JPH0336272B2 - - Google Patents
Info
- Publication number
- JPH0336272B2 JPH0336272B2 JP59120353A JP12035384A JPH0336272B2 JP H0336272 B2 JPH0336272 B2 JP H0336272B2 JP 59120353 A JP59120353 A JP 59120353A JP 12035384 A JP12035384 A JP 12035384A JP H0336272 B2 JPH0336272 B2 JP H0336272B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- glass bulb
- cold cathode
- cathode discharge
- discharge lamp
- 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
- 239000011521 glass Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004020 luminiscence type Methods 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 14
- 238000005286 illumination Methods 0.000 description 5
- -1 europium activated barium magnesium aluminate Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052771 Terbium Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002250 progressing effect Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 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
Landscapes
- Planar Illumination Modules (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は受光形表示デバイスのバツクライト用
の冷陰極放電灯に関し、特にカラー液晶表示パネ
ルのバツクライトに好適する低入力で高効率の冷
陰極放電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 cold cathode discharge lamp for the backlight of a light-receiving display device, and in particular to a low-input, high-efficiency cold cathode discharge lamp suitable for the backlight of a color liquid crystal display panel. It concerns electric lights.
一般に表示デバイスは装飾、広告媒体を始めと
して、いわゆるマンマシーンインターフエイス、
情報端末として、その重要性は日毎に増大してき
ている。この表示デバイスの中でも特に機能性に
富んだ電子表示デバイスの開発はめざましく、
種々のデバイスについて大面積化、大表示容量
化、多色・フルカラー化などの研究開発が進めら
れている。
Display devices are generally used for decoration, advertising media, so-called man-machine interfaces,
As an information terminal, its importance is increasing day by day. Among these display devices, the development of particularly highly functional electronic display devices is remarkable.
Research and development is progressing on various devices such as larger area, larger display capacity, multicolor/full color, etc.
電子表示デバイスとしては陰極線管（CRT）
が代表的であり、家庭用、工業用テレビジヨンを
始めとしてコンピユータ端末など各種用途に広く
用いられている。しかし乍ら、このCRTは表示
面積に比較して特に奥行きが深く、嵩ばる、重い
或いは目が疲れ易いといつた欠点を有し、扁平、
軽量化が進められていると共に、CRTに代る薄
形のデバイス、即ち電子式表示パネルの開発が活
発に進められている。 Cathode ray tube (CRT) as an electronic display device
is a typical example, and is widely used in various applications such as home and industrial televisions as well as computer terminals. However, this CRT has disadvantages such as being particularly deep compared to its display area, being bulky, heavy, and easily tiring to the eyes.
As weight reduction is progressing, development of thin devices to replace CRTs, that is, electronic display panels, is actively underway.
例えばプラズマデイスプレイパネル、蛍光表示
パネル、エレクトロミネセンスパネル、液晶表示
パネルがよく知られているが、中でも液晶表示パ
ネルは薄形、軽量で目が疲れないといつた特長に
加えて、低電圧駆動、低消費電力の特長を有して
いるために、実用化が進み、研究開発も活発であ
る。 For example, plasma display panels, fluorescent display panels, electroluminescent panels, and liquid crystal display panels are well known. Among them, liquid crystal display panels are thin, lightweight, and easy on the eyes, and are driven by low voltage. , has the feature of low power consumption, so it is being put into practical use and research and development is active.
この液晶表示パネルは自から発光しない、印刷
物と同様の受光形の表示デバイスであり、これが
目を疲れさせない原因と考えられるが、その反
面、照明光がなければ見ることができないという
不都合がある。従つて、液晶表示パネルを用いる
場合には常に照明体と対にしてまたは外光利用と
の兼用を考えなければならない。 This liquid crystal display panel is a light-receiving display device that does not emit light on its own, similar to printed matter, and this is thought to be the reason why it does not strain the eyes, but on the other hand, it has the disadvantage that it cannot be viewed without illumination light. Therefore, when using a liquid crystal display panel, it is always necessary to consider pairing it with an illumination body or using it in combination with external light.
