JP3169603B2 - Multi-screen projector - Google Patents

Multi-screen projector

Info

Publication number
JP3169603B2
JP3169603B2 JP32888490A JP32888490A JP3169603B2 JP 3169603 B2 JP3169603 B2 JP 3169603B2 JP 32888490 A JP32888490 A JP 32888490A JP 32888490 A JP32888490 A JP 32888490A JP 3169603 B2 JP3169603 B2 JP 3169603B2
Authority
JP
Japan
Prior art keywords
screen
sheets
projector
gap
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP32888490A
Other languages
Japanese (ja)
Other versions
JPH04204484A (en
Inventor
幸明 岩原
正規 荻野
益昌 太田
幸浩 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP32888490A priority Critical patent/JP3169603B2/en
Publication of JPH04204484A publication Critical patent/JPH04204484A/en
Application granted granted Critical
Publication of JP3169603B2 publication Critical patent/JP3169603B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE:To execute the shielding or the semi-transmission of the leakage of light projected from a projector and to make a gap between screens inconspicuous by inserting a band-like light shielding member in a gap along the almost central side of total four sheets and shielding the projected light leaked from the gap between the sheets. CONSTITUTION:The fine band-like light shielding member 15 is inserted in the central small gap where total four sheets of two-layered sheets 2 and 3 and the adjacent two-layered sheets 12 and 13 are closely brought into contact one another. Due to that, the gap between the end surfaces of the respective sheets 2, 3, 12 and 13 constituting a multi-screen and the adjacent sheets need not be buried by the light shielding member extending over the whole surface. As the result, since the expansion of the respective sheets 2, 3, 12 and 13 can be executed almost without resistance, the screen is not expanded and the light shielding member is not swollen. Besides, a fine view is not spoiled, optical performance is not deteriorated and the gap between the screens is made inconspicuous. Thus, the gap between the sheets constituting the multi-screen is made inconspicuous.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION 【産業上の利用分野】[Industrial applications]

本発明は、マルチスクリーンプロジェクタにおいて、
マルチスクリーンを構成するシート間の隙間からもれて
出る投写光のしゃ光手段に関する。
The present invention relates to a multi-screen projector,
The present invention relates to a means for blocking projection light leaking from a gap between sheets forming a multi-screen.

【従来の技術】[Prior art]

従来の技術は特開平1−134491号公報に記載のように
保持板を枠体に取付け、該保持板にスクリーンを保持
し、かつ保持板及びスクリーン部材が隣接する空隙部に
弾性部材を有し、弾性部材としてシリコーンゴムを充填
している。又、保持板の膨張はシリコーンゴムの弾性的
性質で吸収している。 又、保持板はスクリーンと膨張係数が同じとし、保持
板とスクリーンはネジ部材で締付けている。
In the prior art, a holding plate is attached to a frame body as described in JP-A-1-144991, a screen is held by the holding plate, and the holding plate and the screen member have an elastic member in an adjacent space. Silicone rubber is filled as an elastic member. The expansion of the holding plate is absorbed by the elastic properties of the silicone rubber. The holding plate has the same expansion coefficient as the screen, and the holding plate and the screen are fastened with a screw member.

【発明が解決しようとする課題】[Problems to be solved by the invention]

