JPH0745234A - External electrode discharge lamp and lamp built in equipment - Google Patents
External electrode discharge lamp and lamp built in equipmentInfo
- Publication number
- JPH0745234A JPH0745234A JP18636193A JP18636193A JPH0745234A JP H0745234 A JPH0745234 A JP H0745234A JP 18636193 A JP18636193 A JP 18636193A JP 18636193 A JP18636193 A JP 18636193A JP H0745234 A JPH0745234 A JP H0745234A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- external electrode
- bulb
- electrodes
- brightness
- 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.)
- Pending
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複写機やファクシミリ等
の原稿読取り部（スキャナ）用に好適な外部電極放電ラ
ンプ及びランプ組込み機器に係り、特に、外部電極を改
良した外部電極放電ランプ及びランプ組込み機器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external electrode discharge lamp and a lamp built-in device suitable for a document reading section (scanner) of a copying machine, a facsimile, etc., and more particularly to an external electrode discharge lamp and lamp having improved external electrodes. Regarding embedded devices.
【０００２】[0002]
【従来の技術】従来、複写機やファクシミリ等のＯＡ機
器の原稿読取り部（スキャナ）用の光源の一例としては
例えば図６で示す外部電極蛍光ランプ１がある。この外
部電極蛍光ランプ１はバルブ２内に希ガスを封入する一
方、バルブ２の内面に被着した蛍光体膜３を所定幅で軸
方向に沿って削除する等によりアパーチャ４を形成して
いる。2. Description of the Related Art Conventionally, as an example of a light source for a document reading section (scanner) of an OA device such as a copying machine or a facsimile, there is an external electrode fluorescent lamp 1 shown in FIG. In this external electrode fluorescent lamp 1, a rare gas is enclosed in a bulb 2, while an aperture 4 is formed by removing the phosphor film 3 adhered to the inner surface of the bulb 2 with a predetermined width along the axial direction. .
【０００３】そして、このアパーチャ４の図中左右に
て、一対の外部電極５ａ，５ｂをバルブ２の外面に、そ
の径方向で対向するように設けることにより、アパーチ
ャ４から他よりも強く光を照射して原稿等を照明するよ
うになっている。By providing a pair of external electrodes 5a, 5b on the outer surface of the bulb 2 so as to face each other in the radial direction on the left and right sides of the aperture plate 4 in the figure, light is emitted from the aperture plate 4 stronger than others. The document is illuminated by illuminating it.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の外部電極蛍光ランプ１では、アパーチャ４に
対して一対の外部電極５ａ，５ｂの対向方向がほぼ直角
を成すので、アパーチャ４から照射される光の明るさが
高くないという課題がある。However, in such a conventional external electrode fluorescent lamp 1, since the facing direction of the pair of external electrodes 5a and 5b is substantially perpendicular to the aperture 4, the light is emitted from the aperture 4. There is a problem that the brightness of the light is not high.
【０００５】つまり、バルブ２内では、図中複数の横線
で示すように一対の電極５ａ，５ｂの対向方向に沿って
放電が行なわれ、陽光柱が形成されるので、これら外部
電極５ａ，５ｂの内側の蛍光体膜３で最も高輝度で光る
のに対し、アパーチャ４に対向する部分の蛍光体膜３の
輝度が低い。このために、アパーチャ４から照射される
光の明るさが必ずしも高くない。That is, in the bulb 2, discharge is performed along the opposing direction of the pair of electrodes 5a and 5b as shown by a plurality of horizontal lines in the figure, and a positive column is formed, so that these external electrodes 5a and 5b are formed. While the phosphor film 3 on the inside illuminates with the highest brightness, the brightness of the part of the phosphor film 3 facing the aperture 4 is low. For this reason, the brightness of the light emitted from the aperture 4 is not necessarily high.
