蓋 ７、５７ 投写光 ８ 出射開口部 ９ 開口部 １０、５０ 投写光学系 １１，５９ 遮光板 ３２ スクリーン ３３，４２光源装置 ３４，４４ 液晶表示素子 ３５，４３ 結像光学系 ５６ 板状筐体 1, 2, 3, 4, 51, 52, 53, 54 Reflecting mirror 5, 55 Image forming element 6, 31, 41 Housing 6a Plate 6b, 6d, 6e, 6f Side wall 6c Cover 7, 57 Projection light Reference Signs List 8 exit opening 9 opening 10, 50 projection optical system 11, 59 light shielding plate 32 screen 33, 42 light source device 34, 44 liquid crystal display element 35, 43 imaging optical system 56 plate-shaped housing
Claims (8)
の光をスクリーンに投射する投写光学系とを有し、前記
投写社光学系を構成する光学素子をすべて反射鏡で構成
し、前記すべての反射鏡の相対位置関係を固定して筐体
に設置し、前記筐体を移動させて前記画像形成素子に対
する前記投写光学系全体の位置を調節可能にした投写装
置において、前記筐体は、板状部とこれを囲う側壁部か
ら形成され、前記反射鏡は、前記板状部と側壁部に取付
けられていることを特徴とする投写装置。An image forming element, and a projection optical system for projecting light from the image forming element onto a screen, wherein all the optical elements constituting the optical system of the projection company are constituted by reflecting mirrors. In a projection device in which the relative positional relationship of the reflecting mirrors is fixed and installed in a housing, and the housing is moved to adjust the position of the entire projection optical system with respect to the image forming element, the housing is A projection device comprising a plate portion and a side wall portion surrounding the plate portion, wherein the reflecting mirror is attached to the plate portion and the side wall portion.
して作られていることを特徴とする請求項1記載の投写
装置。2. The projection device according to claim 1, wherein the housing is formed integrally with resin or metal.
を別部品で製作し、後で組み立てることを特徴とする請
求項１記載の投写装置。3. The projection device according to claim 1, wherein the housing is formed by separately forming a plate-shaped portion and a side wall portion surrounding the plate-shaped portion, and assembled later.
口部が設けられており、側壁部には光をスクリーンに向
けて出射させる出射開口部が設けられていることを特徴
とする請求項1〜３のいずれかに記載の投写装置。4. A plate-like portion of the housing is provided with an opening through which light passes, and an exit opening through which light is emitted toward a screen is provided on a side wall portion. The projection device according to claim 1.
が設けられていることを特徴とする請求項４記載の投写
装置。5. The projection device according to claim 4, wherein a door or a lid is provided at the emission opening of the housing.
施されていることを特徴とする請求項１〜５のいずれか
に記載の投写装置。6. The projection device according to claim 1, wherein a matte black coating is applied to an inner surface of the housing.
けられていることを特徴とする請求項１〜５のいずれか
に記載の投写装置。7. The projection device according to claim 1, wherein fine irregularities are provided on an inner surface side of the housing.
第１の反射鏡は板状部の下側で前記画像形成素子の前方
の側壁部に固定され、第２の反射鏡は板状部に設けられ
ている開口部に固定され、第３の反射鏡および第４の反
射鏡は板状部の上側で相対向するように側壁部に固定さ
れていることを特徴とする請求項1記載の投写装置。8. The projection optical system has four reflecting mirrors,
The first reflecting mirror is fixed to the front side wall of the image forming element below the plate-like portion, the second reflecting mirror is fixed to an opening provided in the plate-like portion, and the third reflecting mirror is fixed to the opening. 2. The projection device according to claim 1, wherein the mirror and the fourth reflecting mirror are fixed to the side wall so as to face each other above the plate-like portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001144564A JP2002341288A (en) | 2001-05-15 | 2001-05-15 | Projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001144564A JP2002341288A (en) | 2001-05-15 | 2001-05-15 | Projection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002341288A true JP2002341288A (en) | 2002-11-27 |
Family
ID=18990490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001144564A Pending JP2002341288A (en) | 2001-05-15 | 2001-05-15 | Projection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002341288A (en) |
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|---|---|---|---|---|
| JP2008107801A (en) * | 2006-09-29 | 2008-05-08 | Sanyo Electric Co Ltd | Projection image display device and system |
| JP2009237370A (en) * | 2008-03-27 | 2009-10-15 | Sanyo Electric Co Ltd | Projection video display device |
| JP2009237371A (en) * | 2008-03-27 | 2009-10-15 | Sanyo Electric Co Ltd | Projection type video display device |
| JP2009237369A (en) * | 2008-03-27 | 2009-10-15 | Sanyo Electric Co Ltd | Projection video display device |
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| JP2009300934A (en) * | 2008-06-17 | 2009-12-24 | Seiko Epson Corp | Projector apparatus |
| US7854515B2 (en) | 2005-04-01 | 2010-12-21 | Konica Minolta Opto, Inc. | Projection type image display apparatus |
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|---|---|---|---|---|
| US7854515B2 (en) | 2005-04-01 | 2010-12-21 | Konica Minolta Opto, Inc. | Projection type image display apparatus |
| JP2008107801A (en) * | 2006-09-29 | 2008-05-08 | Sanyo Electric Co Ltd | Projection image display device and system |
| JP2009276790A (en) * | 2006-09-29 | 2009-11-26 | Sanyo Electric Co Ltd | Projection type video display device |
| JP2009276789A (en) * | 2006-09-29 | 2009-11-26 | Sanyo Electric Co Ltd | Projection type video display device |
| US8702247B2 (en) | 2006-09-29 | 2014-04-22 | Sanyo Electric Co., Ltd. | Projection-type image display device and projection-type image display system |
| US8002419B2 (en) | 2006-09-29 | 2011-08-23 | Sanyo Electric Co., Ltd. | Projection-type image display device and projection-type image display system |
| JP2014029549A (en) * | 2006-12-04 | 2014-02-13 | Ricoh Co Ltd | Image projection device |
| JP2015166879A (en) * | 2006-12-04 | 2015-09-24 | 株式会社リコー | Image projection device and projection optical system |
| JP2015072500A (en) * | 2006-12-04 | 2015-04-16 | 株式会社リコー | Image projection device |
| JP2014044444A (en) * | 2006-12-04 | 2014-03-13 | Ricoh Co Ltd | Projection optical system |
| JP2009237369A (en) * | 2008-03-27 | 2009-10-15 | Sanyo Electric Co Ltd | Projection video display device |
| JP2009237371A (en) * | 2008-03-27 | 2009-10-15 | Sanyo Electric Co Ltd | Projection type video display device |
| JP2009237370A (en) * | 2008-03-27 | 2009-10-15 | Sanyo Electric Co Ltd | Projection video display device |
| JP4557051B2 (en) * | 2008-06-17 | 2010-10-06 | セイコーエプソン株式会社 | projector |
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