CN101303959A - Fluorescent lamp - Google Patents
Fluorescent lamp Download PDFInfo
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- CN101303959A CN101303959A CNA2008100887946A CN200810088794A CN101303959A CN 101303959 A CN101303959 A CN 101303959A CN A2008100887946 A CNA2008100887946 A CN A2008100887946A CN 200810088794 A CN200810088794 A CN 200810088794A CN 101303959 A CN101303959 A CN 101303959A
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- Prior art keywords
- low
- protective layer
- fluorescent lamp
- refraction
- glass tube
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
- H01J61/44—Devices characterised by the luminescent material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/57—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing manganese or rhenium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7743—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing terbium
-
- 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
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
A fluorescent lamp comprises a glass tube bulb, a low-index protective layer formed by a substance with a refractive index lower than glass on the inner surface of the glass tube bulb, a fluorescent layer formed on the low-index protective layer, a discharge gas contained in the glass tube bulb and an electrode enabling the discharge gas to discharge. The fluorescent layer also includes a low-index substance. The fluorescent layer also can have a refractive index lower than the low-index protective layer. A high-index protective layer with a refractive index higher than the low-index protective layer can be provided between the low-index protective layer and the fluorescent layer.
Description
Technical field
The present invention relates to be suitable for for example domestic lighting or liquid crystal indicator fluorescent lamp backlight.
Background technology
Decay along with the disappearance of time by the light intensity that fluorescent lamp produces.This is because the glass material of the mercury that contains and glass bulb chemical reaction each other in the glass bulb causes transparent glass bulb variable color.In order to suppress this defective, can between the inner surface of glass bulb and fluorescence coating, provide protective layer.This protective layer hinders mercuryvapour to touch glass bulb, to prevent the glass bulb variable color.Therefore, can suppress the long-time illumination of bulb and the decay of the light that produces.For example, in the Japanese patent application KOKAI announcement No.2003-272559 that does not examine this technology is disclosed.
A part of light towards the fluorescent lamp outside reflects at the surface-boundary place of glass bulb and air, and comes on the surface-boundary of glass bulb and protective layer.This protective layer is formed greater than the yittrium oxide of glass refraction, aluminium oxide, cerium oxide etc. by refractive index.In this case, from the law of refraction, entered protective layer by the light of the surface-boundary of glass bulb and air reflection.This light can not be used for illuminating fluorescent lamp around.Therefore, the utilization rate of the light of generation and efficient are not enough.
Summary of the invention
An object of the present invention is to provide the high fluorescent lamp of a kind of luminous flux.
Another object of the present invention provides a kind of utilance and high fluorescent lamp of efficient of the light that produces.
In order to realize this purpose, fluorescent lamp of the present invention comprises:
The glass tube bulb;
The low-refraction protective layer of the material that the refractive index of refractive index ratio glass is low, this low-index layer forms on the inner surface of glass tube bulb;
The fluorescence coating that on the low-refraction protective layer, forms;
Contain the discharge medium in the glass tube bulb; With
Make the electrode of discharge medium discharge.
Fluorescent lamp of the present invention can increase luminous flux by the outside that makes light arrive the glass tube bulb, and this is because the light that is reflected fully by the surface-boundary of glass tube bulb and air is reflected the result who causes again by the surface-boundary of glass tube bulb and low-refraction protective layer.
Description of drawings
By reading following detailed description and accompanying drawing, these purposes of the present invention and other purpose and advantage will become more obvious, in the accompanying drawing:
Figure 1A is the longitdinal cross-section diagram of the fluorescent lamp of first embodiment;
Figure 1B is the sectional view along the A-A line of Fig. 1;
Fig. 2 A is the figure of the fluorescent lamp operation of explanation first embodiment;
Fig. 2 B is the figure of the fluorescent lamp operation of explanation first embodiment;
Fig. 2 C is the figure of the fluorescent lamp operation of explanation first embodiment;
Fig. 3 is the part excision cross section of the fluorescent lamp of the 3rd embodiment;
Fig. 4 is the part excision cross section of the 4th embodiment;
Fig. 5 A is the longitudinal cross-section of the fluorescent lamp of the 5th embodiment;
Fig. 5 B is the cross section along the B-B line of Fig. 5 A;
Fig. 6 A is the longitudinal cross-section of the fluorescent lamp of the 6th embodiment; With
Fig. 6 B is the cross section along the C-C line of Fig. 6 A.