【０００６】そこで本発明はこのような事情を考慮して
なされたもので、その目的は、アパーチャから照射され
る光の明るさを高めることができる外部電極放電ランプ
およびランプ組込み機器を提供することにある。Therefore, the present invention has been made in consideration of such circumstances, and an object thereof is to provide an external electrode discharge lamp and a lamp-incorporated device capable of increasing the brightness of light emitted from an aperture. It is in.
【０００７】[0007]
【課題を解決するための手段】本発明は前記課題を解決
するために次のように構成される。The present invention is configured as follows in order to solve the above-mentioned problems.
【０００８】本願の請求項１に記載の発明（以下、第１
の発明という）は、バルブの外面に一対の外部電極を設
けて、所定の方向に他よりも強く光を照射せしめる外部
電極放電ランプにおいて、前記外部電極の一方を、前記
光の照射方向に対向するように配設したことを特徴とす
る。The invention according to claim 1 of the present application (hereinafter, referred to as the first
In the external electrode discharge lamp in which a pair of external electrodes are provided on the outer surface of the bulb to irradiate light in a predetermined direction more strongly than the other, one of the external electrodes is opposed to the light irradiation direction. It is characterized in that it is arranged to.
【０００９】また、本願の請求項２に記載の発明（以
下、第２の発明という）は、バルブは、他よりも強い光
の照射方向にアパーチャを形成していることを特徴とす
る。The invention according to claim 2 of the present application (hereinafter referred to as the second invention) is characterized in that the valve forms an aperture in the direction of irradiation of light stronger than the others.
【００１０】さらに、本願の請求項３に記載の発明（以
下、第３の発明という）は、アパーチャに対向する電極
は、その幅を、他方の電極の幅よりも拡幅していること
を特徴とする。Furthermore, the invention according to claim 3 of the present application (hereinafter referred to as the third invention) is characterized in that the electrode facing the aperture has a width wider than that of the other electrode. And
【００１１】さらにまた、本願の請求項４に記載の発明
（以下、第４の発明という）は、請求項１〜３のいずれ
か１項に記載の外部電極放電ランプにより、被照明体を
照明するように構成したことを特徴とする。Furthermore, the invention according to claim 4 of the present application (hereinafter referred to as the fourth invention) illuminates an object to be illuminated with the external electrode discharge lamp according to any one of claims 1 to 3. It is characterized in that it is configured to.
【００１２】[0012]
〈第１〜第４の発明〉一対の外部電極にランプ電圧が印
加されると、これら外部電極間で放電が行なわれて陽光
柱が発生し、これら外部電極の内側の蛍光体膜にて最高
輝度で発光する。<First to Fourth Inventions> When a lamp voltage is applied to a pair of external electrodes, a discharge is generated between the external electrodes to generate a positive column, and the phosphor film inside these external electrodes has the highest intensity. It emits light with brightness.
【００１３】そして、アパーチャが一方の電極に対向し
ているので、その一方の電極の内側の蛍光体膜上の高輝
度部分にアパーチャが対向する。このために、アパーチ
ャから照射される光の明るさを高めることができる。Since the aperture faces the one electrode, the aperture faces the high brightness portion on the phosphor film inside the one electrode. Therefore, the brightness of the light emitted from the aperture can be increased.
【００１４】〈第３の発明〉一般に、外部電極の幅が広
い程明るさが増すので、アパーチャに対向する一方の外
部電極の幅が他方の電極の幅よりも広い分だけ、アパー
チャの明るさを一段と高めることができる。<Third invention> Generally, the wider the width of the external electrode, the higher the brightness. Therefore, the width of the one external electrode facing the aperture is wider than the width of the other electrode. Can be further increased.
