JPH04147125A - Light projection device with reflecting mirror - Google Patents
Light projection device with reflecting mirrorInfo
- Publication number
- JPH04147125A JPH04147125A JP2271586A JP27158690A JPH04147125A JP H04147125 A JPH04147125 A JP H04147125A JP 2271586 A JP2271586 A JP 2271586A JP 27158690 A JP27158690 A JP 27158690A JP H04147125 A JPH04147125 A JP H04147125A
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- light
- projection device
- transmission body
- light transmission
- 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
- 229910001507 metal halide Inorganic materials 0.000 abstract description 14
- 150000005309 metal halides Chemical class 0.000 abstract description 14
- 239000000853 adhesive Substances 0.000 abstract description 12
- 230000001070 adhesive effect Effects 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 9
- 239000011521 glass Substances 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 6
- 238000010348 incorporation Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- -1 rare earth metal iodide Chemical class 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- GPWHDDKQSYOYBF-UHFFFAOYSA-N ac1l2u0q Chemical compound Br[Br-]Br GPWHDDKQSYOYBF-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- GBLDKMKYYYAAKD-UHFFFAOYSA-K dysprosium(3+);tribromide Chemical compound [Br-].[Br-].[Br-].[Dy+3] GBLDKMKYYYAAKD-UHFFFAOYSA-K 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- MZNSYJWLQLXLHE-UHFFFAOYSA-K holmium(3+);tribromide Chemical compound Br[Ho](Br)Br MZNSYJWLQLXLHE-UHFFFAOYSA-K 0.000 description 1
- KXCRAPCRWWGWIW-UHFFFAOYSA-K holmium(3+);triiodide Chemical compound I[Ho](I)I KXCRAPCRWWGWIW-UHFFFAOYSA-K 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Projection Apparatus (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、例えばメタルハライドランプ等を光源とし、
プロジェクタ装置などのような画像投影装置に適用され
る反射鏡付投光装置に関する。[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention uses a metal halide lamp or the like as a light source, for example,
The present invention relates to a light projection device with a reflecting mirror applied to an image projection device such as a projector device.
（従来の技術）
例えば文字、図形等の画像を拡大して表示面に投影する
手段として、映写機等が多用されているが、最近では、
プロジェクタ装置が使用されている。(Prior Art) Projectors and the like are often used as means for enlarging images such as characters and figures and projecting them onto a display screen.
A projector device is used.
この画像投影装置の基本原理は、第３図に示すように、
光源へと、この光源Ａから放射された光を反射して集光
させる反射鏡Ｂと、この反射鏡Ｂで集光された光をスク
リーンＣなどの投影面に投射する光学系レンズＤなどか
らなる投影装置とで構成されており、例えば液晶プロジ
ェクタ装置の場合は、液晶表示画面Ｅに表示された画像
が上記スクリーンＣに拡大して投影されるようになって
いる。The basic principle of this image projection device is as shown in Figure 3.
A reflector B that reflects and condenses the light emitted from the light source A to the light source, and an optical system lens D that projects the light condensed by the reflector B onto a projection surface such as a screen C. For example, in the case of a liquid crystal projector device, the image displayed on the liquid crystal display screen E is enlarged and projected onto the screen C.
このような画像投影装置に適用される反射鏡付投光装置
は、従来光源としてハロゲン電球が使用されていたが、
近年、メタルハライドランプ等の放電灯が使用されるよ
うになってきた。Conventionally, halogen bulbs have been used as light sources in floodlighting devices with reflectors applied to such image projection devices.
In recent years, discharge lamps such as metal halide lamps have come into use.
ここで、反射鏡付投光装置の構造について説明すれば、
凹面反射鏡の端部（底部）に形成された円筒状の光源取
付口に、光源の端部を挿入してそれら間隙に接着剤を充
填して反射鏡と光源とを一体化したものが知られている
。Here, the structure of the reflector-equipped floodlight device will be explained.
