JPS6091546A - Fluorescent lamp for display element - Google Patents

Abstract

PURPOSE:To obtain a fluorescent lamp with high brightness whose luminous tube is easy to damage by coating, with phosphor, a section that is excluded from the preset range of the outside curved surface of a U-shaped curved section and forming an aperture section on the outside curved/surface of this curved section. CONSTITUTION:The inner surface of a luminous tube 3 is coated with a phosphor film 8 except for the preset range of the outside curved surface 6 of a curved section 5. For this reason, a transparent aperture section 9 to which the fluorescent film 8 that is opened in a slit shape toward the display direction is not applied is formed on the outside curved surface 6 of the curved section 5. The opening range of the aperture section 9 covers the whole bent circular portion of the curved section 5 and said opening range in the circumferential direction of the tube section is set to the range opened by an equal angle theta on both sides from and axis X1-X1 of the luminous tube 3. Since the phosphor film 8 is prevented from biting the inner surface of the luminous tube 3 even if the outside curved surface 6 is greatly stretched when the bulb is curved, the strength of the curved section 5 can be prevented from being decreased.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明はカラー映像表示装置等の光源として用いられる
けい光ランプに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a fluorescent lamp used as a light source for color image display devices and the like.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

野球場や競技場等のスコアが一ドに組み込まれた大型の
表示装置は、スクリーンが一ド上に数千ないし数万個の
表示素子を密に並設し、これら表示素子を画像信号に応
じて適宜点灯させることによシ、スクリーンデート上に
テレビカメラやＶＴＲに収録された映像を写し出すよう
になっている。Large display devices that incorporate scores at baseball stadiums, stadiums, etc. have thousands or tens of thousands of display elements arranged closely on one screen, and convert these display elements into image signals. By turning on the lights accordingly, the images recorded on the TV camera or VTR are projected on the screen date.

この種装置の表示素子としては、現在界、緑。Currently, the display element for this type of device is green.

青の単色を発する例えばＣＲＴを組み合わせたものと、
同じく赤、緑、青の透光性塗料を塗布したカラー電球を
組み合わせたものが知られている。ところが、ＣＲＴは
消費電力が少なく発光効率も比較的高い等の利点を有す
るものの、その輝度が低いために昼間のように周囲が明
るいと映像が不鮮明なものとなシ、さらにＣＲＴ自体が
高価であるためコスト高となる難点がある。一方カラー
電球は、輝度は高いが反面消費電力が多い上に残像時間
が長く、動きの早い映像には追随が不十分で映像が不鮮
明となシ、かつ寿命も短い等の欠点がある。For example, a combination of CRTs that emit a single color of blue,
A combination of color light bulbs coated with red, green, and blue translucent paint is also known. However, although CRTs have advantages such as low power consumption and relatively high luminous efficiency, their low brightness makes images unclear in bright surroundings such as during the day, and CRTs themselves are expensive. Therefore, there is a drawback that the cost is high. On the other hand, color light bulbs have high brightness, but have disadvantages such as high power consumption, long afterimage time, insufficient tracking of fast-moving images, resulting in unclear images, and short lifespan.

そこで、他の表示素子としてけい光ランプの使用が考え
られる。けい光ランプは消費電力も少なく長寿命で、し
かも高輝度でコストも比較的安価であることは周知の通
りであり、この点から見れば表示素子として好適するも
のであると言える。そしてこの場合、鮮明で良質な映像
を得るためには、上記けい光ランプも従来のＣＲＴやカ
ラー電球と同様にスクリーンが−ド上に密に並設する必
要があね、このため最近では、コンパクト化を図るため
にけい光ランプをＵ字状に折り曲げ、そのＵ字形の曲成
部を発光部として利用する試みがなされている。Therefore, it is possible to use a fluorescent lamp as another display element. It is well known that fluorescent lamps consume less power, have a long life, have high brightness, and are relatively inexpensive, and from this point of view, they can be said to be suitable as display elements. In this case, in order to obtain clear, high-quality images, the fluorescent lamps mentioned above must be placed close together on the screen, just like conventional CRTs and color light bulbs. In order to make the lamp more compact, attempts have been made to bend the fluorescent lamp into a U-shape and use the U-shaped bent part as a light emitting part.