Embodiment
First to fourth embodiment according to fluorescent lamp of the present invention will be described with reference to the drawings.
First embodiment
The fluorescent lamp 111 of first embodiment is hot-cathode fluorescent lamps.Shown in Figure 1A, fluorescent lamp 111 has glass tube bulb 101, low-refraction protective layer 102, electrode 105, fluorescence coating 107 and discharge gas 140.
The similar straight tube of glass tube bulb 101 shapes for example, has the external diameter of 24.5mm, the internal diameter of 22.5mm and the total length of 225mm.Shown in Figure 1B, glass tube bulb 101 has the round cross section along the A-A line.
On the basic total inner surface of glass tube bulb 101, form low-refraction protective layer 102.This low-refraction protective layer 102 has separated discharge gas 140 and glass tube bulb 101, makes that the mercury in the discharge gas 140 can not touch glass tube bulb 101.
Low-refraction protective layer 102 is made by the low mixture of refractive index of refractive index ratio glass tube bulb 101, for example, is 1.2 to 1.3 calcirm-fluoride (CaF with the refractive index of 1: 1 percentage mix
2) and refractive index be 1.45 to 1.47 silicon dioxide (SiO
2) mixture.
The thickness of low-refraction protective layer 102 is between 0.05 and 3 micron, and preferably between 0.1 and 2 micron.This is because when low-refraction protective layer 102 to 3 micron thickness, might will be absorbed at low-refraction protective layer 102 places by light, feasible luminous flux attenuation by 101 radiation of glass tube bulb.When 102 to 0.05 microns of low-refraction protective layers were thin, discharge gas 140 separated with glass tube bulb 101, and as described below, and the total reflection from the light of glass tube bulb 101 outsides all will become difficulty.
The hollow space of glass tube bulb 101 is filled discharge gas 140.Discharge gas 140 is made up of the mercuryvapour and the inert gas of scheduled volume.Inert gas is used for the pressure in the glass tube bulb 101 is adjusted to predetermined low pressure, and it is the mist of argon and neon.The ratio of argon and neon is, for example, and the Ne of the Ar of 5 weight % and 95 weight %.Mercuryvapour is used for obtaining the ultraviolet light of fluorescence excitation layer 107.
Work
Next, the luminous work of the fluorescent lamp of said structure is described.
When voltage is applied to when making electric current flow through filament 106 on the electrode 105, filament 106 is heated.Filament 106 heat of emission electronics of heating.Hot electron collides with the mercury atom that contains in the discharge gas glass tube bulb 101 in.Bound electron in the mercury atom is by being excited with thermionic collision.When the bound electron that excites is moved to ground state, electrons excited emission ultraviolet ray (dominant wavelength 254nm).The ultraviolet ray of emission shines on the fluorescence coating 107 then, has excited the fluorescent particle in the fluorescence coating 107 then.From the excited fluorescent particulate, launch visible light (wavelength is approximately 400nm or bigger) then.This visible light is in proper order by low-refraction protective layer 102 and glass tube bulb 101.Therefore fluorescent lamp 111 sends luminous flux.
Around the glass tube bulb 101 is the air that refractive index is lower than glass tube bulb 101.Schematically show as Fig. 2 A, in the visible light of generation with the incidence angle θ 1 of the surface-boundary of air and glass tube bulb 101 greater than the light of predetermined size (critical angle) by the surface-boundary total reflection of glass tube bulb 101 and air.Therefore this light can not shine the outside of glass tube bulb 101.Angle of reflection θ 3 equals incidence angle θ 1.At this moment 2 of refraction angle θ are 90 degree or bigger.
Advanced on the surface-boundary of glass tube bulb 101 and low-refraction protective layer 102 with incidence angle θ 3 by the light of the surface-boundary total reflection of glass tube bulb 101 and air.
Here, if the refractive index of low-refraction protective layer 102 greater than the refractive index of glass tube bulb 101, according to the law of refraction, has all been entered low-refraction protective layer 102 by all light of the surface-boundary of glass tube bulb 101 and air reflection.
The refractive index of low-refraction protective layer 102 is less than the refractive index of glass tube bulb 101.
