JPS6041751A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To obtain a fluorescent lamp having high efficiency and high color rendering properties by a method, in which the first layer phosphor is to contain antimony and manganese excitation halocalcium phosphate, while the second layer phosphor on the discharge side is to have a larger average color rendering valuation number than the first layer phosphor as well as small luminous flux. CONSTITUTION:In the phosphors, with which a glass tube inner wall is coated in two layers, the first layer phosphor is to contain antimony and manganese excitation halocalcium phosphate. Further, for the second layer phosphor, with which the discharge side is to be coated, a substance having a larger average color rendering valuation number than the first layer phosphor as well as small luminous flux is used. That is to say, for instance, the substance, which contains one kind or more of europium excitation borostrontium phosphate and di-europium excitation barium magnesium calcium chloroapatite having the luminous peak in the wavelength range of 470-500nm and also the substance, which contains tin excitation orthophophoric acid strontium magnesium and further containing one kind or more of manganese excitation zinc silicate, trivalent europium excitation yttrium oxide.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluorescent lamp with improved color rendering and high efficiency.

Conventional configurations and their problems Conventionally, as a method to improve the color rendering properties of fluorescent lamps,
Methods have been taken to mix phosphors that cure the divine emission spectrum to match the standard marshal's spectral distribution of the desired color temperature.

However, with this method, the red color has low lamp efficiency.
Because sufficient radiant energy must be distributed to the C region and the blue light region, the Lang efficiency is high.
+(+') Also, the mercury bright line spectrum, which is inevitably included in the radiation emitted from the firefly lamp, forms the spectral distribution, and there is a limit to the improvement of color rendering properties. There was.

As a solution to this problem, the following 21 categories of fluorescent lamps were proposed. - is a color rendering dog [aimed at improving IJ, and is based on the color rendering of a fluorescent lamp.
In order to control the intensity of the 06 nm and 436 nm mercury emission line spectra, for example, 4
A phosphor layer made of fluorogermanic acid containing valent manganese is provided, and a phosphor layer made of phosphors that emit light in evening, green, and orange colors is provided on the JL side.This is the so-called double co-1.
・It is a %” likelihood lamp that adopts the method.
:j, based on the recent 01 research result VC of color vision theory, about 4
50nm, about s 40nm, ,g/,)61゜n
A so-called 3-wavelength band-emitting type firefly using a rare type 1 autumn band-emitting phosphor with a mK emission spectrum peak)
Y, it's a lamp. This firefly lamp (61 (corresponding to cIDL type) color performance and general 11 ((Meigetsu fj + j
'JY; 1 achieves the highest luminous flux among lamps; however, the above 2 (φ class) fluorescent lamps still have their own problems. Namely, the former is EDL in JIS.
Although it has the best color rendering performance among lamps, the luminous flux of the lamp is significantly lower than that of the general type VC, and it is unknown that it is used for general lighting. 1-o On the other hand, the latter has high efficiency and high color mixing performance (l, !i, but as mentioned above, the JIS According to the regulations, the color rendering performance corresponds to that of the DL type, so there was a problem in applications where 1'l of faithful color reproduction is important.

As mentioned above, improvements to conventional fluorescent lamps are limited to improvements that place more emphasis on color rendering than efficiency (EDLDL type lamps), and conversely improvements that place more emphasis on efficiency than color rendering (DL type fluorescent lamps). Conventional &'', 6if chromaticity improved type fluorescent/
No improvements had been made to the SDLDL type lamps, which are the most commonly used lamps.

The purpose of the invention is to overcome the above-mentioned drawbacks of conventional fluorescent lamps and to provide a high efficiency, high color rendering 1'1 fluorescent lamp having color rendering properties equivalent to those of the SDL type. The purpose is 1.), 6 colors 1'l which are equivalent to or better than K's previous SDL type fluorescent lamp! ! This is a fluorescent lamp stand with a higher luminous efficiency than that of '4U.

Components of the Invention The inventors adopted the tablco-1 method, and the first layer of fluorine was deposited on the side of the glass tube, and the body was coated with antimony and mangaf. ,・Contains] and release it? l) 2nd layer A to be cured on the 7th side.
(.

The material has a higher average color rendering index and lower light weight than the first layer phosphor.I found that it was used (Is this the intended purpose?) and was stored in storage.

