JPS6337553A - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JPS6337553A JPS6337553A JP17970986A JP17970986A JPS6337553A JP S6337553 A JPS6337553 A JP S6337553A JP 17970986 A JP17970986 A JP 17970986A JP 17970986 A JP17970986 A JP 17970986A JP S6337553 A JPS6337553 A JP S6337553A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent lamp
- outer diameter
- secondary coil
- electrode filament
- coil
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 abstract description 14
- 238000003466 welding Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
Abstract
Description
【発明の詳細な説明】
主粟工皇肌且立旺
この発明は蛍光ランプに関し、特にバルブ外径が５〜１
０日の小形蛍光ランプにおける電極フィラメント構造に
関する。DETAILED DESCRIPTION OF THE INVENTION This invention relates to a fluorescent lamp, particularly a bulb with an outer diameter of 5 to 1.
Regarding the electrode filament structure in a small fluorescent lamp on day 0.
従来■肢血
画面サイズが４インチ程度までの小形液晶テレビの液晶
デイスプレィパネルのバンクライトとして賞月されてい
る蛍光ランプは、バルブ外径が５〜１０ｍ程度である小
形のものが使用されている。このバックライト用小形蛍
光ランプの電極はダブルコイルのフィラメントにエミッ
タ物質を塗布したものが一般的で、その−例を第４図乃
至第７図を参照して説明する。Traditionally, the fluorescent lamps that have been used as bank lights for small LCD TVs with screen sizes of up to 4 inches have been small, with a bulb outer diameter of about 5 to 10 m. There is. The electrodes of this compact fluorescent lamp for backlighting are generally double-coiled filaments coated with an emitter material, examples of which will be explained with reference to FIGS. 4 to 7.
第４図及び第５図は液晶デイスプレィパネル（１）のバ
ックライトとして使用される蛍光ランプ（２）の平面図
及び側面図で、図面の蛍光ランプ（２）はＵ字形のもの
を示し、このＵ字形蛍光ランプ（２）は偏平なケース（
３）に収納されて、ケース（３）上に配置された液晶デ
イスプレィパネル（１）を照明する。ケース（３）には
図示しないが、蛍光ランプ（２）の光を反射等して、ケ
ース（３）上でほぼ均一な輝度分布にする手段が組み込
まれている。Figures 4 and 5 are a plan view and a side view of a fluorescent lamp (2) used as a backlight for a liquid crystal display panel (1), and the fluorescent lamp (2) in the drawings is U-shaped; This U-shaped fluorescent lamp (2) has a flat case (
3) to illuminate the liquid crystal display panel (1) placed on the case (3). Although not shown in the drawings, the case (3) has a built-in means for reflecting the light from the fluorescent lamp (2) to create a substantially uniform luminance distribution on the case (3).
蛍光ランプ（２）はＵ字形のバルブ（４）の両端に、電
極フィラメント（５）（５）を具えたステム（６）（６
）を封入したもので、バルブ（４）の外径は５〜ｌ Ｑ
＊ｍである。一対の電極フィラメント（５）（５）は
同一構造で、その一方を第６図及び第７図より説明する
と、電極フィラメント（５）は夕／ゲステンの素線（７
）を巻回した１次コイル（８）と、この１次コイル（８
）を巻回した２次コイル（９）を有するダブルコイル型
フィラメントである。この電極フィラメント（５）は２
次コイル（９）から成るボディ部（ａ）と、２次コイル
（９）の両端から延びる１次コイル（８）の両端部であ
るレッグ部（ｂ）（ｂ）で構成され、レッグ部（ｂ）（
ｂ）がステム（６）から延びる２本の支柱線（１０）
（１０）の先端部にかしめや溶接等の手段によって電
気的機械的に接続され、ボディ部（ａ）にエミッタ物ｒ
Ｒ（１））が塗布される。エミッタ物質（１））は、バ
ルブ（４）にステム（６）（６）を封止した後の排気工
程で、熱分解されて電子放射性が付与される。The fluorescent lamp (2) has a U-shaped bulb (4) with a stem (6) (6) provided at each end with an electrode filament (5) (5).
), and the outer diameter of the valve (4) is 5~l Q
*m. A pair of electrode filaments (5) (5) have the same structure, and to explain one of them with reference to FIGS.
) is wound on the primary coil (8), and this primary coil (8
) is a double coil type filament having a secondary coil (9) wound around it. This electrode filament (5) is 2
It consists of a body part (a) consisting of a secondary coil (9), and leg parts (b) which are both ends of the primary coil (8) extending from both ends of the secondary coil (9). b) (
b) two strut lines (10) extending from the stem (6);
(10) is electrically and mechanically connected to the tip of the body part (a) by caulking or welding, and the emitter object r is connected to the body part (a).
