JP4069828B2 - Light source device - Google Patents

Light source device Download PDF

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JP4069828B2
JP4069828B2 JP2003285061A JP2003285061A JP4069828B2 JP 4069828 B2 JP4069828 B2 JP 4069828B2 JP 2003285061 A JP2003285061 A JP 2003285061A JP 2003285061 A JP2003285061 A JP 2003285061A JP 4069828 B2 JP4069828 B2 JP 4069828B2
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light source
base
source device
power supply
supply line
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JP2005056646A5 (en
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純夫 上原
嗣 漆原
正之 大野
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Iwasaki Denki KK
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Description

この発明は、反射鏡と組み合わせて用いられる光学的に効率が良い、主に映像用機器、或いは光学用機器の光源である光源装置に関する。 The present invention relates to a light source device which is used in combination with a reflecting mirror and which is optically efficient and is mainly a light source for video equipment or optical equipment.

従来、こうした光源装置は、主にプロジェクターやプロジェクションTV、映写機などに使用されている。 Conventionally, such light source devices are mainly used for projectors, projection TVs, projectors, and the like.

この反射型ランプを使用したプロジェクターは、用途としてテレビ(CRT)やOHP(オーバーヘッドプロジェクタ)の代わりとして普及しつつある。中でも、液晶プロジェクター、DLP(デジタル ライト プロセッシング)プロジェクターの普及は著しい。
こうしたプロジェクターに対する要求としては、高解像度、高精細とともに、明るさの向上、照射画面の均一性、小型軽量、低コストなどがある。近年、各プロジェクターに用いられるLCD(液晶ディスプレイ)パネルの透過率、DMD(デジタル ミラー ディバイス)チップの反射率の向上は著しく、より小型の素子で特性の向上が図れる様になっている。
Projectors using this reflective lamp are becoming popular as a substitute for television (CRT) and OHP (overhead projector). Among them, the spread of liquid crystal projectors and DLP (digital light processing) projectors is remarkable.
The requirements for such a projector include high resolution, high definition, improved brightness, uniformity of the illuminated screen, small size, light weight, and low cost. In recent years, the transmittance of an LCD (liquid crystal display) panel used in each projector and the reflectance of a DMD (digital mirror device) chip have been remarkably improved, and characteristics can be improved with smaller elements.

こうした要求の小型軽量、低コストに向け、プロジェクターに使用されるLCDチップ又はDMDチップは小さくなり、使用される光源装置も小型化を要求されている。こうした背景の中、光源装置へは、小型化に加え光の利用率向上も、より求められている。 To meet these demands for small size, light weight and low cost, LCD chips or DMD chips used in projectors are becoming smaller, and light source devices used are also required to be downsized. In such a background, light source devices are required to improve light utilization in addition to miniaturization.

プロジェクターの小型化を考えた場合、光源装置の小型化も必修条件の一つとなる。現在においては、使用される反射鏡の小型化も進み、150Wクラスを見ても外形50mm×50mmサイズより小さなサイズの光源装置も検討されている。また、小型化に際しては光源装置の奥行きも重要な項目となっており、放電灯の短尺化も進んでいる。
反射鏡外形の小型化により、反射有効面積が減少し、出射光の減少が懸念されるが、放電灯の短アーク化や発光効率の向上、楕円鏡の使用などにより、従来の同クラスに対し、出射光の大きな減少は見られていない。
When considering miniaturization of the projector, miniaturization of the light source device is one of the mandatory conditions. At present, the miniaturization of the reflector used is also progressing, and a light source device having a size smaller than the outer size of 50 mm × 50 mm is considered even in the 150 W class. In addition, the depth of the light source device is an important item for downsizing, and the discharge lamps are becoming shorter.
Due to the smaller size of the reflector, the effective reflection area is reduced, and there is a concern that the emitted light will be reduced. However, by shortening the arc of the discharge lamp, improving the luminous efficiency, and using an elliptical mirror, etc. There is no significant decrease in emitted light.

