JPH02227954A - Metal halide lamp - Google Patents
Metal halide lampInfo
- Publication number
- JPH02227954A JPH02227954A JP4774489A JP4774489A JPH02227954A JP H02227954 A JPH02227954 A JP H02227954A JP 4774489 A JP4774489 A JP 4774489A JP 4774489 A JP4774489 A JP 4774489A JP H02227954 A JPH02227954 A JP H02227954A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust pipe
- pipe sealing
- sealing cut
- cut section
- metal halide
- 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
- 229910001507 metal halide Inorganic materials 0.000 title claims description 21
- 150000005309 metal halides Chemical class 0.000 title claims description 21
- 238000007789 sealing Methods 0.000 claims abstract description 52
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 5
- 229910052753 mercury Inorganic materials 0.000 claims description 5
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- DKSXWSAKLYQPQE-UHFFFAOYSA-K neodymium(3+);triiodide Chemical compound I[Nd](I)I DKSXWSAKLYQPQE-UHFFFAOYSA-K 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はメタルハライドランプ、特に液晶プロジュクシ
ョンテレビやＯＨＰ等の光学機器用のメタルハライドラ
ンプに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a metal halide lamp, particularly a metal halide lamp for use in optical equipment such as liquid crystal projection televisions and OHPs.
従来の技術
ＯＨＰ、スライド映写機、液晶プロジュクションテレビ
等の光学機器に使用する光源としては、従来、ハロゲン
電球やキセノンランプが用いられてきたが、これらに代
わる高効率・長寿命光源としてメタルハライドランプが
使用されるようになってきた。Conventional Technology Halogen bulbs and xenon lamps have traditionally been used as light sources for optical equipment such as OHPs, slide projectors, and LCD projection televisions, but metal halide lamps are an alternative high-efficiency, long-life light source. has come to be used.
第３図はかかる光学機器用メタルハライドランプの一例
を示す。同図において、１は石英ガラスよりなる発光管
であり、一対の電極２ａ、２ｂが発光管両端の封着部３
ａ、３ｂにおいて気密封着されている。発光管１内には
所定量の希ガス、水銀および金属ハロゲン化物が封入さ
れている。４ ａ ＋４ｂは電極近傍の発光管外面に塗
布された保温膜であり、電極後方部のいわゆる最冷点部
の温度を適切な値に保つ働きをする。５は排気管封止切
り部であり、発光管１の中央に位置している。６は発光
管１を収容する外管であり、両端に圧潰封止部７ａ、７
ｂおよび電極２ａ、２ｂと電気的に接続されている口金
８ａ、８ｂを有する。なお、外管６内は高真空に排気さ
れており、不純ガスを除去するためにゲッタ９が配設さ
れている。FIG. 3 shows an example of such a metal halide lamp for optical equipment. In the figure, 1 is an arc tube made of quartz glass, and a pair of electrodes 2a and 2b are connected to sealing parts 3 at both ends of the arc tube.
A and 3b are hermetically sealed. Predetermined amounts of rare gas, mercury, and metal halides are sealed inside the arc tube 1 . 4a + 4b is a heat insulating film applied to the outer surface of the arc tube near the electrodes, and serves to maintain the temperature of the so-called coldest spot at the rear of the electrodes at an appropriate value. Reference numeral 5 denotes an exhaust pipe sealing cut portion, which is located at the center of the arc tube 1. Reference numeral 6 denotes an outer tube that houses the arc tube 1, and has crushed sealing portions 7a, 7 at both ends.
b, and caps 8a, 8b electrically connected to electrodes 2a, 2b. Note that the inside of the outer tube 6 is evacuated to a high vacuum, and a getter 9 is provided to remove impurity gas.
かかるランプをＯＨＰ、スライド映写機、液晶プロジュ
クションテレビ等の光学機器に使用する場合、通常はラ
ンプからの光を有効に使用するために、反射鏡や集光レ
ンズあるいはこれらを組み合わせた光学系の中にランプ
を組み込んでいるが、画面上の輝度の均一性や、歪みの
ない画像を得るには所定の配光パターンが得られるよう
に精密な光学系の設計を行う必要がある。When such lamps are used in optical equipment such as OHPs, slide projectors, and LCD projection televisions, in order to effectively use the light from the lamps, a reflector, a condensing lens, or an optical system that combines these is usually used. Although a lamp is built in, it is necessary to design a precise optical system to obtain a predetermined light distribution pattern in order to ensure uniform brightness on the screen and to obtain a distortion-free image.