R(1)) is applied. The emitter substance (1)) is thermally decomposed and given electron emissive properties in the evacuation process after the stem (6) (6) is sealed in the valve (4).
Ｂ ＜”° よ゛と る。占
上記小形液晶テレビのバフクライト用蛍光ランプ（２）
はバルブ外径が５〜Ｉｏｎと小さく、従って電極フィラ
メント（５）は全長の短い小形で、エミッタ物質（１）
）の保持容積の小さいものが使用されている。具体的に
説明すると、電極フィラメント（５）の素線（７）の線
径は５〜３０ｍＡの小電流を流す程度の約０．０４ｔｍ
で、１次コイル（８）の外径は約０．２ ｆｉ、２次コ
イル（９）の外径Ｄ！は約１鶴で、エミッタ物質（１）
）はボディ部（ａ）における１次コイル（８）に含浸さ
せて塗布される。ここで、エミッタ物質（１））の保持
容積は、ボディ部（ａ）の２次コイル（９）の全長及び
外径Ｄ１に比例するが、２次コイル（９）の全長はバル
ブ（４）の外径によって制約されるので、この全長の長
尺化は既に限界に達している。一方、２次コイル（９）
の外径り、を大きくすることはスペース的に容易である
が、外径ＤＩを大きくすると、線径の小さい素線（７）
を巻回した機械的強度の弱いコイル部分が揺れ動いて絡
み易くなる不都合が生じるので、２次コイル（９）の外
径Ｄ１は約ｌｔｍが限度である。従って、上述の寸法制
約で電極フィラメント（５）に塗布されるエミッタ物質
（１））の増量化が難しく、このエミッタ物質（１））
の量で次なる蛍光ランプ（２）の寿命が、長寿命である
液晶テレビの寿命に比べて大幅に短（て、液晶テレビが
寿命に達するまでの蛍光ランプ（２）の新品との交換頻
度が多くならざるを得ず、これが液晶テレビの商品的価
値を悪くしていた。B ＜”° It reads.Fluorescent lamp for Buffklight of the above-mentioned small LCD TV (2)
The outer diameter of the bulb is as small as 5-Ion, so the electrode filament (5) is small with a short overall length, and the emitter material (1)
) with a small holding volume are used. Specifically, the wire diameter of the wire (7) of the electrode filament (5) is about 0.04 tm, which is enough to flow a small current of 5 to 30 mA.
So, the outer diameter of the primary coil (8) is approximately 0.2 fi, and the outer diameter of the secondary coil (9) is D! is about 1 crane, and the emitter material (1)
) is applied by impregnating the primary coil (8) in the body part (a). Here, the holding volume of the emitter substance (1)) is proportional to the total length and outer diameter D1 of the secondary coil (9) of the body part (a), but the total length of the secondary coil (9) is Since it is limited by the outer diameter of the cylinder, increasing the total length has already reached its limit. On the other hand, the secondary coil (9)
It is easy to increase the outer diameter DI in terms of space, but if the outer diameter DI is increased, the wire (7) with a small diameter
The outer diameter D1 of the secondary coil (9) is limited to approximately ltm, since the mechanically weak coil portion around which the secondary coil (9) is wound tends to sway and become entangled. Therefore, due to the above-mentioned dimensional constraints, it is difficult to increase the amount of emitter material (1)) applied to the electrode filament (5).
The lifespan of the next fluorescent lamp (2) will be significantly shorter than that of the long-life LCD TV (because of this, the frequency of replacing the fluorescent lamp (2) with a new one until the LCD TV reaches the end of its lifespan) had to increase, and this was deteriorating the commercial value of LCD TVs.
それ故に、本発明の目的は、パルプ外径の小さな蛍光ラ
ンプの長寿命化を図ることにある。Therefore, an object of the present invention is to extend the life of a fluorescent lamp with a small pulp outer diameter.
、１ 占 ” るための
本発明は上記目的を、バルブの両端に、全長にわたり０
．６ｍｍ以下のほぼ同一外径のダブルコイルである電極
フィラメントを具えたことを特徴とする蛍光ランプにて
達成するものである。, 1. The present invention achieves the above object by providing 0 0.000 to 0.00000000000
．． This is achieved by a fluorescent lamp characterized by having an electrode filament that is a double coil with approximately the same outer diameter of 6 mm or less.