光源装置の奥行き減少による放電灯の短尺化は、シール長を短くする事で対応している場合が多く、シール長を短くした場合、モリブ箔と電力供給線との溶接部の温度上昇を招き、溶接部の酸化が促進され、不導通となり短期に不点灯になる不具合が生じる。こうした溶接点温度上昇に対して、酸化を抑制するためフリット剤の充填などにより空気の遮断を講じる場合があるが光源装置寿命末期までの十分な効果は得られておらず、送風による冷却手段を用いらざるをえないのが現状である。 The shortening of the discharge lamp by reducing the depth of the light source device is often dealt with by shortening the seal length. When the seal length is shortened, the temperature of the welded portion between the molyb foil and the power supply line is increased. The oxidation of the welded portion is promoted, resulting in a problem of non-conduction and short lighting. In order to suppress oxidation at such welding point temperature, air may be blocked by filling with a frit agent, etc., but sufficient effect until the end of the life of the light source device has not been obtained. At present, it must be used.

反射鏡ボトム部側のシール部に対しては、反射鏡との固定の際に耐熱性アルミナ、シリカを主成分とする接着剤が用いられ、場合によってはセラミック碍子を介する場合も多い。
こうした場合は、接着剤等による保温効果も生じる事になり、温度上昇に対し不利となるが、セラミックの構造を工夫する事により通風構造を設け、冷却効果を上げている場合も見られる(特許文献2参照)。さらに、セラミック碍子内で電力供給線と外部線を結線する場合もあるが、この場合は温度上昇に対し不利に働く事に加え、結線部の取り回し等によっては、短尺化に対しても不利となる。
An adhesive mainly composed of heat-resistant alumina and silica is used for the sealing part on the bottom side of the reflecting mirror when fixing to the reflecting mirror, and in some cases, a ceramic insulator is often used.
In such a case, a heat retention effect by an adhesive or the like also occurs, which is disadvantageous for a temperature rise. However, there is a case where a cooling structure is improved by providing a ventilation structure by devising a ceramic structure (patent) Reference 2). Furthermore, there are cases where the power supply line and the external line are connected inside the ceramic insulator. In this case, in addition to working against the temperature rise, it may be disadvantageous for shortening depending on the handling of the connection part. Become.

短尺化を最優先に考えた場合、電力供給線と外部線の結線を光源装置の奥行きに影響の無いところで結線する例もあるが、図4及び図5に示す従来例の如く、電力供給線20口金23の端面24側で反射鏡21の光軸に対し略直角に折り曲げて外部線22に結線する方法が最も効率的である。しかしながら、こうした場合には、電力供給線20の屈曲部から口金23内の部分にかけて負荷が掛かり、機械的強度が問題となる。 When considering shortening the length as a top priority, there is an example in which the connection between the power supply line and the external line is made where there is no influence on the depth of the light source device . However, as in the conventional example shown in FIGS. how to wire connection to the external line 22 is bent substantially at right angles to the optical axis X of the reflector 21 to 20 at the end face 24 side of the base 23 is most efficient. However, in such a case, a load is applied from the bent portion of the power supply line 20 to a portion in the base 23, and the mechanical strength becomes a problem.

