WO2005104166A1 - Flat type fluorescent lamp and the manufacturing method thereof - Google Patents

Flat type fluorescent lamp and the manufacturing method thereof Download PDF

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Publication number
WO2005104166A1
WO2005104166A1 PCT/KR2004/000957 KR2004000957W WO2005104166A1 WO 2005104166 A1 WO2005104166 A1 WO 2005104166A1 KR 2004000957 W KR2004000957 W KR 2004000957W WO 2005104166 A1 WO2005104166 A1 WO 2005104166A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp body
phosphor layer
light emission
flat type
type fluorescent
Prior art date
Application number
PCT/KR2004/000957
Other languages
French (fr)
Inventor
Kye-Seung Lee
Original Assignee
Kye-Seung Lee
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 Kye-Seung Lee filed Critical Kye-Seung Lee
Priority to PCT/KR2004/000957 priority Critical patent/WO2005104166A1/en
Publication of WO2005104166A1 publication Critical patent/WO2005104166A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • 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

Definitions

  • the present invention relates to a flat type fluorescent lamp and a
  • phosphor layer is separately applied on an outer surface of a lamp body.
  • a typical flat type fluorescent lamp includes two flat glass substrates, a
  • a phosphor layer is deposited on an inner surface
  • FIG. 1 is an exploded perspective view of a flat type fluorescent lamp
  • FIG. 2 is a sectional view of a flat type fluorescent lamp according to an
  • FIG. 3 is a sectional view of a flat type fluorescent lamp according to
  • FIG. 4 is a sectional view illustrating an example where an ultraviolet ray
  • FIG. 5 is a sectional view of a flat type fluorescent lamp according to
  • a typical flat type fluorescent lamp can realize the planar light source by
  • the brightness and the uniformity of the light emission can be any color
  • the phosphor layer cannot be uniformly formed.
  • the spacers cause the non-emission region.
  • the phosphor layer may
  • the present invention provides a flat type
  • fluorescent lamp comprising an ultraviolet ray generation part formed in a lamp
  • the light emission part may include a phosphor layer applied on an outer
  • the light emission part may further include a
  • the light emission part may be formed of a separated single unit comprising a transparent
  • the lamp body may be formed of a plurality of cylindrical tubes or a single
  • the lamp body through a precipitation, printing or spraying process; and forming a
  • the phosphor layer is formed on
  • the light emission part can
  • FIGS. 1 and 2 show a flat type fluorescent lamp according to a first
  • the inventive flat type fluorescent lamp is for
  • planar light source such as a backlight of a flat display device or lighting
  • the lamp body 1 includes transparent front and rear substrates 3 and 5 and
  • a side seal member 7 attaching the front and rear substrates 3 and 5 to each other.
  • Spacers 9 are disposed between the front and rear substrates 3 and 5 to
  • the spacers 17 may be formed of a tube
  • the discharge electrodes 11 are installed.
  • the discharge electrodes 11 are formed of a cold
  • the ultraviolet ray generation part 13 of the present invention is formed without forming the phosphor layer on the inner surface of the lamp body 1. Therefore, a light emission part 15 including a phosphor layer formed on an
  • the light emission part 15 is excited by the
  • the light emission part 15 of the present invention is formed by
  • a transparent protective layer 19 is applied on the phosphor layer
  • the phosphor layer 17 is formed on the outer surface of the front
  • the front substrate 3 constituting the lamp body 1 is
  • ultraviolet ray irradiated from the ultraviolet ray generation part 13 can be
  • the lamp body 1 of the present invention may be formed of a plurality of
  • cylindrical tube type lamp body 1 is illustrated in FIG. 3.
  • the lamp body 1 is formed by adjacently arranging and bonding a plurality
  • the ultraviolet ray generation part 13 is formed in each cylindrical tube 1a.
  • the light emission part 15 is formed on an outer surface of
  • the lamp body 1 may be formed of a plurality of cylindrical tubes or the
  • the discharge gas is injected in the lamp
  • the phosphor layer is not damaged. After the above, phosphors are applied on the outer surface of the front
  • application of the phosphors is performed by a precipitation, printing or spraying
  • the transparent protective layer 19 is applied on the phosphor layer
  • FIGS. 4 and 5 show a flat type fluorescent lamp according to a second
  • the lamp body 1 is identical to that of the first
  • the light emission part of this embodiment is formed in a single unit
  • the light emission part 15 includes a phosphor layer 17 formed by
  • the phosphor layer can be uniformly formed.
  • the light since the light
  • emission part 15 is separated from the lamp body, there is no need to go through
  • the transparent protective layer 19 functions to protect the
  • the lamp body 1 may be formed of a plurality of cylindrical tubes
  • the cylindrical tube type lamp body is a single rectangular parallelepiped body.
  • the lamp body 1 is illustrated in FIG. 5.
  • the lamp body 1 is formed by adjacently arranging and bonding a plurality
  • the ultraviolet ray generation part 13 is formed in each
  • the light emission part 15 that is separately prepared is
  • the lamp body 1 may be formed of a plurality of cylindrical tubes or the
  • the discharge gas is injected in the lamp
  • the phosphor layer 17 is formed by applying phosphors on
  • the application of the phosphors is performed by a precipitation
  • the transparent protective layer 19 is applied on the phosphor layer
  • the light emission part 15 is assembled on the lamp body 1 , thereby

Abstract

The present invention relates to a flat type fluorescent lamp that enhances light emission efficiency and a uniform brightness by separating an ultraviolet ray generation part from a light emission part in which a phosphor layer is separately applied on an outer surface of a lamp body, thereby realizing a planar light source. A flat type fluorescent lamp includes an ultraviolet ray generation part formed in a lamp body including a discharge electrode and a light emission part installed on an outer surface of the lamp body to emit fluorescent light by the ultraviolet ray irradiated from the ultraviolet ray generation part. The light emission part is formed on an outer surface of the lamp body. In addition, the light emission part is formed in a single unit separated from the lamp body and is then assembled with the lamp body.

Description

FLAT TYPE FLUORESCENT LAMP AND THE MANUFACTURING METHOD THEREOF
FIELD OF THE INVENTION
The present invention relates to a flat type fluorescent lamp and a
manufacturing method thereof, and more particularly, to a flat type fluorescent
lamp that enhances light emission efficiency and a uniform brightness by
separating an ultraviolet ray generation part from a light emission part in which a
phosphor layer is separately applied on an outer surface of a lamp body.
BACKGROUND OF THE INVENTION A flat type fluorescent lamp has been widely used as a backlight of a flat
display device or lighting device, being increasingly applied to a variety of
applications.
A typical flat type fluorescent lamp includes two flat glass substrates, a
sidewall coupling the glass substrates to each other, and a plurality of spacers
disposed between the glass substrates to uniformly maintain a gap between them
and define a discharge path. A phosphor layer is deposited on an inner surface
of a lamp body and discharge electrodes are formed on both ends of the sidewalls.
Inner air is exhausted through an exhaust tube formed on the sidewall of the lamp
body, after which the exhaust tube is sealed. When voltage is applied to the discharge electrodes formed on the both
ends of the fluorescent lamp, discharge is realized on the discharge path, thereby
exciting the phosphor layer to function as a planar light source.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a flat type fluorescent lamp
according to an embodiment of the present invention;
FIG. 2 is a sectional view of a flat type fluorescent lamp according to an
embodiment of the present invention; FIG. 3 is a sectional view of a flat type fluorescent lamp according to
another embodiment of the present invention;
FIG. 4 is a sectional view illustrating an example where an ultraviolet ray
generation part is separated from a light emission part in a flat type fluorescent
lamp according to the present invention; and FIG. 5 is a sectional view of a flat type fluorescent lamp according to
another embodiment of the present invention.
TECHNICAL PROBLEMS
A typical flat type fluorescent lamp can realize the planar light source by
forming the ultraviolet ray generation part together with the light emission part in a
lamp body. However, it has problems in that the uniform brightness cannot be
realized throughout the overall surface and the service life is short.
That is, the brightness and the uniformity of the light emission can be
improved by uniformly forming the phosphor layer on the inner surface of the lamp body. However, since the inner structure of the lamp body including the spacers
is too complicated to easily apply the phosphor layer, the phosphor layer cannot be uniformly formed. In addition, the spacers cause the non-emission region.
Furthermore, in the typical flat type fluorescent lamp, mercury is infiltrated
into the phosphor layer formed on the inner surface of the lamp body, thereby
increasing the consumption amount of the mercury. Furthermore, during the
sealing process of the lamp body at a high temperature, the phosphor layer may
be deteriorated, thereby reducing the service life of the products.
SUMMARY OF THE INVENTION
Therefore, the present invention has been made in an effort to solve the
above-described problems. It is an objective of the present invention to provide a
flat type fluorescent lamp that eliminates the non-emission region, and prevents
the consumption of the mercury to prevent the phosphor layer from being
damaged by separating an ultraviolet ray generation part from a light emission part
by separately applying a phosphor layer on an outer surface of a lamp body,
To achieve the above objective, the present invention provides a flat type
fluorescent lamp comprising an ultraviolet ray generation part formed in a lamp
body including a discharge electrode; and a light emission part installed on an
outer surface of the lamp body to emit fluorescent light by the ultraviolet ray
irradiated from the ultraviolet ray generation part.
The light emission part may include a phosphor layer applied on an outer
surface of the lamp body. The light emission part may further include a
transparent protective layer formed on the phosphor layer. Alternatively, the light emission part may be formed of a separated single unit comprising a transparent
substrate, a phosphor layer formed on the transparent substrate and a transparent
protective layer formed on the phosphor layer.
The lamp body may be formed of a plurality of cylindrical tubes or a single
rectangular parallelepiped tube.
According to another aspect of the present invention, there is provided a
method of manufacturing a flat type fluorescent lamp, the method comprising the
steps of injecting discharge gas in the lamp body and embedding an discharge
electrode; forming a phosphor layer by applying phosphors on an outer surface of
the lamp body through a precipitation, printing or spraying process; and forming a
transparent protective layer on the phosphor layer.
According to still another aspect of the present invention, there is provided
a method of manufacturing a flat type fluorescent lamp, the method comprising the
steps of injecting discharge gas in the lamp body and embedding an discharge
electrode; preparing a separated light emission unit comprising a transparent
substrate, a phosphor layer formed on an outer surface of the transparent
substrate and a transparent protective layer formed on the phosphor layer; and
assembling the separated light emission unit on the lamp body.
INDUSTRIAL APPLICABILITY
According to the present invention, since the phosphor layer is formed on
the outer surface of the ultraviolet ray generation part, the light emission part can
be separately formed or prepared, thereby improving the uniformity of the
phosphor layer and easing the manufacturing process. In addition, the quality and life service of the product can be improved. Furthermore, the productivity
can be improved and the required number of the diffusing plates and optical
sheets can be reduced, thereby saving the manufacturing costs.
In addition, by applying the light emission part between the transparent
substrate and the transparent protective layer, the damage of the phosphor layer
can be prevented.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Preferred embodiments of the present invention will be described in more
detail hereinafter in conjunction with the accompanying drawings.
FIGS. 1 and 2 show a flat type fluorescent lamp according to a first
embodiment of the present invention.
As shown in the drawings, the inventive flat type fluorescent lamp is for
realizing a planar light source such as a backlight of a flat display device or lighting
device, having a rectangular parallelepiped lamp body 1.
The lamp body 1 includes transparent front and rear substrates 3 and 5 and
a side seal member 7 attaching the front and rear substrates 3 and 5 to each other.
Spacers 9 are disposed between the front and rear substrates 3 and 5 to
uniformly maintain a gap between the front and rear substrates 3 and 5 and define
a discharge path in the lamp body 1. The spacers 17 may be formed of a tube
shape as shown in the drawings or a rectangular bar.
On opposite ends of the discharge path defined by the spacers 9, discharge
electrodes 11 are installed. The discharge electrodes 11 are formed of a cold
cathode or a thermal cathode and integrally supported on the side seal member 7. The above-described lamp body 1 is sealed by molten bonding and
discharge gas is injected in the lamp body 1 to form an ultraviolet ray generation
part 13. The ultraviolet ray generation part 13 of the present invention is formed without forming the phosphor layer on the inner surface of the lamp body 1. Therefore, a light emission part 15 including a phosphor layer formed on an
outer surface of the lamp body 1. The light emission part 15 is excited by the
ultraviolet ray irradiated from the ultraviolet ray generation part 13.
