JPH1139934A - Light source unit - Google Patents
Light source unitInfo
- Publication number
- JPH1139934A JPH1139934A JP20843597A JP20843597A JPH1139934A JP H1139934 A JPH1139934 A JP H1139934A JP 20843597 A JP20843597 A JP 20843597A JP 20843597 A JP20843597 A JP 20843597A JP H1139934 A JPH1139934 A JP H1139934A
- Authority
- JP
- Japan
- Prior art keywords
- cooling air
- light source
- reflecting mirror
- source unit
- concave
- 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.)
- Granted
Links
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
(57)【要約】
【課題】 前面ガラス等の透光性部材を配した光源ユニ
ットにおいて、発光管上部の冷却と同時に凹面反射鏡の
反射面側に位置するランプ封止部の冷却をも行なう構造
を有する光源ユニットを提供すること。
【解決手段】 凹面反射鏡の頸部に冷却風排風穴を有
し、該凹面反射鏡の前面開口部の下側周縁部に冷却風送
風穴を有し、該凹面反射鏡の前面開口側に位置する該放
電ランプの封止部端部の方向に該送風穴の送風吹出し口
が向いている光源ユニットとする。
(57) [Summary] In a light source unit provided with a translucent member such as a front glass, at the same time as cooling the upper part of the arc tube, the lamp sealing part located on the reflecting surface side of the concave reflecting mirror is also cooled. To provide a light source unit having a structure. SOLUTION: The concave reflector has a cooling air exhaust hole at a neck portion, a cooling air blow hole at a lower peripheral portion of a front opening of the concave reflector, and a cooling air blow hole at a front opening side of the concave reflector. The light source unit is such that the blower outlet of the blower hole faces toward the end of the sealing portion of the discharge lamp.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶プロジェクタ
ー等の投影機器などに使用される光源ユニットに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source unit used for projection equipment such as a liquid crystal projector.
【０００２】[0002]
【従来の技術】液晶プロジェクターなどに使用される光
源ユニットには、光源として、メタルハライドランプや
超高圧水銀ランプといった放電ランプが使用される。こ
の放電ランプの光は凹面反射鏡により集光され、さらに
インテグレータレンズ等の各種光学レンズでスクリーン
での照度が均一になるように工夫され、液晶面に照射さ
れる。2. Description of the Related Art In a light source unit used in a liquid crystal projector or the like, a discharge lamp such as a metal halide lamp or an ultra-high pressure mercury lamp is used as a light source. The light of this discharge lamp is condensed by a concave reflecting mirror, and further devised so that the illuminance on the screen is made uniform by various optical lenses such as an integrator lens, and is applied to the liquid crystal surface.
【０００３】例えば、光源ランプとして使用されるショ
ートアーク型のメタルハライドランプは、点灯時には、
発光管内の圧力が２０〜１５０ａｔｍ程度の動作圧のも
のがあるが、通常使用のランプ寿命の期間内において、
発光管が劣化して放電ランプが破裂する危険性が考えら
れる。[0003] For example, a short arc type metal halide lamp used as a light source lamp,
Although there is an operating pressure in which the pressure in the arc tube is about 20 to 150 atm, during the lamp life period of normal use,
There is a risk that the arc tube deteriorates and the discharge lamp explodes.
【０００４】この破裂対策として、破片が飛散しないよ
うに凹面反射鏡の光照射側に前面ガラス等の透光性部材
を配して光源ユニットを密閉化したものとして特開平５
−２５１０５４号公報が知られている。図１はこのよう
な密閉型の光源ユニットの例である。As a countermeasure against the rupture, a light transmitting unit such as a front glass is disposed on the light irradiation side of the concave reflecting mirror to prevent the fragments from scattering, and the light source unit is sealed.
Japanese Patent No. 2551054 is known. FIG. 1 shows an example of such a sealed light source unit.
【０００５】この例の場合、液晶プロジェクター内で
は、発光管の最高温度領域である発光管上部の温度が特
に高温になり易く、その発光管上部で石英ガラスの失透
現象が起こることがある。発光管を冷却することで発光
管の失透を防ぐものとして、特開平５−１３５７４６号
公報が知られている。これは、送風パイプや送風ノズル
を凹面反射鏡の頸部から凹面反射鏡の反射面側ヘ導入
し、発光管を冷やすというものではあるが、前面ガラス
等の透光性部材を配した光源ユニットにおける冷却方法
については示されていない。In this case, in the liquid crystal projector, the temperature of the upper part of the arc tube, which is the highest temperature region of the arc tube, tends to be particularly high, and the devitrification phenomenon of quartz glass may occur at the upper portion of the arc tube. Japanese Patent Application Laid-Open No. 5-135746 discloses a technique for preventing devitrification of an arc tube by cooling the arc tube. This is to introduce a blower pipe or blower nozzle from the neck of the concave reflector to the reflective surface side of the concave reflector to cool the arc tube, but a light source unit with a translucent member such as a front glass No description is given of the cooling method in the above.
