CN101271823A - Fluorescence lamp and its manufacture method - Google Patents

Fluorescence lamp and its manufacture method Download PDF

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Publication number
CN101271823A
CN101271823A CNA2008100872527A CN200810087252A CN101271823A CN 101271823 A CN101271823 A CN 101271823A CN A2008100872527 A CNA2008100872527 A CN A2008100872527A CN 200810087252 A CN200810087252 A CN 200810087252A CN 101271823 A CN101271823 A CN 101271823A
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CN
China
Prior art keywords
transparent tube
fluorescent lamp
refractive index
described transparent
regulating course
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2008100872527A
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Chinese (zh)
Inventor
今田浩二
真野泰广
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Hotalux Ltd
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NEC Lighting Ltd
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Filing date
Publication date
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Publication of CN101271823A publication Critical patent/CN101271823A/en
Pending legal-status Critical Current

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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
    • 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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
    • H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
    • 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
    • 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
    • H01J61/40—Devices for influencing the colour or wavelength of the light by light filters; by coloured coatings in or on the envelope

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

The invention provides a fluorescent lamp and a method of manufacturing the fluorescent lamp by low cost. The fluorescent lamp shows obviously enhanced transmittance of the fluorescence from fluorescent substances to obtain higher brightness, and at the same time to achieve saving power without increasing the category and processing step of the used material. The fluorescent lamp includes a transparent tube for packaging the rare gas and the mercury which generates ultraviolet ray through discharging, a fluorescent physical layer formed on the internal surface of the transparent tube, and a refractive index regulating layer collocated on at least one of the surface extending between the internal surface of the transparent tube and the fluorescent physical layer, and the external surface of the transparent tube, wherein the refractive index regulating layer includes yttrium oxide with average granular diameter of no more than 300nm.

