EP0066495B1 - Discharge lamp of the cold-cathode type bent about two levels - Google Patents
Discharge lamp of the cold-cathode type bent about two levels Download PDFInfo
- Publication number
- EP0066495B1 EP0066495B1 EP82400898A EP82400898A EP0066495B1 EP 0066495 B1 EP0066495 B1 EP 0066495B1 EP 82400898 A EP82400898 A EP 82400898A EP 82400898 A EP82400898 A EP 82400898A EP 0066495 B1 EP0066495 B1 EP 0066495B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- discharge lamp
- bent
- sheet
- 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
Links
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/32—Special longitudinal shape, e.g. for advertising purposes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/16—Vessels; Containers
Definitions
- the present invention relates to a discharge lamp known as a cold cathode tube, with gas filling of the type consisting of a small diameter tube comprising at its two ends electrodes between which the high voltage discharge occurs.
- Tubes of this kind are currently used routinely for the production of letters for illuminated signs and their use is tending to develop also as light sources for various traffic lights. Indeed, these high voltage tubes have greater reliability than the incandescent lamps usually used in said signaling lights and a much longer service life.
- these tubes have other advantages such as an excellent yield in coloring and in brightness and the absence of focusing optics.
- the tube is shaped for its useful front part in the form of a meander or a spiral in a plane and the end bulbs containing the electrodes are bent behind the end of the useful front part of the tube.
- the tubes being bent in a meander or wound in a spiral according to a ply in a plane and the manufacturing techniques obliging, in the case of a meander in particular, to maintain a minimum radius of curvature of the tube which is hardly less than half the diameter, the parallel branches of the meander are spaced at least half a diameter and most often the diameter, this spacing is also necessary for cooling.
- the length of tube which can be accommodated in a given lamp surface is reduced and that miniaturized discharge lamps have a reduced lifetime compared to that of very long tubes. This problem is encountered in the case of miniaturized discharge lamps for repeating lights and so-called pedestrian lights, signaling lights as well as for various special purpose lamps.
- the present invention aims to remedy these drawbacks and it relates to a discharge lamp of the cold cathode tube type, characterized in that the tube of circular section is, between the two electrodes, bent or curved according to two layers located in two close parallel planes, the layout of the tube in one layer being intercalated with the layout of the tube in the other layer.
- the length of the tube being substantially equal to twice the length of the tube in a single ply of equivalent lamp surface, the life of the lamp is increased.
- the second ply of the tube is substantially in the same plane as said bulbs so that the overall thickness of the lamp is not substantially amended.
- the tube can be bent or bent in double meander or in double spiral but it is preferable in the case of a rectangular surface lamp to bend it in a flattened serpentine, the straight lengths of the tube joined by elbows in the oblique planes being located alternately in the front and in the rear.
- the reference 1a designates the tube in the upper ply and the reference 1b the tube in the lower ply, 2 the bent parts joining parts of the tube lying in the two plies, 3a and 3b the bent parts joining the tube parts respectively located both in the upper ply and both in the lower ply and 4 designates the bulbs containing the electrodes.
- lengths of tube 1a and 1b arranged in the two upper and lower plies succeed each other by being joined by bent portions 2, the bulbs 4 being placed at two ends of the surface.
- lengths of tube 1a joined by bent parts 3a follow one another in the upper ply, the length of tube 1a being on one edge of the ply being joined to the neighboring length 1b in the other ply by a bent part 2, said length 1b being joined to the other lengths 1b of the lower ply by bent parts 3b.
- the two bulbs 4 are located on the same side of the surface of the lamp.
- the tube parts 1 a and 1 b are bent in a spiral and joined in the center by a bent part 2.
- the bulbs 4 are placed at the free ends of the tube.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
La présente invention concerne une lampe à décharge dite tube à cathode froide, avec remplissage gazeux du type constitué par un tube de faible diamètre comportant à ses deux extrémités des électrodes entre lesquelles se produit la décharge à haute tension. Des tubes de ce genre sont à l'heure actuelle utilisés de façon courante pour la réalisation de lettres pour enseignes lumineuses et leur usage tend à se développer également comme sources lumineuses pour les feux de signalisation divers. En effet ces tubes à haute tension présentent une plus grande fiabilité que les lampes à incandescence utilisées habituellement dans lesdits feux de signalisation et une beaucoup plus longue durée de vie. En outre ces tubes présentent d'autres avantages tels qu'un excellent rendement en coloration et en luminosité et l'absence d'optique de focalisation. En général le tube est conformé pour sa partie frontale utile sous forme de méandre ou de spirale dans un plan et les bulbes d'extrémité renfermant les électrodes sont recourbés derrière l'extrémité de la partie frontale utile du tube.The present invention relates to a discharge lamp known as a cold cathode tube, with gas filling of the type consisting of a small diameter tube comprising at its two ends electrodes between which the high voltage discharge occurs. Tubes of this kind are currently used routinely for the production of letters for illuminated signs and their use is tending to develop also as light sources for various traffic lights. Indeed, these high voltage tubes have greater reliability than the incandescent lamps usually used in said signaling lights and a much longer service life. In addition, these tubes have other advantages such as an excellent yield in coloring and in brightness and the absence of focusing optics. In general, the tube is shaped for its useful front part in the form of a meander or a spiral in a plane and the end bulbs containing the electrodes are bent behind the end of the useful front part of the tube.