【０００６】また、前面ガラス等の透光性部材を配した
光源ユニットの場合には、凹面反射鏡の反射面側に位置
するランプ封止部は前面ガラス等の内側の囲まれた空間
内に配されて高温になり、ランプ封止部の金属箔部分の
温度が３５０℃を超えると金属箔部分で酸化が起こり、
金属箔が膨脹して封止部でクラック等が発生する恐れが
ある。In the case of a light source unit provided with a light-transmitting member such as a front glass, the lamp sealing portion located on the reflection surface side of the concave reflecting mirror is located inside the enclosed space inside the front glass or the like. If the temperature of the metal foil portion of the lamp sealing portion exceeds 350 ° C., oxidation occurs in the metal foil portion,
There is a possibility that the metal foil expands and cracks or the like occur in the sealing portion.
【０００７】このように、前面ガラス等の透光性部材を
配した光源ユニットでは、囲まれた空間内の発光管の高
温部を効率よく冷却し、かつランプ封止部の箔酸化を防
止するということが要求されている。As described above, in the light source unit having the light-transmitting member such as the front glass, the high-temperature portion of the arc tube in the enclosed space is efficiently cooled, and the oxidation of the foil of the lamp sealing portion is prevented. It is required that.
【０００８】[0008]
【発明が解決しようとする課題】そこで、本発明の目的
は、前面ガラス等の透光性部材を配した光源ユニットに
おいて、発光管上部の冷却と同時に凹面反射鏡の反射面
側に位置するランプ封止部の冷却をも行なう構造を有す
る光源ユニットを提供することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a light source unit having a light-transmitting member such as a front glass, which cools an upper portion of an arc tube and at the same time a lamp positioned on a reflection surface side of a concave reflection mirror. An object of the present invention is to provide a light source unit having a structure that also cools a sealing portion.
【０００９】[0009]
【課題を解決するための手段】上記目的を解決するため
に、凹面反射鏡の頸部に該凹面反射鏡と光軸を一致させ
て両端封止型の放電ランプが固定され、該凹面反射鏡の
前面開口部が透光性材料の前面板あるいはインテグレー
タレンズで覆われて、前記放電ランプが水平あるいは略
水平点灯されて、該放電ランプからの放射光が該凹面反
射鏡の前面開口から放射する光源ユニットにおいて、該
凹面反射鏡の頸部に冷却風排風穴を有し、該凹面反射鏡
の前面開口部の下側周縁部に冷却風送風穴を有し、該凹
面反射鏡の前面開口側に位置する該放電ランプの封止部
端部の方向に該送風穴の送風吹出し口が向いている光源
ユニットとする。In order to solve the above-mentioned object, a discharge lamp sealed at both ends is fixed to the neck of the concave reflector so that the optical axis of the concave reflector is aligned with the optical axis of the concave reflector. Is covered with a front plate or an integrator lens made of a light-transmitting material, and the discharge lamp is lit horizontally or substantially horizontally, so that light emitted from the discharge lamp radiates from the front opening of the concave reflecting mirror. In the light source unit, a cooling air exhaust hole is provided at a neck of the concave reflecting mirror, and a cooling air blowing hole is provided at a lower peripheral portion of a front opening of the concave reflecting mirror. The light source unit has a blower outlet of the blower hole directed toward the end of the sealing portion of the discharge lamp located at the position (1).
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施の形態につい
て図面を用いて説明する。図２は本発明の光源ユニット
の一実施例である。凹面反射鏡７の反射鏡頸部９に放電
ランプ１が挿入され、スリーブ１３および接着剤漏れ止
めキャップ１７等により該凹面反射鏡７と光軸を一致さ
せて接着剤８により固定される。反射鏡開口側に位置す
る外部リード棒６は反射鏡７に貫通穴を設けて反射鏡外
部に出すか、発光管部のそばを通し、反射鏡頸部から反
射鏡外部に出すかされる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment of the light source unit of the present invention. The discharge lamp 1 is inserted into the reflection mirror neck 9 of the concave reflection mirror 7, and the optical axis of the discharge lamp 1 is matched with the concave reflection mirror 7 by the sleeve 13 and the adhesive leakage preventing cap 17, and the discharge lamp 1 is fixed by the adhesive 8. The external lead rod 6 located on the side of the opening of the reflecting mirror is provided with a through hole in the reflecting mirror 7 and is output to the outside of the reflecting mirror, or is passed by the arc tube portion and is output to the outside of the reflecting mirror from the neck of the reflecting mirror.