Description

Fluorescent lamp and manufacture method thereof
The cross reference of related application
The present invention is based on and required the priority of the 2007-77560 Japanese patent application of submission on March 23rd, 2007, its disclosure is all incorporated this paper by reference into.
Technical field
The present invention relates to fluorescent lamp and manufacture method thereof.More specifically, the present invention relates to fluorescent lamp and the manufacture method thereof that brightness strengthens.
Background technology
In fluorescent lamp, stride across voltage that electrode applies and cause to seal up for safekeeping and be ionized, and the rare gas and the described electrode that allow to be ionized bump such as the rare gas within the transparent tube of glass tube, cause that this electrode sends secondary electron.Glow discharge has so just appearred.Sent the ultraviolet ray of 253.7nm by the mercury that glow discharge excited.By described ultraviolet irradiation the time, be provided in the fluorescent material that is comprised in the phosphor layer on the inner wall surface of described transparent tube and send fluorescence.In order to realize electric energy saving, require the luminous efficiency of such fluorescent lamp raising, thereby improve brightness from the fluorescence of illumination material by the quantity or the reduction power consumption that reduce the fluorescent tube that uses.
As shown in Figure 5, from the fluorescence of fluorescent material by the time such as the transparent tube 12 of glass, by two interfaces, that is, internal interface 12a and outer interface 12b.By in each interface, about 4% of light summation is reflected at light.Thereby the light quantity of transmitted light Lt is lowered to by about 92% of the fluorescence volume before the transparent tube.Have a kind ofly to strengthen uitraviolet intensity, with the method for the brightness that improves fluorescent lamp by improving the power loaded.Yet this method is also inadvisable, because it causes the deterioration of electrode and the luminous efficiency of reduction.More preferably, improve to light transmittance, to obtain to have the lamp of low-power consumption and high brightness from the fluorescence of described fluorescent material.Lamp be equipped with the yittrium oxide protective layer that forms between the phosphor layer of transparent tube and the inner surface, to be used to suppress owing under the situation of the deterioration of the UV-induced transparent tube such as glass of mercury, will cause the light transmittance lower to fluorescence.Because this inconvenience,, suppress the light reflection (patent documentation 1-3) at this transparent tube inner surface place by be coated with the inner surface of the described transparent tube of stain with the low refractive medium that comprises thin silicon grain etc.Yet, be difficult to hang down refractive medium and be applied to optimum thickness equably, particularly to the inner surface of transparent tube.If have only the outer surface of transparent tube to be coated with the described low refractive medium of stain, can't cause remarkable inhibition effect to the transparency reduction, so, although, do not obtain the effect that very has superiority owing to use expensive low refractive medium to cause the quantity of cost increase and treatment step to increase.
On the other hand, existing report has luminous enhancing characteristic and avoids the fluorescent lamp that layer breaks etc., it is equipped with yittrium oxide as main component, and the metal oxide layer formed of aluminium oxide, and be superimposed upon phosphor layer on this metal oxide layer, the primary granule of yittrium oxide wherein is sphere or substantially spherical, and particle diameter at 40nm to (patent documentation 4) between the 75nm.
The early stage publication of [patent documentation 1] Japan 2006-342023 number
The early stage publication of [patent documentation 2] Japan 2006-335881 number
The early stage publication of [patent documentation 3] Japan 2004-83307 number
The early stage publication of [patent documentation 4] Japan 2003-51284 number
Summary of the invention
The object of the present invention is to provide fluorescent lamp, described fluorescent lamp can show the light transmittance of remarkable enhancing to the fluorescence from fluorescent material to obtain higher brightness, realizes power conservation simultaneously, and need not to increase the species number and the number of process steps of institute's materials used.Another purpose is to make the method for above-mentioned fluorescent lamp with low cost.
Inventor of the present invention furthers investigate the yittrium oxide that uses in protective layer, and this protective layer used fluorescent lamp transparent tube in protection such as glass exempts from the uv damage from mercury.As shown in Figure 6, traditional fluorescent lamp 11 be equipped be formed between transparent tube 12 and the phosphor layer 13, be used to the protective layer 14 of protecting described transparent tube to exempt from uv damage, use yittrium oxide 14a etc. to form this protective layer 14.Because the particle of yittrium oxide is sphere or substantially spherical, so the surface scattering of the oxidized yttrium particle of fluorescence that sends of autofluorescence material.For this reason, lamp to the transmissivity of fluorescence with step-down.In order to suppress the reflection at protective layer place, use laminar yttria particles as shown in Figure 1 to form protective layer 4, show the output image of electron microscope at Fig. 1.Found to be equipped with this protective layer and made and the fluorescence loss might be reduced to the about 1% of fluorescence total amount, and in contrast thereto: be equipped with and use the traditional protection layer that sphere or substantially spherical yttria particles form and the loss of the fluorescence total amount about 10% that causes.The present invention is based on these and finds and knowledge finishes.