しかしながらとのけい光ランプは、コンパクト化の都合
上曲成部の曲率が特に小さいため、ランプ製造に当って
一般照明用のランプの場合と同様に、直管状の発光管の
内面にけい光体を塗布した後、この発光管の途中を加熱
してＵ字状に折り曲げると、その曲げ外側の伸び率が曲
げ内側に比べて著しく大きくなってしまう。したがって
、この曲げ外側の面のけい光体が曲成部の管壁に喰い込
み、との曲成部の強度を低下させるため、衝撃や荷重が
加わった場合に曲成部が破損し易くなる不具合がある。However, the curvature of the curved part of the fluorescent lamp is particularly small for the sake of compactness, so when manufacturing the lamp, a fluorescent material is placed on the inner surface of the straight arc tube, as in the case of lamps for general lighting. When the arc tube is heated in the middle after being applied and bent into a U-shape, the elongation rate on the outside of the bend becomes significantly larger than that on the inside of the bend. Therefore, the phosphor on the outside surface of the bend digs into the pipe wall of the bent part, reducing the strength of the bent part, making the bent part more likely to be damaged when an impact or load is applied. There is a problem.

なお、この対策として発光管をＵ字状に折多曲げた後、
この発光管の内面にけい光体を塗布することも考えられ
るが、このようにすると作業性がきわめて悪く量産に不
向きとなる等の問題があシ、有効な解決策とはなυ得な
かった。As a countermeasure for this, after bending the arc tube into a U-shape,
It may be possible to coat the inner surface of the arc tube with a phosphor, but this method would have problems such as extremely poor workability and would be unsuitable for mass production, so it was not an effective solution. .

〔発明の目的〕[Purpose of the invention]

本発明はこのような事情にもとづいてなされたもので、
発光管が破損し難くなυ、高輝度な表示素子用けい光ラ
ンプの提供を目的とする。The present invention was made based on these circumstances, and
The purpose of the present invention is to provide a fluorescent lamp for a display element whose arc tube is not easily damaged and whose luminance is high.

〔発明の概要〕[Summary of the invention]

すなわち、本発明は上記目的を達成するため、発光管の
内面にけい光体を被着するに当って、このけい光体はＵ
字状をなした曲成部の曲げ外側の面の一定範囲を除いた
部分に被着し、との曲成部の曲げ外側の面にアパ−チャ
一部を形成したことを特徴とする。That is, in order to achieve the above object, the present invention covers a phosphor on the inner surface of an arc tube, and this phosphor has a U.
It is characterized in that it is applied to a portion of the outside surface of the curved portion in the shape of a letter except for a certain range, and a part of the aperture is formed on the outside surface of the curved portion.

〔発明の実施例〕[Embodiments of the invention]

以下本発明の第１実施例を、第１図ないし第４図にもと
づいて説明する。A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

第１図は例えば野球場や競技場のスコアが一ド等に組み
込まれる大型の表示スクリーンの概略を示し、略矩形状
をなしたスクリーンが一ド１には、数千ないし数万個の
表示素子２・・・が密に並置されている。これら表示素
子２・・・はＵ字形に曲成された曲管形けい光ランプで
あシ、とのけい光ランプの詳細については第２図以降に
示されている。す々わち、３は発光管であり、本実施例
の発光管３は管内径１０　ｔｔｍ　ｒ管長１００■、肉
厚１゜θ１１１Ｉである軟質ガラス製の直管形ノ々ルブ
を、その両端部４，４間の中央部で略Ｕ字状に屈曲し、
これら両端部４，４間にＵ字形の曲成部５を形成したも
のでおる。そしてこの発光管３は曲成部５を発光部とし
て、その曲げ外側の面６を表示方向に向けた姿勢で上記
スクリーンが一ド１上に並置されている。このような発
光管３０両端部４，４には、夫々電子放射性５− 物質が塗布された電極フィラメント７．７が封着されて
いるとともに、発光管３内には所定量の水銀と始動用の
希ガスが封入されている。また発光管３の内面には、上
記曲成部５の曲げ外側の面６の一定範囲を除いて、赤、
緑、青のいずれかの単色光を発するけい光体被膜８が被
着されておシ、このため曲成部５の曲げ外側の面６には
、表示方向に向りてスリット状に開口する上記けい光体
被膜８が被着されていない透明なアパーチャ一部９が形
成されている。すなわちこのアノ４−チャ一部９は、曲
成前の直管形バルブの内面にけい光体懸濁液を塗布乾燥
せしめてけい光体被膜８を被着した後、このバルブ内に
綿棒等を挿入してバルブ中央部のけい光体被膜８を管軸
方向に沿って所定の巾で除去し、次に直管形バルブの中
央部を加熱し、上記けい光体被膜８が除去された部分を
曲げ外側として略Ｕ字状に曲成することにより形成した
もので、このアｉＪ？−チャ一部９の開口範囲は曲成部
５の曲げ方向全周に亘っているとともに、周方向へ６− の開口巾１１は第３図に示したように発光管３の軸線Ｘ
１−Ｘ、を中心としてその両側に等角度θ分開いた範囲
内に設定されている。Figure 1 shows an outline of a large display screen that is used to display the scores of a baseball field or stadium, for example, on a single screen. Elements 2... are closely arranged in parallel. These display elements 2 are U-shaped curved tube-shaped fluorescent lamps, and the details of the fluorescent lamps are shown in FIG. 2 and subsequent figures. In other words, 3 is an arc tube, and the arc tube 3 of this embodiment is a straight tube-shaped knob made of soft glass with an inner diameter of 10 ttm r, a tube length of 100 mm, and a wall thickness of 1° θ111I. Bent in a substantially U-shape at the center between parts 4, 4,
A U-shaped bent portion 5 is formed between these end portions 4, 4. The arc tube 3 has a bent portion 5 as a light emitting portion, and the screen is juxtaposed on the door 1 with the curved outer surface 6 facing the display direction. Electrode filaments 7, 7 coated with an electron-radiating substance are sealed to both ends 4, 4 of the arc tube 30, and a predetermined amount of mercury and a starting material are contained within the arc tube 3. of rare gas is sealed. In addition, the inner surface of the arc tube 3 is red, except for a certain range of the curved outer surface 6 of the curved portion 5.
A phosphor coating 8 that emits monochromatic light of either green or blue is adhered to the surface 6 of the curved portion 5 on the outside of the bend. A transparent aperture portion 9 is formed to which the phosphor coating 8 is not applied. That is, this anno 4-cha part 9 is made by applying a phosphor suspension to the inner surface of the straight tube-shaped bulb before bending, allowing it to dry, and applying a phosphor coating 8, and then inserting a cotton swab or the like into the bulb. was inserted and the phosphor coating 8 at the center of the bulb was removed by a predetermined width along the tube axis direction, and then the center of the straight tube type bulb was heated to remove the phosphor coating 8. It is formed by bending the outer part into a roughly U-shape. The opening range of the cha part 9 extends over the entire circumference of the curved part 5 in the bending direction, and the opening width 11 in the circumferential direction is aligned with the axis X of the arc tube 3 as shown in FIG.
1-X, and is set within a range separated by an equal angle θ on both sides thereof.

なお、スクリーンが−ド１上の各けい光ランプは点灯装
置を介して電源に接続され、この点灯装置を画像制御部
で制御することにより、けい光ランプが適宜点灯すると
ともに、投入電力が調整されて任意の混合色が得られ、
種々の映像がスクリーンが一ド１上に写し出されるよう
になっている。Each of the fluorescent lamps on the screen card 1 is connected to a power source via a lighting device, and by controlling this lighting device with the image control unit, the fluorescent lamps are lit as appropriate and the input power is adjusted. any mixed color can be obtained,
Various images are projected onto the screen one screen at a time.