【００１５】また、アパーチャの開口幅に対してそれに
対向する外部電極の幅が狭い場合には、アパーチャか
ら、対向する外部電極を臨む場合には、その臨む角度に
よっては外部電極の内側の例えば蛍光体膜上にあって高
輝度の部分と、外部電極の内側より外れた低輝度の部分
とを臨むことになるので、輝度むらを生ずるが、アパー
チャの開口幅に対して対向外部電極の幅が十分に広い場
合には、かかる輝度むらを低減することができる。Further, when the width of the external electrode facing the aperture opening is narrower than the opening width of the aperture, when facing the external electrode facing the aperture, depending on the angle of the facing external electrode, for example, fluorescent light inside the external electrode. Since the high-luminance portion on the body film and the low-luminance portion deviated from the inside of the external electrode are exposed, luminance unevenness occurs, but the width of the counter external electrode is smaller than the opening width of the aperture. When it is sufficiently wide, such uneven brightness can be reduced.
【００１６】〈第４の発明〉アパーチャ等からの所定の
光照射方向の明るさが高い外部電極放電ランプにより被
照明体を照明するので、被照明体の照度を上げることが
できる。したがって、被照明体が原稿であるときには原
稿読取り精度を高めることができる。<Fourth Invention> Since the illuminated object is illuminated by the external electrode discharge lamp having a high brightness in the predetermined light irradiation direction from the aperture or the like, it is possible to increase the illuminance of the illuminated object. Therefore, when the illuminated object is a document, the document reading accuracy can be improved.
【００１７】[0017]
【実施例】以下、本発明の実施例を図１〜図５に基づい
て説明する。なお、図１〜図５中、同一または相当部分
には同一符号を付している。Embodiments of the present invention will be described below with reference to FIGS. 1 to 5, the same or corresponding parts are designated by the same reference numerals.
【００１８】図２は本発明の一実施例の縦断面図、図１
は図２のＩ−Ｉ線断面図であり、これらの図において、
外部電極蛍光ランプ１１は例えば直管状のガラス製バル
ブ１２内に、例えばキセノンガスを主体とする適量の希
ガスを適圧で封入しており、バルブ１２の内面には蛍光
体膜１３をほぼ全面的に被着し、この蛍光体膜１３を所
定幅で軸方向に沿って削除すること等によりアパーチャ
１４を形成している。FIG. 2 is a longitudinal sectional view of an embodiment of the present invention, FIG.
2 is a sectional view taken along line I-I of FIG. 2, and in these drawings,
The external electrode fluorescent lamp 11 has, for example, a straight tube-shaped glass bulb 12 and an appropriate amount of a rare gas mainly composed of xenon gas sealed therein at an appropriate pressure. The inner surface of the bulb 12 is almost entirely covered with a phosphor film 13. Aperture 14 is formed by, for example, removing the phosphor film 13 with a predetermined width along the axial direction.
【００１９】そして、バルブ１２の外面に、アルミテー
プ等の導電性を有する帯状の一対の外部電極１５ａ，１
５ｂを貼着しているが、その一方の電極、例えば１５ａ
をアパーチャ１４にバルブ１２の直径方向で対向させて
いる。On the outer surface of the bulb 12, a pair of conductive strip-shaped external electrodes 15a, 1 such as aluminum tape is formed.
5b is attached, but one electrode thereof, for example, 15a
Are opposed to the aperture 14 in the diameter direction of the valve 12.
【００２０】したがって、一対の外部電極１５ａ，１５
ｂ間にランプ電圧を印加すると、これら一対の外部電極
１５ａ，１５ｂ間で放電が行なわれ、バルブ１２内に陽
光柱が形成される。このために、一対の外部電極１５
ａ，１５ｂの内側の蛍光体膜１３が他の部分よりも高い
輝度で発光する。Therefore, the pair of external electrodes 15a, 15
When a lamp voltage is applied between points b, a discharge is generated between the pair of external electrodes 15a and 15b, and a positive column is formed in the bulb 12. For this purpose, the pair of external electrodes 15
The phosphor film 13 inside the a and 15b emits light with higher brightness than other portions.