従来、液晶表示パネル用の照明体としてはエレ
クトロミネセンス光源或いは蛍光灯が用いられて
いる。しかし乍ら、エレクトロミネセンス光源は
30ft−Ｌ程度の輝度しか得られず、表示パネルの
表示の明るさの点で不充分である。又、蛍光灯の
場合には輝度は2000ft−Ｌ程度と充分であるが、
発熱のために、表示パネルに密着しては使用でき
ず、そのために照明体まで含めると奥行きが深く
なり、表示パネルの薄形の特長が損なわれてしま
う。又、蛍光灯はバルブ端での輝度低下が著し
く、面積的にもスペースフアクタが悪い。さらに
は消費電力の70％近くが赤外線を含む熱として放
出され、その損失のかなりの部分が発光に寄与し
ないフイラメント電極及びその近傍で消費され
る。このフイラメント電極での消費電力は蛍光灯
のバルブ長には依存しないので、それが短かくな
ればなる程、輝度効率は低下する。即ち、同一輝
度を得るのに必要な電力が増大し、液晶表示パネ
ルが低消費電力であるという特長を損なう結果に
なつている。 Conventionally, electroluminescent light sources or fluorescent lamps have been used as illumination bodies for liquid crystal display panels. However, electroluminescent light sources
A brightness of only about 30 ft-L can be obtained, which is insufficient in terms of brightness of display on the display panel. In addition, in the case of fluorescent lights, the brightness is sufficient at around 2000 ft-L, but
Because of the heat generated, it cannot be used in close contact with the display panel, and for this reason, including the illumination body increases the depth, impairing the thin feature of the display panel. In addition, fluorescent lamps have a significant reduction in brightness at the end of the bulb and have a poor space factor in terms of area. Furthermore, nearly 70% of the power consumption is emitted as heat including infrared rays, and a considerable portion of the loss is consumed in the filament electrode and its vicinity, which do not contribute to light emission. The power consumption in this filament electrode does not depend on the bulb length of the fluorescent lamp, so the shorter it is, the lower the luminance efficiency is. That is, the power required to obtain the same brightness increases, resulting in a loss of the low power consumption feature of the liquid crystal display panel.
このような蛍光灯の発熱、スペースフアクタ、
消費電力といつた点での不都合を克服する光源と
して例えば昭和59年照明学会全国大会講演論文集
（第17頁）に開示されているような冷陰極放電灯
が一部で使用されている。
The heat generated by fluorescent lights, space factors,
As a light source that overcomes disadvantages in terms of power consumption, for example, cold cathode discharge lamps are used in some cases, as disclosed in the Proceedings of the National Conference of the Illuminating Engineering Society of Japan in 1981 (page 17).
この冷陰極放電灯は電極加熱を必要としないた
めに、電極での熱損失が少なく点灯回路を含めて
の低消費電力化ができるし、又、電極構造を単純
化できることから、外径の一層小さなガラスバル
ブの適用が可能となるために、バルブ端での輝度
低下が改善でき、軸方向の輝度分布もより均一化
できるものである。 Since this cold cathode discharge lamp does not require electrode heating, there is less heat loss in the electrodes, and power consumption including the lighting circuit can be reduced.Also, since the electrode structure can be simplified, the outer diameter can be further reduced. Since it becomes possible to use a small glass bulb, the reduction in brightness at the ends of the bulb can be improved, and the brightness distribution in the axial direction can also be made more uniform.
