WO2007032319A1 - 熱陰極型放電ランプ、ランプユニット、および表示装置 - Google Patents
熱陰極型放電ランプ、ランプユニット、および表示装置 Download PDFInfo
- Publication number
- WO2007032319A1 WO2007032319A1 PCT/JP2006/318002 JP2006318002W WO2007032319A1 WO 2007032319 A1 WO2007032319 A1 WO 2007032319A1 JP 2006318002 W JP2006318002 W JP 2006318002W WO 2007032319 A1 WO2007032319 A1 WO 2007032319A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lamp
- krypton
- discharge lamp
- cathode discharge
- partial pressure
- Prior art date
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
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
-
- 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
- H01J61/33—Special shape of cross-section, e.g. for producing cool spot
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133604—Direct backlight with lamps
Definitions
- the present invention relates to a hot cathode discharge lamp, a lamp unit including the hot cathode discharge lamp as a light source, and a display device.
- a cold cathode discharge lamp is mainly used as a light source of a backlight unit of a liquid crystal display. Since the cold cathode discharge lamp is suitable for small diameter lamps, it is suitable as a light source for a backlight unit that is required to be thin.
- Patent Document 1 Japanese Patent Laid-Open No. 56-73855
- the hot cathode discharge lamp has a problem that the lamp life is shorter than that of the cold cathode discharge lamp, and is unsuitable for use as a light source of the backlight unit.
- the present invention has been made in view of the above points, and an object thereof is to provide a hot cathode discharge lamp, a lamp unit, and a display device that have a long lifetime.
- the present inventor has intensively studied to extend the life of a hot cathode discharge lamp for a backlight unit.
- the inventors of the present invention have focused on the fact that the life is increased when the partial pressure ratio of krypton is increased as a rare gas for buffering.
- the lamp output decreases as the amount of krypton enclosed increases, so the krypton partial pressure ratio is about 15%. The limit was the degree.
- the present inventors have found that the problem that the lamp output decreases when the krypton partial pressure ratio is increased occurs when the hot cathode discharge lamp is lit in an ambient temperature. It has been found that there is no problem of a decrease in lamp output when it is placed in the light unit housing and lit in an atmosphere of about 50 ° C to 70 ° C.
- a hot cathode discharge lamp includes an envelope in which a rare gas is sealed, and is a hot cathode discharge lamp disposed in a housing.
- the rare gas contains krypton. It is characterized by containing 20% or more in pressure ratio.
- the hot cathode discharge lamp according to the present invention is used as a light source of a lamp unit having a housing, and since the atmosphere in which the lamp is disposed is higher than room temperature, krypton can be enclosed.
- the lamp output is high!
- the krypton partial pressure ratio is increased, the lamp voltage is lowered, so that the starting characteristics are improved and the discharge can be easily maintained.
- the partial pressure ratio of the krypton is preferably 60% or less. This is because it is difficult to dimm the lamp if the partial pressure ratio of krypton in the rare gas exceeds 60%.
- the partial pressure ratio of krypton in the rare gas is preferably 60% or less.
- the krypton partial pressure ratio in the rare gas is 60% or less. Preferably it is. This is because if the partial pressure ratio of krypton in the rare gas exceeds 60%, so-called moving stripes are generated when the lamp dimming is turned on.
- the partial pressure ratio of the krypton is more preferably 45% or more.
- the lamp voltage can be lowered and the lamp current can be increased, which is a force that can provide a very high efficiency lamp.
- the partial pressure ratio of the krypton is more preferably 55% or less.
- a lamp unit according to the present invention includes a housing and any one of the hot cathode discharge lamps disposed in the housing. As a result, a lamp unit with high efficiency and long life can be obtained.
- a display device includes the lamp unit as a light source. Thereby, a highly efficient and long-life display device with low power consumption can be obtained.