【００１１】前面ガラス１０は前面ガラス固定枠１６に
例えば接着剤８により固定される。該凹面反射鏡７の前
面開口側の周縁部の下半分に配置する前記前面ガラス固
定枠には冷却風送風穴１２が設けられる。また、反射鏡
の反射鏡頸部９に接合させるスリーブ１３には冷却風排
風穴１５が設けられる。本実施例では冷却風送風穴１２
にパイプ３６が連設されており、送風穴１２の送風吹出
し口１２Ａは反射鏡開口側に位置するランプ封止部４の
端部に向いている。The front glass 10 is fixed to the front glass fixing frame 16 by, for example, an adhesive 8. A cooling air blow hole 12 is provided in the front glass fixing frame disposed in the lower half of the peripheral edge of the concave reflecting mirror 7 on the front opening side. Further, a cooling air exhaust hole 15 is provided in the sleeve 13 which is joined to the reflector neck 9 of the reflector. In this embodiment, the cooling air blowing holes 12 are provided.
A pipe 36 is provided in series, and the blowing outlet 12A of the blowing hole 12 faces the end of the lamp sealing portion 4 located on the side of the reflector opening.
【００１２】通常、光源ユニット３０の使用される液晶
プロジェクター等の投影装置（不図示）では投影装置の
吸気ファンから冷却風を取り入れ、排気ファンから冷却
風を排気することによって、液晶板等の光学系、電源
部、ランプ等を冷却する構成が取られている。そして、
本発明の光源ユニットは前記吸気ファンと前記排気ファ
ンの間の冷却風の流れの経路内に配置されることにより
冷却風が光源ユニット内を通過して該光源ユニットを冷
却するようにして使用される。Normally, a projection device (not shown) such as a liquid crystal projector using the light source unit 30 takes in cooling air from an intake fan of the projection device and exhausts cooling air from an exhaust fan, thereby providing an optical device such as a liquid crystal plate. A configuration for cooling a system, a power supply unit, a lamp, and the like is adopted. And
The light source unit of the present invention is used in such a manner that the cooling air passes through the light source unit to cool the light source unit by being arranged in the flow path of the cooling air between the intake fan and the exhaust fan. You.
【００１３】図２において光源ユニット３０内におい
て、冷却風は冷却風送風穴１２から、反射鏡開口側に位
置するランプ封止部４の端部に向かって矢印の方向に流
れ込み、該ランプ封止部の端部を冷却して、反射鏡７の
表面に当たり該表面に沿っておりて発光管上部を冷却し
て、反射鏡頸部９の冷却風排風穴１５からユニット外部
へ排気される。In FIG. 2, in the light source unit 30, the cooling air flows from the cooling air blow hole 12 in the direction of the arrow toward the end of the lamp sealing part 4 located on the side of the reflector opening, and the lamp sealing is performed. The end of the portion is cooled to hit the surface of the reflecting mirror 7 and to cool the upper part of the arc tube along the surface, and is exhausted from the cooling air exhaust hole 15 of the reflecting mirror neck 9 to the outside of the unit.
【００１４】なお、冷却風排風穴を構成するための反射
鏡頸部９のスリーブ１３や接着剤漏れ止めキャップ１７
については一例であり、スリーブ１３と接着剤漏れ止め
キャップ１７を一体化した部材を使用してもよく、図１
の従来例のように接着剤８で直接反射鏡頸部９に放電ラ
ンプ１を固定した光源ユニットの場合には、冷却風排風
穴１５を凹面反射鏡７の反射鏡頸部９近傍の反射鏡側面
に設けることも可能である。In addition, the sleeve 13 of the reflector neck 9 for forming the cooling air exhaust hole and the adhesive leakage preventing cap 17 are provided.
Is an example, and a member in which the sleeve 13 and the adhesive leak-proof cap 17 are integrated may be used.
In the case of a light source unit in which the discharge lamp 1 is fixed to the reflecting mirror neck 9 directly with the adhesive 8 as in the conventional example, the cooling air exhaust hole 15 is provided near the reflecting mirror neck 9 of the concave reflecting mirror 7. It is also possible to provide on the side.