It is known that the end of the light source is inserted into the cylindrical light source installation hole formed at the end (bottom) of the concave reflector, and the gap is filled with adhesive to integrate the reflector and the light source. It is being
またこれら光源と反射鏡を一体化するときにＣ：反射鏡
を治具により固定し、光源の設置位置を偶調整させなが
ら、反射光の光強度やその配光分着を測定して、治具を
使用して最適な位置に光源苓固定させた後、反射鏡の開
口部方向から接着剤苓流し込み固着させて反射鏡と光源
の光軸とが一部するようにしている。In addition, when integrating these light sources and the reflecting mirror, C: fix the reflecting mirror with a jig, measure the light intensity of the reflected light and its light distribution, and adjust the installation position of the light source. After fixing the light source in an optimal position using a tool, adhesive is poured into the reflecting mirror from the direction of the opening and fixing it, so that the reflecting mirror and the optical axis of the light source are partially aligned.
そして光源としてメタルハライドランプ等のか電灯を用
いた場合には、周囲の温度等の状態により、放射する光
量や光色等の特性が変化するたとこの特性変化を防止す
るために、凹面反射鏡の声ａ部に例えばガラス等の透光
性部材をガラスフリット等の接着剤を介して取着して閉
塞した構造Ｃ筺体の内部に光源を収容することが考えら
れて（る。When an electric light such as a metal halide lamp is used as a light source, the characteristics such as the amount of light emitted and the color of the light change depending on conditions such as the surrounding temperature. It is conceivable to house the light source inside the Structure C housing, which is closed by attaching a light-transmitting member such as glass to part a through an adhesive such as glass frit.
（発明が解決しようとする課題）
ところで、反射鏡と光源を固着する場合には、接着剤が
反射鏡に流出し付着することを避けるために、前述のと
おり反射鏡の開口部方向から接着剤を流し込む方法が採
られているため、凹面反射鏡に透光体を取着するものは
、反射鏡と光源の光軸とが一致するように光源を固着し
た後に透光体を取着しなければならない。(Problem to be Solved by the Invention) By the way, when fixing the reflecting mirror and the light source, in order to prevent the adhesive from flowing out and adhering to the reflecting mirror, apply the adhesive from the direction of the opening of the reflecting mirror as described above. Since a method of pouring the light into the concave reflector is used, when attaching the light transmitting body to the concave reflector, the light source must be fixed so that the optical axis of the reflector and the light source match, and then the light transmitting body must be attached. Must be.
また、反射鏡付投光装置を、液晶プロジェクタ装置等の
画像投影装置に組込む際には、反射鏡付投光装置の前面
周縁を基準として、組込む場合が多く、上記のように透
光体が取着されたものは、透光体の周縁が反射鏡付投光
装置の設置位置の基準面となる。Furthermore, when a projector with a reflector is incorporated into an image projection device such as a liquid crystal projector, it is often installed using the front periphery of the projector with a reflector as a reference, and as described above, the light transmitting body is When attached, the periphery of the transparent body serves as a reference surface for the installation position of the projector with a reflecting mirror.
ところが、透光体はガラスフリット等の接着剤を介して
取着されているため、接着剤の厚みの不均衡に起因する
透光体と反射鏡との偏移が生じると、画像投影装置に対
して最適な反射光が照射されなくなるという問題があっ
た。However, since the light-transmitting body is attached via an adhesive such as glass frit, if a shift occurs between the light-transmitting body and the reflecting mirror due to an imbalance in the thickness of the adhesive, it may cause damage to the image projection device. However, there was a problem in that the optimum reflected light was not irradiated.
本発明はこのような事情に基づきなされたもので、透光
体と反射鏡とが偏移して取着された場合でも、画像投影
装置に組込んだ際に適正な反射光が得られる反射鏡付投
光装置を提供しようとするものである。The present invention has been made based on these circumstances, and provides a reflection system that allows proper reflected light to be obtained when incorporated into an image projection device even when the light-transmitting body and the reflecting mirror are attached with a deviation. The present invention aims to provide a mirror-equipped floodlighting device.