このような構成のけい光ランプによれば、曲成部５の曲
げ外側の面６にア・ぐ−チャ一部９を形成したので、・
々ルブの曲成時にこの曲げ外側の面６が大きく伸張され
てもけい光体被膜８の剥離やひび割れによる外観上の見
苦しさはなくなる。またけい光体被膜８が発光管３内面
にくい込むこともなく々るから、曲成部５の強度低下を
防止でき、このため耐衝撃性が向上し、破損し難くなる
。According to the fluorescent lamp having such a configuration, since the armature portion 9 is formed on the curved outer surface 6 of the curved portion 5,
Even if the curved outer surface 6 is greatly stretched during bending of the tube, the unsightly appearance due to peeling or cracking of the phosphor coating 8 is eliminated. In addition, since the phosphor coating 8 does not sink into the inner surface of the arc tube 3, deterioration in the strength of the curved portion 5 can be prevented, thereby improving impact resistance and making it less likely to be damaged.

このよう々効果は本発明者らの行った実験によっても確
認されておシ、以下この実験結果について述べる二す力
わち、アパーチャ一部９の開口巾７１＋換言すれば発光
管３の軸線ｘｉ−ｘ。This effect has been confirmed by experiments conducted by the present inventors, and the following describes the results of these experiments.The two forces are the opening width 71 of the aperture portion 9 + the axis xi of the arc tube 3. -x.

からの開き角度θを夫々１０°、１５°、２５°、４０
’。The opening angle θ from 10°, 15°, 25°, 40°
'.

５５°、７０°、８０°および９０°とした出力６Ｗ級
のＵ字形けい光ランプを各２０本づつ製作し、けい光ラ
ンプの組立時における発光管３の破損およびけい光体被
膜８の剥離発生率を調べたところ、第４図中破線で示し
たような結果を得た。We manufactured 20 U-shaped fluorescent lamps each with an output of 6W at angles of 55°, 70°, 80°, and 90°, and detected damage to the arc tube 3 and peeling of the phosphor coating 8 during assembly of the fluorescent lamps. When the incidence rate was investigated, the results shown by the broken line in Figure 4 were obtained.

との第４図からも明らかなように、開き角度θを１５°
以上としたけい光ランプにおいては、上記ランプ破損等
の発生率はせいぜい１０チ程度にしかすぎず、特に開き
角度θを２５°以上とした場合には発生率は皆無であっ
た。As is clear from Figure 4, the opening angle θ is 15°.
In the above-mentioned fluorescent lamp, the incidence of lamp breakage was only about 10 times at most, and especially when the opening angle θ was set to 25° or more, there was no incidence at all.

また、上述のように曲成部５の曲げ外側の面６にアパー
チャ一部９を形成したけい光ランプにおいて、その発光
部となる曲成部５の輝度を測定したところ、上記第４図
中実線で示したような結果を得た。この実験では曲成部
５の内面全面にけい光体被膜８を被着した従来構成のラ
ンプの輝度を１００（％）としたときの相対値で評価し
ておシ、上記第４図からも明らかなように、アパーチャ
一部９の開口巾を示す角度θを１５°ないし８０°とし
たけい光ランプでは輝度の向上が認められ、特に角度θ
を２５°ないし７０°に設定した場合には１０％以上も
高輝度であった。逆に上記角度θを１０°としたけい光
ランプでは、バルブ破損やけい光体被膜８の剥離発生率
が高いばかシでなく輝度の点においても従来構成のラン
プと大差なく、また角度θを９０°としたけい光ランプ
にあっては上記発生率は皆無であるものの、輝度の低下
が著しいことが分る。In addition, in the fluorescent lamp in which the aperture portion 9 is formed on the curved outer surface 6 of the curved portion 5 as described above, the brightness of the curved portion 5 which is the light emitting portion was measured. The results shown by the solid line were obtained. In this experiment, the luminance of a conventional lamp with a phosphor coating 8 coated on the entire inner surface of the curved portion 5 was evaluated as a relative value, with the luminance taken as 100 (%). As is clear, in the fluorescent lamps in which the angle θ indicating the opening width of the aperture part 9 was set from 15° to 80°, the brightness was improved, especially when the angle θ
When the angle was set between 25° and 70°, the brightness was 10% higher. On the other hand, a fluorescent lamp with the above-mentioned angle θ of 10° does not have a high incidence of bulb damage or peeling of the phosphor coating 8, and is not much different from the conventional lamp in terms of brightness. In the case of a fluorescent lamp set at 90°, although the above-mentioned incidence does not occur at all, it can be seen that the brightness decreases significantly.