【００１５】１５０Ｗから３５０Ｗ程度の消費電力の放
電ランプでは、一般的には凹面反射鏡７に硼珪酸ガラス
が使われる。この硼珪酸ガラスの熱膨張率は３２〜３８
×１０-7／℃付近のものが使われている。このガラスは
最高使用温度４６０〜４９０℃、通常使用温度２３０
℃、耐熱衝撃は肉厚３．３ｍｍのガラスでは温度差１６
０℃迄耐える。２５０Ｗの放電ランプでも、焦点距離が
小さく、小型の反射鏡を用いた場合や、３５０Ｗ、４０
０Ｗ程度の高消費電力の放電ランプでは、さらに耐熱性
の優れた低熱膨張率の結晶化ガラスが使われる。熱膨張
率は、４．１×１０-7／℃と小さく、最高使用温度６０
０℃、通常使用温度５００℃、耐熱衝撃は肉厚３．３ｍ
ｍのガラスでは温度差４００℃迄耐える。In a discharge lamp having a power consumption of about 150 W to 350 W, borosilicate glass is generally used for the concave reflecting mirror 7. The borosilicate glass has a coefficient of thermal expansion of 32 to 38.
Those having a density of around × 10 -7 / ° C are used. This glass has a maximum operating temperature of 460 to 490 ° C, and a normal operating temperature of 230.
° C, the thermal shock is a temperature difference of 16 mm for glass with a thickness of 3.3 mm.
Withstands up to 0 ° C. Even a 250 W discharge lamp has a small focal length and a small reflector, or a 350 W, 40 W discharge lamp.
In a discharge lamp having a high power consumption of about 0 W, crystallized glass having a further excellent heat resistance and a low coefficient of thermal expansion is used. The coefficient of thermal expansion is as low as 4.1 × 10 -7 / ° C, and the maximum operating temperature is 60.
0 ° C, normal operating temperature 500 ° C, thermal shock resistance is 3.3m
m glass can withstand a temperature difference of up to 400 ° C.
【００１６】また、凹面反射鏡の反射面には、耐熱性４
５０℃程度のＳｉＯ2とＴｉＯ2の多層膜蒸着などが施さ
れることもある。前面ガラス１０は硼珪酸ガラスが一般
的に使用される。取り付け方については発光管が破裂す
る場合を想定して、発光管破裂時の瞬時的な力で、外れ
ないように止め具を用いるとか、反射鏡７と前面ガラス
固定枠１６で接合構造にし、光源ユニット３０を収納す
るユニット枠（図３の記号１９）内面で同ユニット枠１
９に前面ガラス固定枠１６を突き当てる構造とすること
で、外れないようにするとか、耐熱性の接着剤で固定す
るなど各種方法が考えられる。なお、前面ガラス１０に
代えて、インテグレータレンズを配置することも可能で
ある。The reflecting surface of the concave reflecting mirror has a heat resistance of 4.
A multilayer film deposition of SiO 2 and TiO 2 at about 50 ° C. may be performed. As the front glass 10, borosilicate glass is generally used. Regarding how to attach, assuming that the arc tube ruptures, using a stopper so as not to come off with an instantaneous force at the time of arc tube rupture, or joining the reflector 7 and the front glass fixing frame 16 to a joint structure, On the inner surface of the unit frame (symbol 19 in FIG. 3) for housing the light source unit 30,
Various methods are conceivable, such as a structure in which the front glass fixing frame 16 is abutted against 9 so that the front glass fixing frame 16 does not come off or is fixed with a heat-resistant adhesive. In addition, it is also possible to arrange an integrator lens instead of the front glass 10.
【００１７】図３は本発明の他の実施例の断面図を示
す。光源ユニット３０はユニット枠１９に反射鏡保持台
１８を介して保持されている。該反射鏡保持台１８内部
には光源ユニット３０の内部を冷却する冷却風を送風す
るための冷却風送風穴が造り込まれている。FIG. 3 shows a sectional view of another embodiment of the present invention. The light source unit 30 is held on the unit frame 19 via the reflector holder 18. A cooling air blow hole for blowing cooling air for cooling the inside of the light source unit 30 is formed inside the reflector holding base 18.
【００１８】図３のＡ−Ａ’面の矢視図を図４に示す。
１２は該反射鏡保持台１８内部に造り込まれている冷却
風送風穴を示している。冷却風送風穴の吹出し口１２Ａ
は凹面反射鏡の前面開口側に位置する該放電ランプの封
止部端部の方向に向いている。FIG. 4 is a view taken along the line AA 'in FIG.
Reference numeral 12 denotes a cooling air blow hole formed inside the reflector holding base 18. Cooling air blow hole outlet 12A
Is directed toward the end of the sealing portion of the discharge lamp located on the front opening side of the concave reflecting mirror.
【００１９】冷却風は該冷却風送風穴１２から、反射鏡
開口側に位置するランプの封止部端部に向いて流れ込
み、該封止部端部を冷却して、反射鏡７の表面に沿って
下りおりて発光管上部を冷却し、また、反射鏡頸部９の
冷却風排風穴１５からユニット外部へ排気される。The cooling air flows from the cooling air blow hole 12 toward the end of the sealed portion of the lamp located on the opening side of the reflecting mirror, cools the end of the sealed portion, and flows on the surface of the reflecting mirror 7. It cools down along the upper part of the arc tube, and is exhausted to the outside of the unit through the cooling air vent hole 15 of the neck portion 9 of the reflecting mirror.
【００２０】この例においては冷却風排風については、
ランプ破裂が仮に起こった場合の破裂音の消音の工夫と
して、スリーブ１３をベース取付け部となる筒部の周囲
に隙間を形成するように前記筒部の外径より大きい内径
を有する筒部を設け、複数個の穴が互い違いに開けられ
た仕切壁により、隙間が多段構造になる構造にすること
で、長い通風経路を構成して、凹面反射鏡内からの排風
がスリーブ内の前記通風経路を巡り冷却風排風穴１５か
らユニット外部へ排気されるようになっている。また、
冷却風送風穴１２も同様に消音の工夫として反射鏡保持
台１８の内部で長い経路を有するようにしている。In this example, the cooling air exhaust air
As a device for silencing the bursting sound in the event of a lamp burst, a cylindrical portion having an inner diameter larger than the outer diameter of the cylindrical portion is provided so that the sleeve 13 forms a gap around the cylindrical portion serving as the base mounting portion. By forming a structure in which the gap is formed in a multi-stage structure by a partition wall in which a plurality of holes are alternately formed, a long ventilation path is formed, and exhaust air from inside the concave reflecting mirror passes through the ventilation path in the sleeve. And the air is exhausted from the cooling air exhaust hole 15 to the outside of the unit. Also,
Similarly, the cooling air blow hole 12 has a long path inside the reflector holding base 18 as a means of silencing.
【００２１】なお、冷却風排風穴１５は反射鏡頸部９に
設けると同時に凹面反射鏡の前面開口部の下側周縁部に
も設けてもよい。The cooling air exhaust hole 15 may be provided in the neck portion 9 of the reflecting mirror and also at the lower peripheral edge of the front opening of the concave reflecting mirror.
【００２２】次に、本発明の光源ユニットにおいて、冷
却風の送風条件を変えて光源ユニット内の放電ランプの
発光管上部、発光管下部および封止部端部の温度を測定
した。実験条件は以下のとおりである。Next, in the light source unit of the present invention, the temperature of the upper portion of the discharge lamp, the lower portion of the discharge tube, and the end of the sealing portion of the discharge lamp in the light source unit were measured while changing the blowing condition of the cooling air. The experimental conditions are as follows.
【００２３】 ＜冷却実験の実験条件＞ 使用ランプ：消費電力２００Ｗの直流点灯形石英発光管のメタルハライド ランプ 発光管外径：１４ｍｍ（内径１０．４ｍｍ） 封入物：水銀、アルゴン、希土類ハロゲン化物 凹面反射鏡：硼珪酸ガラス製で内面の反射面は耐熱性４５０℃程度のＳｉ Ｏ2とＴｉＯ2の多層膜蒸着によるコールドミラー 前面開口の直径：８５ｍｍ 肉厚：４ｍｍ 冷却風量：０．００６ｍ3／ｍｉｎ<Experimental conditions of cooling experiment> Lamp used: Metal halide lamp of DC lighting type quartz arc tube with power consumption of 200 W Outer diameter of arc tube: 14 mm (10.4 mm inner diameter) Filler: Mercury, argon, rare earth halide Concave reflection mirror: borosilicate reflecting surface of the glass in the inner surface of the cold mirror front opening by multilayer deposition of Si O 2 and TiO 2 of about heat resistance 450 ° C. diameter: 85 mm wall thickness: 4 mm cooling air volume: 0.006 m 3 / min
【００２４】ここでの冷却実験において、図２に示した
冷却風送風穴１２にパイプ３６が連設された光源ユニッ
トにおいては、図５に示すようにＤＣフラットファン３
２からの冷却風をエアータンク３４に導入し、送風チュ
ーブ３５とパイプ３６を介して冷却風送風穴１２から光
源ユニット３０へ送風し、反射鏡頸部９の排風穴１５か
ら排出した。このとき、冷却風送風側（Ａ）の圧力と冷
却風排風側（Ｂ）の圧力差は２ｍｍＨ2Ｏであった。そ
して、冷却風送風穴１２は反射鏡下側に２個所設けて冷
却風を導入した場合と、冷却風送風穴を図２とは上下逆
に反射鏡上部に２個所設けて冷却風を導入した場合で放
電ランプの反射鏡開口側の封止部端部温度と発光管上部
温度と発光管下部温度がどのようになるか測定した。In the cooling experiment, in the light source unit in which the pipe 36 is connected to the cooling air blow hole 12 shown in FIG. 2, the DC flat fan 3 is used as shown in FIG.
