JPH0636356B2 - Light emitting electron tube lighting device - Google Patents
Light emitting electron tube lighting deviceInfo
- Publication number
- JPH0636356B2 JPH0636356B2 JP26003087A JP26003087A JPH0636356B2 JP H0636356 B2 JPH0636356 B2 JP H0636356B2 JP 26003087 A JP26003087 A JP 26003087A JP 26003087 A JP26003087 A JP 26003087A JP H0636356 B2 JPH0636356 B2 JP H0636356B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electron
- cathode
- light
- light emitting
- 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 - Lifetime
Links
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- Circuit Arrangements For Discharge Lamps (AREA)
Description
【発明の詳細な説明】 ［技術分野］ 本発明は、管体に封入した光放射気体を加速電子の衝突
によって励起して発光させるようにした光放射電子管を
点灯する光放射電子管点灯装置に関するものである。Description: TECHNICAL FIELD The present invention relates to a light emitting electron tube lighting device for lighting a light emitting electron tube configured to excite a light emitting gas enclosed in a tube body by collision of accelerated electrons to emit light. Is.
［背景技術］ 従来、管内に封入した光放射気体を加速電子の衝突によ
って励起して発光させるようにした光放射電子管として
は、特開昭５７−１３０３６４号に開示されたものがあ
り、第６図に示すように、内部に低圧の光放射気体が封
入され透光性を有する管体２と、該管体２内に配設され
た熱電子放出型のカソード３と、該カソード３からの距
離が電子の平均自由行程より短い位置に配設された電子
通過性のアノード４とで構成されている。かかる光放射
電子管１は、管体２内を完全な真空とするのではなく、
水銀蒸気のような光放射気体が数mTorr程度存在する低
真空とし、熱電子放出型のカソード３より放射された電
子をカソード３、アノード４間に印加された電子加速用
電圧による電界によって加速するとともに、アノード４
をメッシュ状あるいは格子状に形成して大部分の加速電
子を通過させ、アノード４の背後空間に形成される発光
部５で水銀蒸気よりなる光放射気体に加速電子を衝突さ
せることにより、水銀を電離および励起して紫外線放射
を起こさせるようになっている。一方、管体２内面に
は、紫外線を可視光に変換する紫外線励起型の蛍光体が
塗布されており、この蛍光体によって紫外線−可視光変
換が行なわれ、透光性の管体２を介して所望の可視光が
得られるようになっている。図中、６はカソード３を加
熱するための直流電源よりなるカソード加熱用電源、
７′はカソード３、アノード４間に電子加速用の直流電
圧を印加する電子加速用電源である。2. Description of the Related Art Conventionally, as a light emitting electron tube in which a light emitting gas sealed in a tube is excited by collision of accelerated electrons to emit light, there is one disclosed in Japanese Patent Application Laid-Open No. 57-130364. As shown in the drawing, a low-pressure light emitting gas is filled in the tube body 2 having a light-transmitting property, a thermionic emission type cathode 3 disposed in the tube body 2, and a cathode 3 from the cathode 3. It is composed of an electron-permeable anode 4 arranged at a position whose distance is shorter than the mean free path of electrons. In such a light emitting electron tube 1, the inside of the tube body 2 is not completely vacuumed, but
An electron emitted from the thermionic emission type cathode 3 is accelerated by an electric field generated by an electron acceleration voltage applied between the cathode 3 and the anode 4 in a low vacuum in which a light emitting gas such as mercury vapor exists for several mTorr. With the anode 4
Is formed in a mesh shape or a lattice shape to allow most of the accelerated electrons to pass therethrough, and the accelerated electrons collide with the light emitting gas made of mercury vapor in the light emitting portion 5 formed in the space behind the anode 4 to remove mercury. It is designed to ionize and excite to emit ultraviolet radiation. On the other hand, an inner surface of the tube 2 is coated with an ultraviolet-exciting phosphor that converts ultraviolet light into visible light, and the ultraviolet-visible light conversion is performed by this phosphor, and the translucent tube 2 is used. As a result, desired visible light can be obtained. In the figure, 6 is a cathode heating power source including a DC power source for heating the cathode 3,
Reference numeral 7'denotes an electron acceleration power source for applying a DC voltage for electron acceleration between the cathode 3 and the anode 4.