作■
全長にわたりほぼ同一外径で、この外径が０．６目以下
であるダブルコイルの電極フィラメントにエミッタ物質
を塗布すると、エミッタ物質は電極フィラメントの１次
コイルのみならず、２次コイルの空芯部分まで含浸して
塗布され、エミッタ物質の量が増大して、蛍光ランプの
長寿命化が実現される。■ When an emitter material is applied to a double-coil electrode filament whose outer diameter is approximately the same over its entire length and whose outer diameter is 0.6 mm or less, the emitter material covers not only the primary coil of the electrode filament but also the secondary coil. The coating is applied by impregnating the air core, increasing the amount of emitter material and extending the life of the fluorescent lamp.
裏施凱
第４図の小形液晶テレビ用蛍光ランプ（２）と同一サイ
ズのものに本発明を通用した一実施例を、第１図乃至第
３図に基づき以下説明する。An embodiment in which the present invention is applied to a fluorescent lamp (2) for a small liquid crystal television set of the same size as that shown in FIG. 4 will be described below with reference to FIGS. 1 to 3.
第１図はＵ字形蛍光ランプ（１２）を示し、これはＵ字
形バルブ（１３）の両端に電極フィラメント（１４）
（１４）を具えたステム（１５） （１５）を封止
した構造である。この蛍光ランプ（１２）はバルブ（１
３）の外径が５〜１０ｍｍの小形のもので、第４図の従
来蛍光ランプ（２）との相違点は電極フィラメント（１
４） （１４）のみである。Figure 1 shows a U-shaped fluorescent lamp (12), which has electrode filaments (14) at both ends of the U-shaped bulb (13).
Stem (15) with (14) This is a structure in which (15) is sealed. This fluorescent lamp (12) has a bulb (1
3) is a small one with an outer diameter of 5 to 10 mm.The difference from the conventional fluorescent lamp (2) in Fig. 4 is that the electrode filament (1
4) (14) only.
この１対の電極フィラメント（１４） （１４）は同
一構造で、その一方を第２図及び第３図より説明する。The pair of electrode filaments (14) (14) have the same structure, and one of them will be explained with reference to FIGS. 2 and 3.
電極フィラメント（１４）は、タングステンの素線（１
６）を巻回して形成した１次コイル（１７）を、全長に
わたり同一外径Ｄ２で巻回した２次コイル（１８）を所
定の長さで切断して得られたスティック状のダブルコイ
ルの両端部をステム（１５）から延びる２本の支柱線（
１９） （１９）の先端部にかしめや溶接等の手段で
電気的機械的に接続したもので、電極フィラメント（１
４）の支柱線（１９） （１９）の間にあるボディ部
（Ｃ）の２次コイル（１８）にエミッタ物質（２０）が
塗布される。ここで重要なことは、２次コイル（１８）
の外径Ｄ２を０．６ ｔｍ以下で好ましくは０．４鶴程
度に設定したことである
電極フィラメント（１４）の素線（１６）の線径、１次
コイル（１７）の外径は従来と同様でよく、２次コイル
（１８）の外径Ｄ２を０．６ ｔｍ以下にすることで、
この２次コイル（１８）のボディ部（ｃ）に塗布される
エミッタ物！ （２０）は、第３図に示すように１次コ
イル（１７）内のみならず、２次コイル（１８）内にも
含浸されて、エミッタ物質（２０）の量が増大すること
が実験的に認められた。尚、２次コイル（１８）の外ｎ
Ｄ ｚを０．６ ｔｍより大きくすると、２次コイル
（１８）の空芯部分でのエミッタ物質の保持性が低下し
てしまいエミッタ物質（２０）の増量効果が薄れ、また
、無理に担持させると、エミッタ物質（２０）の量が多
くなり過ぎて、排気工程での熱分解が十分に行い難くな
ることがあり、また、外径Ｄ２を小さくする程に２次コ
イル（１８）の形成が難しく、エミッタ物質保持容積が
小さくなり、外径Ｄ２は０．４ ｔｍ前後が望ましい。The electrode filament (14) is a tungsten wire (1
A stick-shaped double coil obtained by cutting a secondary coil (18) wound at a predetermined length by winding the primary coil (17) with the same outer diameter D2 over the entire length. Two strut lines (
19) An electrode filament (19) that is electrically and mechanically connected to the tip of (19) by caulking, welding, etc.
An emitter material (20) is applied to the secondary coil (18) of the body part (C) between the strut wires (19) (19) of (4). The important thing here is that the secondary coil (18)
The outer diameter D2 of the wire (16) of the electrode filament (14) and the outer diameter of the primary coil (17) are set to 0.6 tm or less, preferably about 0.4 tm. It may be the same as, by setting the outer diameter D2 of the secondary coil (18) to 0.6 tm or less,
The emitter material applied to the body part (c) of this secondary coil (18)! Experimentally, it has been shown that (20) is impregnated not only in the primary coil (17) but also in the secondary coil (18), increasing the amount of emitter substance (20), as shown in Figure 3. was recognized. In addition, outside the secondary coil (18)
If D z is made larger than 0.6 tm, the retention of the emitter substance in the air core portion of the secondary coil (18) will be reduced, the effect of increasing the amount of the emitter substance (20) will be weakened, and the emitter substance (20) will be forced to be supported. In this case, the amount of the emitter material (20) becomes too large, which may make it difficult to perform thermal decomposition in the exhaust process sufficiently.In addition, the smaller the outer diameter D2, the more difficult it is to form the secondary coil (18). This is difficult, and the emitter material holding volume is small, so the outer diameter D2 is preferably around 0.4 tm.