上記従来技術例の第13図に示すように保持板22,23が
スクリーン20,21に比べ極く厚い場合、一般的に温度変
化においては膨張係数が同じならばほぼ同時に伸縮す
る。しかし湿度変化においては、うすいスクリーンは吸
湿によって短期間で伸縮するが、厚い保持板は厚さの中
心まで吸湿するのに長期間かかる為、伸縮は長い周期で
行われる。この結果伸縮に時差が発生する。仮に従来例
に示す第13図のうすいスクン20,21が吸湿によって早く
伸びた場合は、うすいスクリーン20,21と保持板22,23は
各々ネジ部材24で締付けているため、うすいスクリーン
20,21は膨張が妨げられ反るかふくれるという問題があ
る。 又、上記従来技術の実施例では、保持板とスクリーン
の長さを交差なく切断することは困難で、たとえ膨張係
数が同じでもスクリーンがわずかに小さく切断された場
合においては第11図の説明図のように光線9はもれて出
る。又、仮に第11図の説明図のように補強板14とシート
12,13がネジ締めされていない時、うすいフロントシー
ト12が乾燥によって早く縮んだ場合は、光線9はもれて
出るという問題があった。 又、前述の従来技術において第13図に示すように隣接
する保持板をくの字形に配置し、かつ隣接した保持板間
及びスクリーン間にシリコーンゴムを充填したとき、ゴ
ムの圧縮分は、同図のようにほとんどが後方へ飛び出し
て吸収される。しかし、仮に第12図の説明図で示すよう
に保持板を横一直線に並べた場合で考えると、圧縮され
たシリコーンゴム19は同図のようにスクリーンの前方に
もはみ出してしまい、美観や光学性能を損なうという問
題が発生する。又、隣接する保持板間、又はスクリーン
部材間の隙間を極く狭く(2mm以下)するには、保持板
とスクリーン部材が吸湿によって膨張して伸びたとき、
充填するシリコーンゴムを極めて柔らかくしないと、前
記膨張が妨げられ、スクリーン部材は反るか、ふくれる
ことになる。この極く狭い隙間で、前記膨張を吸収でき
る軟らかなシリコーンゴムの入手は難かしい。又、極く
狭い隙間にシリコーンゴムを注入して充填することは極
めて困難で、作業性が悪いという問題があった。このた
め、実用に当たってはスクリーン部材間隔は約10mmと広
い幅が必要となり、高性能のマルチスクリーンに適した
手段ではない。以上のような問題点は、従来技術の応用
では解決が困難である。 本発明の目的は以上のようにスクリーンの膨張を大き
く妨げることなく、又、美観や光学性能を損うことな
く、プロジェクタからの投射光のもれをしゃ光又は半透
過させ、スクリーン間の隙間を目立たなくすることにあ
る。
As shown in FIG. 13 of the prior art example, when the holding plates 22 and 23 are extremely thicker than the screens 20 and 21, they generally expand and contract almost at the same temperature change when the expansion coefficients are the same. However, in a change in humidity, a thin screen expands and contracts in a short period of time due to moisture absorption. However, since a thick holding plate takes a long time to absorb moisture to the center of the thickness, expansion and contraction are performed in a long cycle. As a result, a time difference occurs in expansion and contraction. If the thin screens 20, 21 shown in FIG. 13 shown in the prior art shown in FIG. 13 extend quickly due to moisture absorption, the thin screens 20, 21 and the holding plates 22, 23 are fastened by the screw members 24, respectively.
20,21 has a problem that expansion is hindered and warps. Further, in the embodiment of the prior art described above, it is difficult to cut the holding plate and the screen without crossing the length, and even if the screen is cut slightly smaller even if the expansion coefficient is the same, the explanatory diagram of FIG. Ray 9 leaks out as shown in FIG. Also, as shown in the explanatory view of FIG.
When the thin front sheet 12 shrinks quickly due to drying when the screws 12 and 13 are not tightened, there is a problem that the light rays 9 leak out. In addition, when the adjacent holding plates are arranged in a dogleg shape as shown in FIG. 13 and silicone rubber is filled between the adjacent holding plates and between the screens as shown in FIG. As shown in the figure, most of them jump back and are absorbed. However, assuming that the holding plates are arranged in a horizontal line as shown in the explanatory view of FIG. 12, the compressed silicone rubber 19 protrudes to the front of the screen as shown in FIG. A problem of impairing performance occurs. Also, in order to make the gap between the adjacent holding plates or the screen member extremely narrow (2 mm or less), when the holding plate and the screen member expand and expand due to moisture absorption,
If the silicone rubber to be filled is not very soft, the expansion will be hindered and the screen member will warp or bulge. It is difficult to obtain a soft silicone rubber capable of absorbing the expansion in the extremely narrow gap. Further, it is extremely difficult to inject and fill silicone rubber into a very narrow gap, and there is a problem that workability is poor. For this reason, in practical use, the screen member interval needs to be as wide as about 10 mm, which is not a means suitable for a high-performance multi-screen. The above problems are difficult to solve by application of the prior art. The object of the present invention is to block or semi-transmit the leakage of the projection light from the projector without significantly hindering the expansion of the screen as described above, and without impairing the aesthetics and optical performance, and to provide a gap between the screens. Is to make it less noticeable.