ところで、このような従来例にあっては、電子を空間全
体に放出させるには、負の空間電荷を除去しなければな
らないため、本来、光放射電子管１を安定に点灯するの
に必要な電圧よりも高い電子加速用の直流電圧をカソー
ド３、アノード４間に印加しなければならず、高電圧が
カソード３、アノード４間に常に印加されているので、
発光効率が悪くなるという問題があった。By the way, in such a conventional example, in order to emit electrons into the entire space, it is necessary to remove the negative space charges. Therefore, the voltage originally required to stably turn on the light emitting electron tube 1 is required. Since a higher DC voltage for electron acceleration must be applied between the cathode 3 and the anode 4, and a high voltage is always applied between the cathode 3 and the anode 4,
There was a problem that the luminous efficiency deteriorates.
［発明の目的］ 本発明は上記の点に鑑みて為されたものであり、その目
的とするところは、発光効率の向上を図ることができる
光放射電子管点灯装置を提供することにある。[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide a light emitting electron tube lighting device capable of improving the luminous efficiency.
［発明の開示］ （構成） 本発明は、内部に低圧の光放射気体が封入され透光性を
有する管体と、該管体内に配設された熱電子放出型のカ
ソードと、該カソードからの距離が電子の平均自由行程
より短い位置に配設された電子通過性のアノードとより
なりアノードの背後空間に加速電子が光放射気体に衝突
して発光する発光部が形成される光放射電子管のカソー
ドをカソード加熱用電源にて加熱するとともに、カソー
ド、アノード間に電子加速用電源電圧を印加して成る光
放射電子管点灯装置において、発光を維持できる程度の
低圧直流電圧に、安定な点灯ができる程度の電圧を有し
周波数が１５ＫHz以上のパルス電圧を重畳したパルス重
畳電圧を電子加速用電圧としてカソード、アノード間に
印加するように電子加速用電源を形成することにより、
発光効率の向上を図ることができるようにした光放射電
子管点灯装置を提供するものである。DISCLOSURE OF THE INVENTION (Structure) The present invention relates to a translucent tubular body in which a low-pressure light emitting gas is sealed, a thermionic emission type cathode disposed in the tubular body, and A light emitting electron tube comprising an electron-transmissive anode disposed at a position whose distance is shorter than the mean free path of electrons, and a light emitting portion is formed in the space behind the anode where accelerated electrons collide with a light emitting gas to emit light. In the light emitting electron tube lighting device, which is configured by heating the cathode of the above with the cathode heating power supply and applying the power supply voltage for electron acceleration between the cathode and the anode, stable lighting can be performed at a low DC voltage enough to maintain the light emission. To form a power supply for electron acceleration so that a pulse superposition voltage having a voltage of a level that can be applied and a pulse voltage with a frequency of 15 KHz or higher is applied as a voltage for electron acceleration between the cathode and the anode. Than,
Provided is a light emitting electron tube lighting device capable of improving luminous efficiency.
（実施例） 第１図は本発明一実施例を示すもので、内部に低圧の光
放射気体が封入され透光性を有する管体２と、該管体２
内に配設された熱電子放出型のカソード３と、該カソー
ド３からの距離が電子の平均自由行程より短い位置に配
設された電子通過性のアノード４とよりなりアノード４
の背後空間に加速電子が光放射気体に衝突して発光する
発光部５が形成される光放射電子管１のカソード３をカ
ソード加熱用電源６にて加熱するとともに、カソード
３、アノード４間に電子加速用電源７電圧を印加して成
る光放射電子管点灯装置において、発光を維持できる程
度の低圧直流電圧(1０〜１５Ｖ)に、安定な点灯ができ
る程度の電圧ＶDC（１０〜数１０Ｖ)を有し周波数が１
５ＫHz以上のトリガパルス電圧Vpを重畳したパルス重畳
電圧ＶDPを電子加速用電圧としてカソード３、アノード
４間に印加するように電子加速用電源７を形成したもの
である。なお、管体２の内面には、従来例と同様に、紫
外線を所望の可視光に変換する蛍光体が塗布されてい
る。(Embodiment) FIG. 1 shows an embodiment of the present invention, in which a low pressure light emitting gas is filled in the tube body 2 having a light transmitting property, and the tube body 2.