The cooling air from 2 was introduced into the air tank 34, blown from the cooling air blow hole 12 to the light source unit 30 through the blow tube 35 and the pipe 36, and was discharged from the air discharge hole 15 of the reflector neck 9. At this time, the pressure difference between the cooling air blowing side (A) and the cooling air discharging side (B) was 2 mmH 2 O. Two cooling air blowing holes 12 are provided below the reflecting mirror to introduce cooling air, and two cooling air blowing holes are provided in the upper part of the reflecting mirror upside down in FIG. 2 to introduce cooling air. In each case, the temperature of the end portion of the sealing portion on the opening side of the reflector of the discharge lamp, the upper temperature of the arc tube, and the lower temperature of the arc tube were measured.
【００２５】温度測定は、φ０．２ｍｍの線径のＫ熱電
対を使用した。発光管上部および下部の温度はいずれも
前記熱電対を発光管上部および下部に接触させた状態で
少量の無機接着剤で固定してランプを点灯させ、熱電対
の出力を温度換算した。ランプ封止部端部の温度測定で
は、封止管外部から切り込みをいれ、外部リード棒と金
属箔のスポット溶接部の中央部のところに前記熱電対を
挿入して熱電対が外部リード棒と接触するようにして少
量の無機接着剤で固定してランプを点灯させた。表１に
測定結果を示す。For the temperature measurement, a K thermocouple having a wire diameter of φ0.2 mm was used. Regarding the temperature of the upper and lower portions of the arc tube, the lamp was turned on with the thermocouple in contact with the upper and lower portions of the arc tube with a small amount of an inorganic adhesive, and the output of the thermocouple was converted into temperature. In the temperature measurement of the end portion of the lamp sealing portion, a cut is made from the outside of the sealing tube, and the thermocouple is inserted at the center of the spot welding portion between the external lead rod and the metal foil, and the thermocouple is connected to the external lead rod. The lamp was turned on by fixing with a small amount of inorganic adhesive so as to make contact. Table 1 shows the measurement results.
【００２６】[0026]
【表１】 [Table 1]
【００２７】同様にして、冷却風送風穴１２を図３およ
び図４に示すように反射鏡下側に２個所設けて、該冷却
風送風穴から冷却風を導入した場合と、冷却風送風穴を
図４とは上下逆に反射鏡上部に２個所設けて冷却風を導
入した場合で放電ランプの反射鏡開口側の封止部端部温
度と発光管上部温度と発光管下部温度がどのようになる
か測定した。その結果を表２に示す。なお、図３および
図４の例では、凹面反射鏡頸部９あるいはスリーブ１３
に冷却風排風穴１５は冷却風の経路を作る上で必要であ
る。Similarly, two cooling air blowing holes 12 are provided below the reflecting mirror as shown in FIGS. 3 and 4 so that cooling air is introduced from the cooling air blowing holes. In the case where cooling air is introduced by providing two locations in the upper part of the reflecting mirror upside down from FIG. Was measured. Table 2 shows the results. In the examples shown in FIGS. 3 and 4, the concave reflecting mirror neck 9 or the sleeve 13 is used.
In addition, the cooling air exhaust hole 15 is necessary for forming a cooling air path.
【００２８】[0028]
【表２】 [Table 2]
【００２９】表１、表２からわかるように、反射鏡下側
に冷却風送風穴を設けて、該冷却風送風穴から冷却風を
導入し反射鏡頸部の冷却風送風穴より排気した場合に
は、ランプ封止部端部温度を箔酸化の心配のない温度域
まで下げることができると同時に発光管上部の温度を失
透現象が起きない温度域までも下げることができた。し
かし、反射鏡上側に冷却風送風穴を設けた場合は発光管
下部は冷却されるが、ランプ封止部端部や発光管上部は
十分な冷却ができなかった。As can be seen from Tables 1 and 2, a cooling air blowing hole is provided below the reflecting mirror, cooling air is introduced from the cooling air blowing hole, and exhausted from the cooling air blowing hole in the neck of the reflecting mirror. In the method, the temperature of the end portion of the lamp sealing portion could be reduced to a temperature range where there is no fear of oxidation of the foil, and at the same time, the temperature of the upper portion of the arc tube could be lowered to a temperature range where devitrification does not occur. However, when a cooling air blow hole is provided on the upper side of the reflecting mirror, the lower part of the arc tube is cooled, but the end of the lamp sealing portion and the upper portion of the arc tube cannot be sufficiently cooled.
【００３０】[0030]
【発明の効果】以上、説明したように本発明の冷却風送
風穴、排風穴を有する光源ユニットとすることによっ
て、発光管上部の冷却と同時に凹面反射鏡の前面開口側
に位置するランプ封止部の冷却をも可能となった。As described above, the light source unit having the cooling air blowing holes and the air discharging holes according to the present invention allows the lamp sealing located on the front opening side of the concave reflector at the same time as the cooling of the upper part of the arc tube. It became possible to cool the part.