つまり、図6に従来例の電力供給線折り曲げ部の拡大図を示す。図面上に電力供給線20の折り曲げられる部分をAで示してある。この折り曲げ部分図面上の矢印に示すように、口金23の端面24に沿って口金23の周方向に回動せられたり(図6(a)参照)、反射鏡21の光軸X方向や光軸Xと直交する方向に振り動かされる(図6(b)参照)電力供給線20の動きに対する支点となるため、外部から最も負荷がかかる部分であり、かつ、その部分Aから口金23内の部分にかけては、放電灯の発光管封止部を溶封する際の熱的影響により機械的強度が低下しているから、外部から負荷がかかると破断するおそれがある。更に図6の状態から、電力供給線20に外部線22を接続した場合には、その電力供給線20の折り曲げA部分から口金23内の部分にかけてさらに大きな負荷が掛かることになり、問題となる事は容易に推測できる。機械的強度が低下する That is, FIG. 6 shows an enlarged view of a power supply line bent portion of the conventional example. A portion where the power supply line 20 is bent is indicated by A in the drawing. The bent portion A is rotated in the circumferential direction of the base 23 along the end surface 24 of the base 23 as shown by the arrow in the drawing (see FIG. 6A), or the optical axis X of the reflecting mirror 21. since the fulcrum for the movement of the direction or are swung in a direction perpendicular to the optical axis X (see FIG. 6 (b)) the power supply line 20, Ri Ah at a portion most external load is applied, and, from that portion a Since the mechanical strength of the portion in the base 23 is lowered due to the thermal influence when the arc tube sealing portion of the discharge lamp is sealed, there is a possibility of breaking when a load is applied from the outside. Further, when the external line 22 is connected to the power supply line 20 from the state of FIG. 6, a larger load is applied from the bent portion A of the power supply line 20 to the portion in the base 23, which is a problem. Things can be easily guessed. Reduces mechanical strength

こうした問題に対し、電力供給線を捻じる、引っ張るなどの行為を行った場合に生じる力を遮るために、反射鏡ボトム部側に突設した供給線固定部材によって電力供給線を固定する例も報告されているが(特許文献1参照)、小型化の観点、特に光源装置の奥行きを考慮した場合には不利になることは明らかである。
また、反射鏡開放部側の電力供給線と外部線との結線の様に、反射鏡に結線のための受け台を設ける場合もあるが、受け台を設ける場合、反射鏡に取り付け部品用の穴を開けなくてはならず、反射鏡の特性を損なう事になるばかりか、反射鏡の有効面をなるべく損なわない様にするため、より反射鏡の開放部へ受け台を取り付けなくてはならず、反射鏡ボトム部側の電力供給線を長く這わせる必要が生じる。こうした場合、光源装置を点灯させるための高電圧と周辺部品の絶縁の問題が生じる。
In order to block the force generated when an action such as twisting or pulling the power supply line is performed against such a problem, there is also an example in which the power supply line is fixed by a supply line fixing member protruding from the reflector bottom side. Although it has been reported (see Patent Document 1) , it is obvious that it is disadvantageous when considering the viewpoint of miniaturization, particularly the depth of the light source device.
In addition, there are cases where a cradle for connection is provided on the reflector, such as the connection between the power supply line on the open side of the reflector and the external line. A hole must be drilled, not only detracting from the characteristics of the reflector, but in order to avoid damaging the effective surface of the reflector as much as possible, a cradle must be attached to the open part of the reflector. Therefore, it is necessary to keep the power supply line on the bottom side of the reflector long. In such a case, there arises a problem of high voltage for lighting the light source device and insulation of peripheral components.

特開2002−260432号公報JP 2002-260432 A 特許第3353693号公報Japanese Patent No. 3353893

本発明は、光源装置の小型化を最優先で考えた場合、電力供給線と外部線の結線を光源装置の奥行きに影響の無い様、電力供給線を光軸に対し直角に折り曲げ、効率良く小型化を図った場合でも機械強度的に問題とならず、光源装置を点灯させるための高電圧と周辺部品の絶縁の問題も生じない良好な光源装置を提供する事にある。 The invention, when considered in top priority in size of the light source device, as no influence the wiring of the power supply line and the external line to the depth of the light source device, bent substantially at a right angle to the optical axis power supply line, It is an object of the present invention to provide a good light source device which does not cause a problem in mechanical strength even when it is efficiently downsized, and does not cause a problem of high voltage for lighting the light source device and insulation of peripheral components.