The anode 4 is composed of a thermionic emission type cathode 3 disposed inside and an electron passing anode 4 disposed at a position where the distance from the cathode 3 is shorter than the mean free path of electrons.
The cathode 3 of the light emitting electron tube 1 in which the accelerated electron collides with the light emitting gas to emit light in the space behind the cathode 3 is heated by the cathode heating power source 6 and the electron is emitted between the cathode 3 and the anode 4. In a light emitting electron tube lighting device formed by applying a voltage of an accelerating power supply 7, a low voltage DC voltage (10 to 15 V) that can maintain light emission and a voltage VDC (10 to several tens V) that can be stably lit. Has a frequency of 1
The electron acceleration power supply 7 is formed so that a pulse superposition voltage V DP superposed with a trigger pulse voltage Vp of 5 KHz or higher is applied between the cathode 3 and the anode 4 as an electron acceleration voltage. A phosphor that converts ultraviolet rays into desired visible light is applied to the inner surface of the tubular body 2 as in the conventional example.
以下、実施例の動作について説明する。いま、光放射電
子管１のカソード３、アノード４間に印加される電子加
速用のパルス重畳電圧ＶDPは、電子加速用電源７から出
力され、低圧直流電圧ＶDCに１５ＫHz以上のパルス電圧
Vpを重畳した電圧となっており、光放射電子管１は、こ
のパルス重畳電圧ＶDPによって安定に点灯されるように
なっている。The operation of the embodiment will be described below. Now, the pulse superposition voltage V DP for electron acceleration applied between the cathode 3 and the anode 4 of the light emission electron tube 1 is output from the electron acceleration power supply 7, and the low voltage DC voltage V DC has a pulse voltage of 15 KHz or more.
The voltage is a voltage in which Vp is superposed, and the light emitting electron tube 1 is stably turned on by the pulse superposed voltage V DP .
第２図はカソード３、アノード４間に１５Ｖの低圧直流
電圧ＶDCを印加した場合の電圧波形（上段）と、光出力
波形（下段）を示しており、１５Ｖの低圧直流電圧ＶDC
を印加しただけでは、光放射電子管１は全く発光してい
ない。この光放射電子管１を点灯させるには、第３図に
示すように、周囲温度が室温の状態で２２Ｖ以上の直流
電圧を印加する必要がある。Figure 2 is a cathode 3, and the voltage waveform in a case of applying a low DC voltage V DC of 15V between the anode 4 (top) shows the optical output waveform (lower), 15V low DC voltage V DC of
However, the light emitting electron tube 1 does not emit light at all. In order to turn on the light emitting electron tube 1, as shown in FIG. 3, it is necessary to apply a DC voltage of 22 V or more in a state where the ambient temperature is room temperature.
