WO2005083745A1 - Lampe fluorescent plane - Google Patents

Lampe fluorescent plane Download PDF

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Publication number
WO2005083745A1
WO2005083745A1 PCT/KR2005/000513 KR2005000513W WO2005083745A1 WO 2005083745 A1 WO2005083745 A1 WO 2005083745A1 KR 2005000513 W KR2005000513 W KR 2005000513W WO 2005083745 A1 WO2005083745 A1 WO 2005083745A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
fluorescent lamp
electrode portions
flat fluorescent
discharge
Prior art date
Application number
PCT/KR2005/000513
Other languages
English (en)
Inventor
Tae-Young Lim
Young-Muk Kim
Min-Su Lim
Myoung-Ho Lee
Original Assignee
Youyang Airport Lighting Equipment Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Youyang Airport Lighting Equipment Inc. filed Critical Youyang Airport Lighting Equipment Inc.
Priority to JP2007500681A priority Critical patent/JP4606456B2/ja
Publication of WO2005083745A1 publication Critical patent/WO2005083745A1/fr

Links

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
    • H01J61/305—Flat vessels or containers
    • H01J61/307—Flat vessels or containers with folded elongated discharge path
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode

Definitions

  • the present invention relates to a flat fluorescent lamp, and more particularly, to a flat fluorescent lamp with stable discharge and uniform brightness.
  • FIG. 7 is a sectional view showing the structure of a conventional flat fluorescent lamp with opposite electrodes arranged thereon, wherein front and rear panel units 10 and
  • the front panel unit 10 comprises a transparent electrode layer 11, a front glass substrate 12 and a front fluorescent layer 13, which are sequentially stacked one above another.
  • the rear panel unit 20 comprises a rear glass substrate 21, an electrode layer 22, a dielectric layer 23 and a rear fluorescent layer 24, which are sequentially stacked one above another.
  • Such a conventional flat fluorescent lamp with opposite electrodes arranged thereon is characterized by efficiently converting ultraviolet rays emitted upon discharge into visible rays through arrangement of the fluorescent layers 13 and 24 in the front and rear panel units 10 and 20.
  • Fig. 8 shows another example of a conventional flat fluorescent lamp, i.e. a surface discharge type flat fluorescent lamp with linear electrodes arranged on one side thereof.
  • front and rear panel units 40 and 50 are fixed to a support frame 60 to define a discharge space filled with an inert gas.
  • the front panel unit 40 comprises a front glass substrate 42 with a fluorescent layer 41 applied to a bottom surface thereof.
  • the rear panel unit 50 comprises a rear glass substrate 51, linear electrodes 52, and dielectric layers 53 for electrically insulating the linear electrodes 52 and lowering a discharge starting voltage, which are sequentially stacked one above another.
  • the electrodes are placed on only one of the glass substrates of the flat fluorescent lamp, contrary to the flat fluorescent lamp of Fig. 7. Since electrons and cations do not collide directly against the fluorescent layer in case of the arrangement of the linear electrodes on one side, there are advantages in that sputtering of the fluorescent layer 41 and the linear electrodes 52 is prevented, thereby prolonging the life of the fluorescent lamp.
  • a flat fluorescent lamp uses the linear electrodes, there are problems in that a lighting voltage becomes high and power consumption increases.
  • Figs. 9 and 10 show a further example of a conventional flat fluorescent lamp, wherein a fundamental discharge concept thereof is the same as the fluorescent lamp of Fig. 7 and anode electrodes are in pairs for dielectrically hindered discharge.
  • the fluorescent lamp of Fig. 9 comprises a support frame 90 to define a discharge space filled with an inert gas between front and rear panel units 70 and 80.
  • the front panel unit 70 comprises a front glass substrate 72 with a fluorescent layer 71 applied to a bottom surface thereof.
  • the rear panel unit 80 comprises a rear glass substrate 81, linear electrodes 82, a dielectric layer 83 for electrically insulating the linear electrodes 82 and lowering a discharge starting voltage, and a fluorescent layer 84, which are sequentially stacked one above another.
  • Fig. 10 shows the planar configuration of the linear electrodes provided in the fluorescent lamp of Fig. 9, wherein each of the linear electrodes 82 includes anodes 82a and a cathode 82b and is driven in a DC impulse manner.
  • the anodes 82a and the cathode 82b are formed of strip leads.
  • the anodes 82a are in pairs, and a strip lead of one cathode 82b is disposed most adjacent to a relevant pair of anodes 82a.
  • the strip lead of the cathode 82b is formed with a plurality of needle-shaped protrusions P for partial discharge.
  • a DC impulse when a DC impulse is applied to the anodes 82a and the cathode 82b, delta-shaped partial discharge occurs between the strip leads of the anodes 82a and the protrusions P of the strip lead of the cathode 82b to emit visual rays.
  • An object of the present invention is to provide a flat fluorescent lamp of which two electrodes have the same electrode structure and which is driven by an AC power source to achieve stable discharge and uniform brightness distribution.
  • the flat fluorescent lamp of the present invention comprises a front panel with a fluorescent material applied thereto; a rear panel including a reflecting plate, first and second electrode portions printed to be electrically insulated, a dielectric layer and a fluorescent material; and a support for supporting the front and rear panels and maintaining a sealed state.
  • Each of the first and second electrode portions is formed of a pair of strip leads to construct the same electrode, a plurality of protrusions are symmetrically formed to protrude outward on the pair of strip leads, and the first and second electrode portions are disposed alternately.
  • Fig. 1 is a partially cut-away perspective view of a flat fluorescent lamp of the present invention.
  • Fig. 2 is a view showing a preferred example of an electrode structure provided in the flat fluorescent lamp according to the present invention.
  • Fig. 3 is a view showing a preferred example of spacers provided in flat fluorescent lamp according to the present invention.
  • Fig. 4 is a view showing another example of the flat fluorescent lamp according to the present invention.
  • Fig. 5 a view showing a preferred example of a driving circuit for driving the flat fluorescent lamp according to the present invention.
  • Fig. 6 is a view showing waveforms of input and output signals of the driving circuit of Fig. 5.
  • Figs. 7 to 10 show a variety of examples of conventional flat fluorescent lamps.
  • FIGs. 1 to 6 show a flat fluorescent lamp of the present invention, wherein Fig. 1 is a partially cut-away perspective view of the flat fluorescent lamp of the present invention, Fig. 2 is a view showing a preferred example of an electrode structure provided in the flat fluorescent lamp according to the present invention, Fig. 3 is a view showing a preferred example of spacers provided in flat fluorescent lamp according to the present invention, Fig. 4 is a view showing another example of the flat fluorescent lamp according to the present invention, Fig. 5 a view showing a preferred example of a driving circuit for driving the flat fluorescent lamp according to the present invention, and Fig. 6 is a view showing waveforms of input and output signals of the driving circuit of Fig. 5.
  • the flat fluorescent lamp of the present invention shown in Fig. 1 comprises a front panel 110, a rear panel 170 and a support 180 for defining a discharge space between the front and rear panels 110 and 170.
  • the front panel 110 has a fluorescent material 111 applied a bottom surface thereof that serves a light-exiting surface through which light generated from the fluorescent lamp exits.
  • the rear panel 70 comprises a reflecting plate 120, first and second electrode portions 130 and 140, a dielectric layer 150 and a fluorescent material 160.
  • the reflecting plate 120 disposed on a top surface of the rear panel 170 enhances use efficiency of light by reflecting light toward the light-exiting surface and also causes the entire light-exiting surface of the fluorescent lamp to have uniform brightness distribution by controlling the amount of reflected light of total incident light.
  • the first and second electrode portions 130 and 140 are printed on a top surface of the reflecting plate 120 such that they are electrically insulated from each other.
  • the dielectric layer 150 electrically insulates the first and second electrode portions 130 and 140 and limits an electric current.
  • the fluorescent material 160 is applied to a top surface of the dielectric layer 150.
  • An inert gas is filled into a discharge chamber defined by the front plate 110, the rear plate 170 and the support 180. However, it is preferred that the inert gas do not contain mercury.
  • xenon (Xe) gas, argon (Ar) gas containing Xe gas, neon (Ne) gas, or krypton (Kr) gas may be filled thereinto.
  • Xe xenon
  • Ar argon
  • Xe gas Xe gas
  • Ne neon
  • Kr krypton
  • the fluorescent lamp preferably has a thickness of 3mm or greater. More preferably, the gap between the front and rear plates is in a range of 3 to 8mm.
  • each of the first and second electrode portions 130 and 140 in the present invention is formed of a pair of strip leads 131 or 141 to construct the same electrode structure, a plurality of protrusions P symmetrically protrude outward on the pair of strip leads 131 or 141, and the first and second electrode portions 130 and 140 are arranged alternately.
  • a plurality of first and second electrode portions 130 and 140 are connected to primary electrodes 132 and 142 provided outside of the discharge chamber, respectively.
  • the configurations of the primary electrodes in the present invention are not limited to specific configurations. It is preferred that the protrusions P be formed equidistantly on the strip leads 131 and 141. Meanwhile, the present invention is characterized in that an end of each of the strip leads 131 and 141 is positioned outside of an inner contact interface between the rear panel 170 and the support.
  • reference numeral 180a designates a region to which the support is fixed. It can be seen that the end of each of the strip leads 131 and 141 extends at least up to the region to which the support is fixed.
  • the ends of the strip leads are positioned outside of the discharge space, they do not affect the discharge generated within the discharge chamber. Thus, it is possible to obtain a stable discharge property. That is, the ends and intermediate portions of the strip leads are prevented from performing discharge in different discharge manners, so that the same brightness uniformity can be obtained between the center and edges of the fluorescent lamp.