Example 8)1. In the present invention, the glass inner wall is coated with two layers of phosphor-1, the first layer of phosphor is 7rf-1, and the first layer contains phosphor-1, which contains manganese active halophosphate cal/ram. , - the second layer of fluorophores has an emission peak in the wavelength range of 470 to 50 nm, for example 2 j, active barium magnesium chloride/umu chloroapatite, 2-curve coropium I] active strontium chloro/liquidite and divalent europium active aluminate], at least 14 and 11 of rontium magnesium and tin Contains 1-active strontium magne/umium orthophosphate, and further contains manganese activated i4
Zinc acid, trivalent europium-activated yttrium oxide, trivalent europium-activated yttrium phosphovanadate, trivalent europium-activated inoI-lium vanadate, trivalent europium-activated yttrium oxysulfide, and tetravalent manganese-activated fluorogermane. Contains at least one of the following: Magnesium/Umium acid.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

The spectral distribution of the blue-green fluorescent yC substance used in the present invention is shown in FIGS. 1 and 2. In Figure 1, the curve 1 and 2
strontium borophosphate phosphor,
Curve 2 is divalent europium = J-activated strontium aluminate phosphor, curve 3 is divalent europium-activated strontium chloronori, curve 41; J, 21 songs activated with europium. Variuno magne/Rhamcal/Rhamchloroapatite fluorescent material 13 is not shown. In the second figure, the song i&! 5 to 1 manganese] (tongue 1) fW curved lead fluoride \Curve 6 is Suzui 1 active strontium magne/umum fluorescein, curve 7 is 31 songs active yttrium oxide fluoride, curve 7 8 is trivalent europium active phosphovanadate ino-lium phosphor, curve 9 is 31-track europium active inotriuno, oxysulfide phosphor, curve 1
0 indicates each spectral distribution of the manganese E1 active fluorogermane fYi2 magnesium phosphor. , These are the ones used in the EDL-type fluorescent lamp of the 1-type EDL type, which has a spectral distribution such as /1< in Figure 3. 1': A 3-wavelength light-emitting type firefly with 1 effect and excellent color rendering.

However, because the phosphors used are all rare earth phosphors, the lamp cost is almost the same as that of IJ.
JJf was announced in 2007, and it was widely praised for its practical application. Is there a way to reduce the lamp cost by (Φ/)?
One of the ways to do this is to provide a cheap phosphor layer on the color shield and a rare-earth phosphor layer on the h'i side, thereby reducing costs without sacrificing lamp characteristics. It has been proposed to do one. However, in this case, because the brightness of the phosphor provided on the glass tube side is brighter than that of the rare earth phosphor provided on the discharge side, the brightness of the first layer phosphor or the tail of the lamp as a whole may be lowered. It had the disadvantage of lowering the On the other hand, the EDL type fluorescent run according to the single code 1 method V is used:
1 lamp luminous flux, color rendering performance, Double Co I/Method V
Although this is an improvement over the EDL type fluorescent lamp based on C.C., there remains the problem that the luminous flux of the lamp is too low for use in general lighting.

E-type fluorescent lamps that emit light in three wavelength ranges can reduce lamp costs.1-11: SDL-type fluorescent lamps make a significant contribution to the direction of the lamp luminous flux. ) issued.

In other words, the lamp efficiency of a conventional single-coat type EDL type fluorescent lamp is about 6o4mha, whereas a fluorescent lamp using a calcium halophosphate phosphor has a lamp efficiency of about 7mha. s 1m/W, and the latter is brighter, so if this phosphor is used as the first layer phosphor, E
It has been found that it is possible to improve the luminous flux of the lamp compared to a DL type fluorescent lamp.

Figure 5 shows @: Calcium halophosphate of each ■Φ is used as the first layer phosphor, and the second layer phosphor is divalent europium activated strontium magnesium aluminate, a blue-green coloring phosphor, and a tin phosphor. Active strontium orthophosphate magne/
When a mixed phosphor with a red-emitting phosphor is used, the first layer phosphor coating i j, 1, the lamp luminous flux, (7. and the average color rendering index (hereinafter referred to as -1.RlL) ) relationship 7i
, small. In addition, the second layer firefly 7 (: (adhesion of A<) is 3g
There is. In Figure 5, (d) the first layer phosphor adhesion is zero;
9 of 1 7 LED lamps
7776 bundles and 0:R2L are also shown.