- Another display device includes a housing and any one of the above-described hot cathode discharge lamps disposed in the housing. As a result, a highly efficient and long-life display device with low power consumption can be obtained.
- FIG. 1 is a schematic perspective view showing a configuration of a liquid crystal display having an aspect ratio of 16: 9 according to the present embodiment.
- FIG. 2 is a schematic perspective view showing a configuration of a backlight unit for a liquid crystal display according to the present embodiment.
- FIG. 3 is a cross-sectional view showing a configuration of a hot cathode discharge lamp according to the present embodiment.
- FIG. 4 is a table showing the relationship between the partial pressure ratio of krypton in the buffer rare gas and the lamp life.
- Fig. 5 is a schematic diagram showing moving fringes generated when lamp dimming is turned on.
- FIG. 6 is a cross-sectional view showing a configuration of a hot cathode discharge lamp according to a modification.
- FIG. 7 is a table showing the relationship between the partial pressure ratio of krypton in the buffer rare gas of the hot cathode discharge lamp according to the modification and the lamp life.
- FIG. 1 is a diagram showing a liquid crystal display device according to the present invention, and a part of the liquid crystal display device is cut away so that the inside can be seen.
- the liquid crystal display device 1 is, for example, a liquid crystal color television, and a liquid crystal screen unit 3 and a backlight unit 5 are incorporated in a housing 4.
- the liquid crystal screen unit 3 includes, for example, a color filter substrate, a liquid crystal, a TFT substrate, a drive module and the like (not shown), and displays a color image based on an image signal from the outside of the liquid crystal screen unit 3. Displayed on screen 6 of 3.
- FIG. 2 is a schematic perspective view showing a configuration of the knocklight unit 5 for liquid crystal display having an aspect ratio of 16: 9 according to the present embodiment.
- a part of the front panel 16 is cut out to show the internal structure.
- the knock light unit 5 includes a plurality of hot-cathode discharge lamps 20, a casing 10 that has openings and accommodates these lamps 20, and an opening of the casing 10. And a front panel 16 covering the part.
- the casing 10 is made of, for example, polyethylene terephthalate (PET) resin, and a reflective surface is formed on the inner surface 11 by depositing a metal such as silver.
- PET polyethylene terephthalate
- the hot cathode discharge lamp 20 has a straight tube shape, and in the present embodiment, 14 lamps 20 are arranged in the casing 10 in a direct manner and are electrically connected in parallel. .
- the lamp 20 is constant-current controlled by a lighting circuit (not shown). The configuration of the hot cathode discharge lamp 20 will be described later.
- the opening of the housing 10 is formed by laminating a diffusion plate 13, a diffusion sheet 14, and a lens sheet 15. It is covered with a translucent front panel 16 and sealed to prevent foreign matter such as dust and dust from entering.
- the diffusion plate 13 and the diffusion sheet 14 in the front panel 16 scatter and diffuse the light emitted from the lamp 20, and the lens sheet 15 aligns the light in the normal direction of the sheet 15.
- the light emitted from the lamp 20 is irradiated uniformly forward on the entire surface (light emitting surface) of the front panel 16.
- FIG. 3 is a cross-sectional view showing a configuration of a hot cathode discharge lamp (hereinafter sometimes simply referred to as “lamp”) 20 according to the present embodiment.
- lamp a hot cathode discharge lamp
- the lamp 20 includes a straight tubular glass bulb (envelope) 22 and a pair of electrodes 30 a and 30 b disposed at both ends of the glass bulb 22.
- the glass bulb 22 is made of norlium strontium silicate glass (soft glass having a softening point of 675 ° C.).
- An exhaust pipe 28 is sealed to one end of the glass bulb 22 (the left end in the figure).
- the exhaust pipe 28 is used when exhausting the inside of the glass bulb 22 or enclosing a rare gas, and is sealed after exhausting and enclosing.
- the length Li of the portion of the exhaust pipe 28 protruding to the outside is 10 mm.
