WO2002073655A1

WO2002073655A1 - Discharge lamp, discharge lamp apparatus, and discharge lamp system

Info

Publication number: WO2002073655A1
Application number: PCT/JP2002/002062
Authority: WO
Inventors: Yosuke Hirao; Koji Nakano
Original assignee: Photoscience Japan Corporation
Priority date: 2001-03-08
Filing date: 2002-03-06
Publication date: 2002-09-19
Also published as: JP2002334795A

Abstract

A discharge lamp (12) including a pair of discharge filaments (F1, F2) comprises source supply terminals (T1, T2) for filaments each connected to one end of each filament, and a capacitor (13) connected between the other ends of the filaments. Upon lighting start, preheat current flows through the filaments (F1, F2) via the capacitor (13). They are connected to the source supply circuit (20) via the source supply terminals (T1, T2) with two wirings. AC bypass capacitors (C1, C2) for the respective filaments may be provided which bypass one end and the other end of each of the filaments (F1, F2). The capacitor is stored in the base (12a) of the discharge lamp (12), or in an adaptor, or in a socket.

Description

Description Discharge lamp, discharge lamp device and discharge lamp system

The present invention relates to an ultraviolet discharge lamp, a fluorescent lamp and other discharge lamps used in an ultraviolet disinfection device or a sterilization device, and more particularly to a discharge lamp device including the discharge lamp. The present invention relates to a discharge lamp system including a discharge lamp device. Background technology

Conventionally, there are two terminal types and four terminal types of ultraviolet discharge lamps. Fig. 19 shows an example of a two-terminal type discharge lamp 10 and its associated power supply circuit 20. In the two-terminal type, a pair of discharge filaments F1, F2 in the discharge lamp 10 is used. A power supply terminal T 1, T 2 is provided at each end of the power supply circuit, and is attached to and detached from the power supply circuit 20 via the power supply terminals T 1, T 2. The power supply circuit 20 includes, for example, a DC converter 22 that converts a power supply from a commercial AC power supply 21 into a DC voltage, an inverter circuit 23 that converts the DC voltage into a predetermined high-frequency voltage, and a chiyo. And a series resonance circuit including a coil 24 and a capacitor 25. Generally, in an ultraviolet disinfection device or a sterilization device, the power supply circuit 20 is disposed on the side of the control panel that is separated from the ultraviolet discharge lamp 10, so that the wiring portion 30 between them is relatively small. become longer. In the two-terminal type, the number of wirings in the wiring part 30 is only two, so that the configuration is simple and the cost is small. In addition, the base structure of the discharge lamp 10 is simplified because it requires only two terminals, and the cost of the discharge lamp 10 itself is also reduced to the cost. Despite these advantages, high-frequency signals are applied directly at the start of lighting without preheating the filaments Fl and F2, causing spattering and shortening the lamp life. Similar problems can occur not only with ultraviolet discharge lamps but also with other discharge lamps.

On the other hand, in the four-terminal discharge lamp 11, as shown in FIG. Not only are the power supply terminals T 1 and T 2 provided at one end of the pair of discharge filaments F 1 and F 2, respectively, but also the pre-heating terminals T 3 and T 4 are provided. The preheating terminals T 3 and T 4 are connected to the secondary side of the preheating transformer 26 on the power supply circuit 20 side via the wiring section 30. In such a four-terminal type, the filaments F1 and F2 are preheated at the time of starting lighting, so that sputtering can be prevented and the lamp life can be extended. On the other hand, since the number of wirings in the wiring section 30 is four, the configuration is complicated and the cost is high. Further, the base structure of the discharge lamp 11 has four terminals, which is complicated, and the cost of the discharge lamp 11 itself increases. Furthermore, a transformer 26 for preheating must be provided on the side of the power supply circuit 20, which is disadvantageous also in this respect. Similar problems can occur not only with ultraviolet discharge lamps but also with other discharge lamps.

The ballast is composed of a series resonance circuit including a choke coil 24 and a capacitor 25. The discharge current applied to the discharge lamp is determined by the capacitor 25 forming a series resonance circuit together with the choke coil 24. Ballasts are usually designed for the rating of the lamp used and the current rating of the lamp controlled by the ballast is adapted. If a discharge current exceeding the rated current flows through the discharge lamp using a ballast that does not meet the rating of the discharge lamp, the filament of the discharge lamp will be easily consumed and the filament life will be shortened. Previously, it was virtually impossible to use a ballast that did not meet the rating of the discharge lamp. Therefore, the ballast had to be designed and manufactured individually for each rating of each discharge lamp, which was costly. Similar problems can occur with other discharge lamps, not only with UV lamps. Disclosure of the invention

The present invention has been made in view of the above points, and it is possible to minimize the number of wirings to the power supply circuit side and to suppress sputtering at the time of starting lighting by filament preheating to extend lamp life. An object of the present invention is to provide a discharge lamp, a discharge lamp device, and a discharge lamp system, which have a compact structure as a whole, and have a small handling. Another object of the present invention is to provide a discharge lamp, a discharge lamp device, and a discharge lamp system in which a common ballast can be used in discharge lamps having different ratings without shortening the filament life.