Figure 5 (L, Otake, small - 1 - curves 1 to C are ramps)' (I east, dashed lines 7J
Show a-1-4, song m & if Shiroi Harorin A:
Curve C is for a white halophosphate Cal/Tum phosphor, Curve C is a daylight halophosphate Cal/Tum phosphor.

From Figure 5, as shown in ``2'', by using the double coat 1 type, the second layer phosphor is brighter than the German fluorescent lamp (equivalent to the double coat type EDL type fluorescent lamp). It can be seen that a highly efficient SDL type fluorescent lamp having a higher Ra than the conventional SDL type fluorescent lamp can be realized.

Examples of the present invention will be described below in comparison with reference examples.

Example 1 3.8 g of a daylight-colored tunorsium phosphate phosphor was coated on the inner wall of a glass tube as a first layer phosphor. The second layer phosphor is a divalent europium-activated strontium borophosphate phosphor (spectral distribution il'j: song, v
l! 6) 470 g of trivalent eurobium ima'' active yttrium oxide phosphor (hereinafter referred to as phosphor B) (Figure 2 curve 7) and 10 g of manganese old zinc silicate phosphor (hereinafter referred to as phosphor C) Mix and apply 3 g of the powder to the first layer of phosphor 1. Hereafter: 1.3 Make a 40 watt fluorescent lamp in the usual manner. 1. The initial luminous flux of this lamp is 2480 βm. , Ra is 96/hi1, and the corresponding 9/1i is shown in Figure 6.

Example 2 Human body ≠ pipe I:, Y as first layer @ light body during daytime/C. Apply 4g of colored calcium halophosphate phosphor. 2nd layer phosphor: divalent europium \1 active strontium aluminate red sea bream /lam phosphor (curve 3 in Figure 1) 420gX
@ body A360g. Mix 860 g of X-Buddha luminous material, 40 g of trivalent europium innotorium ogi/Zarphite (curve 9 in Figure 2), and 040 g of fluorescent material / add 3 g to the first layer of fluorescent material / Q = cloth, and then a 40 watt firefly lamp is made by the usual method 1, the initial luminous flux of this lamp is 1, 2 4 5 01 m.

Is Ra 96? II was beaten. The element a1j is shown in FIG.

Example 3 4 g of a 1-me nine-color calcium halophosphate phosphor is applied as a first layer phosphor to the inside of the glass tube i:,Y. As the 21st fluorescent nine bodies, divalent europium-activated strontium chloro7-silicate fluorescer (Figure 1 curve 4) 480g, @photobody A450g1 fluorophore B10g5 manganese-activated magnesium fluorogermanate phosphor (Figure 2) Curve 10) A mixture of 5 g and 020 g of phosphor was placed on the first layer of phosphor.
After that, a 4Q Watt Eiyu lamp was manufactured by the usual method. The initial luminous flux i (J:
2 5 3 0βm1Ra was 97. The corresponding N'C distribution is shown in Figure 18.

Example 4 4 g of a daylight-colored halophosphate cal/lam phosphor is coated on the inner wall of a glass tube as a first layer phosphor. Second layer phosphor 2
Valence Europium Inquiry Barium Magne/Um Calcium Apatite Hotaru I Book (No. 11 [Song <tQ 2) 4s
o g −, fluorescent substance A 380 g, +: f
"Lum phosphor B 40g, trivalent europium (phosphorvanadate ino) l) Lamb phosphor (Figure 1 curve 3) 1og, 3
Yttrium vanadate fluorophore 10
Apply 3g of a mixture of 20g of g and ψ light body C,
Thereafter, a 40 watt fluorescent lamp was manufactured using the usual method. The initial luminous flux i' of this lamp. 2440
lrn and Ra are 96 to '111, and their spectral distributions are shown in Figure 9.

Reference example Antimony? , Lahalophosphate Cal/Rum 6 4 0
g.