【課題を解決するための手段】[Means for Solving the Problems]

本発明は上記目的を達成するために、少なくとも2層
以上のシートから成るスクリーン手段と、線材とバネを
用いて前記2層以上のシートが密着せしめるような張力
を付与させて成る取付手段とを備えたマルチスクリーン
において、前記2層のシートと隣り合ったスクリーンの
2層のシートの合計4枚が近接した中心の小さな隙間に
細いひも状しゃ光部材を挿入したものである。 又、本発明の他の手段として、隣合ったスクリーン間
の隙間より極めて薄い板状部材を挿入又は、スクリーン
を構成する前記シートに接着又は粘着させてはさみ込ん
だものである。 又、本発明の他の手段として、マルチスクリーンを構
成するシートの少なくとも左右辺に沿った出射側の角を
ほぼ45゜に細長く面取し、かつ少なくとも該面取面を粗
面にするか、塗装を行ったものである。又、他の手段と
して、前記の出射側の角の面(出射面あるいは側面)も
細長く塗装するか、テープをはる、又は粗面に加工した
ものである。 又、本発明の他の手段として、出射側のシートを他の
シートより予め少し長くしたものである。
In order to achieve the above object, the present invention provides a screen means comprising at least two or more layers of sheets, and an attaching means comprising applying a tension such that the sheets of two or more layers are brought into close contact with each other using a wire and a spring. In the multi-screen provided, a total of four sheets of the two-layer sheet and the two-layer sheet of the adjacent screen have thin string-like light blocking members inserted into a small gap at the center. Further, as another means of the present invention, a plate-like member extremely thinner than a gap between adjacent screens is inserted, or is inserted or adhered to the sheet constituting the screen. Further, as another means of the present invention, at least the exit side corner along the left and right sides of the sheet constituting the multi-screen is chamfered to be approximately 45 °, and at least the chamfered surface is roughened, Painted. Further, as another means, the above-mentioned emission-side corner surface (emission surface or side surface) is also elongated or painted, taped, or processed into a rough surface. Further, as another means of the present invention, the sheet on the emission side is made slightly longer in advance than the other sheets.

【作用】[Action]

以上の手段によってマルチスクリーンを構成する各シ
ートは、隣のシートとの端面間を全面に渡ってしゃ光部
材で埋めることがなくなる。この結果、前記各シートの
膨張はほぼ抵抗なく行うことができるため、前記スクリ
ーンのふくれや、しゃ光部材の盛り上がり等がなく、美
観を損ねたり、光学性能を劣化させることがなくなり、
スクリーン間の隙間は目立たなくなる。
With the above-described means, each sheet constituting the multi-screen does not fill the entire surface between the end faces with the adjacent sheet with the light blocking member. As a result, since the expansion of each sheet can be performed with almost no resistance, there is no bulging of the screen, no swelling of the light blocking member, etc., and it does not impair the aesthetic appearance or degrade the optical performance,
The gap between the screens is less noticeable.

