JPH0495337A - Flat fluorescent lamp - Google Patents
Flat fluorescent lampInfo
- Publication number
- JPH0495337A JPH0495337A JP20558390A JP20558390A JPH0495337A JP H0495337 A JPH0495337 A JP H0495337A JP 20558390 A JP20558390 A JP 20558390A JP 20558390 A JP20558390 A JP 20558390A JP H0495337 A JPH0495337 A JP H0495337A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- flat
- discharge
- anode
- glass plate
- 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
- 239000011521 glass Substances 0.000 claims abstract description 22
- 238000005452 bending Methods 0.000 claims abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、ビデオカメラのビューファインダ、液晶テレ
ビ等の液晶表示装置のバックライトとして使用される平
面型蛍光灯に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flat fluorescent lamp used as a backlight for a viewfinder of a video camera or a liquid crystal display device such as a liquid crystal television.
(従来の技術)
液晶表示装置は、液晶表示パネルを背面から照射するバ
ックライトを必要とし、このバックライトは液晶表示パ
ネルを全体に亘り一様な明るさで照明することが要求さ
れる。(Prior Art) A liquid crystal display device requires a backlight that illuminates a liquid crystal display panel from behind, and this backlight is required to illuminate the entire liquid crystal display panel with uniform brightness.
出願人は以前、平面的な光源を実現するために第4図に
示す平面型蛍光灯を提案した(特開昭60−18915
4号)。The applicant previously proposed a flat fluorescent lamp shown in Fig. 4 in order to realize a flat light source (Japanese Patent Application Laid-Open No. 18915/1983).
No. 4).
上記平面型蛍光灯は、内面に蛍光体(21)(31)を
塗布した前面ガラス板(2)と背面ガラス板(3)とを
枠体(4)を挟んで気密に接合し、扁平容器(1)を形
成する。The above-mentioned flat fluorescent lamp is a flat container made by airtightly joining a front glass plate (2) and a rear glass plate (3) with a frame (4) in between, the inner surfaces of which are coated with phosphors (21) and (31). (1) is formed.
容器(1)内は放電空間となり、アルゴンガス及び水銀
蒸気を封入している。The inside of the container (1) serves as a discharge space, and is filled with argon gas and mercury vapor.
容器内には一対の電極(5)(5)を対向配備し、各電
極に接続したリード片(51)(5])を容器の外部に
臨出させている。Inside the container, a pair of electrodes (5) (5) are arranged facing each other, and lead pieces (51, (5)) connected to each electrode are exposed to the outside of the container.
電極に交流電圧を印加することによって、電極(5)(
5)間に放電が生じ、アルゴンガスと水銀が紫外線を発
する。この紫外線が蛍光体を励起して可視光線を発する
。By applying an alternating voltage to the electrode, the electrode (5) (
5) A discharge occurs between them, and the argon gas and mercury emit ultraviolet light. This ultraviolet light excites the phosphor and emits visible light.
発光効率が高く、均一な平面状放電を行なうには、電子
放出量を多くする必要があり、このため電極(5)は面
積の広い所謂ホローカソード型であることが望ましい。In order to achieve high luminous efficiency and uniform planar discharge, it is necessary to increase the amount of electron emission, and for this reason, it is desirable that the electrode (5) be of a so-called hollow cathode type with a large area.
又、両電極は交流電圧の印加によって、陰極と陽極に交
互に切り替わるため、電極は同形状に形成することが望
ましい。Further, since both electrodes are alternately switched to a cathode and an anode by application of an alternating current voltage, it is desirable that the electrodes be formed in the same shape.
そのため両電極(5)(5)は長手方向の上下縁を直角
に屈曲して断面コ字状に形成されている。Therefore, both electrodes (5) (5) have upper and lower longitudinal edges bent at right angles to form a U-shaped cross section.
(発明が解決しようとする課題)
ビデオカメラの小型化のために、1インチ以下に縮小さ
れた小型液晶ビューファインターか要求されている。(Problems to be Solved by the Invention) In order to miniaturize video cameras, there is a demand for compact liquid crystal viewfinders that are reduced to 1 inch or less.
ところが1インチサイズの平面型蛍光灯であっても、前
記電極(5)の幅W、は3 mm程度は必要であり、電
極の幅に対応して、平面型蛍光灯の未発光部の幅W2が
大きくなり、ビューファインダーの取付けに支障を来す
ことがある。However, even for a 1-inch flat fluorescent lamp, the width W of the electrode (5) needs to be approximately 3 mm, and the width of the non-light-emitting part of the flat fluorescent lamp must be adjusted to correspond to the width of the electrode. W2 becomes large and may interfere with viewfinder installation.
