JP2001332213A - High-pressure mercury lamp, illuminating optical equipment using the mercury lamp, and image display apparatus using the optical equipment - Google Patents
High-pressure mercury lamp, illuminating optical equipment using the mercury lamp, and image display apparatus using the optical equipmentInfo
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- JP2001332213A JP2001332213A JP2000152406A JP2000152406A JP2001332213A JP 2001332213 A JP2001332213 A JP 2001332213A JP 2000152406 A JP2000152406 A JP 2000152406A JP 2000152406 A JP2000152406 A JP 2000152406A JP 2001332213 A JP2001332213 A JP 2001332213A
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- mercury lamp
- pressure mercury
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- reinforcing member
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一般照明や光学機
器等に用いられる高圧水銀ランプ、この高圧水銀ランプ
を用いた照明光学装置、およびこの照明光学装置を用い
た画像表示装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure mercury lamp used for general lighting and optical equipment, an illumination optical device using the high-pressure mercury lamp, and an image display device using the illumination optical device. .
【０００２】[0002]
【従来の技術】従来、液晶プロジェクタ等の画像表示装
置に用いられている照明光学装置においては、通常、光
源と凹面反射鏡とが一体化されている。そして、その光
源には、効率が良く、高輝度であり、放射光における
赤、青、緑のバランスが良く、長寿命である等の点から
点光源に近いショートアークの超高圧水銀ランプがよく
用いられている。2. Description of the Related Art Conventionally, in an illumination optical device used for an image display device such as a liquid crystal projector, a light source and a concave reflecting mirror are usually integrated. As the light source, a short arc ultra-high pressure mercury lamp, which is close to a point light source in terms of efficiency, high brightness, good balance of red, blue, and green in emitted light, and long life, is often used. Used.
【０００３】このような超高圧水銀ランプは、発光部と
この発光部の両端部に設けられた封止部とを有する発光
管を備えている。発光部内には、先端部にコイルが取り
付けられた電極軸部を有し、かつタングステンを主成分
とする電極が設けられている。また、発光部内には、発
光金属としての水銀、始動ガスとしての不活性ガスの他
に、微量のハロゲンガスがそれぞれ封入されている。[0003] Such an ultra-high pressure mercury lamp includes an arc tube having a light emitting portion and sealing portions provided at both ends of the light emitting portion. In the light emitting portion, an electrode having an electrode shaft portion to which a coil is attached at a tip portion, and an electrode mainly containing tungsten is provided. In addition, a small amount of halogen gas is sealed in the light emitting portion in addition to mercury as a light emitting metal and an inert gas as a starting gas.
【０００４】このように超高圧水銀ランプでは、一般的
に、ハロゲンガスを封入してハロゲンサイクルを利用す
ることにより、長寿命化が図られている。ところが、発
光部内に不純物（カリウム、ナトリウム、リチウム等）
が存在すると、ハロゲンサイクルが阻害されてしまい、
寿命が短くなってしまう。そのため、発光部の放電空間
中はもちろんのこと、電極中のタングステン以外の不純
物も極力取り除かれている。[0004] As described above, in the ultrahigh-pressure mercury lamp, generally, the life is extended by enclosing a halogen gas and using a halogen cycle. However, impurities (potassium, sodium, lithium, etc.)
If present, the halogen cycle is inhibited,
Life will be shortened. Therefore, impurities other than tungsten in the electrode as well as in the discharge space of the light emitting section are removed as much as possible.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の超高圧水銀ランプでは、不純物が極めて少な
い電極を用いた結果、製造工程時、具体的には発光管の
封止部の形成時に、電極が高温で加熱されて容易に再結
晶化してしまい、そのため電極の機械的強度が著しく低
下して、電極軸部にクラックが発生し、場合によっては
電極軸部が折損してしまうという問題があった。However, in such a conventional ultra-high pressure mercury lamp, the use of an electrode having a very small amount of impurities results in the production process, specifically, the formation of the sealing portion of the arc tube. The electrode is heated at a high temperature and easily recrystallized, which causes a problem that the mechanical strength of the electrode is remarkably reduced, cracks are generated in the electrode shaft, and in some cases, the electrode shaft is broken. there were.
【０００６】また、電極軸部にクラックが発生した電極
も、点灯中、その熱の影響によって折損してしまう。Also, an electrode having a crack in the electrode shaft portion is broken by the influence of heat during lighting.
【０００７】本発明は、このような問題を解決するため
になされたもので、特に、不純物が極めて少なく、かつ
タングステンを主成分とする電極を用いた場合におい
て、その電極が製造工程時または点灯中に折損するのを
防止することができる信頼性の高い高圧水銀ランプ、こ
の高圧水銀ランプを用いた照明光学装置、およびこの照
明光学装置を用いた画像表示装置を提供することを目的
とする。The present invention has been made to solve such a problem. In particular, in the case where an electrode containing extremely few impurities and containing tungsten as a main component is used, the electrode may be used during the manufacturing process or during lighting. It is an object of the present invention to provide a highly reliable high-pressure mercury lamp capable of preventing breakage inside, an illumination optical device using the high-pressure mercury lamp, and an image display device using the illumination optical device.
【０００８】[0008]
【課題を解決するための手段】本発明の請求項１記載の
高圧水銀ランプは、内部に電極が設けられるとともに、
水銀、不活性ガスおよびハロゲンガスが封入された発光
部と、この発光部の両端部に設けられた封止部とを有す
る発光管を備え、前記電極の電極軸部が補強部材で囲繞
されている構成を有している。According to a first aspect of the present invention, there is provided a high-pressure mercury lamp having electrodes therein.
A light-emitting tube having a light-emitting portion in which mercury, an inert gas, and a halogen gas are sealed, and sealing portions provided at both ends of the light-emitting portion; an electrode shaft portion of the electrode is surrounded by a reinforcing member; It has a configuration that
【０００９】本発明の請求項２記載の高圧水銀ランプ
は、前記電極軸部の成分がタングステンを主成分とし、
カリウム、鉄、アルミニウム、カルシウム、クロム、モ
リブデン、ニッケル、およびケイ素を含む副成分の総含
有量が４０ｐｐｍ以下、かつ前記カリウムの含有量が１
０ｐｐｍ以下、前記鉄の含有量が１５ｐｐｍ以下である
構成を有している。In a high-pressure mercury lamp according to a second aspect of the present invention, the component of the electrode shaft portion is mainly composed of tungsten,
The total content of subcomponents including potassium, iron, aluminum, calcium, chromium, molybdenum, nickel, and silicon is 40 ppm or less, and the content of potassium is 1
It has a configuration in which the content of iron is 0 ppm or less and the content of iron is 15 ppm or less.
【００１０】また、本発明の請求項３記載の高圧水銀ラ
ンプは、前記補強部材がパイプ状またはコイル状である
構成を有している。The high-pressure mercury lamp according to claim 3 of the present invention has a configuration in which the reinforcing member has a pipe shape or a coil shape.
【００１１】また、本発明の請求項４記載の高圧水銀ラ
ンプは、前記補強部材がモリブデン、タングステン、レ
ニウムまたはイリジウムを主成分とする構成を有してい
る。Further, in the high-pressure mercury lamp according to claim 4 of the present invention, the reinforcing member has a configuration in which molybdenum, tungsten, rhenium or iridium is a main component.
【００１２】本発明の請求項５記載の高圧水銀ランプ
は、前記電極軸部の外径をＲ（ｍｍ）、パイプ状の前記
補強部材の肉厚をｒ1（ｍｍ）とした場合、１／３０Ｒ
≦ｒ1≦１／２Ｒなる関係式を満たす構成を有してい
る。In the high-pressure mercury lamp according to a fifth aspect of the present invention, when the outer diameter of the electrode shaft is R (mm) and the thickness of the pipe-shaped reinforcing member is r 1 (mm), 1 / mm. 30R
It has a configuration that satisfies the relational expression of ≦ r 1 ≦ １ ／ R.
【００１３】本発明の請求項６記載の高圧水銀ランプ
は、前記電極軸部の外径をＲ（ｍｍ）、コイル状の前記
補強部材の線径をｒ2（ｍｍ）とした場合、１／１０Ｒ
≦ｒ2≦３／４Ｒなる関係式を満たす構成を有してい
る。In the high-pressure mercury lamp according to claim 6 of the present invention, when the outer diameter of the electrode shaft is R (mm) and the wire diameter of the coil-shaped reinforcing member is r 2 (mm), 1 / 10R
≦ r 2 ≦ 3 / 4R.
