JPH0433101B2 - - Google Patents
Info
- Publication number
- JPH0433101B2 JPH0433101B2 JP24772884A JP24772884A JPH0433101B2 JP H0433101 B2 JPH0433101 B2 JP H0433101B2 JP 24772884 A JP24772884 A JP 24772884A JP 24772884 A JP24772884 A JP 24772884A JP H0433101 B2 JPH0433101 B2 JP H0433101B2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- tube
- lighting
- frequency
- arc
- 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.)
- Expired
Links
- 239000004020 conductor Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000012494 Quartz wool Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/10—Shields, screens, or guides for influencing the discharge
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は、HIDランプの如き高圧放電ランプ
に関する。TECHNICAL FIELD The present invention relates to high pressure discharge lamps such as HID lamps.
（背景技術）
第１図は従来の高圧放電ランプの一例を示し、
石英ガラス等で形成された発光管１の両端には電
極２ａ，２ｂが対向して配設され、該両電極２
ａ，２ｂは封止部３ａ，３ｂに封入されたモリブ
デン箔等の金属箔４ａ，４ｂに接続されている。
金属箔４ａ，４ｂは発光管１の支持も兼ねる支持
導線５ａ，５ｂに接続されており、発光管１は固
定治具６ａ，６ｂを介して支持導線５ａ，５ｂに
固定されている。支持導線５ａ，５ｂは口金７を
介して外部回路に接続される。また、発光管１内
には希ガス及び発光物質が適量封入されており、
発光管１を被う外管８内にはガスが封入され、外
管８の内面には蛍光体９が塗布されている。(Background Art) Figure 1 shows an example of a conventional high-pressure discharge lamp.
Electrodes 2a and 2b are disposed facing each other at both ends of the arc tube 1 made of quartz glass or the like.
a, 2b are connected to metal foils 4a, 4b such as molybdenum foil sealed in sealing parts 3a, 3b.
The metal foils 4a, 4b are connected to support conductors 5a, 5b which also serve to support the arc tube 1, and the arc tube 1 is fixed to the support conductors 5a, 5b via fixing jigs 6a, 6b. Support conductors 5a and 5b are connected to an external circuit via a base 7. In addition, an appropriate amount of rare gas and luminescent substance are sealed inside the arc tube 1.
Gas is sealed in an outer tube 8 that covers the arc tube 1, and a phosphor 9 is coated on the inner surface of the outer tube 8.
かかる従来の高圧放電ランプを高周波電源で点
灯すると、発光効率が向上すると共に、点灯回路
の電子化による安定器の小型・軽量化、低損失化
が図れるという利点がある。しかし、一方では発
光管内の音速と発光管形状で決定される特定の周
波数で音響的共鳴現象が発生し、アーク柱の湾
曲、揺らぎ、立ち消え、発光管の破壊等が発生す
るといつた欠点がある。 When such a conventional high-pressure discharge lamp is lit with a high-frequency power source, there are advantages in that the luminous efficiency is improved, and the ballast can be made smaller and lighter, and its loss can be reduced by electronicizing the lighting circuit. However, on the other hand, it has the disadvantage that an acoustic resonance phenomenon occurs at a specific frequency determined by the speed of sound inside the arc tube and the shape of the arc tube, causing arc column curvature, fluctuation, extinction, and destruction of the arc tube. .
安定に点灯するためには、高圧放電ランプが安
定に点灯する周波数域を選択して点灯すれば良い
が、安定に点灯する周波数域はランプの種類によ
つて異なり、また、同一種類のランプに対して
も、ランプ固体間にはばらつきが有るため、特定
の周波数を設定するのは困難であつた。 In order to ensure stable lighting, the high-pressure discharge lamp should be lit in a stable lighting frequency range, but the stable lighting frequency range varies depending on the type of lamp, and may vary between lamps of the same type. However, it has been difficult to set a specific frequency because of variations among lamps.
また、100kHz以上の周波数での高周波点灯、
直流点灯、矩形波点灯等により音響的共鳴現象を
回避する方法が提案されているが、かかる点灯方
法においては、回路構成の複雑化や放射電波雑音
の発生等の問題がある。 In addition, high frequency lighting at a frequency of 100kHz or higher,
Methods have been proposed to avoid the acoustic resonance phenomenon by using DC lighting, square wave lighting, etc., but such lighting methods have problems such as complicating the circuit configuration and generating radiated radio noise.