【実施例】【Example】

以下本発明の実施例を第1図、第2図、第3図、第4
図、第5図、第6図、第7図、第8図、第9図で説明す
る。 同図に示す引用符号において 1はマルチスクリーンプロジェクタの単位投写レンズ
を示す。 2はプロジェクタからの投写光を水平方向に拡散する
ブラックストライプ付のレンチキュラーレンズからなる
フロントシートを示す。3はフレネルレンズからなるフ
レネルシートを示す。4は前記フロントシート1及びフ
レネルシート2の補強を行うために重ね合わせた透明な
プラスチック製の補強シートを示す。5は投写光を隣り
のスクリーンに投写しないように設けた一般のしゃ光板
を示す。又12,13,14は前記各シート2,3,4に対応した隣
のシートを示す。6は隣接したスクリーンの補強シート
4,14を連結固定する連結金具を示す。7,8はフロントシ
ート2とフレネルシート3を補強シート4側に重なるよ
うに引き付ける線材とバネを示す。9はプロジェクタか
らの投写光、10は投写の半透過光線を示す。又、15,16,
17,18は本発明のしゃ光手段を示す。 第1図は本発明の一実施例の外観図を示す。同図で示
すように、隣のスクリーンへ投射光が入らないようにす
る一般のしゃ光板5を補強板4,14の上下にネジ止めし
て、しゃ光板5を取付ける。補強板4,14上には、フレネ
ルシート3,13、フロントシート2,12を左右及び密着する
方向にバネ7と線材8で張力を与えて取付ける。又、補
強板4,14は架台上部に吊るす、吊るし機構にはレールを
設け補強板4,14が伸縮した時、左右に可動できるように
する。 同図において隣接した補強シート4,14間は連結金具6
で連結固定しているため、温湿度変化があってもシート
4,14の間隔は一定である。一方シート2,3,12,13は温度
変化では補強シート4,14とほぼ時差なく伸縮するが、湿
度変化においては、厚さや、材質が異なるため、伸縮に
時差が発生する。この結果、シート2,3とシート12,13間
は膨張する分を予じめ見込んで間隔をあけている。例え
ば、50″のスクリーンにおいては膨張率差が湿度10%変
動当り300ppmであった場合、湿度変化が70%±30%にお
いては約±1mm伸縮する。この為、第10図や第11図で示
すように投写光9がフロントシート2の周辺部から前記
した約1mmの隙間を通ってもれ出してしまう。そこで本
発明の一実施例においては直径約2mm程度の細いひも状
しゃ光部材15をロントシート2,12とフレネルシート3,13
との間の中央にできた隙間の空間にシートの辺に沿って
挿入する。 第2図は本発明の一実施例における細いひも状しゃ光
部材15を通す位置の部分拡大図を示す。 同図に示す細いひも状しゃ光部材15はフロントシート
2,12やフレネルシート3,13が膨張したとき、なるべく抵
抗をなくしたいため柔らかい弾性材が適している。例え
ばシリコーン製のチューブや、ゴムひも等が良い。しか
し、スクリーン間の隙間や形状によっては硬いひも状の
棒の方がなじみ易い場合もある。又、色は黒、又は灰色
かフロントシート2,12と同色で半透明の素材を使用する
となじみ易い。同図中10は半透過した光線をしめす。半
透明にするとフロントシート2,12の間のつなぎ目が目立
たなくなる。本実施例の細いひも状しゃ光部材15は第1
図で示すように上下に引き出し、固定又は弱いバネ等で
引張って支持すると安定して保持できる。 本発明によると、前述のシート2,12,3,13が膨張して
も細いひも状しゃ光部材15はその体積が小さい為フロン
トシート2,12の隙間からはみ出ることはない。 第3図は本発明の他の実施例の外観図を示す。同図に
おいて、16は本発明による薄いシート状のしゃ光板で、
フロントシート2,フレネルシート3の側面に取り付け
る。プロジェクタの投写レンズ1から出射した投写光9
はフレネルシート3の周辺部を透過して出射するが、フ
ロントシート2の側面に配した不透明のしゃ光板16によ
ってしゃ断することができる。しゃ光板16は黒又は灰色
が、フロントシート2と同色で半透明の材料を使用する
と違和感がなくなじみ易くスクリーン間の隙間が目立た
なくなる。同図中10は半透過した光線を示す。 第4図は本発明の一実施例で薄いシート状のしゃ光板
16を取り付けた位置の部分拡大図で、代表的な形状を示
す。同図に示すようにしゃ光板16はシート2,12,3,13間
の隙間に比べて極うすいもの(マイラーシート等)を扱
う。又、しゃ光板16はシート2,12,3,13,4,14等の側面又
はブラックストライプ上等に接着又は粘着して取り付け
るか、又は同図のようにしゃ光板16を湾曲させてシート
2,12間に圧入すると落下しなくなる。ひも状しゃ光部材
の形状の他の例を第7図の(イ)(ロ)(ハ)(ニ)に
示す。同図(イ)はシリコーン等のチューブ、(ロ)は
チューブにひだを設け、補助板等に付着して位置出しす
る。(ハ)は被覆付のゴムひも、(ニ)は被覆付ゴムひ
もにテープをつけて補強板等に粘着して位置出しする。
しゃ光板の形状の他の例を第8図で(イ)(ロ)(ハ)
(ニ)に示す。 第5図は本発明の他の実施例の部分拡大図を示す。同
図に示すようにマルチスクリーンを構成するシート3,1
3,4,14等少なくとも一対のシートの出射側の角を辺に沿
って斜めに面取し、該面取部を塗装することによってシ
ート上にしゃ光部17を形成し、この結果、スクリーン間
からもれ出るプロジェクタからの投写光9をしゃ光する
ことができる。又、この面取面を粗面に加工し、投写光
9を半透過させるとフロントシート2,12間の隙間が目立
たなくなる。10は半透過した光線を示す。 第6図は本発明の他の実施例の部分拡大図を示す。同
図で示すように前述の出射側の角の面(出射面あるいは
側面)を辺に沿って細長く塗装するか、又はテープをは
るか、あるいは粗面に加工することによってシート上に
しゃ光部18を形成しこの結果スクリーン間からもれて出
るプロジェクタからの出射光9をしゃ光又は半透過させ
ることができる。 第9図は本発明の他の実施例を示す。同図のように、
フロントシート2は他のシートより早く縮んだときでも
他のシートより長くなるように予め切断する。この結果
投射光9はフロントシート2に当たり拡散する為、投射
光は直接もれてでなくなる。以上で述べた実施例におい
て、ひも状しゃ光部材15は前記の通り直径約2mm程度で
ある。従って第2図で示す通り、隣接するスクリーン部
材間(2−12間,3−13間,)の間隔は2mm以下とするこ
とができる。又、薄いシート状のしゃ光板16は第4図,
第5図,第6図で示す通り極薄いため、隣接する前記ス
クリーン部材間の間隔は前述したスクリーンの伸縮量の
約1mm程度まで狭くすることができる。
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, and 4.
This will be described with reference to FIG. 5, FIG. 5, FIG. 6, FIG. 7, FIG. In the reference numerals shown in FIG. 1, 1 indicates a unit projection lens of the multi-screen projector. Reference numeral 2 denotes a front sheet including a lenticular lens with a black stripe that diffuses the projection light from the projector in the horizontal direction. Reference numeral 3 denotes a Fresnel sheet made of a Fresnel lens. Reference numeral 4 denotes a transparent plastic reinforcing sheet that is superposed to reinforce the front sheet 1 and the Fresnel sheet 2. Reference numeral 5 denotes a general light blocking plate provided so as not to project the projection light onto an adjacent screen. Reference numerals 12, 13, and 14 indicate adjacent sheets corresponding to the sheets 2, 3, and 4, respectively. 6 is a reinforcing sheet for the adjacent screen
