JPH02267851A - Discharge lamp - Google Patents
Discharge lampInfo
- Publication number
- JPH02267851A JPH02267851A JP1088003A JP8800389A JPH02267851A JP H02267851 A JPH02267851 A JP H02267851A JP 1088003 A JP1088003 A JP 1088003A JP 8800389 A JP8800389 A JP 8800389A JP H02267851 A JPH02267851 A JP H02267851A
- Authority
- JP
- Japan
- Prior art keywords
- trigger electrode
- conductive film
- discharge lamp
- shape
- tube wall
- 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
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000007639 printing Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 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
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Discharge Lamps And Accessories Thereof (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〕
この発明は、特にバック照明用光源に適した蛍光ランプ
等の放電ランプに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a discharge lamp such as a fluorescent lamp, which is particularly suitable as a light source for backlighting.
表示装置等においては、液晶などは自発光素子でないた
め、例えば第４図に示すようなバック照明装置か用いら
れる。第４図（ａ）は正面図、第４図（ｂ）はその側面
図を示したもので、図において、１は管径がφ５〜φ７
程度の冷陰極蛍光ランプ、２は蛍光ランプ１の前面（上
面）に配置されたアクリル樹脂等の乳白色の樹脂から成
る光拡散板、３は蛍光ランプ１の背面（下面）に配置さ
れた反射率の高い反射板で、白色の樹脂、鏡面仕上げし
たアルミニウム等の光沢を有する金属、あるいは同等の
反射効果が得られる材料で形成されている。In display devices and the like, since liquid crystals and the like are not self-luminous elements, for example, a back lighting device as shown in FIG. 4 is used. Figure 4(a) shows the front view, and Figure 4(b) shows the side view. In the figure, 1 indicates a pipe diameter of φ5 to φ7.
2 is a light diffusion plate made of milky white resin such as acrylic resin placed on the front (top) of the fluorescent lamp 1, and 3 is a reflectance plate placed on the back (bottom) of the fluorescent lamp 1. It is a highly reflective plate made of white resin, a glossy metal such as mirror-finished aluminum, or a material that provides the same reflective effect.
−Ｆ記蛍光ランプ１の管壁４の前面側には第５図（ａ）
に示すような縞模様の遮光膜５が形成されており、また
管壁４の背面側には第５図（ｂ）に示すような帯状の導
電膜６が形成されている。すなわち、光拡散板２の蛍光
ランプ１に近いところでは、他の部分より明るくなって
しまい、照明にむらが生じる。そこで、蛍光ランプ１の
管壁４に上記のような縞模様の遮光膜５を設け、蛍光ラ
ンプ１から光拡散板２への直射照度を減らし、表示部の
むらを改善している。また、冷陰極蛍光ランプｌの低温
における放電開始電圧を低くするため、上記のような帯
状の導電膜６をトリガ電極として管壁４に設けている。- On the front side of the tube wall 4 of the fluorescent lamp 1 shown in Fig. 5(a)
A striped light-shielding film 5 as shown in FIG. 5 is formed, and a strip-shaped conductive film 6 as shown in FIG. 5(b) is formed on the back side of the tube wall 4. That is, a portion of the light diffusing plate 2 near the fluorescent lamp 1 becomes brighter than other portions, resulting in uneven illumination. Therefore, a light-shielding film 5 having a striped pattern as described above is provided on the tube wall 4 of the fluorescent lamp 1 to reduce the direct illuminance from the fluorescent lamp 1 to the light diffusing plate 2, thereby improving the unevenness of the display section. Furthermore, in order to lower the discharge starting voltage of the cold cathode fluorescent lamp 1 at low temperatures, the above-mentioned strip-shaped conductive film 6 is provided on the tube wall 4 as a trigger electrode.
これらの遮光膜５及び導電膜６は、先ず導電膜６が塗布
法あるいは印刷法により形成され、その後遮光膜５が印
刷法により形成される。なお、第５図中７はリード線、
８は排気管である。The light shielding film 5 and the conductive film 6 are formed by first forming the conductive film 6 by a coating method or a printing method, and then by forming the light shielding film 5 by a printing method. In addition, 7 in Fig. 5 is a lead wire,
8 is an exhaust pipe.
（発明が解決しようとする課題〕
従来のバック照明等に使用される放電ランプは上記のよ
うに構成されており、導電Ｍ６を形成した後遮光膜５を
形成しているので、各々の位置合せが困難でずれ易く、
配光にむらか生じ、また管壁４の両側に膜があるので全
光束が減少し、表示部側（照明側）の輝度が低下すると
いう問題点があった。(Problems to be Solved by the Invention) Conventional discharge lamps used for back lighting, etc. are configured as described above, and the light shielding film 5 is formed after the conductive M6 is formed, so each alignment is difficult. is difficult and easily slips off,
There were problems in that the light distribution was uneven, and since there were films on both sides of the tube wall 4, the total luminous flux was reduced, and the brightness on the display side (illumination side) was reduced.