（発明の目的）
本発明は、上記欠点を除去するために成された
もので、その目的とするところは、高周波点灯時
に、音響的共鳴現象による不安定なアークが発光
間に発生しない高圧放電ランプを提供するにあ
る。(Object of the Invention) The present invention has been made to eliminate the above-mentioned drawbacks, and its purpose is to discharge a high-pressure discharge in which unstable arcs due to acoustic resonance phenomenon do not occur between light emissions during high-frequency lighting. There are lamps available.
（発明の開示）
まず、音響的共鳴現象について説明する。音響
的共鳴現象は、発光管形状と封入物質で決まる固
有振動数と、入力電力の時間変化による発光管内
の圧力変動とが一致した時に定在波が立つために
生じる共鳴現象である。(Disclosure of the Invention) First, the acoustic resonance phenomenon will be explained. Acoustic resonance is a resonance phenomenon that occurs when a standing wave is created when the natural frequency determined by the arc tube shape and the enclosed material matches the pressure fluctuation within the arc tube due to time changes in input power.
発光管を円筒形状と仮定し、円筒座標系（ｒ，
θ，ｚ）を考える。なお、ｒは径方向、θは周方
向、ｚは軸方向の座標を表す。かかる場合、上記
各方向に対する共鳴現象の基本周波数Fr，Fθ，
Fzは、次のようになる。 Assuming that the arc tube is cylindrical, the cylindrical coordinate system (r,
θ, z). Note that r represents the radial direction, θ represents the circumferential direction, and z represents the axial coordinate. In such a case, the fundamental frequencies Fr, Fθ,
Fz is as follows.
ｒ方向共鳴：Fr＝3.83C／（2πR） θ方向共鳴：Fθ＝1.84C／（2πR） ｚ方向共鳴：Fz＝Ｃ／（2L） ただし Ｌは発光管長。r direction resonance: Fr=3.83C/(2πR) θ direction resonance: Fθ=1.84C/(2πR) Z direction resonance: Fz=C/(2L) however L is the arc tube length.
Ｒは発光管の半径。 R is the radius of the arc tube.
Ｃは発光管内の音速であり、管内封入物と管内
温度で決まる。 C is the sound velocity inside the arc tube, which is determined by the contents inside the tube and the temperature inside the tube.
Ｃ＝√
ｒ＝定圧比熱／定積比熱
Ｐ＝気体定数
Ｔ＝発光管内温度
Ｍ＝封入気体の平均質量
そして、この基本周波数の整数倍の周波数で共
鳴現象が発生する。音響的共鳴現象が発生する
と、共鳴現象によつて生じた力が、アーク柱自体
が有する安定放電を持続させようとする力に打ち
勝つて、アーク柱が変形する。 C=√ r=specific heat at constant pressure/specific heat at constant volume P=gas constant T=temperature inside the arc tube M=average mass of the sealed gas Then, a resonance phenomenon occurs at a frequency that is an integral multiple of this fundamental frequency. When an acoustic resonance phenomenon occurs, the force generated by the resonance phenomenon overcomes the force of the arc column itself to maintain stable discharge, causing the arc column to deform.
一般に、高周波点灯をするときには、可聴周波
数領域を避けて点灯するため、点灯周波数は数十
ＫHzになる。この周波数域で発生する音響的共鳴
現象では、径方向、周方向及びこれらに軸方向が
混成された共鳴モードが存在する。しかも、混成
モードが発生する共鳴周波数は多数存在する。 Generally, when high-frequency lighting is performed, the lighting frequency is several tens of kilohertz because the lighting is performed while avoiding the audible frequency range. In the acoustic resonance phenomenon that occurs in this frequency range, there are resonance modes in the radial direction, circumferential direction, and a combination of these resonance modes in the axial direction. Furthermore, there are many resonance frequencies at which hybrid modes occur.
そこで、本発明は発光管の管軸方向端部におけ
る音響的反射率を低下することにより、軸方向定
在波を含む混成モードを抑制し、音響的共鳴現象
を回避したものである。 Therefore, the present invention suppresses the hybrid mode including the axial standing wave and avoids the acoustic resonance phenomenon by reducing the acoustic reflectance at the ends of the arc tube in the tube axis direction.
実施例
第２図は本発明に係る発光管の一実施例を示す
もので、発光管１の管軸方向端部内面に石英ウー
ル等の柔構造体１０を設けたものである。一般
に、共鳴音波は疎密波であり、管端での反射と加
振源による音波との位相が揃つて成長するもので
ある。従つて、管端を柔構造にしておけば、管端
で音波が吸収されるため、共鳴音波は成長しきれ
なくなる。そのため、軸方向定在波を含む混成モ
ードが成長しきれなくなり、アークの安定な点灯
周波数領域が広くなる。Embodiment FIG. 2 shows an embodiment of the arc tube according to the present invention, in which a flexible structure 10 such as quartz wool is provided on the inner surface of the end of the arc tube 1 in the tube axis direction. Generally, a resonant sound wave is a compressional wave, and grows when the reflection at the tube end and the sound wave from the excitation source are in phase. Therefore, if the tube end is made to have a flexible structure, the resonant sound wave will not be able to grow completely because the sound wave will be absorbed at the tube end. Therefore, the hybrid mode including the axial standing wave cannot grow completely, and the stable arc lighting frequency range becomes wider.