〔発明の構成コ
（課題を解決するための手段）
上記課題を解決するために本発明の反射鏡付投光装置は
、凹面反射鏡と、この凹面反射鏡の開口部を閉塞し、凹
面反射鏡によって反射された光を透過する透光体と、こ
の反射鏡に固定される光源きを備えたものであって、凹
面反射鏡の外径は、透光体の外径よりも大きいことを特
徴とするものである。[Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the projector with a reflector of the present invention includes a concave reflector, an opening of the concave reflector is closed, and a concave reflector is provided. It is equipped with a light transmitting body that transmits the light reflected by the mirror and a light source fixed to this reflecting mirror, and the outer diameter of the concave reflector is larger than the outer diameter of the light transmitting body. This is a characteristic feature.
（作用）
本発明においては、凹面反射鏡の外径を透光体の外径よ
りも大きくしであるため、画像投影装置に組込む際の設
置基準面を反射鏡の周縁にすることができ、その結果、
透光体と反射鏡とが偏移して取着された場合でも、画像
投影装置に組込んだ際に適正な反射光が得られる。(Function) In the present invention, since the outer diameter of the concave reflecting mirror is larger than the outer diameter of the light-transmitting body, the installation reference plane when incorporating it into an image projection device can be the periphery of the reflecting mirror. the result,
Even if the light transmitting body and the reflecting mirror are attached with a deviation, proper reflected light can be obtained when the light transmitting body and the reflecting mirror are installed in an image projecting device.
（実施例）
以下に本発明の反射鏡付投光装置に係る一実施例を図面
を参照して詳細に説明する。(Embodiment) An embodiment of the reflecting mirror-equipped light projector of the present invention will be described in detail below with reference to the drawings.
第１図に本発明の実施例を図示するように、光源である
メタルハライドランプ１は、例えば電極間距離が４〜１
０ｍｍに設定されたランプ電力が２２０Ｗタイプのもの
であり、その両端には圧潰封止部２が形成されている。As shown in FIG. 1, a metal halide lamp 1 serving as a light source has an inter-electrode distance of, for example, 4 to 1.
The lamp power is set to 0 mm and is of a 220 W type, and crush sealing portions 2 are formed at both ends thereof.
この封止部２には、電極と、この電極と各々接続するモ
リブデン等の金属箔と、この金属箔を介して電極と接続
する例えばモリブデン線等からなる電気導入体が封着さ
れている。This sealing portion 2 is sealed with an electrode, a metal foil such as molybdenum that is connected to each electrode, and an electricity introduction body made of, for example, a molybdenum wire that is connected to the electrode through the metal foil.
ここで電極は、例えば線径０．８ｍｍのタングステンＷ
からなる電極軸と、線径０． ６ｍｍのタングステンＷ
を３〜４回巻回して形成される電極コイル部とで構成さ
れている。Here, the electrode is, for example, tungsten W with a wire diameter of 0.8 mm.
An electrode shaft with a wire diameter of 0. 6mm tungsten W
and an electrode coil portion formed by winding the electrode 3 to 4 times.
尚、このランプ１内には、緩衝金属としての水銀と、金
属ハロゲン化物、およびアルゴンなどの希ガスが所定量
封入されている。The lamp 1 is filled with a predetermined amount of mercury as a buffer metal, a metal halide, and a rare gas such as argon.
本実施例の場合、金属ハロゲン化物は希土類の金属ハロ
ゲン化物とされており、沃素と臭素のハロゲンに、希土
類金属であるジスプロシウムＤＶ。In the case of this example, the metal halide is a rare earth metal halide, and the halogens of iodine and bromine are combined with dysprosium DV, which is a rare earth metal.
ホルミウムＨｏ、ツリウムＴｍが一緒に封入されている
。Holmium Ho and thulium Tm are sealed together.
