JPH06310098A - Variable color electric discharge lamp equipment - Google Patents

Abstract

PURPOSE:To provide such variable color electric discharge lamp equipment that colors of rays can be adjusted and also there can be no need to form plural electric discharging paths. CONSTITUTION:An electric discharge lamp in variable color electric discharge lamp equipment has its bulb 1 provided with paired first electrodes 2 arranged at such a distance from each other as to generate a positive column sufficiently longer in size than a negative glow, and paired second electrodes 3 arranged at a distance corresponding to not more than twice the length of the negative glow from each other. The bulb 1 has a phosphor layer 4 formed on the internal circumferential surface of its wall, and also has mercury vapor and a rare gas respectively filled thereinto. Ultraviolet rays radiated from mercury in the positive column between the electrodes 2 are converted respectively into visible ones by the phosphor layer 4, while visible rays are radiated from the rare gas in the negative glow generated between the electrodes 3. Upon this, the luminous color of the phosphor layer 4 is differentiated from that of the negative glow, and then quantities of the rays radiated respectively from both mercury and the rare gas are adjusted so that the colors of the rays can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable color discharge lamp device capable of color matching using a discharge lamp which utilizes the luminescence of a fluorescent substance such as a fluorescent lamp.

[0002]

2. Description of the Related Art Conventionally, as a variable color discharge lamp device in which the emission color is variable, there is known a device described in Japanese Patent Publication No. 4-48584 shown in FIG. In this variable color discharge lamp device, fluorescent lamps 24a, 24b for emitting red, green, and blue (hereinafter abbreviated as R, G, and B respectively) emission colors are provided.
An instrument main body 24 including 24b, 24c is provided, and the lighting circuit 2 supplies power to each fluorescent lamp 24a, 24b, 24c.
It is individually controlled by 5a, 25b and 25c. In the lighting circuits 25a, 25b, 25c, the duty control circuit 2
The power supply period for each fluorescent lamp 24a, 24b, 24c per cycle is set based on the outputs of 6a, 26b, 26c. Here, the duty control circuits 26a, 26
In b and 26c, the data stored in the dimming ratio memory 27 is read and the ratio of the output luminous flux of each fluorescent lamp 24a, 24b and 24c is adjusted to adjust the color of the mixed color light. The data stored in the dimming ratio memory 27 is specified by the address signal generated from the switch input unit 28 by operating the switch 29. Therefore, when the switch 29 is operated, the data stored in the dimming ratio memory 27 is sequentially read, and the light color of the mixed color light gradually changes.

On the other hand, two kinds of light emitting gases having different excitation energy levels are enclosed in one bulb, and as shown in FIG. 26, the two kinds of light emitting gases are selectively emitted in the bulb 21. A configuration in which the electrodes 22a and 22b are arranged so that they are arranged is also considered (Japanese Patent Publication No. 61-248350). With this configuration, since two colors of light can be emitted, it is possible to adjust colors by changing the mixing ratio of the two colors.

Further, Japanese Patent Publication No. 2-244 shown in FIG.
As in the configuration of Japanese Patent No. 553, a plurality of inner pipes 23a, 23b, 23c are provided in the valve 1, and each inner pipe 23a, 2
3b and 23c are opened at one end into the inner space of the valve 21, and anodes 32a, 32b and 32c are provided inside the other ends of the inner pipes 23a, 23b and 23c, respectively. A configuration is also considered in which a common electrode 31d that forms an electrode pair with each of the anodes 32a, 32b, and 32c is provided in the outer space of 23a, 23b, and 23c. The inner peripheral surfaces of the inner tubes 23a, 23b, 23c are coated with fluorescent materials having different emission colors, and the anodes 32
By adjusting the ratio of the light emitting period in the discharge path formed between each of the a, 32b, 32c and the common cathode 31, it is possible to adjust the color only by using one bulb 21. . That is, in the configuration shown in FIG. 25, an independent valve is used, whereas in the configuration shown in FIG. 27, only one valve 21 is used for variable color.

[0005]

In the conventional configuration shown in FIG. 25, the circuit configuration is complicated because the light output ratio of the plurality of fluorescent lamps 24a, 24b, 24c is adjusted, and the fluorescent lamps 24a, 24b, Since a plurality of 24c are required, there is a problem that the entire apparatus becomes large and the cost increases.

On the other hand, in the conventional configuration shown in FIG. 26, since only one valve 21 is used, the size of the entire device can be reduced, but two types having different excitation energy levels can be used. Since the light emission expectation is used, it is difficult to supply proper energy and control is difficult. Further, in the conventional configuration shown in FIG. 27, since one valve 21 is used, the size of the entire device can be reduced as compared with the configuration of FIG. 25, but the valve 21 having a special shape is required. Therefore, it is difficult to manufacture, and the anodes 32a, 32b corresponding to the discharge paths formed inside the inner tubes 23a, 23b, 23c are formed in the same manner as the conventional configuration shown in FIG. 32c and common cathode 3
Since the ratio of the time to generate the discharge is adjusted between 1 and 1, there is a problem that the circuit configuration becomes complicated.

The present invention is intended to solve the above problems, and it is possible to perform color adjustment with a single discharge lamp, and it is not necessary to provide a plurality of discharge paths for color adjustment. An object of the present invention is to provide a variable color discharge lamp device that is easy to control.

[0008]

In order to achieve the above object, the first aspect of the present invention is arranged so as to be spaced apart to the extent that a positive column sufficiently longer than the length of the negative glow is generated. The bulb is provided with a second electrode pair that is spaced apart by not more than twice the length of the negative glow and a negative electrode, and a discharge lamp having a fluorescent substance built in the bulb is provided. In the first light emitting gas that emits light that is ionized and excited in the positive column generated between the electrode pair and converted into visible light by the fluorescent substance, and in the negative glow generated between the second electrode pair A second light emitting gas that emits visible light of a wavelength different from the visible light from the fluorescent substance when ionized / excited is enclosed, and power is supplied so that discharge is generated in each of the first electrode pair and the second electrode pair. At least one of a first electrode pair and a second electrode pair Characterized in that it comprises a for toning device adjusting the feeding power.

The invention of claim 2 is characterized in that the second electrode pair is formed by attaching a conductor to the outer peripheral surface of the tube wall of the valve. According to a third aspect of the present invention, the second electrode pair is composed of a plurality of electrodes having substantially the same area and spaced apart from each other through a slit, the valve has a tubular shape, and the slit has a centerline direction of the valve. The length of the slit in the extending direction is set to be longer than the length of the valve in the direction of the center line.

The invention of claim 4 is characterized in that a plurality of second electrode pairs are provided. The invention of claim 5 is characterized in that the surfaces of the bulb on which the second electrode pairs are provided are substantially parallel to each other. According to a sixth aspect of the present invention, the power supply device periodically supplies power to the second electrode pair, and the power supply device periodically supplies about half the time from the start of each power supply until the output light flux from the negative glow reaches the peak value. It is characterized by being formed as a cycle.