  • the protrusions symmetrically formed on both sides of each strip lead take the shape of a needle. Referring to the partially enlarged view in Fig. 2, a tip PI of each protrusion P preferably has a predetermined radius of curvature.
  • the curved tip PI has a disadvantage in that the discharge starting voltage increases, there are advantages in that an effective area for discharge is enlarged, the concentration of an electric filed is reduced to widen a discharge path, a problem of heat generation due to instantaneous discharge can be solved, and the life of the lamp can be prolonged.
  • an intermediate portion P2 and a lower portion P3 of the protrusion are also formed to have predetermined radii of curvature, thereby preventing discharge from being generated at other portions except the tip PI of the protrusion. It is preferred that the radii of curvature of the curves defined in the protrusion be in a range of R0.1 to R0.8.
  • the spacing between most adjacent strip leads of the first and second electrode portions should be properly maintained. That is, if the spacing between adjacent strip leads of the first and second electrode portions is too small, it is possible to lower the discharge starting voltage. However, there is a disadvantage in that a discharge current rapidly increases, resulting in lowering of discharge efficiency. On the contrary, if the spacing between adjacent strip leads is large, the discharge starting voltage increases, resulting in the occurrence of a non-emitting area. Therefore, proper spacing between the electrodes is very important in determining brightness, efficiency, and the performance of an inverter.
  • the present invention is characterized in that the spacing dl between most adjacent strip leads 131 and 141 of the first and second electrode portions 130 and 140 is 2 to 10mm.
  • the spacing between a pair of strip leads constructing the same electrode be maintained to be minimum spacing. If the spacing between a pair of strip leads constructing the same electrode is large, a non-emitting area increases, resulting in deterioration of brightness uniformity.
  • the present invention is characterized in that the spacing d2 between a pair of strip leads constructing the same electrode is 1 to 7mm. Further, the present invention is characterized in that the width of each strip lead is
  • FIG. 3 is a view showing a preferred example of the spacers provided in flat fluorescent lamp according to the present invention.
  • Spacers 200 each of which comprises a hexahedron 210 and a sphere 220 can be added between the front and rear panels 110 and 170. It is preferred that a ratio of the sphere 220 to the hexahedron 210 be determined to minimize hindrance to uniformity and brightness.
  • FIG. 4 is a view showing another example of the flat fluorescent lamp according to the present invention, wherein the rear panel is further provided with a heat-dissipating member with superior thermal conductivity to facilitate heat dissipation.
  • the heat-dissipating member includes a heat-dissipating sheet or silicone that is mounted on a back surface of the rear panel 170 to facilitate rapid heat conduction.
  • a light-diffusing member is additionally mounted on a top surface of the front panel to compensate the influence of differences in brightness between micro discharge regions of different electrodes, thereby improving brightness and uniformity.
  • the light-diffusing member includes a diffusion sheet 410 or a prism sheet 420.
  • the present invention is characterized in that the flat fluorescent lamp is driven by a square wave pulse type AC power source. Since polarities of the AC power source are considered as performing the same function, the polarities of the first and second electrode portions are not separately discriminated from each other. Fig.
  • FIG. 5 a view showing a preferred example of a driving circuit for driving the flat fluorescent lamp according to the present invention, wherein a high-voltage square wave AC pulse is output by combining four high speed FETs with a transformer. That is, the square wave AC pulse can be obtained by inputting proper signals into gates of the respective FETs in a state where a DC voltage +V is applied to drains Ql and
  • Fig. 6a when Q3 and Q4 are simultaneously turned on, a voltage approximate to XV is produced at both ends of a primary side of the transformer.
  • Figs. 6 (a) and (b) show a waveform of an input gate signal of the driving circuit of Fig. 5, and a waveform of an output voltage, respectively. The output voltage produced on the primary side of the transformer is boosted and then applied through the first and second electrode portions.
  • the flat fluorescent lamp of the present invention has superior brightness uniformity, brightness and light-emitting efficiency. Further, it can also be seen that the life of the flat fluorescent lamp of the present invention is prolonged as compared with the conventional flat fluorescent lamp.
  • the flat fluorescent lamp of the present invention described above since each of two electrodes driven by an AC power source comprises a pair of strip leads to have the same electrode structure, there are advantages in that the number of discharge at the two electrodes can be increased as compared with conventional driving by a DC power source, and the brightness and uniformity are improved. Moreover, since needle-shaped protrusions with predetermined radii of curvature are formed on the strip leads of the respective electrodes, it is possible to beforehand determine discharge initiation and a discharge path. Therefore, stable discharge can be generated.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

La présente invention concerne une lampe fluorescente plane à décharge stable et à luminosité uniforme. La lampe fluorescente plane comprend un panneau avant (110) avec un matériau fluorescent (111) appliqué; un panneau arrière (170) comprenant une plaque réfléchissante (120), des première et deuxième parties d'électrodes (130 et 140) imprimées de manière à être isolées électriquement, une couche diélectrique (150) et un matériau fluorescent (160) ainsi qu'un support (180) destiné à soutenir les panneaux avant et arrière (110 et 170) et maintenir l'état étanche. Chacune des première et deuxième parties d'électrodes (130 et 140) est formée d'une paire de conducteurs en bande (131 et 141) de manière à constituer la même électrode, une pluralité de saillies P sont formés symétriquement pour passer à travers la paire de conducteurs en bande, et les première et deuxième parties d'électrodes sont disposées en alternance. Comme chacune des deux électrodes pilotées par une source d'alimentation c.a. comprend la paire de conducteurs en bande de manière à avoir la même structure d'électrode, il existe certains avantages en ce que le nombre de décharges sur les deux électrodes puisse être augmenté en comparaison au pilotage traditionnel par une source d'alimentation c.c., et la luminosité ainsi que l'uniformité s'en trouvent également améliorés.
PCT/KR2005/000513 2004-02-27 2005-02-26 Lampe fluorescent plane WO2005083745A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007500681A JP4606456B2 (ja) 2004-02-27 2005-02-26 平面蛍光ランプ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2004-0013321 2004-02-27
KR1020040013321A KR100650491B1 (ko) 2004-02-27 2004-02-27 평판형 형광램프

Publications (1)

Publication Number Publication Date
WO2005083745A1 true WO2005083745A1 (fr) 2005-09-09

Family

ID=34909969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/000513 WO2005083745A1 (fr) 2004-02-27 2005-02-26 Lampe fluorescent plane

Country Status (4)

Country Link
JP (1) JP4606456B2 (fr)
KR (1) KR100650491B1 (fr)
CN (1) CN1965387A (fr)
WO (1) WO2005083745A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100701247B1 (ko) * 2006-04-25 2007-03-29 미래산업 주식회사 평판형 형광램프
KR100781673B1 (ko) * 2006-04-25 2007-12-03 미래산업 주식회사 평판형 형광램프
KR100797065B1 (ko) * 2006-04-26 2008-01-22 미래산업 주식회사 평판형 형광램프
CN101114566B (zh) * 2007-08-31 2010-05-19 西安交通大学 一种平面荧光灯
CN101387787B (zh) * 2007-09-10 2010-06-02 北京京东方光电科技有限公司 液晶显示装置背光灯反射板和背光模组

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313017A1 (de) * 1993-04-21 1994-12-22 Kuemmerling Andreas Flächenförmige Kompakt-Leuchtstofflampe
JP2000182565A (ja) * 1998-12-21 2000-06-30 Nippon Sheet Glass Co Ltd 平板型蛍光灯とそれを用いた液晶表示装置及びその製造方法
US6246171B1 (en) * 1997-03-21 2001-06-12 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Gas discharge lamp with dielectrically impeded electrodes
JP2001283770A (ja) * 2000-03-31 2001-10-12 Sanyo Electric Co Ltd 平面発光型蛍光ランプ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU224147B1 (hu) * 1997-03-21 2005-05-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH. Lapos fénycső háttérvilágításhoz, valamint ilyen fénycsövet tartalmazó világítási rendszer és LCD kijelzős készülék
DE19711892A1 (de) * 1997-03-21 1998-09-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Flachstrahler
DE19817480B4 (de) * 1998-03-20 2004-03-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Flachstrahlerlampe für dielektrisch behinderte Entladungen mit Abstandshaltern
JP2002042738A (ja) * 2000-07-26 2002-02-08 Nec Kansai Ltd 平面型発光素子
DE10063930C1 (de) * 2000-12-20 2002-08-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Stille Entladungslampe mit steuerbarer Farbe und Bildanzeigeeinrichtung mit dieser stillen Entladungslampe sowie Verfahren zum Betreiben derselben
KR20030062797A (ko) * 2002-01-19 2003-07-28 삼성전자주식회사 수평 대향 방전형 평판램프

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313017A1 (de) * 1993-04-21 1994-12-22 Kuemmerling Andreas Flächenförmige Kompakt-Leuchtstofflampe
US6246171B1 (en) * 1997-03-21 2001-06-12 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Gas discharge lamp with dielectrically impeded electrodes
JP2000182565A (ja) * 1998-12-21 2000-06-30 Nippon Sheet Glass Co Ltd 平板型蛍光灯とそれを用いた液晶表示装置及びその製造方法
JP2001283770A (ja) * 2000-03-31 2001-10-12 Sanyo Electric Co Ltd 平面発光型蛍光ランプ

Also Published As

Publication number Publication date
KR100650491B1 (ko) 2006-11-27
JP4606456B2 (ja) 2011-01-05
KR20050087493A (ko) 2005-08-31
CN1965387A (zh) 2007-05-16
JP2007525806A (ja) 2007-09-06

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