上記目的を達成するため、本発明は、一対の電極を有するダブルエンド型放電灯が反射鏡に光軸配置され、放電灯の一は口金を有し反射鏡ボトム部に固定され、反射鏡ボトム部に固定された側の電力供給線が、反射鏡ボトム部付近で外部線と結線される構造を持つ反射鏡一体型の光源装置において、前記電力供給線が、口金の端面に沿わせるように反射鏡の光軸に対して略直角に屈曲された後、口金の側面に沿わせるように屈曲されて、その側面に沿わせる部分が口金に装着したサポートによって口金に固定されていることを特徴とする。 To achieve the above object, the present invention is double ended discharge lamp having a pair of electrodes are disposed the optical axis in the reflector, one end of the discharge lamp is fixed to the reflector bottom portion has a cap, reflector In a reflector-integrated light source device having a structure in which a power supply line on the side fixed to the bottom part is connected to an external line near the bottom part of the reflector, the power supply line extends along the end face of the base. After being bent at a substantially right angle to the optical axis of the reflector, it is bent along the side of the base, and the part along the side is fixed to the base by the support attached to the base. Features.

本発明による光源装置は、ダブルエンド型放電灯の反射鏡ボトム部に固定された側の電力供給線が、口金の端面に沿わせるように反射鏡の光軸に対して略直角に屈曲された状態で口金に固定されているから、その電力供給線と外部線の結線を光源装置の奥行きに影響の無いところつまり、反射鏡ボトム部付近で行って、光源装置の小型化、特に短尺化を図ることができる。また、こうした場合、従来は外部線と結線するために電力供給線を折り曲げる必要があり、その際に電力供給線の屈曲部に負荷が掛かるが、この電力供給線を口金の端面に沿わせるように屈曲した状態で口金に固定してから外部線に結線する事により、電力供給線の屈曲部への負荷が大幅に低減し、機械強度的に問題を起こすことはない。また、電力供給線と外部線の結線を反射鏡ボトム部付近で行う事により、光源装置を点灯させるための高電圧と周辺部品の絶縁の問題は生じることはない。 In the light source device according to the present invention, the power supply line on the side fixed to the bottom part of the reflector of the double-end type discharge lamp is bent substantially perpendicular to the optical axis of the reflector so as to be along the end face of the base. from being fixed to the base in a state, where there is no influence of connection of the power supply line and the external line to the depth of the light source device that is, carried out in the vicinity of the reflector bottom portion, miniaturization of the light source apparatus, in particular shortening of Can be planned. In such a case, conventionally, it is necessary to bend the power supply line in order to connect it to the external line . At that time , a load is applied to the bent portion of the power supply line, but this power supply line is made to follow the end face of the base. By fixing to the base in a bent state and then connecting to the external line, the load on the bent portion of the power supply line is greatly reduced, and no problem is caused in mechanical strength. Further, by connecting the power supply line and the external line in the vicinity of the bottom of the reflector, there is no problem of high voltage for lighting the light source device and insulation of peripheral components.

次に本発明の実施例について図1乃至図を用いて説明する。 Next, Embodiment of the present invention will be described with reference to FIGS.

図1は、本発明に係わる光源装置の一実施例を一部省略して示す図である。図において、1は反射鏡4に光軸配置された石英ガラス製のダブルエンド型放電灯で、該放電灯1の両端には電極2a,2bが封止部に埋め込み固定されている。電極2a,2b間距離l、すなわちアーク長は1.0mmである。5は口金、7は受け台、8は電力供給線、9はサポート、10は碍子、11は外部線である。 FIG. 1 is a diagram omitting a part of an embodiment of a light source device according to the present invention. In the figure, reference numeral 1 denotes a quartz glass double-end type discharge lamp arranged on the reflecting mirror 4 on the optical axis , and electrodes 2a and 2b are embedded and fixed in sealing portions at both ends of the discharge lamp 1. The distance 1 between the electrodes 2a and 2b, that is, the arc length is 1.0 mm. 5 is a base, 7 is a cradle, 8 is a power supply line, 9 is a support, 10 is an insulator, and 11 is an external line.

この様にして形成された放電灯1の中には、封入物としてハロゲンガス、Hg、始動用アルゴンが封入されている。なお3a,3bは電極2a、2bに接続されたモリブデン箔で、電力供給線8に接続され、該電力供給線8に結線した外部線11を介して安定器に接続される。 In the discharge lamp 1 formed in this manner, halogen gas, Hg, and starting argon are enclosed as an enclosure. 3a and 3b are molybdenum foils connected to the electrodes 2a and 2b, connected to the power supply line 8, and connected to the ballast via the external line 11 connected to the power supply line 8 .