- the length Li is preferably 5 mm or more and 30 mm or less, more preferably 15 mm or more and 30 mm or less. If the thickness is less than 5 mm, sealing cutting becomes difficult. If it is 15 mm or more and 30 mm or less, the efficiency can be improved by controlling the coldest spot. If it exceeds 30 mm, it will become longer and will break easily, and there will be more parts that will not shine, resulting in a decline in product value. Moreover, even if the length exceeds 30 mm, no further improvement in efficiency can be expected.
- the electrodes 30a and 30b are of a so-called glass bead mount type, and are pinch-sealed (crushed and sealed) to the glass bulb 22. Also, the electrode coils 30a and 30b are triple-coil three-turn electrode coils 3 la and 3 lb, and a pair of lead wires 32a, 32b, 33a and 33b that support the electrode coils 3 la and 3 lb. Bee holding lead wires 32a, 32b, 33a, 33b Glass and 34a, 34b.
- the electrode coils 31a and 31b are made of, for example, tungsten, and are coated with oxides of strontium, calcium, and normo as an emitter.
- a protective film 24 having an alumina force is formed on the inner surface of the glass bulb 22.
- a phosphor layer 26 is laminated.
- the phosphor in the phosphor layer 26 is red (Y
- a mixture of rare earth phosphors is used.
- the glass bulb 22 contains about 5 mg of mercury 21, argon (Ar) at a pressure of 250 Pa at room temperature as a rare gas for buffering, and krypton (Kr) at a pressure of 250 Pa. That is, in the present embodiment, krypton is enclosed as a rare gas at a partial pressure ratio of 50%.
- the mercury 21 enclosed in the glass bulb 22 may be enclosed in the form of amalgam such as zinc mercury, tin mercury, bismuth, indium mercury, etc., in addition to mercury alone.
- amalgam such as zinc mercury, tin mercury, bismuth, indium mercury, etc.
- the specifications such as the dimensions of the lamp 20 when used in a backlight unit for a 45-inch liquid crystal display device are described.
- the glass bulb 22 has an outer diameter of 12. Omm, an inner diameter of 10. Omm, and a total length L of 1010 mm o
- the inter-electrode distance Le is 950 mm and the tube wall load We is 0.05 (WZcm 2 ).
- the tube wall load is a value obtained by dividing the lamp power by the inner surface area of the portion of the glass bulb 22 corresponding to the interelectrode distance Le.
- an argon / krypton mixed gas (Ar50% + Kr50%) having a pressure of 500 Pa at room temperature is enclosed as a rare gas for buffering. Details of the buffer rare gas will be described later.
- the tube wall load We of the lamp 20 is preferably specified in the range of 0.025-0.07 (WZcm 2 ).
- the inventor has long used a hot cathode discharge lamp used as a light source of a backlight unit. We have earnestly studied to make it last.
- the inventor of the present invention has noticed that the lamp life becomes longer when the partial pressure ratio of krypton is increased as a rare gas for buffering. Increasing the partial pressure ratio of krypton increases the lamp life because it is applied to the electrode coil by using a larger atomic weight than argon and increasing the partial pressure ratio of krypton. It is also a force that makes the emitters difficult to scatter the electrode coil force.
- Fig. 4 is a table showing the relationship between the partial pressure ratio of krypton as a buffer rare gas and the lamp life.
- “ ⁇ ” in the column of “moving fringe at 30% dimming” in FIG. 4 indicates a state where a moving stripe is generated
- “X” indicates a state where a moving stripe is generated.
- “ ⁇ ” in the column of “light flux rise characteristic” indicates a good state
- “ ⁇ ” indicates a possible state
- X” indicates a defective state.
- CTR cathode ray tube
- the lamp 20 has a constant rated power (for example, 20W), and the lamp voltage decreases and the lamp current increases as the krypton voltage division ratio increases.
- the electrodes are used to emit electrons from the emitter applied to the electrode coil 3 la, 3 lb.