したがって、ランプ内には、沃化ジスブロシウムＤＶＩ
沃化ホルミウムＨｏ Ｉ ３、沃化ツリ３ゝ
ラムＴｍＩ と臭化ジスプロシウムＤ ｙ Ｂ ｒ
ａ、臭化ホルミウムＨｏ Ｂ ｒ ａ、臭化ツｌＪ’７
ムＴｍＢｒ３が封入されている。Therefore, in the lamp there is disbrosium iodide DVI
Holmium iodide Ho I 3, tritrium iodide TmI and dysprosium bromide D y B r
a, holmium bromide Ho B r a, tribromide lJ'7
MuTmBr3 is encapsulated.
また、上記希土類金属ハロゲン化物の全体の封入量は２
．０＋ｇ／ｃｃとしてあり、これら封入物は沃化希土類
金属と臭化希土類金属との重量比をに０．５にしである
。In addition, the total amount of the rare earth metal halide enclosed is 2
．． 0+g/cc, and these inclusions have a weight ratio of rare earth metal iodide to rare earth metal bromide of 0.5.
また、反射鏡３は開口径が９０〜φ１３０ｍ１１のガラ
ス構体の内面にアルミニウム等の光反射性の優れた金属
を蒸着した回転２次曲面からなる凹面反射鏡であり、そ
の中央部（底部）には、円筒状の光源取付口４が形成さ
れている。In addition, the reflecting mirror 3 is a concave reflecting mirror consisting of a rotationally quadratic curved surface in which a metal with excellent light reflectivity such as aluminum is deposited on the inner surface of a glass structure with an aperture diameter of 90 to φ130 m11, and its center (bottom) A cylindrical light source attachment opening 4 is formed.
そして前述のメタルハライドランプ１は、その一方の封
止部２が反射鏡３の光源取付口４に挿入された状態で口
金５が装着され、例えばシリカやアルミナ等を主体とし
たペースト状の接着剤６を充填することによって、反射
鏡３に固着一体止されている。The aforementioned metal halide lamp 1 is fitted with a cap 5 with one sealing part 2 inserted into the light source mounting port 4 of the reflector 3, and is coated with a paste-like adhesive mainly made of silica, alumina, etc. 6, it is fixed and integrally fixed to the reflecting mirror 3.
ここで、メタルハライドランプ１と反射鏡３を一体化す
るときには、反射鏡３の開口部周縁を治具（図示せず）
に当接させて固定し、メタルハライドランプ１の位置を
微調整させながら、反射光の光強度やその配光分布を測
定して、最適反射光が得られる位置にメタルハライドラ
ンプ１を治具（図示せず）により固定させた後、反射鏡
３の開口部方向から上記接着剤６を流し込み固着させて
反射鏡３とメタルハライドランプ１の光軸とが一致する
ようにしている。Here, when integrating the metal halide lamp 1 and the reflecting mirror 3, the periphery of the opening of the reflecting mirror 3 is fixed with a jig (not shown).
While finely adjusting the position of the metal halide lamp 1, measure the light intensity of the reflected light and its light distribution, and place the metal halide lamp 1 in the jig (Fig. (not shown), the adhesive 6 is poured into the reflecting mirror 3 from the direction of the opening and is fixed, so that the optical axis of the reflecting mirror 3 and the metal halide lamp 1 are aligned.
また、反射鏡３とメタルハライドランプ１を一体化した
後、反射鏡３の開口部に例えばガラス等の透光性材料で
形成された透光体７をガラスフリット等の接着剤（図示
せず）を使用して取着する。After integrating the reflecting mirror 3 and the metal halide lamp 1, a transparent body 7 made of a transparent material such as glass is attached to the opening of the reflecting mirror 3 using an adhesive such as glass frit (not shown). Attach using.
この透光体７は、その外径が、反射鏡３の開口部の外径
よりも小さく形成されているものであり、換言すれば、
反射鏡３の周縁が透光体７から突出する形状となってい
る。This transparent body 7 has an outer diameter smaller than the outer diameter of the opening of the reflecting mirror 3. In other words,
The peripheral edge of the reflecting mirror 3 is shaped to protrude from the transparent body 7.
したがって、上記実施例の反射鏡付投光装置のものは、
凹面反射鏡の外径を透光体の外径よりも大きくしである
ため、画像投影装置に組込む際の設置基準面を、第２図
中斜線で示すようにこの突出した反射鏡の周縁にするこ
とができる。Therefore, the reflecting mirror-equipped floodlighting device of the above embodiment has the following characteristics:
Since the outer diameter of the concave reflector is larger than the outer diameter of the light-transmitting body, the installation reference plane when incorporating it into the image projector is set at the periphery of this protruding reflector, as shown by diagonal lines in Figure 2. can do.
その結果、透光体と反射鏡とが偏移して取着された場合
でも、画像投影装置に糺込んだ際に適正な反射光が得ら
れるものである。As a result, even if the light transmitting body and the reflecting mirror are attached with a deviation, proper reflected light can be obtained when the light transmitting body and the reflecting mirror are inserted into an image projecting device.
［発明の効果］
以上説明した本発明においては、凹面反射鏡の外径を透
光体の外径よりも大きくしであるため、画像投影装置に
組込む際の設置基準面を反射鏡の周縁にすることができ
、その結果、透光体と反射鏡とが偏移して取着された場
合でも、画像投影装置に糺込んだ際に適正な反射光が得
られる。[Effects of the Invention] In the present invention described above, since the outer diameter of the concave reflecting mirror is larger than the outer diameter of the light-transmitting body, the installation reference plane when incorporated into an image projection device is set at the periphery of the reflecting mirror. As a result, even if the light transmitting body and the reflecting mirror are attached with a deviation, proper reflected light can be obtained when the light transmitting body and the reflecting mirror are inserted into an image projecting device.
第１図は本発明の一実施例に係る反射鏡付投光装置を示
す概略図、第２図は第１図に示した反射鏡付投光装置の
設置基準面を示す図面、第３図は画像投影装置の基本原
理を示す構成図である。
１・・・メタルハライドランプ
２・・・封止部 ３・・・反射鏡４・・・光源取
付口
５・・・口金
６・・・接着剤
７・・・透光体FIG. 1 is a schematic diagram showing a light projector with a reflector according to an embodiment of the present invention, FIG. 2 is a drawing showing an installation reference plane of the light projector with a reflector shown in FIG. 1, and FIG. 1 is a configuration diagram showing the basic principle of an image projection device. 1...Metal halide lamp 2...Sealing part 3...Reflector 4...Light source installation port 5...Base 6...Adhesive 7...Translucent body
Claims (1)
凹面反射鏡によって反射された光を透過する透光体と、
前記反射鏡に固定される光源とを具備した反射鏡付投光
装置であって、 前記凹面反射鏡の外径は、前記透光体の外径よりも大き
いことを特徴とする反射鏡付投光装置。[Scope of Claims] A concave reflecting mirror; a transparent body that closes an opening of the concave reflecting mirror and transmits light reflected by the concave reflecting mirror;
A reflector-equipped light projector comprising a light source fixed to the reflector, wherein an outer diameter of the concave reflector is larger than an outer diameter of the transparent body. light device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2271586A JPH04147125A (en) | 1990-10-09 | 1990-10-09 | Light projection device with reflecting mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2271586A JPH04147125A (en) | 1990-10-09 | 1990-10-09 | Light projection device with reflecting mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04147125A true JPH04147125A (en) | 1992-05-20 |
Family
ID=17502146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2271586A Pending JPH04147125A (en) | 1990-10-09 | 1990-10-09 | Light projection device with reflecting mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04147125A (en) |
-
1990
- 1990-10-09 JP JP2271586A patent/JPH04147125A/en active Pending
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