【図１】 従来例の光源ユニットの断面図を示す。FIG. 1 shows a cross-sectional view of a light source unit of a conventional example.
【図２】 本発明の光源ユニットの一実施例の断面図を
示す。FIG. 2 shows a sectional view of one embodiment of the light source unit of the present invention.
【図３】 本発明の光源ユニットの他の実施例の断面図
を示す。FIG. 3 shows a sectional view of another embodiment of the light source unit of the present invention.
【図４】 図３のＡ−Ａ’矢視図を示す。FIG. 4 is a view taken in the direction of arrows A-A ′ in FIG. 3;
【図５】 冷却実験の冷却風導入の構成図を示す。FIG. 5 shows a configuration diagram of introducing cooling air in a cooling experiment.
１ 放電ランプ ２ 発光管 ３ 電極 ４ ランプ封止部 ５ 金属箔 ６ 外部リード棒 ７ 凹面反射鏡 ８ 接着剤 ９ 反射鏡頸部 １０ 前面ガラス １１ 低融点ガラス １２ 冷却風送風穴 １２Ａ 送風吹出し口 １３ スリーブ １４ ベース １５ 冷却風排風穴 １６ 前面ガラス固定枠 １７ 接着剤漏れ止めキャップ １８ 反射鏡保持台 １９ ユニット枠 ３０ 光源ユニット ３１ 給電線 ３２ ＤＣフラットファン ３３ ファン取付け台 ３４ エアータンク ３５ 送風チューブ ３６ パイプ DESCRIPTION OF SYMBOLS 1 Discharge lamp 2 Arc tube 3 Electrode 4 Lamp sealing part 5 Metal foil 6 External lead rod 7 Concave reflector 8 Adhesive 9 Reflector neck 10 Front glass 11 Low melting point glass 12 Cooling air blow hole 12A Blow air outlet 13 Sleeve 14 Base 15 Cooling air exhaust hole 16 Front glass fixing frame 17 Adhesive leak-proof cap 18 Reflector holder 19 Unit frame 30 Light source unit 31 Power supply line 32 DC flat fan 33 Fan mount 34 Air tank 35 Ventilation tube 36 Pipe
Claims (1)
を一致させて両端封止型の放電ランプが固定され、該凹
面反射鏡の前面開口部が透光性材料の前面板あるいはイ
ンテグレータレンズで覆われて、前記放電ランプが水平
あるいは略水平点灯されて、該放電ランプからの放射光
が該凹面反射鏡の前面開口から放射される光源ユニット
において、 該凹面反射鏡の頸部に冷却風排風穴を有し、該凹面反射
鏡の前面開口部の下側周縁部に冷却風送風穴を有し、該
凹面反射鏡の前面開口側に位置する該放電ランプの封止
部端部の方向に該送風穴の送風吹出し口が向いているこ
とを特徴とする光源ユニット。1. A discharge lamp of both ends sealed type is fixed to the neck of a concave reflecting mirror so that the optical axis of the concave reflecting mirror coincides with the optical axis of the concave reflecting mirror, and the front opening of the concave reflecting mirror has a front plate made of a translucent material. Alternatively, in a light source unit in which the discharge lamp is lit horizontally or substantially horizontally by being covered with an integrator lens and light emitted from the discharge lamp is emitted from a front opening of the concave reflector, a neck of the concave reflector is provided. An end of a sealing portion of the discharge lamp, which has a cooling air blowing hole at a lower peripheral portion of a front opening of the concave reflecting mirror and has a cooling air blowing hole at a front opening side of the concave reflecting mirror. A light source unit characterized in that the blower outlet of the blower hole faces in the direction of the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20843597A JP3381566B2 (en) | 1997-07-18 | 1997-07-18 | Light source unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20843597A JP3381566B2 (en) | 1997-07-18 | 1997-07-18 | Light source unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1139934A true JPH1139934A (en) | 1999-02-12 |
| JP3381566B2 JP3381566B2 (en) | 2003-03-04 |
Family
ID=16556170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20843597A Expired - Lifetime JP3381566B2 (en) | 1997-07-18 | 1997-07-18 | Light source unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3381566B2 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001125195A (en) * | 1999-10-27 | 2001-05-11 | Hitachi Ltd | Light source device and display device using the same |
| WO2001040861A1 (en) * | 1999-12-02 | 2001-06-07 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp and lamp device |
| US6443575B1 (en) | 1999-08-26 | 2002-09-03 | Mitsubishi Denki Kabushiki Kaisha | Projector with inlet fan, outlet fan and ventilation duct structure for cooling an optical system |