- the force required to raise the temperature of the coils 31a and 31b The lamp coil current alone cannot sufficiently raise the temperature of the electrode coils 31a and 3 lb. Therefore, conventionally, the filament current is separately supplied to the electrode coils 31a and 31b, and the temperature of the electrode coils 31a and 31b is increased by the heat generated by the supply of the filament current.
- the present inventor can reduce the lamp voltage and increase the lamp current by increasing the krypton partial pressure ratio. It was found that loss can be suppressed.
- the partial pressure ratio of krypton is preferably 60% or less. It can be said that there is. Note that dimming is difficult when the partial pressure ratio of krypton exceeds 60%, but the life becomes longer as the partial pressure ratio of krypton increases, so the demand for longer life and better dimming characteristics is required. It is desirable to determine the partial pressure ratio of krypton by comparing the above.
- the partial pressure ratio of tarlipton in the rare gas is preferably 60% or less. The rise characteristics of the light flux in Fig. 4 were confirmed visually.
- the krypton partial pressure ratio in the rare gas is 60%. It is preferable that:
- FIG. 5 is a schematic diagram showing the moving fringes generated when the lamp dimming is turned on, and is a diagram for explaining the moving fringes described above.
- a moving stripe is a part of the lamp 20 or a bright part of the lamp 20 when the lamp 20 is turned on. Dark parts appear alternately and become a striped pattern, which is the phenomenon that the lamp 20 moves toward one of the tube ends. In the example shown in Fig. 5, the stripe pattern moves from the right side of the paper to the left and turns.
- the cause of the movement fringes has not been clarified at this stage, but it has been confirmed that the movement fringes occur when the light is adjusted or the partial pressure ratio of the tripton is increased.
- the inventors' diligent research has revealed that the generation of moving fringes becomes significant when the krypton partial pressure ratio exceeds 60%.
- the rare gas enclosed in the glass bulb 22 contains krypton at a mixing ratio of 45% or more. This is because the lamp voltage can be reduced and the lamp current can be increased, so that a very efficient lamp can be obtained.
- the present invention can provide a hot cathode fluorescent lamp, a lamp unit, and a liquid crystal display device with high efficiency and long life.
- FIG. 6 is a diagram of a hot cathode discharge lamp according to a modification, in which FIG. 6 (a) is a sectional view parallel to the tube axis, and FIG. 6 (b) is a sectional view perpendicular to the tube axis. is there.
- the number of turns of the electrode coils 51a and 51b is increased by arranging the electrode coils 51a and 51b so that the glass bulb 42 has a flat cross section and the axis is oriented in the major axis direction of the flat shape. be able to.
- the length of the electrode coils 5 la and 51b in the direction orthogonal to the tube axis is L
- the length of the long inner diameter of the glass valve 42 is Ll
- the length of the short inner diameter is L2
- L2 ⁇ It is preferable to satisfy the relationship of L ⁇ L1. This makes it possible to obtain a hot cathode discharge lamp having a long life with respect to the thickness of the glass nozzle (thickness in the short inner diameter direction).
- FIG. 7 is a table showing the relationship between the partial pressure ratio of krypton in the buffer rare gas of the hot cathode discharge lamp according to the modification and the lamp life.
- the partial pressure ratio of krypton is preferably 20% or more and 60% or less. In particular, it is desirable to be 45% or more and 55% or less.
- the glass bulb is not limited to the force described with respect to the linear shape in appearance.
- the glass bulb has other shapes such as a U-shape and a U-shape in appearance. It may be.
- the protective film is formed.
- the protective film may not be formed.
- the knock light unit has been described as an example of the lamp unit.
- the present invention is not limited to this.
- the case and the hot cathode discharge lamp according to the present embodiment A general lighting unit may be provided.
- the liquid crystal display device has been described as an example of the display device.