一方、第４図(a)〜(c)は、１５Ｖの低圧直流電圧ＶDCに
１５Ｖ程度のパルス電圧Vpを重畳したパルス重畳電圧Ｖ
DP（ピーク電圧が３０Ｖ程度）で光放射電子管１を点灯
させる場合における電圧波形と光出力波形を示すもので
あり、同図(a)〜(c)は、パルス電圧Vpの周波数を変化さ
せた場合の光出力波形の違いを示している。但し、横軸
の目盛は５０μｓ／divであり、パルス電圧Vpのパルス
幅は数μsである。第４図から明らかなように、パルス
電圧Vpの周波数が高くなると光出力が増加する傾向があ
り、この光出力の増加は、パルス電圧Vpが除去された直
後から発生するアフターグローによる発光が寄与するた
めと考えられる。なお、あまり周波数を高くすると直流
点灯に近付くことになって発光に寄与しない入力が増加
することになるので、アフターグローを利用できる周波
数範囲において発光効率が向上することになる。また、
発光を安定に開始させるためのパルス電圧Vpのパルス幅
は数μs以下であっても良い。On the other hand, FIGS. 4 (a) to (c) show a pulse superposition voltage V obtained by superposing a pulse voltage Vp of about 15V on the low voltage DC voltage V DC of 15V.
The voltage waveform and the light output waveform in the case of lighting the light emitting electron tube 1 at DP (peak voltage is about 30 V) are shown in FIGS. 7A to 7C, and the frequency of the pulse voltage Vp is changed. The difference in the optical output waveform in each case is shown. However, the scale on the horizontal axis is 50 μs / div, and the pulse width of the pulse voltage Vp is several μs. As is clear from FIG. 4, the optical output tends to increase as the frequency of the pulse voltage Vp increases, and this increase in optical output is contributed by the afterglow light emission that occurs immediately after the pulse voltage Vp is removed. It is thought to be to do. It should be noted that if the frequency is raised too much, the lighting approaches DC lighting, and the input that does not contribute to light emission increases, so that the light emission efficiency improves in the frequency range in which afterglow can be used. Also,
The pulse width of the pulse voltage Vp for stably starting the light emission may be several μs or less.
第５図は、直流点灯時の発光効率を１とし、パルス電圧
Vpの周波数と発光効率の関係を示すものであり、周波数
が１５ＫHz以上において発光効率が直流点灯時に比べて
向上しており、２０ＫHz以上で発光効率が１０％以上向
上していることが分かる。Fig. 5 shows the pulse voltage when the luminous efficiency at DC lighting is 1.
It is a graph showing the relationship between the frequency of Vp and the luminous efficiency. It can be seen that the luminous efficiency is improved at a frequency of 15 KHz or more as compared with the case of DC lighting, and the luminous efficiency is improved by 10% or more at a frequency of 20 KHz or more.
［発明の効果］ 本発明は上述のように、内部に低圧の光放射気体が封入
され透光性を有する管体と、該管体内に配設された熱電
子放出型のカソードと、該カソードからの距離が電子の
平均自由行程より短い位置に配設された電子通過性のア
ノードとよりなりアノードの背後空間に加速電子が光放
射気体に衝突して発光する発光部が形成される光放射電
子管のカソードをカソード加熱用電源にて加熱するとと
もに、カソード、アノード間に電子加速用電源電圧を印
加して成る光放射電子管点灯装置において、発光を維持
できる程度の低圧直流電圧に、安定な点灯ができる程度
の電圧を有し周波数が１５ＫHz以上のパルス電圧を重畳
したパルス重畳電圧を電子加速用電圧としてカソード、
アノード間に印加するように電子加速用電源を形成した
ものであり、カソード、アノード間に印加されるパルス
電圧が除去された直後から発生するアフターグローによ
る発光を有効に利用できるので、発光効率の向上を図る
ことができるという効果がある。[Advantages of the Invention] As described above, the present invention has a translucent tube in which a low-pressure light emitting gas is sealed, a thermionic emission type cathode disposed in the tube, and the cathode. Radiation that forms a light emitting part that consists of an electron-transmissive anode placed at a position at a distance shorter than the mean free path of electrons from where the accelerated electrons collide with the light emitting gas and emits light in the space behind the anode. In a light emitting electron tube lighting device that heats the cathode of the electron tube with a power source for heating the cathode, and applies a power source voltage for electron acceleration between the cathode and the anode, stable lighting to a low DC voltage that can maintain light emission. A pulse superimposition voltage, which is a voltage with a voltage that allows the pulse acceleration and has a frequency of 15 KHz or more, is used as the electron acceleration voltage on the cathode,
The power source for electron acceleration is formed so as to be applied between the anodes, and since the light emission due to afterglow generated immediately after the pulse voltage applied between the cathode and the anode is removed can be effectively used, The effect is that it can be improved.
