JPS61181055A - Metal halide lamp - Google Patents

Abstract

PURPOSE:To make an easy and reliable starting-up and moveover to increase light output power by enclosing alkali-metal halide of at least Na and the like. CONSTITUTION:Halide Na-Dy-Tl as a light-emitting material, argon as a starting-up material, Hg for obtaining almp input are enclosed in a quartz light-emitting tube 2. To both ends of the tube 2, a couple of electric poles 1, 1' are enclosed and fixed, power supplying lead wires 3, 3' are connected to the poles 1, 1', at the end portion of the tube 2, these lead wires 3, 3' are connected to the metal fittings 4, 4' which also support the light-emitting tube 2 and are connected moreover to a mouth piece 7 mounted on the outer tube 6 end through the lead wire of a stem 5. With this constitution, an auxiliary pole and an electric circuit for starting up are eliminated, reliability is increased since reaction between quartz and alkali would not take place, ensured starting-up characteristic is obtained. light output power and color-rendering characteristics are also improved, that is, the lamp performances are improved.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、メタルハライドランプに係り、特に始動性と
光出力の改善に好適な、発光管表面に彼覆する薄膜に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a metal halide lamp, and particularly to a thin film coated on the surface of an arc tube, which is suitable for improving startability and light output.

〔発明の背景〕[Background of the invention]

たとえば、′スタータ内蔵形メタルハライドランプ°（
光源・関連装置研究会資料Ｌｓ−７８−８電気学会）に
記載されている如く、一般のメタルハライドランプにお
いては、その始動を確実にする為に、パルス発生ユニッ
トを内蔵しており、かつ起動補助極も受用されている。For example, 'metal halide lamp with built-in starter°' (
As stated in the Light Source and Related Equipment Study Group Material Ls-78-8 Institute of Electrical Engineers of Japan), general metal halide lamps have a built-in pulse generation unit and start-up assistance to ensure starting. Kiwami is also accepted.

そして、生電極と起動補助極との間での石英とアルカリ
との反応を防止するために点灯中は、両極間を短絡する
か、切り離す方法がとられているが、起動補助極をなく
しても始動が容易となる手段について論述したものはな
い。In order to prevent a reaction between the quartz and alkali between the live electrode and the starting auxiliary electrode, the two electrodes are short-circuited or disconnected during lighting, but the starting auxiliary electrode is eliminated. However, there is no discussion of means for making starting easier.

〔発明の目的〕[Purpose of the invention]

したがって本発明の目的は、起動補助極及びその関連回
路をなくしても始動を容易確実にしかつ光出力を向上さ
せ得るメタルハライドランプを提供することにある。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a metal halide lamp which can be easily and reliably started and has improved light output even without the starting auxiliary pole and its related circuitry.

〔発明のａ要〕[A essential point of the invention]

起動補助極を有するために、生起両社透間で起る石英と
封入アルカリ金属との反応防止爪が必要であるが、起５
助補助極をなくしてその防止等を不要とする。その代わ
りに導電性′ａ膜により始！Ｉ！ｌ］を確実にし、こｎ
を保護する耐熱膜に熱線反射効果のある多層膜を採用す
ることにより、光出力を向上させる効果ももたせる。In order to have a starting auxiliary electrode, a claw is required to prevent the reaction between the quartz and the enclosed alkali metal that occurs between the two holes.
Eliminating the auxiliary electrode eliminates the need for prevention. Instead, it starts with a conductive 'a' film! I! l], and
By using a multilayer film with a heat ray reflective effect as the heat-resistant film that protects the light, it also has the effect of improving light output.

〔発明の実施例〕[Embodiments of the invention]

以下実施例について、第１図により説明する。 An example will be described below with reference to FIG.

発光物としてのＮａ−Ｄｙ−Ｔｔの・・ロゲン化合物、
始動ガスとしてアルゴン、ランプ人力を得るためのｔ（
ｇを封入し、両端に一対の電極１．１′を封止した石英
発光管２は、その端部に成ム１゜１′への心力供給リー
ド［３，３’　を有し、このリード線３，３′は、発光
管２の支持を兼ねた金具４．４′に接続され、さらにス
テム５のリード線を介して外球６に取りつけた口金７に
接続されている。また、金具４．４′間には、・＜ルス
を発生する始動ユニット１０．１１が接続され、発光管
２の表面には、５ｎ−０よりなる導電性薄膜８と、これ
を保護し熱線を反射するＴ　１０２　、３　ｉｏｚより
なる多層）漠９が４層ずつ８・層交互に施しである。４
００Ｗのこの実施例のメタルハライドランプ（Ａ）にお
ける効果を、従来の起動補助回路性で、導電性薄膜の付
していないランプ（Ｂ）、および、起動補助回路なしで
、導電性？４模および保護なしのランプ（Ｃ）との比較
を表１に示す。なお、（Ｂ）、（Ｃ）のランプは保畠膜
付である。Na-Dy-Tt as a luminescent substance...rogen compound,
Argon as starting gas, t(t) to obtain lamp power
The quartz arc tube 2, in which a pair of electrodes 1.1' are sealed at both ends, has leads [3,3'] for supplying mental force to the membrane 1.1' at its ends. The wires 3, 3' are connected to a metal fitting 4.4' which also serves to support the arc tube 2, and are further connected to a base 7 attached to the outer bulb 6 via a lead wire of the stem 5. Further, a starting unit 10.11 that generates . A multi-layer structure consisting of T 102 , 3 Ioz reflecting the light is applied alternately with 4 layers each and 8 layers. 4
The effect of the metal halide lamp (A) of this example of 00W is compared to the lamp (B) with a conventional starting auxiliary circuit and no conductive thin film, and the conductive lamp without the starting auxiliary circuit (B). A comparison with Model 4 and the unprotected lamp (C) is shown in Table 1. Note that the lamps in (B) and (C) are equipped with a protective film.