【００１４】これらの構成により、電極の機械的強度が
低下しても、その電極の機械的強度の低下を補強部材に
よって補うことができるので、電極、つまり電極軸部が
製造工程時または点灯中に折損するのを防止することが
できる。According to these configurations, even if the mechanical strength of the electrode is reduced, the reduction in the mechanical strength of the electrode can be compensated for by the reinforcing member. Can be prevented from being broken.
【００１５】また、本発明の高圧水銀ランプは、電極軸
部の成分がタングステンを主成分とし、カリウム、鉄、
アルミニウム、カルシウム、クロム、モリブデン、ニッ
ケル、およびケイ素を含む副成分の総含有量が４０ｐｐ
ｍ以下、かつカリウムの含有量が１０ｐｐｍ以下、鉄の
含有量が１５ｐｐｍ以下である電極を用いた場合に、そ
の効果を特に発揮することができる。Further, in the high-pressure mercury lamp of the present invention, the component of the electrode shaft portion is mainly composed of tungsten, and potassium, iron,
The total content of sub-components including aluminum, calcium, chromium, molybdenum, nickel and silicon is 40 pp
The effect can be particularly exerted when an electrode having a content of potassium of 10 ppm or less and an iron content of 15 ppm or less is used.
【００１６】なお、ここでいう「主成分」とは含有率が
９９．９％以上１００％以下と定義する（以下、同
じ）。The "main component" is defined as having a content of 99.9% or more and 100% or less (the same applies hereinafter).
【００１７】また、本発明の請求項７記載の照明光学装
置は、請求項１〜請求項６のいずれかに記載の高圧水銀
ランプと、放物面または楕円面からなる反射面を有する
反射鏡とが一体化されている構成を有している。According to a seventh aspect of the present invention, there is provided an illumination optical device, comprising: a high-pressure mercury lamp according to any one of the first to sixth aspects; and a reflecting mirror having a parabolic or elliptical reflecting surface. Are integrated.
【００１８】これにより、高いランプ効率、高い演色
性、および長寿命を維持しつつ、信頼性の高い照明光学
装置を得ることができる。Thus, a highly reliable illumination optical device can be obtained while maintaining high lamp efficiency, high color rendering, and long life.
【００１９】さらに、本発明の請求項８記載の照明光学
装置は、光源部と、前記光源部より放射された光を集光
する集光部と、前記集光部より集光された光を投射する
投射レンズ系と、前記投射レンズ系より投射された光が
映し出されるスクリーンとを備え、前記光源部に請求項
７記載の照明光学装置を用いている。The illumination optical device according to the present invention may further comprise a light source unit, a light condensing unit for condensing light emitted from the light source unit, and a light condensing unit for condensing the light condensed from the light collecting unit. A projection lens system for projecting and a screen on which light projected from the projection lens system is projected, and the illumination optical device according to claim 7 is used for the light source unit.
【００２０】これにより、高いランプ効率、高い演色
性、および長寿命を維持しつつ、信頼性の高い画像表示
装置を得ることができる。As a result, it is possible to obtain a highly reliable image display device while maintaining high lamp efficiency, high color rendering, and long life.
【００２１】[0021]
【発明の実施の形態】本発明の第１の実施の形態である
ランプ電力１５０Ｗの超高圧水銀ランプ、この超高圧水
銀ランプを用いた照明光学装置、およびこの照明光学装
置を用いた画像表示装置について、図面を用いて説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An ultra-high pressure mercury lamp with a lamp power of 150 W according to a first embodiment of the present invention, an illumination optical device using the ultra-high pressure mercury lamp, and an image display device using the illumination optical device Will be described with reference to the drawings.
【００２２】図１に示すように、超高圧水銀ランプは、
石英ガラスからなる発光管１を備えている。この発光管
１は、略回転楕円体形状で、かつ中央部の最大内径が
５．３ｍｍ、内容積が０．１０ｍｍ3、肉厚が２．６ｍ
ｍである発光部２と、この発光部２の両端部に設けられ
た封止部３とを有している。As shown in FIG. 1, the ultra-high pressure mercury lamp is
An arc tube 1 made of quartz glass is provided. The arc tube 1 has a substantially spheroidal shape, a maximum inner diameter of 5.3 mm at the center, an inner volume of 0.10 mm 3 , and a wall thickness of 2.6 m.
The light-emitting unit 2 includes a light-emitting unit 2 and a sealing unit 3 provided at both ends of the light-emitting unit 2.
【００２３】発光部２内の両端部には、電極４が設けら
れている。この電極４の電極間距離は１．２ｍｍであ
る。また、発光部２内には、発光金属としての水銀が１
７．５ｍｇ（約０．１７５ｍｇ／ｍｍ3、安定点灯時の
水銀蒸気圧：１７．５ＭＰａ）、ハロゲンガスとして臭
素が１．２×１０-4μｍｏｌ／ｍｍ3、および始動ガス
としてのアルゴンガスが２０ｋＰａそれぞれ封入されて
いる。Electrodes 4 are provided at both ends in the light emitting section 2. The distance between the electrodes 4 is 1.2 mm. Further, in the light emitting section 2, one mercury as a light emitting metal is contained.
7.5 mg (about 0.175 mg / mm 3 , mercury vapor pressure during stable lighting: 17.5 MPa), 1.2 × 10 −4 μmol / mm 3 of bromine as a halogen gas, and argon gas as a starting gas. Each of 20 kPa is sealed.
【００２４】電極４は、封止部３に封着されたモリブデ
ン等の金属箔導体５を介して外部リード線６ａ，６ｂに
接続されている。また、この電極４は、外径が０．４ｍ
ｍ、長さが９．０ｍｍの電極軸部７と、この電極軸部７
の先端部に取り付けられた線径０．２０ｍｍからなる２
層密巻きのコイル部８（１層目が１４ターン、２層目が
７ターン）とを有している。The electrode 4 is connected to external lead wires 6a and 6b via a metal foil conductor 5 such as molybdenum sealed in the sealing portion 3. This electrode 4 has an outer diameter of 0.4 m.
m, an electrode shaft 7 having a length of 9.0 mm, and the electrode shaft 7
Consisting of a wire diameter of 0.20 mm attached to the tip of
It has a densely wound coil portion 8 (the first layer has 14 turns, the second layer has 7 turns).
【００２５】電極軸部７およびコイル部８の成分は、い
ずれもタングステンを主成分とし、不純物、つまり副成
分としてカリウム、鉄、アルミニウム、カルシウム、ク
ロム、モリブデン、ニッケル、およびケイ素が含まれて
いる。この副成分の総含有量は４０ｐｐｍ以下、例えば
８ｐｐｍであり、その中でもカリウムの含有量は１０ｐ
ｐｍ以下、例えば３ｐｐｍ、鉄の含有量は１５ｐｐｍ以
下、例えば２ｐｐｍである。The components of the electrode shaft portion 7 and the coil portion 8 are mainly composed of tungsten, and contain impurities, that is, potassium, iron, aluminum, calcium, chromium, molybdenum, nickel, and silicon as subcomponents. . The total content of these subcomponents is 40 ppm or less, for example, 8 ppm, and among them, the content of potassium is 10 ppm.
pm or less, for example, 3 ppm, and the iron content is 15 ppm or less, for example, 2 ppm.
【００２６】電極軸部７のうちコイル部８が設けられた
先端部を除く部分には、電極軸部７やコイル部８と同じ
成分からなり、外径０．５２ｍｍ、内径０．４２ｍｍ、
長さ４．０ｍｍのパイプ状の補強部材９が囲繞されてい
る。電極軸部７と補強部材９とは、例えば抵抗溶接等に
よって固定されている。The electrode shaft 7 has the same components as those of the electrode shaft 7 and the coil 8 except for the tip where the coil 8 is provided, and has an outer diameter of 0.52 mm, an inner diameter of 0.42 mm,
A pipe-shaped reinforcing member 9 having a length of 4.0 mm is surrounded. The electrode shaft 7 and the reinforcing member 9 are fixed by, for example, resistance welding or the like.
【００２７】次に、照明光学装置は、図２に示すよう
に、このような超高圧水銀ランプを反射鏡１０の内側
に、超高圧水銀ランプのランプ軸が反射鏡１０の光軸と
一致するよう、一体化された構成からなる。Next, in the illumination optical device, as shown in FIG. 2, such an ultra-high pressure mercury lamp is provided inside the reflector 10, and the lamp axis of the ultra-high pressure mercury lamp coincides with the optical axis of the reflector 10. As shown in FIG.
【００２８】なお、図２中、反射鏡１０の光軸を記号Ｘ
で示す。In FIG. 2, the optical axis of the reflecting mirror 10 is represented by a symbol X.
Indicated by
【００２９】超高圧水銀ランプの一方の外部リード線
（図示せず）は超高圧水銀ランプの端部に設けられた口
金１１に接続され、同じく他方の外部リード線６ｂは電
力供給線１２に接続されている。この電力供給線１２の
外部リード線６ｂとは反対側の端部は、反射鏡１０を貫
通し、後述する反射鏡１０の反射面１０ａとは反対側に
導出している。One external lead (not shown) of the ultra-high pressure mercury lamp is connected to a base 11 provided at the end of the ultra-high pressure mercury lamp, and the other external lead 6b is similarly connected to a power supply line 12. Have been. The end of the power supply line 12 opposite to the external lead wire 6b penetrates the reflecting mirror 10 and is led out on the opposite side to the reflecting surface 10a of the reflecting mirror 10 described later.
【００３０】反射鏡１０は、セラミック製で漏斗形状で
あり、その内面に酸化チタンと酸化シリコンとの蒸着膜
からなる凹面状の反射面１０ａを有している。この反射
鏡１０の前面投光部、すなわち開口部１０ｂは、その直
径が６５ｍｍ程度の大きさを有している。また、反射鏡
１０は、その開口部１０ｂとは反対側に支持筒部１０ｃ
を有している。この支持筒部１０ｃには、口金１１が絶
縁セメント１３によって固着されている。The reflecting mirror 10 is made of ceramic and has a funnel shape, and has a concave reflecting surface 10a made of a deposited film of titanium oxide and silicon oxide on its inner surface. The front projection part of the reflecting mirror 10, that is, the opening part 10b has a diameter of about 65 mm. The reflecting mirror 10 has a supporting cylinder 10c on the opposite side to the opening 10b.
have. A base 11 is fixed to the support cylinder portion 10c with insulating cement 13.
【００３１】さらに、図３に示すように、このような照
明光学装置を用いた画像表示装置を構成した。Further, as shown in FIG. 3, an image display device using such an illumination optical device was constructed.
【００３２】この画像表示装置は、照明光学装置を有す
る光源部１４と、この光源部１４から放射された光を集
光させる集光部１５と、集光された光をスクリーン１６
に投射する投射レンズ系１７とを備えている。This image display device includes a light source unit 14 having an illumination optical device, a light collecting unit 15 for collecting light emitted from the light source unit 14, and a screen 16 for collecting the collected light.
And a projection lens system 17 for projecting the light to the projector.
【００３３】次に、本発明の第１の実施の形態にかかる
超高圧水銀ランプ、照明光学装置、および画像表示装置
の作用効果について検討した。Next, the operational effects of the ultra-high pressure mercury lamp, the illumination optical device, and the image display device according to the first embodiment of the present invention were examined.
【００３４】まず、上記のような電極軸部７がパイプ状
の補強部材９で囲繞された電極４を用いた超高圧水銀ラ
ンプ（以下、本発明品Ａ1という）の製造工程時（封止
部３の形成時）または点灯中の電極４（電極軸部７）の
折損率について調べた。[0034] First, ultra-high pressure mercury lamp electrode shaft 7 as described above using an electrode 4 which is surrounded by a pipe-shaped reinforcing member 9 (hereinafter, book invention product A 1) during the manufacturing process of the (sealing The breaking rate of the electrode 4 (at the time of forming the portion 3) or during lighting was examined.
【００３５】また、比較のために、電極軸部７が補強部
材９で囲繞されていない点を除いて本発明の第１の実施
の形態であるランプ電力１５０Ｗの超高圧水銀ランプと
同じ構成を有しているランプ電力１５０Ｗの超高圧水銀
ランプ（以下、比較品Ａ1という）についても、本発明
品Ａ1と同じ条件で電極４の折損率について調べた。For comparison, the same configuration as that of the ultrahigh-pressure mercury lamp with a lamp power of 150 W according to the first embodiment of the present invention is adopted except that the electrode shaft 7 is not surrounded by the reinforcing member 9. have been and ultra-high pressure mercury lamp of the lamp power 150 W (hereinafter, referred to as Comparative product a 1) for were also examined breakage of the electrode 4 in the same conditions as the present invention product a 1.
【００３６】なお、本発明品Ａ1および比較品Ａ1をそれ
ぞれ２００本ずつ作製した。Incidentally, 200 pieces of the product A 1 of the present invention and 200 pieces of the comparative product A 1 were produced.
【００３７】その結果、本発明品Ａ1では、全数のもの
において電極４が製造工程時および点灯中に折損したも
のはなかった。つまり、本発明品Ａ1では電極４の折損
率が０％であった。一方、比較品Ａ1では、２００本中
１８本のものの電極４が製造工程時または点灯中に折損
した。つまり、比較品Ａ1では電極４の折損率が９％で
あった。[0037] Consequently, the present invention product A 1, electrode 4 in that of the total number were not those breakage and during the lighting time of manufacture process. In other words, breakage rate of the inventive product A 1 in the electrode 4 was 0%. On the other hand, in the comparative product A 1, 200 present in eighteen electrodes 4 of those were broken or lit during the manufacturing process. In other words, breakage rate of Comparative Product A 1 in the electrode 4 was 9%.
【００３８】次に、本発明の第１の実施の形態にかかる
画像表示装置（以下、本発明品Ａ2という）の照明光学
装置において、口金１１と電力供給線１２との間に交流
電源（図示せず）を接続し、ランプ電圧約６８Ｖ、ラン
プ電流約２.２Ａ、ランプ電力１５０Ｗで超高圧水銀ラ
ンプを点灯させ、ランプ効率（ｌｍ／Ｗ）、反射鏡１０
からの放射光の色温度（Ｋ）、およびスクリーン照度維
持率の経時変化についてそれぞれ調べた。Next, an image display apparatus according to a first embodiment of the present invention (hereinafter, referred to as the present invention product A 2) in the illumination optical apparatus, an AC power supply between the mouthpiece 11 and the power supply line 12 ( (Not shown), the ultra-high pressure mercury lamp is turned on at a lamp voltage of about 68 V, a lamp current of about 2.2 A, and a lamp power of 150 W, and the lamp efficiency (lm / W) and the reflector 10
The color temperature (K) of the radiated light and the temporal change of the screen illuminance maintenance ratio were examined.
【００３９】また、比較のために、上記比較品Ａ1と同
じ超高圧水銀ランプを用いた点を除いて本発明の第１の
実施の形態である画像表示装置と同じ構成を有している
画像表示装置（以下、比較品Ａ2）についても、本発明
品Ａ2と同じ条件でランプ効率、反射鏡１０からの放射
光の色温度、およびスクリーン照度維持率の経時変化に
ついてそれぞれ調べた。Further, for comparison, has an image display device the same configuration as the first embodiment of the present invention except for using the same ultra-high pressure Mercury lamp and the Comparative Product A 1 With respect to the image display device (hereinafter, comparative product A 2 ), the lamp efficiency, the color temperature of the light emitted from the reflecting mirror 10, and the change over time in the screen illuminance maintenance ratio were examined under the same conditions as those of the inventive product A 2 .
【００４０】なお、本発明品Ａ2および比較品Ａ2のスク
リーン照度維持率の経時変化については図４にそれぞれ
示す。ただし、図４中、記号イは本発明品Ａ2を、記号
ロは比較品Ａ2をそれぞれ示す。[0040] Note that the temporal change of screen illuminance maintenance factor of the present invention product A 2 and Comparative Product A 2 are respectively shown in FIG. However, shown in FIG. 4, the symbol i is the present invention product A 2, symbol B is a comparative product A 2 respectively.
【００４１】その結果、本発明品Ａ2および比較品Ａ2の
いずれも、ランプ効率が６５ｌｍ／Ｗであり、また反射
鏡１０からの放射光の色温度が約７０００Ｋであった。
また、図４から明らかなように、スクリーン照度維持率
の経時変化についても本発明品Ａ2および比較品Ａ2のい
ずれもほぼ同程度であり、例えば３０００時間点灯経過
後のスクリーン照度維持率が両者とも約８５％であっ
た。[0041] As a result, none of the present invention product A 2 and Comparative Product A 2, lamp efficiency is 65lm / W, also color temperature of the emitted light from the reflecting mirror 10 was about 7000K.
Further, as apparent from FIG. 4, is almost the same even none of the present invention product A 2 and Comparative Product A 2 for aging of the screen illuminance maintenance factor, for example, 3000 hours of light after the lapse of the screen illuminance maintenance factor Both were about 85%.