La durée de vie d'une telle lampe à décharge est conditionnée par l'absorption du gaz ionisé. En effet le rendement optimum est obtenu pour une pression donnée du gaz et l'absorption fait varier cette pression. L'absorption étant d'autant plus réduite que la surface d'échange thermique est plus grande, il en résulte que pour un diamètre donné il faut accroître la longueur du tube dans toute la mesure compatible avec l'encombrement autorisé pour la lampe. Les tubes étant pliés en méandrè ou enroulés en spirale selon une nappe dans un plan et les techniques de fabrication obligeant, dans le cas d'un méandre notamment, à maintenir un rayon minimum de courbure du tube qui est difficilement inférieur au demi-diamètre, les branches parallèles du méandre sont écartées d'au moins un demi-diamètre et le plus souvent du diamètre, cet écartement étant également nécessaire pour le refroidissement. Il en résulte que la longueur de tube qu'il est possible de loger dans une surface de lampe donnée est réduite et que des lampes à décharge miniaturisées ont une durée de vie réduite par rapport à celle des tubes de grande longueur. Ce problème se rencontre dans le cas des lampes à décharge miniaturisées pour les feux de répétition et les feux dits piétons, des feux de signalisation ainsi que pour différentes lampes pour usages spéciaux.The lifetime of such a discharge lamp is conditioned by the absorption of the ionized gas. In fact, the optimum efficiency is obtained for a given pressure of the gas and the absorption varies this pressure. The absorption being all the more reduced as the heat exchange surface is larger, it follows that for a given diameter it is necessary to increase the length of the tube to the fullest extent compatible with the space allowed for the lamp. The tubes being bent in a meander or wound in a spiral according to a ply in a plane and the manufacturing techniques obliging, in the case of a meander in particular, to maintain a minimum radius of curvature of the tube which is hardly less than half the diameter, the parallel branches of the meander are spaced at least half a diameter and most often the diameter, this spacing is also necessary for cooling. As a result, the length of tube which can be accommodated in a given lamp surface is reduced and that miniaturized discharge lamps have a reduced lifetime compared to that of very long tubes. This problem is encountered in the case of miniaturized discharge lamps for repeating lights and so-called pedestrian lights, signaling lights as well as for various special purpose lamps.
Un autre inconvénient de ces lampes est le caractère linéaire de la source lumineuse. La surface éclairante ayant l'aspect d'un trait large en méandre ou en spirale, la luminance ou brillance est réduite dans le rapport de la surface apparente du tube à la surface totale de la plage occupée par le tube. En outre l'aspect de la lampe qui peut être utilisée sans diffuseur, est peu esthétique du fait de l'aspect linéaire de la source. Dans le brevet U.S. N° 2 743 388 on a cherché à remédier à cet inconvénient en réalisant une lampe à brillance uniforme sur toute la surface mais le résultat a été obtenu en combinant deux tubes dont les sections non circulaires s'emboîtent pour donner une nappe sensiblement co-planaire. Cette solution nécessite deux tubes de sections spéciales et la fabrication est extrêmement complexe puisque les longueurs qui se recouvrent doivent être co-planaires. L'utilisation d'un tube unique est également décrite dans ce document.Another drawback of these lamps is the linear nature of the light source. The illuminating surface having the appearance of a wide meandering or spiral line, the luminance or brightness is reduced in the ratio of the apparent surface of the tube to the total surface of the area occupied by the tube. In addition, the appearance of the lamp, which can be used without a diffuser, is unattractive due to the linear appearance of the source. In US Pat. No. 2,743,388, an attempt has been made to remedy this drawback by producing a lamp with uniform brightness over the entire surface, but the result has been obtained by combining two tubes whose non-circular sections fit together to give a sheet. substantially co-planar. This solution requires two tubes of special sections and the manufacturing is extremely complex since the overlapping lengths must be co-planar. The use of a single tube is also described in this document.
La présente invention a pour but de remédier à ces inconvénients et elle a pour objet une lampe à décharge du type tube à cathode froide caractérisée en ce que le tube de section circulaire est, entre les deux électrodes, plié ou courbé selon deux nappes situées dans deux plans parallèles rapprochés, le tracé du tube dans une nappe s'intercalant avec le tracé du tube dans l'autre nappe. Avec cette disposition conforme à l'invention et sous réserve que le tracé du tube dans une nappe soit suffisamment dense, l'observateur placé sensiblement sur une perpendiculaire aux plans des nappes constituant la lampe verra simultanément les deux tracés du tube dans les deux nappes, ce qui donnera une luminosité uniforme sur toute la surface occupée par la lampe. La longueur du tube étant sensiblement égale au double de la longueur du tube en simple nappe de surface de lampe équivalente, la durée de vie de la lampe est accrue. Les bulbes d'extrémité contenant les électrodes étant normalement recourbés derrière la partie frontale utile du tube, la deuxième nappe du tube se trouve sensiblement dans le même plan que lesdits bulbes de sorte que l'encombrement en épaisseur de la lampe n'est sensiblement pas modifié.The present invention aims to remedy these drawbacks and it relates to a discharge lamp of the cold cathode tube type, characterized in that the tube of circular section is, between the two electrodes, bent or curved according to two layers located in two close parallel planes, the layout of the tube in one layer being intercalated with the layout of the tube in the other layer. With this arrangement in accordance with the invention and provided that the line of the tube in a sheet is sufficiently dense, the observer placed substantially on a perpendicular to the planes of the sheets making up the lamp will simultaneously see the two lines of the tube in the two sheets, which will give a uniform brightness over the entire surface occupied by the lamp. The length of the tube being substantially equal to twice the length of the tube in a single ply of equivalent lamp surface, the life of the lamp is increased. As the end bulbs containing the electrodes are normally curved behind the useful front part of the tube, the second ply of the tube is substantially in the same plane as said bulbs so that the overall thickness of the lamp is not substantially amended.
Le tube peut être plié ou courbé en double méandre ou en double spirale mais il est préférable dans le cas d'une lampe de surface rectangulaire de le plier en serpentin aplati, les longueurs rectilignes du tube réunies par des coudes dans les plans obliques se trouvant situées alternativement dans la nappe frontale et dans la nappe arrière.The tube can be bent or bent in double meander or in double spiral but it is preferable in the case of a rectangular surface lamp to bend it in a flattened serpentine, the straight lengths of the tube joined by elbows in the oblique planes being located alternately in the front and in the rear.
L'invention sera décrite plus en détail ci-après sous forme de trois modes de réalisation avec référence au dessin ci-annexé dans lequel :
- La figure 1 est une vue en plan d'une lampe à décharge pour feu de répétition de forme rectangulaire ; la figure 2 en est une vue en coupe par II-II de figure 1 ; la figure 3 est une vue en plan d'une lampe de même forme selon une autre forme de réalisation ; la figure 4 est une vue en coupe par IV-IV de figure 3 ; la figure 5 est une vue en plan d'une lampe à décharge miniaturisée de forme circulaire et la figure 6 est une vue en coupe par VI-VI de figure 5.
- Figure 1 is a plan view of a discharge lamp for a repeating light of rectangular shape; Figure 2 is a sectional view through II-II of Figure 1; Figure 3 is a plan view of a lamp of the same shape according to another embodiment; Figure 4 is a sectional view through IV-IV of Figure 3; FIG. 5 is a plan view of a miniaturized discharge lamp of circular shape and FIG. 6 is a sectional view through VI-VI of FIG. 5.
Dans les dessins la référence 1a désigne le tube dans la nappe supérieure et la référence 1 b le tube dans la nappe inférieure, 2 les parties coudées réunissant des parties du tube se trouvant dans les deux nappes, 3a et 3b les parties coudées réunissant des parties de tube se trouvant respectivement toutes les deux dans la nappe supérieure et toutes les deux dans la nappe inférieure et 4 désigne les bulbes contenant les électrodes.In the drawings the
Les caractéristiques de l'invention résultent clairement des dessins.The features of the invention appear clearly from the drawings.
