JPS6329929B2 - - Google Patents
Info
- Publication number
- JPS6329929B2 JPS6329929B2 JP21247981A JP21247981A JPS6329929B2 JP S6329929 B2 JPS6329929 B2 JP S6329929B2 JP 21247981 A JP21247981 A JP 21247981A JP 21247981 A JP21247981 A JP 21247981A JP S6329929 B2 JPS6329929 B2 JP S6329929B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- torr
- neon
- lamp
- discharge
- 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
- 229910052754 neon Inorganic materials 0.000 claims description 17
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 229910052743 krypton Inorganic materials 0.000 claims description 5
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052724 xenon Inorganic materials 0.000 claims description 5
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012015 optical character recognition Methods 0.000 description 1
- 230000003287 optical effect Effects 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
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
Description
【発明の詳細な説明】
この発明は低圧ネオンガス放電灯およびネオン
を主成分とした低圧希ガス放電灯とその点灯装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-pressure neon gas discharge lamp, a low-pressure rare gas discharge lamp mainly composed of neon, and a lighting device thereof.
陽光柱の発光を利用する低圧希ガス放電灯は、
螢光ランプに比べて、寿命中の光束の劣化が少な
いこと、温度依存性が少ないこと、始動後の光束
の変化が少ないことなどの特長を有している。中
でもネオンは赤色に発光するために赤色光源を使
用するフアクシミリや光学式文字読取機用光源と
して好適なものである。 A low-pressure rare gas discharge lamp that uses the light emitted from a positive column is
Compared to fluorescent lamps, it has features such as less deterioration of luminous flux during its life, less temperature dependence, and less change in luminous flux after startup. Among them, neon emits red light, so it is suitable as a light source for facsimiles and optical character readers that use red light sources.
一方、低圧希ガスの陽光柱には移動縞として知
られる発光のちらつきがある。移動縞の発生は電
流値に関係しており、下限電流と上限電流の範囲
内で発生する。 On the other hand, the positive column of low-pressure rare gases exhibits flickering luminescence known as moving stripes. The occurrence of moving stripes is related to the current value, and occurs within the range between the lower limit current and the upper limit current.
従つて移動縞の存在しない安定した発光を得る
ためには、下限電流以下あるいは上限電流以上で
点灯すれば良い。 Therefore, in order to obtain stable light emission without moving stripes, it is sufficient to turn on the lamp at a current lower than the lower limit or higher than the upper limit.
しかし下限電流以下では電流値が小さいため、
大きな光出力を得られず実用的でない。従つて上
限電流以上の電流値で点灯する必要がある。 However, below the lower limit current, the current value is small, so
It is not practical because it cannot obtain a large optical output. Therefore, it is necessary to turn on the light with a current value higher than the upper limit current.
ところで、この上限電流はPuppの限界電流と
して知られており、限界電流をIcとするとIc＝
Ｃ／Ｐで表わされる。 By the way, this upper limit current is known as Pupp's limit current, and if the limit current is Ic, then Ic=
It is expressed as C/P.
ここでＣは定数、Ｐは圧力（Torr）である。
さらにこの関係を改善したものにRutscherと
WojaczekのIc＝Ｃ／P〓がある。ネオンの場合は
Ｃ＝７、〓＝１である。 Here, C is a constant and P is pressure (Torr).
Rutscher further improved this relationship.
There is Wojaczek's Ic=C/P〓. In the case of neon, C=7, ==1.