4 shows a connecting bracket for connecting and fixing 4, 14; Reference numerals 7 and 8 denote wires and springs for pulling the front sheet 2 and the Fresnel sheet 3 so as to overlap the reinforcing sheet 4 side. Reference numeral 9 denotes projection light from the projector, and reference numeral 10 denotes a semi-transmitted light beam of the projection. Also, 15,16,
Reference numerals 17 and 18 denote light shielding means of the present invention. FIG. 1 is an external view of one embodiment of the present invention. As shown in the figure, a general light blocking plate 5 for preventing projection light from entering an adjacent screen is screwed above and below the reinforcing plates 4 and 14, and the light blocking plate 5 is mounted. On the reinforcing plates 4 and 14, the Fresnel sheets 3 and 13 and the front sheets 2 and 12 are attached by applying tension to the right and left and in the direction in which they are in close contact with the spring 7 and the wire 8. The reinforcing plates 4 and 14 are suspended above the gantry. A rail is provided in the suspension mechanism so that the reinforcing plates 4 and 14 can be moved left and right when the reinforcing plates 4 and 14 expand and contract. In the same figure, a connecting metal fitting 6 is provided between adjacent reinforcing sheets 4 and 14.
The sheet is connected and fixed even when temperature and humidity change.
The intervals of 4,14 are constant. On the other hand, the sheets 2, 3, 12, and 13 expand and contract with almost no time difference with the reinforcing sheets 4 and 14 when the temperature changes, but there is a time difference in expansion and contraction when the humidity changes because the thickness and the material are different. As a result, there is a space between the sheets 2 and 3 and the sheets 12 and 13 in anticipation of expansion. For example, in the case of a 50 ″ screen, if the difference in expansion rate is 300 ppm per 10% change in humidity, it expands and contracts by approximately ± 1 mm when the change in humidity is 70% ± 30%. For this reason, FIG. 10 and FIG. As shown, the projection light 9 leaks from the peripheral portion of the front sheet 2 through the above-described gap of about 1 mm, and in one embodiment of the present invention, a thin string-shaped light blocking member 15 having a diameter of about 2 mm is provided. The Front sheet 2,12 and Fresnel sheet 3,13
And along the side of the sheet into the space in the center created between them. FIG. 2 is a partially enlarged view showing a position where a thin string-shaped light blocking member 15 passes through in one embodiment of the present invention. The thin string-shaped light blocking member 15 shown in FIG.
A soft elastic material is suitable for reducing the resistance as much as possible when the 2,12 and the Fresnel sheets 3,13 expand. For example, a tube made of silicone or a rubber cord is preferable. However, depending on the gap and the shape between the screens, there is a case where the hard string-like rod is more easily adapted. In addition, if the color is black or gray or the same color as the front sheets 2 and 12 and a translucent material is used, it is easy to adapt. In the figure, reference numeral 10 denotes a semi-transmitted light beam. If it is made translucent, the seam between the front seats 2 and 12 becomes inconspicuous. The thin string-shaped light blocking member 15 of this embodiment is the first type.
As shown in the figure, when pulled up and down, fixed or pulled and supported by a weak spring or the like, stable holding can be achieved. According to the present invention, even when the above-mentioned sheets 2, 12, 3, 13 expand, the thin string-shaped light blocking member 15 does not protrude from the gap between the front sheets 2, 12 because of its small volume. FIG. 3 shows an external view of another embodiment of the present invention. In the figure, reference numeral 16 denotes a thin sheet-shaped light shielding plate according to the present invention,