A discharge lamp according to a first aspect of the present invention includes a discharge lamp body including a pair of discharge filaments, and a base provided on the discharge lamp body, wherein each of the filaments connected to one end of the filament is provided. And a capacitor housed inside the base and connected between the other ends of the filaments.

A discharge lamp according to a second aspect of the present invention is a discharge lamp main body including a pair of discharge filaments, and an adapter attached to the discharge lamp main body, wherein each of the filaments connected to one end of each of the filaments is provided. And a capacitor housed inside the adapter and connected between the other ends of the filaments.

A discharge lamp device according to a third aspect of the present invention is a discharge lamp including a pair of discharge filaments, wherein a terminal connected to each end of each filament is exposed, and the discharge lamp is detachable. A socket connected to a power supply line as one power supply terminal for each filament connected to one end of each filament of the discharge lamp; and And a capacitor connected between terminals connected to the other end of each filament of the discharge lamp.

According to a fourth aspect of the present invention, in the discharge lamp or the discharge lamp device, further comprising: an AC current bypass capacitor for each filament, which bypasses one end and the other end of the filament for each filament. Have.

A discharge lamp system according to a fifth aspect of the present invention includes: the discharge lamp or the discharge lamp device; a power supply line connected to one power supply terminal for each filament; and the power supply line. And a power supply circuit for supplying power to the discharge lamp through the power supply circuit.

According to the discharge lamp or the apparatus according to any of the first to fifth aspects, the power supply The number of wires to the supply circuit side can be minimized, and the preheating of the filament can suppress sputtering at the start of lighting to prolong the lamp life. Become.

According to still another aspect, a discharge lamp according to the present invention includes: a discharge lamp body including a pair of discharge filaments; and a filament for each filament, wherein the filament passes between one end and the other end of the filament. An AC current bypass capacitor. According to this, even if a discharge current exceeding the rating of the discharge lamp is supplied from the ballast, the flow of current to the filament is bypassed by the bypass capacitor, so that the consumption of the filament can be prevented. However, the filament life can be appropriately maintained. Therefore, a common ballast can be shared by discharge lamps having different ratings, so that it is possible to reduce the cost of designing and manufacturing the ballast and to reduce the cost. At least one of the AC current bypass capacitors described above is connected to the inside of a base provided in the discharge lamp body, the inside of an adapter attached to the discharge lamp body, or a socket to which the discharge lamp is detachably attached. May be provided inside. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic cross-sectional view showing one embodiment of a discharge lamp according to the present invention,

FIG. 2 is a schematic circuit diagram showing one embodiment of a discharge lamp system in which the discharge lamp according to the embodiment is connected to a power supply circuit,

FIG. 3 is a diagram exemplifying a voltage characteristic between filaments at the time of starting lighting in the embodiment.

FIG. 4 is a schematic sectional view showing another embodiment of the discharge lamp according to the present invention,

FIG. 5 is a schematic sectional view showing one embodiment of the discharge lamp device according to the present invention,

FIG. 6 is a schematic sectional view showing another embodiment of the discharge lamp device according to the present invention,

FIG. 7 is a schematic circuit diagram showing another embodiment of the discharge lamp system according to the present invention, and FIG. 8 is a schematic sectional view showing one embodiment of the discharge lamp according to the present invention to which the circuit configuration of FIG. 7 is applied. ,

FIG. 9 shows an embodiment of the discharge lamp device according to the present invention to which the circuit configuration of FIG. 7 is applied. Cross section schematic diagram,

FIG. 10 is a schematic sectional view showing another embodiment of the discharge lamp according to the present invention,

FIG. 11 is a schematic circuit diagram showing one embodiment of a discharge lamp system in which the discharge lamp according to the embodiment of FIG. 10 is connected to a power supply circuit,

FIG. 12 is a schematic sectional view showing a modification of the discharge lamp according to FIG.

FIG. 13 is a schematic cross-sectional view showing still another embodiment of the discharge lamp according to the present invention,

FIG. 14 is a schematic sectional view showing a modification of the discharge lamp according to FIG.

FIG. 15 is a schematic cross-sectional view showing another embodiment of the discharge lamp device according to the present invention,

FIG. 16 is a schematic cross-sectional view showing still another embodiment of the discharge lamp device according to the present invention, FIG. 17 is a schematic circuit diagram showing another embodiment of the discharge lamp system according to the present invention, and FIG. A schematic circuit diagram showing still another embodiment of the discharge lamp system according to the present invention, FIG. 19 is a schematic circuit diagram showing an example of a conventional discharge lamp system,

FIG. 20 is a schematic circuit diagram showing another example of the conventional discharge lamp system. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIGS. 1 to 9, the number of wires to the power supply circuit side can be minimized, and the preheating of the filament suppresses the sputtering at the time of starting the lighting and extends the lamp life. Several embodiments of the intended discharge lamp and device according to the invention are shown.