しかし以上は直流放電（DC放電）によつて得
られた値であり、交流放電（AC放電）の場合に
は様相が異なる。AC放電では電流値が変化する
ために、ある瞬間には限界電流以上であつても、
別の瞬間には限界電流以下となる。このために限
界電流を決定することは困難である。しかし高周
波放電においては、両極性拡散時間に比べて電流
の変化が速いためにイオン密度は電流に追随せず
一定となり、限界電流が設定できるものと推定さ
れる。本発明者らはこの点に着目して研究の結
果、高周波放電における限界電流を得て、移動縞
のない一様な発光を得られるランプと高周波点灯
装置を可能としたのである。 However, the above values are obtained by direct current discharge (DC discharge), and the situation is different in the case of alternating current discharge (AC discharge). In AC discharge, the current value changes, so even if the current is above the limit at a certain moment,
At another instant, the current is below the limit. This makes it difficult to determine the limiting current. However, in high-frequency discharge, since the current changes faster than the bipolar diffusion time, the ion density does not follow the current and remains constant, so it is presumed that a limit current can be set. The inventors of the present invention have focused on this point, and as a result of their research, they have achieved a lamp and a high-frequency lighting device that can obtain the limiting current in high-frequency discharge and provide uniform light emission without moving stripes.
以下実施例によりさらに詳細に説明する。 The present invention will be explained in more detail with reference to Examples below.
熱電子放射物質を担持したフイラメントコイル
電極を両端に封着した管外径26mm、長さ436mmの
ガラス管にネオンガス1.5Torr〜15Torr封入した
ランプを多数製作した。上記ランプを駆動するた
めに5KHz〜50KHzの高周波電源を用いた。この
電源と上記ランプとの間に適当なインピーダンス
を有する限流素子を介挿した。ここでは限流素子
を兼ねて高周波電源に接続したリーケージ形出力
トランスを使用した。また限界電流を定めるため
に電流値を変化させた場合の発光波形をフオトダ
イオードで観察して陽光柱全域にわたつて一様な
発光となり完全に発光波形が安定する電流値を求
めた。 We fabricated a number of lamps in which 1.5 to 15 Torr of neon gas was filled in a glass tube with an outer diameter of 26 mm and a length of 436 mm, with filament coil electrodes carrying a thermionic emitter sealed at both ends. A high frequency power source of 5KHz to 50KHz was used to drive the above lamp. A current limiting element having an appropriate impedance was inserted between this power source and the lamp. Here, we used a leakage type output transformer that also served as a current limiting element and was connected to a high frequency power source. Furthermore, in order to determine the limiting current, we observed the light emission waveform with a photodiode when the current value was changed, and determined the current value at which the light emission was uniform over the entire positive column and the light emission waveform was completely stable.
図は上記の実験の結果得られた限界電流と封入
圧力の関係を示す図である。実験値はＯ印で示し
てあり、実線で表わされる。なお限界電流として
電流の尖頭値（Ｏ−Peak電流）を用いている。 The figure is a diagram showing the relationship between the limiting current and the sealing pressure obtained as a result of the above experiment. Experimental values are marked with an O and are represented by a solid line. Note that the peak value of current (O-Peak current) is used as the limiting current.
図から封入圧力Ｐ（Torr）が8Torr以下では、
限界電流Ic(A)はIc＝７／P1.1で表わされ、8Torr
以上ではIc＝69／P2.2で表わされる。 From the figure, when the sealing pressure P (Torr) is 8 Torr or less,
The limiting current Ic(A) is expressed as Ic=7/P 1.1 , and is 8Torr.
In the above, it is expressed as Ic=69/P 2.2 .
RuctscherとWojaczekのネオンのDC放電に関
する限界電流IcはIc＝７／Ｐであつて、図に点線
で示してある。図から低圧ではDC放電の点線と
高周波放電の実線は比較的近いが、圧力の高い領
域では差が大きくなることがわかる。この理由は
明らかではないが、高周波とDCの違いおよび
RuctscherとWojaczekの式はおもに低圧での実
験をもとにしているため圧力が高くなると精度が
悪くなるためと考えられる。 The limiting current Ic for the DC discharge of Ructscher and Wojaczek neon is Ic = 7/P and is shown in the figure as a dotted line. The figure shows that the dotted line for DC discharge and the solid line for high-frequency discharge are relatively close at low pressures, but the difference becomes larger in high pressure areas. The reason for this is not clear, but the difference between high frequency and DC and
This is thought to be because the Ructscher and Wojaczek equation is mainly based on experiments at low pressure, so the accuracy decreases as the pressure increases.