- the display device is not limited thereto, and the display device may be, for example, a signboard using the hot cathode discharge lamp of the present embodiment as a light source. Even so.
- the present invention can be widely applied to hot cathode fluorescent lamps and backlight units. Moreover, since the present invention can provide a long-life hot cathode fluorescent lamp, its industrial utility value is extremely high.
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007535466A JPWO2007032319A1 (ja) | 2005-09-13 | 2006-09-11 | 熱陰極型放電ランプ、ランプユニット、および表示装置 |
US12/065,262 US20090160342A1 (en) | 2005-09-13 | 2006-09-11 | Hot cathode discharge lamp, lamp unit and display apparatus |
EP06797809A EP1926124A1 (en) | 2005-09-13 | 2006-09-11 | Hot cathode discharge lamp, lamp unit and display apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005265792 | 2005-09-13 | ||
JP2005-265792 | 2005-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007032319A1 true WO2007032319A1 (ja) | 2007-03-22 |
Family
ID=37864912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/318002 WO2007032319A1 (ja) | 2005-09-13 | 2006-09-11 | 熱陰極型放電ランプ、ランプユニット、および表示装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090160342A1 (ja) |
EP (1) | EP1926124A1 (ja) |
JP (1) | JPWO2007032319A1 (ja) |
KR (1) | KR20080044265A (ja) |
CN (1) | CN101263579A (ja) |
TW (1) | TW200721233A (ja) |
WO (1) | WO2007032319A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009090881A1 (ja) * | 2008-01-18 | 2009-07-23 | Panasonic Corporation | バックライト及び照明装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011065769A (ja) * | 2009-09-15 | 2011-03-31 | Hitachi Consumer Electronics Co Ltd | バックライトおよび液晶表示装置 |
US8299697B2 (en) * | 2010-10-15 | 2012-10-30 | Qin Kong | High performance fluorescent lamp |
US8629608B2 (en) * | 2011-12-02 | 2014-01-14 | General Electric Company | Fluorescent lamp of improved lumen maintenance and mercury consumption |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5380779A (en) * | 1976-12-24 | 1978-07-17 | Toshiba Corp | Fluorescent lamp |
JPS5380780A (en) * | 1976-12-24 | 1978-07-17 | Toshiba Corp | Fluorescent lamp |
JPS53103672A (en) * | 1977-02-21 | 1978-09-09 | Toshiba Corp | High output fluorescent lamp |
JPS567345A (en) * | 1979-07-02 | 1981-01-26 | Mitsubishi Electric Corp | Rapid start type 110w fluorescent lamp |
JPS5648059A (en) * | 1979-09-26 | 1981-05-01 | Mitsubishi Electric Corp | Circular fluorescent lamp |
JPS5673855A (en) | 1979-11-20 | 1981-06-18 | Toshiba Corp | Fluorescent lamp |
JPS60130046A (ja) * | 1983-12-16 | 1985-07-11 | Stanley Electric Co Ltd | 螢光ランプ |
JPS60236450A (ja) * | 1985-04-19 | 1985-11-25 | Hitachi Ltd | けい光ランプ |
-
2006
- 2006-09-11 US US12/065,262 patent/US20090160342A1/en not_active Abandoned
- 2006-09-11 CN CNA2006800336849A patent/CN101263579A/zh active Pending
- 2006-09-11 EP EP06797809A patent/EP1926124A1/en not_active Withdrawn
- 2006-09-11 KR KR1020087005539A patent/KR20080044265A/ko not_active Application Discontinuation