【００４２】以上のように本発明の第１の実施の形態に
かかる超高圧水銀ランプの構成によれば、高いランプ効
率、高い演色性、および長寿命を維持しつつ、電極４の
機械的強度が低下しても、電極４が製造工程時または点
灯中に折損するのを防止することができ、高い信頼性を
得ることができる。As described above, according to the configuration of the ultrahigh-pressure mercury lamp according to the first embodiment of the present invention, the mechanical strength of the electrode 4 is maintained while maintaining high lamp efficiency, high color rendering, and long life. Even if the value decreases, the electrode 4 can be prevented from being broken during the manufacturing process or during lighting, and high reliability can be obtained.
【００４３】また、電極軸部７の外径をＲ（ｍｍ）、パ
イプ状の補強部材９の肉厚をｒ1（ｍｍ）とした場合、
１／３０Ｒ≦ｒ1≦１／２Ｒなる関係式を満たすことが
好ましい。その理由は次のとおりである。When the outer diameter of the electrode shaft 7 is R (mm) and the thickness of the pipe-shaped reinforcing member 9 is r 1 (mm),
It is preferable to satisfy the relational expression of 1 / 30R ≦ r 1 ≦ 1 / 2R. The reason is as follows.
【００４４】上記本発明の第１の実施の形態であるラン
プ電力１５０Ｗの超高圧水銀ランプにおいて、電極４の
電極軸部７の外径Ｒを例えば０．４ｍｍとし、パイプ状
の補強部材９の肉厚ｒ1（ｍｍ）を種々変化させた場合
の電極４（電極軸部７）の折損の有無、および発光管１
のクラックの発生の有無についてそれぞれ調べたとこ
ろ、表１に示すとおりの結果が得られた。In the ultra-high pressure mercury lamp with a lamp power of 150 W according to the first embodiment of the present invention, the outer diameter R of the electrode shaft 7 of the electrode 4 is set to, for example, 0.4 mm, and the pipe-shaped reinforcing member 9 is formed. The presence or absence of breakage of the electrode 4 (electrode shaft portion 7) when the wall thickness r 1 (mm) is variously changed, and the arc tube 1
Each was examined for the occurrence of cracks, and the results shown in Table 1 were obtained.
【００４５】なお、表１において、「○」印は良好、
「×」印は不良であることをそれぞれ示す。In Table 1, the mark “○” is good,
The “x” mark indicates that each is defective.
【００４６】[0046]
【表１】 [Table 1]
【００４７】表１から明らかなように、電極軸部７の外
径が０．４ｍｍの場合において、補強部材９の肉厚ｒ1
が０．０１３ｍｍ以上では電極４の折損が生じないこと
がわかった。一方、補強部材９の肉厚ｒ1が０．０１３
ｍｍ未満、例えば０．０１ｍｍでは電極４が折損した。
これは、補強部材９の肉厚ｒ1が薄すぎるためであると
考えられる。また、補強部材９の肉厚ｒ1が０．２ｍｍ
を越える場合、例えば０．２０５ｍｍでは発光管１にク
ラックが発生することがわかった。これは、補強部材９
の肉厚ｒ1が厚すぎて、発光管１の強度が低下したため
であると考えられる。As is clear from Table 1, when the outer diameter of the electrode shaft 7 is 0.4 mm, the thickness r 1 of the reinforcing member 9 is set.
It was found that when the thickness was 0.013 mm or more, the electrode 4 did not break. On the other hand, the thickness r 1 of the reinforcing member 9 is 0.013.
If the thickness is less than 1 mm, for example, 0.01 mm, the electrode 4 breaks.
This is considered to be because the thickness r 1 of the reinforcing member 9 is too thin. The thickness r 1 of the reinforcing member 9 is 0.2 mm.
It was found that cracks occurred in the arc tube 1 at, for example, 0.205 mm. This is the reinforcement member 9
Is considered to be because the thickness r 1 of the light emitting tube was too thick, and the strength of the arc tube 1 was reduced.
【００４８】したがって、パイプ状の補強部材９の肉厚
ｒ1（ｍｍ）が、上記１／３０Ｒ≦ｒ1≦１／２Ｒなる関
係式を満たすことにより、補強部材９が電極４の折損を
防止するという機能を十分果たすことができ、かつ発光
管１の強度低下を抑制して、発光管１にクラックが発生
するのを防止することができる。Therefore, when the thickness r 1 (mm) of the pipe-shaped reinforcing member 9 satisfies the above relational expression of 1 / 30R ≦ r 1 ≦ 1 / 2R, the reinforcing member 9 prevents the electrode 4 from being broken. In addition, it is possible to sufficiently fulfill the function of reducing the strength of the arc tube 1 and to prevent the arc tube 1 from cracking.
【００４９】また、本発明の第１の実施の形態にかかる
照明光学装置の構成によれば、高いランプ効率、高い演
色性、および長寿命を維持しつつ、高い信頼性を得るこ
とができる。Further, according to the configuration of the illumination optical apparatus according to the first embodiment of the present invention, high reliability can be obtained while maintaining high lamp efficiency, high color rendering, and long life.
【００５０】さらに、本発明の第１の実施の形態にかか
る画像表示装置の構成によれば、高いランプ効率、高い
演色性、および長寿命を維持しつつ、高い信頼性を得る
ことができる。Further, according to the configuration of the image display device according to the first embodiment of the present invention, high reliability can be obtained while maintaining high lamp efficiency, high color rendering, and long life.
【００５１】次に、本発明の第２の実施の形態であるラ
ンプ電力１５０Ｗの超高圧水銀ランプ、この超高圧水銀
ランプを用いた照明光学装置、およびこの照明光学装置
を用いた画像表示装置について説明する。Next, an ultra-high pressure mercury lamp with a lamp power of 150 W, an illumination optical device using the ultra high pressure mercury lamp, and an image display device using the illumination optical device according to a second embodiment of the present invention will be described. explain.
【００５２】図５に示すように、ランプ電力１５０Ｗの
超高圧水銀ランプは、電極軸部７のうちコイル部８が設
けられた先端部を除く部分に、パイプ状の補強部材９の
代わりとして、線径０．０１ｍｍ、長さ４．０ｍｍのタ
ングステンを主成分とする１層密巻きのコイル状の補強
部材１８が囲繞されている点を除いて本発明の第１の実
施の形態であるランプ電力１５０Ｗの超高圧水銀ランプ
と同じ構成を有している。As shown in FIG. 5, the ultra-high pressure mercury lamp with a lamp power of 150 W is provided on the electrode shaft portion 7 except for the tip portion where the coil portion 8 is provided, instead of the pipe-shaped reinforcing member 9. A lamp according to a first embodiment of the present invention except that a single-layer tightly wound coil-shaped reinforcing member 18 mainly composed of tungsten having a wire diameter of 0.01 mm and a length of 4.0 mm is surrounded. It has the same configuration as an ultra-high pressure mercury lamp with a power of 150 W.
【００５３】電極軸部７と補強部材１８とは、例えば抵
抗溶接等によって固定されている。The electrode shaft 7 and the reinforcing member 18 are fixed by, for example, resistance welding.
【００５４】照明光学装置（図示せず）は、本発明の第
２の実施の形態であるランプ電力１５０Ｗの超高圧水銀
ランプを用いた点を除いて図２に示すような本発明の第
１の実施の形態である照明光学装置と同じ構成を有して
いる。The illumination optical device (not shown) uses the first embodiment of the present invention as shown in FIG. 2 except that an ultra-high pressure mercury lamp with a lamp power of 150 W according to the second embodiment of the present invention is used. It has the same configuration as the illumination optical device according to the embodiment.
【００５５】また、画像表示装置（図示せず）は、本発
明の第２の実施の形態である照明光学装置を用いた点を
除いて図３に示すような本発明の第１の実施の形態であ
る画像表示装置と同じ構成を有している。An image display device (not shown) has a first embodiment of the present invention as shown in FIG. 3 except that an illumination optical device according to a second embodiment of the present invention is used. It has the same configuration as the image display device which is an embodiment.
【００５６】次に、上記本発明の第２の実施の形態にか
かる超高圧水銀ランプ、照明光学装置、および画像表示
装置の作用効果について検討した。Next, the operational effects of the ultra-high pressure mercury lamp, the illumination optical device, and the image display device according to the second embodiment of the present invention were examined.
【００５７】まず、上記のような電極軸部７がコイル状
の補強部材１８で囲繞された電極４を用いた超高圧水銀
ランプ（以下、本発明品Ｂ1という）の製造工程時（封
止部３の形成時）または点灯中の電極４（電極軸部７）
の折損率について調べた。First, during the manufacturing process (sealing) of an ultra-high pressure mercury lamp (hereinafter referred to as the product B 1 of the present invention) using the electrode 4 in which the electrode shaft portion 7 is surrounded by the coil-shaped reinforcing member 18 as described above. The electrode 4 (at the time of forming the part 3) or the lighted electrode 4 (electrode shaft part 7)
Was examined for the breakage rate.
【００５８】なお、本発明品Ｂ1を２００本作製した。[0058] Incidentally, the present invention product B 1 produced 200 present.
【００５９】その結果、本発明品Ｂ1では、全数のもの
において電極４が製造工程時および点灯中に折損したも
のはなかった。つまり、本発明品Ｂ1では電極４の折損
率が０％であった。[0059] Consequently, the present invention product B 1, electrode 4 in that of the total number were not those breakage and during the lighting time of manufacture process. In other words, breakage rate of the present invention product B 1 at electrode 4 is was 0%.
【００６０】次に、上記本発明の第２の実施の形態にか
かる画像表示装置（以下、本発明品Ｂ2という）の照明
光学装置において、口金と電力供給線との間に交流電源
を接続し、ランプ電圧約６８Ｖ、ランプ電流約２.２
Ａ、ランプ電力１５０Ｗで超高圧水銀ランプを点灯さ
せ、ランプ効率（ｌｍ／Ｗ）、反射鏡からの放射光の色
温度（Ｋ）、およびスクリーン照度維持率の経時変化に
ついてそれぞれ調べた。Next, an image display apparatus according to a second embodiment of the present invention (hereinafter, referred to as the present invention product B 2) in the illumination optical apparatus, connecting the AC power source between the cap and the power supply line And a lamp voltage of about 68 V and a lamp current of about 2.2
A, an ultra-high pressure mercury lamp was turned on at a lamp power of 150 W, and the lamp efficiency (lm / W), the color temperature of emitted light from a reflecting mirror (K), and the change over time in the screen illuminance maintenance ratio were examined.
【００６１】また、比較のために、上記比較品Ａ1と同
じ超高圧水銀ランプを用いた点を除いて本発明の第１の
実施の形態である画像表示装置と同じ構成を有している
画像表示装置（以下、比較品Ｂ2）についても、本発明
品Ｂ2と同じ条件でランプ効率、反射鏡からの放射光の
色温度、およびスクリーン照度維持率の経時変化につい
てそれぞれ調べた。[0061] For comparison, it has an image display device the same configuration as the first embodiment of the present invention except for using the same ultra-high pressure mercury lamp and the Comparative Product A 1 With respect to the image display device (hereinafter, comparative product B 2 ), the lamp efficiency, the color temperature of light emitted from the reflecting mirror, and the change over time in the screen illuminance maintenance ratio were examined under the same conditions as those of the inventive product B 2 .
【００６２】なお、本発明品Ｂ2および比較品Ｂ2のスク
リーン照度維持率の経時変化については図６にそれぞれ
示す。ただし、図６中、記号ハは本発明品Ｂ2を、記号
ニは比較品Ｂ2をそれぞれ示す。[0062] Note that the temporal change of screen illuminance maintenance factor of the present invention product B 2 and Comparative Product B 2 are respectively shown in FIG. However, shown in FIG. 6, the symbol c is the present invention product B 2, the symbol D is a comparative product B 2, respectively.
【００６３】その結果、本発明品Ｂ2および比較品Ｂ2の
いずれも、ランプ効率が６５ｌｍ／Ｗであり、また反射
鏡からの放射光の色温度が約７０００Ｋであった。ま
た、図６から明らかなように、スクリーン照度維持率の
経時変化についても本発明品Ｂ 2および比較品Ｂ2のいず
れもほぼ同程度であり、例えば３０００時間点灯経過後
のスクリーン照度維持率が両者とも約８６％であった。As a result, the product B of the present inventionTwoAnd comparative product BTwoof
In each case, the lamp efficiency is 65 lm / W and the reflection is
The color temperature of the light emitted from the mirror was about 7000K. Ma
In addition, as is clear from FIG.
The product of the present invention B with time change TwoAnd comparative product BTwoNozomi
They are almost the same, for example, after 3000 hours of lighting.
Were about 86% in both cases.
【００６４】以上のような本発明の第２の実施の形態に
かかる超高圧水銀ランプの構成によれば、本発明の第１
の実施の形態にかかる超高圧水銀ランプ１と同様に、高
いランプ効率、高い演色性、長寿命を維持しつつ、電極
４の機械的強度が低下しても、電極４が製造工程時また
は点灯中に折損するのを防止することができ、高い信頼
性を得ることができる。According to the configuration of the extra-high pressure mercury lamp according to the second embodiment of the present invention as described above, the first
As in the case of the ultrahigh-pressure mercury lamp 1 according to the embodiment, while maintaining high lamp efficiency, high color rendering, and long life, even if the mechanical strength of the electrode 4 is reduced, the electrode 4 may be turned on or off during the manufacturing process. Breakage inside can be prevented, and high reliability can be obtained.
【００６５】また、電極軸部７の外径をＲ（ｍｍ）、コ
イル状の補強部材１８の線径をｒ2（ｍｍ）とした場
合、１／１０Ｒ≦ｒ2≦３／４Ｒなる関係式を満たすこ
とが好ましい。その理由は次のとおりである。When the outer diameter of the electrode shaft 7 is R (mm) and the wire diameter of the coil-shaped reinforcing member 18 is r 2 (mm), a relational expression of 1 / 10R ≦ r 2 ≦ 3 / 4R It is preferable to satisfy the following. The reason is as follows.
【００６６】上記本発明の第２の実施の形態であるラン
プ電力１５０Ｗの超高圧水銀ランプにおいて、電極４の
電極軸部７の外径Ｒを例えば０．４ｍｍとし、コイル状
の補強部材１８の肉厚ｒ2（ｍｍ）を種々変化させた場
合の電極４（電極軸部７）の折損の有無、および発光管
１のクラックの発生の有無についてそれぞれ調べたとこ
ろ、表２に示すとおりの結果が得られた。In the ultra-high pressure mercury lamp with a lamp power of 150 W according to the second embodiment of the present invention, the outer diameter R of the electrode shaft 7 of the electrode 4 is set to, for example, 0.4 mm, and the coil-shaped reinforcing member 18 is formed. When the thickness of the electrode 4 (electrode shaft portion 7) was changed and the occurrence of cracks in the arc tube 1 was examined when the thickness r 2 (mm) was variously changed, the results were as shown in Table 2. was gotten.
【００６７】なお、コイル状の補強部材１８の線径を変
えることにより、補強部材１８の肉厚ｒ2（ｍｍ）を種
々変化させた。The thickness r 2 (mm) of the reinforcing member 18 was variously changed by changing the wire diameter of the coil-shaped reinforcing member 18.
【００６８】なお、表２において、「○」印は良好、
「×」印は不良であることをそれぞれ示す。In Table 2, the mark “○” is good,
The “x” mark indicates that each is defective.
【００６９】[0069]
【表２】 [Table 2]
【００７０】表２から明らかなように、電極軸部７の外
径が０．４ｍｍの場合において、補強部材１８の肉厚ｒ
2が０．０４ｍｍ以上では電極４の折損が生じないこと
がわかった。一方、補強部材１８の肉厚ｒ2が０．０４
ｍｍ未満、例えば０．０３ｍｍでは電極４が折損した。
これは、補強部材１８の肉厚ｒ2が薄すぎるためである
と考えられる。また、補強部材１８の肉厚ｒ2が０．３
ｍｍを越える場合、例えば０．３５ｍｍでは発光管１に
クラックが発生することがわかった。これは、補強部材
１８の肉厚ｒ1が厚すぎて、発光管１の強度が低下した
ためであると考えられる。As is clear from Table 2, when the outer diameter of the electrode shaft 7 is 0.4 mm, the thickness r
2 it was found that the breakage of the electrode 4 does not occur in the above 0.04 mm. On the other hand, the thickness r 2 of the reinforcing member 18 is 0.04
The electrode 4 was broken when the thickness was less than 0.03 mm, for example, 0.03 mm.
This is considered to be because the thickness r 2 reinforcing member 18 is too thin. The thickness r 2 of the reinforcing member 18 is 0.3
It was found that cracks occurred in the arc tube 1 when the diameter exceeded 0.3 mm, for example, 0.35 mm. This wall thickness r 1 is too thick reinforcing member 18, the intensity of the light emission tube 1 is considered to be due to decreased.
【００７１】したがって、コイル状の補強部材１８の肉
厚ｒ2（ｍｍ）が、上記１／１０Ｒ≦ｒ1≦３／４Ｒなる
関係式を満たすことにより、補強部材１８が電極４の折
損を防止するという機能を十分果たすことができ、かつ
発光管１の強度低下を抑制して、発光管１にクラックが
発生するのを防止することができる。Therefore, when the thickness r 2 (mm) of the coil-shaped reinforcing member 18 satisfies the relational expression of 1 / 10R ≦ r 1 ≦ 3 / 4R, the reinforcing member 18 prevents the electrode 4 from being broken. In addition, it is possible to sufficiently fulfill the function of reducing the strength of the arc tube 1 and to prevent the arc tube 1 from cracking.
【００７２】また、本発明の第２の実施の形態にかかる
照明光学装置の構成によれば、本発明の第１の実施の形
態にかかる照明光学装置と同様に、高いランプ効率、高
い演色性、および長寿命を維持しつつ、高い信頼性を得
ることができる。Further, according to the configuration of the illumination optical device according to the second embodiment of the present invention, like the illumination optical device according to the first embodiment of the present invention, high lamp efficiency and high color rendering properties are obtained. And high reliability can be obtained while maintaining a long life.
【００７３】さらに、本発明の第２の実施の形態にかか
る画像表示装置の構成によれば、本発明の第１の実施の
形態にかかる画像表示装置と同様に、高いランプ効率、
高い演色性、および長寿命を維持しつつ、高い信頼性を
得ることができる。Further, according to the configuration of the image display device according to the second embodiment of the present invention, as with the image display device according to the first embodiment of the present invention, high lamp efficiency,
High reliability can be obtained while maintaining high color rendering properties and long life.
【００７４】次に、本発明の第３の実施の形態であるラ
ンプ電力１５０Ｗの超高圧水銀ランプ、この超高圧水銀
ランプを用いた照明光学装置、およびこの照明光学装置
を用いた画像表示装置について説明する。Next, an ultra-high pressure mercury lamp with a lamp power of 150 W, an illumination optical device using the ultra high pressure mercury lamp, and an image display device using the illumination optical device according to the third embodiment of the present invention will be described. explain.
【００７５】図７に示すように、ランプ電力１５０Ｗの
超高圧水銀ランプは、電極構造が異なる点を除いて本発
明の第２の実施の形態であるランプ電力１５０Ｗの超高
圧水銀ランプと同じ構成を有している。As shown in FIG. 7, the ultra-high pressure mercury lamp with a lamp power of 150 W has the same configuration as the ultra-high pressure mercury lamp with a lamp power of 150 W according to the second embodiment of the present invention except that the electrode structure is different. have.
【００７６】電極１９は、放電路側先端部の最大外径が
１．２ｍｍ、放電路側の先端外径が０．８ｍｍ、封止部
３側の電極軸部２０の外径が０．４ｍｍの一体型電極か
らなる。この電極１９の電極間距離は１．２ｍｍであ
る。また、電極１９の封止部３側端部は、封止部３に封
着されたモリブデン等の金属箔導体５を介して外部リー
ド線（図示せず）に接続されている。The electrode 19 has a maximum outer diameter of 1.2 mm at the distal end of the discharge path, an outer diameter of 0.8 mm at the distal end of the discharge path, and an outer diameter of 0.4 mm of the electrode shaft 20 at the sealing section 3 side. It consists of body electrodes. The distance between the electrodes 19 is 1.2 mm. The end of the electrode 19 on the sealing portion 3 side is connected to an external lead wire (not shown) via a metal foil conductor 5 such as molybdenum sealed in the sealing portion 3.
【００７７】また、電極１９の成分は、タングステンを
主成分とし、不純物、つまり副成分としてカリウム、
鉄、アルミニウム、カルシウム、クロム、モリブデン、
ニッケル、およびケイ素が含まれている。この副成分の
総含有量は４０ｐｐｍ以下、例えば７ｐｐｍであり、そ
の中でもカリウムの含有量は１０ｐｐｍ以下、例えば２
ｐｐｍ、鉄の含有量は１５ｐｐｍ以下、例えば２ｐｐｍ
である。The electrode 19 has tungsten as a main component and potassium as an impurity, that is, an auxiliary component.
Iron, aluminum, calcium, chromium, molybdenum,
Contains nickel and silicon. The total content of these subcomponents is 40 ppm or less, for example, 7 ppm, and among them, the potassium content is 10 ppm or less, for example, 2 ppm.
ppm, iron content is 15 ppm or less, for example, 2 ppm
It is.
【００７８】電極１９の電極軸部２０には、電極１９と
同じ成分からなり、線径０．０１ｍｍ、長さ４．０ｍｍ
のコイル状の補強部材１８が囲繞されている。補強部材
１８と電極軸部２０とは、例えば抵抗溶接等によって固
定されている。The electrode shaft portion 20 of the electrode 19 is made of the same components as the electrode 19, and has a wire diameter of 0.01 mm and a length of 4.0 mm.
Is surrounded by the coil-shaped reinforcing member 18. The reinforcing member 18 and the electrode shaft portion 20 are fixed by, for example, resistance welding or the like.
【００７９】照明光学装置（図示せず）は、本発明の第
３の実施の形態であるランプ電力１５０Ｗの超高圧水銀
ランプを用いた点を除いて図２に示すような本発明の第
１の実施の形態である照明光学装置と同じ構成を有して
いる。The illumination optical device (not shown) uses the first embodiment of the present invention as shown in FIG. 2 except that an ultra-high pressure mercury lamp with a lamp power of 150 W according to the third embodiment of the present invention is used. It has the same configuration as the illumination optical device according to the embodiment.
【００８０】また、画像表示装置（図示せず）は、本発
明の第３の実施の形態である照明光学装置を用いた点を
除いて図３に示すような本発明の第１の実施の形態であ
る画像表示装置と同じ構成を有している。An image display device (not shown) has a first embodiment of the present invention as shown in FIG. 3 except that an illumination optical device according to the third embodiment of the present invention is used. It has the same configuration as the image display device which is an embodiment.
【００８１】次に、上記本発明の第３の実施の形態にか
かる超高圧水銀ランプ、照明光学装置、および画像表示
装置の作用効果について検討した。Next, the operational effects of the ultra-high pressure mercury lamp, the illumination optical device, and the image display device according to the third embodiment of the present invention were examined.
【００８２】まず、上記のような電極軸部２０がコイル
状の補強部材１８で囲繞された電極１９を用いた超高圧
水銀ランプ（以下、本発明品Ｃ1という）の製造工程時
（封止部３の形成時）または点灯中の電極１９（電極軸
部２０）の折損率について調べた。[0082] First, ultra-high pressure mercury lamp electrode shaft portion 20 as described above using an electrode 19 which is surrounded by a coil-like reinforcing member 18 (hereinafter, referred to as present invention products C 1) during the manufacturing process of the (sealing The breaking ratio of the electrode 19 (the electrode shaft portion 20) during the formation of the portion 3) or during lighting was examined.
【００８３】また、比較のために、電極軸部２０が補強
部材１８で囲繞されていない点を除いて本発明の第３の
実施の形態であるランプ電力１５０Ｗの超高圧水銀ラン
プと同じ構成を有しているランプ電力１５０Ｗの超高圧
水銀ランプ（以下、比較品Ｃ 1という）についても、本
発明品Ｃ1と同じ条件で電極１９の折損率について調べ
た。For comparison, the electrode shaft 20 is reinforced.
The third aspect of the present invention except that it is not surrounded by the member 18
Ultra-high pressure mercury lamp with lamp power of 150 W according to an embodiment
Ultra high voltage with lamp power 150W having the same configuration as the lamp
Mercury lamp (hereinafter, comparative product C) 1Book)
Invention C1Check the breakage rate of electrode 19 under the same conditions as
Was.
【００８４】なお、本発明品Ｃ1および比較品Ｃ1をそれ
ぞれ２００本ずつ作製した。Incidentally, 200 pieces each of the product C 1 of the present invention and the comparative product C 1 were produced.
【００８５】その結果、本発明品Ｃ1では、全数のもの
において電極１９が製造工程時および点灯中に折損した
ものはなかった。つまり、本発明品Ａ1では電極１９の
折損率が０％であった。一方、比較品Ｃ1では、２００
本中４２本のものの電極１９が製造工程時または点灯中
に折損した。つまり、比較品Ｃ1では電極１９の折損率
が２１％であった。[0085] Consequently, the present invention product C 1, electrode 19 in what the total number was not obtained by breaking and during the lighting time of manufacture process. In other words, breakage rate of the inventive product A 1 in the electrode 19 was 0%. On the other hand, in the comparative product C 1, 200
42 of the electrodes 19 were broken during the manufacturing process or during lighting. In other words, breakage rate of comparative C 1 at electrode 19 was 21%.
【００８６】次に、本発明の第２の実施の形態にかかる
画像表示装置（以下、本発明品Ｃ2という）の照明光学
装置において、口金と電力供給線との間に交流電源を接
続し、ランプ電圧約６８Ｖ、ランプ電流約２.２Ａ、ラ
ンプ電力１５０Ｗで超高圧水銀ランプを点灯させ、ラン
プ効率（ｌｍ／Ｗ）、反射鏡からの放射光の色温度
（Ｋ）、およびスクリーン照度維持率の経時変化につい
てそれぞれ調べた。[0086] Next, an image display apparatus according to a second embodiment of the present invention (hereinafter, referred to as the present invention product C 2) the illumination optical apparatus, to connect the AC source between the cap and the power supply line An ultra-high pressure mercury lamp is turned on with a lamp voltage of about 68 V, a lamp current of about 2.2 A, and a lamp power of 150 W, and maintains the lamp efficiency (lm / W), the color temperature of light emitted from the reflector (K), and the screen illuminance. The rate of change over time was examined.
【００８７】また、比較のために、上記比較品Ｃ1と同
じ超高圧水銀ランプを用いた点を除いて本発明の第３の
実施の形態である画像表示装置と同じ構成を有している
画像表示装置（以下、比較品Ｃ2）についても、本発明
品Ｃ2と同じ条件でランプ効率、反射鏡からの放射光の
色温度、およびスクリーン照度維持率の経時変化につい
てそれぞれ調べた。[0087] For comparison, it has an image display device the same configuration as the third embodiment of the present invention except for using the same ultra-high pressure mercury lamp and the comparative products C 1 With respect to the image display device (hereinafter, comparative product C 2 ), the lamp efficiency, the color temperature of the light emitted from the reflecting mirror, and the time-dependent changes in the screen illuminance maintenance ratio were examined under the same conditions as the inventive product C 2 .
【００８８】なお、本発明品Ｃ2および比較品Ｃ2のスク
リーン照度維持率の経時変化については図８にそれぞれ
示す。ただし、図８中、記号ホは本発明品Ｃ2を、記号
ヘは比較品Ｃ2をそれぞれ示す。[0088] Note that the temporal change of screen illuminance maintenance factor of the present invention product C 2 and comparative C 2 are respectively shown in FIG. However, it is shown in FIG. 8, the symbol ho the present invention product C 2, the symbol f is the comparative C 2, respectively.
【００８９】その結果、本発明品Ｃ2および比較品Ｃ2の
いずれも、ランプ効率が６４ｌｍ／Ｗであり、また反射
鏡からの放射光の色温度が約６９００Ｋであった。ま
た、図８から明らかなように、スクリーン照度維持率の
経時変化についても本発明品Ｃ 2および比較品Ｃ2のいず
れもほぼ同程度であり、例えば５０００時間点灯経過後
のスクリーン照度維持率が９２％であった。As a result, the product C of the present inventionTwoAnd comparative product CTwoof
In each case, the lamp efficiency is 64 lm / W and the reflection is
The color temperature of the light emitted from the mirror was about 6900K. Ma
In addition, as is clear from FIG.
The product of the present invention C TwoAnd comparative product CTwoNozomi
They are almost the same, for example, after lighting for 5000 hours.
Was 92%.
【００９０】以上のように本発明の第３の実施の形態に
かかる超高圧水銀ランプの構成によれば、本発明の第１
の実施の形態にかかる超高圧水銀ランプと同様に、高い
ランプ効率、高い演色性、長寿命を維持しつつ、電極１
９の機械的強度が低下しても、電極１９が製造工程時ま
たは点灯中に折損するのを防止することができ、高い信
頼性を得ることができる。According to the configuration of the extra-high pressure mercury lamp according to the third embodiment of the present invention as described above, the first
Similarly to the ultra high pressure mercury lamp according to the embodiment, the electrode 1 is maintained while maintaining high lamp efficiency, high color rendering, and long life.
Even if the mechanical strength of the electrode 9 is reduced, it is possible to prevent the electrode 19 from being broken during the manufacturing process or during lighting, and to obtain high reliability.
【００９１】また、本発明の第３の実施の形態にかかる
照明光学装置の構成によれば、本発明の第１の実施の形
態にかかる照明光学装置と同様に、高いランプ効率、高
い演色性、および長寿命を維持しつつ、高い信頼性を得
ることができる。Further, according to the configuration of the illumination optical device according to the third embodiment of the present invention, like the illumination optical device according to the first embodiment of the present invention, high lamp efficiency and high color rendering properties are obtained. And high reliability can be obtained while maintaining a long life.
【００９２】さらに、本発明の第３の実施の形態にかか
る画像表示装置の構成によれば、本発明の第１の実施の
形態にかかる画像表示装置と同様に、高いランプ効率、
高い演色性、および長寿命を維持しつつ、高い信頼性を
得ることができる。Further, according to the configuration of the image display device according to the third embodiment of the present invention, as with the image display device according to the first embodiment of the present invention, high lamp efficiency,
High reliability can be obtained while maintaining high color rendering properties and long life.
【００９３】なお、上記第１ないし第３の実施の形態で
は、タングステンを主成分とする補強部材９，１８の場
合について説明したが、タングステンに限らずモリブデ
ン、レニウム、またはイリジウムを主成分とする補強部
材を用いた場合でも上記と同様の効果を得ることができ
る。In the first to third embodiments, the reinforcing members 9 and 18 containing tungsten as a main component have been described. However, not only tungsten but also molybdenum, rhenium, or iridium as a main component. Even when a reinforcing member is used, the same effect as described above can be obtained.
【００９４】また、上記第１ないし第３の実施の形態で
は、ランプ電力１５０Ｗの超高圧水銀ランプに適用した
場合について説明したが、例えばランプ電力１００Ｗや
２５０Ｗの超高圧水銀ランプの場合、また水銀蒸気圧
（安定点灯時）が１０Ｐａ〜２５ＭＰａの高圧水銀ラン
プに適用しても上記と同様の効果を得ることができる。In the first to third embodiments, the case where the present invention is applied to an ultra-high pressure mercury lamp with a lamp power of 150 W has been described. Even when applied to a high-pressure mercury lamp having a vapor pressure (during stable lighting) of 10 Pa to 25 MPa, the same effect as described above can be obtained.
【００９５】さらに、本発明は、交流点灯の超高圧水銀
ランプだけでなく、直流点灯の超高圧水銀ランプにも適
用することができる。Further, the present invention can be applied not only to an ultra-high pressure mercury lamp of AC lighting but also to an ultra-high pressure mercury lamp of DC lighting.
【００９６】[0096]
【発明の効果】以上説明したように本発明は、高いラン
プ効率、高い演色性、長寿命を維持しつつ、電極の機械
的強度が低下しても、電極が製造工程時または点灯中に
折損するのを防止することができ、信頼性の高い高圧水
銀ランプを提供することができるものである。As described above, according to the present invention, while maintaining high lamp efficiency, high color rendering, and long life, even if the mechanical strength of the electrode is reduced, the electrode is broken during the manufacturing process or during lighting. Therefore, a highly reliable high-pressure mercury lamp can be provided.
【００９７】また、本発明は、本発明の高圧水銀ランプ
を用いることにより、高いランプ効率、高い演色性、長
寿命を維持しつつ、信頼性の高いの照明光学装置を提供
することができるものである。Further, the present invention can provide a highly reliable illumination optical device while maintaining high lamp efficiency, high color rendering, and long life by using the high-pressure mercury lamp of the present invention. It is.
【００９８】さらに、本発明は、光源部に本発明の照明
光学装置を用いることにより、高いランプ効率、高い演
色性、長寿命を維持しつつ、信頼性の高い画像表示装置
を提供することができるものである。Further, the present invention provides a highly reliable image display device while maintaining high lamp efficiency, high color rendering, and long life by using the illumination optical device of the present invention for a light source section. You can do it.
【図１】本発明の第１の実施の形態である高圧水銀ラン
プの正面断面図FIG. 1 is a front sectional view of a high-pressure mercury lamp according to a first embodiment of the present invention.