また発明者らはペニング効果を利用して放電開
始電圧を下げたランプの場合についても検討し
た。ネオンに関してはアルゴン、クリプトン、キ
セノンを微小含む場合にペニング効果を生じるこ
とが知られている。一方アルゴン、クリプトン、
キセノンそれぞれの限界電流はネオンと異なつて
いる。このためにネオンにこれらのガスを混合す
ると限界電流が変化する。また混合量が大きいほ
ど変化も大きくなる。一方ペニング効果は一般に
容積比0.1％〜１％含む場合に最大となるので、
アルゴン、クリプトン、キセノン混合比は最大１
％あれば十分である。そこで前記のネオンランプ
と同じ放電灯用ガラス管に、ネオン99容積％で、
残り１％がアルゴン、クリプトン、キセノンのい
ずれかである混合ガスを1.5Torr〜15Torr封入し
たランプを製作して限界電流を調べた。この結果
ネオン単体に比べていずれも限界電流は低下する
ことが明らかとなつた。従つてペニング効果を利
用する場合、ネオン単体の限界電流以上で点灯す
れば移動縞のない安定した放電が可能であること
が判明した。 The inventors also studied the case of a lamp in which the discharge starting voltage was lowered by utilizing the Penning effect. Regarding neon, it is known that the Penning effect occurs when it contains minute amounts of argon, krypton, and xenon. On the other hand, argon, krypton,
The limiting current of each xenon is different from that of neon. For this reason, when these gases are mixed with neon, the limiting current changes. Also, the larger the mixing amount, the larger the change. On the other hand, the Penning effect is generally maximum when it contains 0.1% to 1% by volume, so
Maximum mixing ratio of argon, krypton, and xenon is 1
% is sufficient. Therefore, we added 99% neon by volume to the same discharge lamp glass tube as the neon lamp mentioned above.
A lamp was manufactured in which the remaining 1% was filled with a mixed gas of 1.5 Torr to 15 Torr of either argon, krypton, or xenon, and the limiting current was investigated. As a result, it became clear that the limiting current was lower than that of neon alone. Therefore, it has been found that when using the Penning effect, stable discharge without moving stripes is possible if the neon is lit at a current higher than the limit current of a single neon.
ところで点灯周波数が低い場合には電子密度の
変動が生じ限界電流は変化すると考えられる。こ
の周波数の下限は明らかではないが、少なくとも
発明者らの実験範囲である5KHz以上では限界電
流は不変であつた。 By the way, when the lighting frequency is low, it is thought that the electron density fluctuates and the limiting current changes. Although the lower limit of this frequency is not clear, the limiting current remains unchanged at least above 5 KHz, which is the experimental range of the inventors.
また限界電流が電流の尖頭値（０−Peak電流）
で表わされているのは次の理由による。以上示し
た実験は全て正弦波の高周波によるものである
が、実験中に電極の損傷などにより電流の歪みが
生じる場合があつた。しかしその場合においても
限界電流を尖頭値で表示すると一定であつた。そ
こで発明者らは矩形波で実験を行つたが、この場
合も限界電流は正弦波の場合の尖頭値電流とほぼ
等しいことが判明した。これは電子密度が電流の
実効値よりむしろ尖頭値電流に影響を受けるため
と考えられる。従つて限界電流に電流の尖頭値を
用いることにより正弦波から弱干はずれた電流波
形でも使用可能となるのである。 Also, the limiting current is the peak value of the current (0-Peak current)
The reason for this expression is as follows. All of the experiments described above were conducted using high-frequency sinusoidal waves, but during the experiments there were cases in which distortion of the current occurred due to damage to the electrodes. However, even in that case, the limiting current remained constant when expressed as a peak value. Therefore, the inventors conducted an experiment using a rectangular wave, and found that the limiting current was almost equal to the peak value current in the case of a sine wave. This is thought to be because the electron density is affected by the peak current rather than the effective value of the current. Therefore, by using the peak value of the current as the limiting current, it is possible to use a current waveform that slightly deviates from a sine wave.
