JPS6047365A - Curved fluorescent lamp - Google Patents

Abstract

PURPOSE:To improve successive shifts of luminescent color and successive deteriorations of luminous flux by coating the inner surface of a soda glass bulb with the first luminous layer prepared from mixture consisting of a cheap phosphor and a metal borate and the second luminous layer consisting of an expensive phosphor. CONSTITUTION:The first and the second luminous layers are formed over the inner surface of a soda glass bulb. The first luminous layer is formed by mixture consisting of 50-90wt% of a cheap phosphor and 50-10wt% of a metal borate. The second phosphor is formed by an expensive phosphor. Owing to the large proportion (10-50wt%) of the metal borate, the first luminous layer firmly adheres to the inner surface of the soda glass bulb. Furthermore, the metal borate also works as a protective layer for the inner surface of the bulb. Accordingly, even when the second luminous layer is formed by an expensive phosphor such as a mixture of plural rare earth phosphors having emission peaks in three wavelength ranges, the shift of luminescent color and the attenuation of luminous flux can effectively be improved.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a curved tube type light Y6 lamp, and in particular, the glass bulb is entirely made of soda glass, and the inner surface of the I/C emitting layer has a thickness of 4.50, 540, and 610 nm. This paper relates to the improvement of color shift of emitted light color over time and deterioration of 10 bundles in a ring-shaped fluorescent lamp formed of a plurality of phosphors having all three wavelength ranges of 5 and 9 wavelengths.

[Background (, Shijutsu])

In general, a three-wavelength band type circular fluorescent lamp has a first light-emitting layer entirely formed on the inner surface of a bulb made of lead glass, for example, using a calcium helophosphate fluorescent chamber, and this light-emitting layer has a wavelength of 450 to 540 nm. , emitted in three wavelength regions near 610 nm
Second emission yc with Enoki's rare earth phosphor having all C peaks
It is composed of layers.

According to the V1 light lamp, the second light emitting layer is formed of an equivalent rare earth phosphor, but the 1st σ1 emission IC# is made of inexpensive calcium herophosphate fluorescein. 1 is formed on the light body, and the second light-emitting layer is set to be a thinner film (approximately %) than when used alone (-), making it possible to reduce the static and dynamic behavior of the lamp without significantly increasing the lamp cost. (F, high color rendering properties can be obtained, high quality lighting is possible1)
This will be the first one.

However, in recent years, lead glass, which is the bulb material for annular fluorescent lamps, has become a problem of environmental pollution during its manufacturing process, and as a result, a huge amount of equipment costs must be invested in pollution treatment. Or, user V
It is becoming difficult to provide C-ring type YC lamps economically.

Recently, I have been feeling like this tf(aI71,
Bulb A (can be changed to interest rate soda glass; ・
jsa11teb! 11, although VC has already been put into practical use in -7! 1. ′? When the 5+j and 7e layers are composed of a plurality of phosphors having emission peaks in three wavelength regions, the VC will cause a color shift in the emitted light color as the lighting time elapses.
A serious problem arises in that the attenuation of the six bundles becomes large.

For example, the light-emitting layer of the second layer is made of active calcium halophosphate firefly, and the second nine layers are made of 44
``7nm VC Yuan Yuan Beak all Eurobiuno, (J live lorophosphate storon thionem firefly solo 1 ig (Srs
(P(h)scR9Eu), 544nmVc/ij
Cerium with optical peak "t Tj.

Terhium-activated sulfuric acid (,14< D, a
, pot ; aθ, T'b) , 61], Fluorobium (<' thin oxide iso) IJium phosphor (YtOh: Mixed fluorescence 1 of Nagi 1
Annular fluorescent lamp constructed from books (B' OL 30 E
In X), the chromaticity point shifts sharply toward yellow as the lighting time elapses. 2. The decrease in luminous flux also increases. For example 2
8MPCD color shift occurs after 000 hours of lighting,
The [-1 luminous flux also reached 84.4% of the 0 hour value.
″lZl.

The reason for this is that the visible light in the short wavelength range is caused by the solarization of UV irradiation.
' is 11V, and it becomes easier to see and emit.
It is thought that color streaks occur in the six colors. Secondly, sorter glass has a higher degree of softening than lead glass (and during bending, it can be heated to a fairly high temperature Vc, so the blade 11 must be heated in order to become stronger). This is due to the fact that sl and liul are present on the inner surface, and this combines with mercury to form amalgam, inhibiting light transmittance.
It is thought that yQ t:, causes H deterioration and is also a factor in color fading.

In this way, in order to completely improve solarization and amalgamation (color shift between two light colors, luminous flux attenuation), ultraviolet rays reaching the inner surface of the bulb between the inner surface of the bulb and the light-emitting layer are completely suppressed, and It can be easily reasoned that all mercury contact must be completely inhibited + l-L moisture and the entire ψ layer formed.

For example, in Japanese Patent Publication No. 41-1.1628 VC, the inner surface of the valve is 'rMy1', and the distance between the layers is Kh? , diameter is 100m
A fluorescent lamp completely formed with protection 1 or alumina V is disclosed.

However, when this configuration is applied to +tL 'ill' type fluorescent light, an excellent effect can be obtained.
When using VC4, the VC alumina is not sufficiently vitrified, so the bulb's music K I +
47+, vc:t, -n, peeling occurs on the protection j・1゛g, and the intended purpose cannot be achieved.