FIG. 1 shows an embodiment of a discharge lamp 12 according to the present invention, in which a main body of the discharge lamp 12 includes a glass tube 12 c, and bases 12 a and 12 b provided at both ends thereof. , And a pair of discharge filaments F 1 and F 2 provided therein. In one of the bases 12a, one power supply terminal T1, T2 for each filament connected to one end of each of the filaments F1, F2 is provided so as to be exposed in a plug-in type. That is, a connection in which one end of one filament F1 is connected to the terminal T1 via a connection inside the base 12a, and one end of the other filament F2 is extended along the outside of the glass tube 12c. To terminal T 2 provided on the side of base 12 a via line 12 d Connect. A capacitor 13 is inserted and connected between the other ends of the filaments Fl and F2, and the capacitor 13 is housed inside one of the bases 12a. That is, the other end of one filament F1 is connected to one end of the capacitor 13 via a connection inside the base 12a, and the other end of the other filament F2 is outside the glass tube 12c. It is connected to the other end of the capacitor 13 inside the base 12 a via a connection line 12 e extending along. Although the capacitor 13 is illustrated as being housed inside the base 12a in the figure, it may be housed inside the other base 12b.

In the case of FIG. 1, a socket (not shown) to which the discharge lamp 12 is detachably mounted is provided corresponding to one of the bases 12a. The number of wires in the wiring section 30 extending from this socket (not shown) to the power supply circuit 20 is only two, corresponding to the two terminals T 1 and T 2. It has a simple configuration. In the configuration of Fig. 1, the condenser 13 is housed inside the base 12a or 12b of the discharge lamp 12, so that the appearance of the discharge lamp 12 can be made compact and easy to handle. It becomes. It is to be noted that the two plug-type terminals T 1 and T 2 are not limited to the case where both are provided on one base 12 a, and the other plug-type terminal T 2 is provided on the other base 12 b. You may do it. In that case, a socket (not shown) to which the discharge lamp 12 is detachably mounted is provided corresponding to both the bases 12a and 12b.

FIG. 2 shows an example of an electric circuit of a discharge lamp system in which the discharge lamp 12 is connected to a power supply circuit 20. The power supply circuit 20 includes a DC converter 22 for converting the power from the commercial AC power supply 21 to a DC voltage, and an inverter for converting the DC voltage to a predetermined high-frequency voltage, as in the prior art. And a choke coil 24. The capacitor forming a series resonance circuit together with the choke coil 24 is carried by the capacitor 13 on the side of the discharge lamp 12, and therefore need not be provided on the side of the power supply circuit 20. That is, the capacitor 13 has both a resonance action and a filament preheating action. Here, since the capacitor 13 is connected between the other ends of the filaments F 1 and F 2, the capacitor 13 is provided not on the power supply circuit 20 but on the discharge lamp 12 side. Therefore, as described above, the number of wires in the wiring section 30 that connects the power supply circuit 20 and the discharge lamp 12 is two. Only two leads connected to the power supply terminals T 1 and Τ 2 are required, and wiring can be simplified.

With this configuration, at the time of lighting start-up in which a power switch (not shown) provided on the side of the power supply circuit 20 is turned on to start power supply to the discharge lamp 12, one power supply terminal Tl and one filament F 1 and the other end of the one filament F1 to the other end of the other filament F2, the other end of the other filament F2, and the other power supply terminal Τ2 through the capacitor 13. Preheating current flows through the route. Fig. 3 illustrates the voltage characteristics between filaments Fl and F2, that is, the capacitor 13 at the start of lighting. "〇N" indicates the time when the power switch is turned on, and "Start" indicates the discharge start time. Is shown. The period from “ON” to “start” corresponds to the preheating period, during which the voltage gradually increases, and when the discharge starting voltage is reached, the discharge between the filaments F 1 and F 2 starts. As a result, it is possible to suppress spattering at the filament at the time of lighting activation due to the filament preheating effect, and to prolong the lamp life.

In the example of FIG. 1, the capacitor 13 is housed in the base 12 a (or 12 b) at the stage of manufacturing the discharge lamp 12. On the other hand, a discharge lamp 12 according to another embodiment of the present invention shown in FIG. 4 has a condenser 14a in an adapter 14a attached to one base 11a of the discharge lamp main body 11. An example of arranging 13 is shown. In this case, the discharge lamp body 11 itself may be manufactured at the manufacturing stage as a total of four-terminal discharge lamps having two terminals in each of the bases 11a and 11b. Then, an adapter 14a is attached to such a four-terminal type discharge lamp main body 11, and a capacitor 13 is disposed inside the adapter 14a. In the adapter 14a, one power supply terminal T1, T2 for each filament connected to one end of each filament F1, F2 is inserted and exposed in a plug-type manner.