尚、扁平ガラス容器内に一対の帯状電極を対向配備した
平面型蛍光灯も提案されているか、これは電極面積を大
きく出来ないため、電極間に均一に放電しない問題があ
る。Incidentally, a flat fluorescent lamp has also been proposed in which a pair of strip electrodes are disposed facing each other in a flat glass container, but since the area of the electrodes cannot be increased in this lamp, there is a problem that discharge is not uniform between the electrodes.
本発明は、電極間に均一に放電が生じ、然も未発光部の
幅を小さくできる平面型蛍光灯を明らかにするものであ
る。The present invention discloses a flat fluorescent lamp in which discharge occurs uniformly between electrodes, and the width of the non-emission area can be reduced.
(課題を解決する手段)
本発明の平面型蛍光灯は、前面ガラス板と背面ガラス板
との間に扁平な放電空間を形成し、該放電空間に一対の
電極を平行に配備した平面型蛍光灯に於て、一方の電極
(6)は平板状に形成されてガラス板(2)と直交する
面内に配置し、他方の電極(5)は帯状体を長手方向に
沿って屈曲或は湾曲して前記帯状電極(6)よりも表面
積が大きなホローカソード型電極となし、該ホローカソ
ード型電極(5)を陰極、他方の平板状電極(6)を陽
極としている。(Means for Solving the Problems) The flat fluorescent lamp of the present invention has a flat discharge space formed between a front glass plate and a rear glass plate, and a pair of electrodes arranged in parallel in the discharge space. In the lamp, one electrode (6) is formed into a flat plate and placed in a plane perpendicular to the glass plate (2), and the other electrode (5) is formed by bending or bending the strip along the longitudinal direction. It is curved to form a hollow cathode type electrode having a larger surface area than the strip electrode (6), the hollow cathode type electrode (5) is used as a cathode, and the other flat electrode (6) is used as an anode.
陽極となる電極は、平板状電極に代えて棒状に形成され
た電極を配備しても可い。As the electrode serving as the anode, a rod-shaped electrode may be provided instead of the flat plate electrode.
(作用)
陰極に負電圧のパルス、陽極に常時零電位を印加し、又
は陰極に常に零電位、陽極には正電圧のパルスを印加す
る。(Operation) A pulse of negative voltage is always applied to the cathode and zero potential is applied to the anode, or a pulse of zero potential is always applied to the cathode and a pulse of positive voltage is applied to the anode.
平面状放電の維持時間は、およそ50μsec以下であ
るから、平面状放電が崩れてアーク状の集中状態に入る
前に放電を停止し、数10μsec〜数100μsec
後、再びパルスを印加し、平面状放電を発生させ、この
断続状の電圧印加を続けるで、平面状放電を維持する。Since the maintenance time of a planar discharge is about 50 μsec or less, the discharge is stopped before the planar discharge collapses and enters an arc-like concentrated state, and the maintenance time is approximately 50 μsec or less.
After that, a pulse is applied again to generate a planar discharge, and this intermittent voltage application is continued to maintain the planar discharge.
(効果)
陰極となるホローカソード型電極(5)は、帯状体を長
手方向に屈曲或は湾曲して形成され、電極の長手方向と
直交する断面形状はとの部位でも同形状であるから、該
電極(5)の長手方向に於て電子の放出量は均一化され
、更に、ホローカソード型電極の表面積は大きいため、
電子放出量が多い。従って平面状の均一で発光効率の高
い放電が望める。(Effect) The hollow cathode type electrode (5) serving as the cathode is formed by bending or curving a strip in the longitudinal direction, and the cross-sectional shape perpendicular to the longitudinal direction of the electrode is the same at both locations. The amount of electron emission is made uniform in the longitudinal direction of the electrode (5), and furthermore, since the surface area of the hollow cathode type electrode is large,
Large amount of electron emission. Therefore, a planar, uniform discharge with high luminous efficiency can be expected.
(効果)
陽極となる電極は、平板状或は棒状に形成されているた
め、放電空間内での電極の取付はスペースは短縮され、
その分、陽極側の未発光部の幅を小さくできる。(Effects) Since the electrode that serves as the anode is formed into a flat plate or rod shape, the installation space for the electrode within the discharge space is shortened.