放電灯1は、ダイクロイック反射鏡4の底部にアルミナ、シリカを主成分とする無機系耐熱接着剤6で口金を介して固定し、光源装置を構成している。そして、反射鏡4の底部に口金を介して固定された側の電力供給線8が、図示のとおり、口金5の端面14に沿わせるように反射鏡4の光軸Xに対して略直角に屈曲された後、口金5の側面15に沿わせるように屈曲されて、その側面15に沿わせる部分が口金5に装着したサポート9によって口金5に固定されている。このように、電力供給線8は、口金5の端面14に沿わせるように反射鏡4の光軸Xに対して略直角に屈曲された状態で口金5に固定されているから、外部線11と結線する際にその屈曲部分に負荷がかかって破断するおそれがない。 The discharge lamp 1 is fixed to the bottom of a dichroic reflector 4 with an inorganic heat resistant adhesive 6 mainly composed of alumina and silica through a base 5 to constitute a light source device. The power supply line 8 on the side fixed to the bottom of the reflecting mirror 4 via the base 5 is substantially perpendicular to the optical axis X of the reflecting mirror 4 so as to be along the end face 14 of the base 5 as shown in the figure. After being bent, the portion is bent along the side surface 15 of the base 5, and the portion along the side surface 15 is fixed to the base 5 by the support 9 attached to the base 5. In this way, the power supply line 8 is fixed to the base 5 while being bent at a substantially right angle with respect to the optical axis X of the reflecting mirror 4 so as to be along the end surface 14 of the base 5. There is no risk of breakage due to a load applied to the bent portion of the wire.

以上の様な光源装置は専用電子安定器を用いて電力150W、で放電灯軸が水平になるように水平点灯する。 The light source device as described above is lit horizontally using a dedicated electronic ballast at a power of 150 W so that the discharge lamp shaft is horizontal.

図2及び図3に示すように、サポート9は、口金5の側面15に装着されると共に、その側面15の周方向に沿って環状に形成された凹溝12内に嵌め止められている。なお、凹12を設けるのはサポートの取り付けをより強固なものとするためである。 As shown in FIGS. 2 and 3, the support 9 is mounted on the side surface 15 of the base 5, and is fitted into a concave groove 12 formed in an annular shape along the circumferential direction of the side surface 15. Incidentally, the provision of the recessed groove 12 is for the attachment of the support 9 and the stronger ones.

図3(a)及び(b)に示すように、口金5の側面15には、その側面15に沿わせるように屈曲された電力供給線8を嵌め入れる凹溝18が形成されている。この凹13を設けるのは電力供給線の動きをより固定するためであり、機械的強度をより向上することができる。 As shown in FIGS. 3A and 3B, the side surface 15 of the base 5 is formed with a concave groove 18 into which the power supply line 8 bent so as to be along the side surface 15 is fitted. This of providing concave groove 13 is for the purpose of further securing the movement of the power supply line 8, it is possible to further improve the mechanical strength.

なお、実施例はショートアーク型の水銀灯としたが、同様な構造を持つメタルハライドランプやキセノンランプでも良い。 The embodiment is a short arc type mercury lamp, but a metal halide lamp or a xenon lamp having a similar structure may be used.

本発明の活用は、主にプロジェクターやプロジェクションTV、映写機などに使用される。 The utilization of the present invention is mainly used for projectors, projection TVs, projectors, and the like.