That is, the light emission part 15 of the present invention is formed by
applying the phosphor layer 17 on the outer surface of the front substrate 3 of the
lamp body 1. A transparent protective layer 19 is applied on the phosphor layer
17.
Here, the phosphor layer 17 is formed on the outer surface of the front
substrate 3 after the lamp body 1 is sealed through the molten bonding.
Therefore, it becomes possible to form a uniform layer thickness, thereby
preventing the phosphor layer from being damaged. In this embodiment, the front substrate 3 constituting the lamp body 1 is
preferably formed of ultraviolet ray-transmitting material such as quartz so that the
ultraviolet ray irradiated from the ultraviolet ray generation part 13 can be
effectively transmitted. The lamp body 1 of the present invention may be formed of a plurality of
cylindrical tubes as well as a single rectangular parallelepiped body. The
cylindrical tube type lamp body 1 is illustrated in FIG. 3.
The lamp body 1 is formed by adjacently arranging and bonding a plurality
of cylindrical tubes 1a. The ultraviolet ray generation part 13 is formed in each cylindrical tube 1a. The light emission part 15 is formed on an outer surface of
each cylindrical tube 1a.
A method for forming the inventive fluorescent lamp of the present invention
will be described hereinafter. The lamp body 1 may be formed of a plurality of cylindrical tubes or the
single rectangular parallelepiped body. The discharge gas is injected in the lamp
body 1 and the discharge electrodes 11 are buried, thereby forming the ultraviolet
ray generation part 13 without the phosphor layer. Therefore, during the molten
bonding process of the lamp body 1 , the phosphor layer is not damaged. After the above, phosphors are applied on the outer surface of the front
substrate 3 of the lamp body 1 , thereby forming the phosphor layer 17. The
application of the phosphors is performed by a precipitation, printing or spraying
process.
Next, the transparent protective layer 19 is applied on the phosphor layer
17, thereby completing the manufacture of the flat type fluorescent lamp.
FIGS. 4 and 5 show a flat type fluorescent lamp according to a second
embodiment of the present invention.
As shown in the drawings, the lamp body 1 is identical to that of the first
embodiment except for the structure of the light emission part. The light emission part of this embodiment is formed in a single unit
separated from the lamp body 1 and is then assembled with the lamp body 1. To
this end, the light emission part 15 includes a phosphor layer 17 formed by
applying phosphors on a transparent substrate 21 and a transparent protective
layer 19 installed on the phosphor layer 17. Since the phosphor layer 17 is formed on a separated transparent substrate
21 , the phosphor layer can be uniformly formed. In addition, since the light
emission part 15 is separated from the lamp body, there is no need to go through
the high temperature process, thereby preventing the phosphor layer from being
damaged. In addition, the transparent protective layer 19 functions to protect the
phosphor layer 17. Preferably, the lamp body 1 may be formed of a plurality of cylindrical tubes
or a single rectangular parallelepiped body. The cylindrical tube type lamp body
1 is illustrated in FIG. 5. The lamp body 1 is formed by adjacently arranging and bonding a plurality
of cylindrical tubes 1a. The ultraviolet ray generation part 13 is formed in each
cylindrical tube 1a. The light emission part 15 that is separately prepared is
assembled with the lamp body 1. A method for forming the inventive fluorescent lamp of the present invention
will be described hereinafter.
The lamp body 1 may be formed of a plurality of cylindrical tubes or the
single rectangular parallelepiped body. The discharge gas is injected in the lamp
body 1 and the discharge electrodes 11 are buried, thereby forming the ultraviolet
ray generation part 13 without the phosphor layer. After the above, the phosphor layer 17 is formed by applying phosphors on
the outer surface of the transparent substrate 21 that is separately prepared from
the lamp body 1. The application of the phosphors is performed by a precipitation,
printing or spraying process. Next, the transparent protective layer 19 is applied on the phosphor layer
17. Then, the light emission part 15 is assembled on the lamp body 1 , thereby
completing the manufacture of the flat type fluorescent lamp.

Claims

WHAT IS CLAIMED IS:
1. A flat type fluorescent lamp comprising: an ultraviolet ray generation part formed in a lamp body including a
discharge electrode; and a light emission part installed on an outer surface of the lamp body to emit
fluorescent light by the ultraviolet ray irradiated from the ultraviolet ray generation
part.
2. The flat type fluorescent lamp of claim 1 , wherein the light emission
part comprises a phosphor layer applied on an outer surface of the lamp body.
3. The flat type fluorescent lamp of claim 2, the light emission part
further comprises a transparent protective layer formed on the phosphor layer.
4. The flat type fluorescent lamp of claim 1 , wherein the light emission
part is formed of a separated single unit comprising a transparent substrate, a
phosphor layer formed on the transparent substrate and a transparent protective
layer formed on the phosphor layer.
5. The flat type fluorescent lamp of claim 1 , wherein the lamp body is
formed of a plurality of cylindrical tubes or a single rectangular parallelepiped
body.
6. A method of manufacturing a flat type fluorescent lamp, the method
comprising the steps of: injecting discharge gas in the lamp body and embedding an discharge
electrode; forming a phosphor layer by applying phosphors on an outer surface of the
lamp body through a precipitation, printing or spraying process; and forming a transparent protective layer on the phosphor layer.
7. A method of manufacturing a flat type fluorescent lamp, the method
comprising the steps of: injecting discharge gas in the lamp body and embedding an discharge
electrode; preparing a separated light emission unit comprising a transparent
substrate, a phosphor layer formed on the transparent substrate and a transparent
protective layer formed on the phosphor layer; and assembling the separated light emission unit on the lamp body.
PCT/KR2004/000957 2004-04-26 2004-04-26 Flat type fluorescent lamp and the manufacturing method thereof WO2005104166A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2004/000957 WO2005104166A1 (en) 2004-04-26 2004-04-26 Flat type fluorescent lamp and the manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2004/000957 WO2005104166A1 (en) 2004-04-26 2004-04-26 Flat type fluorescent lamp and the manufacturing method thereof

Publications (1)

Publication Number Publication Date
WO2005104166A1 true WO2005104166A1 (en) 2005-11-03

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Family Applications (1)

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PCT/KR2004/000957 WO2005104166A1 (en) 2004-04-26 2004-04-26 Flat type fluorescent lamp and the manufacturing method thereof

Country Status (1)

Country Link
WO (1) WO2005104166A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006048934A1 (en) * 2006-10-17 2008-05-08 Schott Ag System, useful e.g. for backlighting of displays and/or screens, and in LCD, computer monitors, phone screens, comprises an illuminating means with a glass envelope having an interior wall and a fluorescent layer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479069A (en) * 1994-02-18 1995-12-26 Winsor Corporation Planar fluorescent lamp with metal body and serpentine channel
JPH0822805A (en) * 1994-07-07 1996-01-23 Stanley Electric Co Ltd Planar fluorescent lamp
JPH1167151A (en) * 1997-08-18 1999-03-09 Hitachi Ltd Recycled fluorescent lamp
US6590319B2 (en) * 2001-05-08 2003-07-08 Lg. Philips Lcd Co., Ltd. Flat fluorescent discharge lamp
KR20040035482A (en) * 2002-10-22 2004-04-29 이계승 Flat type fluorescent lamp and the manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479069A (en) * 1994-02-18 1995-12-26 Winsor Corporation Planar fluorescent lamp with metal body and serpentine channel
JPH0822805A (en) * 1994-07-07 1996-01-23 Stanley Electric Co Ltd Planar fluorescent lamp
JPH1167151A (en) * 1997-08-18 1999-03-09 Hitachi Ltd Recycled fluorescent lamp
US6590319B2 (en) * 2001-05-08 2003-07-08 Lg. Philips Lcd Co., Ltd. Flat fluorescent discharge lamp
KR20040035482A (en) * 2002-10-22 2004-04-29 이계승 Flat type fluorescent lamp and the manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006048934A1 (en) * 2006-10-17 2008-05-08 Schott Ag System, useful e.g. for backlighting of displays and/or screens, and in LCD, computer monitors, phone screens, comprises an illuminating means with a glass envelope having an interior wall and a fluorescent layer

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