It is attached to the side of the front sheet 2 and the Fresnel sheet 3. Projection light 9 emitted from projection lens 1 of the projector
Are transmitted through the peripheral portion of the Fresnel sheet 3 and emitted, but can be cut off by an opaque light blocking plate 16 disposed on the side surface of the front sheet 2. The light blocking plate 16 is black or gray, but if a translucent material of the same color as the front sheet 2 is used, it is easy to adapt without a sense of incongruity and the gap between the screens is inconspicuous. In the figure, reference numeral 10 denotes a semi-transmitted light beam. FIG. 4 shows a thin sheet-shaped light shielding plate according to an embodiment of the present invention.
A representative enlarged view of a portion where 16 is attached is shown. As shown in the figure, the light shielding plate 16 handles an object (Mylar sheet or the like) that is extremely thin compared to the gap between the sheets 2, 12, 3, and 13. The light shielding plate 16 is attached or adhered to the side surface of the sheets 2, 12, 3, 13, 4, 14 or the like or on a black stripe, or the light shielding plate 16 is bent as shown in FIG.
When it is pressed between 2 and 12, it will not drop. Other examples of the shape of the cord-shaped light blocking member are shown in FIGS. 7 (a), (b), (c) and (d). FIG. 2A shows a tube made of silicone or the like, and FIG. 2B shows a fold formed on the tube, which is attached to an auxiliary plate or the like and positioned. (C) is a rubber band with a coating, and (D) is a tape with a rubber band with a coating, which is adhered to a reinforcing plate or the like for positioning.
Another example of the shape of the shutter plate is shown in FIGS.
(D). FIG. 5 is a partially enlarged view of another embodiment of the present invention. Sheets 3 and 1 that compose the multi-screen as shown in FIG.
3, 4, 14, etc., at least a pair of sheets are chamfered obliquely on the emission side along the side, and the light-shielding portion 17 is formed on the sheet by painting the chamfered portion. The projection light 9 from the projector that leaks out can be blocked. Further, if the chamfered surface is processed into a rough surface and the projection light 9 is partially transmitted, the gap between the front sheets 2 and 12 becomes inconspicuous. Numeral 10 indicates a semi-transmitted light beam. FIG. 6 shows a partially enlarged view of another embodiment of the present invention. As shown in the figure, the light emitting portion 18 is coated on the sheet by coating the above-mentioned emission side surface (emission surface or side surface) elongated along the side, or by processing the tape to a far or rough surface. As a result, the light 9 emitted from the projector leaking from between the screens can be blocked or semi-transmitted. FIG. 9 shows another embodiment of the present invention. As shown in the figure,
Even when the front sheet 2 shrinks faster than other sheets, it is cut in advance so as to be longer than the other sheets. As a result, the projection light 9 hits the front sheet 2 and diffuses, so that the projection light is not directly leaked. In the embodiment described above, the string-shaped light blocking member 15 has a diameter of about 2 mm as described above. Therefore, as shown in FIG. 2, the distance between adjacent screen members (between 2-12 and between 3-13) can be made 2 mm or less. Also, the thin sheet-shaped light blocking plate 16 is shown in FIG.
As shown in FIGS. 5 and 6, the distance between the adjacent screen members can be reduced to about 1 mm of the above-described expansion and contraction amount of the screen, because the screen is extremely thin.