The invention of claim 7 is characterized in that the fluorescent substance is adhered to the inner peripheral surface of the bulb, and at least one of the emission color and the thickness differs depending on the location of the bulb. According to the invention of claim 8, the second electrode pair comprises a plurality of electrodes,
The power supply device is characterized by including switching means for supplying power between desired electrodes among the electrodes forming the second electrode pair.

The invention of claim 9 is characterized by comprising temperature varying means for regulating the temperature in the valve. The invention according to claim 10 is characterized in that the fluorescent lamp having a white emission color and the discharge lamp are provided in one instrument body. The invention according to claim 11 is characterized in that a heating power supply circuit for heating by energizing each electrode of the second electrode pair is provided.

According to a twelfth aspect of the present invention, a third electrode pair attached to the valve and a high-frequency generation circuit for applying a high-frequency voltage to the third electrode pair to cause a high-frequency electric field to act in the valve are added. It is characterized by The invention of claim 13 is
It is characterized in that an induction coil arranged in the vicinity of the valve and a high frequency generation circuit for supplying a high frequency current to the induction coil to cause a high frequency electromagnetic field to act in the valve are added.

According to a fourteenth aspect of the present invention, one pole of the second electrode pair is shared with the electrode of the first electrode pair, and the other pole of the second electrode pair is grounded. The invention of claim 15 is characterized in that the second electrode pair is disposed inside the bulb. The invention of claim 16 is characterized in that the second electrode pair is sandwiched between the coating layer formed of an insulating material and the outer peripheral surface of the bulb wall of the valve.

According to a seventeenth aspect of the present invention, the valve is a multiple pipe having a plurality of pipes having different diameters with a common center.
It is characterized in that the first electrode pair is provided in the tubular body having the minimum diameter, and the second electrode pair is provided over substantially the entire facing surface between the tubular bodies. According to the invention of claim 18, a partition body is provided for partitioning the internal space of the bulb into a plurality of independent spaces, and the light emitting space by the discharge at the first electrode pair and the light emitting space by the discharge at the second electrode pair are provided. It is characterized in that each space is separated by a partition.

The invention of claim 19 is characterized in that the second light emitting gas is a mixed gas of a plurality of kinds of gases having different emission colors.

[0017]

According to the first aspect of the present invention, two kinds of light emitting gas are enclosed in the bulb so that the light emitting color of the fluorescent substance due to luminescence and the light emitting color of the light emitting gas in the negative glow are made different from each other. By doing so, two emission colors of the emission color of the fluorescent material and the emission color of negative glow can be obtained from one discharge lamp. Here, in the bulb, the first electrode pair and the negative electrode, which are arranged so as to be spaced apart from each other so as to generate a positive column that is sufficiently longer than the length of the negative glow, are spaced apart from each other by not more than twice the length of the negative glow. By providing the provided second electrode pair, it is possible to obtain a large amount of negative glow while at the same time sufficiently forming a positive column necessary for causing the fluorescent substance to emit light. By adjusting the applied voltage between the pair of electrodes and the pair of second electrodes, it is possible to adjust the light quantity ratio between the emission color due to the luminescence of the fluorescent material and the emission color of the negative glow, and toning the mixed color light. Is possible.

The invention of claim 2 is an embodiment relating to the second electrode pair, wherein the conductor is attached to the outer peripheral surface of the tube wall of the valve to form the second electrode pair. Pairs can be easily provided. In the invention of claim 3, the slit formed between the second electrode pair is extended in a direction inclined with respect to the center line direction of the bulb, and the length of the slit in the extension direction is the center of the bulb. By setting the length longer than the line length, the region where the negative glow occurs in the internal space of the bulb can be widened, and the light flux from the negative glow that generally emits less light can be relatively large. .

According to the fourth aspect of the invention, the second electrode pair includes a plurality of pairs of electrodes, and a negative glow is generated between each pair of electrodes so that a relatively large area of the internal space of the valve is provided. As a result, a negative glow can be formed, and as a result, the amount of light emitted by the negative glow can be made relatively large. In the invention of claim 5, since the surfaces of the bulb on which the second electrode pairs are provided are substantially parallel to each other, negative glow can be generated over substantially the entire surface between the second electrode pairs. Therefore, the amount of light emitted from the negative glow can be made relatively large.

In the invention of claim 6, power is periodically supplied to the second electrode pair, and about half the time from the start of each power supply until the output light flux from the negative glow reaches the peak value is half. Since the period is set, only the period in which the negative glow emission amount is large is used, and the negative glow emission amount can be increased. In the invention of claim 7, the fluorescent substance is deposited on the inner peripheral surface of the bulb, and at least one of the emission color and the thickness is made different depending on the location of the bulb. Since the positive column between the two moves in the bulb according to the polarity of the voltage applied to the second electrode pair, the polarity of the voltage applied to the second electrode pair is adjusted when the emission color of the fluorescent substance is different. As a result, it becomes possible to adjust the light color obtained by mixing the emission colors of the fluorescent substances, and a mixture of three or more emission colors can be obtained together with the emission color of the negative glow, so that the range of toning can be expanded. it can. Further, when the thickness of the fluorescent substance is different, it becomes possible to adjust the light emission by adjusting the light emission amount for each place.

According to the eighth aspect of the invention, when the second electrode pair comprises a plurality of electrodes, power is supplied between the desired electrodes by the power supply device, so that the amount of emission of the negative glow is changed according to the distance between the electrodes. It is possible to adjust, and as a result, the adjustment range of the emission amount of the negative glow is widened, and the range of toning is expanded. According to the ninth aspect of the present invention, since the temperature varying means for adjusting the temperature inside the bulb is provided, it becomes possible to adjust the emission color by adjusting the temperature. In other words, it means that color adjustment means by adjusting the temperature was added,
The range of toning can be expanded.

According to the tenth aspect of the invention, when a fluorescent lamp whose emission color is white is provided together with the bulb in one instrument main body, when white-based mixed light is obtained,
The main light flux is secured by the fluorescent lamp, and the color of the light emitted from the bulb is mixed to correct the light color. Therefore, compared to the case where white light is mixed with the bulb alone, the color mixture is improved. The unevenness can be reduced and the luminous efficiency can be improved.

In the eleventh aspect of the present invention, each electrode of the second electrode pair is heated by being energized. Therefore, if the second electrode pair is heated at the time of starting, the electronic motion inside the valve is activated to improve the startability. Can be improved. According to the twelfth aspect of the present invention, a high frequency voltage is applied to the third electrode pair attached to the valve to cause a high frequency electric field to act in the valve. Can be activated to improve the startability.

In the thirteenth aspect of the present invention, since the induction coil is arranged close to the valve and a high frequency current is passed through the induction coil to apply a high frequency electromagnetic field to the internal space of the valve,
If a high-frequency electromagnetic field is generated at the time of starting, the electronic motion inside the valve can be activated to improve the startability. In the invention of claim 14, one electrode of the second electrode pair is shared with the first electrode pair and the other electrode of the second electrode pair is grounded. Therefore, the electrode on the outer peripheral surface of the valve is connected to the ground side. If the electrode is used, there is no electric shock even if it touches the bulb, and safety is enhanced.

According to the fifteenth aspect of the invention, since the second electrode pair is arranged inside the valve, no electric shock is caused even if the valve is touched, and the safety is improved. In the invention of claim 16, the second electrode pair is sandwiched between the coating layer made of an insulating material and the outer peripheral surface of the bulb wall of the valve,
The presence of the coating layer prevents direct contact with the second electrode pair, resulting in prevention of electric shock and higher safety.

In the seventeenth aspect of the present invention, the first electrode pair is provided in the tubular body having the smallest diameter by using the valve formed of the multiple tubes having the plurality of tubular bodies having the common center and different diameters, and each tubular body is provided. Since the second electrode pair is provided over substantially the entire opposing surface between them, the positive column and the negative glow are generated in the spaces separated from each other, and the positive column and the negative glow are generated. Control becomes easier, and as a result, dimming control becomes easier. Moreover, since the second electrode pair is provided over substantially the entire opposing surface of the tubular body, negative glow can be generated over substantially the entire circumference in the circumferential direction of the valve, and the color mixing property is improved. Of.

In the eighteenth aspect of the present invention, a transparent partition wall for partitioning the internal space of the bulb into a plurality of spaces is provided, and the light emission space by the discharge of the first electrode pair and the light emission by the discharge of the second electrode pair. Since the space is a separate space separated by a partition wall, when viewed from the direction crossing the partition wall, negative glow will occur over the entire surface, and high color mixing in a specific direction can be obtained. Moreover, since the positive column and the negative glow are generated in different spaces, the toning control becomes easy.

In the nineteenth aspect of the present invention, the second light emitting gas is a mixed gas of a plurality of kinds of gases having different emission colors, so that the emission color of the negative glow can be used as the mixed color light to widen the toning range. it can.

[0029]

【Example】

(Embodiment 1) In this embodiment, as shown in FIG. 1, first electrodes 2 are provided in both end portions in the direction along the center line of a straight tube-shaped valve 1, and the center line of the valve 1 is included. The second electrode 3 is fixed to each of the outer surfaces of the tube wall of the bulb 1 with the two surfaces sandwiched therebetween to form the discharge lamp A. As the electrode 3, a transparent electrode or an electrode having a light transmitting property is used. A fluorescent layer 4 coated with a fluorescent substance is formed on the inner peripheral surface of the bulb 1 of the bulb 1. Mercury vapor and a rare gas are enclosed as light emitting gases in the bulb 1, and the fluorescent layer 4 excites mercury vapor. Converts the ultraviolet light generated when you do into visible light. For example, when the fluorescent layer 4 containing calcium halophosphate as a main component is used, it is possible to convert ultraviolet rays generated when mercury vapor is excited and ionized into white visible light. Also,
If neon is used as the rare gas, a reddish emission color can be obtained in the negative glow. An alternating voltage is applied to the electrodes 2 and 3 by lighting circuits 5 and 6 which are individual power supply devices. At least one of the two lighting circuits 5 and 6 is capable of adjusting either the voltage or the frequency, and this adjusting means functions as a color adjusting means.

By the way, the distance L ₁ between both electrodes 2 is set so that the length of the positive column is sufficiently longer than the length of the negative glow when discharge occurs between both electrodes 2. In addition, the distance L ₂ (corresponding to the outer diameter of the valve 1) at the most distant portion between the electrodes 3 is set sufficiently shorter than the distance L ₁ between the electrodes 2. Here, the length L _{3 of the} negative glow formed between the second electrodes ₃ (see FIG. 2)
Is known to be related to the pressure of the enclosed gas in the valve 1, for example, neon in the valve 1 is 1.5
Assuming that ~ 2.0 Torr is enclosed, the length of the negative glow is 4 to 5 cm. Further, the higher the pressure of the enclosed gas in the bulb 1, the higher the light emission intensity, but on the contrary, the length of the negative glow becomes shorter. Therefore, the diameter of the bulb 1 is 3 to 4 c.
At m (about the diameter of a general fluorescent lamp), when the pressure of the enclosed gas exceeds 5 Torr, a Faraday dark portion F is generated in the area surrounded by the negative glow G, as shown in FIG. When the pressure of the enclosed gas becomes higher, a positive column also occurs.

Therefore, the distance L ₂ between the second electrodes 3 is set to not more than twice the length L ₃ of the negative glow G so that the luminous efficiency from the negative glow becomes the highest. That is,
L ₂ ≦ 2L ₃ and L ₂ << L ₁ are set. Under such conditions, without forming the Faraday dark portion F,
Negative glow G can be generated over substantially the entire area between both electrodes 3.

In the above structure, when an AC voltage is applied between the first electrodes 2 by the lighting circuit 5, mercury vapor is ionized and excited by the discharge generated between the two electrodes 2 to generate ultraviolet rays. This ultraviolet ray is converted into visible light by the fluorescent layer 4 and emits a white light output to the outside of the bulb 1. In addition, when an AC voltage is applied between the second electrodes 3 by the lighting circuit 6, a negative glow G is generated by the discharge generated between the two electrodes 3, so that the rare gas (neon) is ionized and excited by the negative glow G. Reddish light is emitted to the outside of the bulb 1. That is, mixed color light of white and red can be obtained. Here, the lighting circuits 5 and 6
By adjusting at least one of the output voltage, the frequency, and the ON period within one AC cycle, the fluorescent layer 4 and the negative glow G
The output light flux of at least one of the white light and the red light is changed, and as a result, it is possible to change the color mixture ratio of the emission colors of the white light and the red light. It is possible to adjust the color of mixed color light.

In the above embodiment, calcium halophosphate is used as the fluorescent substance forming the fluorescent layer 4 and mercury vapor and neon are used as the light emitting gas, but these are not intended to be limiting and other substances may be used. Of course it is okay. Furthermore, the rare gas as the light emitting gas is not limited to one type, and may be a mixed gas of a plurality of types, and the rare gas may not necessarily be used as the light emitting gas.

(Embodiment 2) In this embodiment, as shown in FIG. 3, a slit 7 formed between a pair of second electrodes 3 is inclined with respect to the center line of the bulb 1. . Here, the slit 7 is formed on a line intersecting with the pipe wall of the valve 1 and a plane that intersects the center line of the valve 1 and passes through a corner between the peripheral surface and the end surface of the valve 1. I am doing it. By providing the second electrode 3 so as to sandwich the slit 7 as described above, the length L ₄ of the slit 7 becomes longer than the length L ₀ of the bulb 1 (that is, L ₄ >).
L ₀ ). Since the negative glow between the electrodes 3 occurs in the vicinity of the slit 7 between the electrodes 3, the slit 7 is longer than that in the first embodiment, so that the output luminous flux from the negative glow becomes larger than that in the first embodiment. Of. Other configurations are similar to those of the first embodiment. In FIG. 3, the first electrode 2 and the lighting circuit 5 are omitted.

(Embodiment 3) In this embodiment, as shown in FIG. 4, a slit 7 is formed between a pair of second electrodes 3.
Is tilted with respect to the center line of the valve 1 as in the second embodiment. However, the slit 7 is formed so as to be spirally wound around the center line of the bulb 1. With this configuration, the length of the slit 7 can be made longer than that in the second embodiment. As a result, the output light flux from the negative glow is further increased as compared with the second embodiment. Other configurations are similar to those of the first embodiment. Figure 4
Then, the first electrode 2 and the lighting circuit 5 are omitted.

(Embodiment 4) In this embodiment, as shown in FIG. 5, a slit 7 formed between a pair of second electrodes 3 is formed.
However, both ends of a plurality of line segments along the center line of the valve 1 are sequentially connected by line segments included in a plane orthogonal to the center line of the valve 1 to form a meandering crank shape. Even with such a shape, the length of the slit 7 can be formed longer than that in the second embodiment. As a result, the output light flux from the negative glow is further increased as compared with the second embodiment. Other configurations are similar to those of the first embodiment. In FIG. 5, the first
The electrode 2 and the lighting circuit 5 are omitted.

(Embodiment 5) In the above embodiment, the second electrode 3 is used.
Although only one pair is provided, a plurality of pairs (4 pairs) of second electrodes 3 are provided as shown in FIG. 6 in this embodiment. That is, eight electrodes 3 are provided on the outer peripheral surface of the bulb wall of the bulb 1 in the circumferential direction, and an alternating voltage is applied between the pair of adjacent electrodes 3 by the lighting circuits 6a to 6d. In this configuration, the number of the electrodes 3 for generating the negative glow is increased, so that the area of the negative glow in the bulb 1 can be increased and the output light flux from the negative glow can be increased. Other configurations are similar to those of the first embodiment. Here, although four pairs of electrodes 3 are provided in FIG. 6, the number of pairs may be three, or five or more.

(Embodiment 6) In this embodiment, as shown in FIG. 7, one lighting circuit 6 shares the lighting circuits 6a to 6d provided for each pair of electrodes 3 in the fifth embodiment. Is. That is, one output of the lighting circuit 6 is connected to the bulb 1
Every other electrode 3 connected in the circumferential direction of the tube wall is connected, and the other output is connected to the remaining electrodes 3. Other configurations are similar to those of the fifth embodiment.

(Embodiment 7) In this embodiment, as shown in FIG. 8, the inner valve 1a and the outer valve 1b, which are spherical and have different diameters, are arranged inside and outside with their centers aligned. An example in which 1 has a double structure is shown. A second electrode 3 which is a transparent electrode or an electrode having translucency is provided on the outer peripheral surface of the inner bulb 1a and the inner peripheral surface of the outer bulb 1b, respectively.
Is put on. In the inner space of the inner valve 1a, a pair of first
The electrodes 2 of are separated from each other. An alternating voltage is applied between the electrodes 2 so as to excite and ionize mercury vapor by the lighting circuit 5 to emit ultraviolet rays, and the ultraviolet rays are converted into visible light by the fluorescent layer 4. An alternating voltage for exciting and emitting rare gas is applied between the electrodes 3 by the lighting circuit 6, and the emission color of the rare gas due to negative glow is emitted from the space between the inner bulb 1a and the outer bulb 1b. It has become so. Although the outer valve 1b is illustrated as being open in FIG. 8, it goes without saying that the outer valve 1b is hermetically sealed.

In the above-mentioned structure, the distance between the electrodes 3 can be set without being restricted by the distance between the electrodes 2. That is, the distance of the electrode 3 is substantially equal to the difference between the outer diameter of the inner valve 1a and the inner diameter of the outer valve 1b. Moreover, since the electrode 3 is formed over substantially the entire surface from which the light flux is extracted, it is possible to increase the light emitting area due to the negative glow, and the output light flux from the electrode 3 can be increased.
Other configurations are similar to those of the first embodiment.

(Embodiment 8) In this embodiment, as shown in FIG. 9, the valve 1 is formed in a cylindrical shape having a short center line. The electrodes 2 are arranged apart from each other in the diameter direction of the bulb 1,
The electrodes 3 are provided on both bottom surfaces of the bulb 1 so as to cover the entire bottom surfaces. That is, the electrode 3 in the bulb 1
The surfaces on which are provided are parallel to each other.

In this structure, the distance between the electrodes 3 can be made small over the entire surface, and moreover, the area of the electrodes 3 is large and the region for generating negative glow is wide.
A large output light flux due to the negative glow can be obtained. Other configurations are similar to those of the first embodiment. Here, the valve 1 has a cylindrical shape with a short center line, but may have another shape such as a rectangular tube shape. In short, in the seventh and eighth embodiments, any shape can be used as long as the distance between the electrodes 3 can be set to be substantially uniform.

(Embodiment 9) This embodiment relates to the lighting circuit 6. Now, in the configuration of the first embodiment, the amount of light emission of the negative glow will be considered assuming that no voltage is applied to the electrode 2 and only the electrode 3 is applied by the lighting circuit 6. Assuming that a constant voltage is applied to the electrode 3 at time t ₁ as shown in FIG. 10A, the amount of light emitted by the negative glow sharply increases from the time when the voltage application starts, as shown in FIG. 10B. After that, even if the voltage application to the electrode 3 is continued, the light emission amount decreases, and after the time Δt has elapsed from the start of the voltage application, the light emission amount becomes relatively low and then becomes substantially stable. That is, when the time Δt elapses after the application of the voltage is started, the amount of emission of the negative glow is significantly reduced as compared with the peak value. The time Δt is about twice the time from the start of voltage application to the peak value of the negative glow emission amount.

Therefore, in this embodiment, as shown in FIG. 11A, the lighting circuit 6 is constructed so as to apply an alternating voltage having a period about twice the time Δt to the electrode 3. By applying such an alternating voltage to the electrode 3, it is possible to increase the negative glow emission amount without a period in which the negative glow emission amount decreases. The other configuration is the first embodiment.
Is the same as. Although a rectangular wave having a period of 2Δt is applied to the electrode 3 in the present embodiment, another voltage waveform may be applied as long as the period is 2Δt. For example, a sine wave may be applied to the electrode 3. Good.

(Embodiment 10) In this embodiment, as shown in FIG. 12, the fluorescent layers 4a and 4b in the vicinity of the pair of electrodes 3 are formed of fluorescent substances having different emission colors. Each of the fluorescent layers 4a and 4b is formed over substantially the entire length of the bulb 1 in the longitudinal direction. Now, when a voltage is applied between the electrodes 2 by the lighting circuit 5 to start discharge, a positive column C is formed between the electrodes 2. Here, when a voltage is applied between the electrodes 3 by the lighting circuit 6, the electrodes 3 at each time point are
The positive column C is attracted to the one electrode 3 according to the polarity of. In the vicinity of each electrode 3, fluorescent layers 4a, 4 having different emission colors are provided.
Since b is formed, the ratio of the light emission amount in the fluorescent layers 4a and 4b changes depending on which electrode 3 the positive column C is attracted to. That is, the amount of light emission of each fluorescent layer 4a, 4b can be adjusted by changing the ratio of the application time of each polarity with respect to the alternating voltage applied to the electrode 3, and the adjustment by the color mixture of the emission colors of the fluorescent layers 4a, 4b can be performed. Color is also possible. Moreover, since the emission color from the negative glow is added, it is possible to mix the three colors and the toning range is widened.

If the fluorescent layers 4a and 4b are not made to have different emission colors but have the same emission color and different thicknesses, dimming can be performed by controlling the voltage applied to the electrode 3 as described above. It will be possible. Other configurations are similar to those of the first embodiment. (Embodiment 11) In this embodiment, as shown in FIG. 13, five electrodes 3a are circumferentially separated from each other on the peripheral surface of the straight tubular valve 1.
3 to 3e are arranged. In the configuration of FIG. 13, the electrodes 3a to 3e are arranged only on the substantially half circumference of the peripheral surface of the bulb 1. One electrode 3a is directly connected to one end of the lighting circuit 6, while the other electrodes 3b to 3e are alternatively connected to the lighting circuit 6 via the switching device 8. Therefore, by selecting the electrodes 3b to 3e connected to the lighting circuit 6 by the switching device 8, the pair of electrodes 3a connected to the lighting circuit 6,
The distance between 3b and 3e changes, and the length of the negative glow changes. Since the negative glow becomes stronger as the distance between the electrodes becomes shorter, the emission intensity of the negative glow can be adjusted by selecting the electrodes 3b to 3e. Other configurations are similar to those of the first embodiment. Further, the number of the electrodes 3a to 3e is not limited to five and may be three or more.

(Embodiment 12) In this embodiment, as shown in FIG. 14, a transparent heat conducting film 9 is applied to the outer peripheral surface of the bulb wall of the bulb 1 over substantially the entire length of the bulb 1 in the longitudinal direction. , Heat conductive film 9
A temperature varying device 10 such as a compressor thermally coupled to the heat conducting membrane 9 so that the air can be heated or cooled.
Is provided. Although the electrodes 2 and 3 are omitted in FIG. 14, the other configurations are similar to those of the first embodiment, and by changing the temperature of the tube wall of the bulb 1 and the inside of the tube by the temperature varying device 10, the emission color is changed. It is possible to change. In this way, by adding the means for enabling the color adjustment in addition to the electric signal, the range in which the color adjustment is possible can be expanded.

(Embodiment 13) In this embodiment, as shown in FIG. 15, the discharge lamp A described in Embodiment 1 and the fluorescent lamp 11 having a white emission color are adjacent to each other in the instrument body B. It has been arranged. The fluorescent lamp 11 is turned on by the lighting circuit 12. However, if the light emission amount of the fluorescent lamp 11 is adjusted by the lighting circuit 12 at the same time as the color adjustment by the lighting circuits 5 and 6, it becomes possible to keep the light flux from the main body B of the apparatus as a whole substantially constant, and further, the light emission. It will increase efficiency. That is, while keeping the luminous flux constant,
It can be toned. In addition, if white illumination light is to be obtained, the emission color of the fluorescent lamp 11 is mainly used to correct the illumination color of the illumination light by the emission color of the bulb 1. The color mixing property of is improved, and color unevenness is reduced.

(Embodiment 14) In this embodiment, as shown in FIG. 16, a heating power supply circuit 13 for energizing the electrodes 3 is added to both ends of the electrode 3 in the longitudinal direction. The heating power supply circuit 13 is composed of a series circuit of a power supply E ₁ , a current limiting resistor R ₁ and a switch element SW _1, and is provided for each electrode 3. Switch element SW ₁ of heating power supply circuit 13
Is turned on at the time of starting and heats the valve 1 by passing a current through the electrode 3 to activate the movement of electrons in the tube and facilitate the starting. After the discharge is started, bulb 1
Heating of the switch element SW ₁ is not necessary, so that the switch element SW ₁ is turned off and extra power loss is prevented. In the present embodiment, since the electrode 3 provided for color matching is shared as an auxiliary for starting, it is possible to improve the starting performance with a simple configuration in which the heating power supply circuit 13 is added.

(Embodiment 15) In this embodiment, as shown in FIG. 17, in addition to the structure of Embodiment 1, the valve 1 has a diametrical direction inside the valve 1 at both ends in the longitudinal direction. A pair of third electrodes 14 which are spaced apart from each other is arranged, a high frequency generating circuit 15 is connected to the electrodes 14 via a switch element SW _2, and a high frequency electric field is generated between both electrodes 14.

In the structure of the first embodiment, the electrode 2 forms the discharge path in the longitudinal direction of the bulb 1 and the electrode 3 forms the discharge path in the diameter direction of the bulb 1. However, the electrode 14 is added. As a result, the discharge path between the electrodes 14 intersects both discharge paths between the electrodes 2 and 3, and therefore the switching element SW ₂ is turned on at the time of start-up to generate a high frequency wave between the electrodes 14. If a discharge is generated, it will assist in starting, and after starting, the switch element SW
Turning off ₂ can prevent unnecessary power consumption.

(Embodiment 16) In this embodiment, as shown in FIG. 18, in addition to the structure of Embodiment 1, an induction coil 16 is wound around the outer periphery of the valve 1 around the center line of the valve 1. A high frequency generation circuit 17 is connected to the induction coil 16 via a switch element SW ₃ , and the induction coil 16 causes a high frequency electromagnetic field to act on the internal space of the valve 1.

That is, when the switch element SW ₃ is turned on at the time of starting, a high frequency current is passed through the induction coil 16 and a high frequency electromagnetic field is formed around the induction coil 16. Now, focusing on the high-frequency magnetic field, as shown by the alternate long and short dash line in FIG. 18, since the high-frequency magnetic field along the longitudinal direction of the valve 1 acts on the internal space of the valve 1, the movement of electrons in the tube of the valve 1 It becomes active and the startability is improved.

Therefore, when starting, the switch element SW
₃ may be turned on to improve startability, and after starting, the switch element SW ₃ may be turned off to prevent useless power loss. With such a configuration, the startability can be improved without the need for machining the valve 1. Here, a plurality of induction coils 16 may be provided, and as long as a high frequency electromagnetic field can be applied to the internal space of the valve 1, the induction coil 16 need not be wound around the outer periphery of the valve 1.
For example, not to expose the induction coil 16 to the outside,
The induction coil 16 may be arranged in the valve 1.

(Embodiment 17) In Embodiment 1, two electrodes 3 were provided, but in this embodiment, as shown in FIG.
By sharing one electrode of the negative glow generating electrode 3 with the positive column generating electrode 2, only one electrode 3 is provided on the outer peripheral surface of the bulb wall of the bulb 1, and the electrode 3 is grounded. ing. The electrode 3 is formed over part or the entire circumference of the circumferential surface of the bulb 1.

A voltage is applied to the electrode 2 by the lighting circuit 5 as in the first embodiment. On the other hand, each electrode 2 and electrode 3
Lighting circuits 6e and 6f are connected between and. That is, the negative glow is formed between each electrode 2 and the electrode 3. Here, since the electrode 3 is grounded, even if a person touches the electrode 3, there is no electric shock and the safety is high. Other configurations are similar to those of the first embodiment.

(Embodiment 18) This embodiment is different from Embodiment 1 in that the electrode 3 is provided on the inner peripheral surface of the bulb 1 as shown in FIG. With such a configuration, even if a person touches the bulb 1, the electrode 3 does not cause an electric shock and safety is improved. Other configurations are similar to those of the first embodiment.

(Embodiment 19) In this embodiment, as shown in FIG. 21, in the structure of Embodiment 1, a coating layer 18 covering the outer peripheral surface of the bulb 1 including the outer peripheral surface of the electrode 3 over the entire circumference. Is formed. That is, the electrode 3 is sandwiched between the outer peripheral surface of the bulb wall of the bulb 1 and the coating layer 18. The cover layer 18 is formed of a transparent insulating material such as glass. Here, there may be a gap between the outer peripheral surface of the valve 1 and the inner peripheral surface of the coating layer 18. By adopting the above configuration, in this embodiment, even if a person touches the bulb 1 while a high voltage is applied to the electrode 3, no electric shock will occur. Other configurations are similar to those of the first embodiment.

(Embodiment 20) In this embodiment, as shown in FIG. 22, an inner pipe 1c and an outer pipe 1d having different diameters are coaxially arranged and the valve 1 is a double pipe. Thus, the electrode 2 is arranged in the inner tube 1c, and the fluorescent layer 4 is formed on the inner peripheral surface of the inner tube 1c. Further, electrodes 3 are provided on the outer peripheral surface of the inner tube 1c and the inner peripheral surface of the outer tube 1d, respectively. Therefore, in the inner tube 1c, a positive column is formed between the electrodes 2 and the fluorescent layer 4 emits light, and the negative glow is generated in the inner tube 1c.
And the outer tube 1d. As the light emitting gas, a mixed gas of mercury vapor and a rare gas may be enclosed both inside the inner tube 1c and between the inner tube 1c and the outer tube 1d, but mainly inside the inner tube 1c. Mercury vapor may be enclosed and a rare gas may be enclosed mainly between the inner tube 1c and the outer tube 1d. Thus, the luminous efficiency can be optimized by adjusting the component ratio of the light emitting gas. Moreover, by separating the space forming the positive column that causes the fluorescent layer 4 to emit light and the space in which negative glow occurs, by separating the spaces in which light emission occurs in different mechanisms, the light emission in each mechanism The control becomes easier and the light emission can be optimized. Moreover, since the electrode 3 is provided over substantially the entire circumference of the inner tube 1c and the outer tube 1d, color mixing with the light flux from the fluorescent layer 4 is performed uniformly. Other configurations are similar to those of the first embodiment.

(Embodiment 21) In this embodiment, as shown in FIG. 23, a second outer pipe 1e is coaxially arranged further outside of the outer pipe 1d in the embodiment 20, and the valve 1 is a triple pipe. It is what Electrodes 3 are formed on the outer peripheral surface of the outer tube 1d and the outer peripheral surface of the second outer tube 1e, respectively. Furthermore, the rare gas sealed between the outer tube 1d and the second outer tube 1e is selected to have a different emission color from the rare gas sealed between the inner tube 1c and the outer tube 1d. ing. Also,
An electrode 3 formed on the facing surface of the inner tube 1c and the outer tube 1d,
A voltage is applied to the electrodes 3 formed on the facing surfaces of the outer tube 1d and the second outer tube 1e by separate lighting circuits 6h and 6g.

In the above structure, the fluorescent layer 4 is provided in the inner tube 1c.
, And the negative glow emits light in the space between the inner tube 1c and the outer tube 1d and in the space between the outer tube 1d and the second outer tube 1e, respectively. If the emission colors are obtained, the toning range is expanded by mixing the three colors. The other configuration is the second embodiment.
The same as 0.

In the present embodiment, the bulb 1 is a triple tube, but the bulb 1 may be a multi-tube having a quadruple or more, and the fluorescent layer 4 is not limited to the inner tube 1c but other tubes. The electrodes 2 may be arranged in a space so that a positive column is generated in the space. (Embodiment 22) In this embodiment, as shown in FIG. 24, by forming a partition wall 19 parallel to the longitudinal direction of the valve 1 inside the valve 1 having a rectangular cross section, two internal spaces of the valve 1 are formed. It is divided into However, as shown in FIG. 24 (b), the internal space of the valve 1 is not completely independent, and the two chambers partially communicate with each other. The partition wall 19 is a transparent plate such as glass. The electrode 2 is provided in one of the two chambers to form the fluorescent layer 4 on the inner peripheral surface of the bulb 1, and the tube wall of the bulb 1 and the partition wall 19 are provided in the other. An electrode 3 is provided on each of and. In addition, a mixed gas of mercury vapor and a rare gas is enclosed as a light emitting gas in the internal space of the bulb 1. By applying a voltage to each of the electrodes 2 and 3, the fluorescent layer 4 emits light and a negative glow is generated. It is designed to emit light.

According to the above construction, when viewed from the direction intersecting the partition wall 19, the emission color of the fluorescent layer 4 and the emission color of the negative glow are mixed, and the emission amounts of both are adjusted. It can be toned. In this embodiment, the interior of the valve 1 is divided into two chambers by the partition wall 19, but a transparent partition wall 19 may be further added to separate the chamber into three or more chambers. In this case, if the fluorescent layers 4 of different emission colors are formed on the inner peripheral surface of each chamber and the electrode 2 is provided for each chamber,
By adjusting the amount of light emission in the fluorescent layer 4 for each emission color,
The range of toning can be expanded. Further, the sectional shape of the valve 1 is not limited to the rectangular shape.

In each of the above embodiments, the first electrode 2 is
The hot cathode may be either a hot cathode or a cold cathode, and the hot cathode may be either a direct heating type or an indirectly heating type. Further, although mercury vapor and a rare gas are used as the light emitting gas in the embodiment, the light emitting gas that generates light converted into visible light in the fluorescent layer 4 by discharge and the emission color in the fluorescent layer 4 are used. The type of the light emitting gas is not particularly limited as long as the light emitting gas that emits light of different emission colors by the negative glow is used.

[0065]

According to the first aspect of the present invention, two kinds of light emitting gas are provided in the bulb so that the light emitting color of the fluorescent substance due to luminescence and the light emitting color of the light emitting gas in the negative glow are made different from each other. Since it is sealed in, it is possible to obtain two emission colors, one of which is the emission color of the fluorescent material and the other of which is the glow of the negative glow, and the bulb is more than the length of the negative glow. Since there is provided a first electrode pair spaced apart to the extent that a long positive column is generated and a second electrode pair spaced apart by not more than twice the length of the negative glow, It is possible to obtain a large amount of negative glow while forming a sufficient positive column to make the fluorescent substance emit light.
By adjusting the applied voltages to the first electrode pair and the second electrode pair, respectively, it is possible to adjust the light quantity ratio between the emission color of the fluorescent substance due to luminescence and the emission color of the negative glow. The effect is that color matching is possible.

According to the second aspect of the present invention, since the conductor is attached to the outer peripheral surface of the tube wall of the valve to form the second electrode pair, the second electrode pair is formed.
There is an effect that the electrode pair can be easily provided. According to the invention of claim 3, the slit formed between the second electrode pair extends in a direction inclined with respect to the center line direction of the bulb, and the length of the slit in the extension direction is the center of the bulb. Since it is set longer than the length in the line direction,
There is an advantage that the region where the negative glow is generated can be widened in the internal space of the bulb, and the light flux from the negative glow that generally emits less light can be relatively large.

According to the invention of claim 4, the second electrode pair includes a plurality of pairs of electrodes, and since negative glow is generated between each pair of electrodes, the second electrode pair covers a relatively wide area of the internal space of the valve. As a result, negative glow can be formed, and as a result, the amount of light emitted by the negative glow can be made relatively large. According to the fifth aspect of the invention, the surfaces of the bulb on which the second electrode pairs are provided are substantially parallel to each other, so that negative glow can be generated over substantially the entire surface between the second electrode pairs. Thus, there is an advantage that the light emission amount of the negative glow can be made relatively large.

According to the sixth aspect of the invention, the power is periodically supplied to the second electrode pair, and about half the time from the start of each power supply until the output light flux from the negative glow reaches the peak value is half. Since the period is set, only the period in which the amount of emission of the negative glow is large is used, and the amount of emission of the negative glow can be increased. According to a seventh aspect of the invention, the fluorescent substance is deposited on the inner peripheral surface of the bulb, and at least one of the emission color and the thickness is made different depending on the location of the bulb. 2nd pillar of sunlight
Since the fluorescent substance moves in the bulb according to the polarity of the voltage applied to the electrode pair, if the emission color of the fluorescent substance is different, the emission color of the fluorescent substance is adjusted by adjusting the polarity applied to the second electrode pair. It becomes possible to adjust the light color obtained by mixing the two colors, and since a mixed color of three or more emission colors can be obtained together with the emission color of negative glow, there is an advantage that the range of toning can be widened. Further, when the thickness of the fluorescent substance is different, it becomes possible to adjust the light emission by adjusting the light emission amount for each place.

According to the invention of claim 8, when the second electrode pair is provided with a plurality of electrodes, power is supplied between the desired electrodes by the power supply device, so that the amount of emission of the negative glow is changed according to the distance between the electrodes. It is possible to adjust, and as a result, the range of adjusting the amount of emission of the negative glow is widened, which has the effect of widening the range of toning. According to the invention of claim 9, since the temperature varying means for adjusting the temperature inside the bulb is provided, there is an effect that the emission color can be adjusted by adjusting the temperature. That is, since the color adjustment means by adjusting the temperature is added, there is an advantage that the range of color adjustment can be expanded.

According to the tenth aspect of the present invention, the fluorescent lamp whose emission color is white is provided in one instrument main body together with the bulb. Therefore, when white mixed light is obtained, the main light flux is emitted by the fluorescent lamp. Since it is necessary to secure the light emission and to correct the light color by mixing the emission colors of the bulb, the color mixture is improved and the color unevenness is reduced as compared with the case where white light is mixed with the bulb alone. It has an advantage that the luminous efficiency can be increased.

According to the eleventh aspect of the present invention, each electrode of the second electrode pair is heated by energizing it. Therefore, if the second electrode pair is heated at the time of starting, the electron motion inside the valve is activated to improve the startability. There is an effect that it can be improved. Claim 12
In the invention, since a high frequency voltage is applied to the third electrode pair attached to the valve to cause a high frequency electric field to act in the valve,
When a high frequency electric field is applied at the time of starting, there is an advantage that the electron motion inside the valve can be activated and the starting performance can be improved.

According to the thirteenth aspect of the present invention, the induction coil is arranged close to the valve, and the induction coil is energized with a high frequency current so that the high frequency electromagnetic field acts on the internal space of the valve. If it is generated, there is an advantage that the electron motion inside the valve can be activated and the startability can be improved. In the fourteenth aspect of the present invention, one electrode of the second electrode pair is shared with the first electrode pair, and the other electrode of the second electrode pair is grounded. Therefore, the electrode on the outer peripheral surface of the valve is connected to the ground side. The use of electrodes has the advantage that there is no electric shock even if the valve is touched, and safety is enhanced.

The fifteenth aspect of the invention has the advantage that the second electrode pair is disposed inside the valve, and therefore there is no electric shock even if the valve is touched, and the safety is improved.
According to the sixteenth aspect of the present invention, the second electrode pair is sandwiched between the coating layer made of an insulating material and the outer peripheral surface of the tube wall of the valve. Therefore, the presence of the coating layer directly contacts the second electrode pair. This has the advantage of preventing electric shock and consequently increasing the safety.

According to a seventeenth aspect of the present invention, the first electrode pair is provided in the tubular body having the smallest diameter by using a valve formed of a multi-tubular tube having a plurality of tubular bodies having different diameters with a common center. Since the second electrode pair is provided over substantially the entire opposing surface between them, the positive column and the negative glow are generated in the spaces separated from each other, and the positive column and the negative glow are generated. The effect of facilitating the control of the dimming becomes easier, and as a result, the dimming control becomes easier. Moreover, since the second electrode pair is provided over substantially the entire opposing surface of the tubular body, negative glow can be generated over substantially the entire circumference in the circumferential direction of the valve,
There is an advantage that the color mixing property is improved.

According to the eighteenth aspect of the present invention, a transparent partition wall for partitioning the internal space of the bulb into a plurality of spaces is provided, and the light emission space by the discharge of the first electrode pair and the light emission by the discharge of the second electrode pair. Since the space is a separate space separated by a partition wall, when viewed from the direction crossing the partition wall, negative glow will occur over the entire surface, and high color mixing in a specific direction can be obtained. In addition, since the positive column and the negative glow are generated in different spaces, there is an advantage that the color matching control becomes easy.

In the nineteenth aspect of the present invention, the second light emitting gas is a mixed gas of a plurality of kinds of gases having different emission colors, so that the emission color of the negative glow can be used as the mixed color light to widen the toning range. The effect is that you can do it.

[Brief description of drawings]

FIG. 1 shows Example 1, (a) is a schematic configuration diagram, and (b).
FIG. 4B is a sectional view taken along line XX of FIG.

FIG. 2 is an operation explanatory diagram illustrating a negative glow generation state according to the first embodiment.

3A and 3B show a second embodiment, in which (a) is a schematic configuration diagram and (b).
FIG. 4B is a sectional view taken along line XX of FIG.

FIG. 4 is a schematic configuration diagram showing a third embodiment.

FIG. 5 is a schematic configuration diagram showing a fourth embodiment.

FIG. 6 shows Example 5, (a) is a schematic configuration diagram, (b).
FIG. 3 is a schematic configuration diagram corresponding to a cross section taken along line XX of FIG.

7A and 7B show a sixth embodiment, in which (a) is a schematic configuration diagram and (b).
FIG. 3 is a schematic configuration diagram corresponding to a cross section taken along line XX of FIG.

FIG. 8 is a schematic configuration diagram showing a seventh embodiment.

FIG. 9 is a schematic configuration diagram showing an eighth embodiment.

FIG. 10 is an explanatory diagram showing an operation of a comparative example with respect to the ninth embodiment.

FIG. 11 is an operation explanatory view of the ninth embodiment.

FIG. 12 is a schematic configuration diagram showing a tenth embodiment.

FIG. 13 shows Example 11, (a) is a schematic configuration diagram,
(B) is a partially broken sectional view.

FIG. 14 is a schematic configuration diagram showing an twelfth embodiment.

FIG. 15 is a schematic configuration diagram showing a thirteenth embodiment.

FIG. 16 is a schematic configuration diagram showing a fourteenth embodiment.

FIG. 17 is a schematic configuration diagram showing an example 15.

FIG. 18 is a schematic configuration diagram showing Example 16;

FIG. 19 is a schematic configuration diagram showing Example 17;

20 shows a valve used in Example 18, (a) is a side view, (b) is a sectional view taken along line XX of (a). FIG.

21A and 21B show a valve used in Example 19, in which FIG. 21A is a sectional view and FIG. 21B is a sectional view taken along line XX of FIG. 21A.

FIG. 22 shows Example 20, (a) is a schematic configuration diagram,
(B) is a cross-sectional view corresponding to the cross section along line XX of (a).

FIG. 23 shows Example 21, (a) is a schematic configuration diagram,
(B) is a cross-sectional view corresponding to the cross section along line XX of (a).

FIG. 24 shows Example 22 in which (a) is a schematic configuration diagram,
(B) is a cross-sectional view corresponding to the cross section along line XX of (a).

FIG. 25 is a schematic configuration diagram showing a conventional example.

FIG. 26 is a schematic configuration diagram showing another conventional example.

FIG. 27 shows still another conventional example, (a) is a sectional view,
(B) is a sectional view taken along line XX of (a).

[Explanation of symbols]

 1 bulb 1a inner tube 1b outer tube 1c inner tube 1d outer tube 1e second outer tube 2 first electrode 3 second electrode 4 fluorescent layer 4a fluorescent tank 4b fluorescent tank 5 lighting circuit 6 lighting circuit 6a lighting circuit 6b lighting Circuit 6c Lighting circuit 6d Lighting circuit 6e Lighting circuit 6f Lighting circuit 6g Lighting circuit 6h Lighting circuit 7 Slit 8 Switching device 9 Thermal conductive film 10 Temperature varying device 11 Fluorescent lamp 12 Lighting circuit 13 Heating power circuit 14 Electrode 15 High frequency generating circuit 16 Induction Coil 17 High frequency generating circuit 18 Covering layer 19 Partition wall

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H01J 61/94 7135-5E H05B 37/02 L 8715-3K

Claims (19)

[Claims] 1. A first electrode pair and a first electrode pair, which are spaced apart from each other so as to generate a positive column sufficiently longer than the length of the negative glow, and spaced apart from each other by not more than twice the length of the negative glow. And a discharge lamp in which the second electrode pair is provided in the bulb and the fluorescent substance is built in the bulb. Inside the bulb, the fluorescent substance is ionized and excited in the positive column generated between the first electrode pair. The first light-emitting gas that emits light converted into light and the negative glow generated between the second electrode pair are ionized and excited to emit visible light having a wavelength different from that of visible light from the fluorescent substance. A second power supply device is provided which encloses a second light emitting gas to be radiated and supplies power to each of the first electrode pair and the second electrode pair so that discharge is generated, and the first electrode pair and the second electrode pair are provided. A color-adjusting device for adjusting power supplied to at least one of Discoloring discharge lamp device. 2. The variable color discharge lamp device according to claim 1, wherein the second electrode pair is formed by attaching a conductor to the outer peripheral surface of the bulb wall of the bulb. 3. The second electrode pair is composed of a plurality of electrodes having substantially the same area and spaced apart from each other through a slit, the valve is tubular, and the slit is inclined with respect to the center line direction of the valve. 2. The variable color discharge lamp device according to claim 1, wherein the length of the slit in the extension direction is set to be longer than the length of the bulb in the direction of the center line of the bulb. 4. The variable color discharge lamp device according to claim 1, wherein a plurality of second electrode pairs are provided. 5. The variable color discharge lamp device according to claim 1, wherein the surfaces of the bulb on which the second electrode pairs are provided are substantially parallel to each other. 6. The power supply device periodically supplies power to the second electrode pair, and a half cycle is about twice the time from the start of each power supply until the output luminous flux from the negative glow reaches a peak value. The variable color discharge lamp device according to claim 1, wherein the variable color discharge lamp device is formed. 7. A fluorescent material is deposited on the inner surface of the bulb,
2. The variable color discharge lamp device according to claim 1, wherein at least one of the emission color and the thickness differs depending on the location of the bulb. 8. The second electrode pair comprises a plurality of electrodes,
2. The variable color discharge lamp device according to claim 1, wherein the power supply device includes a switching unit that supplies power between desired electrodes among the electrodes forming the second electrode pair. 9. The variable color discharge lamp device according to claim 1, further comprising temperature varying means for adjusting the temperature inside the bulb. 10. The variable color discharge lamp device according to claim 1, wherein a fluorescent lamp whose emission color is white and the discharge lamp are provided in one fixture body. 11. The variable color discharge lamp device according to claim 1, further comprising a heating power supply circuit for heating by energizing each electrode of the second electrode pair. 12. A third electrode pair attached to the valve,
2. The variable color discharge lamp device according to claim 1, further comprising a high-frequency generation circuit that applies a high-frequency voltage to the third electrode pair to cause a high-frequency electric field to act in the bulb. 13. An induction coil arranged in the vicinity of the valve, and a high-frequency generation circuit for supplying a high-frequency current to the induction coil to cause a high-frequency electromagnetic field to act in the valve. The variable color discharge lamp device according to claim 1. 14. The variable color according to claim 1, wherein one pole of the second electrode pair is shared with the electrode of the first electrode pair, and the other pole of the second electrode pair is grounded. Discharge lamp device. 15. The variable color discharge lamp device according to claim 1, wherein the second electrode pair is arranged inside the bulb. 16. The variable color discharge lamp device according to claim 1, wherein the second electrode pair is sandwiched between a coating layer formed of an insulating material and an outer peripheral surface of the bulb wall of the bulb. . 17. The valve is a multi-tube composed of a plurality of tubes having a common center and different diameters, wherein a first electrode pair is provided in the tube having the smallest diameter, and the opposing surfaces between the tubes are substantially the same. 2. The variable color discharge lamp device according to claim 1, wherein a second electrode pair is provided over the entire surface. 18. A partition body is provided to partition the internal space of the bulb into a plurality of independent spaces, and the space between the light emission space by the discharge at the first electrode pair and the light emission space by the discharge at the second electrode pair is a partition body. 2. The variable color discharge lamp device according to claim 1, wherein the variable color discharge lamp device is formed by separate spaces. 19. The variable color discharge lamp device according to claim 1, wherein the second light emitting gas is a mixed gas of a plurality of kinds of gases having different emission colors.