発明が解決しようとする課題
しかしながら、かかるランプを精密な光学系に組み込ん
だ場合、発光管中央部に位置する排気管封止切り部の影
響によって光路が乱れ、所望の配光パターンを得ること
ができないことが多い。Problems to be Solved by the Invention However, when such a lamp is incorporated into a precise optical system, the optical path is disturbed by the influence of the exhaust pipe sealing cut located at the center of the arc tube, making it difficult to obtain the desired light distribution pattern. There are many things that cannot be done.
すなわち、上記排気管封止切り部は、本来発光管を形成
する石英管と排気管との接合部であって、この部分にお
いて発光管形状に乱れを生じている。さらに、排気管を
封止切ることにより、この部分の肉厚が他の部分に比べ
て厚くなるのが通常である。これら形状、肉厚の乱れが
原因となって、発光管から放射される光が複雑に屈折・
散乱され、その結果、画面上において局部的な影の発生
や画像の歪みを生じる。That is, the exhaust pipe sealing cut portion is a joint between the quartz tube and the exhaust pipe that originally form the arc tube, and the shape of the arc tube is disturbed at this portion. Furthermore, by sealing and cutting the exhaust pipe, the wall thickness of this part is usually thicker than other parts. These irregularities in shape and wall thickness cause the light emitted from the arc tube to be refracted and refracted in a complicated manner.
The light is scattered, resulting in localized shadows and image distortion on the screen.
本発明は上記の問題を解決するためになされたものであ
り、光学系に組み込んだ際に所望の配光パターンが容易
に得られるメタルハライドランプを提供するものである
。The present invention has been made to solve the above problems, and provides a metal halide lamp that can easily obtain a desired light distribution pattern when incorporated into an optical system.
課題を解決するための手段
本発明のメタルハライドランプは、両端に電極を封着し
て封着部を形成し、かつ内部に希ガス。Means for Solving the Problems The metal halide lamp of the present invention has electrodes sealed at both ends to form a sealed part, and a rare gas inside.
水銀および少なくとも一種の金属ハロゲン化物を封入し
てなる発光管を有するメタルハライドランプであって、
前記発光管の排気管封止切り部を前記封着部の一方に近
接させて配置し、かつ前記排気管封止切り部側の封着部
から前記排気管封止切り部までの範囲にわたる前記発光
管外面に保温膜を塗布したものである。A metal halide lamp having an arc tube sealed with mercury and at least one metal halide,
The exhaust pipe sealing cut portion of the arc tube is arranged close to one of the sealing portions, and the exhaust pipe sealing cut portion extends from the sealing portion on the side of the exhaust pipe sealing cut portion to the exhaust pipe sealing cut portion. A heat-retaining film is applied to the outer surface of the arc tube.
作用
上記の構成を採用することにより、排気管封止切り部に
よって屈折・散乱された光が保温膜によって遮へいされ
、これによって所望の配光パターンを得ることができる
。Effect By employing the above configuration, the light refracted and scattered by the exhaust pipe sealing cut portion is shielded by the heat insulating film, thereby making it possible to obtain a desired light distribution pattern.
実施例
以下、本発明の一実施例について、図面を参照しつつ説
明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は本発明にかかる２５０Ｗメタルハライドランプ
を示すものである。同図において、１０は石英ガラスよ
りなる発光管であって、一対の電極１１ａ、ｌｌｂが発
光管両端の封着部１２ａ。FIG. 1 shows a 250W metal halide lamp according to the present invention. In the figure, reference numeral 10 denotes an arc tube made of quartz glass, and a pair of electrodes 11a and llb are sealed portions 12a at both ends of the arc tube.