（発明の効果）
本発明は上記のように、発光管の管軸方向端部
内面に石英ウール等の柔構造体を設けたことによ
り、管端での反射波を減衰させたり、反射波の位
相を不揃いにすることにより、軸方向共鳴音波に
関係する共鳴音波を制御することが可能となる。
従つて、本発明に係る高圧放電ランプを高周波電
力で点灯しても、音響的共鳴現象によるアーク柱
の湾曲、揺らぎ、立ち消え、発光管の破壊等が防
止でき、安定した点灯を維持することができる効
果がある。(Effects of the Invention) As described above, the present invention provides a flexible structure such as quartz wool on the inner surface of the end of the arc tube in the tube axis direction, thereby attenuating the reflected waves at the tube end. By making the phases irregular, it is possible to control the resonant sound waves related to the axial resonant sound waves.
Therefore, even when the high-pressure discharge lamp according to the present invention is lit with high-frequency power, it is possible to prevent arc column curvature, fluctuation, extinguishing, and destruction of the arc tube due to acoustic resonance phenomena, and to maintain stable lighting. There is an effect that can be done.
第１図は従来の高圧放電ランプの正面図、第２
図は本発明に係る発光管の一実施例を示す一部断
面の正面図である。
１……発光管、１０……柔構造体。
Figure 1 is a front view of a conventional high-pressure discharge lamp, Figure 2 is a front view of a conventional high-pressure discharge lamp;
The figure is a partially sectional front view showing an embodiment of the arc tube according to the present invention. 1... Arc tube, 10... Flexible structure.
Claims (1)
たことを特徴とする高圧放電ランプ。1. A high-pressure discharge lamp characterized in that a flexible structure is provided on the inner surface of the axial end of the arc tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24772884A JPS61126757A (en) | 1984-11-22 | 1984-11-22 | High voltage discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24772884A JPS61126757A (en) | 1984-11-22 | 1984-11-22 | High voltage discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61126757A JPS61126757A (en) | 1986-06-14 |
| JPH0433101B2 true JPH0433101B2 (en) | 1992-06-02 |
Family
ID=17167786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24772884A Granted JPS61126757A (en) | 1984-11-22 | 1984-11-22 | High voltage discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61126757A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5998940A (en) * | 1998-09-21 | 1999-12-07 | Matsushita Electric Industrial Co., Ltd. | High-pressure discharge lamp with reduced bad influence by acoustical standing wave |
-
1984
- 1984-11-22 JP JP24772884A patent/JPS61126757A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61126757A (en) | 1986-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0349147A (en) | High efficiency discharge lamp using acoustic resonance oscillation | |
| JPS581511B2 (en) | electrodeless fluorescent lamp | |
| JPH0433101B2 (en) | ||
| JPS61185857A (en) | Electrodeless discharge lamp | |
| JPS61165999A (en) | High pressure discharge lamp | |
| JP3157901B2 (en) | Metal halide lamp | |
| JPS61165944A (en) | High pressure discharge lamp | |
| JPS61124049A (en) | High pressure discharge lamp | |
| JPH0151879B2 (en) | ||
| JPS6171541A (en) | High pressure electric-discharge lamp | |
| JPS61294751A (en) | High pressure discharge lamp | |
| JPH02192608A (en) | Discharge tube structure | |
| JPS60258843A (en) | High pressure discharge lamp | |
| JPH0467742B2 (en) | ||
| JPH0316738B2 (en) | ||
| JPS60258844A (en) | High pressure discharge lamp | |
| JPH01309250A (en) | Discharge lamp | |
| JPS60117539A (en) | Electrode-less discharge lamp | |
| JPS60262343A (en) | High pressure discharge lamp | |
| JPS60262346A (en) | High pressure discharge lamp | |
| JPS6290843A (en) | High-pressure discharge lamp | |
| JP2781094B2 (en) | Electrodeless lamp | |
| JPH01221851A (en) | Arc tube for small electrodeless high luminance discharge lamp | |
| JPH03280348A (en) | Ceramic discharge lamp | |
| JPH0665023B2 (en) | High pressure discharge lamp |