JP2596338B2 - Lighting equipment for video display devices - Google Patents
Lighting equipment for video display devicesInfo
- Publication number
- JP2596338B2 JP2596338B2 JP5250119A JP25011993A JP2596338B2 JP 2596338 B2 JP2596338 B2 JP 2596338B2 JP 5250119 A JP5250119 A JP 5250119A JP 25011993 A JP25011993 A JP 25011993A JP 2596338 B2 JP2596338 B2 JP 2596338B2
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- holding member
- image
- lamp
- light source
- 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
Links
Landscapes
- Projection Apparatus (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スクリーン等に映像を
拡大表示する映像表示装置に使用される照明装置に関
し、特に反射鏡の位置ずれを修正できる、映像表示装置
の照明装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device used for an image display device for enlarging and displaying an image on a screen or the like, and more particularly to an illuminating device for an image display device capable of correcting a displacement of a reflecting mirror.
【０００２】[0002]
【従来の技術】図２は映像表示装置に用いられる従来の
照明装置の断面を示す。同図に示されるように、従来の
照明装置はランプ１１と、反射面が凹曲面に形成された
反射鏡１２と、反射鏡１２を図４の縦方向にずれないよ
うに所定の位置に支持する支持部材１３と、反射鏡１２
が支持部材１３の所定の位置から図４の横方向にずれな
いように押圧挟持する保持部材１４とを有する。ランプ
１１は口金１５を介して反射鏡１２の中心に設けられて
いる。反射鏡１２はランプ１１からの光を図示されてい
ない原画映像に照射するため、支持部材１３の方向に反
射させるものであり、ガラスにより形成されている。ま
た反射鏡１２は凹面部１２ａと、凹面部１２ａの端部に
連設された突出部１２ｂ（図４の水平方向）を有する。
突出部１２ｂを押圧挟持する保持部材１４は、鉄等の金
属から形成されておりコの字状の端部を有し、支持部材
１３にネジ１８によって固定されている。2. Description of the Related Art FIG. 2 shows a cross section of a conventional lighting device used for an image display device. As shown in FIG. 1, the conventional lighting apparatus supports a lamp 11, a reflecting mirror 12 having a reflecting surface formed as a concave curved surface, and supporting the reflecting mirror 12 at predetermined positions so as not to shift in the vertical direction of FIG. Supporting member 13 and reflecting mirror 12
And a holding member 14 for pressing and holding the supporting member 13 so as not to be shifted from a predetermined position in the lateral direction in FIG. The lamp 11 is provided at the center of the reflecting mirror 12 via the base 15. The reflecting mirror 12 reflects the light from the lamp 11 toward the support member 13 in order to irradiate the light from the lamp 11 onto an original image (not shown), and is formed of glass. Further, the reflecting mirror 12 has a concave portion 12a and a protruding portion 12b (horizontal direction in FIG. 4) connected to an end of the concave portion 12a.
The holding member 14 that presses and holds the protruding portion 12b is formed of metal such as iron, has a U-shaped end, and is fixed to the support member 13 with a screw 18.
【０００３】スクリーンに拡大映像を表示する際には、
映像表示装置に使用された上記の照明装置のランプ１１
を点灯し、ランプ１１からの光を直接、または反射鏡１
２によって反射させた反射光を液晶表示画面等の原画映
像に照射して、スクリーンに拡大映像を得る。When displaying an enlarged image on a screen,
Lamp 11 of the above lighting device used for video display device
Is turned on, and the light from the lamp 11 is directly irradiated or the reflecting mirror 1 is turned on.
The reflected light reflected by 2 is applied to an original image such as a liquid crystal display screen to obtain an enlarged image on the screen.