１２ｂにおいて気密封着されている。なお、電極間距離
は１０ｍｍ、発光管最大内径は１２覗である。発光管１
０の内部には水銀、始動用希ガスとしてのアルゴン、よ
う化ネオジムおよびよう化セシウムがそれぞれ所定量封
入されている。１３は排気管封止切り部であって、一方
の封着部１２ａに近接して配置されている。また、１４
ａは発光管１０の外面に塗布された酸化ジルコニウムを
主成分とする保温膜であって、排気管封止切り部側の封
着部１２ａから排気管封止切り部１３までの範囲にわた
って塗布されている。また、１４ｂは他方の封着部１２
ｂ側に塗布された保温膜であり、その塗布範囲は保温Ｈ
１４ａと対称になっている。It is hermetically sealed at 12b. Note that the distance between the electrodes was 10 mm, and the maximum inner diameter of the arc tube was 12 mm. Luminous tube 1
0 is filled with predetermined amounts of mercury, argon as a starting rare gas, neodymium iodide, and cesium iodide. Reference numeral 13 denotes an exhaust pipe sealing cut portion, which is disposed close to one sealing portion 12a. Also, 14
A is a heat insulating film mainly composed of zirconium oxide applied to the outer surface of the arc tube 10, and is applied over a range from the sealing part 12a on the exhaust pipe sealing cut side to the exhaust pipe sealing cut part 13. ing. Moreover, 14b is the other sealing part 12
It is a heat-retaining film applied to the b side, and its application range is heat-retaining H.
It is symmetrical to 14a.
１５は外径２２醜の石英ガラスからなる外管であり、両
端に圧潰封止部１６ａ、１６ｂおよび電極１１ａ、ｌｌ
ｂに電気的にそれぞれ接続された口金１７ａ、１７ｂを
有する。なお、外管１５内は高真空に排気されており、
不純ガスを吸着するためのゲッタ１８が配設されている
。Reference numeral 15 designates an outer tube made of quartz glass with an outer diameter of 22, and has crushed sealing portions 16a, 16b and electrodes 11a, ll at both ends.
It has caps 17a and 17b electrically connected to the caps 17a and 17b, respectively. Note that the inside of the outer tube 15 is evacuated to a high vacuum.
A getter 18 is provided to adsorb impure gas.
ここで、排気管封止切り部１３は一方の封着部１２ａに
近接して配置されており、かつ保温膜１４ａが封着部１
２ａから排気管封止切り部１３までの範囲にわたって塗
布されているので、排気管封止切り部１３によって屈折
・散乱された光は保温膜１４によって遮へいされ、配光
パターンに乱れを生じることはな（なっている。Here, the exhaust pipe sealing cut portion 13 is arranged close to one of the sealing portions 12a, and the heat insulating film 14a is disposed close to the sealing portion 12a.
Since the coating is applied over the range from 2a to the exhaust pipe sealing cut 13, the light refracted and scattered by the exhaust pipe sealing cut 13 is blocked by the heat insulating film 14, and the light distribution pattern is not disturbed. (becomes)
次に、本発明の具体的な例を説明する。Next, a specific example of the present invention will be explained.
第２図は、本発明にかかるランプおよび従来のランプに
ついて、発光管管軸および排気管封止切り部を通る平面
上におけるランプの配光特性を比較したものである。同
図において、０度および１８０度はランプの管軸方向を
示し、また曲線Ａは本発明にかかるランプ、曲線Ｂは従
来のランプの各配光曲線を示す。同図から明らかなよう
に、従来のランプでは、曲線ＢのＣの部分において排気
管封止切り部における光の屈折・散乱に起因する配光の
乱れを生じているのに対し、本発明にかかるランプでは
曲線Ａに示すとおり、このような配光の乱れはみられな
かった。これは、気管封止切り部を一方の封着部に近接
して配置し、かつ保温膜を上記封着部から排気管封止切
り部までの範囲に塗布することにより、排気管封止切り
部によって屈折・散乱された光を保温膜１４ａによって
遮へいしているためである。FIG. 2 compares the light distribution characteristics of the lamp according to the present invention and a conventional lamp on a plane passing through the arc tube axis and the exhaust pipe sealing cut. In the figure, 0 degrees and 180 degrees indicate the tube axis direction of the lamp, curve A indicates the light distribution curve of the lamp according to the present invention, and curve B indicates the light distribution curve of the conventional lamp. As is clear from the figure, in the conventional lamp, the light distribution is disturbed at part C of curve B due to the refraction and scattering of light at the exhaust pipe sealing cut, whereas in the present invention As shown in curve A, such a disturbance in light distribution was not observed in such a lamp. This is achieved by arranging the trachea sealing cut close to one of the sealing parts and applying a heat insulating film to the area from the sealing part to the exhaust pipe sealing cut. This is because the heat insulating film 14a shields light that is refracted and scattered by the parts.