Therefore; be schematically shown as Fig. 2 B; according to the law of refraction; by the surface-boundary of glass tube bulb 101 and air refraction and advance in the light on the surface-boundary of glass tube lamp bubble 101 and low-refraction protective layer 102, incidence angle θ 3 also enters low-refraction protective layer 102 less than the light of the critical angle that the refractive index by glass tube bulb 101 and protective layer 102 limits.
On the other hand; be schematically shown as Fig. 2 C; by the surface-boundary of glass tube bulb 101 and air refraction and advance in the light on the surface-boundary of glass tube lamp bubble 101 and low-refraction protective layer 102, incidence angle θ 3 is equal to or greater than the light of this critical angle once more by the surface-boundary total reflection of glass tube bulb 101 and low-refraction protective layer 102.The light of total reflection advances on the surface-boundary of glass tube bulb 101 and air once more.A complete radiative part penetrates from the surface-boundary of glass tube bulb 101 and air.The light of remainder is once more by total reflection.This light repeats similarly work.
Therefore, compare the conventional fluorescent lamp of the refractive index of protective layer greater than glass tube bulb 101, more light can be transmitted into the outside of glass tube bulb 101 from the fluorescent lamp 111 with low-refraction protective layer 102.
The fluorescent lamp manufacturing method of first embodiment
Next, the fluorescent lamp manufacturing method with said structure is described.
At first, the double glazing pipe with commerce is cut into predetermined length.Next, with the inner surface of the glass tube of clean cut such as pure water.Then glass tube is heated to about 500 to 600 degrees centigrade temperature, makes decomposition such as any residual organic matter.
Next, regulate dispersing fluid (low-refraction protective layer dispersing fluid), described dispersing fluid disperses to form the calcirm-fluoride (CaF of low-refraction protective layer 102 in disperseing medium
2) and silicon dioxide (SiO
2) particle.Calcirm-fluoride (the CaF of 10 nanometer to 500 nanometer diameters
2) and silicon dioxide (SiO
2) particle is preferred.Ethanol is as decentralized medium.Notice that decentralized medium can be: water, methyl alcohol or isopropyl alcohol; Formic acid esters is methyl formate, Ethyl formate, propyl formate, isopropyl formate, butyl formate, iso-butyl formate, sec.-butyl formate for example; Acetic acid esters is methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate or sec-butyl acetate for example; Ketone is acetone, methyl ethyl ketone or hexone for example; Or aromatic hydrocarbons for example toluene, paraxylene or ortho-xylene.
Be used for to form the particle of the fluorophor that glows, green light fluorophor and the blue light-emitting fluorophor of fluorescence coating 107, also regulate the dispersing fluid (fluorescence coating dispersing fluid) that is dispersed in the decentralized medium.
Adhesive ingredients also can be included in the calcium dispersing fluid.Adhesive ingredients can be, for example, phenolic resins, epoxy resin, acrylic resin, celluosic resin (methylcellulose, ethyl cellulose, NC Nitroncellulose etc.), PVP (polyvinylpyrrolidone), Pioloform, polyvinyl acetal, PVA (polyvinyl alcohol), butyral resin or silicones etc.
Adhesive ingredients is stayed fluorescent lamp product inside as impurity at that time.Then therefore may reduce the life-span (durability) of product, luminous (brightness) and prevent reflection.Adhesive ingredients evaporates in the baking stage that next will illustrate then, up to there not being the residual degree of adhesive ingredients basically.
At first, low-refraction protective layer dispersing fluid is coated to the inner surface and the drying of glass tube bulb 101.Apply the fluorescence coating dispersing fluid then and toast.Spray method, immersion process, suction method or can be used as coating method in the method for glass tube bulb interior flushing with fluid.Electrostatic coating method or utilization sol-gel technique of the fluid of dissolution of metals alkoxide in organic solvent also can be used as coating method.
In glass tube, establish electrode then.Mercury and inert gas are contained in glass tube.The end of sealed glass tube then.
Therefore low-refraction protective layer 102 is formed on the inner surface of glass tube bulb 101.Arrange fluorescence coating 107 then in the above, with the fluorescent lamp 111 that provides first embodiment.