この発明は、このような問題点に着目してなされたもの
で、配光むらが減少し、表示部側の輝度が上昇し、また
製造工程が少なく安価な放電ランプを得ることを目的と
している。This invention was made in view of these problems, and aims to provide an inexpensive discharge lamp that reduces uneven light distribution, increases brightness on the display side, and requires fewer manufacturing steps. .
（課題を解決するための手段〕
この発明の放電ランプは、管壁に遮光膜を兼ねた所望形
状のトリガ電極となる導電膜を設けたものであり、また
その導電膜を櫛形、梯子状あるいは三角波状に形成した
ものである。(Means for Solving the Problems) The discharge lamp of the present invention is provided with a conductive film serving as a trigger electrode having a desired shape, which also serves as a light-shielding film, on the tube wall, and the conductive film is formed in a comb shape, a ladder shape, or a shape of a ladder. It is formed into a triangular wave shape.
（作用〕
この発明の放電ランプにおいては、導電膜が遮光１模を
兼ねているので、位置合せのずれがなく、製造工程も少
なく、また１摸の形成は管壁の片側だけとなる。(Function) In the discharge lamp of the present invention, since the conductive film also serves as a light shielding layer, there is no misalignment, the number of manufacturing steps is small, and the layer is only formed on one side of the tube wall.
第１図はこの発明の一実施例を示す平面図であり、冷陰
極蛍光ランプ１の表示部側（照明側）の管壁４の構成を
示している。すなわち、この蛍光ランプ１の管壁４には
遮光膜を兼ねた所望形状のトリガ電極となる導電膜９が
形成されている。この遮光膜を兼ねた導電Ｍ９は、例え
ば面積抵抗３０〜ＩＯＫΩ／Ｉａ１程度のカーボン系導
電性ペーストからなるインキを印刷することにより形成
される。また、図中７，８はリード線及び排気管である
。FIG. 1 is a plan view showing an embodiment of the present invention, showing the configuration of a tube wall 4 on the display side (illumination side) of the cold cathode fluorescent lamp 1. As shown in FIG. That is, a conductive film 9 is formed on the tube wall 4 of the fluorescent lamp 1 and serves as a trigger electrode having a desired shape and also serves as a light shielding film. The conductive layer M9, which also serves as a light-shielding film, is formed, for example, by printing ink made of a carbon-based conductive paste having a sheet resistance of about 30 to IOKΩ/Ia1. Further, numerals 7 and 8 in the figure are lead wires and exhaust pipes.
第２図は上記導電膜９の種々の印刷パターンを示したも
ので、第２図（ａ）は梯子状、第２図（ｂ）は棚状、第
２図（Ｃ）は櫛形、第２図（ｄ）は三角波状にそれぞれ
形成した場合を示している。FIG. 2 shows various printed patterns of the conductive film 9. FIG. 2(a) shows a ladder-like pattern, FIG. 2(b) shows a shelf-like pattern, and FIG. 2(C) shows a comb-like pattern. Figure (d) shows a case in which they are each formed in a triangular wave shape.
上記のように構成された冷陰極蛍光ランプｌにおいては
、管壁４に設けられた導電膜９によって管壁４に付着し
た電荷が取り除かれるので、放電開始電圧が低減される
。この放電開始電圧は、導電膜９の抵抗値の高低よりも
占有面積の大小に影響され易く、占有面積の大きい方が
低くなる。本実施例では第１図及び第２図に示すように
、導電膜９の占有面積が従来の帯状のものと比べて大き
く、放電開始電圧は大きく低減される。特に、低温にお
いてはその効果が大である。In the cold cathode fluorescent lamp 1 configured as described above, the electric charge attached to the tube wall 4 is removed by the conductive film 9 provided on the tube wall 4, so that the discharge starting voltage is reduced. This discharge starting voltage is more easily influenced by the size of the occupied area than by the resistance value of the conductive film 9, and becomes lower as the occupied area is larger. In this embodiment, as shown in FIGS. 1 and 2, the area occupied by the conductive film 9 is larger than that of the conventional strip-shaped conductive film, and the firing voltage is greatly reduced. The effect is particularly great at low temperatures.
また、導電膜９は遮光膜を兼ねているので、両者の位置
ずれからくる配向むらがなくなると共に、表示部側の輝
度が上昇し、製造工程も１工程減るので、安価なものと
なる。Further, since the conductive film 9 also serves as a light-shielding film, alignment unevenness caused by misalignment between the two is eliminated, the brightness on the display side increases, and the manufacturing process is reduced by one, resulting in an inexpensive product.
ここで、表示部側の配光は導電膜９の印刷パターンによ
って変えられるが、冷陰極蛍光ランプ１をＩＫＩＩｚ以
上の高周波で点灯する場合、導電膜９の抵抗値が低いか
あるいはその占有面積が大きいと、第３図に示すように
高周波電源ｌＯからのランプ電ｆｔＩＬの一部がリーク
電流■、として導電ｙＡ９に流ね、放電電流１２が減少
し、輝度か減少することがある。しかし、このような場
合でも、第１図あるいは第２図（ｄ）のように導電路の
長い導電膜９を形成するか、あるいは導電膜９の＠厚及
び線幅のコントロールによって導電膜９の両側で適当な
抵抗値を付与することにより、上記リーク電流■、を減
少させることができる。Here, the light distribution on the display side can be changed by the printed pattern of the conductive film 9, but when lighting the cold cathode fluorescent lamp 1 at a high frequency of IKIIz or higher, the resistance value of the conductive film 9 is low or its occupied area is If it is large, as shown in FIG. 3, a part of the lamp electric current ftIL from the high-frequency power source 1O flows into the conductor yA9 as a leakage current 1, reducing the discharge current 12 and the brightness. However, even in such a case, the conductive film 9 can be changed by forming a conductive film 9 with a long conductive path as shown in FIG. 1 or FIG. 2(d), or by controlling the thickness and line width of the conductive film 9. By providing appropriate resistance values on both sides, the above leakage current (2) can be reduced.