Dans le mode de réalisation des figures 1 et 2 qui est le mode de réalisation préférentiel, des longueurs de tube 1a et 1b disposées dans les deux nappes supérieure et inférieure se succèdent en étant réunies par des parties coudées 2, les bulbes 4 étant placés aux deux extrémités de la surface.In the embodiment of Figures 1 and 2 which is the preferred embodiment, lengths of
Dans le mode de réalisation des figures 3 et 4 des longueurs de tube 1a réunies par des parties coudées 3a se font suite dans la nappe supérieure, la longueur de tube 1a se trouvant sur un bord de la nappe étant réunie à la longueur voisine 1b dans l'autre nappe par une partie coudée 2, ladite longueur 1b étant réunie aux autres longueurs 1b de la nappe inférieure par des parties coudées 3b. Les deux bulbes 4 sont situés du même côté de la surface de la lampe.In the embodiment of FIGS. 3 and 4, lengths of
Dans le mode de réalisation des figures 5 et 6 les parties de tube 1 a et 1 b sont recourbées en spirale et réunies au centre par une partie coudée 2. Les bulbes 4 sont placés aux extrémités libres du tube.In the embodiment of Figures 5 and 6 the
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT82400898T ATE21187T1 (en) | 1981-05-26 | 1982-05-14 | DISCHARGED LAMP WITH COLD CATHODE BENT IN TWO PLANES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8110419A FR2507011A1 (en) | 1981-05-26 | 1981-05-26 | DISCHARGE LAMP TUBE TYPE WITH COLD CATHODE CURVED ACCORDING TO TWO TABLECLOTHS |
| FR8110419 | 1981-05-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0066495A2 EP0066495A2 (en) | 1982-12-08 |
| EP0066495A3 EP0066495A3 (en) | 1983-08-03 |
| EP0066495B1 true EP0066495B1 (en) | 1986-07-30 |
Family
ID=9258892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82400898A Expired EP0066495B1 (en) | 1981-05-26 | 1982-05-14 | Discharge lamp of the cold-cathode type bent about two levels |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0066495B1 (en) |
| AT (1) | ATE21187T1 (en) |
| CA (1) | CA1192597A (en) |
| DE (1) | DE3272290D1 (en) |
| ES (1) | ES272873Y (en) |
| FR (1) | FR2507011A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154405B (en) * | 1984-01-10 | 1987-07-01 | Thorn Emi Domestic Appliances | Heating apparatus |
| US5536999A (en) * | 1994-12-02 | 1996-07-16 | Winsor Corporation | Planar fluorescent lamp with extended discharge channel |
| US5705883A (en) * | 1995-03-31 | 1998-01-06 | General Electric Company | Reduced length compact fluorescent lamp and method of forming same |
| GB9601418D0 (en) * | 1996-01-24 | 1996-03-27 | England Paul | Lighting device |
| US5914560A (en) * | 1997-09-30 | 1999-06-22 | Winsor Corporation | Wide illumination range photoluminescent lamp |
| US5903096A (en) * | 1997-09-30 | 1999-05-11 | Winsor Corporation | Photoluminescent lamp with angled pins on internal channel walls |
| 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 |
| US6075320A (en) * | 1998-02-02 | 2000-06-13 | Winsor Corporation | Wide illumination range fluorescent lamp |
| US6127780A (en) * | 1998-02-02 | 2000-10-03 | Winsor Corporation | Wide illumination range photoluminescent lamp |
| US6762556B2 (en) | 2001-02-27 | 2004-07-13 | Winsor Corporation | Open chamber photoluminescent lamp |
| US7121681B2 (en) * | 2003-10-10 | 2006-10-17 | Honeywell International, Inc. | Compact high-brightness fluorescent lamp system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2473878A (en) * | 1947-11-25 | 1949-06-21 | Gen Electric | Electric lamp of double spiral convolution |
| US2743388A (en) * | 1953-09-08 | 1956-04-24 | Samuel C Bartley | Electric lamp |
| NL98672C (en) * | 1958-09-05 | |||
| FR1464022A (en) * | 1965-11-16 | 1966-07-22 | Pat & Visseaux Claude | Device for lighting |
-
1981
- 1981-05-26 FR FR8110419A patent/FR2507011A1/en active Granted
-
1982
- 1982-05-14 AT AT82400898T patent/ATE21187T1/en active
- 1982-05-14 EP EP82400898A patent/EP0066495B1/en not_active Expired
- 1982-05-14 DE DE8282400898T patent/DE3272290D1/en not_active Expired
- 1982-05-14 CA CA000402959A patent/CA1192597A/en not_active Expired
- 1982-05-20 ES ES1982272873U patent/ES272873Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2507011A1 (en) | 1982-12-03 |
| FR2507011B1 (en) | 1985-05-03 |
| EP0066495A3 (en) | 1983-08-03 |
| ES272873Y (en) | 1984-04-16 |
| ATE21187T1 (en) | 1986-08-15 |
| ES272873U (en) | 1983-11-01 |
| EP0066495A2 (en) | 1982-12-08 |
| CA1192597A (en) | 1985-08-27 |
| DE3272290D1 (en) | 1986-09-04 |
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