Correspondingly, the width of the non-emission part on the anode side can be made smaller.
(実施例)
平面型蛍光灯は、互いに内面に蛍光体(21)(31)
を塗布した前面ガラス板(2)と背面ガラス板(3)と
をスペーサとなるガラス製枠体(4)を挟んでフリット
ガラス等にて気密に接合し、矩形の扁平容器(1)を形
成する。(Example) Flat fluorescent lamps each have phosphors (21) (31) on their inner surfaces.
The front glass plate (2) and the back glass plate (3) coated with the above are airtightly joined with frit glass or the like with a glass frame (4) serving as a spacer in between to form a rectangular flat container (1). do.
枠体(4)の一部に突設した排気管(7)を通じて容器
内を真空排気及びアルゴンガスと水銀蒸気を封入を行な
う。The inside of the container is evacuated and filled with argon gas and mercury vapor through an exhaust pipe (7) protruding from a part of the frame (4).
容器内の放電空間の両側に一対の電極(5)(6)を平
行に対向配備し、各電極に接続したリード片(51)(
61)は容器を側壁を気密に貫通して外部に臨出させる
。A pair of electrodes (5) and (6) are arranged facing each other in parallel on both sides of the discharge space in the container, and a lead piece (51) (
61) allows the container to pass through the side wall in an airtight manner and exit to the outside.
電極(5)(6)は、例えば鉄−ニッケル合金にて形成
され、一方の電極(6)は平板状に形成され、前面ガラ
ス板(2)と直交する面内に配置されている。The electrodes (5) and (6) are made of, for example, an iron-nickel alloy, and one electrode (6) is formed into a flat plate shape and arranged in a plane perpendicular to the front glass plate (2).
他方の電極(5)は、広幅の帯状体の長手方向の上下縁
を同じ方向に直角に屈曲して、断面コ字状の表面積の大
きな所謂ホローカソード型電極に形成され、開口を相手
電極(6)に向けている。The other electrode (5) is formed by bending the upper and lower longitudinal edges of a wide strip at right angles in the same direction to form a so-called hollow cathode electrode with a large surface area and a U-shaped cross section, with the opening facing the opposite electrode ( 6).
前記リード片(51)(61)に、ホローカソード型電
極(5)が陰極、平板状電極(6)か陽極となる様に駆
動回路(8)を接続する。該駆動回路(8)は、ホロー
カソード型電極(5)に負のパルス電圧、帯状電極(6
)に零電圧を印加し、或はホローカソード型電極(5)
に零電位を印加し、帯状電極(6)に正のパルス電圧を
印加できるものであれば構成を問わない。A drive circuit (8) is connected to the lead pieces (51) and (61) so that the hollow cathode electrode (5) serves as a cathode and the flat electrode (6) serves as an anode. The drive circuit (8) applies a negative pulse voltage to the hollow cathode electrode (5) and a strip electrode (6).
), or apply a zero voltage to the hollow cathode electrode (5).
Any configuration may be used as long as a zero potential can be applied to the strip electrode (6) and a positive pulse voltage can be applied to the strip electrode (6).
平面状放電の持続時間は、およそ50μsec以下であ
るから、平面状放電が崩れてアーク状の集中状態に入る
以前に放電を停止し、数10μsec〜数100μse
c後、再びパルスを印加し、平面状放電を発生させ、こ
の断続状の電圧口]加を続けて平面状放電を維持する。Since the duration of a planar discharge is approximately 50 μsec or less, the discharge is stopped before the planar discharge collapses and enters an arc-like concentrated state, and the duration is several tens of μsec to several 100 μsec.
After c, a pulse is applied again to generate a planar discharge, and this intermittent voltage application is continued to maintain the planar discharge.
印加電圧は、500〜100OV 、パルス幅は上記理
由により、およそ50μSeC以下が望ましい。The applied voltage is preferably 500 to 100 OV, and the pulse width is preferably approximately 50 μSeC or less for the reasons mentioned above.