For example, in an adapter 14 a attached to one base 11 a of the discharge lamp body 11, one end of one filament F 1 is connected to one plug type terminal T 1 via a terminal of base 11 a, The other end of the filament F1 is connected to one end of the capacitor 13 via the terminal of the base 11a. And the other base 1 1 of the discharge lamp body 1 1 In the adapter 14 b attached to b, the plug type terminal is not provided, and one end of the other filament F 2 extends along the outside of the discharge lamp body 11 through the terminal of the base 11 b. It is connected to the connection line 11d, and further connected via this connection line 11d to the plug-type terminal T2 provided on the other adapter 14a side. Also, the other end of the other filament F2 is connected to the capacitor 13 inside the adapter 14a via a connection line 11e extending along the outside of the discharge lamp body 11 via the adapter 14b. Connect to the other end. Although the capacitor 13 is illustrated as being housed inside the adapter 14a in the figure, it may be housed inside the other adapter 14b. Also in the case of FIG. 4, a socket (not shown) to which the discharge lamp 12 provided with the adapter 14a is detachably mounted is provided corresponding to one of the adapters 14a. The wiring section 30 extending from this socket (not shown) to the power supply circuit 20 has only two wires corresponding to the two terminals Tl and T2. The circuit configuration of the discharge lamp system including the same is the same as in FIG. Therefore, it has a simple configuration with a minimum number of wires. Also in the configuration of FIG. 4, since the capacitor 13 is housed inside the adapter 14a on the side of the discharge lamp 12, the appearance of the discharge lamp 12 can be made compact and easy to handle. . In the example of Fig. 4, no extra processing is required at the stage of manufacturing the discharge lamp body 11, and the capacitor 13 can be stored when the adapter 14a is attached to the completed discharge lamp body 11. Therefore, there is an advantage that the production is simple. It should be noted that the two plug-type terminals Tl and T2 are not limited to being provided on one adapter 14a side, and the other plug-type terminal T2 may be provided on the other adapter 14b side. It may be. In that case, sockets (not shown) to which the discharge lamps 12 are detachably mounted are provided corresponding to both adapters 14a and 14b.

In the discharge lamp device according to one embodiment of the present invention shown in FIG. 5, a capacitor 13 is not provided in the discharge lamp 12 itself, and a capacitor 15 is provided on the side of the socket 15 to which the discharge lamp 12 is detachably mounted. 13 is provided. In this case, at both ends of the discharge lamp body 11 of the discharge lamp 12, adapters 14 b and 14 c are provided as in FIG. 4, but an adapter 14 instead of the adapter 14 a in FIG. Place capacitors 13 in c. Instead, the adapter 14 c is configured as a four-terminal plug so that it can be inserted into and removed from the socket 15. A capacitor 13 is provided inside the socket 15, and when the four-terminal plug-type adapter 14c attached to the discharge lamp body 11 is inserted into the socket 15, the filaments F1, F2 of the discharge lamp body 11 are connected. One power supply terminal Tl, Τ2 for each filament connected to one end is connected to the two power supply lines of the wiring section 30, and the other end of each filament Fl, F2 of the discharge lamp body 11 is connected to one end. Capacitor 13 is connected between connected terminals # 3 and # 4. The wiring section 30 extending from the socket 15 to the power supply circuit 20 has only two wires corresponding to the two terminals Τ 1 and Τ 2, and the circuit of the discharge lamp system including the power supply circuit 20 is also provided. The configuration is the same as in FIG. Therefore, it has a simple configuration in which the number of wirings is minimized. Also, in the configuration shown in FIG. 5, since the capacitor 13 is housed inside the socket 15, the appearance of the discharge lamp 12 can be made compact and the discharge lamp 12 can be easily handled. As a modified example of FIG. 5, as shown in FIG. 6, the adapters 14b and 14c are not provided in the discharge lamp 12 and two sockets 15a and 15b are connected to the discharge lamp main body 11 of the discharge lamp 12. It may be provided corresponding to the bases 11a and 11b. In this case, the capacitor 13 is provided inside one of the sockets 15a (or 15b), and the capacitor 13 is connected between the other ends of the filaments F1 and F2 of the discharge lamp body 11 as shown in the figure. Connection line 11e to be connected is appropriately wired. Also in this case, the number of wires in the wiring portion 30 extending from the sockets 15a and 15b to the power supply circuit 20 is only two, and the configuration is simple with the number of wires being minimized. Also, in the configuration of FIG. 6, since the capacitor 13 is housed inside the socket 15a (or 15b), the appearance of the discharge lamp 12 can be made compact, and the discharge lamp 12 can be easily handled.

FIG. 7 shows another embodiment of the present invention. In the example of FIG. 7, the basic configuration is the same as that of the embodiment of FIG. 2. Each of the filaments F1, F2 bypasses one end and the other end of the filament for each of the filaments F1, F2. The only difference from Fig. 2 is that capacitors C1, C2 are provided for every two AC current bypasses. Thus, by providing the AC current bypass capacitors C 1 and C 2 for each of the filaments F l and F 2. Therefore, the current flowing directly to each of the filaments F1 and F2 at the time of starting the lighting can be suppressed, and the life of the filament can be further extended. The arrangement of these AC current bypass capacitors C l and C 2 is also the same as in the example of FIG. 1, FIG. 4, FIG. 5 or FIG. In the socket or in socket 15 or 15a, 15b.

For example, in the case where the capacitor 13 is accommodated in the base 12a (or 12b) of the discharge lamp 12 as shown in the example of FIG. 1, as shown in FIG. 8 (a), the AC of the first filament F1 is changed. It is preferable that both the current bypass capacitor C1 and the AC current bypass capacitor C2 of the second filament F2 be housed in one base 12a of the discharge lamp 12. In this case, as shown in Fig. 8 (b), if all the capacitors 13, C1 and C2 housed in the base 12a are mounted on the printed circuit board 16, the assembly work at the time of manufacturing becomes difficult. . As another example, as shown in FIG. 8 (c), the AC current bypass capacitor C1 of the first filament F1 is housed in one base 12a of the discharge lamp 12, and the second filament F The second AC current bypass capacitor C 2 may be housed in the other base 12 b of the discharge lamp 12.