第１図は本発明一実施例の概略構成図、第２図乃至第５
図は同上の動作説明図、第６図は従来例の概略構成図で
ある。 １は光放射電子管、２は管体、３はカソード、４はアノ
ード、５は発光部、６はカソード加熱用電源、７は電子
加速用電源である。FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIGS.
FIG. 6 is a diagram for explaining the operation of the above, and FIG. 6 is a schematic configuration diagram of a conventional example. 1 is a light emitting electron tube, 2 is a tubular body, 3 is a cathode, 4 is an anode, 5 is a light emitting part, 6 is a cathode heating power source, and 7 is an electron acceleration power source.
Claims (1)
を有する管体と、該管体内に配設された熱電子放出型の
カソードと、該カソードからの距離が電子の平均自由行
程より短い位置に配設された電子通過性のアノードとよ
りなりアノードの背後空間に加速電子が光放射気体に衝
突して発光する発光部が形成される光放射電子管のカソ
ードをカソード加熱用電源にて加熱するとともに、カソ
ード、アノード間に電子加速用電源電圧を印加して成る
光放射電子管点灯装置において、発光を維持できる程度
の低圧直流電圧に、安定な点灯ができる程度の電圧を有
し周波数が１５ＫHz以上のパルス電圧を重畳したパルス
重畳電圧を電子加速用電圧としてカソード、アノード間
に印加するように電子加速用電源を形成したことを特徴
とする光放射電子管点灯装置。1. A light-transmissive tube body in which a low-pressure light emitting gas is sealed, a thermionic emission type cathode disposed in the tube body, and a distance from the cathode is an electron mean free angle. Power source for heating the cathode of the photo-emission electron tube, which is composed of an electron-transmissive anode arranged at a position shorter than the stroke, and in the space behind the anode, where a light-emitting part is formed in which accelerated electrons collide with a light-emission gas to emit light. In a light emitting electron tube lighting device that is heated by, and applies a power supply voltage for electron acceleration between the cathode and anode, it has a low-voltage DC voltage that can maintain light emission and a voltage that enables stable lighting. A light-emitting electron characterized in that a power supply for electron acceleration is formed so that a pulse superposed voltage having a frequency of 15 kHz or higher superposed on a pulse voltage is applied as a voltage for electron acceleration between the cathode and the anode. Lighting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26003087A JPH0636356B2 (en) | 1987-10-15 | 1987-10-15 | Light emitting electron tube lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26003087A JPH0636356B2 (en) | 1987-10-15 | 1987-10-15 | Light emitting electron tube lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01102847A JPH01102847A (en) | 1989-04-20 |
| JPH0636356B2 true JPH0636356B2 (en) | 1994-05-11 |
Family
ID=17342329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26003087A Expired - Lifetime JPH0636356B2 (en) | 1987-10-15 | 1987-10-15 | Light emitting electron tube lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636356B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4231111A2 (en) | 2022-02-17 | 2023-08-23 | Yanmar Holdings Co., Ltd. | Automatic traveling method, work vehicle, and automatic traveling system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2613686B2 (en) * | 1991-01-28 | 1997-05-28 | 松下電工株式会社 | Light emitting electron tube lighting device |
| JP4628744B2 (en) * | 2004-10-19 | 2011-02-09 | 株式会社ピュアロンジャパン | Backlight device for liquid crystal display device |
-
1987
- 1987-10-15 JP JP26003087A patent/JPH0636356B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4231111A2 (en) | 2022-02-17 | 2023-08-23 | Yanmar Holdings Co., Ltd. | Automatic traveling method, work vehicle, and automatic traveling system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01102847A (en) | 1989-04-20 |
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