【００２１】そして、アパーチャ１４はこの一方の電極
１５ａの内側の蛍光体膜１３の高輝度部に対向している
ので、アパーチャ１４から照射される光の明るさが向上
する。Since the aperture 14 faces the high brightness portion of the phosphor film 13 inside the one electrode 15a, the brightness of the light emitted from the aperture 14 is improved.
【００２２】図３は本発明の他の実施例を示しており、
これはアパーチャ１４に対向する一方の外部電極１５ａ
1 の周方向の幅を、他方の外部電極１５ｂ1 の幅よりも
拡幅した点に特徴がある。FIG. 3 shows another embodiment of the present invention,
This is one external electrode 15a facing the aperture 14.
It is characterized in that the width of 1 in the circumferential direction is wider than the width of the other external electrode 15b1.
【００２３】つまり、この実施例はアパーチャ１４に対
向する一方の外部電極１５ａ1 の幅の拡幅に応じて、こ
の外部電極１５ａ1 の内側の蛍光体膜１３で発光する高
輝度部が幅方向で拡がるので、その分、アパーチャ１４
の明るさが高くなる。That is, in this embodiment, the high-brightness portion which emits light in the phosphor film 13 inside the external electrode 15a1 expands in the width direction according to the expansion of the width of the one external electrode 15a1 facing the aperture 14. , That much, aperture 14
The brightness of the becomes higher.
【００２４】また、アパーチャ１４の開口幅に対して、
一方の外部電極１５ａ1 の幅が狭い場合には、アパーチ
ャ１４からバルブ１２内を臨む角度によっては、外部電
極１５ａ1 の内側に位置する高輝度部分とその外方に位
置する低輝度部分をそれぞれ臨むことになって輝度むら
を生ずるが、一方の外部電極１５ａ1 の幅がアパーチャ
１４の開口幅に対して十分に広い場合は、この外部電極
１５ａ1 の内側を殆ど臨むこととなり、その外方を臨む
ことが殆どなくなるので、かかる輝度むらを低減するこ
とができる。Further, with respect to the opening width of the aperture 14,
When the width of one of the external electrodes 15a1 is narrow, the high-luminance portion located inside the external electrode 15a1 and the low-luminance portion located outside of the external electrode 15a1 may be seen depending on the angle of the aperture 14 from the inside of the bulb 12. However, if the width of one of the external electrodes 15a1 is sufficiently wider than the opening width of the aperture 14, the inside of the external electrode 15a1 is almost exposed and the outside thereof is exposed. Since it almost disappears, such uneven brightness can be reduced.
【００２５】なお、アパーチャ１４は前記実施例に限定
されるものではなく、他の部分よりも強い（明るい）光
を照射する部分であればよく、例えば図４で示す反射型
アパーチャ１４ａに構成してもよい。It should be noted that the aperture 14 is not limited to the above-mentioned embodiment, and may be any portion that emits light that is stronger (brighter) than other portions. For example, the aperture 14a shown in FIG. May be.
【００２６】この反射型アパーチャ１４ａは図１等で示
す蛍光体膜１３を反射膜１６に置換すると共に、この反
射膜１６の内周面とアパーチャ１４に対応するバルブ１
２の内周面とに蛍光体膜１３ａをほぼ全面的に被着した
ものであり、この反射型アパーチャ１４ａからは他の部
分よりも強い光が照射される。The reflective aperture 14a replaces the phosphor film 13 shown in FIG. 1 and the like with a reflective film 16, and the bulb 1 corresponding to the inner peripheral surface of the reflective film 16 and the aperture 14.
The phosphor film 13a is almost entirely adhered to the inner peripheral surface of 2, and the reflection type aperture 14a irradiates light stronger than other portions.
【００２７】図５はこのように構成された外部電極蛍光
ランプ１１を複写機やファクシミリ等のＯＡ機器の原稿
読取り部（スキャナ）用の照明装置２１に適用した場合
の一例を示しており、この照明装置２１は外部電極蛍光
ランプ１１のアパーチャ１４の照射方向に、レンズ２２
等の光学系と被照明体の原稿２３等をそれぞれ配設し
て、原稿２３を照明することにより、例えばＣＣＤ（電
荷結合素子）型リニアセンサ等で読み取るようになって
いる。FIG. 5 shows an example in which the external electrode fluorescent lamp 11 thus constructed is applied to an illuminating device 21 for a document reading section (scanner) of an OA device such as a copying machine or a facsimile. The illuminating device 21 is provided with a lens 22 in the irradiation direction of the aperture 14 of the external electrode fluorescent lamp 11.
By arranging an optical system such as the above and an original 23 as an object to be illuminated and illuminating the original 23, for example, a CCD (charge coupled device) type linear sensor or the like reads the original.
【００２８】この照明装置２１は前記したようにアパー
チャ１４の照射方向の明るさを一段と高めた外部電極蛍
光ランプ１１を原稿読取り用光源として用いているの
で、ＣＣＤ型リニアセンサ等による原稿読取り速度を高
めることができる。Since the illuminating device 21 uses the external electrode fluorescent lamp 11 having the brightness in the irradiation direction of the aperture 14 further increased as the light source for reading the original as described above, the reading speed of the original by the CCD type linear sensor or the like is increased. Can be increased.
【００２９】なお、前記外部電極蛍光ランプ１１は前記
照明装置２１以外にも、所定方向に光を照射して被照明
体を照明する光源を備えるランプ組込み機器一般に光源
として組み込むことができる。The external electrode fluorescent lamp 11 can be incorporated as a light source in general in a lamp built-in device including a light source for illuminating an object to be illuminated by irradiating light in a predetermined direction in addition to the illumination device 21.
【００３０】また、ランプの放電ガスは希ガスに限定さ
れず、希ガスの代りに希ガスと水銀を封入してもよい。
さらに蛍光体膜は必須ではなく、放電による可視発光を
直接利用してもよい。The discharge gas of the lamp is not limited to the rare gas, and a rare gas and mercury may be filled instead of the rare gas.
Furthermore, the phosphor film is not essential, and visible light emission due to discharge may be directly used.
【００３１】[0031]
【発明の効果】以上説明したように本願第１〜第４の発
明は、一対の外部電極の一方を、アパーチャ等の光の照
射方向に対向するように配設したので、アパーチャに対
向する外部電極の内側にて高輝度で発光する光をアパー
チャから照射できるので、アパーチャから照射される光
の明るさを高めることができる。As described above, in the first to fourth inventions of the present application, one of the pair of external electrodes is arranged so as to face the direction of irradiation of light such as the aperture, and therefore the external electrodes facing the aperture are provided. Since light emitted with high brightness inside the electrode can be emitted from the aperture, the brightness of the light emitted from the aperture can be increased.
【００３２】また、本願第３の発明は、アパーチャに対
向する外部電極の幅を拡幅したので、アパーチャから照
射される光の明るさを一段と高めることができる。Further, in the third invention of the present application, since the width of the external electrode facing the aperture is widened, it is possible to further increase the brightness of the light emitted from the aperture.
【００３３】また、アパーチャの開口幅に対して対向外
部電極の幅を十分に広くすることにより、輝度むらを低
減することができる。Further, by making the width of the opposing external electrode sufficiently wider than the opening width of the aperture, it is possible to reduce the uneven brightness.
【００３４】さらに、第４の発明は、アパーチャ等によ
り所定の光照射方向に照射される光の明るさを一段と高
めた外部電極放電ランプにより被照明体を照明するの
で、その被照明体の照度を上げることができる。このた
めに、被照明体が原稿である場合には、原稿読取り速度
を高めることができる。Further, according to the fourth aspect of the invention, since the illuminated object is illuminated by the external electrode discharge lamp in which the brightness of the light radiated in the predetermined light irradiation direction by the aperture or the like is further enhanced, the illuminance of the illuminated object is increased. Can be raised. Therefore, when the object to be illuminated is a document, the document reading speed can be increased.