したがって、以上のことから曲成部５にア・ぐ−チャ一
部９を形成しても、その開口巾ｊｌｌを適宜設定すれば
、輝度に悪影響を及ぼすどころか、輝度をよシ向上させ
得ることが可能となる。Therefore, from the above, even if the aperture part 9 is formed in the curved part 5, if the aperture width jll is set appropriately, the brightness will not be adversely affected, but the brightness can be greatly improved. becomes possible.

なお、本発明は上述した第１実施例に制約されるもので
はなく、第５図ないし第７図に示す第２実施例のように
、曲成部５の曲げ内側の面。Note that the present invention is not limited to the first embodiment described above, but as in the second embodiment shown in FIGS. 5 to 7, the curved inner surface of the curved portion 5.

９一 つまシアパーチャ一部９と対向する面１１に、その管壁
とけい光体被膜８との間に位置して光反射膜１２を被着
しても良い。この光反射膜１２は、曲成前の直管形バル
ブの内面に例えば結着材と溶材が添加されたアンチモン
とアルミ体懸濁液を塗布してけい光体被膜８を被着した
後、バルブ中央部において上記光反射膜１２と対向され
る部分のけい光体被膜８を除去し、次にバルブ中央部を
加熱してけい光体被膜８を除去した部分を曲げ外側とし
て略Ｕ字状に屈曲するととで、曲成部５の曲げ外側にア
ミ４−チャ一部９が位置し、また曲げ内側に光反射膜１
２が位置するけい光ランプが完成される。そしてこの場
合、アパーチャ一部９の開口巾１１を示す角度θを夫々
２５°、５０°および７５°とし、かつ光反射膜１２の
被着中Ｌ１を上記アパーチャ一部９の開口巾の１／４　
、１／３　、１／２　、１／１および１．２倍とした出
力６Ｗ級のＵ字形けい光ランプ１０− を各１０本づつ製作し、夫々の曲成部５の輝度を測定し
てその平均値をめたところ、第７図に示すような結果を
得だ。この実験では上記第１実施例と同様に、従来構成
のけい光ランプの輝度をＺｏｏ（％）としたときの相対
値で評価しておシ、この第７図からも明らかなように光
反射膜１２の巾り、を１／３以上としたけい光ランプに
おいては、従来構成のけい光ランプに比べて著しく高輝
度であるとともに、上記第１実施例のアパーチャ一部９
のみの場合よりも最高で１４チも高輝度となる良好な結
果が得られた。A light reflecting film 12 may be coated on the surface 11 facing the shear aperture portion 9, located between the tube wall and the phosphor coating 8. This light reflecting film 12 is formed by applying a suspension of antimony and aluminum to which a binder and a solvent are added, for example, to the inner surface of a straight tube bulb before bending, and then coating the phosphor film 8. At the center of the bulb, the portion of the phosphor coating 8 that faces the light reflecting film 12 is removed, and then the center of the bulb is heated, and the portion from which the phosphor coating 8 is removed is bent to form an approximately U-shape on the outside. When the curved portion 5 is bent, a part 9 of the amino 4-cha is located on the outside of the bend, and a light reflecting film 1 is located on the inside of the bend.
2 is located, the fluorescent lamp is completed. In this case, the angle θ indicating the opening width 11 of the aperture part 9 is set to 25°, 50° and 75°, respectively, and L1 during the deposition of the light reflecting film 12 is 1/1/2 of the opening width of the aperture part 9. 4
, 1/3, 1/2, 1/1, and 1.2 times the output of 6W class U-shaped fluorescent lamps 10- were manufactured, and the brightness of the curved portion 5 of each was measured. When we calculated the average value, we obtained the results shown in Figure 7. In this experiment, as in the first embodiment, the luminance of the fluorescent lamp with the conventional configuration was evaluated using a relative value as Zoo (%), and as is clear from Fig. 7, the light reflection A fluorescent lamp in which the width of the film 12 is 1/3 or more has significantly higher brightness than a fluorescent lamp with a conventional structure, and also has a part 9 of the aperture in the first embodiment.
A good result was obtained in which the brightness was up to 14 times higher than in the case where only the light was used.

なお、このような結果はランプ出力や発光管３、けい光
体被膜８および光反射膜１２の材質を変えた場合も大差
たく、またアパーチャ一部９の開口位置ならびに光反射
膜１２の被着位置を曲成部５から両端部４，４側に延長
した場合でも同様であった。Note that such results do not differ much even when the lamp output and the materials of the arc tube 3, the phosphor coating 8, and the light reflection film 12 are changed, and the opening position of the aperture part 9 and the coating of the light reflection film 12 also change. The same thing happened even when the position was extended from the curved portion 5 to the both end portions 4, 4 side.

さらに上記光反射膜１２の代シに第８図ないし第９図に
示す本発明の第３実施例のように、曲成部５の曲げ内側
の外壁面にアパーチャ一部９と対向して例えばアルミ製
の反射板２１を被着しても良い。そしてこの場合におい
ても、アパーチャ一部９の開口巾ｌｌを示す角度θを２
５°、５０°、７５°とし、かつ反射板２１の巾Ｌ２を
上記アパーチャ一部９の開口巾ｌｌの１／４゜１／３　
、１／２　、１／１および１．２倍とした出力６Ｗ級の
Ｕ字形けい光ランプを各５本づつ製作し、夫々の曲成部
５の輝度を測定してその平均値をめ、上述した第２実施
例の場合と同様に評価したところ、第９図に示すような
結果を得た。Furthermore, in place of the light reflecting film 12, as in the third embodiment of the present invention shown in FIGS. A reflective plate 21 made of aluminum may be attached. Also in this case, the angle θ indicating the opening width ll of the aperture part 9 is set to 2.
5°, 50°, and 75°, and the width L2 of the reflecting plate 21 is 1/4° and 1/3 of the opening width ll of the aperture part 9.
, 1/2, 1/1, and 1.2 times the output of 6W class U-shaped fluorescent lamps were manufactured, and the brightness of each curved part 5 was measured and the average value was calculated. When evaluated in the same manner as in the case of the second embodiment described above, the results shown in FIG. 9 were obtained.

この第９図から明らかなように反射板２１の巾り、を１
／３以上としたけい光ランプにおいては、従来構成のけ
い光ランプに比べて著しく高輝度であるとともに、上記
第１実施例で示したアパーチャ一部９のみの場合に比し
て最高で１０チも高輝度となる良好な結果が得られた。As is clear from FIG. 9, the width of the reflector 21 is 1
/3 or higher, the luminance is significantly higher than that of a fluorescent lamp with a conventional configuration, and the luminance is at most 10 in comparison with the case of only the aperture part 9 shown in the first embodiment. Good results were obtained with high brightness.

なお、本発明に係るけい光ランプの曲げ形状はＵ字形に
特定されるものではなく、Ｕ字形の発光管をさらにＵ字
形に折り曲げたいわゆる鞍形状としても良い。The bent shape of the fluorescent lamp according to the present invention is not limited to the U-shape, but may be a so-called saddle shape in which a U-shaped arc tube is further bent into a U-shape.

〔発明の効果〕〔Effect of the invention〕

以上詳述した本発明によれば、発光部としての曲成部の
曲げ外側の面にアパーチャ一部を形成したので、発光管
の曲成時に曲げ外側の面が大きく伸張されても、けい光
体が発光管の管壁にくい込む虞れもなくなシ、このため
曲成部の強度低下を防止でき、耐衝撃性に優れ、破損し
難くなる利点がある。According to the present invention described in detail above, since a part of the aperture is formed on the curved outer surface of the curved section serving as the light emitting section, even if the curved outer surface is greatly stretched during bending of the arc tube, the fluorescent light will not be emitted. There is no risk of the body getting wedged into the tube wall of the arc tube, and therefore the strength of the curved portion can be prevented from decreasing, which has the advantage of being excellent in impact resistance and being less likely to break.

【図面の簡単な説明】[Brief explanation of drawings]

第１図ないし第４図は本発明の第１実施例を示し、第１
図は表示スクリーンの概略構成図、第２図はけい光ラン
グを一部断面で示す正面図、第３図は第２図中■−■線
に沿う断面図、第４図は特性図、第５図ないし第７図は
本発明の第２実施例を示し、第５図はけい光ランプを一
部断面した正面図、第６図は第５図中Ｖｌ−Ｍ線に沿う
断面図、第７図は特性図、第８図および第９図は本発明
の第３実施例を示し、第８図はけい光ランプの断面図、
第９図は特性図である。 ３・・・発光管、５・・・曲成部、６・・・曲げ外側の
面。 １３− ８・・・けい光体（けい光体被膜）、９・・・アパーチ
ャ一部。 出願人代理人　弁理士　鈴　江　武　彦１４− 藺Ｉ【郵嬉齢Ｆ　１ ）訃へト！＠ｕ齋　ド 第１頁の続き ０発　明　者　山　本　力　雄　横須賀南船；横須賀工
場１ 腹町１丁目２０１番地１　東京芝浦電気株式会社相1 to 4 show a first embodiment of the present invention.
The figure is a schematic configuration diagram of the display screen, Figure 2 is a front view showing a partial cross section of the fluorescent rung, Figure 3 is a sectional view taken along the line ■-■ in Figure 2, Figure 4 is a characteristic diagram, and Figure 4 is a characteristic diagram. 5 to 7 show a second embodiment of the present invention, in which FIG. 5 is a partially sectional front view of the fluorescent lamp, FIG. 6 is a sectional view taken along line Vl-M in FIG. 5, and FIG. 7 is a characteristic diagram, FIGS. 8 and 9 show a third embodiment of the present invention, and FIG. 8 is a sectional view of a fluorescent lamp.
FIG. 9 is a characteristic diagram. 3... Arc tube, 5... Bent portion, 6... Bent outer surface. 13- 8... phosphor (phosphor film), 9... part of aperture. Applicant's agent Patent attorney Takehiko Suzue 14- I [Yuukirei F 1] I'm sorry! @uSai Continued from page 1 0 Inventor: Rikio Yamamoto Yokosuka Minamisen; Yokosuka Factory 1 Haramachi 1-201-1 Minister of Tokyo Shibaura Electric Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] （１）略Ｕ字状の曲成部を有し内面にけい光体が被着さ
れた発光管を、その曲成部の曲げ外側の面を表示方向に
向けた姿勢で点灯させるけい光ランプであって、上記発
光管内面のけい光体は、その曲成部の曲げ外側の面の一
定範囲を除いた部分に被着し、との曲成部の曲げ外側の
面にアパーチャ一部を形成したことを特徴とする表示素
子用けい光ランプ。(1) A fluorescent lamp that lights an arc tube with a substantially U-shaped curved portion and a phosphor coated on its inner surface, with the bent outer surface of the curved portion facing the display direction. The phosphor on the inner surface of the arc tube is adhered to a portion of the curved portion except for a certain range of the outer surface of the curved portion, and a part of the aperture is formed on the curved outer surface of the curved portion. A fluorescent lamp for a display element, characterized in that: （２）上記発光管の曲成部に、アパーチャ一部と対向し
て光反射体を取着したことを特徴とする特許請求の範囲
第（１）項記載の表示素子用けい光ランプ。(2) A fluorescent lamp for a display device as set forth in claim (1), characterized in that a light reflector is attached to the curved portion of the arc tube so as to face a portion of the aperture.