このように、導電膜９の形成は従来よりも自由度が高く
、また背面側に導電膜がないので、蛍光ランプ１の全光
束が５％程度上昇し、表示部側の輝度が２〜３％程度上
昇する。In this way, the formation of the conductive film 9 has a higher degree of freedom than before, and since there is no conductive film on the back side, the total luminous flux of the fluorescent lamp 1 increases by about 5%, and the brightness on the display side increases by 2 to 3%. % increase.
なお、この発明は平面光源あるいは同等の構造の照明装
置に使用される冷陰極蛍光ランプに対して有効であるが
、冷陰極蛍光ランプ以外の放電ランプ、例えば熱陰極蛍
光ランプ、水銀ランプ等に対しても有効である。This invention is effective for flat light sources or cold cathode fluorescent lamps used in lighting devices of equivalent structure, but it is also effective for discharge lamps other than cold cathode fluorescent lamps, such as hot cathode fluorescent lamps, mercury lamps, etc. It is also effective.
以トのように、この発明によれば、管壁に遮光膜を兼ね
た導電膜を形成するようにしたため、配光むらが減少し
、表示部側の輝度が上昇し、また製造工程が少なくなり
、安価なものになるという効果があり、放電開始電圧も
さらに低くなるという効果が得られる。As described above, according to the present invention, since a conductive film that also serves as a light shielding film is formed on the tube wall, unevenness in light distribution is reduced, brightness on the display side is increased, and the manufacturing process is reduced. This has the effect of making it cheaper and further lowering the discharge starting voltage.
第１図はこの発明の一実施例を示す平面図、第２図（ａ
）、（ｂ）、（Ｃ）、（ｄ）は第１図の導電膜の種々の
印刷パターンを示す図、第３図は導電膜にリーク電流が
流れる場合を示す説明図、第４図（ａ）、（ｂ）はバッ
ク照明装置を示す平面図及び側面図、第５図（ａ）、（
ｂ）は従来の放電ランプの構成を示すｔ面図である。
１・・・・・・冷陰極蛍光ランプ
４・・・−管壁FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
), (b), (C), and (d) are diagrams showing various printed patterns of the conductive film in Figure 1, Figure 3 is an explanatory diagram showing the case where leakage current flows through the conductive film, and Figure 4 ( a), (b) are a plan view and a side view showing the back illumination device, and Fig. 5 (a), (
b) is a t-plane view showing the configuration of a conventional discharge lamp. 1...Cold cathode fluorescent lamp 4...-Tube wall
Claims (4)
る導電膜を設けたことを特徴とする放電ランプ。(1) A discharge lamp characterized in that a conductive film serving as a trigger electrode having a desired shape and serving as a light shielding film is provided on the tube wall.
項１記載の放電ランプ。(2) The discharge lamp according to claim 1, wherein the conductive film is formed in a comb shape.
求項１記載の放電ランプ。(3) The discharge lamp according to claim 1, wherein the conductive film is formed in a ladder shape.
請求項１記載の放電ランプ。(4) The discharge lamp according to claim 1, wherein the conductive film is formed in a triangular wave shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1088003A JPH02267851A (en) | 1989-04-10 | 1989-04-10 | Discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1088003A JPH02267851A (en) | 1989-04-10 | 1989-04-10 | Discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02267851A true JPH02267851A (en) | 1990-11-01 |
Family
ID=13930613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1088003A Pending JPH02267851A (en) | 1989-04-10 | 1989-04-10 | Discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02267851A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10228119B2 (en) | 2015-12-14 | 2019-03-12 | Lg Electronics Inc. | Light source module |
| US10401015B2 (en) | 2015-07-06 | 2019-09-03 | Lg Electronics Inc. | Light source module, fabrication method therefor, and lighting device including the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5715919U (en) * | 1980-06-30 | 1982-01-27 | ||
| JPH0296426U (en) * | 1989-01-20 | 1990-08-01 |
-
1989
- 1989-04-10 JP JP1088003A patent/JPH02267851A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5715919U (en) * | 1980-06-30 | 1982-01-27 | ||
| JPH0296426U (en) * | 1989-01-20 | 1990-08-01 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10401015B2 (en) | 2015-07-06 | 2019-09-03 | Lg Electronics Inc. | Light source module, fabrication method therefor, and lighting device including the same |
| US10228119B2 (en) | 2015-12-14 | 2019-03-12 | Lg Electronics Inc. | Light source module |
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