しかし乍ら、蛍光灯の場合、扁平な蛍光灯が面
光源として用いられるのに対して、冷陰極放電灯
は線光源であるために、表示パネルの表示面を均
一に高輝度で照明するためには複数本を平行に配
置して用いる必要がある。このために、消費電力
が冷陰極放電灯の本数に比例して増加し、この
点、蛍光灯を用いる場合と同様に液晶表示パネル
の低消費電力の特長を損なう結果となつている。 However, in the case of fluorescent lamps, flat fluorescent lamps are used as surface light sources, whereas cold cathode discharge lamps are linear light sources, so they cannot be used to uniformly illuminate the display surface of the display panel with high brightness. It is necessary to use multiple pieces arranged in parallel. For this reason, power consumption increases in proportion to the number of cold cathode discharge lamps, and in this respect, as in the case of using fluorescent lamps, the low power consumption feature of the liquid crystal display panel is lost.
それ故に、本発明の目的は簡単な構成によつて
熱損失を少なくでき、かつ軸方向の輝度分布を均
一化できるという効果を損なうことなく、低入力
（低消費電力）で高効率化できる冷陰極放電灯を
提供することにある。 Therefore, an object of the present invention is to reduce heat loss with a simple configuration and achieve high efficiency with low input (low power consumption) without sacrificing the effects of making the axial brightness distribution uniform. Our objective is to provide cathode discharge lamps.
従つて、本発明はこのような目的を達成するた
めに、外径が５〜10mmのガラスバルブの内面に青
色領域、緑色領域、赤色領域に発光ピークを有
し、かつ色温度が6500〓以上の発光層を形成する
と共に、ガラスバルブの両端に電極を、アーク長
が400mm以下となるように配設してなり、動作時
のランプ電流を２〜10ｍＡに設定したものであ
る。
Therefore, in order to achieve such an object, the present invention has an inner surface of a glass bulb with an outer diameter of 5 to 10 mm that has emission peaks in the blue region, green region, and red region, and has a color temperature of 6500〓 or more. In addition to forming a light-emitting layer, electrodes are arranged at both ends of the glass bulb so that the arc length is 400 mm or less, and the lamp current during operation is set to 2 to 10 mA.
しかし乍ら、ガラスバルブの外径が５mm未満で
は管電圧が高くなり、点灯回路の設計とも関連し
て低消費電力化が困難になる上、放電状態も不安
定になるし、逆に10mmを越えると、表示デバイス
のバツクライトシステムの奥行きが深くなる。
又、アーク長が400mmを越えると、管電圧が高く
なり、点灯回路の設計とも関連して低消費電力化
が困難になる上、放電状態も不安定になる。又、
ランプ電流が２ｍＡ未満になると、輝度が低下す
るのみならず、放電状態も不安定になるし、逆に
10ｍＡを越えると、電極スパツタが早期に発生し
て短寿命となる。さらに色温度が6500〓未満では
充分に満足しうる明瞭感、白色感が得られない。
従つて、上記範囲を逸脱することは好ましくな
い。 However, if the outer diameter of the glass bulb is less than 5 mm, the tube voltage will be high, which is related to the design of the lighting circuit, making it difficult to reduce power consumption, and the discharge state will also become unstable. Beyond this, the depth of the backlight system of the display device increases.
Furthermore, when the arc length exceeds 400 mm, the tube voltage becomes high, which makes it difficult to reduce power consumption due to the design of the lighting circuit, and the discharge state becomes unstable. or,
If the lamp current becomes less than 2mA, not only will the brightness decrease, but the discharge state will also become unstable;
If it exceeds 10mA, electrode spatter will occur early and the life will be shortened. Furthermore, if the color temperature is less than 6,500, a sufficiently satisfactory sense of clarity and whiteness cannot be obtained.
Therefore, it is not preferable to deviate from the above range.
次に、本発明の一実施例について第１図を参照
して説明する。
Next, an embodiment of the present invention will be described with reference to FIG.