なお、上記実施例においては保温膜を発光管の両側に塗
布したが、反射鏡や集光レンズの設計によっては保温膜
を排気管封止切り部側にのみ塗布することも可能である
。また、発光管・ランプの形状、封入物組成、ランプ電
力等についても、上記実施例に限定されないことはいう
までもない。In the above embodiment, the heat insulating film was applied to both sides of the arc tube, but depending on the design of the reflecting mirror and the condenser lens, the heat insulating film could be applied only to the exhaust pipe sealing cut side. Further, it goes without saying that the shape of the arc tube/lamp, the composition of the filler material, the lamp power, etc. are not limited to the above embodiments.
発明の詳細
な説明したように、本発明は両端に電極を封着し、かつ
内部に希ガス、水銀および少なくとも一種の金属ハロゲ
ン化物を封入してなる発光管を有するメタルハライドラ
ンプにおいて、前記発光管の排気管封止切り部を前記封
着部の一方に近接させて配置し、かつ前記排気管封止切
り部側の封着部から前記排気管封止切り部までの範囲に
わたる前記発光管外面に保温膜を塗布することにより、
排気管封止切り部によって屈折、散乱された光が保温膜
によって遮へいされ、所望の配光パターンが容易に得ら
れるメタルハライドランプを提供することができるもの
である。As described in detail, the present invention provides a metal halide lamp having an arc tube with electrodes sealed at both ends and a rare gas, mercury, and at least one metal halide sealed inside. an exhaust pipe sealing cut portion is disposed close to one of the sealing portions, and the outer surface of the arc tube extends from the sealing portion on the side of the exhaust pipe sealing cut portion to the exhaust pipe sealing cut portion. By applying a heat-retaining film to
It is possible to provide a metal halide lamp in which light refracted and scattered by the exhaust pipe sealing cut is shielded by the heat insulating film, and a desired light distribution pattern can be easily obtained.
第１図は本発明の一実施例であるメタルハライドランプ
の正面図、第２図は本発明のメタルハライドランプと従
来構成のメタルハライドランプの配光特性を比較して示
す特性図、第３図は従来例のメタルハライドランプを示
す正面図である。
１０・・・・・・発光管、１２ａ、１２ｂ・・・・・・
電極封着部、１３・・・・・・排気管封止切り部、１４
ａ・・・・・・保温膜。Fig. 1 is a front view of a metal halide lamp which is an embodiment of the present invention, Fig. 2 is a characteristic diagram comparing the light distribution characteristics of the metal halide lamp of the present invention and a metal halide lamp with a conventional structure, and Fig. 3 is a conventional It is a front view showing an example metal halide lamp. 10... Arc tube, 12a, 12b...
Electrode sealing part, 13... Exhaust pipe sealing cut part, 14
a...Heat insulation film.
Claims (1)
ス、水銀および少なくとも一種の金属ハロゲン化物を封
入してなる発光管を有するメタルハライドランプにおい
て、前記発光管の排気管封止切り部を前記封着部の一方
に近接させて配置し、かつ前記排気管封止切り部側の封
着部から前記排気管封止切り部までの範囲にわたる前記
発光管外面に保温膜を塗布したことを特徴とするメタル
ハライドランプ。In a metal halide lamp having an arc tube formed by sealing electrodes at both ends to form a sealed part and sealing a rare gas, mercury, and at least one metal halide inside, the exhaust pipe of the arc tube is sealed. The cut portion is arranged close to one of the sealing portions, and a heat insulating film is applied to the outer surface of the arc tube over a range from the sealing portion on the side of the exhaust pipe sealing cut portion to the exhaust pipe sealing cut portion. A metal halide lamp characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4774489A JP2730635B2 (en) | 1989-02-28 | 1989-02-28 | Metal halide lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4774489A JP2730635B2 (en) | 1989-02-28 | 1989-02-28 | Metal halide lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02227954A true JPH02227954A (en) | 1990-09-11 |
| JP2730635B2 JP2730635B2 (en) | 1998-03-25 |
Family
ID=12783859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4774489A Expired - Fee Related JP2730635B2 (en) | 1989-02-28 | 1989-02-28 | Metal halide lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730635B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008140639A (en) * | 2006-11-30 | 2008-06-19 | Matsushita Electric Ind Co Ltd | Lamp unit, and projector |
-
1989
- 1989-02-28 JP JP4774489A patent/JP2730635B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008140639A (en) * | 2006-11-30 | 2008-06-19 | Matsushita Electric Ind Co Ltd | Lamp unit, and projector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2730635B2 (en) | 1998-03-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |