JP2000040491A - Circular fluorescent lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide circular fluorescent lamps prepared for a low profile luminaire, and to provide the luminaire using the circular fluorescent lamps. SOLUTION: This circular fluorescent lamp 1a (1b, 1c) is made of soda lime glass and has a circular outside diameter D1 approximately the same as a conventional circular fluorescent lamp, a bulb outside diameter d of 15-18 mm being smaller than that of a conventional bulb, and the thickness of 0.8-1.2 mm. A fluorescent material is applied on the internal surface of the glass bulb, and mercury and a rare gas are enclosed within the glass bulb. The circular fluorescent lamp 1a (1b, 1b) is lighted by the lamp voltage of 15-50 W and at the high-frequency of more 10 kHz.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ring-shaped fluorescent lamp and a lighting fixture using the ring-shaped fluorescent lamp.

[0002]

2. Description of the Related Art The glass bulb of a generally used ring-shaped fluorescent lamp has a ring outer diameter of, for example, 30 W and 22 mm.
5mm, 299mm for 32W type, 373mm for 40W type
The outer diameter of each of the glass bulbs is 29 mm.

[0003] Lighting equipment using this ring-shaped fluorescent lamp,
For example, as described in Japanese Patent Application Laid-Open No. 4-212276, a truncated cone-shaped appliance main body is provided on the lower surface of a top plate, and a socket and a lamp holder are symmetrically protruded downward from the appliance main body. The base of the ring-shaped fluorescent lamp is connected to the socket, the glass bulb part opposite to the base of the ring-shaped fluorescent lamp is fitted to the lamp holder, and the ring-shaped fluorescent lamp is disposed below the apparatus body. Then, high-frequency power is supplied to the ring-shaped fluorescent lamp by a high-frequency lighting circuit such as an inverter lighting circuit built in the appliance body, and the ring-shaped fluorescent lamp is turned on.

[0004] In recent years, there has been a tendency to reduce the size and thickness of interior goods in order to make the visual environment in a living space comfortable. Lighting fixtures are also positioned as part of the interior, and the demand for thinner devices is increasing because of the ability to make the ceiling look high.

[0005]

However, in the case of a conventional luminaire in which a ring-shaped fluorescent lamp is provided in the lamp body, there is a problem that it is difficult to make the entire apparatus including the ring-shaped fluorescent lamp thinner.

That is, since the ring-shaped fluorescent lamp is connected and held by the lamp holder and the lamp socket, a large space in the height direction is required, and the thickness of the fixture body becomes relatively large. Further, since a general ring-shaped fluorescent lamp has a tube outer diameter of 29 mm, there is a limit in forming a lighting fixture with a desired thickness.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ring-shaped fluorescent lamp which can be made thinner and a lighting device using the ring-shaped fluorescent lamp.

[0008]

The ring-shaped fluorescent lamp of the present invention has been used in many household lighting equipment and the like.
The size is substantially the same as the ring-shaped fluorescent lamps of the 0 W type, the 32 W type, and the 40 W type, and the thickness of the fluorescent lamp is reduced.

The outer diameter of the glass bulb is 15 to 18 mm.
Is within the range. When bending the glass bulb, the outer diameter of the tube may be slightly reduced to partially deviate from the above range, but in the case of the present invention, it is sufficient that most of the range is within the above range.

It is generally known that the efficiency of a fluorescent lamp is improved by reducing its tube diameter. Experiments have shown that in order to improve the lamp efficiency of the conventional annular fluorescent lamp by 10% or more, it is necessary to reduce the tube outer diameter to 65% or less. That is, the thickness is about 1
In the case of a glass bulb made of soda lime glass of about mm, particularly 0.8 to 1.2 mm, the outer diameter of the tube may be 18 mm or less. Further, it was visually confirmed that according to this size, the reduction in thickness of the ring-shaped fluorescent lamp was also sufficiently satisfied.

If the tube outer diameter is less than 15 mm, the lamp efficiency is numerically satisfactory, but the light output equivalent to that of the conventional ring-shaped fluorescent lamp cannot be obtained. It becomes extremely difficult to bend.

The ring diameter of the glass bulb is ±± the conventional ring outer diameter.
It is desirable to be within 5%. If it corresponds to the 30W type, the outer ring diameter is 210 to 235 mm, and if it corresponds to the 32W type, the outer ring diameter is 285 to 310 mm, 40
The outer ring diameter is 365 to 390 m if it corresponds to W type.
m.

The reason why this range is desirable is that, by reducing the tube outer diameter so as to approximate the conventional ring outer diameter, the lamp can be made thinner while maintaining the image of the size of the conventional ring-shaped fluorescent lamp. If the outer diameter of the tube is approximated, the discharge path length can be increased even if the outer diameter of the tube is small.

If the outer ring diameter exceeds 390 mm, the discharge path length becomes too large, and the starting voltage must be significantly higher than in the prior art. Is less feasible as a ring-shaped fluorescent lamp.

The ring-shaped fluorescent lamp of the first aspect has an outer ring diameter of 2 mm.
An annular glass bulb made of soda lime glass having a diameter of 85 to 310 mm, an outer diameter of the tube of 15 to 18 mm, and a thickness of 0.8 to 1.2 mm and having a phosphor applied to the inner surface side; enclosed in the glass bulb Mercury and a rare gas; and a pair of electrode means sealed at both ends of the glass bulb so as to generate a discharge in the glass bulb.
It is characterized in that it is configured to be lit at a lamp power within the range of ４０40 W and at a high frequency of 10 kHz or more.

When the ring-shaped fluorescent lamp of claim 1 is turned on with an input of about 23 W, the lamp efficiency is improved by about 10% as compared with the conventional 32 W-type ring-shaped fluorescent lamp, and the total luminous flux of substantially the same level is output. When the lamp is turned on at an input of about 38 W, the total luminous flux is significantly improved as compared with the conventional 32 W ring-shaped fluorescent lamp, and the light is turned on at substantially the same level of efficiency. When the lamp is turned on with an input of 27 W, the same luminous flux as the conventional one is output, and the lamp is turned on with improved lamp efficiency.

However, it is not necessary to light all the lamps with a lamp power within the range of 20 to 40 W, and it is sufficient that the lamp is lit with the desired lamp power within this range being determined as the rated power.

According to a second aspect of the present invention, in the annular fluorescent lamp of the first aspect, the rated lamp power is 23 W, and the high-power characteristic lamp power is 38 W.

A third aspect of the present invention is characterized in that, in the ring-shaped fluorescent lamp of the first aspect, the rated lamp power is 27 W and the lamp power of the high output characteristic is 38 W.

The ring-shaped fluorescent lamp according to claim 4 has an outer ring diameter of 3 mm.
An annular glass bulb made of soda-lime glass having a diameter of 65 to 390 mm, an outer diameter of the tube of 15 to 18 mm, and a thickness of 0.8 to 1.2 mm, and a phosphor applied to the inner surface side; A pair of electrode means sealed at both ends in the glass bulb so as to generate a discharge in the glass bulb;
It is characterized in that it is configured to be turned on at a lamp power within the range of ５０50 W and at a high frequency of 10 kHz or more.

When the ring-shaped fluorescent lamp according to claim 4 is turned on with an input of about 30 W, the lamp efficiency is improved by about 10% as compared with the conventional 40 W-type ring-shaped fluorescent lamp, and the same luminous flux is output at substantially the same level. When the lamp is turned on at an input of about 48 W, the total luminous flux is greatly improved as compared with the conventional 40 W ring-shaped fluorescent lamp, and the light is turned on at almost the same level of efficiency. When turned on with an input of 34 W, the entire luminous flux equivalent to the conventional one is output, and the lamp is turned on with improved lamp efficiency.

However, it is not necessary to turn on all the lamp power within the range of 28 to 50 W, and it is sufficient that the lamp is lit at a desired lamp power within this range.

A fifth aspect of the present invention is characterized in that, in the ring-shaped fluorescent lamp of the fourth aspect, the rated lamp power is 30 W and the lamp power of the high output characteristic is 48 W.

A sixth aspect of the present invention is the annular fluorescent lamp of the fourth aspect, characterized in that the rated lamp power is 34 W and the high-power lamp power is 48 W.

The ring-shaped fluorescent lamp according to claim 7 has an outer ring diameter of 2 mm.
An annular glass bulb made of soda-lime glass having a tube diameter of 10 to 235 mm, an outer diameter of 15 to 18 mm, and a wall thickness of 0.8 to 1.2 mm, and a phosphor applied to the inner surface side; enclosed in the glass bulb A pair of electrode means sealed at both ends of the glass bulb so as to generate a discharge in the glass bulb;
It is characterized in that it is configured to be lit at a lamp power within a range of ３０30 W and at a high frequency of 10 kHz or more.

When the ring-shaped fluorescent lamp of claim 7 is lit at an input of about 17 W, the lamp efficiency is greatly improved as compared with a conventional 30 W-type ring-shaped fluorescent lamp, and the lamp is lit at a power of 28 W. It outputs a total luminous flux higher than before and lights up with a lamp efficiency higher than before. When the lamp is turned on with an input of about 20 W, the lamp efficiency is significantly higher than that of the conventional 30 W type lamp, which is at an intermediate level between the total luminous flux of 17 W and 28 W and the lamp efficiency.

However, it is not necessary to turn on all of the lamp power within the range of 28 to 50 W, and it is sufficient if the lamp is turned on at a desired lamp power within this range.

[0028] An eighth aspect of the present invention is the annular fluorescent lamp according to the seventh aspect, characterized in that the rated lamp power is 18 W and the lamp power of high output characteristics is 28 W.

A ninth aspect of the present invention is the annular fluorescent lamp according to the seventh aspect, wherein the rated lamp power is 20 W and the lamp power of the high output characteristic is 28 W.

In the above, the rated lamp power is defined as JI
The lamp power displayed on the lamp as defined in SC7601. This is a value that is substantially equal to the power output from the lighting circuit in the lighting device when the lighting device is mounted and turned on.

The glass bulb is made of soft glass such as soda lime glass or lead glass, but may be made of hard glass such as borosilicate glass or quartz glass.
The thickness of the valve is desirably about 0.8 to 1.2 mm, but is not limited thereto.

The noble gas sealed in the valve includes argon, neon, krypton, and the like.

As the pair of electrode means, a hot cathode type electrode in which an emitter material is applied to a filament can be used, but other electrode means may be used. When it is necessary to light the lamp with high output, it is preferable to use a triple coil for the hot cathode type electrode.

According to the ring-shaped fluorescent lamps of the first to ninth aspects, it is possible to construct a lighting apparatus which is almost the same size as a general lighting apparatus, but has an improved thinness, and has a total luminous flux. Lamp characteristics such as lamp performance and efficiency can be obtained that are equal to or better than those of the conventional ring-shaped fluorescent lamp.

According to a tenth aspect, in the annular fluorescent lamp according to any one of the first to ninth aspects, the phosphor has a peak wavelength of about 450 nm, about 540 nm, or about 610 nm.
Characterized in that it is a three-wavelength emission type.

As the three-wavelength light emitting phosphor, 450 n
m as a blue phosphor having an emission peak wavelength near m
Mg ₂ Al ₁₆ O ₂₇ : Eu ²⁺ , as a green phosphor having an emission peak wavelength near 540 nm (La, Ce, Tb)
PO ₄ , Y ₂ O ₃ : Eu ³⁺ or the like can be applied as a red phosphor having an emission peak wavelength near 610 nm.
It is not limited to these.

In the ring-shaped fluorescent lamp according to the tenth aspect, in addition to the function of the ring-shaped fluorescent lamp according to any one of the first to ninth aspects, the lamp efficiency is further improved by the three-wavelength light emitting phosphor.

According to the eleventh aspect of the present invention, there is provided a ring-shaped fluorescent lamp.
The ring-shaped fluorescent lamp according to any one of to 10
A protective layer made of metal oxide fine particles is formed on the inner surface of the glass bulb, and a phosphor is coated on the protective layer.

As the metal oxide fine particles of the protective film, known materials such as alumina (Al ₂ O ₃ ) and silica (SiO ₂ ) can be used.

The ring-shaped fluorescent lamp according to the twelfth aspect is characterized in that
The ring-shaped fluorescent lamp according to any one of to 11;
The amalgam is provided near the electrode means.

The vicinity of the electrode means a position such as a lead wire for supporting the electrode, a stem for supporting the wire, or a thin tube disposed on the stem. It is fixed or stored in any of these positions by means.

The ring-shaped fluorescent lamp of the thirteenth aspect is the first aspect of the invention.
The ring-shaped fluorescent lamp according to any one of to 11;
It is characterized by comprising an amalgam movably housed in a glass bulb.

The amalgam according to claim 12 or 13, wherein bismuth (Bi) is a substance which forms an alloy with mercury;
It is an alloy of mercury and at least one selected from indium (In), lead (Pb), tin (Sn), zinc (Zn), cadmium (Cd), silver (Ag) and the like. For example, bismuth-indium-mercury, bismuth-indium-lead-mercury, bismuth-tin-mercury, zinc-mercury and the like are applicable. The amalgam may be in any shape such as a pellet, a column, and a plate.

In the ring-shaped fluorescent lamp according to the twelfth or thirteenth aspect, in addition to the function of the ring-shaped fluorescent lamp according to any one of the first to eleventh aspects, since the amalgam is disposed in the glass bulb, the ambient temperature is relatively high. The ring-shaped fluorescent lamp is turned on in an optimal state.

A lighting device according to a fourteenth aspect of the present invention provides a lighting device, a ring-shaped fluorescent lamp according to any one of the first to thirteenth disposed on the device body; And a lighting circuit for supplying lighting power of ５０50 W.

A luminaire according to claim 15 is: a luminaire main body; a ring-shaped fluorescent lamp selected from at least two of claims 1, 4 and 7 disposed on the luminaire main body; And a lighting circuit for supplying lighting power of 17 to 50 W.

A luminaire according to a sixteenth aspect of the present invention provides a luminaire main body; a ring-shaped fluorescent lamp according to the second or third aspect disposed on the luminaire main body; and a ring-shaped fluorescent lamp according to the fifth or sixth aspect disposed on the luminaire main body. A lamp; and a ring-shaped fluorescent lamp according to claim 8 or 9 disposed on the fixture body;
A lighting circuit having a switching means capable of supplying lighting power at a high frequency of not less than Hz and switching to one of a rated lamp power and a lamp power having high output characteristics.

[0048] In Claims 14 to 16, the apparatus main body is of a ceiling direct mounting type, a ceiling hanging type or a wall mounting type,
A glove, a shade, a reflective shaver, or the like may be attached, or a globe, a globe, a globe, a shade, a reflection shaver, or the like may be attached.

The switching means may be divided into a mode for illuminating the annular fluorescent lamp with high efficiency and a mode for illuminating the ring-shaped fluorescent lamp with high output, or may be a means for continuously changing between these modes.

Incidentally, a plurality of annular fluorescent lamps having different lamp powers may be mounted on a lighting fixture so as to be concentrically arranged on the same plane. On the other hand, 2
1 with the glass bulbs concentrically arranged on the same plane
An annular fluorescent lamp integrally formed to form a discharge path of a book has been developed. In this integrated ring-shaped fluorescent lamp, electrodes are sealed at one end side of two glass bulbs having different ring diameters, and the other end side is hermetically sealed and a communication portion is formed so as to form a discharge passage communicating with each other. It had.

When a plurality of ring-shaped fluorescent lamps having different lamp powers are arranged concentrically on the same plane, their appearance is similar to that of an integrated ring-shaped fluorescent lamp.

However, since the integrated fluorescent lamp is connected by the communicating portion, the mechanical strength may be reduced. In addition, the gap between the inner diameter of the outer bulb and the outer diameter of the inner bulb cannot be made too large because of the formation of the communicating portion. If the gap is not large, the light output from the vicinity of the gap may not be used effectively. Further, it is necessary to change the arrangement height of the annular bulb in accordance with the shape of the lighting fixture main body or the optical characteristics of the lighting fixture, and to mount the annular bulb on the fixture main body.

Therefore, it is better to combine a plurality of ring-shaped fluorescent lamps each composed of one annular bulb with different ring diameters in terms of strength and optical properties, and as a result, it is possible to mount the fluorescent lamps on a lighting fixture. Also increase the degree of freedom.

In the lighting apparatus of the sixteenth aspect, the lighting of the annular fluorescent lamp is adjusted by switching the switching means of the lighting circuit. For example, when the switching unit is divided into a mode for high-efficiency lighting and a mode for high-power lighting, the ring fluorescent lamp can be used by appropriately selecting these modes according to use conditions. .

[0055]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of a ring-shaped fluorescent lamp and a lighting fixture according to the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention. FIG. 1 is a sectional view of a lighting fixture, FIG. 2 is a perspective view of the lighting fixture in an exploded state, and FIG. 3 is a plan view of a ring-shaped fluorescent lamp. FIG.

In the figure, reference numerals 1a and 1b (or 1c) denote ring-shaped fluorescent lamps having an annular glass bulb 2, in which a discharge medium made of a rare gas and mercury is sealed and glass is enclosed. On the inner wall surface of the bulb 2, a protective film composed of alumina (Al ₂ O ₃ ) fine particles and a phosphor layer composed of a phosphor of a three-wavelength emission type are formed. At both ends of the glass bulb 2, filament electrodes as electrode means are provided. The base 3 is provided so as to extend between both ends of the glass bulb 2.

The base 3 has 4 connected electrically to the electrodes.
The base pin 4 of the book is provided so as to be inclined toward the lamp center. The base pins 4 are disposed on the base 3 so as to form a rectangle with four pins, and a large interval is provided between a pair of pins attached between the filaments.

The distance between the pair of pins attached between the filaments is about 6 mm, and the distance between the pair of pins is about 1 mm.
The distance is set to 0 mm, which is different from the standardized pin spacing of the base, so that the conventional socket is not attached to the base 3 and erroneous insertion can be prevented. By doing so, an improvement in the withstand voltage between the electrodes can be expected.

As shown in FIG. 2, two luminaires, a ring-shaped fluorescent lamp 1a corresponding to a 32W type and a ring-shaped fluorescent lamp 1b corresponding to a 40W type, are used.

The ring-shaped fluorescent lamp 1a corresponding to the 32W type has a ring outer diameter D1 of the glass bulb 2 of 299 mm, a ring inner diameter D2 when the ring outer diameter D1 is 299 mm, and a tube outer diameter d of 267 mm.
Is 16.5 mm, and the thickness of the glass bulb 2 is 1.1 mm.

The ring-shaped fluorescent lamp 1b corresponding to the 40 W type has a ring outer diameter D1 of the glass bulb 2 of 373 mm, and when the ring outer diameter D1 is 373 mm, the ring inner diameter D2 is 341 mm and the tube outer diameter d is
Is 16.5 mm, and the thickness of the glass bulb 2 is 1.1 mm.

Further, a ring-shaped fluorescent lamp 1c equivalent to a 30W type is used.
Is also applicable, and the ring outer diameter D1 of the glass bulb 2 is 22
When the ring outer diameter D1 is 225 mm, the ring inner diameter D2 is 192 mm, the tube outer diameter d is 16.5 mm, and the glass bulb 2 is 5 mm.
Has a thickness of 1.1 mm.

The inside of the ring-shaped fluorescent lamp 1 shown by a broken line in FIG. 3 is the ring inner diameter of the conventional ring-shaped fluorescent lamp,
The tube outer diameter d 'is 29 mm. That is, the ring-shaped fluorescent lamp 1 of the present embodiment has a smaller tube outer diameter in accordance with the conventional ring outer diameter.

On the inner wall surface of the glass bulb 2 of the ring-shaped fluorescent lamps 1a, 1b, 1c, a three-wavelength correlated color temperature of 5000 k
Is applied and baked to form a phosphor layer.

Reference numeral 11 denotes a tool main body.
The outer shape is circular and thin, and a circular opening 12 is formed in the center in the vertical direction.
A storage section 13 having a storage space is formed around the storage section 13, and an annular step portion 14 in which the annular fluorescent lamps 1 a and 1 b are disposed is formed around the storage section 13. The annular plate portion 15 facing above the step portion 14 is formed in a flat plate shape thinner than the thickness of the storage portion 13 in the height direction.

A pair of sockets 16 for connecting the bases 3 of the two annular fluorescent lamps 1a and 1b are disposed obliquely outward on the step portion 14 of the appliance body 11, and the position of the socket 16 A pair of resin-made or metal-made lamp holders 17 fitted and held on the outer periphery of the glass bulb 2 are arranged at positions symmetrical to the above.

The storage section 13 of the appliance body 11 has an opening 1
2, a socket 18 is provided.
, A baby ball 19 is screw-connected.

Two ring-shaped fluorescent lamps 1a and 1b having different lamp ring diameters are respectively arranged on the annular step portion 14 of the apparatus main body 11, and the base pins 4 projecting from the base 3 are inserted and connected to the socket 16. The glass bulb 2 on the side opposite to the base 3 is held by a lamp holder 17. A baby ball 19 is connected to the socket 18.

In the space of the storage section 13 of the appliance body 11,
A high-frequency lighting circuit 20 including an inverter lighting circuit is provided. An adapter 21 is electrically connected to a power input side of the high-frequency lighting circuit 20 by an electric wire (not shown) or the like, and each socket 16 is electrically connected to an output side by an electric wire or the like.

The high-frequency lighting circuit 20 supplies the ring-shaped fluorescent lamp 1a corresponding to the 32W type to a condition of 38 W of lighting power at a high frequency of 45 kHz, for example, a lamp current of about 430 mA and a lamp voltage of about 88 V, thereby lighting the ring-shaped fluorescent lamp 1a. Let it. In addition, the ring-shaped fluorescent lamp 1b equivalent to the 40 W
The condition that the lamp power is 48 W at a high frequency of kHz, for example, a lamp current of about 430 mA and a lamp voltage of about 111 V is supplied, and the ring-shaped fluorescent lamp 1b corresponding to the 40 W type is turned on. Further, in the case of the ring-shaped fluorescent lamp 1c corresponding to the 30W type, a condition that the lamp power is 28W at a high frequency of 45kHz, for example, the lamp current is about 430mA and the lamp voltage is about 65
V is supplied to turn on the ring-shaped fluorescent lamp 1c corresponding to the 30 W type.

The adapter 21 is formed in a thin disk shape, and is integrally fixed to the instrument main body 11 via a connecting portion (not shown) at a lower portion inside the opening portion 12 of the instrument main body 11. Are connected to the power supply input side of the discharge lamp lighting device 20 by wires or the like wired along. The adapter 21 is electrically connected and mechanically supported by a rectangular hooking seal 22 installed on a ceiling or the like when the device is mounted.

A shade 23 is attached to the tool body 11 so as to cover the lower part and the side of the tool body 11. The shade 23 is made of a translucent milky white material and is formed in a thin shape that protrudes gently with a large arcuate surface downward, and has a mounting portion 24 attached to the instrument body 11 at the periphery.
Are formed.

Next, the operation of the first embodiment will be described.

As shown in FIG. 1, the instrument body 11 is supported on a ceiling surface or the like via an adapter 21 connected to a hooking ceiling 22 installed on the ceiling surface or the like. The main body 11 side and the hooking sealing 22 side are electrically connected.

Ring-shaped fluorescent lamp 1a, 1b (or 1c)
When the light is turned on and the baby ball 19 is turned on, the light emitted from the ring-shaped fluorescent lamps 1a and 1b and the baby ball 19 is transmitted through the shade 23 and illuminated.

Then, the ring-shaped fluorescent lamp 1 equivalent to the 32W type is used.
The ring-shaped fluorescent lamp 1b corresponding to the a and 40W types is lit by supplying a high frequency of 45 kHz and 38W and 48W of lamp power from the high-frequency lighting circuit 20, respectively.
When the ring-shaped fluorescent lamp 1c equivalent to the 30W type is mounted, the high-frequency lighting circuit 20 supplies a high-frequency of 45 kHz and a lamp power of 28W to each of the lamps to light.

The ring-shaped fluorescent lamps 1a, 1b and 1c have a ring outer diameter D which is almost the same as the conventional 32W type, 40W type and 30W type.
Since it is 1, it is possible to make it thinner while keeping the image of the size of the conventional device main body, and to obtain light output almost equivalent to that of the conventional 32 W, 40 W and 30 W ring fluorescent lamps. Obtainable.

FIGS. 4 and 5 are graphs showing experimental results comparing the lamp characteristics of the ring-shaped fluorescent lamps 1a, 1b, 1c of the first embodiment and the conventional ring-shaped fluorescent lamp. FIG. Power (W) and lamp luminous efficiency (lm /
FIG. 5 is a graph showing the relationship between the input power (W) and the total luminous flux (lm).

FIGS. 4 and 5 show the ring-shaped fluorescent lamps 1a and 1b corresponding to the 32W type, and the ring-shaped fluorescent lamps 1 corresponding to the 40W type.
b, c, and d represent conventional ring-shaped fluorescent lamps 32W and 40W.
The values of the W type are shown. Further, e is a ring-shaped fluorescent lamp 1c equivalent to a 30 W type, and f is a conventional ring-shaped fluorescent lamp 3
The values of the 0W type are shown.

Table 1 shows the ring-shaped fluorescent lamps 1a, 1b, 1c used in this experiment and conventional fluorescent lamps (FCL32EX-N / 30, FCL40EX manufactured by Toshiba Lighting & Technology Corporation).
-N / 38, FCL30EX-N / 28). The lighting frequency of each of the ring-shaped fluorescent lamps 1a, 1b, 1c is 45 kHz. The total luminous flux indicates the initial luminous flux when 100 hours have elapsed from the start of lamp lighting.

[Table 1]

In FIG. 4, as can be seen from the curves a, b and e, the ring-shaped fluorescent lamp 1a corresponding to the 32W type has a power of about 23W.
The ring-shaped fluorescent lamp 1b equivalent to the 40W type is about 30W,
The W-shaped ring-shaped fluorescent lamp 1c has a peak in lamp efficiency at about 18 W, and the lamp efficiency is higher than that of the conventional 32 W, 40 W, and 30 W ring fluorescent lamps.

In FIG. 5, as can be seen from the lines a, b, and e, the total luminous flux is higher than that of the conventional ring-shaped fluorescent lamps of the 32 W, 40 W and 30 W types, and the total luminous flux increases as the input power to the lamp increases. You can see that it increases. However, considering the lamp efficiency, the ring-shaped fluorescent lamp 1 equivalent to the 32 W type
a is about 38 W, the ring-shaped fluorescent lamp 1 b corresponding to the 40 W type is about 48 W, and the ring-shaped fluorescent lamp 1 c corresponding to the 30 W type is about 2 W
It can be seen that by performing rated lighting at 8 W, high-output lighting is possible while satisfying actual use conditions.

The lamp power of the annular fluorescent lamp 1a is 23 W
Then, the efficiency becomes 94.8 lm / W, which is 32
The power can be saved by significantly improving from 83.7 lm / W of the W-shaped annular fluorescent lamp, and the initial light flux can be set to a light output level which is not much different from the conventional 2510 lm, which is 2180 lm.

When the lamp power of the ring-shaped fluorescent lamp 1a is 38 W, the initial luminous flux is 3250 lm, which is remarkably higher than that of the conventional 32 W-type ring-shaped fluorescent lamp of 2510 lm, so that the output can be increased and the efficiency can be increased. Can also be set to about the same level as 85.5 lm / W compared to the conventional 83.7 lm / W.

Further, assuming that the lamp power of the ring-shaped fluorescent lamp 1a is 27 W, the initial luminous flux is 2510 lm, which is equivalent to that of the conventional 32 W-type ring-shaped fluorescent lamp.
Efficiency is 93.0 lm / W against the conventional 83.7 lm / W.
W can be greatly improved.

The lamp power of the annular fluorescent lamp 1b is reduced to 30 W
Then, the efficiency becomes 95.3 lm / W, which is 40% of the conventional value.
The power can be saved by significantly improving from 86.1 lm / W of the W-shaped ring-shaped fluorescent lamp, and the light output level can be set to 2860 lm, which is not much different from the conventional 3270 lm.

If the lamp power of the ring-shaped fluorescent lamp 1b is set to 48 W, the initial luminous flux is 4250 lm, which is remarkably improved from 3270 lm of the conventional 40 W-type ring-shaped fluorescent lamp, and the output can be increased. Can be set to a level substantially equal to 88.5 lm / W compared to the conventional 86.1 lm / W.

Further, when the lamp power of the ring-shaped fluorescent lamp 1b is 34 W, the initial luminous flux is 3270 lm, which is equivalent to that of the conventional 40 W-type ring-shaped fluorescent lamp.
The efficiency is 96.2 lm / W against the conventional 86.1 lm / W.
W can be greatly improved.

The lamp power of the ring-shaped fluorescent lamp 1c is 17 W
Then, the efficiency becomes 91.8 lm / W, which is 30
Power can be saved by significantly improving the W-shaped fluorescent lamp from 75.0 lm / W.

When the lamp power of the ring-shaped fluorescent lamp 1c is 28 W, the initial luminous flux is 2300 lm, which is remarkably improved from 2100 lm of a conventional 30 W-type ring-shaped fluorescent lamp designed to have a relatively high output. And the efficiency is 75.0 lm / W of the conventional type.
To 82.0 lm / W.

Further, when the lamp power of the ring-shaped fluorescent lamp 1c is set to 20 W, the initial luminous flux can be made 1800 lm, which is close to the conventional 2100 lm designed to have a relatively high output, and the efficiency is 75.0 lm / W. To 90.0 lm / W.

That is, the annular fluorescent lamps 1a, 1b, 1
In the case of c, since the tube outer diameter is smaller than that of the conventional ring-shaped fluorescent lamp, the device can be made thinner, the appearance of the device can be improved, and the feeling of pressure can be reduced. Power saving or high output can be achieved as compared with the case where a lamp is used.

In the first embodiment, a two-lamp apparatus using two ring-shaped fluorescent lamps 1a, 1b (or 1c) has been described. However, each ring-shaped fluorescent lamp 1a, 1b,
The same operation and effect can be obtained even when used for a single lamp using any one of 1c or a multiple lamp appliance using each of them.

FIGS. 6 (a), (b), (c) and FIG. 7 show a second embodiment of the present invention, and FIGS. 6 (a), (b), (c)
FIG. 7 is a plan view of the annular fluorescent lamp 1a, 1b or 1c, and FIG.
FIG. 4 is a characteristic diagram showing a relationship between ambient temperature and relative illuminance.

The annular fluorescent lamps 1a and 1a shown in FIG.
In the case of b or 1c, an amalgam 31 for controlling the mercury vapor pressure is sealed and fixed at an internal position of the exhaust pipe 2a provided at the end of the glass bulb 2, that is, in the vicinity of the electrode. The amalgam 31 is made of bismuth (Bi) -tin (Sn) -mercury (Hg), and has a mercury content of about 4%.

The annular fluorescent lamps 1a and 1a shown in FIG.
In b or 1c, the amalgam 31 is sealed and fixed in the vicinity of the sealing portion at the end of the glass bulb 2, that is, in the vicinity of the electrode.

The annular fluorescent lamps 1a and 1a shown in FIG.
In the case of b or 1c, the amalgam 31 is movably sealed in the glass bulb 2.

The curve g in FIG. 7 shows the characteristics of the ring-shaped fluorescent lamp 1a, 1b or 1c enclosing amalgam, and the curve h
Shows the characteristics of the ring-shaped fluorescent lamp 1a or 1b in which pure mercury is sealed. As is clear from this graph, the inclusion of amalgam gives a high relative illuminance even at a higher ambient temperature, and shows a peak value of the relative illuminance when the ambient temperature is about 30 to 40 ° C.

FIGS. 8 and 9 are a partially enlarged front view and a partially enlarged side view showing a third embodiment of the present invention.

The base 3 is formed of a hollow resin member and has a substantially cylindrical shape. The base 3 is divided into two parts with a surface along the central longitudinal direction as a boundary, and FIG. 8 shows the inside of one base provided with a base pin (not shown) on the outside. A glass bulb 2 is provided on the inner peripheral surface of the base 3.
A rib 3a approaching or abutting on the end of the exhaust pipe 2a projects in a direction perpendicular to the inner peripheral surface at a height that does not contact the exhaust pipe 2a.

Reference numeral 3b denotes an engagement projection which is engaged with a small-diameter portion having a node-like shape formed near the end of the glass bulb 2, and prevents the glass bulb 2 from being detached from the base 3.

A pin forming portion 3c is formed at the center of the base 3, and lead wires led out from both ends of the glass bulb are connected to the conductive portions of the base pins provided in the pin forming portion 3c. .

In the present embodiment, when the annular fluorescent lamp 1 is handled, for example, the glass bulb 2 is deformed in a direction in which the two ends approach each other beyond the engagement of the engagement projections 3b, and the exhaust pipe 2a is connected to the pin forming portion. 3c to prevent breakage.

It has been found that, as in the above-described embodiment, when the tube diameter is smaller than in the conventional case, the glass bulb 2 is more likely to bend in the direction in which the two end portions approach each other. Therefore, by forming the rib 3a as in the present embodiment, the end of the glass bulb 2 does not largely move to the pin forming portion 3c side.

The rib 3 may be provided only on the side where the exhaust pipe 3a is located, or may be provided on the other side.

FIG. 10 is a partially enlarged front view showing a fourth embodiment of the present invention. The base 3 has a diameter of about 2-3m
m of ventilation holes 3d are formed. An exhaust pipe 2a of the glass bulb 2 is formed at a projection position of the vent 3d so as to protrude by about 1 mm. The shape of the vent 3d is not limited, such as a circular shape or a slit shape. Although not shown, a similar vent hole is also provided in a portion of the base 3 on the opposite side,
With a pair of opposed ventilation holes, the cooling effect is further improved.

According to this embodiment, it is possible to effectively cool the end of the exhaust pipe 2a or the end of the glass bulb 2 by the ventilation hole 3d to form the coolest part, and to approach the desired temperature. Efficiency can be further improved.

[0109]

According to the ring-shaped fluorescent lamp of the present invention, while the ring-shaped outer diameter is almost the same as that of the conventional ring-shaped fluorescent lamp, the tube outer diameter is small, and the same or higher efficiency or brightness can be secured. Therefore, it is possible to reduce the thickness of the device while keeping the image of the size of the conventional device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a lighting device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the lighting fixture of the embodiment.

FIG. 3 is a plan view of the annular fluorescent lamp of the embodiment.

FIG. 4 is a graph comparing the relationship between input power (W) and lamp luminous efficiency (lm / W) between the above embodiment and a conventional ring-shaped fluorescent lamp.

FIG. 5 is a graph comparing the relationship between the input power (W) and the total luminous flux between the embodiment and the conventional ring-shaped fluorescent lamp.

FIG. 6 is a plan view of a ring-shaped fluorescent lamp according to a second embodiment of the present invention.

FIG. 7 is a characteristic diagram illustrating a relationship between an ambient temperature and relative illuminance in the embodiment.

FIG. 8 is a partially enlarged and exploded front view showing a third embodiment of the present invention.

FIG. 9 is an enlarged side view of a part of the embodiment.

FIG. 10 is a partially enlarged front view showing a fourth embodiment of the present invention. 1a, 1b, 1c: annular fluorescent lamp, 2: glass bulb, 11: appliance body, 20: lighting circuit, 31: amalgam.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Sakakibara 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside Toshiba Lighting & Technology Corporation (72) Inventor Toshiharu Yagi 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo No. Toshiba Litec Co., Ltd.

Claims (16)

[Claims] 1. An annular glass having a ring outer diameter of 285 to 310 mm, a tube outer diameter of 15 to 18 mm, and a wall thickness of 0.8 to 1.2 mm made of soda lime glass and having a phosphor applied to an inner surface thereof. 20. a bulb; mercury and a rare gas sealed in the glass bulb; and a pair of electrode means sealed at both ends in the glass bulb so as to generate a discharge in the glass bulb. A ring-shaped fluorescent lamp configured to be operated at a lamp power within a range of 40 W and at a high frequency of 10 kHz or more. 2. The ring-shaped fluorescent lamp according to claim 1, wherein the rated lamp power is 23 W and the lamp power with high output characteristics is 38 W. 3. The ring-shaped fluorescent lamp according to claim 1, wherein the rated lamp power is 27 W and the lamp power with high output characteristics is 38 W. 4. An annular glass made of soda-lime glass having a ring outer diameter of 365 to 390 mm, a tube outer diameter of 15 to 18 mm, and a wall thickness of 0.8 to 1.2 mm, and having a phosphor applied to an inner surface thereof. A bulb; mercury and a rare gas sealed in the glass bulb; and a pair of electrode means sealed at both ends in the glass bulb so as to generate a discharge in the glass bulb. A ring-shaped fluorescent lamp configured to be operated at a lamp power within a range of 50 W and at a high frequency of 10 kHz or more. 5. The ring-shaped fluorescent lamp according to claim 4, wherein the rated lamp power is 30 W and the lamp power of high output characteristics is 48 W. 6. The ring-shaped fluorescent lamp according to claim 4, wherein the rated lamp power is constituted by 34 W and the lamp power having high output characteristics is constituted by 48 W. 7. An annular glass made of soda lime glass having a ring outer diameter of 210 to 235 mm, a tube outer diameter of 15 to 18 mm, and a wall thickness of 0.8 to 1.2 mm, and having a phosphor applied to an inner surface thereof. A bulb; mercury and a rare gas sealed in the glass bulb; and a pair of electrode means sealed at both ends in the glass bulb so as to generate a discharge in the glass bulb. A ring-shaped fluorescent lamp which is configured to be lit at a lamp power within a range of 30 W and at a high frequency of 10 kHz or more. 8. The ring-shaped fluorescent lamp according to claim 7, wherein the rated lamp power is 17 W and the lamp power of high output characteristics is 28 W. 9. The ring-shaped fluorescent lamp according to claim 7, wherein the rated lamp power is 20 W and the lamp power with high output characteristics is 28 W. 10. The phosphor has a peak wavelength of about 450 n.
10. The annular fluorescent lamp according to claim 1, wherein the fluorescent lamp is of a three-wavelength emission type having a wavelength of about 540 nm and about 610 nm. 11. A protective layer comprising metal oxide fine particles is formed on the inner surface of a glass bulb, and a phosphor is applied on the protective layer. Ring fluorescent lamp. 12. The ring-shaped fluorescent lamp according to claim 1, wherein amalgam is provided near the electrode means. 13. The apparatus according to claim 1, further comprising an amalgam movably accommodated in a glass bulb.
12. The ring-shaped fluorescent lamp according to any one of items 11 to 11. 14. An apparatus main body; and a ring-shaped fluorescent lamp according to any one of claims 1 to 13 disposed on the apparatus main body;
High frequency of 10 kHz or more and 1
A high-frequency lighting circuit for supplying 7 to 50 W of lamp power;
A lighting fixture comprising: 15. An apparatus main body; an annular fluorescent lamp selected from at least two of claims 1, 4 and 7 disposed on the apparatus main body;
a lighting circuit for supplying a lamp power of 17 to 50 W at a high frequency of not less than z and a lighting power of 17 to 50 W. 16. An apparatus main body; an annular fluorescent lamp according to claim 2 or 3 disposed on the apparatus main body; an annular fluorescent lamp according to claim 5 or 6 disposed on the apparatus main body; A ring-shaped fluorescent lamp according to claim 8 or 9, which is provided; lighting power is supplied to the ring-shaped fluorescent lamp at a high frequency of 10 kHz or more, and it is possible to switch between a rated lamp power and a lamp power having high output characteristics. A lighting circuit having a switching means.