図において、１は肉厚が0.65〜0.78mmで外径が
５〜10mmのガラスバルブであつて蛇行状に屈曲さ
れている。このガラスバルブ１の内面には青色領
域、緑色領域、赤色領域に発光ピークを有し、か
つ色温度が6800〓に設定された発光層２が形成さ
れている。そして、ガラスバルブ１の両端にはニ
ツケル、銅、鉄などの金属板にて構成された電極
３，３が、アーク長が200〜400mmとなるように配
設されており、この電極３，３から外部リード線
４，４が封止部を介して導出されている。 In the figure, reference numeral 1 is a glass bulb having a wall thickness of 0.65 to 0.78 mm and an outer diameter of 5 to 10 mm, and is bent in a meandering shape. A light-emitting layer 2 is formed on the inner surface of the glass bulb 1 and has emission peaks in the blue, green, and red regions and has a color temperature of 6800. Electrodes 3, 3 made of metal plates such as nickel, copper, or iron are arranged at both ends of the glass bulb 1 so that the arc length is 200 to 400 mm. External lead wires 4, 4 are led out through the sealing portion.
このように構成された冷陰極放電灯は例えば第
２図〜第３図に示すように反射板５及び液晶表示
パネル６との間に配置される。即ち、ガラスバル
ブ１の直線部１ａは放物反射面５ａに対応する部
分でかつ液晶表示パネル６の下面に密接するよう
に、直線部１ａを連結する蛇行部１ｂは液晶表示
パネル６、反射板５より喰み出すように配置され
る。 The cold cathode discharge lamp configured in this manner is arranged between the reflecting plate 5 and the liquid crystal display panel 6, for example, as shown in FIGS. 2 and 3. That is, the straight part 1a of the glass bulb 1 corresponds to the parabolic reflective surface 5a and is in close contact with the lower surface of the liquid crystal display panel 6, and the meandering part 1b connecting the straight part 1a corresponds to the liquid crystal display panel 6 and the reflective plate. It is arranged so that it protrudes from 5.
この構成において、冷陰極放電灯のガラスバル
ブ１の外径を７mm、肉厚を0.65mmとし、アーク長
を290mmとすると共に、発光層を450nｍに発光ピ
ークを有するユーロピウム付活アルミン酸バリウ
ムマグネシウム蛍光体（BaMg2Al16O27：Eu）20
重量％と544nｍに発光ピークを有するセリウム、
テルビウム付活リン酸ランタン蛍光体
（LaPO4：Cl、Tb）40重量％と611nｍに発光ピー
クを有するユーロピウム付活酸化イツトリウム蛍
光体（Y2O3：Eu）40重量％との混合蛍光体にて
形成し、かつガラスバルブ１内に水銀と封入圧
25torrのアルゴンを封入する。この冷陰極放電灯
を出力電圧周波数が35〜45KHzのインバータにて
ランプ電流が３ｍＡとなるように点灯させた処、
ランプ消費電力を含む総消費電力は1.2wで表示
板照明体の表面にて300ft−Ｌ輝度が得られ、表
示部分の輝度バラツキは±10％以内であつた。
又、冷陰極放電灯の温度上昇は殆んどなく、カラ
ー液晶パネルに密着させてもパネルの温度上昇も
なかつた。特に、冷陰極放電灯をカラー液晶パネ
ルに密着できたために、照明体の奥行きを従来の
扁平蛍光灯を用いたものの16mmより薄い12mmに改
善できた。さらには発光層の発光特性がカラー液
晶パネルのカラーフイルタの透過特性にマツチン
グしているために光の透過効率が著るしく改善で
き、原色が鮮かであり、色再現域が拡大し、表示
デバイスとしての効率も向上した。 In this configuration, the outer diameter of the glass bulb 1 of the cold cathode discharge lamp is 7 mm, the wall thickness is 0.65 mm, the arc length is 290 mm, and the light emitting layer is made of europium activated barium magnesium aluminate fluorescent material having an emission peak at 450 nm. Body (BaMg 2 Al 16 O 27 :Eu) 20
wt% and cerium with an emission peak at 544 nm,
A mixed phosphor consisting of 40% by weight of terbium-activated lanthanum phosphate phosphor (LaPO 4 :Cl, Tb) and 40% by weight of europium-activated yttrium oxide phosphor (Y 2 O 3 :Eu), which has an emission peak at 611 nm. mercury and sealing pressure inside the glass bulb 1.