Antimony and manganese halophosphate tunor/umum 150g, manganese search fit acid scolding lead 45g 1 tin;
"Active Orthostrontium Magne/Um 610g":
Old fluorokerman 1 rental magnesium 80
Mix 4g of this mixture and apply 4g of it to the inner wall of the interior of the building, then proceed as usual and turn on a 40 watt fluorescent lamp at f+.
make The initial luminous flux of this lamp η1-21 20 1m,
Ra was 92.

71 Types of Stones Used for the Firefly of this Cat - Since C1 is expensive, use of this phosphor: 11 will be reduced to reduce the lamp cost. In particular, it is a double-coat type and uses an inexpensive phosphoric acid/lamb phosphor as the first layer phosphor, and the present invention is different from this known technology in terms of objectives, effects, Furthermore, the structure is completely different. 3. Effects of the Invention As explained above, the present invention consists of two phosphor layers I~ coated on the inner wall of the glass tube, and a phosphor layer I~ coated on the glass tube side. Arrival '1
/The first layer phosphor contains antimony, active manganese, and calcium phosphate, and the second layer phosphor adhered to the discharge side is the first layer phosphor J. Rimo 31' has a large color rendering index and a small honor, R2L
It is possible to provide a fluorescent lamp which has an excellent inertia which is about 4 to 4 higher than that of a conventional SDL type fluorescent lamp and whose luminous flux is about 15 to 1 thicker than this. be,.

[Brief explanation of the drawing]

Fig. 1 is a spectral distribution diagram of the blue-green emitting phosphor used in the second layer phosphor, Fig. 2 is a spectral distribution diagram of the red emitting phosphor used in the second layer phosphor, and Fig. 3 is a spectral distribution diagram of the red-emitting phosphor used in the second layer phosphor. The figure is a spectral distribution diagram of a conventional EDL type fluorescent lamp, a 1 minute Xli diagram of a YC type fluorescent lamp emitting in the 4Md3 wavelength range, and the 51st layer 1 is the first layer fluorescent YC body cover; f, li 6 is a spectral distribution diagram of the fluorescent lamp of Example 1 of the present invention, and FIG. 7 is a diagram showing the fluorescent lamp of Example 2 of the present invention. The spectral distribution diagram of the lamp, FIG. 8 shows Y,'
9 is a spectral distribution diagram of a fluorescent lamp according to Example 4 of the present invention.

Claims (5)

[Claims] (1) Two phosphor layers are attached to the inner wall of the glass tube, and the first layer of phosphor attached to the glass tube side contains antimony and manganese active calcium phosphate. A fluorescent lamp characterized in that the second layer phosphor deposited on the discharge side has a higher average color rendering index and smaller luminous flux than the first layer phosphor. (2) The second layer phosphor has a phosphor that has an emission peak in the wavelength range of 4 to 600 nm, and a phosphor that has an emission peak in the wavelength range of 620 to 640 nm, and has a half value of 120 to 160 nm [1] 1. A fluorescent lamp according to Patent No. 1, characterized in that the fluorescent lamp contains a phosphor having the following properties. (3) Second layer phosphor (4) A phosphor with an emission peak in the wavelength range of 0-600 nm, and a phosphor with an emission peak in the wavelength range of 620-640 nm, 120-160 nm.
a phosphor having a half value of 11'' at a half value of 40 to 5 onm, and further (a) a phosphor having a peak at a wavelength of 520 to 64 onm and a half value of 11' of 40 to 5 onm; Firefly) Y having an emission peak in a wavelength range of 630 nm and a half value I+ of 2 to 20 nm. (c) emit light in the wavelength range of 640 to 6601 m) Y: a phosphor having a peak and mainly emitting its emission in the wavelength range of 600 to 700 nm; 'j(
, f books. A fluorescent lamp according to claim 1. (4) The phosphor having an R peak in the wavelength range of 476 to 500 nII1 is composed of divalent europium i.
Ummakunesiu J1 Calcium Chloroapakui 1, 2
Scope 2 of the patent, characterized in that it consists of at least one of the following: 1, 2, and 2 strontium magnesium aluminates. Fluorescent lamp as described in Section 2. (5) A phosphor having an emission peak in the wavelength range of 620 to 640 nm and a half value of 11] in the range of 120 to 160 nm contains tin-activated strontium magnesium orthophosphate. . A fluorescent rung according to claim 2.