Promptly, the present invention relates to fluorescent lamp, it comprises rare gas and is used for producing the transparent tube of ultraviolet mercury seal in being contained in, be provided near electrode the both ends of described transparent tube and the phosphor layer that forms on this transparent tube inner surface by discharge, wherein, be equipped with the refractive index regulating course at the outer surface of the surface of extending between transparent tube inner surface and the phosphor layer, transparent tube at least one, and this refractive index regulating course comprises the yittrium oxide that average particulate diameter is not higher than 300nm.
The invention still further relates to a kind of method of making fluorescent lamp, this fluorescent lamp comprise with rare gas and be used for by discharge produce the transparent tube of ultraviolet mercury seal in being contained in, be provided near the described transparent tube both ends electrode, and the phosphor layer that on this transparent tube inner surface, forms.This method comprises: will comprise dispersant that average diameter is no more than the laminar yittrium oxide of 300nm and be applied at the outer surface of the surface of extending between transparent tube inner surface and the phosphor layer, transparent tube at least one, to form the refractive index regulating course.
Can realize power conservation, and need not to increase the species number and the number of process steps of institute's materials used the fluorescence from fluorescent material being shown remarkable enhancing light transmittance according to fluorescent lamp of the present invention with when obtaining higher brightness.
Can make this fluorescent lamp with low cost according to fluorescent lamp manufacture method of the present invention.
Description of drawings
Fig. 1 shows the graph-based that is used for according to the electron micrograph of the yittrium oxide of fluorescent lamp of the present invention;
Fig. 2 is the chart that has indicated according to refractive index regulating course in the fluorescent lamp of the present invention and reflection inhibition layer light transmittance;
Fig. 3 is the view that schematically illustrates the straight tube fluorescent lamp structure, and wherein straight tube fluorescent lamp is as an example according to fluorescent lamp of the present invention;
Fig. 4 is the partial view of explanation transmission fluorescence of an example of fluorescent lamp according to the present invention;
Fig. 5 illustrates the partial view of conventional fluorescent to the fluorescence transmission; And
Fig. 6 is the view that schematically illustrates the conventional fluorescent modulated structure.
Embodiment
Fluorescent lamp according to the present invention is characterised in that it comprises: by with rare gas be used for producing the transparent tube of ultraviolet mercury seal in being contained in, be provided near electrode two ends of described transparent tube and the phosphor layer that forms on the inner surface of this transparent tube by discharge, wherein be equipped with the refractive index regulating course at least one, and this refractive index regulating course comprises the yittrium oxide that average particulate diameter is not higher than 300nm at the outer surface of the surface of extending between transparent tube inner surface and the phosphor layer, transparent tube.
Employed transparent tube can be formed by any material that can see through visible light in fluorescent lamp of the present invention, for example glass.Described transparent tube can have one of following shape: linear, shaped form, annular, sphere etc.
Transparent tube will be used to produce ultraviolet mercury and encapsulate within it together such as the rare gas of argon or neon.Electronics that discharge generates in the described transparent tube and mercury atom collision are to excite this mercury atom.The mercury atom that is excited like this produces and comprises that wavelength is the ultraviolet ray of the ultraviolet ray of 253.7nm.Between the fluorescent lamp light emission period, the vapour pressure that is encapsulated in mercury in the described transparent tube for example 1 arrives in the scope of 10Pa.
Be equipped with pair of electrodes near two ends of transparent tube, described electrode causes the above-mentioned mercury atom of initiation to send ultraviolet discharge.Such electrode can be thermode or cold cathode type electrode.The example of this thermode comprise by by such as the oxide of barium, calcium, yttrium etc. the emitter material covered, each all comprises the thermode of tungsten filament etc.When voltage strides across described thermode and applies, emitter emitting electrons, described then electron ionization rare gas.The noble gas ion of the such ionization of quilt and this electrode collide are to cause glow discharge.As mentioned above, the electron excitation mercury that discharge generates sends ultraviolet ray to cause mercury.The example of this cold cathode type electrode comprises a pair of cup-shape electrode, and it is provided with by this way, so that their openings separately toward each other, each electrode is molded by nickel, molybdenum etc.When voltage strode across described cold cathode type electrode and applies, a little electrons that is present in the described transparent tube was collided with this rare gas of ionization with rare gas.The noble gas ion of the such ionization of quilt and this electrode collide are to cause discharge.The electronics that discharge generates and mercury collide exciting mercury atom, thereby cause that mercury atom sends ultraviolet ray.