Fill with 25 torr of argon. When this cold cathode discharge lamp was lit using an inverter with an output voltage frequency of 35 to 45 KHz, the lamp current was 3 mA.
The total power consumption including the lamp power consumption was 1.2 W, and a brightness of 300 ft-L was obtained on the surface of the display board illumination body, and the brightness variation in the display portion was within ±10%.
Furthermore, there was almost no rise in temperature of the cold cathode discharge lamp, and there was no rise in temperature of the panel even when it was placed in close contact with a color liquid crystal panel. In particular, by being able to place the cold cathode discharge lamp in close contact with the color liquid crystal panel, we were able to improve the depth of the lighting body to 12 mm, which is thinner than the 16 mm that would be achieved using conventional flat fluorescent lamps. Furthermore, since the light emitting properties of the light emitting layer are matched to the transmittance properties of the color filter of the color liquid crystal panel, the light transmission efficiency can be significantly improved, the primary colors are vivid, the color reproduction range is expanded, and the display The efficiency of the device has also improved.
以上のように本発明によれば、ガラスバルブの
外径、アーク長、発光層、ランプ電流を特定範囲
に規制することによつて、低入力で高効率化でき
る上、放電の安定性も改善できる。特に、ガラス
バルブに屈曲部を形成し表示デバイスに沿う面積
を拡大すれば、一層の高効率化が期待でき、輝度
の均一化も達成できる。
As described above, according to the present invention, by regulating the outer diameter of the glass bulb, arc length, light emitting layer, and lamp current within specific ranges, high efficiency can be achieved with low input, and the stability of discharge is also improved. can. In particular, if a bent portion is formed in the glass bulb to enlarge the area along the display device, even higher efficiency can be expected and even brightness can be achieved.
尚、本発明において、ガラスバルブは蛇行状、
円形の他、角形など表示デバイスに応じて適宜に
変更できる。又、その内面の発光層は上記実施例
以外の蛍光体を使用することもできる。 In addition, in the present invention, the glass bulb has a meandering shape,
In addition to the circular shape, the shape can be changed as appropriate, such as a square shape, depending on the display device. Further, for the light emitting layer on the inner surface, a phosphor other than those used in the above embodiments may be used.
第１図は本発明の一実施例を示す一部破断平面
図、第２図は表示デバイスへの適用状態を示す平
面図、第３図は第２図の側断面図である。
図中、１，１1はガラスバルブ、２は発光層、
３は電極である。
FIG. 1 is a partially cutaway plan view showing an embodiment of the present invention, FIG. 2 is a plan view showing an application state to a display device, and FIG. 3 is a side sectional view of FIG. 2. In the figure, 1, 1 1 is a glass bulb, 2 is a light emitting layer,
3 is an electrode.
Claims (1)
領域、緑色領域、赤色領域に発光ピークを有し、
かつ色温度が6500〓以上の発光層を形成すると共
に、ガラスバルブの両端に電極を、アーク長が
400mm以下となるように配設してなり、動作時の
ランプ電流を２〜10ｍＡに設定したことを特徴と
する受光形表示デバイスのバツクライト用の冷陰
極放電灯。 ２ 発光層の発光特性を受光形表示デバイスのカ
ラーフイルタの透過特性にマツチングさせたこと
を特徴とする特許請求の範囲第１項に記載の冷陰
極放電灯。 ３ ガラスバルブの、電極間に相当する任意部分
に屈曲部を形成したことを特徴とする特許請求の
範囲第１項ないし第２項に記載の冷陰極放電灯。[Claims] 1. Having luminescence peaks in the blue region, green region, and red region on the inner surface of a glass bulb with an outer diameter of 5 to 10 mm,
In addition to forming a light-emitting layer with a color temperature of 6500 or higher, electrodes are placed at both ends of the glass bulb and the arc length is
1. A cold cathode discharge lamp for backlighting a light-receiving type display device, characterized in that the lamp current is set at 2 to 10 mA during operation. 2. The cold cathode discharge lamp according to claim 1, wherein the light emitting characteristics of the light emitting layer are matched to the transmission characteristics of a color filter of a light receiving type display device. 3. The cold cathode discharge lamp according to claim 1 or 2, characterized in that a bent portion is formed at an arbitrary portion of the glass bulb corresponding to between the electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12035384A JPS60264039A (en) | 1984-06-11 | 1984-06-11 | Cold cathode electric-discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12035384A JPS60264039A (en) | 1984-06-11 | 1984-06-11 | Cold cathode electric-discharge lamp |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6256370A Division JP2720385B2 (en) | 1994-10-21 | 1994-10-21 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60264039A JPS60264039A (en) | 1985-12-27 |
| JPH0336272B2 true JPH0336272B2 (en) | 1991-05-30 |
Family
ID=14784117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12035384A Granted JPS60264039A (en) | 1984-06-11 | 1984-06-11 | Cold cathode electric-discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60264039A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62186405A (en) * | 1986-02-10 | 1987-08-14 | 株式会社日立製作所 | Surface light source unit |
| JPH0455407Y2 (en) * | 1986-12-18 | 1992-12-25 | ||
| JPH043387Y2 (en) * | 1987-07-27 | 1992-02-03 | ||
| JPH027350A (en) * | 1988-06-27 | 1990-01-11 | Hitachi Ltd | Low pressure electric-discharge lamp |
| JP2669063B2 (en) * | 1989-07-26 | 1997-10-27 | 日本電気株式会社 | LCD projection display |
| JP2720385B2 (en) * | 1994-10-21 | 1998-03-04 | 日本電気ホームエレクトロニクス株式会社 | Liquid crystal display |
| JP3107743B2 (en) * | 1995-07-31 | 2000-11-13 | カシオ計算機株式会社 | Electron-emitting electrode, method of manufacturing the same, and cold cathode fluorescent tube and plasma display using the same |
| US6000982A (en) * | 1995-07-31 | 1999-12-14 | Casio Computer Co., Ltd. | Method of manufacturing a cold-cathode for a discharge device |
| DE19744183B4 (en) * | 1997-10-07 | 2009-09-24 | Robert Bosch Gmbh | instrument cluster |
| JP3601775B2 (en) * | 1999-12-27 | 2004-12-15 | ハリソン東芝ライティング株式会社 | Backlight device and liquid crystal display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593648A (en) * | 1978-12-30 | 1980-07-16 | Matsushita Electric Works Ltd | Fluorescent lamp |
| JPS56114273A (en) * | 1980-02-15 | 1981-09-08 | Toshiba Corp | Fluorescent lamp |
| JPS5740853A (en) * | 1980-08-22 | 1982-03-06 | Nichia Denshi Kagaku Kk | Mercury vapor discharge lamp |
| JPS5951451A (en) * | 1982-09-17 | 1984-03-24 | Toshiba Electric Equip Corp | Fluorescent lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50850U (en) * | 1973-05-01 | 1975-01-07 |
-
1984
- 1984-06-11 JP JP12035384A patent/JPS60264039A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593648A (en) * | 1978-12-30 | 1980-07-16 | Matsushita Electric Works Ltd | Fluorescent lamp |
| JPS56114273A (en) * | 1980-02-15 | 1981-09-08 | Toshiba Corp | Fluorescent lamp |
| JPS5740853A (en) * | 1980-08-22 | 1982-03-06 | Nichia Denshi Kagaku Kk | Mercury vapor discharge lamp |
| JPS5951451A (en) * | 1982-09-17 | 1984-03-24 | Toshiba Electric Equip Corp | Fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60264039A (en) | 1985-12-27 |
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