| US6509674B1 (en) * | 1998-10-30 | 2003-01-21 | Phoenix Electric Co., Ltd. | Discharge lamp with ventilation passage |
| GB2412158A (en) * | 2004-03-15 | 2005-09-21 | Osram Sylvania Inc | A reflector lamp with reduced seal temperature |
| EP1253372A3 (en) * | 2001-04-27 | 2007-05-02 | General Electric Company | Discharge lamp having improved shield |
| CN100385607C (en) * | 2002-07-11 | 2008-04-30 | 皇家飞利浦电子股份有限公司 | Lamp assembly with cooling device |
| US7380965B2 (en) | 2004-09-17 | 2008-06-03 | Canon Kabushiki Kaisha | Light source apparatus, optical apparatus, and image projection apparatus |
| JP2008186606A (en) * | 2007-01-26 | 2008-08-14 | Hamamatsu Photonics Kk | Light source device |
| US7762674B2 (en) | 2005-01-25 | 2010-07-27 | Canon Kabushiki Kaisha | Projection-type display device |
| JP2011070833A (en) * | 2009-09-24 | 2011-04-07 | Orc Manufacturing Co Ltd | Lighting system equipped with wind protection member |
| JP2011075670A (en) * | 2009-09-29 | 2011-04-14 | Olympus Corp | Endoscope |
| JP2011181243A (en) * | 2010-02-26 | 2011-09-15 | Panasonic Electric Works Co Ltd | Lighting apparatus |
| JP2015082031A (en) * | 2013-10-23 | 2015-04-27 | 株式会社リコー | Light projection device |
| JP2016014894A (en) * | 2015-09-29 | 2016-01-28 | セイコーエプソン株式会社 | projector |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6509674B1 (en) * | 1998-10-30 | 2003-01-21 | Phoenix Electric Co., Ltd. | Discharge lamp with ventilation passage |
| US6443575B1 (en) | 1999-08-26 | 2002-09-03 | Mitsubishi Denki Kabushiki Kaisha | Projector with inlet fan, outlet fan and ventilation duct structure for cooling an optical system |
| JP2001125195A (en) * | 1999-10-27 | 2001-05-11 | Hitachi Ltd | Light source device and display device using the same |
| WO2001040861A1 (en) * | 1999-12-02 | 2001-06-07 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp and lamp device |
| US6784601B2 (en) | 1999-12-02 | 2004-08-31 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp including heat releasing device and lamp device |
| EP1253372A3 (en) * | 2001-04-27 | 2007-05-02 | General Electric Company | Discharge lamp having improved shield |
| CN100385607C (en) * | 2002-07-11 | 2008-04-30 | 皇家飞利浦电子股份有限公司 | Lamp assembly with cooling device |
| GB2412158A (en) * | 2004-03-15 | 2005-09-21 | Osram Sylvania Inc | A reflector lamp with reduced seal temperature |
| US7125149B2 (en) | 2004-03-15 | 2006-10-24 | Osram Sylvania Inc. | Reflector lamp with reduced seal temperature |
| GB2412158B (en) * | 2004-03-15 | 2007-09-12 | Osram Sylvania Inc | Reflector lamp with reduced seal temperature |
| US7380965B2 (en) | 2004-09-17 | 2008-06-03 | Canon Kabushiki Kaisha | Light source apparatus, optical apparatus, and image projection apparatus |
| US7891846B2 (en) | 2004-09-17 | 2011-02-22 | Canon Kabushiki Kaisha | Light source apparatus, optical apparatus, and image projection apparatus |
| US7762674B2 (en) | 2005-01-25 | 2010-07-27 | Canon Kabushiki Kaisha | Projection-type display device |
| JP2008186606A (en) * | 2007-01-26 | 2008-08-14 | Hamamatsu Photonics Kk | Light source device |
| US7988312B2 (en) | 2007-01-26 | 2011-08-02 | Hamamatsu Photonics K.K. | Light source apparatus with reflector gas-blasting structure |
| JP2011070833A (en) * | 2009-09-24 | 2011-04-07 | Orc Manufacturing Co Ltd | Lighting system equipped with wind protection member |
| JP2011075670A (en) * | 2009-09-29 | 2011-04-14 | Olympus Corp | Endoscope |
| JP2011181243A (en) * | 2010-02-26 | 2011-09-15 | Panasonic Electric Works Co Ltd | Lighting apparatus |
| JP2015082031A (en) * | 2013-10-23 | 2015-04-27 | 株式会社リコー | Light projection device |
| JP2016014894A (en) * | 2015-09-29 | 2016-01-28 | セイコーエプソン株式会社 | projector |
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