【発明の効果】【The invention's effect】

本発明は以上で説明したように構成されるので、スク
リーンがふくれたり、しゃ光部材がスクリーンの表面に
はみ出して美観を損ねたり、光学性能を劣化させること
なく、投写光のもれをしゃ光することができる。又、本
発明によると、マルチスクリーンを構成する隣接したス
クリーン間の幅を広げることなく、しゃ光できるため、
シート間の隙間を目立たなくすることができ、かつ、ス
クリーンを構成する2層以上のシート間へのゴムやホコ
リの侵入も側面のしゃ光部材で阻止でき、高い効果を得
ることができる。
Since the present invention is configured as described above, the screen does not bulge, the light blocking member protrudes to the surface of the screen to impair the aesthetic appearance, and does not impair the optical performance. can do. Also, according to the present invention, light can be shielded without increasing the width between adjacent screens constituting a multi-screen,
The gap between the sheets can be made inconspicuous, and the intrusion of rubber or dust between two or more sheets constituting the screen can be prevented by the light shielding member on the side surface, and a high effect can be obtained.

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

第1図、第2図は、本発明の一実施例で細いひも状のし
ゃ光部材を取り付けた外観図及び部分拡大図である。第
3図、第4図は、本発明の他の実施例で、薄いシート状
のしゃ光板を取り付けた外観図及び部分拡大図である。
第5図、第6図は、本発明の他の実施例でスクリーンを
構成するシートの出射側の角を加工した部分拡大図であ
る。第7図は、第1図及び第2図に示す本発明のひも状
しゃ光部材の他の形状例である。第8図は、第3図、第
4図に示す本発明の薄いシート状のしゃ光板の他の形状
例である。第9図は、本発明の他の実施例を示す部分拡
大図である。第10、第11図は、光もれを説明する部分拡
大図である。第12図は、部分拡大説明図である。第13図
は、しゃ光部の従来例を示す図である。 2……フロントシート 3……フレネルシート 9……投写光 15……細いひも状のしゃ光部材 16……うすいシート状のしゃ光板 17,18……シート上のしゃ光部
FIG. 1 and FIG. 2 are an external view and a partially enlarged view in which a thin string-shaped light blocking member is attached according to an embodiment of the present invention. FIGS. 3 and 4 are an external view and a partially enlarged view of another embodiment of the present invention, in which a thin sheet-shaped light blocking plate is attached.
FIG. 5 and FIG. 6 are partially enlarged views in which the corners on the exit side of the sheet constituting the screen are processed in another embodiment of the present invention. FIG. 7 shows another example of the shape of the cord-shaped light blocking member of the present invention shown in FIGS. 1 and 2. FIG. 8 shows another example of the shape of the thin sheet-shaped light blocking plate of the present invention shown in FIGS. 3 and 4. FIG. 9 is a partially enlarged view showing another embodiment of the present invention. 10 and 11 are partially enlarged views for explaining light leakage. FIG. 12 is a partially enlarged explanatory view. FIG. 13 is a diagram showing a conventional example of a light shielding unit. 2 Front sheet 3 Fresnel sheet 9 Projection light 15 Thin string-shaped light blocking member 16 Thin sheet-shaped light blocking plate 17, 18 Light blocking portion on sheet

フロントページの続き (72)発明者 太田 益昌 神奈川県横浜市戸塚区吉田町292番地 株式会社日立製作所情報映像工場部内 (72)発明者 小林 幸浩 神奈川県横浜市戸塚区吉田町292番地 日立ビデオエンジニアリング株式会社内 (56)参考文献 特開 平3−73938(JP,A) 実開 昭63−4535(JP,U) 実開 平1−101247(JP,U) 実開 昭64−3836(JP,U) 実開 昭60−161339(JP,U) 実開 昭62−6733(JP,U) (58)調査した分野(Int.Cl.7,DB名) G09F 9/00 H04N 5/74 G03B 21/60 Continued on the front page (72) Inventor Masumasa Ota 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Information and Video Factory, Hitachi, Ltd. (72) Inventor Yukihiro Kobayashi 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi Video Engineering (56) References JP-A-3-73938 (JP, A) JP-A 63-4535 (JP, U) JP-A 1-1101247 (JP, U) JP-A 64-3836 (JP, A) U) Shokai 60-161339 (JP, U) Shokai 62-6733 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G09F 9/00 H04N 5/74 G03B 21 / 60