Second embodiment
Yet, exist by the light of the surface-boundary total reflection of glass tube bulb 101 and air to propagate into possibility till the fluorescence coating 107.In this case, the refractive index of preferred fluorescence coating 107 is lower than the refractive index of low-refraction protective layer 102, even so that for this light component, light also is launched into the outside of fluorescent lamp 111.Incident light is therefore by the surface-boundary total reflection of low-refraction protective layer 102 and fluorescence coating 107.
For the refractive index with fluorescence coating 107 is reduced to the refractive index that is lower than low-refraction protective layer 102,, for example comprising that equably the method for low-refraction material is effective in the fluorescence coating 107.Calcirm-fluoride (CaF
2), cerium fluoride-calcirm-fluoride (CeF
3+ CaF
2), magnesium fluoride (MgF
2), strontium fluoride (SrF
2), barium fluoride (BaF
2), ice crystal (Gryolite) (Na
2AlF
6) and silicon dioxide (SiO
2) wait and can be used as the low-refraction material.
By in fluorescence coating 107, placing the low-refraction material; when the refractive index of fluorescence coating 107 is lower than the refractive index of low-refraction protective layer 102, by the light of the surface-boundary total reflection of glass tube bulb 101 and air by the surface-boundary total reflection once more of fluorescence coating 107 and low-refraction protective layer 102.This light is come the outside of fluorescent lamp 111 then.
Therefore, compare the protective layer refractive index greater than glass tube bulb 101 conventional fluorescent lamp, can have more light to be transmitted into the outside of glass tube bulb 101 less than the fluorescent lamp 111 of the refractive index of low-refraction protective layer 102 from the refractive index of fluorescence coating 107.
The 3rd embodiment
Among superincumbent first and second embodiment, the invention that shows the application is applied to the example of hot-cathode fluorescent lamp, but the application's invention never is to be limited to this respect.The present invention can also be applied to cold-cathode fluorescence lamp.As shown in Figure 3, the difference of the fluorescent lamp 111 of the 3rd embodiment and first embodiment is to have cold cathode electrode 105.Electrode 105 is a flat.Lead-in wire 109 is connected to electrode 105.The others of this structure are identical with first embodiment.
The 4th embodiment
In first to the 3rd embodiment, show the example that electrode 105 is arranged in the interior electrode type fluorescent lamp 111 of glass tube bulb 101 inside.The present invention can also be applied to the dispatch from foreign news agency polar form fluorescent lamp of arrangement of electrodes in glass tube bulb 101 outsides.
As shown in Figure 4, the difference of the fluorescent lamp 111 of the 4th embodiment and first embodiment is to have the outer external electrode of placing 130 that is formed on glass tube bulb 101 two ends.External electrode 130 is made by the alloy of Fe-Ni.The others of this structure are identical with first embodiment.
The 5th embodiment
In first to fourth embodiment, fluorescence coating 107 is arranged on the low-refraction protective layer 102.Yet, can also between low-refraction protective layer 102 and fluorescence coating 107, arrange the high index of refraction protective layer 103 that refractive index ratio low-refraction protective layer 102 is higher.
In Fig. 5 A and Fig. 5 B, illustrated the example of this structure applications to hot-cathode fluorescent lamp.Shown in Fig. 5 B, the low-refraction protective layer 102 by on the inner surface of glass tube bulb 101, forming concentric circles with circular cross-section, afterwards be high index of refraction protective layer 103, be fluorescence coating 107 then, and form fluorescent lamp 111.
High index of refraction protective layer 103 is to utilize yittrium oxide (Y
2O
3) form.Yittrium oxide (Y
2O
3) refractive index be 1.75.
The thickness of high index of refraction protective layer 103 is 0.05 micron to 3 microns, and is preferably 0.1 micron to 2 microns.This is that this can be detrimental to outward appearance because when the thickness of high index of refraction protective layer 103 during less than 0.05 micron, because the mercury of glass tube bulb inside and Sodium chemistry are reacted, the dyeing of brown occurs on the inner surface of glass tube bulb.On the other hand, when the thickness of high index of refraction protective layer 103 during,, worry to reduce luminous flux because high index of refraction protective layer 103 absorbs visible lights greater than 3 microns.
For example, the fluorescent lamp 111 that can utilize following step structure to make in this way:
At first, with the yittrium oxide (Y that will form high index of refraction protective layer 103
2O
3) particle regulates the dispersing fluid (high index of refraction protective layer dispersing fluid) be dispersed in the decentralized medium.