【図１】図２のＩ−Ｉ線断面図。FIG. 1 is a sectional view taken along line I-I of FIG.
【図２】本発明に係る外部電極放電ランプの一実施例の
縦断面図。FIG. 2 is a vertical sectional view of an embodiment of an external electrode discharge lamp according to the present invention.
【図３】本発明の他の実施例の縦断面図。FIG. 3 is a vertical sectional view of another embodiment of the present invention.
【図４】本発明のさらに他の実施例の縦断面図。FIG. 4 is a vertical sectional view of still another embodiment of the present invention.
【図５】本発明に係る照明装置の一実施例の要部構成
図。FIG. 5 is a configuration diagram of main parts of an embodiment of a lighting device according to the present invention.
【図６】従来例の縦断面図。FIG. 6 is a vertical sectional view of a conventional example.
【符号の説明】 １１ 外部電極蛍光ランプ １２ バルブ １３ 蛍光体膜 １４ アパーチャ １５ａ，１５ｂ，１５ａ1 ，１５ｂ1 各対の外部電極 １６ 反射膜[Description of Reference Signs] 11 External Electrode Fluorescent Lamp 12 Bulb 13 Phosphor Film 14 Aperture 15a, 15b, 15a1, 15b1 Each Pair of External Electrodes 16 Reflective Film
Claims (4)
て、所定の方向に他よりも強く光を照射せしめる外部電
極放電ランプにおいて、前記外部電極の一方を、前記光
の照射方向に対向するように配設したことを特徴とする
外部電極放電ランプ。1. In an external electrode discharge lamp in which a pair of external electrodes is provided on the outer surface of a bulb to irradiate light in a predetermined direction more strongly than other electrodes, one of the external electrodes is opposed to the light irradiation direction. An external electrode discharge lamp characterized in that it is arranged as described above.
アパーチャを形成していることを特徴とする請求項１記
載の外部電極放電ランプ。2. The external electrode discharge lamp according to claim 1, wherein the bulb has an aperture formed in a direction in which light is emitted more intensely than other bulbs.
を、他方の電極の幅よりも拡幅していることを特徴とす
る請求項１または２記載の外部電極放電ランプ。3. The external electrode discharge lamp according to claim 1, wherein the electrode facing the aperture has a width wider than that of the other electrode.
部電極放電ランプにより、被照明体を照明するように構
成したことを特徴とするランプ組込み機器。4. A lamp-incorporated device, characterized in that the external electrode discharge lamp according to claim 1 is configured to illuminate an object to be illuminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18636193A JPH0745234A (en) | 1993-07-28 | 1993-07-28 | External electrode discharge lamp and lamp built in equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18636193A JPH0745234A (en) | 1993-07-28 | 1993-07-28 | External electrode discharge lamp and lamp built in equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0745234A true JPH0745234A (en) | 1995-02-14 |
Family
ID=16187035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18636193A Pending JPH0745234A (en) | 1993-07-28 | 1993-07-28 | External electrode discharge lamp and lamp built in equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745234A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100375616B1 (en) * | 1997-04-30 | 2003-04-18 | 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 | Fluorescent lamp |
| WO2014171157A1 (en) | 2013-04-18 | 2014-10-23 | 藤井電工株式会社 | Lanyard and safety belt with said lanyard |
-
1993
- 1993-07-28 JP JP18636193A patent/JPH0745234A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100375616B1 (en) * | 1997-04-30 | 2003-04-18 | 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 | Fluorescent lamp |
| WO2014171157A1 (en) | 2013-04-18 | 2014-10-23 | 藤井電工株式会社 | Lanyard and safety belt with said lanyard |
| KR20150141949A (en) | 2013-04-18 | 2015-12-21 | 후지이 덴코 가부시키가이샤 | Lanyard and safety belt with said lanyard |
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