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】n,mを少なくともその一方が2以上の整数
であり他方が任意の整数であるとして、水平方向にm
列、垂直方向にn行の合計、nm個のマトリクス状に配置
された単位プロジェクタ手段と、 透過形で少なくともnm個のマトリクス状に配置された単
位フレネルシートと、水平方向に光を拡散するレンチキ
ュラーレンズからなるm列またはnm個のマトリクス状に
配置された単位フロントシートとを、少なくとも重ね合
わせた2層以上のシートを有するスクリーン手段と、 少なくとも前記フロントシートの左右辺又は周辺を複数
の線材とバネを用いて前記2層以上のシートが密着せし
めるような張力を付与して成る取付手段とを備えたマル
チスクリーンプロジェクタにおいて、 隣接する前記スクリーン手段間の間隙にひも状のしゃ光
部材を挿入して前記スクリーン手段間から漏れる前記プ
ロジェクタの投写光をしゃ光することを特徴とするマル
チスクリーンプロジェクタ。
(1) Assuming that at least one of n and m is an integer of 2 or more and the other is an arbitrary integer,
A total of n columns in the vertical direction, a total of n rows, unit projector means arranged in a matrix of nm, a transmission type of at least nm unit fresnel sheets arranged in a matrix, and a lenticular for diffusing light in the horizontal direction Screen means having at least two or more layers of unit front sheets arranged in a matrix of m rows or nm of lenses, and a plurality of wires at least on the left and right sides or around the front sheet. A multi-screen projector comprising: a mounting means for applying tension so that the two or more sheets are brought into close contact with each other using a spring. A string-shaped light blocking member is inserted into a gap between adjacent screen means. A projection light of the projector leaking from between the screen means. Lean projector.
【請求項2】n,mを少なくともその一方が2以上の整数
であり他方が任意の整数であるとして、水平方向にm
列、垂直方向にn行の合計、nm個のマトリクス状に配置
された単位プロジェクタ手段と、 透過形で少なくともnm個のマトリクス状に配置された単
位フレネルシートと、水平方向に光を拡散するレンチキ
ュラーレンズからなるm列またはnm個のマトリクス状に
配置された単位フロントシートとを、少なくとも重ね合
わせた2層以上のシートを有するスクリーン手段と、 少なくとも前記フロントシートの左右辺又は周辺を複数
の線材とバネを用いて前記2層以上のシートが密着せし
めるような張力を付与して成る取付手段とを備えたマル
チスクリーンプロジェクタにおいて、 隣接する前記スクリーン手段間の間隙に板状のしゃ光部
材を挿入して、前記スクリーンの周辺からもれて出る前
記プロジェクタの投写光をしゃ光することを特徴とする
マルチスクリーンプロジェクタ。
(2) Assuming that at least one of n and m is an integer of 2 or more and the other is an arbitrary integer,
A total of n columns in the vertical direction, a total of n rows, unit projector means arranged in a matrix of nm, a transmission type of at least nm unit fresnel sheets arranged in a matrix, and a lenticular for diffusing light in the horizontal direction Screen means having at least two or more layers of unit front sheets arranged in a matrix of m rows or nm of lenses, and a plurality of wires at least on the left and right sides or around the front sheet. A multi-screen projector comprising: a mounting means for applying a tension so that the two or more layers of sheets are brought into close contact with each other using a spring. A plate-shaped light shielding member is inserted into a gap between the adjacent screen means. And blocking the projection light of the projector leaking from the periphery of the screen. Screen projector.
【請求項3】請求項1、2において、前記しゃ光部材を
半透明にすることによって、前記プロジェクタの投写光
のもれを半透過させたことを特徴とするマルチスクリー
ンプロジェクタ。
3. The multi-screen projector according to claim 1, wherein said light blocking member is made semi-transparent, so that leakage of projection light of said projector is made semi-transparent.
【請求項4】請求項1において、前記ひも状のしゃ光部
材としてチューブを用いたことを特徴とするマルチスク
リーンプロジェクタ。
4. The multi-screen projector according to claim 1, wherein a tube is used as said string-shaped light blocking member.
JP32888490A 1990-11-30 1990-11-30 Multi-screen projector Expired - Fee Related JP3169603B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32888490A JP3169603B2 (en) 1990-11-30 1990-11-30 Multi-screen projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32888490A JP3169603B2 (en) 1990-11-30 1990-11-30 Multi-screen projector

Publications (2)

Publication Number Publication Date
JPH04204484A JPH04204484A (en) 1992-07-24
JP3169603B2 true JP3169603B2 (en) 2001-05-28

Family

ID=18215172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32888490A Expired - Fee Related JP3169603B2 (en) 1990-11-30 1990-11-30 Multi-screen projector

Country Status (1)

Country Link
JP (1) JP3169603B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9785045B2 (en) 2013-09-23 2017-10-10 Barco Nv Seamless projection screen for fast installation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2988792B2 (en) * 1992-10-21 1999-12-13 株式会社日立製作所 Combination type projection display device and its assembling method
US6657698B1 (en) * 1999-08-06 2003-12-02 Rainbow Displays, Inc. Design features optimized for tiled flat-panel displays

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9785045B2 (en) 2013-09-23 2017-10-10 Barco Nv Seamless projection screen for fast installation

Also Published As

Publication number Publication date
JPH04204484A (en) 1992-07-24

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