Similarly to the above, in the case where the capacitor 13 is housed in the adapter 14a (or 14b) of the discharge lamp 12 as in the example of FIG. 4, as in FIG. Both the AC current bypass capacitor C1 and the AC current bypass capacitor C2 of the second filament F2 may be housed in one adapter 14a (or 14b) of the discharge lamp 12. Alternatively, as in FIG. 8 (c), the AC current bypass capacitor C1 of the first filament F1 is housed in one of the adapters 14a of the discharge lamp 12, and the second filament F2 The AC bypass capacitor C 2 may be housed in the other adapter 14 b of the discharge lamp 12.

For example, in the case where the capacitor 13 is housed in the socket 15 as in the example of FIG. 5, as shown in FIG. 9, the AC current bypass capacitor C 1 of the first filament F 1 and the second filament F The capacitor C 2 for AC current bypass of 2 is stored in the socket 15. Similarly, in the case where the capacitor 13 is housed inside one of the two sockets 15a and 15b as in the example of FIG. The AC current bypass capacitor C1 of the first filament F2 is placed in one socket 15a, and the AC current bypass capacitor C2 of the second filament F2 is placed in the other socket 15b of the discharge lamp 12. It can be stored inside.

Next, an embodiment in which a common ballast can be used in discharge lamps having different ratings will be described with reference to FIGS. 10 to 18. FIG.

In the embodiment shown in FIG. 10, the main body of the discharge lamp 41 includes a glass tube 42c, bases 42a and 42b provided at both ends thereof, and a pair provided inside thereof. Discharge filaments F1, F2. In one of the bases 42a, one power supply terminal T1 connected to one end of the filament F1 and one terminal T3 connected to the other end of the filament F1 are inserted and plugged, respectively. It is provided to be exposed. In the other base 42b, one power supply terminal T2 connected to one end of the filament F2 and one terminal T4 connected to the other end of the filament F2 are plugged in respectively. It is provided exposed in the formula. In each of the bases 42a and 42b, AC current bypass capacitors C1 and C2 that bypass between one end and the other end of each of the filaments F1 and F2 are inserted and connected. CI and C2 are housed inside each base 42a and 42b. That is, in one base 42a, one end of the filament F1 is connected to one end of the capacitor C1 via the internal connection, and the other end of the filament F1 is connected to the capacitor C1 via the internal connection. Connect to the other end of one. In the other base 42b, one end of the filament F2 is connected to one end of the capacitor C2 via the internal connection, and the other end of the filament F2 is connected to the other end of the capacitor C2 via the internal connection. Connect to the end. The capacitors C I and C 2 have the same capacitance.

In the case of FIG. 10, sockets (not shown) ′ to which the discharge lamps 41 are detachably mounted are provided corresponding to both bases 42 a and 42 b. The number of wires of the wiring portion 30 extending from this socket (not shown) to the power supply circuit 20 shown in FIG. 11 is four corresponding to the four terminals T1 to T4. In the configuration of FIG. 10, the capacitors C 1 and C 2 are housed inside the bases 42 a and 42 b of the discharge lamp 41, so that the appearance of the discharge lamp 41 can be made compact, It becomes easy to handle. FIG. 11 shows an example of an electric circuit of a discharge lamp system in which the discharge lamp 41 is connected to a power supply circuit 20. The power supply circuit 20 includes a DC converter 22 for converting the power from the commercial AC power supply 21 to a DC voltage, and an inverter circuit for converting the DC voltage to a predetermined high-frequency voltage, as in the conventional case. 2 and a ballast composed of a series resonance circuit including a choke coil 24 and a capacitor 250. A capacitor 250, which forms a series resonance circuit together with the choke coil 24, is provided so as to be connected between the terminals T3, T4 on the other end side of the filaments F1, F2 in the discharge lamp 41. It has been done.

With this configuration, at the time of lighting start-up in which a power switch (not shown) provided on the side of the power supply circuit 20 is turned on to start power supply to the discharge lamp 41, one power supply terminal Tl and one AC Discharge from the current bypass capacitor C1, one terminal Τ3, through the capacitor 250, through the other terminal Τ4, the other AC current bypass capacitor C2, and the other power supply terminal Τ2. Electric current flows. As described above, by providing the AC current bypass capacitors C 1 and C 2 for each of the filaments F 1 and F 2, it is possible to suppress the current flowing directly to each of the filaments F 1 and F 2 at the time of starting the lighting. As a result, the current directly applied to each of the filaments F1, F2 at the time of starting the lighting is suppressed, and the life of the filaments F1, F2 can be further extended. Further, based on the discharge current flowing through the series resonance circuit including the choke coil 24 and the capacitor 250, the filaments Fl and F2 are preheated, and the sputtering at the time of starting the lighting is suppressed by the filament preheating effect. Lamp life can be extended. When the potential difference between the filaments F 1 and F 2 in the discharge lamp 41 reaches a predetermined discharge start voltage, discharge starts.

In FIG. 10, each capacitor C 1, C 2 is illustrated as being housed separately in the bases 42 a, 42 b, but either one of the bases 42 a (or base 42 b) It may be housed together inside the. As shown in Fig. 12, one power supply terminal T1 and one terminal T3 connected to one end and the other end of one filament F1 are inserted into one base 42a. One power supply that is plugged and exposed and connected to one end and the other end of the other filament F2 The supply terminal T2 and one terminal # 4 are provided to be exposed in a plug-in type. That is, one end and the other end of one filament F 1 are connected to terminals Τ 1 and T 3 via the connection inside the base 42 a, respectively, and one end and the other end of the other filament F 2 are connected to the glass tube 42, respectively. It is connected to terminals T2, Τ4 provided on the side of the base 42a via connection lines 42d, 42e extending along the outside of c. Capacitors C1 and C2 are inserted and connected between one end and the other end of each of the filaments F1 and F2 via internal connections.

A discharge lamp 41 according to another embodiment of the present invention shown in FIG. 13 includes adapters 43 a and 43 b attached to both bases 42 a and 42 b of the discharge lamp body 40. Shows an example of arranging capacitors C1 and C2. In this case, the discharge lamp 41 itself may be manufactured as a total four-terminal type discharge lamp having two terminals at each of the bases 42 a and 42 b at the manufacturing stage. Then, adapters 43a and 43b are attached to such a four-terminal type discharge lamp body 40, and capacitors C1 and C2 are arranged inside the adapters 43a and 43b, respectively. In each of the adapters 43a and 43b, terminals T1 and T3 and terminals T2 and T4 of each filament connected to one end and the other end of each filament F1 and F2 are plugged. Exposed to the formula.

For example, in the adapter 43a attached to one base 42a of the discharge lamp body 40, one end of one filament F1 is connected to one plug-type terminal T1 via one terminal of the base 42a. The other end of the filament F1 is connected to the other plug-type terminal T3 via the other terminal of the base 42a. Then, one end and the other end of the filament F1 are connected to the capacitor C1 via both terminals of the base 42a. In the adapter 43b attached to the other base 42b of the discharge lamp body 40, one end of the other filament F2 is connected to one plug terminal T via one terminal of the base 42b. 2 and the other end of the filament F2 is connected to the other plug-type terminal T4 via the other end of the base 42b. Then, one end and the other end of the filament F2 are connected to the capacitor C2 via both terminals of the base 42b. In the case of FIG. 13 as well, similarly to the discharge lamp 41 shown in FIG. 10, the discharge lamp 41 is detachably mounted. Sockets (not shown) to be attached are provided corresponding to both adapters 43a and 43b. The number of wires of the wiring portion 30 extending from this socket (not shown) to the power supply circuit 20 is four corresponding to the four terminals T1 to T4, and includes the power supply circuit 20 as well. The circuit configuration of the discharge lamp system is the same as in Fig. 11. Also, in the configuration of FIG. 13, since the capacitors CI and C 2 are housed inside both adapters 43a and 43b, the appearance of the discharge lamp 41 can be made compact, and It will be easy. In the example of Fig. 13, no extra processing is required at the stage of manufacturing the discharge lamp body 40, and when attaching the adapters 43a and 43b to the completed discharge lamp body 40, capacitors are required. Since C1 and C2 only need to be stored, there is an advantage that manufacturing is simple.

A discharge lamp 41 according to another embodiment of the present invention shown in FIG. 14 has capacitors C 1 and C 2 in an adapter 43 c attached to one base 42 a of the discharge lamp body 40. The example of arrangement | positioning is shown. Also in this case, the discharge lamp 41 itself may be manufactured as a total four-terminal discharge lamp having two terminals at each of the bases 42 a and 42 b at the manufacturing stage. Then, the adapters 43c and 43d are attached to the four-terminal type discharge lamp body 40, and the capacitors C1 and C2 are placed inside one of the adapters 43c (or the adapter 43d). Place. In each of the adapters 43c and 43d, the terminals T1 and T3 and the terminals T2 and T4 of each filament connected to one end and the other end of the filaments Fl and F2 are plugged in. Exposed.

For example, in an adapter 43c attached to one base 42a of the discharge lamp body 40, one end of one filament F1 is connected to one plug terminal T1 via one terminal of the base 42a. The other end of the filament F1 is connected to the other plug-type terminal T3 via the other terminal of the base 42a. Then, the negative end and the other end of the filament F 1 are connected to the capacitor C 1 via the connection inside the adapter 43 c. In the adapter 43d attached to the other base 42b of the discharge lamp body 40, no plug-type terminal is provided, and one end of the other filament F2 is connected through one terminal of the base 42b. Connecting line 4 3 e extending along the outside of the discharge lamp body 40 Through the connection wire 43e, and further to a plug-type terminal T2 provided on the adapter 43c. Also, the other end of the other filament F 2 is connected to a connection line 43 f extending along the outside of the discharge lamp body 40 via the other terminal of the base 42 b, and further connected to this connection line 43 f. Through the plug-type terminal T4 provided on the adapter 43c. Then, one end and the other end of the filament F2 are connected to the capacitor C2 via the connection inside the adapter 43, respectively.

In the case of FIG. 14, a socket (not shown) to which the discharge lamp 41 is detachably mounted is provided corresponding to one of the adapters 43c. The number of wires of the wiring section 30 extending from this socket (not shown) to the power supply circuit 20 is four corresponding to the four terminals T1 to T4. The circuit configuration of the discharge lamp system including this is the same as in Fig. 11. In the configuration shown in FIG. 14 as well, since the capacitors CI and C2 are housed inside the adapter 43c, the appearance of the discharge lamp 41 can be made compact and easy to handle. In the example of Fig. 14 as well, no extra processing is required at the stage of manufacturing the discharge lamp body 40, and when the adapter 43c is attached to the completed discharge lamp body 40, the capacitors C1, C Since only 2 needs to be stored, there is an advantage that manufacturing is simple.

The discharge lamp device according to one embodiment of the present invention shown in FIG. 15 does not include the capacitors CI and C2 in the discharge lamp 41 itself, and the socket 44 in which the discharge lamp 41 is detachably mounted. The capacitors C 1 and C 2 are provided on the side. In this case, at both ends of the discharge lamp body 40 of the discharge lamp 41, adapters 43d and 43g are provided in the same manner as in Fig. 14, but an adapter 43 instead of the adapter 43c in Fig. 14 The adapter 43 g is configured as a four-terminal plug so that it can be inserted into and removed from the socket 44 without providing the capacitors C 1 and C 2 in g. Capacitors C1 and C2 are provided inside the socket 44. When the 4-terminal plug type adapter 4 3g attached to the discharge lamp body 40 is inserted into the socket 44, the discharge lamp body 40 A power supply terminal T1 connected to one end of one of the filaments F1 is connected to one end of the capacitor C1 via one power supply line of the wiring section 30, and is connected to the other end of the filament F1. The connected terminal T3 is connected to the other end of the capacitor C1 through one wire of the wiring portion 30. Connected. Further, a power supply terminal T2 connected to one end of the other filament F2 of the discharge lamp body 40 is connected to one end of the capacitor C2 via the remaining one power supply line of the wiring section 30. A terminal T4 connected to the other end of the filament F2 is connected to the other end of the capacitor C2 via the remaining one wiring of the wiring part 30. The number of wires of the wiring portion 30 extending from the socket 44 to the power supply circuit 20 is four corresponding to the four terminals T1 to T4, and the discharge lamp including the power supply circuit 20 is also provided. The circuit configuration of the system is the same as in Fig. 11. Also in the configuration shown in FIG. 15, since the capacitors C 1 and C 2 are housed inside the socket 44, the external appearance of the discharge lamp 41 can be made compact and easy to handle.

As a modified example of FIG. 15, as shown in FIG. 16, two sockets 44 a and 44 b are provided in the discharge lamp 41 without the adapters 43 d and 43 g. The discharge lamp 41 may be provided corresponding to each base 42 a, 42 b of the discharge lamp body 40. In that case, capacitors C I and C 2 are provided inside both sockets 44 a and 44 b. That is, in the socket 44a, the capacitor C1 is provided so as to connect one end and the other end of one filament F1 of the discharge lamp body 40. In the socket 44b, the capacitor C2 is provided to connect one end and the other end of the filament F2 of the discharge lamp body 40 to the pond. Even in this case, since the capacitors C1 and C2 are housed inside the sockets 44a and 44b, the appearance of the discharge lamp 41 can be made compact and easy to handle.

FIG. 17 shows another embodiment of the present invention. In the example of FIG. 17, the basic configuration is the same as that of the embodiment of FIG. 11, and among the capacitors C 1 and C 2 provided for each filament F 1 and F 2 of the discharge lamp 41, It differs from FIG. 11 only in that one capacitor C 1 is provided on the side of the power supply circuit 20. As shown in the figure, one end of a capacitor C 1 is connected to an internal wiring 27 a connected to a power supply terminal T 1 connected to one end of one filament F 1 of the discharge lamp 41, and the filament F 1 The other end of the capacitor C1 is connected to the internal wiring 27b connected to the terminal T3 connected to the other end. Thus, the AC current bypass capacitor C1 that bypasses one end and the other end of one filament F1 of the discharge lamp 41 is provided on the side of the power supply circuit 20. However, as in the case of Fig. 11, the currents flowing directly to the filaments F1 and F2 at the time of start-up can be suppressed by the AC current bypass capacitors C1 and C2, as in the case of Fig. 11, and the filament life can be reduced. Can be extended further.

FIG. 18 shows yet another embodiment of the present invention. In the example of FIG. 18, the basic configuration is the same as that of the embodiment of FIG. 11, and the transformer T and the winding C for detecting the discharge current, and the dimming control circuit 28 are connected to the power supply circuit 20. The only difference is that it is provided on the side of. The primary winding Tr1 of the transformer T is connected in series to the resonance capacitor 250, and the detection signal induced in the secondary winding Tr2 of the transformer T is input to the dimming control circuit 28. You. The winding C is connected in series between the power supply terminal T 2 of the discharge lamp 41 and the inverter circuit 23. The winding C has the same number of turns as the primary winding Tr 1 of the transformer T, and the winding direction is in the opposite phase. The electromotive force generated in the primary winding Tr1 is canceled by the winding C having the opposite phase. With this configuration, when power is supplied to the discharge lamp 41 by turning on a power switch (not shown) provided on the side of the power supply circuit 20 according to the current flowing through the primary winding Tr 1 of the transformer T, As a result, an induced voltage is generated in the secondary winding Tr 2, and the dimming control circuit 28 is provided with a discharge current detection signal. The dimming control circuit 28 controls the dimming control of the discharge lamp 41 by controlling the inverter circuit 23 according to the discharge current detection signal.