表　　　１ また、導電性薄膜にＡｇを吏用したものも同様な効果が
あったっそして、ランプ（Ａ）において、熱線反射膜９
の層数を変えたときの特性について表２に示す。Table 1 Also, similar effects were obtained when Ag was used in the conductive thin film.
Table 2 shows the characteristics when changing the number of layers.

表１．２により明らかなように、本発明によるランプは
補助極なしでも諸特性を満すことができる。そして、反
射膜のノー故はそれぞれ３ノ一以上であればなお良好と
なることがわかる。As is clear from Table 1.2, the lamp according to the invention can meet the various characteristics even without an auxiliary electrode. It can be seen that if the number of failures of the reflective film is 3 or more, it will be even better.

なお、導電膜材は３ｎ−０に限らず池の金属あるいは金
属酸化膜でも良く、さらに反射膜もｒ　＋　０２　。Note that the conductive film material is not limited to 3n-0, but may be a metal or metal oxide film, and the reflective film is also r + 02.

８ｉ０．以外のものを用いても良いことは言うまでもな
い。8i0. It goes without saying that other materials may be used.

〔発明の効果〕〔Effect of the invention〕

以上述べた如く本発明によれば、起動補助極およびその
回路をなくし、石英とアルカリの反応が全く起らなくな
り信頼性が増すとともに、確実な始動性が得られるとと
もに、光出力および演色性が改善できランプの性能向上
効果がある。As described above, according to the present invention, the starting auxiliary electrode and its circuit are eliminated, and the reaction between quartz and alkali does not occur at all, increasing reliability, ensuring reliable starting, and improving light output and color rendering. This can be improved and has the effect of improving lamp performance.

同様なことを水銀灯に応用しても、起動補助極が省略で
きることは当然である。It goes without saying that if the same thing were applied to a mercury lamp, the starting auxiliary pole could be omitted.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の１実施例を説明するだめのランプの概
略図である。 １・・・成極、２・・・石英製発光管、８・・・導電性
薄膜、９・・・熱線反射膜。FIG. 1 is a schematic diagram of a redundant lamp illustrating one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Polarization, 2... Quartz arc tube, 8... Conductive thin film, 9... Heat ray reflective film.

Claims (1)

【特許請求の範囲】 １、両端に電極を封入し、起動補助極を有しない石英発
光管の表面に、導電性薄膜と、これを保護しかつ熱線を
反射する多層薄膜とを備え、上記発光管内には、少なく
ともＮａなどアルカリ金属のハロゲン化合物が封入され
ていることを特徴とするメタルハライドランプ。 ２、上記導電性薄膜が金属又は、金属の酸化物であるこ
とを特徴とする第１項のメタルハライドランプ。 ３、上記熱線を反射する保護膜がＴｉＯ＿２、ＳｉＯ＿
２から形成されていることを特徴とする第１項のメタル
ハライドランプ。 ４、上記熱線反射するＴｉＯ＿２、ＳｉＯ＿２の膜の層
数がそれぞれ３層以上であることを特徴とする第３項の
メタルハライドランプ。[Claims] 1. A quartz arc tube with electrodes sealed at both ends and no starting auxiliary electrode is provided with a conductive thin film and a multilayer thin film that protects the conductive thin film and reflects heat rays on the surface of the quartz arc tube, A metal halide lamp characterized in that at least a halogen compound of an alkali metal such as Na is sealed in the tube. 2. The metal halide lamp according to item 1, wherein the conductive thin film is a metal or a metal oxide. 3. The protective film that reflects the heat rays is TiO_2, SiO_
2. The metal halide lamp of item 1, characterized in that it is formed from 2. 4. The metal halide lamp according to item 3, wherein the number of layers of the TiO_2 and SiO_2 films that reflect heat rays is three or more.