【０００４】ところでランプ１が点灯されると、反射鏡
１２と保持部材１４はランプ１１からの熱をうけて温度
が上昇する。ガラスよりなる反射鏡１２と鉄により形成
された保持部材１４とでは熱膨張率が異なる為、仮に反
射鏡１２の凹面部１２ａを保持部材１４が押圧保持する
と、保持部材１４から反射鏡１２の凹面部１２ａに力が
加わり、保持部材１４が反射鏡１２の凹面部１２ａを変
形、破損させることがある。それを防止する為、反射鏡
１２の凹面部１２ａの端部に連接された突出部１２ｂを
保持部材１４で支持部材１３に押圧して挟持している。
１９は、それによって反射鏡１２の凹面部１２ａと保持
部材１４の間に生じた間隙である。When the lamp 1 is turned on, the temperature of the reflecting mirror 12 and the holding member 14 rises due to the heat from the lamp 11. Since the thermal expansion coefficient differs between the reflecting mirror 12 made of glass and the holding member 14 made of iron, if the holding member 14 presses and holds the concave portion 12a of the reflecting mirror 12, the concave surface of the reflecting mirror 12 When a force is applied to the portion 12a, the holding member 14 may deform or damage the concave portion 12a of the reflecting mirror 12. In order to prevent this, the protruding portion 12b connected to the end of the concave portion 12a of the reflecting mirror 12 is pressed by the holding member 14 against the supporting member 13 to be sandwiched.
Reference numeral 19 denotes a gap generated between the concave portion 12a of the reflecting mirror 12 and the holding member 14 thereby.
【０００５】[0005]
【発明が解決しようとする課題】上記のように従来の照
明装置においては、反射鏡１２の凹面部１２ａに連設さ
れた突出部１２ｂを保持部材１４が支持部材１３に押圧
して挟持する為、反射鏡１２の凹面部１２ａと保持部材
１４の間に間隙１９が生じていた。ところで、照明装置
は輸送時や移動時に衝撃を受けることがあるが、この間
隙１９があるため、装置が衝撃を受けたときに反射鏡１
２が支持部材１３に対する正規の位置から水平方向に移
動することがあった。こうした反射鏡１２の位置ずれに
より、装置の使用時に原画映像を照明する設計どうりの
光束が得られなくなり、投影スクリーン上の映像に照度
むらが生じるという問題点があった。As described above, in the conventional illuminating device, the holding member 14 presses and clamps the protruding portion 12b connected to the concave portion 12a of the reflecting mirror 12 with the supporting member 13. A gap 19 is formed between the concave portion 12a of the reflecting mirror 12 and the holding member 14. By the way, the illuminating device may receive an impact during transportation or movement. However, due to the gap 19, when the illuminating device receives an impact, the reflecting mirror 1 may be damaged.
2 may move in a horizontal direction from a normal position with respect to the support member 13. Such a displacement of the reflecting mirror 12 makes it impossible to obtain a luminous flux as designed to illuminate the original image during use of the apparatus, and there is a problem that uneven illuminance occurs in the image on the projection screen.
【０００６】本発明は上記課題を解決するためになされ
たものであり、本発明の目的は、保持部材の熱膨張によ
る反射鏡の変形、破損を防ぐとともに、照明装置の移動
の際に生じる反射鏡の位置ずれを修正し、映像の照度む
らを防ぐことのできる照明装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent deformation and breakage of a reflecting mirror due to thermal expansion of a holding member and to prevent reflection caused when a lighting device is moved. It is an object of the present invention to provide an illumination device that can correct a position shift of a mirror and prevent uneven illuminance of an image.
【０００７】[0007]
【課題を解決するための手段】本発明によれば、原画映
像に光を投影して拡大映像を表示する映像表示装置に使
用される照明装置において、該装置は、光源と、前記光
源からの光を原画映像の方向に反射させる反射鏡と、前
記反射鏡を所定の位置に支持する支持部材とを有し、前
記支持部材は、形状記憶合金により形成され前記光源の
熱によって記憶形状に変形する際に前記反射鏡の位置ず
れを修正する保持部材を含み、前記反射鏡の修正位置は
投射映像の照度むらを防ぐ位置であることを特徴とす
る。According to the present invention, there is provided an illumination device used in an image display device for displaying an enlarged image by projecting light onto an original image, comprising: a light source; It has a reflector for reflecting light in the direction of the original image, and a support member for supporting the reflector in a predetermined position, and the support member is formed of a shape memory alloy and is deformed into a memory shape by heat of the light source. And a holding member for correcting a displacement of the reflecting mirror when performing the correction, wherein the correcting position of the reflecting mirror is a position for preventing uneven illuminance of a projected image.
【０００８】[0008]
【作用】本発明において、反射鏡を保持する保持部材
は、熱を受けると記憶形状に復元する形状記憶合金で形
成され、照明装置の使用時に光源が点灯されると、光源
からの熱を受けて記憶形状に復元する。よって装置の移
動時に、衝撃等により保持部材が変形し反射鏡の位置ず
れが生じている場合にも、点灯された光源の熱を受けて
保持部材が記憶形状に変形し、反射鏡を元の正しい位置
にもどすので、反射鏡の位置ずれが修正される。In the present invention, the holding member for holding the reflecting mirror is formed of a shape memory alloy which restores a memory shape when receiving heat, and receives heat from the light source when the light source is turned on during use of the lighting device. To restore the memory shape. Therefore, even when the holding member is deformed due to an impact or the like and the position of the reflecting mirror is shifted when the apparatus is moved, the holding member is deformed into a memory shape due to the heat of the light source that is turned on, and the reflecting mirror is returned to its original shape. Since it returns to the correct position, the displacement of the reflecting mirror is corrected.
【０００９】[0009]
【実施例】次に添付図面を参照して、本発明による照明
装置の実施例を詳細に説明する。図１は、本発明による
照明装置の一実施例を示す断面図である。図１に示され
るように本装置は、ランプ１と、反射面が凹曲面に形成
された反射鏡２と、反射鏡２を図１の縦方向にずれない
ように所定の位置に支持する支持部材３と、反射鏡２が
支持部材３の所定の位置から図１の横方向にずれないよ
うに支持部材３へ押圧して保持する保持部材４とからな
る。ランプ１は口金５を介して反射鏡２の中心に設けら
れている。反射鏡２はランプ１からの光を図示されてい
ない映像に照射するため、支持部材３の方向に反射させ
るものであり、ガラスにより形成されている。反射鏡２
は凹面部２ａと、凹面部２ａの端部に連接された突出部
１２ｂ（図１の水平方向）を有する。また、反射鏡２の
端部を保持する保持部材４は、外力が加わると変形し、
加熱されると記憶形状に復元する形状記憶合金により形
成されている。保持部材４は、略くの字状の保持部を有
し、保持部の一方の端部を反射鏡２の凹曲面に外側（裏
側）より押圧して反射鏡２を保持し、他方の端部はネジ
６により支持部材３に固定されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention. FIG. 1 is a sectional view showing one embodiment of a lighting device according to the present invention. As shown in FIG. 1, the apparatus includes a lamp 1, a reflecting mirror 2 having a reflecting surface formed into a concave curved surface, and a support for supporting the reflecting mirror 2 at a predetermined position so as not to shift in the vertical direction of FIG. The member 3 includes a holding member 4 that presses and holds the reflecting mirror 2 against the supporting member 3 so that the reflecting mirror 2 does not shift from a predetermined position of the supporting member 3 in the horizontal direction in FIG. The lamp 1 is provided at the center of the reflecting mirror 2 via a base 5. The reflecting mirror 2 reflects the light from the lamp 1 in the direction of the support member 3 to irradiate light (not shown) to an image (not shown), and is made of glass. Reflecting mirror 2
Has a concave portion 2a and a protruding portion 12b (horizontal direction in FIG. 1) connected to an end of the concave portion 2a. The holding member 4 holding the end of the reflecting mirror 2 is deformed when an external force is applied,
It is formed of a shape memory alloy that restores a memory shape when heated. The holding member 4 has a substantially U-shaped holding portion, and presses one end of the holding portion against the concave curved surface of the reflecting mirror 2 from the outside (back side) to hold the reflecting mirror 2 and the other end. The part is fixed to the support member 3 by screws 6.
【００１０】スクリーンに拡大映像を表示する際には、
映像表示装置に装備された照明装置のランプ１を点灯
し、ランプ１からの光を直接、または反射鏡２によって
反射させて支持部材３の方向に照射させ、光束を図示さ
れていない原画映像に照射してスクリーンに拡大映像を
得る。When displaying an enlarged image on a screen,
The lamp 1 of the illumination device provided in the image display device is turned on, and the light from the lamp 1 is emitted directly or reflected by the reflecting mirror 2 to the direction of the support member 3, and the luminous flux is applied to an original image (not shown). Illuminate to get an enlarged image on the screen.
【００１１】図２、図３は図１の照明装置の保持部材４
と反射鏡２の関係を示す一部拡大図であり、図２は衝撃
を受ける前もしくは反射鏡２の位置ずれが修正された後
を示し、図３は衝撃を受けて反射鏡２の位置ずれが生じ
た状態を示す。FIGS. 2 and 3 show a holding member 4 of the lighting device of FIG.
FIG. 2 is a partially enlarged view showing a relationship between the reflector 2 and the mirror 2 before impact or after the displacement of the reflector 2 is corrected, and FIG. Shows the state in which the occurrence has occurred.
【００１２】まず、図２に示すように装置が衝撃を受け
る前は、上記のように反射鏡２は支持部材３の所定の位
置から水平方向にずれないように保持部材４によって支
持部材３へ押圧されて保持されている。この状態で反射
鏡２の端部を支持する保持部材４は、記憶形状を示して
いる。図３に示すように装置が衝撃を受けると、保持部
材４はくの字状の角度がより鋭角になるように変形し、
反射鏡２は矢印Ａ方向に位置ずれを生じる。ここで照明
装置を使用し、ランプ１を点灯すると保持部材４はラン
プ１の熱を受ける。保持部材４は熱を受けると形状記憶
に復元し、その際に反射鏡２を矢印Ｂ方向に押して反射
鏡２の位置ずれを修正する。First, as shown in FIG. 2, before the apparatus receives an impact, the reflecting mirror 2 is moved to the supporting member 3 by the holding member 4 so as not to be displaced in a horizontal direction from a predetermined position of the supporting member 3 as described above. Pressed and held. In this state, the holding member 4 supporting the end of the reflecting mirror 2 has a memory shape. When the device receives an impact as shown in FIG. 3, the holding member 4 is deformed so that the angle of the U-shape becomes more acute,
The reflecting mirror 2 is displaced in the direction of arrow A. Here, when the lighting device is used and the lamp 1 is turned on, the holding member 4 receives the heat of the lamp 1. When the holding member 4 receives the heat, the shape is restored to the shape memory. At this time, the reflecting mirror 2 is pushed in the direction of the arrow B to correct the displacement of the reflecting mirror 2.
【００１３】本実施例においては、凹面反射鏡２を支持
する保持部材４は、熱を受けると記憶形状に復元する形
状記憶合金で形成されているので照明装置の使用時にラ
ンプ１が点灯されると、保持部材４はランプ１からの熱
を受けて記憶形状に復元する。装置の移動時に、衝撃に
より保持部材４が図３に示すように変形し反射鏡２の位
置ずれが生じても、照明装置を使用するとライト１の熱
を受けて保持部材４が記憶形状に復元し、保持している
反射鏡２を元の位置にもどす。よって、反射鏡２の位置
ずれが修正され、スクリーンに表示される拡大映像の照
度むらを防ぐことができるという効果がある。In this embodiment, since the holding member 4 for supporting the concave reflecting mirror 2 is formed of a shape memory alloy which restores a memory shape when it receives heat, the lamp 1 is turned on when the lighting device is used. Then, the holding member 4 receives the heat from the lamp 1 and restores the memory shape. When the device is moved, even if the holding member 4 is deformed due to an impact as shown in FIG. Then, the held reflecting mirror 2 is returned to the original position. Therefore, there is an effect that the positional deviation of the reflecting mirror 2 is corrected, and uneven illuminance of the enlarged image displayed on the screen can be prevented.
【００１４】なお本実施例では、保持部材は、くの字状
の端部が反射鏡２の凹曲面の端部付近を裏側から押圧保
持しているが、本発明はこれに限定されず、凹曲面の他
の部分を保持するものであってもよいし、又、反射鏡２
の凹曲面を表側から保持する他の形状であってもよい。In this embodiment, the holding member presses and holds the vicinity of the end of the concave curved surface of the reflecting mirror 2 from the back side, but the present invention is not limited to this. It may hold other portions of the concave curved surface,
It may be another shape that holds the concave curved surface from the front side.
【００１５】本発明の装置によれば、反射鏡を保持する
保持部材は、反射鏡を正規の位置に修正する記憶形状に
熱により復元する形状記憶合金により形成される。よっ
て、光源からの熱による保持部材の膨張による反射鏡の
変形、破損を防ぐとともに、装置の移動時に、衝撃によ
り保持部材が変形し反射鏡の位置がずれが生じても、照
明装置の使用時に保持部材は記憶形状に復元して、反射
鏡をもとの位置に戻すので、反射鏡の位置ずれを修正す
る。従って、照明装置の反射鏡の位置ずれによる、拡大
映像の照度むらを防ぐことができるという効果がある。According to the apparatus of the present invention, the holding member for holding the reflecting mirror is formed of a shape memory alloy that restores by heat to a memory shape for correcting the reflecting mirror to a normal position. Therefore, while preventing deformation and breakage of the reflecting mirror due to expansion of the holding member due to heat from the light source, even when the holding member is deformed due to an impact during the movement of the device and the position of the reflecting mirror is displaced, when the lighting device is used, Since the holding member is restored to the memorized shape and the reflecting mirror is returned to the original position, the displacement of the reflecting mirror is corrected. Therefore, there is an effect that illuminance unevenness of an enlarged image due to a displacement of a reflecting mirror of the lighting device can be prevented.
【図１】本発明による照明装置の一実施例を示す断面図
である。FIG. 1 is a sectional view showing an embodiment of a lighting device according to the present invention.
【図２】図１の反射鏡が正しい位置にある状態を示す一
部拡大断面図である。FIG. 2 is a partially enlarged cross-sectional view showing a state where the reflecting mirror of FIG. 1 is in a correct position.
【図３】図１の反射鏡がずれた位置にある状態を示す一
部拡大断面図である。FIG. 3 is a partially enlarged cross-sectional view showing a state in which the reflecting mirror of FIG. 1 is shifted.
【図４】従来の照明装置の一例を示す断面図である。FIG. 4 is a cross-sectional view illustrating an example of a conventional lighting device.
１ ランプ ２ 反射鏡 ３ 支持部材 ４ 保持部材 DESCRIPTION OF SYMBOLS 1 Lamp 2 Reflecting mirror 3 Support member 4 Holding member
Claims (2)
する映像表示装置に使用される照明装置において、該装
置は、 光源と、 前記光源からの光を原画映像の方向に反射させる反射鏡
と、 前記反射鏡を所定の位置に支持する支持部材とを有し、 前記支持部材は、形状記憶合金により形成され前記光源
の熱によって記憶形状に変形する際に前記反射鏡の位置
ずれを修正する保持部材を含み、 前記反射鏡の修正位置は投射映像の照度むらを防ぐ位置
であることを特徴とする映像表示装置の照明装置。1. An illumination device used in an image display device for displaying an enlarged image by projecting light onto an original image, comprising: a light source; and a reflection for reflecting light from the light source in a direction of the original image. A mirror, and a supporting member for supporting the reflecting mirror at a predetermined position, wherein the supporting member is formed of a shape memory alloy, and displaces the reflecting mirror when deformed into a memory shape by heat of the light source. An illumination device for an image display device, comprising: a holding member to be corrected; and wherein the correction position of the reflector is a position for preventing uneven illuminance of a projected image.
射鏡は凹曲面に形成され、前記保持部材は前記反射鏡の
凹曲面を裏側から押圧保持する略くの字型の部材を含む
ことを特徴とする映像表示装置の照明装置。2. The apparatus according to claim 1, wherein the reflecting mirror is formed in a concave curved surface, and the holding member includes a substantially U-shaped member that presses and holds the concave curved surface of the reflecting mirror from behind. A lighting device for a video display device, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5250119A JP2596338B2 (en) | 1993-09-10 | 1993-09-10 | Lighting equipment for video display devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5250119A JP2596338B2 (en) | 1993-09-10 | 1993-09-10 | Lighting equipment for video display devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0784166A JPH0784166A (en) | 1995-03-31 |
| JP2596338B2 true JP2596338B2 (en) | 1997-04-02 |
Family
ID=17203111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5250119A Expired - Fee Related JP2596338B2 (en) | 1993-09-10 | 1993-09-10 | Lighting equipment for video display devices |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596338B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134235U (en) * | 1984-02-20 | 1985-09-06 | 東芝ライテック株式会社 | lighting equipment |
| JPS61159120A (en) * | 1984-12-29 | 1986-07-18 | Shimadzu Corp | Spectrophotometer |
-
1993
- 1993-09-10 JP JP5250119A patent/JP2596338B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0784166A (en) | 1995-03-31 |
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