【図２】同じく高圧水銀ランプを用いた照明光学装置の
一部切欠斜視図FIG. 2 is a partially cutaway perspective view of an illumination optical device using the same high-pressure mercury lamp.
【図３】同じく照明光学装置を用いた画像表示装置の模
式的な図FIG. 3 is a schematic diagram of an image display device also using the illumination optical device.
【図４】同じく画像表示装置のスクリーン照度維持率の
経時変化を示す図FIG. 4 is a diagram showing a temporal change of a screen illuminance maintenance ratio of the image display device.
【図５】本発明の第２の実施の形態である高圧水銀ラン
プの要部拡大断面図FIG. 5 is an enlarged sectional view of a main part of a high-pressure mercury lamp according to a second embodiment of the present invention.
【図６】同じく画像表示装置のスクリーン照度維持率の
経時変化を示す図FIG. 6 is a diagram showing a temporal change of a screen illuminance maintenance ratio of the image display device.
【図７】本発明の第３の実施の形態である高圧水銀ラン
プの要部拡大断面図FIG. 7 is an enlarged sectional view of a main part of a high-pressure mercury lamp according to a third embodiment of the present invention.
【図８】同じく画像表示装置のスクリーン照度維持率の
経時変化を示す図FIG. 8 is a diagram showing a temporal change of a screen illuminance maintenance ratio of the image display device.
１ 発光管 ２ 発光部 ３ 封止部 ４，１９ 電極 ５ 金属箔導体 ６ａ，６ｂ 外部リード線 ７，２０ 電極軸部 ８ コイル部 ９，１８ 補強部材 １０ 反射鏡 １０ａ 反射面 １０ｂ 開口部 １０ｃ 支持筒部 １１ 口金 １２ 電力供給線 １３ 絶縁セメント １４ 光源部 １５ 集光部 １６ スクリーン １７ 投射レンズ系 DESCRIPTION OF SYMBOLS 1 Arc tube 2 Light emitting part 3 Sealing part 4, 19 electrode 5 Metal foil conductor 6a, 6b External lead wire 7, 20 Electrode shaft part 8 Coil part 9, 18 Reinforcing member 10 Reflecting mirror 10a Reflecting surface 10b Opening 10c Support cylinder Unit 11 Base 12 Power supply line 13 Insulating cement 14 Light source unit 15 Condensing unit 16 Screen 17 Projection lens system
Claims (8)
銀、不活性ガスおよびハロゲンガスが封入された発光部
と、この発光部の両端部に設けられた封止部とを有する
発光管を備え、前記電極の電極軸部が補強部材で囲繞さ
れていることを特徴とする高圧水銀ランプ。1. An arc tube having an electrode provided therein and having a light emitting portion in which mercury, an inert gas, and a halogen gas are sealed, and sealing portions provided at both ends of the light emitting portion. A high-pressure mercury lamp, wherein an electrode shaft of the electrode is surrounded by a reinforcing member.
主成分とし、カリウム、鉄、アルミニウム、カルシウ
ム、クロム、モリブデン、ニッケル、およびケイ素を含
む副成分の総含有量が４０ｐｐｍ以下、かつ前記カリウ
ムの含有量が１０ｐｐｍ以下、前記鉄の含有量が１５ｐ
ｐｍ以下であることを特徴とする請求項１記載の高圧水
銀ランプ。2. The electrode shaft component has a total content of subcomponents containing tungsten as a main component, potassium, iron, aluminum, calcium, chromium, molybdenum, nickel and silicon of 40 ppm or less, and said potassium Is 10 ppm or less, and the iron content is 15 p
2. The high-pressure mercury lamp according to claim 1, wherein the pressure is not more than pm.
状であることを特徴とする請求項１または請求項２記載
の高圧水銀ランプ。3. The high-pressure mercury lamp according to claim 1, wherein the reinforcing member has a pipe shape or a coil shape.
テン、レニウムまたはイリジウムを主成分とすることを
特徴とする請求項１〜請求項３のいずれかに記載の高圧
水銀ランプ。4. The high-pressure mercury lamp according to claim 1, wherein the reinforcing member contains molybdenum, tungsten, rhenium, or iridium as a main component.
プ状の前記補強部材の肉厚をｒ1（ｍｍ）とした場合、
１／３０Ｒ≦ｒ1≦１／２Ｒなる関係式を満たすことを
特徴とする請求項１〜請求項４のいずれかに記載の高圧
水銀ランプ。5. When the outer diameter of the electrode shaft is R (mm) and the thickness of the pipe-shaped reinforcing member is r 1 (mm),
1 / 30R ≦ r 1 ≦ 1 / 2R becomes a high-pressure mercury lamp according to any one of claims 1 to 4, characterized in that satisfies the relational expression.
ル状の前記補強部材の線径をｒ2（ｍｍ）とした場合、
１／１０Ｒ≦ｒ2≦３／４Ｒなる関係式を満たすことを
特徴とする請求項１〜請求項４のいずれかに記載の高圧
水銀ランプ。6. When the outer diameter of the electrode shaft is R (mm) and the wire diameter of the coil-shaped reinforcing member is r 2 (mm),
1 / 10R ≦ r 2 ≦ 3 / 4R becomes a high-pressure mercury lamp according to any one of claims 1 to 4, characterized in that satisfies the relational expression.
高圧水銀ランプと、放物面または楕円面からなる反射面
を有する反射鏡とが一体化されていることを特徴とする
照明光学装置。7. An illumination, wherein the high-pressure mercury lamp according to claim 1 is integrated with a reflector having a parabolic or elliptical reflecting surface. Optical device.
を集光する集光部と、前記集光部より集光された光を投
射する投射レンズ系と、前記投射レンズ系より投射され
た光が映し出されるスクリーンとを備え、前記光源部に
請求項７記載の照明光学装置を用いていることを特徴と
する画像表示装置。8. A light source unit, a condensing unit for condensing light emitted from the light source unit, a projection lens system for projecting the light condensed from the condensing unit, and a projection from the projection lens system. An image display device comprising: a screen on which reflected light is projected; and the illumination optical device according to claim 7 being used as the light source unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000152406A JP2001332213A (en) | 2000-05-24 | 2000-05-24 | High-pressure mercury lamp, illuminating optical equipment using the mercury lamp, and image display apparatus using the optical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000152406A JP2001332213A (en) | 2000-05-24 | 2000-05-24 | High-pressure mercury lamp, illuminating optical equipment using the mercury lamp, and image display apparatus using the optical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001332213A true JP2001332213A (en) | 2001-11-30 |
Family
ID=18657835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000152406A Pending JP2001332213A (en) | 2000-05-24 | 2000-05-24 | High-pressure mercury lamp, illuminating optical equipment using the mercury lamp, and image display apparatus using the optical equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001332213A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004152768A (en) * | 2002-10-30 | 2004-05-27 | General Electric Co <Ge> | Short arc high luminance mercury discharge lamp |
| CN100395653C (en) * | 2004-02-12 | 2008-06-18 | 深圳帝成科技有限公司 | Highly effective plane light source |
| JP2010129170A (en) * | 2008-11-25 | 2010-06-10 | Ushio Inc | Ultrahigh-pressure discharge lamp |
| JP2010225306A (en) * | 2009-03-19 | 2010-10-07 | Osram Melco Toshiba Lighting Kk | High-pressure discharge lamp and lighting system |
| JP2020004547A (en) * | 2018-06-26 | 2020-01-09 | 株式会社オーク製作所 | Short-arc type discharge lamp |
-
2000
- 2000-05-24 JP JP2000152406A patent/JP2001332213A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004152768A (en) * | 2002-10-30 | 2004-05-27 | General Electric Co <Ge> | Short arc high luminance mercury discharge lamp |
| CN100395653C (en) * | 2004-02-12 | 2008-06-18 | 深圳帝成科技有限公司 | Highly effective plane light source |
| JP2010129170A (en) * | 2008-11-25 | 2010-06-10 | Ushio Inc | Ultrahigh-pressure discharge lamp |
| JP2010225306A (en) * | 2009-03-19 | 2010-10-07 | Osram Melco Toshiba Lighting Kk | High-pressure discharge lamp and lighting system |
| JP2020004547A (en) * | 2018-06-26 | 2020-01-09 | 株式会社オーク製作所 | Short-arc type discharge lamp |
| JP7175109B2 (en) | 2018-06-26 | 2022-11-18 | 株式会社オーク製作所 | short arc discharge lamp |
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