本発明に係る光源装置の概略断面図Schematic longitudinal sectional view of a light source apparatus according to the present invention 本発明に係る光源装置の一部拡大縦断面図The partially expanded longitudinal cross-sectional view of the light source device which concerns on this invention 本発明に係る光源装置の一部拡大縦面図と口金の背面図1 is a partially enlarged vertical view of a light source device according to the present invention and a rear view of a base. 従来の光源装置の概略縦断面図Schematic longitudinal sectional view of a conventional light source device 従来の光源装置の概略縦断面図Schematic longitudinal sectional view of a conventional light source device 従来の光源装置の一部拡大背面図と一部拡大縦断面図Partially enlarged rear view and partially enlarged longitudinal sectional view of a conventional light source device

符号の説明Explanation of symbols

1・・・放電灯
2a、2b・・・電極
3a、3b・・・モリブデン箔
4・・・反射鏡
5・・・口金
6・・・無機系耐熱接着剤
7・・・受け台
8・・・電力供給線
9・・・サポート
10・・・碍子
11・・・外部線
12・・・凹溝
13・・・凹溝
14・・・口金の端面
15・・・口金の側面
X・・・・反射鏡の光軸
DESCRIPTION OF SYMBOLS 1 ... Discharge lamp 2a, 2b ... Electrode 3a, 3b ... Molybdenum foil 4 ... Reflective mirror 5 ... Base 6 ... Inorganic heat-resistant adhesive 7 ... Base 8 ...・ Power supply line 9 ... support 10 ... insulator 11 ... external line 12 ... concave groove 13 ... concave groove
14 ... End face of the base
15: Side of the base
X ... Optical axis of reflector

Claims (3)

一対の電極を有するダブルエンド型放電灯(1)が反射鏡(4)に光軸配置され、放電灯の一端は口金(5)を有し反射鏡ボトム部に固定され、反射鏡ボトム部に固定された側の電力供給線(8)が、反射鏡ボトム部付近で外部線(11)と結線される構造を持つ反射鏡一体型の光源装置において、前記電力供給線(8)が、口金(5)の端面(14)に沿わせるように反射鏡の光軸(X)に対して略直角に屈曲された後、口金(5)の側面(15)に沿わせるように屈曲されて、その側面(15)に沿わせる部分が口金(5)に装着したサポート(9)によって口金(5)に固定されていることを特徴とする光源装置。 A double-ended discharge lamp (1) having a pair of electrodes is arranged on the reflecting mirror (4) with an optical axis, and one end of the discharge lamp has a base (5) and is fixed to the reflecting mirror bottom part. In the reflector-integrated light source device having a structure in which the fixed power supply line (8) is connected to the external line (11) in the vicinity of the bottom of the reflector, the power supply line (8) is a base. after being bent approximately at right angles to the end face the optical axis of the reflector so that along the (14) in (5) (X), is bent so as to extend along the side surface (15) of the base (5), A light source device characterized in that a portion along the side surface (15) is fixed to the base (5) by a support (9) attached to the base (5) . 前記サポート(9)が、口金(5)の側面(15)に装着されると共に、その側面(15)の周方向に沿って環状に形成された凹溝(12)内に嵌め止められている請求項記載の光源装置。 The support (9) is mounted on the side surface (15) of the base (5) and is fitted into a concave groove (12) formed in an annular shape along the circumferential direction of the side surface (15) . The light source device according to claim 1 . 前記口金(5)の側面(15)に、その側面(15)に沿わせるように屈曲された前記電力供給線(8)を嵌め入れる凹溝(13)が形成されている請求項1又は2記載の光源装置。 A side surface (15) of the mouthpiece (5), its side (15) according to claim bent by said fitted into the power supply line (8) grooves (13) are formed such that along the 1 or 2 The light source device described.
JP2003285061A 2003-08-01 2003-08-01 Light source device Expired - Fee Related JP4069828B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003285061A JP4069828B2 (en) 2003-08-01 2003-08-01 Light source device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003285061A JP4069828B2 (en) 2003-08-01 2003-08-01 Light source device

Publications (3)

Publication Number Publication Date
JP2005056646A JP2005056646A (en) 2005-03-03
JP2005056646A5 JP2005056646A5 (en) 2005-09-02
JP4069828B2 true JP4069828B2 (en) 2008-04-02

Family

ID=34364812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003285061A Expired - Fee Related JP4069828B2 (en) 2003-08-01 2003-08-01 Light source device

Country Status (1)

Country Link
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