In each of the embodiments, since each of the capacitors 13, C 1, and C 2 has a small capacity that is optimally determined by design, the capacitors 13, C 1, and C 2 are compact in the base of the discharge lamp, the adapter of the discharge lamp, or the socket. It can be stored in Also, in any embodiment of the type in which the capacitor 13 or C1, C2 is housed in the base of the discharge lamp, in the adapter of the discharge lamp or in the socket, the same as in the example of Fig. 8 (b) The capacitor 13 or C 1, C 2 housed in the base, the adapter, or the socket may be mounted on a printed circuit board, so that the manufacturing and assembling work is reduced and the size is reduced. Contribute.

The type of the discharge lamp to which the present invention is applied may be any type, such as an ultraviolet discharge lamp or a fluorescent lamp, depending on the purpose of use.

As described above, according to one aspect of the present invention, a discharge including a pair of discharge filaments In a lamp, a discharge lamp, a discharge lamp device, or a discharge lamp system having a single power supply terminal for each filament connected to one end of each filament and a capacitor connected between the other ends of the filaments is provided. Provided, the number of wires between the power supply circuit and the discharge lamp body can be reduced to a minimum of two wires connected to one power supply terminal for each filament, Preheat current at one of the power supply terminals, one end of one filament, the other end of the one filament, a capacitor, the other end of the other filament, the other end of the other filament, and the other power supply terminal Flow, so that sparkling at the start of lighting can be suppressed by the filament preheating effect, and the lamp life can be extended. Achieve the results. Also, by providing an AC current bypass capacitor for each filament, the current flowing directly to each filament can be suppressed, and the life of the filament can be further extended. In addition, since the capacitor and the capacitor for AC current bypass are housed in the base of the discharge lamp, in the adapter of the discharge lamp, or in the socket, the appearance of the discharge lamp can be made compact and It can be easy.

According to another aspect of the present invention, there is provided a discharge lamp body including a pair of discharge filaments, and an AC current bypass for each filament for bypassing between one end and the other end of the filament for each filament. Because of the provision of a capacitor for use, a superior effect is obtained that a common ballast can be used in discharge lamps having different ratings without shortening the filament life.

Claims

Scope of Claim 1. Discharge lamp body including a pair of discharge filaments,

A base provided in the discharge lamp main body, wherein one power supply terminal for each filament connected to one end of each of the filaments is exposed; and the base is housed inside the base. A capacitor connected between the other ends of the filaments;

Discharge lamp comprising:

2. A discharge lamp body including a pair of discharge filaments,

An adapter attached to the discharge lamp body, wherein one adapter for each filament connected to one end of each filament is exposed;

A capacitor housed inside the adapter and connected between the other ends of the filaments;

Discharge lamp comprising:

3. A discharge lamp including a pair of discharge filaments, wherein a terminal connected to each end of each filament is exposed;

A socket to which the discharge lamp is detachably attached, wherein one terminal for each filament connected to one end of each filament of the discharge lamp is connected to a power supply line as a power supply terminal. ,

A capacitor housed inside the socket and connected between terminals connected to the other ends of the filaments of the discharge lamp;

A discharge lamp device comprising:

4. An AC current bypass capacitor for each filament, which bypasses between one end and the other end of the filament for each filament. 4. The discharge lamp or discharge lamp device according to any one of 3 to 3.

5. The AC current bypass capacitor is housed inside a base of the discharge lamp body, inside an adapter attached to the discharge lamp body, or inside a socket to which the discharge lamp is detachably attached. The discharge lamp according to claim 4 or

6. The discharge lamp or the discharge lamp device according to any one of claims 1 to 5,

Power supply wiring connected to one power supply terminal for each filament,

And a power supply circuit for supplying power to the discharge lamp via the power supply wiring.

7. A discharge lamp body including a pair of discharge filaments,

An AC current bypass capacitor for each filament, bypassing between one end and the other end of the filament for each filament;

Discharge lamp comprising:

8. The discharge lamp according to claim 7, wherein at least one of the AC current bypass capacitors is housed in a base provided in the discharge lamp body.

9. The discharge lamp according to claim 7, further comprising an adapter attached to the discharge lamp body, wherein at least one of the AC current bypass capacitors is housed inside the adapter.

10. The discharge lamp according to any one of claims 7 to 9,

A socket to which the discharge lamp is detachably attached;

At least one of the AC current bypass capacitors inside the socket. Discharge lamp device that houses one.

11. The discharge lamp or the discharge lamp device according to any one of claims 7 to 10, and a power supply wiring connected to one power supply terminal for each filament.

A power supply circuit for supplying power to the discharge lamp through the power supply wiring, and at least one of the AC current bypass capacitors is housed on the side of the power supply circuit. .