陰極となるホローカソード型電極(5)は、帯状体を長
手方向に屈曲或は湾曲して形成され、電極の長手方向と
直交する断面形状はどの部位でも同形状であるから、該
電極(5)の長手方向に於て電子の放出量は均一化され
、更に、ホローカソード型電極の表面積は大きいため、
電子放出量が多い。従って平面状の均一で発光効率の高
い放電が望める。The hollow cathode electrode (5), which serves as a cathode, is formed by bending or curving a strip in the longitudinal direction, and the cross-sectional shape perpendicular to the longitudinal direction of the electrode is the same at any location. ) The amount of electron emission is made uniform in the longitudinal direction, and furthermore, since the surface area of the hollow cathode type electrode is large,
Large amount of electron emission. Therefore, a planar, uniform discharge with high luminous efficiency can be expected.
上記の如く、陽極となる電極(6)は板状に形成し、容
器の側面に接近して配備したため、陽極側の未発光部の
幅w3は、陰極側の未発光部の幅W2より縮小され、そ
の分、平面型蛍光灯の電極間方向の長さを小さくできる
。As mentioned above, since the electrode (6) serving as the anode is formed into a plate shape and placed close to the side surface of the container, the width w3 of the non-emission part on the anode side is smaller than the width W2 of the non-emission part on the cathode side. Therefore, the length of the flat fluorescent lamp in the inter-electrode direction can be reduced accordingly.
第3図は電極の他の実施例を示し、陰極となる電極(5
0)は、広幅の帯状板の中央部を屈曲して断面V字状の
ホローカソード型に形成され、陽極となる電極(60)
は棒状に形成下ものである。FIG. 3 shows another embodiment of the electrode, in which the electrode (5
0) is an electrode (60) that is formed into a hollow cathode type with a V-shaped cross section by bending the center part of a wide strip plate, and serves as an anode.
is formed into a rod shape.
この場合も前記と同様の効果を奏する。In this case as well, the same effect as described above is achieved.
尚、陰極となる電極の形状は、上記の断面コ字状、断面
V字状に限らず、断面U字状、断面り字状等、長手方向
に一様の断面形状を呈するものであれば種々の形状で実
施できることは勿論である。The shape of the electrode serving as the cathode is not limited to the above-mentioned U-shaped cross section or V-shaped cross section, but may be any shape that is uniform in the longitudinal direction, such as a U-shaped cross section or an L-shaped cross section. Of course, it can be implemented in various shapes.
更に、背面ガラス板(3)の内面に電極(5)と直交し
、前面ガラス板(2)に達する複数の凸条(図示せず)
を形成して、大気圧によるガラス板の爆縮を機械的に防
止できる等、本発明は上記実施例の構成に限定されるこ
とはなく、特許請求の範囲に記載の範囲で種々の変形か
可能である。Furthermore, a plurality of protrusions (not shown) are provided on the inner surface of the rear glass plate (3), perpendicular to the electrode (5) and reaching the front glass plate (2).
The present invention is not limited to the structure of the above embodiment, and can be modified in various ways within the scope of the claims. It is possible.
第1図は平面型蛍光灯の分解斜面図、第2図は平面型蛍
光灯の断面図、第3図は他の実施例の断面図、第4図は
従来例の平面型蛍光灯の一部を破断した斜面図である。
(2)・・・前面ガラス板 (3)・・・背面ガラス板
(5)・・・ホローカッ−F型電極Figure 1 is an exploded perspective view of a flat fluorescent lamp, Figure 2 is a sectional view of a flat fluorescent lamp, Figure 3 is a sectional view of another embodiment, and Figure 4 is a diagram of a conventional flat fluorescent lamp. FIG. (2)...Front glass plate (3)...Back glass plate (5)...Hollow cup-F type electrode
Claims (1)
空間を形成し、該放電空間に一対の電極を平行に配備し
た平面型蛍光灯に於て、一方の電極(6)は平板状に形
成されてガラス板(2)と直交する面内に配置し、他方
の電極(5)は帯状体を長手方向に沿って屈曲或は湾曲
して前記帯状電極(6)よりも表面積が大きなホローカ
ソード型電極となし、該ホローカソード型電極(5)を
陰極、他方の平板状電極(6)を陽極としている平面型
蛍光灯。 [2]前面ガラス板と背面ガラス板との間に扁平な放電
空間を形成し、該放電空間に一対の電極を平行に配備し
た平面型蛍光灯に於て、一方の電極(60)は棒体に形
成され、他方の電極(50)は帯状体を長手方向沿って
屈曲或は湾曲してホローカソード型電極となし、該ホロ
ーカソード型電極(50)を陰極、他方の棒状電極(6
0)を陽極としている平面型蛍光灯。[Scope of Claims] [1] In a flat fluorescent lamp in which a flat discharge space is formed between a front glass plate and a rear glass plate, and a pair of electrodes are arranged in parallel in the discharge space, one The electrode (6) is formed into a flat plate and is arranged in a plane perpendicular to the glass plate (2), and the other electrode (5) is formed by bending or curving a strip along the longitudinal direction. 6) A flat fluorescent lamp having a hollow cathode type electrode having a larger surface area than that of 6), using the hollow cathode type electrode (5) as a cathode and the other flat electrode (6) as an anode. [2] In a flat fluorescent lamp in which a flat discharge space is formed between a front glass plate and a rear glass plate, and a pair of electrodes are arranged in parallel in the discharge space, one electrode (60) is a rod. The other electrode (50) is formed into a hollow cathode type electrode by bending or curving the strip body along the longitudinal direction, and the hollow cathode type electrode (50) is used as a cathode and the other rod-shaped electrode (6
A flat fluorescent lamp with 0) as the anode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20558390A JPH0495337A (en) | 1990-08-01 | 1990-08-01 | Flat fluorescent lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20558390A JPH0495337A (en) | 1990-08-01 | 1990-08-01 | Flat fluorescent lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0495337A true JPH0495337A (en) | 1992-03-27 |
Family
ID=16509284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20558390A Pending JPH0495337A (en) | 1990-08-01 | 1990-08-01 | Flat fluorescent lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0495337A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5343116A (en) * | 1992-12-14 | 1994-08-30 | Winsor Mark D | Planar fluorescent lamp having a serpentine chamber and sidewall electrodes |
US5479069A (en) * | 1994-02-18 | 1995-12-26 | Winsor Corporation | Planar fluorescent lamp with metal body and serpentine channel |
US5903096A (en) * | 1997-09-30 | 1999-05-11 | Winsor Corporation | Photoluminescent lamp with angled pins on internal channel walls |
US5914560A (en) * | 1997-09-30 | 1999-06-22 | Winsor Corporation | Wide illumination range photoluminescent lamp |
US6075320A (en) * | 1998-02-02 | 2000-06-13 | Winsor Corporation | Wide illumination range fluorescent lamp |
US6091192A (en) * | 1998-02-02 | 2000-07-18 | Winsor Corporation | Stress-relieved electroluminescent panel |
US6100635A (en) * | 1998-02-02 | 2000-08-08 | Winsor Corporation | Small, high efficiency planar fluorescent lamp |
US6114809A (en) * | 1998-02-02 | 2000-09-05 | Winsor Corporation | Planar fluorescent lamp with starter and heater circuit |
US6127780A (en) * | 1998-02-02 | 2000-10-03 | Winsor Corporation | Wide illumination range photoluminescent lamp |
JP2002117808A (en) * | 2000-10-06 | 2002-04-19 | Nec Corp | Flat-face type fluorescent lamp, its fixing structure, and liquid crystal display device |
US6762556B2 (en) | 2001-02-27 | 2004-07-13 | Winsor Corporation | Open chamber photoluminescent lamp |
-
1990
- 1990-08-01 JP JP20558390A patent/JPH0495337A/en active Pending
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5343116A (en) * | 1992-12-14 | 1994-08-30 | Winsor Mark D | Planar fluorescent lamp having a serpentine chamber and sidewall electrodes |
US5463274A (en) * | 1992-12-14 | 1995-10-31 | Winsor Corporation | Planar fluorescent lamp having a serpentine chamber and sidewall electrodes |
US5479069A (en) * | 1994-02-18 | 1995-12-26 | Winsor Corporation | Planar fluorescent lamp with metal body and serpentine channel |
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US6100635A (en) * | 1998-02-02 | 2000-08-08 | Winsor Corporation | Small, high efficiency planar fluorescent lamp |
US6114809A (en) * | 1998-02-02 | 2000-09-05 | Winsor Corporation | Planar fluorescent lamp with starter and heater circuit |
US6127780A (en) * | 1998-02-02 | 2000-10-03 | Winsor Corporation | Wide illumination range photoluminescent lamp |
JP2002117808A (en) * | 2000-10-06 | 2002-04-19 | Nec Corp | Flat-face type fluorescent lamp, its fixing structure, and liquid crystal display device |
JP4493064B2 (en) * | 2000-10-06 | 2010-06-30 | 日本電気株式会社 | Flat fluorescent lamp fixing structure and liquid crystal display device |
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