なお封入圧力を1.5Torr〜15Torrとしたのは
1.5Torr以下では限界電流が大きすぎ、かつ、ラ
ンプ寿命が大幅に低下して実用的でないためであ
り、また圧力が高くなると発光効率が低下するた
めに15Torr以上は実用的でないためである。 The sealing pressure was set to 1.5 Torr to 15 Torr.
This is because a limit current of 1.5 Torr or less is too large and the lamp life is significantly reduced, making it impractical. A value of 15 Torr or more is not practical, as the luminous efficiency decreases as the pressure increases.
以上説明したとうりこの発明によれば、ネオン
を主成分としたランプをその封入圧力に対応した
高周波の限界電流以上で点灯することにより、移
動縞の影響のない安定した点灯ができるという効
果がある。 As explained above, according to the present invention, by lighting a neon-based lamp at a high-frequency limit current corresponding to the sealing pressure or higher, stable lighting without the influence of moving stripes can be achieved. be.
図はランプ封入圧力と限界電流の関係図であ
る。
The figure is a diagram showing the relationship between lamp sealing pressure and limiting current.
Claims (1)
ガスまたはネオンガスを99容積％以上含み、残部
がアルゴン、クリプトン、キセノンのいずれかで
ある混合希ガスを1.5Torr〜15Torr封入してなる
ランプと、5KHz以上の高周波でかつ電流の尖頭
値Ipp(A)（０−Peak電流）がこのランプの封入圧
力Ｐ Torrに対して 1.5≦Ｐ≦8TorrのときIpp≧７／p1.1 ８＜Ｐ≦15TorrのときIpp≧69／p2.2 である高周波点灯装置とにより構成されたことを
特徴とする低圧希ガス放電灯装置。[Claims] 1. A bulb for a discharge lamp having a pair of electrodes is filled with 1.5 Torr to 15 Torr of neon gas or a mixed rare gas containing 99% by volume or more of neon gas and the remainder being either argon, krypton, or xenon. When the current peak value Ipp (A) (0-Peak current) is 1.5≦P≦8Torr with respect to the sealing pressure P Torr of this lamp, I pp ≧7/p at a high frequency of 5KHz or more. 1.1 A low-pressure rare gas discharge lamp device comprising: a high-frequency lighting device that satisfies I pp ≧69/p 2.2 when 8<P≦15Torr.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21247981A JPS58112236A (en) | 1981-12-26 | 1981-12-26 | Low pressure rare gas discharge lamp device |
| US06/451,230 US4461981A (en) | 1981-12-26 | 1982-12-20 | Low pressure inert gas discharge device |
| DE8282306972T DE3275787D1 (en) | 1981-12-26 | 1982-12-24 | A low pressure inert gas discharge lamp |
| EP82306972A EP0083241B1 (en) | 1981-12-26 | 1982-12-24 | A low pressure inert gas discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21247981A JPS58112236A (en) | 1981-12-26 | 1981-12-26 | Low pressure rare gas discharge lamp device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58112236A JPS58112236A (en) | 1983-07-04 |
| JPS6329929B2 true JPS6329929B2 (en) | 1988-06-15 |
Family
ID=16623321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21247981A Granted JPS58112236A (en) | 1981-12-26 | 1981-12-26 | Low pressure rare gas discharge lamp device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58112236A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012059666A (en) * | 2010-09-13 | 2012-03-22 | Stanley Electric Co Ltd | Fluorescent lamp |
-
1981
- 1981-12-26 JP JP21247981A patent/JPS58112236A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58112236A (en) | 1983-07-04 |
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