[1) Indications of the invention] Therefore, is Book 9b Akira no Me IC oil? It is to provide a curved tube-shaped YC lamp that can effectively improve the emission color (U), color shift, and sound reduction of the one-element bundle by forming Ii#.

And 1. '$: 'The feature of IG Ming is that there is a soda glass lamp on the inner surface of the bulb. 20th light/Q layer? The first YC layer is formed by polymerization, and the first YC layer is made of a 50 to 90% by weight inexpensive fluorescent material mixed with a metal borate of 50 to 10% Ik%. Expensive fluorescent light 14 in the light emitting layer of 2
：Vc tesonezore + (1 has been completed.

According to this OJ invention, the first light-emitting layer is made of an inexpensive phosphor and <
1? It is composed of a mixed part A with metal borates of the genus IllIlI, and the proportion of metal borates in the luminescent layer is ]O
~5 () Since the width is J,, t%, the valve σ) is smaller than the sorter glass, and the (=JΔa) property for the inner surface can be completely improved, and the metal subpart/salt also functions as a companion for the inner surface of the bulb. do.

Therefore, it is possible to suppress the solarization caused by ultraviolet irradiation of the bulb, as well as the -j' malgamation of mercury and lithium precipitated on the inner surface of the bulb. For this reason, even if the entire ζ optical layer of vt, ::iτ2 is composed of a valuable phosphor, for example, a rare earth phosphor in the dual wavelength range yc light C, and the peak is the inverse of f, the color of the emitted light is Displacement, luminous flux σ) reduction? You can effectively dshi19.

However, the genus flIllll occupies the 69th layer of the first layer.
Acid>1.11? +311a) is 10 times 11% not hW
In a, solarize yeon.

Amano L) Poor suppression + +1 effect on J'l\ization,
50', stem seal +
l: There is a problem with peeling of the light emitting layer by fili. φl: Vc.

In addition, solarization layer is added to the second light-emitting layer to suppress amalgamation. Due to the effect of Yusong, sufficiently practical luminous flux characteristics can be obtained even if the number of expensive phosphors used in the entire second luminescent layer is reduced. Therefore, an example of application of the present invention to FOL30EX will be described.

Example] - Z) +6c made of soda glass supported in 1 molar q state
From one end of the 4-shaped half, antimony, manganese f'l active calcium halophosphate fluorine material 300/2 particle size is 0.1~
0.5μ0] Metal borate (0.9BaO-0, Yuaao
・2BIO! , ) 300, Nido I'' cellulose/butyl acetate solution 7 (lik) is coated with a suspension containing υiU L and dried to form the entire L rib S10 original light layer.In addition, the first light emitting layer σ ] The film thickness is 2.3119/-.

Next, a 4009 strontium lorophosphate fluorophore with a constant beam of 44'7 nm and a 1-pin beam was used.
, 544 nm l/c' + a of 0
07. '6], Eurobium active yttrium oxide phosphor 80Q with an emission peak of 7 at 1 nm, gold 1.4 borax salt 309. Alumina 309. Flow-coating 7 suspensions containing ethyl cellulose quinolol solution,
1:<- By drying, the second light-emitting layer is entirely formed on the light-emitting layer 1.4I-. The thickness of the second blurring layer is 2
．． 8"!/arp. Hereinafter, an annular fluorescent lamp Yt of FcL30EX is manufactured by a conventional method.

In this annular fluorescent lamp, the bulb's % external m irradiation V
There is little amalgamation caused by solarization and mercury α, and the luminescent color does not change after 2000 hours of lighting.
It was 3 MPCD, which was an improvement to 11 MPCD compared to the conventional 8 MPCD of 1 night.

In addition, the total nine bundles had a zero time of 20,951 m, and the 2000-hour lighting f VC attenuated to 91.7% of the initial iUl value, which was a great improvement compared to 84.4% in the conventional example.

The film thickness of the 20th and 76th layers is, for example, 1.7 to 3.
Any VC change can be made within the range of 8 to /R.

Example 2 In Example 1, the total film thickness of the second light emission j・jη is 30%
When the amount was decreased, almost the same results as in Example 1 were obtained.

By doing this, the cost is lower than that of FOL30EX in [Example]]
I was able to reduce 3 curses.

Example 1 Example] In I/C, the proportion of <
1> When the total proportion of borates was reduced to 10% by weight, 200
After lighting for 0 hours σ] The color shift was 4 MPCD, and the luminous flux retention rate was 90.8%.

In addition, in the song ``Nuninvention'', the song) 1°T-shaped firefly'/(the rung is l
'4 In addition to the shape The phosphor is not limited to the calcium phosphate fluorescein 1, and the composition of the metal borate can be changed as appropriate.Furthermore, the expensive phosphor of the second light emitting layer can be used. ＼ can also be used for rare earths other than those described in the examples 12, σ) other than rare earths for 7) = 28

Claims (1)

[Claims] ] on the inner surface of the bulb made of soda glass. , the second light-emitting layer is formed by complete polymerization, and the first light-emitting layer has a molecular weight of 50 to 9
With a mixed member of 0% by weight of inexpensive phosphor and 50=10kJ:% of metal borate, the second! This curved tube fluorescent lamp is characterized by the fact that each of the 69 layers is made up of 49q of 1% fluorescent material.