Formed phosphor layer comprises fluorescent material on the inwall of this transparent tube, and described fluorescent material will send visible light by the ultraviolet irradiation of the 253.7nm that is sent by mercury atom the time.Preferably, described fluorescent material is difficult to be lost by heat waste, and has relatively poor mercury absorbability.Under some situation, between the fluorescent lamp light emission period, the situation of high mercury vapor pressure can continue for some time.Even in this case, preferred fluorescent material also can suppress because the deterioration of the transparent tube that mercury caused that absorbs in the described fluorescent material.The example of this fluorescent material comprises: Y 2O 3: Eu; YVO 4: Eu; LaPO 4: Ce, Tb; (Ba, Eu) MgAl 10O 17(Ba, Sr, Eu) (Mg, Mn) Al 10O 17Sr 10(PO 4) 6C 12: Eu; (Sr, Ca, Ba, Mg) 10(PO 4) 6C 12: Eu.Might comprise these fluorescent materials by phosphor layer: it is sent green when the 253.7nm of mercury is ultraviolet ray excited at quilt, the visible light separately in the red and blue scope, thus send white light with remarkable color rendering performance.
Fluorescent lamp according to the present invention comprises the refractive index regulating course of outer surface at least one of the surface of extending between the inner surface that is provided in transparent tube and the phosphor layer, transparent tube.For the visible light that sends from described fluorescent material, the refractive index regulating course that is provided in the transparent tube inner surface has the refractive index that is higher than transparent tube inner surface refractive index and is lower than the transparent tube refractive index, thereby plays the effect that suppresses owing to the fluorescence volume minimizing that causes takes place to reflect on described transparent tube interface.For the visible light that sends from described fluorescent material, the refractive index regulating course that is provided in the transparent tube outer surface has the refractive index that is lower than the transparent tube refractive index and is higher than air refraction, thereby plays the effect that suppresses owing to the fluorescence volume minimizing that causes takes place to reflect on described transparent tube interface.Such refractive index regulating course comprises the yittrium oxide that average particulate diameter is no more than 300nm.The average particulate diameter of yittrium oxide is preferably between 20 to 150nm, more preferably between 50 to 100nm.Provide the feasible possibility of the formed refractive index regulating course of yittrium oxide that is no more than 300nm by average particulate diameter: reduce by the fluorescence volume of described transparent tube boundary reflection.The particle of yittrium oxide is preferably similar laminar.The particle diameter of this laminar yittrium oxide can be defined as: corresponding to having and the thin slice diameter of a circle that equates of projected area in the plane.
Herein, the yittrium oxide average particulate diameter of being measured by laser diffraction particle size distribution analysis instrument can be used as the particle diameter of yittrium oxide.
When forming such refractive index regulating course, yittrium oxide is ground to have above-mentioned particle diameter.Yittrium oxide can rely on such as grindings such as jet mill, ball mill, sand mills.Might use such method, it comprises: preparation comprises the dispersant of the yittrium oxide that is ground like this, and this dispersant is applied to the interior or outer surface of transparent tube, and dries the dispersant that is applied like this.The example that is used for the specific dispersant medium of yittrium oxide dispersant comprises: water, and such as organic solvent of alcohol, butyl acetate and dimethylbenzene and composition thereof.The method that applies dispersant can be coated with stain, dipping, spraying etc. arbitrarily one of them.The example that oven dry is so applied with the method for dispersant coating with predetermined thickness comprises the nature oven dry, forces oven dry etc.Under the situation of forcing oven dry, when speed of blowing or temperature etc. were too high, coating surface was dried comparatively fast, and the oven dry speed in the coating is then lower.This causes acting on the surface and the inner stress of coating, the factor that its formation may be broken.Thus, oven dry preferably is controlled by the temperature and the speed of air blowing.
Preferably, fluorescent lamp according to the present invention comprises: the refractive index regulating course that forms on one of them at the outer surface of the surface of extending between transparent tube inner surface and the phosphor layer, transparent tube, and the reflection that forms on another surface suppresses layer.This reflection suppresses layer and preferably has the refractive index that is lower than described transparent tube.Being used to form the example that this reflection suppresses the material of layer comprises: a kind of, two or more select from silicon, aluminium, yttrium oxide zirconium, magnesium oxide, titanium oxide, the metal oxide of cerium oxide or magnesium fluoride.Described reflection suppresses the hollow subparticle that layer can comprise silicon with low-refraction etc.The example of such hollow subparticle comprises the diameter of those primary granules between 5 to 100nm, and the hollow subparticle of void ratio between 30 to 90%.The thickness that reflection suppresses layer for example 300 arrives within the 800nm scope.
Forming reflection inhibition layer can be suitably in conjunction with above-mentioned material.Similar refractive index regulating course, described reflection suppresses layer and can form by following method: the dispersant that the mixture of the powder type that use is selected prepares, this dispersant is applied to the interior or outer surface of the transparent tube that is not equipped with the refractive index regulating course, and dries the dispersant that is applied like this.
Can use the starter type lighting circuit that is independent of described fluorescent lamp outfit as the lighting circuit that drives fluorescent lamp of the present invention, this lighting circuit preheating electrode also produces high-voltage pulse.With the fluorescent lamp global formation and the quick startup type lighting circuit that contains the pressurizer that comprises electrode preheat circuit and booster circuit can be used as lighting circuit.The inverse type lighting circuit that contains high-frequency inverter circuit also can be used as lighting circuit.The fluorescent lamp that is integrated with this kind lighting circuit can be the fluorescent lamp of ball-type, or fluorescent lamp with the structure type outside transparent tube can being exposed to, the fluorescent lamp of described ball-type comprises bent type or the crooked transparent tube that is covered along circumference by spherical vessel, and the pedestal that is connected to described lighting circuit.
Fluorescent lamp according to the present invention is configured to: be equipped with fluorescent material, to be sent visible light by exciting from the 253.7nm of mercury atom ultraviolet ray, the refractive index regulating course is equipped with and, be suppressed at the fluorescence reflection on the interface of this transparent tube when allowing described visible light, thereby strengthen lamp brightness significantly by transparent tube.
According to the method for making such fluorescent lamp, on described transparent tube, form above-mentioned refractive index regulating course and reflection inhibition layer.Preferably, prepare thereafter in solvent, fluorescent material disperseed dispersant wherein, by processes such as dipping, sprayings described dispersant is applied to the refractive index regulating course then or reflection suppresses layer, has the coating of predetermined thickness with formation.Then, with the end of arrangement of electrodes in transparent tube, then wait with pedestal and seal described transparent tube, each of wherein said pedestal all has the outer lead that links to each other with related electrode.So just can make fluorescent lamp.
Hereinafter, will describe the present invention in more detail by exemplary embodiment, these embodiment are not intended to limit technical scope of the present invention.
[exemplary embodiment 1]
With particle diameter is that the laminar yittrium oxide of 800nm adds isopropyl alcohol to prepare the dispersant of 5% mass percent.With the dispersant of such preparation, soda-lime glass is coated with stain 30 seconds with 150rpm (revolutions per) formula of being rotated, oven dry then is the refractive index regulating course of 400nm to form thickness, to provide sample 2.
With particle diameter is that the 10 low refraction silicon grains that arrive 20nm add ethanol with the preparation dispersant.With the dispersant of such preparation, be rotated formula and be coated with stain receiving glass, oven dry then, the reflection that has 100nm thickness with formation suppresses layer, to provide sample 1.
Further, on the opposite face of soda-lime glass, form the refractive index regulating course identical and identical reflection suppresses layer with sample 2, to provide sample 3 with sample 1.
Use spectrophotometer UV-2300PC (making) to measure the light transmission separately of thus obtained sample 1-3 and soda-lime glass G as a comparison case by Shimadzu company.The result as shown in Figure 2.
[exemplary embodiment 2]
Fig. 3 shows an example of the cold-cathode fluorescence lamp that uses fluorescent lamp of the present invention.Above-described refractive index regulating course 4 and phosphor layer 3 are that order forms on the inner surface of Pyrex transparent tube 2 of 0.5mm at thickness, and reflection simultaneously suppresses layer 6 and forms on the outer surface of described transparent tube.The thickness of phosphor layer 3 is 20 μ m.Each nickel electrode 5 is disposed in each end of the opposite end of described transparent tube, seals the opposite end of this transparent tube then by unshowned seal.Mercury is encapsulated in the transparent tube, thereby has the vapour pressure of 1-10Pa when lamp is luminous, and is simultaneously wherein packed such as the rare gas of argon, to have the pressure of about 50 holders.
Form refractive index regulating course 4 by the following method.With particle diameter is the laminar yittrium oxide adding isopropyl alcohol of 800nm, to prepare the dispersant of 3% mass percent.Immerse the dispersant of preparation like this by the inner surface with glass tube, dry up then, can form thickness is the refractive index regulating course of 400nm.
Form reflection by the following method and suppress layer 6.To have the 10 hollow silicon grains that arrive the average particulate diameter of 20nm and add ethanol with the preparation dispersant.Can on the outer surface of transparent tube, form the reflection inhibition layer that thickness is 100nm by dipping.
As a comparison case, except neither being equipped with refractive index regulating course 4, not being equipped with reflection yet and suppressing to make the fluorescent lamp refractive index with mode same as described above outside the layer 6.
Utilize luminance meter (product of SR-3:TOPCON company), measure the transmitted light brightness that appears from transparent tube of the fluorescent lamp that obtains like this respectively.The brightness of fluorescent lamp of exemplary embodiment is than the brightness of fluorescent lamp high about 6% of Comparative Examples.Fig. 4 shows the fluorescence by the fluorescent lamp of described exemplary embodiment.
Can be applied to effectively on the fluorescent lamp that has thermode or cold cathode type electrode according to fluorescent lamp of the present invention.In addition, described fluorescent lamp can represent enhanced brightness and not increase power consumption, and can be with the low cost manufacturing.

Claims (7)

1. fluorescent lamp, it comprises: with rare gas be used for producing the transparent tube of ultraviolet mercury seal in being contained in, be provided near electrode the described transparent tube both ends and the phosphor layer that forms on described transparent tube inner surface by discharge, wherein, on at least one of the outer surface of the surface of extending between described transparent tube inner surface and the phosphor layer, described transparent tube, be equipped with the refractive index regulating course, and described refractive index regulating course comprises the yittrium oxide that average particulate diameter is not higher than 300nm.
2. fluorescent lamp as claimed in claim 1, wherein said refractive index regulating course comprises the lamelliform yittrium oxide that average diameter is not higher than 300nm.
3. fluorescent lamp as claimed in claim 1, wherein be equipped with described refractive index regulating course on one of them, on another surface, be equipped with reflection simultaneously and suppress layer at the described outer surface of the surface of extending between described transparent tube inner surface and the phosphor layer, described transparent tube.
4. fluorescent lamp as claimed in claim 2, wherein be equipped with described refractive index regulating course on one of them, on another surface, be equipped with reflection simultaneously and suppress layer at the described outer surface of the surface of extending between described transparent tube inner surface and the phosphor layer, described transparent tube.
5. fluorescent lamp as claimed in claim 4, wherein said reflection suppresses layer and comprises the hollow subparticle.
6. fluorescent lamp as claimed in claim 4, wherein said reflection suppresses layer and comprises metal oxide.
7. method of making fluorescent lamp, described fluorescent lamp comprises rare gas and is used for producing the transparent tube of ultraviolet mercury seal in being contained in, be provided near electrode the described transparent tube both ends and the phosphor layer that forms on described transparent tube inner surface by discharge, described method comprises: will comprise dispersant that average diameter is no more than the laminar yittrium oxide of 300nm and be applied at the outer surface of the surface of extending between described transparent tube inner surface and the described phosphor layer, described transparent tube at least one, to form the refractive index regulating course.
CNA2008100872527A 2007-03-23 2008-03-24 Fluorescence lamp and its manufacture method Pending CN101271823A (en)

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JP2007-077560 2007-03-23

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JP2010123542A (en) * 2008-11-21 2010-06-03 Toshiba Lighting & Technology Corp Liquid agent for coating diffusion film of high-pressure discharge lamp and high-pressure discharge lamp
JP6138588B2 (en) * 2013-05-27 2017-05-31 マイクロ波化学株式会社 Method for producing rare earth oxide fine particles

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Open date: 20080924