尚、本発明はＵ字形蛍光ランプに限らず、直管形蛍光ラ
ンプやＳ字形等の曲管型蛍光ランプにおいても、同様に
通用される。It should be noted that the present invention is not limited to U-shaped fluorescent lamps, but can be similarly applied to curved-tube fluorescent lamps such as straight tube fluorescent lamps and S-shaped fluorescent lamps.
ｌユ坐処来
本発明によれば、小形の蛍光ランプにおける電極フィラ
メントのエミッタ物質の増量化が容易に実現されて、蛍
光ランプの長寿命化が図れ、特に画面サイズが４インチ
程度までの小形液晶テレビにおける液晶デイスプレィパ
ネル用バックライトとしての小形蛍光ランプにおいて長
寿命化の実効は大きく、小形液晶テレビの商品的価値を
一段と向上させる蛍光ランプが提供できる。According to the present invention, it is possible to easily increase the amount of emitter material in the electrode filament in a small fluorescent lamp, thereby extending the life of the fluorescent lamp. The long life of a small fluorescent lamp used as a backlight for a liquid crystal display panel in a liquid crystal television is greatly effective, and a fluorescent lamp can be provided that further improves the commercial value of a small liquid crystal television.
第１図は本発明に係る蛍光ランプの一実施例を示す一部
断面部分を含む平面図、第２図は第１図の蛍光ランプに
おける電極フィラメントの一部省略部分を含む拡大正面
図、第３図は第２図のＡ−Ａ線に沿う拡大断面図である
。
第４図は従来の蛍光ランプの一部断面部分を含む平面図
、第５図は第４図の蛍光ランプの正面図、第６図は第４
図の蛍光ランプにおける電極フィラメントの一部省略部
分を含む拡大正面図、第７図は第６図のＢ−Ｂ線に沿う
断面図である。
（１２）−・−蛍光ランプ、（１３）−・−バルブ、（
１４）・・・ｆｆ１ｉフイラメント。
特 許 出 願 人 日本電気ホーム
エレクトロニクス株式会社
代 理 人 江 原 省
吾第 ４ 図FIG. 1 is a plan view including a partially sectional portion showing an embodiment of the fluorescent lamp according to the present invention; FIG. 2 is an enlarged front view including a partially omitted portion of the electrode filament in the fluorescent lamp of FIG. 1; FIG. 3 is an enlarged sectional view taken along line A--A in FIG. 2. FIG. 4 is a plan view including a partial cross section of a conventional fluorescent lamp, FIG. 5 is a front view of the fluorescent lamp in FIG. 4, and FIG.
FIG. 7 is an enlarged front view including a partially omitted part of the electrode filament of the fluorescent lamp shown in the figure, and FIG. 7 is a sectional view taken along the line BB in FIG. 6. (12)--Fluorescent lamp, (13)--Bulb, (
14)...ff1i filament. Patent applicant: NEC Home Electronics Co., Ltd. Agent: Gangwon Province
Figure 4
Claims (1)
ほぼ同一外径のダブルコイルである電極フィラメントを
具えたことを特徴とする蛍光ランプ。(1) A fluorescent lamp characterized by having electrode filaments, which are double coils having approximately the same outer diameter of 0.6 mm or less over the entire length, at both ends of the bulb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61179709A JPH088087B2 (en) | 1986-07-30 | 1986-07-30 | Fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61179709A JPH088087B2 (en) | 1986-07-30 | 1986-07-30 | Fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6337553A true JPS6337553A (en) | 1988-02-18 |
| JPH088087B2 JPH088087B2 (en) | 1996-01-29 |
Family
ID=16070502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61179709A Expired - Lifetime JPH088087B2 (en) | 1986-07-30 | 1986-07-30 | Fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH088087B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59177849A (en) * | 1983-03-29 | 1984-10-08 | Toshiba Corp | Fluorescent lamp |
-
1986
- 1986-07-30 JP JP61179709A patent/JPH088087B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59177849A (en) * | 1983-03-29 | 1984-10-08 | Toshiba Corp | Fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH088087B2 (en) | 1996-01-29 |
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