- 2006-09-11 JP JP2007535466A patent/JPWO2007032319A1/ja not_active Withdrawn
- 2006-09-11 WO PCT/JP2006/318002 patent/WO2007032319A1/ja active Application Filing
- 2006-09-12 TW TW095133648A patent/TW200721233A/zh unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5380779A (en) * | 1976-12-24 | 1978-07-17 | Toshiba Corp | Fluorescent lamp |
JPS5380780A (en) * | 1976-12-24 | 1978-07-17 | Toshiba Corp | Fluorescent lamp |
JPS53103672A (en) * | 1977-02-21 | 1978-09-09 | Toshiba Corp | High output fluorescent lamp |
JPS567345A (en) * | 1979-07-02 | 1981-01-26 | Mitsubishi Electric Corp | Rapid start type 110w fluorescent lamp |
JPS5648059A (en) * | 1979-09-26 | 1981-05-01 | Mitsubishi Electric Corp | Circular fluorescent lamp |
JPS5673855A (en) | 1979-11-20 | 1981-06-18 | Toshiba Corp | Fluorescent lamp |
JPS60130046A (ja) * | 1983-12-16 | 1985-07-11 | Stanley Electric Co Ltd | 螢光ランプ |
JPS60236450A (ja) * | 1985-04-19 | 1985-11-25 | Hitachi Ltd | けい光ランプ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009090881A1 (ja) * | 2008-01-18 | 2009-07-23 | Panasonic Corporation | バックライト及び照明装置 |
Also Published As
Publication number | Publication date |
---|---|
TW200721233A (en) | 2007-06-01 |
JPWO2007032319A1 (ja) | 2009-03-19 |
KR20080044265A (ko) | 2008-05-20 |
EP1926124A1 (en) | 2008-05-28 |
CN101263579A (zh) | 2008-09-10 |
US20090160342A1 (en) | 2009-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20060030232A1 (en) | Arc tube, discharge lamp, and production method of such arc tube, which enables brighter illuminance | |
WO2007032319A1 (ja) | 熱陰極型放電ランプ、ランプユニット、および表示装置 | |
JP2008262818A (ja) | 熱陰極蛍光ランプを備えたバックライト | |
JP3981362B2 (ja) | 冷陰極型蛍光ランプ及びバックライトユニット | |
JPWO2007032320A1 (ja) | 熱陰極型放電ランプ、ランプユニット、および表示装置 | |
JPH05190152A (ja) | 表示用蛍光ランプ | |
JP2008292581A (ja) | 直下型液晶ディスプレイ用バックライト | |
JP2003007252A (ja) | 冷陰極蛍光ランプ及び照明装置 | |
JP3914217B2 (ja) | 冷陰極蛍光ランプおよびバックライトユニット | |
JP2008171710A (ja) | バックライト装置 | |
JP2008066164A (ja) | 照明装置、液晶表示装置、蛍光ランプの再生方法および加熱装置 | |
JP2008108493A (ja) | 低圧放電ランプ、バックライトユニットおよび液晶表示装置 | |
JP2003187750A (ja) | 蛍光ランプおよび照明装置 | |
JP2008270071A (ja) | 直下型液晶ディスプレイ用バックライト | |
JPH08273591A (ja) | 冷陰極放電灯およびこの点灯装置およびこれを用いた照明装置ならびにバックライト、液晶表示装置 | |
KR101008907B1 (ko) | 고효율 형광 램프 | |
JPH11219685A (ja) | 2重管形蛍光ランプ | |
JP2008262821A (ja) | 熱陰極蛍光ランプを備えたバックライト | |
JP2002289144A (ja) | 2重管形放電ランプ | |
JP2004146385A (ja) | 蛍光ランプおよび照明器具 | |
JPH10199476A (ja) | 冷陰極放電ランプおよび照明装置 | |
JP2005228559A (ja) | 蛍光ランプ及び照明装置 | |
JP2005183218A (ja) | 冷陰極蛍光ランプおよびそれを用いたバックライトユニット | |
JPWO2008139711A1 (ja) | 長寿命熱陰極蛍光ランプ、当該熱陰極蛍光ランプを備えたバックライト又は照明装置及びその始動方法 | |
JP2009129582A (ja) | バックライト |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680033684.9 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref document number: 2007535466 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006797809 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087005539 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12065262 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |