JP2001303042A - Fluorescent substance for rapid starting type fluorescent lamp and rapid starting type fluorescent lamp using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the fluorescent substance capable of improving light flux sustainability of a rapid starting type fluorescent lamp by suppressing the fluorescent film from yellowing and the EC film from darkening without impairing the startup characteristics or the like of the lamp. SOLUTION: This fluorescent substance is obtained by sticking the particle surface of a host fluorescent substance consisting of a fluorescent substance for fluorescent lamps such as a three-wavelength emission-type fluorescent substance with ZnO:Zn microparticles at e.g. 0.01-5.0 mass % based on the host fluorescent substance. The other objective rapid-starting-type fluorescent lamp has a glass bulb 1 encapsulated with an electrically discharging gas, an transparent electroconductive film lined on the inner surface of the bulb 1, a fluorescent film 2 provided on the transparent electroconductive film, and electrode sealing elements 4 having respective electrode constructs set up on both ends of the glass bulb 1; wherein the fluorescent film 2 is composed of the above fluorescent substance stuck with ZnO:Zn microparticles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent substance for a rapid start type fluorescent lamp used for general lighting and the like,
And a rapid start type fluorescent lamp using the same.

[0002]

2. Description of the Related Art Fluorescent lamps include general lighting,
Recently, it is widely used as a light source for office automation equipment, a pixel light source for a huge screen, and the like. In addition, three-wavelength light emitting fluorescent lamps have been spreading remarkably in recent years because they satisfy both high efficiency and high color rendering properties for general illumination.

In the above-described fluorescent lamp, a discharge gas (a rare gas such as an argon gas) is sealed in a glass bulb having a fluorescent film provided on an inner surface thereof, and electrodes are arranged at both ends of the glass bulb. It is configured to generate a positive column discharge in the discharge gas between the electrodes. And
Ultraviolet rays are emitted from mercury by the discharge, and the fluorescent film is excited by the ultraviolet rays, thereby mainly obtaining visible light. Most of the ultraviolet light emitted from mercury is 185 nm and 254
It has a wavelength of nm.

As a fluorescent lamp for general lighting, a rapid start type fluorescent lamp has become widespread.
The rapid start type fluorescent lamp has a transparent conductive film (EC film / Nesa film) made of tin oxide (SnO) or the like formed on the inner surface of a glass bulb, and a fluorescent film is formed on the transparent conductive film. In addition, the starting property (lighting property) of the lamp is improved by lowering the tube wall resistance by the transparent conductive film.

[0005] In such a rapid start type fluorescent lamp, the fluorescent film is yellowed and the luminous flux is reduced with prolonged use, and a blackening phenomenon occurs in which a dark brown band-like spot is formed on the EC film. There is a problem that it is easy to do. These drawbacks are that mercury reacts with impurities such as hydrogen and carbon, and the mercury compound generated by this reaction is converted into a fluorescent film or EC.
It is thought to be due to the influence on the film.

That is, mercury compounds (reaction products of mercury with hydrogen or carbon) and mercury generated during lamp operation adhere to the surface of the fluorescent film. Rapid start fluorescent lamps have a fluorescent film formed on a conductive EC film.
Dielectric breakdown easily occurs in the fluorescent film. When a part of the fluorescent film breaks down due to dielectric breakdown, the mercury compound or mercury attached to the part does not easily separate, and further takes in impurities to form a mercury compound. Thus, it is considered that the mercury compound that has entered the fluorescent film causes yellow discoloration.

Further, when the mercury compound incorporated in the fluorescent film reaches the vicinity of the EC film, a slight discharge is generated due to a potential difference between the mercury compound and the EC film. Is thought to lead to
Such yellowing of the fluorescent film and blackening of the EC film cause a reduction in the luminous flux maintenance factor of the fluorescent lamp.

[0008]

As described above, in the rapid start type fluorescent lamp, the fluorescent film yellows with the use for a long time, and the blackening phenomenon occurs in the EC film. There is a problem that the luminous flux maintenance factor is lower than that of a normal fluorescent lamp.

As a means for preventing the yellowing of the fluorescent film and the blackening of the EC film, it is conceivable to increase the electric resistance of the EC film and reduce the potential difference. As a result, the starting voltage is increased, and the inherent characteristics of the rapid start fluorescent lamp, which is excellent in starting properties, are impaired. In particular, in a low-temperature environment such as 0 ° C. or less, the lamp does not start easily, which causes a drawback that the use of the lamp is limited.

SUMMARY OF THE INVENTION The present invention has been made to address such problems, and suppresses yellowing of a fluorescent film and blackening of an EC film without impairing the starting characteristics and the like of the rapid start type fluorescent lamp. , A fluorescent material for rapid-start fluorescent lamps, which can increase the luminous flux maintenance rate of the lamp,
And a rapid start type fluorescent lamp using the same.

[0011]

According to a first aspect of the present invention, there is provided a phosphor for a rapid start type fluorescent lamp, comprising: a phosphor matrix comprising a phosphor for a fluorescent lamp; and a particle surface of the phosphor matrix. And ZnO: Zn fine particles adhered to the substrate.

In the phosphor for a rapid start type fluorescent lamp according to the present invention, the ZnO: Zn fine particles may be attached in a range of 0.01 to 5.0% by mass with respect to the phosphor matrix. preferable. Further, as described in claim 3, the ZnO: Zn fine particles preferably have an average particle diameter in a range of 10 to 500 nm.

[0013] The yellowing of the fluorescent film and the blackening of the EC film in the rapid start fluorescent lamp are closely related to the tendency of the phosphor to be charged and the conductivity. From the viewpoint of the tendency of the phosphor to be charged, the electronegativity of the metal ion is more negative than the metal oxide having an electronegativity of 7.0, and the electronegativity of the metal ion is 11.8.
By being on the more positive side than the metal oxide, yellowing of the fluorescent film and blackening of the EC film can be suppressed. The tendency of the phosphor to be charged can be controlled by attaching a metal oxide or the like to its surface.

Therefore, in the present invention, ZnO: Zn fine particles are adhered to the particle surface of the phosphor matrix. ZnO: Zn
The fine particles are a compound in which Zn ions exist between crystal lattices of ZnO crystal, that is, a Zn-rich ZnO compound. Such ZnO: Zn has appropriate conductivity and emits green light when irradiated with, for example, ultraviolet light having a wavelength of 365 nm.

By adhering the ZnO: Zn fine particles as described above to the particle surface of the phosphor matrix, it is possible to prevent the phosphor film from falling off due to dielectric breakdown and to reduce the tendency of the phosphor to be charged. Value, and the movement of electrons in the discharge space can be made relatively easy, so that the yellowing of the fluorescent film and the blackening of the EC film can be prevented.

On the other hand, as described above, the ZnO: Zn fine particles have a 505 nm wavelength when irradiated with, for example, an ultraviolet ray having a wavelength of 365 nm.
Since the nearby green light is emitted, it is possible to suppress a decrease in the luminous efficiency of the fluorescent film due to the attachment of the metal oxide to the particle surface of the phosphor matrix, and also to improve the luminous brightness itself of the fluorescent film. It becomes possible. That is, the yellowing of the fluorescent film and the E characteristic characteristic of the rapid start fluorescent lamp can be achieved without deteriorating the good luminous efficiency and the starting characteristics of the lamp.
The blackening phenomenon of the C film can be suppressed with good reproducibility.

According to a seventh aspect of the present invention, there is provided a rapid start type fluorescent lamp, comprising: a glass bulb filled with a discharge gas; a transparent conductive film provided on an inner surface of the glass bulb; A rapid start type fluorescent lamp comprising: a fluorescent film formed on a conductive conductive film; and an electrode sealing portion having an electrode assembly provided at both ends of the glass bulb. It is characterized by containing a fluorescent material for a start-type fluorescent lamp.

[0018]

Embodiments of the present invention will be described below.

FIG. 1 is a partial sectional view showing the structure of an embodiment of a rapid start type fluorescent lamp according to the present invention. In FIG. 1, reference numeral 1 denotes a glass bulb, and a fluorescent film 2 is formed on an inner surface side of the glass bulb 1. The fluorescent film 2 is formed along the inner surface of the glass bulb 1 with a transparent conductive film 3 interposed therebetween, as shown in FIG. That is, the transparent conductive film 3 is first formed on the inner surface of the glass bulb 1, and the fluorescent film 2 is formed on the transparent conductive film 3.

At both ends of the glass bulb 1, stem portions 4 are sealed as electrode sealing portions. More specifically, both ends of the glass bulb 1 are hermetically closed by a flare stem 5. A pair of lead wires 6 are passed through the flare stem 5 in an airtight manner.
A hot cathode made of tungsten or the like, that is, a filament 7 is stretched between them. These lead wire 6 and filament 7 constitute an electrode. The surface of the filament 7 is coated with an electron emitting material such as barium oxide.

A discharge gas, that is, a predetermined amount of mercury and a rare gas such as argon at a predetermined pressure are sealed in such a glass bulb 1, and a rapid start fluorescent lamp 8 is constituted by these. . The rapid start type fluorescent lamp 8 mainly obtains visible light by applying a predetermined voltage to the electrodes at both ends to generate a positive column discharge and exciting the fluorescent film 2 with ultraviolet rays generated by the discharge. It is. In the figure, 9 is a glass bulb 1
These are bases provided around the stem portions 4 at both ends.

The transparent conductive film 3 functions as an EC film (Nesa film) of the rapid start type fluorescent lamp 6, and is made of, for example, a transparent conductive oxide such as tin oxide (SnO). . The transparent conductive film 3 has an electric resistance set in a range of, for example, 0.1 to 0.9 kΩ / cm. The rapid start type fluorescent lamp 6 has improved starting performance (lighting performance) of the lamp by lowering the tube wall resistance by the transparent conductive film 3 as described above.

The fluorescent film 2 formed on the transparent conductive film 3
For example, a suitable amount of ZnO: is applied to the particle surface of a phosphor matrix composed of a phosphor for a fluorescent lamp such as a three-wavelength emission phosphor.
It is mainly constituted by the phosphor for a rapid start type fluorescent lamp of the present invention to which Zn fine particles are adhered.

Here, the three-wavelength light emitting phosphor is 430 to 460.
blue region around nm, green region around 540-550 nm and 61
It has a main emission peak in each wavelength region of the red region around 0 to 620 nm, for example, a divalent europium-activated aluminate phosphor, a blue color composed of a divalent europium-activated halophosphate phosphor and the like A green light-emitting phosphor composed of a luminescent phosphor, a trivalent cerium and a trivalent terbium-activated rare earth phosphate phosphor, a trivalent europium-activated yttrium oxide phosphor, and a trivalent europium-activated yttrium oxysulfide phosphor A material obtained by appropriately mixing a red light-emitting phosphor made of, for example, is used.

The phosphor matrix in the phosphor for a rapid start type fluorescent lamp of the present invention is not limited to the above-mentioned three-wavelength light emitting type phosphor, but may be various types of fluorescent lamps depending on the use of the fluorescent lamp. Phosphors can be used.

An appropriate amount of ZnO: Zn fine particles is adhered to the particle surface of the phosphor matrix. ZnO: Zn
The fine particles are compounds in which Zn ions are present between the crystal lattices of ZnO crystals, that is, Zn-rich ZnO compounds, have appropriate conductivity, and emit green light around 505 nm when irradiated with, for example, ultraviolet light having a wavelength of 365 nm. It emits light. Zn existing between the crystal lattices of the ZnO crystal is
It is indispensable for obtaining light emission characteristics, and furthermore, imparts appropriate conductivity to ZnO which is originally an insulating oxide.

Such oxide fine particles having appropriate conductivity, that is, ZnO: Zn fine particles, are adhered to the surface of the phosphor matrix, whereby the tendency of the phosphor to be charged is reduced by a metal oxide having an electronegativity of 7.0 of metal ions. By making the negative side of the material and the positive side of the metal oxide having an electronegativity of metal ions of 11.8, the yellowing of the fluorescent film 2 and the EC film (transparent conductive film 3) peculiar to the rapid start type fluorescent lamp 8 are made. ) Can be suppressed.

That is, by imparting appropriate conductivity to the fluorescent film 2, it is possible to prevent the fluorescent film 2 from falling off due to dielectric breakdown and to adsorb mercury compounds which are reaction products of mercury atoms and impurities. And the mercury atoms and the mercury compound are easily separated from the fluorescent film 2 and the movement of electrons in the discharge space is relatively easy. Therefore, the yellowing of the fluorescent film 2 and the blackening of the EC film 3 are caused. Can be prevented from occurring.

In addition, the ZnO: Zn fine particles emit green light of about 505 nm when irradiated with, for example, ultraviolet light having a wavelength of 365 nm. A decrease in the luminous efficiency of the film 2 can be suppressed. Other examples of the conductive oxide include indium oxide (In ₂ O ₃ ) and tin oxide (SnO). For example, In ₂ O ₃ not only does not show light emission characteristics but also has a yellow body color. Therefore, the light emission characteristics of the fluorescent film 2 are hindered.

As described above, according to the phosphor film 2 using the phosphor for a rapid start type fluorescent lamp of the present invention, good luminous efficiency and lamp starting characteristics (the original startability of the rapid start type fluorescent lamp) are obtained. Without impairing the yellowing and EC of the fluorescent film 2 unique to the rapid start fluorescent lamp 6
Blackening of the film (transparent conductive film 3) can be suppressed with good reproducibility.

Zn adhered to the particle surface of the phosphor matrix
In order to obtain the above-described effects, the O: Zn fine particles have an impedance of 50 kΩ or less, and exhibit Zn emission between the crystal lattices of the ZnO crystal so as to emit green light when irradiated with ultraviolet light having a wavelength of 365 nm. Preferably, the amount of ions is adjusted. Specifically, ZnO: Zn is generated by subjecting zinc oxide (ZnO) to a heat treatment in a reducing atmosphere or the like to volatilize a part of oxygen. ZnO: Zn having both excellent conductivity and light-emitting characteristics can be obtained.

If the impedance of ZnO: Zn exceeds 50 kΩ, the effect of preventing the yellowing of the fluorescent film 2 and the blackening of the EC film 3 as described above may not be sufficiently obtained. ZnO: The impedance of Zn is 50Ω-50kΩ
And more preferably in the range of 50Ω to 20kΩ. Here, the conductivity of ZnO: Zn increases as the amount of Zn existing between the crystal lattices of the ZnO crystal increases, that is, as the volatilization amount of oxygen increases.
However, it is necessary to maintain the crystal structure of ZnO in order to obtain emission characteristics. Therefore, the amount of Zn existing between the crystal lattices of the ZnO crystal is adjusted within a range where both appropriate conductivity and light emitting characteristics can be achieved.

The amount of the ZnO: Zn fine particles attached is preferably in the range of 0.01 to 5.0% by mass based on the phosphor matrix. If the adhesion amount of ZnO: Zn fine particles is less than 0.01% by mass with respect to the phosphor base material, a sufficient coating effect cannot be obtained, and the yellowing of the fluorescent film 2 and the blackening of the EC film 3 as described above are prevented. The effect is insufficient. On the other hand, if the attachment amount of the ZnO: Zn fine particles exceeds 5.0% by mass with respect to the phosphor matrix, the intrinsic light emission characteristics (such as luminance and light emission color) of the phosphor film 2 are impaired. More preferably, it is in the range of 0.1 to 1.0% by mass.

It is preferable that the ZnO: Zn fine particles are uniformly attached (coated) to the particle surface of the phosphor matrix. To obtain such a uniform adhesion state of ZnO: Zn fine particles, Z
The average particle diameter of the nO: Zn fine particles is preferably 500 nm or less. ZnO: average particle diameter of Zn fine particles is 500 nm
If it exceeds, the particles cannot be uniformly attached to the particle surface of the phosphor matrix, and the effect based on ZnO: Zn may not be sufficiently obtained.

However, if the average particle diameter of the ZnO: Zn fine particles is too small, the crystallinity of the ZnO: Zn decreases, and the light emission characteristics (for example, around 505 nm when irradiated with ultraviolet light having a wavelength of 365 nm) are reduced even when heat treatment is performed. Green light emission characteristic) cannot be obtained. Therefore, it is preferable that the average particle diameter of the ZnO: Zn fine particles adhered to the particle surface of the phosphor matrix is 10 nm or more. ZnO: The average particle diameter of Zn fine particles is 20
The range of 範 囲 100 nm is more preferred. In the present invention, the average particle size represents an average of measured values of arbitrary 20 samples by SEM observation.

By uniformly covering the particle surface of the phosphor matrix with ZnO: Zn fine particles, a particularly good effect, that is, an effect of preventing the yellowing of the fluorescent film 2 and the blackening phenomenon of the transparent conductive film 3 can be obtained. However, even when ZnO: Zn particles having an average particle diameter of more than 500 nm are mixed with a phosphor and used, for example, the effect of preventing the yellowing of the fluorescent film 2 and the blackening phenomenon of the transparent conductive film 3 is reduced. Obtainable.

The phosphor in which ZnO: Zn fine particles are adhered to the particle surface of the phosphor matrix, that is, the phosphor for a rapid start type fluorescent lamp of the present invention is, for example, a phosphor matrix powder (for example, a three-wavelength light emitting phosphor powder or the like). The individual phosphor powders constituting it are dispersed in water together with a resinous binder, etc., and an appropriate amount of ZnO: Zn fine particles are added thereto and sufficiently stirred to form a uniform suspension. Can be obtained by drying.

The rapid start type fluorescent lamp 8 of the present invention
Has the fluorescent film 2 using the phosphor for a rapid start type fluorescent lamp of the present invention as described above, so that the luminous efficiency and the starting characteristics of the lamp are excellent (the original startability of the rapid start type fluorescent lamp). The yellowing of the fluorescent film 2 and the blackening phenomenon of the (transparent conductive film 3) unique to the rapid start type fluorescent lamp 6 can be suppressed with good reproducibility without impairing the above. As a result, the luminous flux maintenance rate of the rapid start type fluorescent lamp 8 can be greatly increased.
That is, it is possible to provide the rapid start type fluorescent lamp 8 capable of maintaining excellent lamp characteristics for a long period of time.

[0039]

Next, specific examples of the present invention and evaluation results thereof will be described.

Example 1 First, ZnO powder having a particle size of about 30 nm was prepared, put into an alumina crucible for about 7 minutes, and capped. This was heated at a temperature of 950 ° C. in a reducing atmosphere (H ₂ : 3%, N ₂ : 97%).
Baking for 3 hours.

The obtained fired product was pulverized, and the excitation spectrum and the emission spectrum were measured. As a result, the average particle size of the obtained fired product is about 30 nm, and the wavelength 365 nm
It was confirmed that ZnO: Zn emits green light of around 505 nm by excitation of ultraviolet rays. FIG. 3 shows the excitation spectrum distribution, and FIG. 4 shows the emission spectrum distribution. When the impedance of the ZnO: Zn fine particles was measured, it was 500 kΩ before firing, but became 10 kΩ by firing, and it was confirmed that the conductivity was significantly improved.

Next, 0.8 L (liter) of a 0.1% by mass acrylic resin solution was put into a beaker and stirred. First, 0.2 g of pulverized ZnO: Zn fine powder was added to this solution and sufficiently stirred. Further, 100 g of a three-wavelength light emitting phosphor (blue light emitting phosphor = (Sr, Ba, Ca) ₁₀ (PO ₄ ) ₆
Cl ₂ ; 40.0% by mass, green light-emitting phosphor = (La, Ce)
(P, B) O ₄ : Tb; 28.0% by mass, red light-emitting phosphor = Y
₂ O ₃ : Eu; 32.0% by mass) was added thereto and stirring was continued. After a uniform suspension was obtained, the suspension was filtered and dried.

When the phosphor thus obtained was observed with a scanning electron microscope (SEM), it was confirmed that 0.2% by mass of ZnO: Zn fine particles were uniformly adhered to the particle surface of the three-wavelength phosphor. Was confirmed. Zn on phosphor particle surface
The amount of O: Zn deposited is almost equal to the amount added, but can also be confirmed by ICP spectroscopy. Using this phosphor powder, a rapid start type fluorescent lamp was produced according to a conventional method. The structure of the fluorescent lamp is as shown in FIG. The electric resistance of the EC film is set to 0.1 to 0.9 kΩ / cm. The brightness of the obtained rapid start type fluorescent lamp and the incidence of blackening of the EC film after lighting for 5000 hours were evaluated. Table 1 shows the results.

Comparative Example 1 in Table 1 is a rapid start type fluorescent lamp manufactured in the same manner as in Example 1 except that a three-wavelength light emitting phosphor to which ZnO: Zn fine powder was not attached was used. Again, the brightness and
The blackening rate of the EC film after lighting for 5000 hours was evaluated.

[0045]

[Table 1] As is clear from Table 1, the use of the three-wavelength light-emitting phosphor to which ZnO: Zn fine powder is adhered increases the brightness by 5% compared to Comparative Example 1 (conventional fluorescent lamp), and Even after 5000 hours, no yellowing of the phosphor or blackening of the EC film was observed. This is because ZnO:
By adhering the Zn microparticles, the adsorption of mercury compounds, which are the reaction product of mercury atoms and impurities, is weakened. It is presumed that the movement of the particles became relatively easy, thereby preventing the yellowing of the phosphor and the blackening of the EC film.

Example 2 First, ZnO powder having a particle diameter of about 100 nm was prepared, and the same calcination treatment as in Example 1 was performed on the ZnO powder.
A ZnO: Zn fine powder which emits green light of about 505 nm by excitation of ultraviolet light having a wavelength of about 365 nm was obtained.

Next, Ca ₁₀ (PO ₄ ) ₆ · (F, C
l) ₂ : Sb, Mn (6500K type) phosphor was used, and the above-mentioned ZnO: Zn fine powder having an average particle diameter of about 100 nm was adhered to the particle surface of the phosphor by the same treatment as in Example 1. . The amount of ZnO: Zn fine powder attached was 0.5% by mass.

Using the obtained phosphor powder, a rapid start type fluorescent lamp was manufactured according to a conventional method. The brightness of the rapid-start fluorescent lamp and the blackening rate of the EC film after lighting for 5000 hours were evaluated. Table 2 shows the results. Note that Comparative Example 2 in Table 2 shows that ZnO: Z
This is an evaluation result of a rapid start fluorescent lamp manufactured in the same manner as in Example 2 except that a calcium halophosphate phosphor to which n fine powder is not adhered is used.

[0049]

[Table 2] As is apparent from Table 2, by using the calcium halophosphate phosphor to which the ZnO: Zn fine powder is attached,
Compared to Comparative Example 2 (conventional fluorescent lamp), the brightness was improved by 6%, and no yellowing of the phosphor and no blackening of the EC film were observed even after 5000 hours.

Examples 3 to 7 Each of the phosphors shown in Table 3 was prepared in the same manner as in Examples 1 and 2, and these phosphor powders were used.
A rapid start fluorescent lamp was manufactured according to a conventional method. The brightness of these rapid start fluorescent lamps,
The blackening rate of the EC film after lighting for 5000 hours was evaluated. The results are shown in Table 3. Note that Comparative Examples 3 to 7 in Table 3 are evaluation results of the rapid start type fluorescent lamps manufactured in the same manner as in each example except that a phosphor to which ZnO: Zn fine powder was not attached was used.

[0051]

[Table 3] As is clear from Table 3, by using a phosphor to which ZnO: Zn fine powder is attached, brightness is improved as compared with the conventional fluorescent lamps (Comparative Examples 3 to 7) and 5000
Even after the lapse of time, no yellowing of the phosphor or no blackening of the EC film was observed, or even a little.

[0052]

As described above, according to the phosphor for a rapid start type fluorescent lamp of the present invention, the yellowing of the fluorescent film and the EC film can be prevented without impairing the starting characteristics inherent in the rapid start type fluorescent lamp. The blackening phenomenon can be suppressed, and the luminance characteristics can be further improved. Therefore, according to the rapid start type fluorescent lamp of the present invention using such a phosphor, it is possible to greatly increase the total luminous flux and the luminous flux maintenance factor.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating a configuration of a rapid start fluorescent lamp according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the rapid start type fluorescent lamp shown in FIG.

FIG. 3 is a diagram showing an excitation spectrum distribution of ZnO: Zn manufactured in Example 1 of the present invention.

FIG. 4 is a diagram showing an emission spectrum distribution of ZnO: Zn manufactured in Example 1 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Glass bulb 2 ... Fluorescent film 3 ... Transparent conductive film 4 ... Stem part 7 ... Filament 8 ... Rapid start type fluorescent lamp

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09K 11/81 CPW C09K 11/81 CPW H01J 61/46 H01J 61/46 (72) Inventor Futoshi Yoshimura Kanagawa 8 Shinsugita-cho, Isogo-ku, Yokohama-shi Inside the Toshiba Yokohama Works Co., Ltd. 7-1 Nisshincho, Ichikawasaki-ku Toshiba Electronic Engineering Corporation F-term (reference) 4H001 CA07 CC03 XA05 XA08 XA09 XA15 XA17 XA20 XA38 XA39 XA56 XA57 XA58 YA25 YA51 YA63 YA65 5C043 AA03 AA06 CC10 CD01 DD28 EB07 EC03

Claims (8)

[Claims] 1. A phosphor matrix comprising a phosphor for a fluorescent lamp, and ZnO: Z adhered to the particle surface of the phosphor matrix.
What is claimed is: 1. A phosphor for a rapid start type fluorescent lamp, comprising: n fine particles. 2. The phosphor for a rapid start type fluorescent lamp according to claim 1, wherein the ZnO: Zn fine particles are present in an amount of about 0.1% with respect to the phosphor matrix.
A phosphor for a rapid start type fluorescent lamp, wherein the phosphor is attached in the range of 01 to 5.0% by mass. 3. The phosphor for a rapid start fluorescent lamp according to claim 1, wherein said ZnO: Zn fine particles have an average particle diameter in a range of 10 to 500 nm. . 4. The phosphor for a rapid start type fluorescent lamp according to claim 1, wherein the ZnO: Zn fine particles have an impedance of 50 kΩ or less and emit green light when irradiated with ultraviolet light having a wavelength of 365 nm. Characteristic phosphor for rapid start fluorescent lamps. 5. The phosphor for a rapid start type fluorescent lamp according to claim 4, wherein the ZnO: Zn fine particles have an impedance of 50Ω or more and 50kΩ or less. 6. The phosphor for a rapid start type fluorescent lamp according to claim 1, wherein said phosphor matrix is mainly used in each of a blue region, a green region and a red region. A phosphor for a rapid start type fluorescent lamp, comprising a three-wavelength light emitting phosphor having an emission peak. 7. A glass bulb filled with a discharge gas, a transparent conductive film provided on an inner surface of the glass bulb, a fluorescent film formed on the transparent conductive film, and both ends of the glass bulb. 7. A rapid start type fluorescent lamp comprising: an electrode sealing portion having an electrode assembly provided in claim 1. The fluorescent film according to claim 1, wherein the fluorescent film is a fluorescent material for a rapid start type fluorescent lamp. A rapid start type fluorescent lamp characterized by containing: 8. The rapid-start fluorescent lamp according to claim 7, wherein the transparent conductive film contains tin oxide.