Then, low-refraction protective layer dispersing fluid is applied on the inner surface of glass tube, carries out drying afterwards.Next, apply high index of refraction protective layer dispersing fluid, carry out drying afterwards, and apply the fluorescence coating dispersing fluid.This is baking then.The others of the 5th embodiment are identical with first to fourth embodiment.
The 6th embodiment
Among superincumbent first to the 5th embodiment, low-refraction protective layer 102 is arranged on the glass tube bulb 101.Also can between glass tube bulb 101 and low-refraction protective layer 102, provide air layer then.
In Fig. 6 A and Fig. 6 B, illustrated the example of this structure applications to hot-cathode fluorescent lamp.Shown in Fig. 6 B, by on the inner surface of glass tube bulb 101, provide with circular cross-section the air layer 108 of concentric circles, then be low-refraction protective layer 102, be fluorescence coating 107 then, form fluorescent lamp 111.
By air layer 108 is provided in this way, by the light of the surface-boundary total reflection of glass tube bulb 101 and fluorescent lamp 111 air outside once more by the surface-boundary total reflection of glass tube bulb 101 and air layer 108.Then this light is guided into the outside of fluorescent lamp 111.
For example, utilize following step can construct the fluorescent lamp of making in this way 111.
Low-refraction protective layer 102 forms the straight tube shape of radius less than glass tube bulb 101.Then the fluorescence coating dispersing fluid is applied to the inner surface of low-refraction protective layer 102.Toast after this.The article that toasted are inserted in the glass tube bulb 101 then.The others of the 6th embodiment are identical with first to fourth embodiment.
The 7th embodiment
Can between low-refraction protective layer 102 and fluorescence coating 107, provide air layer then.
Low-refraction protective layer 102 by forming concentric circles on for the inner surface of the glass tube bulb 101 of circle in the cross section, air layer 108 is provided, forms fluorescence coating 107 then, form fluorescent lamp 111.
By air layer 108 is provided in this way, by the light of the surface-boundary total reflection of glass tube bulb 101 and fluorescent lamp 111 air outside once more by the surface-boundary total reflection of low-refraction protective layer 102 and air layer 108.This light is drawn towards the outside of fluorescent lamp 111 then.
For example, the step below utilizing can be constructed the fluorescent lamp of making in this way 111.
Other embodiment
In the above embodiments, calcirm-fluoride (CaF
2) and silicon dioxide (SiO
2) mixture as low-refraction protective layer 102.Yet the present invention is limited to this aspect.Low-refraction protective layer 102 can also use calcirm-fluoride (CaF separately
2) or silicon dioxide (SiO
2).In addition, can also use magnesium fluoride (MgF
2: refractive index 1.38), strontium fluoride (SrF
2: refractive index 1.40 to 1.44), barium fluoride (BaF
2: refractive index 1.47), ice crystal (Gryolite) (Na
2AlF
6: refractive index 1.38) and cerium fluoride and calcirm-fluoride (CeF
3+ CaF
2: mixture refractive index 1.3 to 1.4).
In the above embodiments, yittrium oxide (Y
2O
3) can be used as high index of refraction protective layer 103.Yet the present invention is limited to this aspect.Can also use bismuth oxide (Bi
2O
3: refractive index 2.5), cupric oxide (CuO: refractive index 2.6), gadolinium oxide (Gd
2O
3: refractive index 1.8), chromium oxide (Cr
2O
3: refractive index 2.4), nickel oxide (NiO: refractive index 2.0 to 2.1), samarium oxide (Sm
2O
3: refractive index 1.8), zinc oxide (ZnO: refractive index 2.0), niobium pentaoxide (Nb
2O
5: refractive index 2.3), titanium monoxide (TiO: refractive index 2.2 to 2.3), titanium dioxide (TiO
2: refractive index 2.52), zirconium dioxide (ZrO
2: refractive index 1.95 to 2.05), ceria (CeO
2: refractive index 2.2) or aluminium oxide (Al
2O
3: any refractive index 1.65) or their mixture are as high index of refraction protective layer 103.
Can also use neodymium fluoride (NdF
3) and cerium fluoride (CeF
3) as low-refraction protective layer 102.
Neodymium fluoride (NdF
3) have 1.6 refractive index, and cerium fluoride (CeF
3) have a refractive index of 1.6.This means that the refractive index that constitutes the glass material of glass tube bulb 101 must be bigger when neodymium fluoride and cerium fluoride during as low-refraction protective layer 102, for example 2.0 to 2.2 etc.Glass with big refractive index for example can be made by comprise zinc in glass.
For fluorescence of top embodiment etc. 111, at fluorescence coating 107 places, Y
2O
3: Eu is as the fluorophor of red-emitting, BaMg
2Al
16O
27: Eu is as the fluorophor of emission blue light, and LaPO
4: Ce, Tb is as the fluorophor of transmitting green light.
Yet the present invention is limited to this aspect.Can also use Y
2O
3S:Eu, SrS:Eu, CaS:Eu, CaAlSiN
3: Eu and La
2O
2S:Eu etc. are as the fluorophor of red-emitting.In addition, ZnS:Ag, (Ba, Sr) MgAl
10O
17: Eu, Mn and (Ba, Sr, Ca, Mg)
10(PO
4)
6Cl
2: Eu etc. can be as the fluorophor of blue light-emitting.And, BaMgAl
10O
17: Eu, Mn, (MgCaSrBa) Si
2O
2N
2: Eu, Ba
2SiO
4: Eu, CeMgAl
11O
19: Tb, LaPO
4: Tb and (Ce, Gd) MgB
5O
10, Tb etc. can be used as the green emission body.
Shape shown in the embodiment, size and material are only quoted as an example in the above, never are restriction the present invention.For example, in the above embodiments, glass tube bulb 101 is straight tubes.Yet the present invention is limited to this aspect.Glass tube bulb 101 can also be for example U-shaped, W ring shape.
In the above embodiments, the inert gas that is contained in the discharge gas 140 is the mist of argon and neon.Yet the present invention is limited to this aspect.The mixture that can also use krypton or use krypton and argon and neon separately is as inert gas.And, also this gas can be mixed with other nonvolatile gas.
Not departing under the main spirit and scope of the present invention, can carry out various embodiment and variation to it.Above-described embodiment is for the present invention being described, not limiting the scope of the invention.Scope of the present invention illustrates by appended claim, rather than passes through embodiment.The various modifications of carrying out in the meaning of claim equivalence of the present invention and in the claim are considered within the scope of the invention.
The Japanese patent application No.2007-122823 that the application submitted to based on May 7th, 2007, and comprise specification, claim, accompanying drawing and summary of the invention.The disclosure of above-mentioned Japanese patent application all is included in here as a reference.
Claims (11)
1. a fluorescent lamp comprises: the glass tube bulb;
The low-refraction protective layer of the material that the refractive index of refractive index ratio glass is low, this low-refraction protective layer is formed on the inner surface of glass tube bulb;
The fluorescence coating that on this low-refraction protective layer, forms;
Contain the discharge medium in the glass tube bulb; With
Make the electrode of discharge medium discharge.
2. according to the fluorescent lamp of claim 1, wherein fluorescence coating comprises the low-refraction material;
This fluorescence coating has the refractive index lower than low-refraction protective layer.
3. according to the fluorescent lamp of claim 2, wherein the low-refraction material comprises and is selected from calcirm-fluoride (CaF
2), cerium fluoride-calcirm-fluoride (CeF
3+ CaF
2), magnesium fluoride (MgF
2), strontium fluoride (SrF
2), barium fluoride (BaF
2), ice crystal (Na
2AlF
6) and silicon dioxide (SiO
2) at least a.
4. according to the fluorescent lamp of claim 1, wherein between low-refraction protective layer and fluorescence coating, provide the high index of refraction protective layer of refractive index ratio low-refraction protection floor height.
5. according to the fluorescent lamp of claim 1, wherein the low-refraction protective layer comprises and is selected from calcirm-fluoride (CaF
2), cerium fluoride-calcirm-fluoride (CeF
3+ CaF
2), magnesium fluoride (MgF
2), strontium fluoride (SrF
2), barium fluoride (BaF
2), ice crystal (Na
2AlF
6) and silicon dioxide (SiO
2) material.
6. according to the fluorescent lamp of claim 1, wherein between glass tube bulb and low-refraction protective layer, provide air layer.
7. according to the fluorescent lamp of claim 1, wherein between low-refraction protective layer and fluorescence coating, provide air layer.
8. according to the fluorescent lamp of claim 1, wherein fluorescence coating comprises fluorophor at least a of the fluorophor that is selected from the fluorophor that glows, blue light-emitting and green light.
9. fluorescent lamp according to Claim 8, the fluorophor that wherein glows comprise and are selected from Y
2O
3S:Eu, SrS:Eu, CaS:Eu, CaAlSiN
3: Eu and La
2O
2S:Eu's is at least a.
10. fluorescent lamp according to Claim 8, wherein the fluorophor of blue light-emitting comprises and is selected from ZnS:Ag, (Ba, Sr) MgAl
10O
17: Eu, Mn and (Ba, Sr, Ca, Mg)
10(PO
4)
6Cl
2: Eu's is at least a.
11. fluorescent lamp according to Claim 8, wherein the fluorophor of green light comprises and is selected from BaMgAl
10O
17: Eu, Mn, (MgCaSrBa) Si
2O
2N
2: Eu, Ba
2SiO
4: Eu, CeMgAl
11O
19: Tb, LaPO
4: Tb and (Ce, Gd) MgB
5O
10, Tb's is at least a.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007122823A JP2008277226A (en) | 2007-05-07 | 2007-05-07 | Fluorescent lamp |
| JP2007-122823 | 2007-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101303959A true CN101303959A (en) | 2008-11-12 |
Family
ID=40054931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100887946A Pending CN101303959A (en) | 2007-05-07 | 2008-05-07 | Fluorescent lamp |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2008277226A (en) |
| KR (1) | KR20080099155A (en) |
| CN (1) | CN101303959A (en) |
| TW (1) | TW200849314A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137422A (en) * | 2011-11-22 | 2013-06-05 | 优志旺电机株式会社 | Rare gas fluorescent lamp |
| CN105742420A (en) * | 2016-04-13 | 2016-07-06 | 厦门大学 | Method for reducing color temperature of prepared cold white LED by light emitting sheet |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012064497A (en) * | 2010-09-17 | 2012-03-29 | Nec Lighting Ltd | Fluorescent lamp |
| CN113917776B (en) | 2020-07-09 | 2023-03-24 | 中强光电股份有限公司 | Wavelength conversion device and projection device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5051653A (en) * | 1987-06-12 | 1991-09-24 | Gte Products Corporation | Silicon dioxide selectively reflecting layer for mercury vapor discharge lamps |
| KR960706187A (en) * | 1994-08-25 | 1996-11-08 | 제이.지.에이. 롤페즈 | Low-pressure mercury vapour discharge lamp |
| JP2003157804A (en) * | 2001-11-21 | 2003-05-30 | Harison Toshiba Lighting Corp | Ultraviolet emission type fluorescent lamp and lighting system |
| JP2005285359A (en) * | 2004-03-26 | 2005-10-13 | Sumitomo Osaka Cement Co Ltd | Cold cathode fluorescent lamp and backlight for liquid crystal using the same |
| JP2006049280A (en) * | 2004-06-29 | 2006-02-16 | Matsushita Electric Ind Co Ltd | Fluorescent lamp |
| JP2006310167A (en) * | 2005-04-28 | 2006-11-09 | Toshiba Lighting & Technology Corp | Fluorescent lamp |
-
2007
- 2007-05-07 JP JP2007122823A patent/JP2008277226A/en active Pending
-
2008
- 2008-05-01 TW TW097116057A patent/TW200849314A/en unknown
- 2008-05-06 KR KR1020080041734A patent/KR20080099155A/en not_active Application Discontinuation
- 2008-05-07 CN CNA2008100887946A patent/CN101303959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137422A (en) * | 2011-11-22 | 2013-06-05 | 优志旺电机株式会社 | Rare gas fluorescent lamp |
| CN105742420A (en) * | 2016-04-13 | 2016-07-06 | 厦门大学 | Method for reducing color temperature of prepared cold white LED by light emitting sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080099155A (en) | 2008-11-12 |
| TW200849314A (en) | 2008-12-16 |
| JP2008277226A (en) | 2008-11-13 |
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Open date: 20081112 |