CA1239436A - High-pressure discharge lamp - Google Patents
High-pressure discharge lampInfo
- Publication number
- CA1239436A CA1239436A CA000475385A CA475385A CA1239436A CA 1239436 A CA1239436 A CA 1239436A CA 000475385 A CA000475385 A CA 000475385A CA 475385 A CA475385 A CA 475385A CA 1239436 A CA1239436 A CA 1239436A
- Authority
- CA
- Canada
- Prior art keywords
- lamp
- sleeve
- lamp cap
- cooling member
- neck
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/56—One or more circuit elements structurally associated with the lamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
- H01J61/523—Heating or cooling particular parts of the lamp
Abstract
ABSTRACT
The invention relates to a high-pressure disk charge lamp comprising a discharge vessel enclosed by an outer envelope provided with a neck which is adjoined by a sleeve of a lamp cap. The lamp cap accommodates an electrical circuit provided with a semiconductor switch-ing element which controls the discharge current in the operating condition of the lamp. The semiconductor switching element is provided with a cooling member which is preferably secured to the sleeve. Consequently, it is possible to use the lamp according to the invention with-out further expedients in combination with a stabiliza-tion ballast not adapted to the lamp.
The invention relates to a high-pressure disk charge lamp comprising a discharge vessel enclosed by an outer envelope provided with a neck which is adjoined by a sleeve of a lamp cap. The lamp cap accommodates an electrical circuit provided with a semiconductor switch-ing element which controls the discharge current in the operating condition of the lamp. The semiconductor switching element is provided with a cooling member which is preferably secured to the sleeve. Consequently, it is possible to use the lamp according to the invention with-out further expedients in combination with a stabiliza-tion ballast not adapted to the lamp.
Description
~F~,33~f~3~
The invention relates to a high-pressure disk charge lamp comprising a discharge vessel in which are arranged two electrodes, between which a discharge current flows in the operating condition of the lamp, which vessel is enclosed by an outer envelope provided with a neck which is adjoined by a sleeve of a lamp cap.
Lamps of the kind mentioned in the opening pane-graph are frequency used nowadays both in public illuming anion and in illumination in residential rooms. These lamps lo have the great advantage of a comparatively high luminous flux with small dimensions as compared with incandescent lamps and low-pressure discharge lamps. The filling can consist of a combination ox one or more metal vapors and one or more rare gases, or of one or more metal halides, mercury and rare gas.
High-pressure discharge lamps are generally operated in combination with a stabilization ballast. The value of the impedance of the ballast should be chosen in correspondence with the discharge current through the lamp in the operating condition. Consequently it is not posy sidle to operate in an existing equipment for operating a given kind of high-pressure discharge lamp a tamp of a dip-fervent kind without making modifications to the existing equipment. This is a disadvantage with a view to the pro-gressive increase in luminous efficacy in high pressure discharge lamps and to the attempts to obtain a further saying in energy. The invention has for its object to provide a means for eliminating the necessity to make modifications to the existing equipment.
For this purpose, according to the invention, a lamp of the kind mentioned in the opening paragraph is Jo characterized in that the lamp cap accommodates an electric , ", Jo eel circuit provided with at least one semiconductor switching element which controls in the operating condo-lion of the lamp the discharge current and which is pro voided with a cooling member.
sty the use of a switching element controlling the discharge current, it is possible to operate the lamp in an equipment provided with a stabilization ballast not designed for the relevant lamp. ennui the switching eye mint is constructed as a semiconductor switching element, the advantage is obtained of small dimensions and hence of the possibility of being incorporated in the lamp cap.
It is a surprise to find that this can be realized in pray-lice when the semiconductor switching element is provided with a cooling member.
Lamps provided in the lamp cap with an electrical circuit comprising one or more semiconductor elements are known per so However, in all cases these elements are non-switching elements, at least elements not switching in the operating condition of the lamp; see, for example, Applicant's United States Patent 4,447,759 - issued May 8, 1984. It is known that a switching semiconductor element dissipates a power having a value of approximately 1 W/A.
Experiments have shown that such a power dissipation may lead in a lamp cap of a high-pressure discharge lamp in the operating condition to such high temperatures that the them-portray permissible for a semiconductor element is exceeded.
A circuit arrangement provided with a switching element intended to control the discharge current during the operation of a discharge lamp is known per so in dip ; circuits. Such a circuit, in which the switching element is constructed as a semiconductor switching element, is known from UPS 3,925,705. The use of the known circuits has the disadvantage that solely means are provided for a separate connection to the equipment in which the lamp should be operated.
In an advantageous embodiment of a lamp accord-in to the invention, the cooling member is a metal body I
PUN 10942 3 11.11.1984 which is directly connected to the sleeve of the lamp cap.
It has to be found that a sufficient heat dyes-potion of the semiconductor circuit element can be obtained in a very simple manner with slush a construction of the cooling member in spite of the fact that in the operating condition the sleeve of the lamp cap is generally enclosed entirely by the lamp holder, as a result of which the heat emission of the sleeve is limited.
In a further advantageous embodiment of a lamp according to the invention, the metal body comprises a plate-shaped part which is located near the neck of the outer envelope, the major surfaces of the plate-shaped part being substantially at right angles to the longitude-net axis of the lamp cap. In this manner, the plate shaped part of -the metal body acts not only as a heat-conducting cooling member for the semiconductor circuit element, but also as a heat-reflecting member for thermal radiation originating from the discharge vessel.
Many possibilities are imaginable for securing the metal body to the lamp cap sleeve. For example, the body may be directly welded or soldered to the sleeve. In an advantageous embodiment, the metal body has a flanged edge which is secured at the area of the connection of the outer envelope to the sleeve of the lamp cap between the neck and the sleeve. This has the advantage that the cool-in member can be secured to the neck of the outer envelope before the lamp cap is mounted. In this manner, the cooling member can be accurately positioned. It is also comparatively simple to mount the elements of the electrical circuit Although it is to be preferred with a view to thermal conduction that the flanged edge extends over the whole circumference of the sleeve a Lund edge extending over only Rent of the circumference of the sleeve also forms a practically usable construction.
In a further embodiment of a lamp according to - the invention, in which the sleeve of the lamp cap compare-sues an isolating bead the metal body is secured by means .
PUN 10942 4 11011.1984 of an edge portion between the sleeve and the insulating bead of the lamp cap Also in a construction of this form, the edge portion may cover the whole circumference or only part of the circumference of the sleeve of thy lamp 5 cap. This embodiment has the advantage that the electrical circuit can be manufactured separately from the outer envelope, as a result of which the risk of rupture of the outer envelope is reduced.
In another embodiment, the cooling member is for ill the major part plate-shaped, whilst the circumference can be - resiliently reduced and the cooling member has such dimensions that it bears on the sleeve of the lamp cap in the sleeve, in a self-clamping manner, the major surfaces of the cooling member being substantially at right angles 15 to the longitudinal axis of the lamp cap sleeve. An ad van-tare of this embodiment is that there can be started from the manufacture of the electrical circuit with cooling member separated from the outer envelope of the lamp on the one hand and from the lamp cap on the other hand. Due to the fact that the cooling member is arranged in a self-clamping manner after this member has been arranged in the sleeve of the lamp cap, a good direct contact is ensured, which also provides mechanical strength.
An embodiment of a lamp according to the invention will be described with reference to the drawings In the drawings:
Figure I is a schematic side elevation of the lamp with the greater part outer envelope of the lamp shown broken away 9 Figure 2 is a detailed representation of a sectional view of the lamp cap of the lamp shown in Figure 1, Figure 3 is a plan view of a metal cooling member, used in -the lamp shown in Figures 1 and I
Figure 4 shows a plan view of another cooling member, and Figure 5 shows the electric circuit diagram of a circuit arrangement in the lamp cap of the lamp.
I
PUN 10942 5 11.11.1984 In Figure 1, reference numeral 1 designates an outer envelope of the lamp having a neck 10 adjoined by a sleeve 20 of a lamp cap 2. The outer envelope encloses a discharge vessel I The discharge vessel 3 is provided with two electrodes 4 and 5, between which a disk charge current flows in the operating condition of the lamp The electrode 4 is connected by means of a metal strip 6 to a rigid supply conductor 7. The electrode 5 is electric gaily connected through a metal strip 8 to a rigid supply 10 conductor Jo In Figure 2, parts corresponding to those in Figure 1 are designated by the same reference numerals.
One end of the sleeve 20 of the lamp cap 2 fits around the neck 10 of the outer envelope 10 At the other end of 15 the sleeve 20 there is arranged an insulating bead 21 prove-dyed with a connection contact 22. A recess containing an electrical conductor 90 extends through the insulating bead 21, this conductor 90 forming an electrical connection between the current supply conductor 9 and the connection I contact 22. The lamp cap 2 further accommodates near the - neck 10 and substantially at right angles to the lunate-dial axis of the lamp cap a plate-shaped part 24 of a metal cooling member 12 which is provided with a flanged edge 25 which embraces the neck lo of the outer envelope and is 25 directly connected to the sleeve ZOO thus secured at the area of the connection of the neck of the outer envelope to the sleeve of the lamp cap between the neck and the sleeve.
The flanged edge 25 is preferably in contact with the sleeve 20 substant~lly along the whole circumference of the sleeve 30 201 This guarantees a good thermal conduction. By means of a clamp 31, a semiconductor switching element 26 is mounted on the side of the plate-shaped part 24 remote from the neck 10. Furthermore, a mounting plate 28 is mounted on the side of the plate-shaped part 24 remote from the 35 neck lo and bears components 27 of the circuit arrangement.
In a manner not shown further, the circuit arrangement is electrically connected to the sleeve 20. An electrical .
PUN 10942 6 11~11.1984 conductor 70 ensures that an electrical connection it formeclbetween the circuit arrangement and the current supply conductor I
The plate-shaped part 24 of the cooling member 12, of which a plane view is shown in Figure 3 (not to scale), is provided with a recess 30 through which in the mounted state is passed an exhaust tube 11 (Fig I of the lamp, while the conductors 90 and 70 are also passed through this recess. Moreover, the plate-shaped part 24 is provided with a recess 32 for locking the clamp 31 (Fig. 2) against displacement and so securing the semiconductor switching element to be arranged (Figure 23.
Figure 4 shows another cooling member not shown to scale, which is for the major part plate-shaped, while the circumference can be resiliently reduced. or this purpose, -the plate-shaped part 24 is provided with a Starr shaped part 33 which is resiliently displaceable with small deviations with respect to the plate-shaped part 24. When the cooling member is arranged in a sleeve of a lamp cap and substantially at right angles to the longitudinal axis of the lamp cap and this sleeve has an inner dimension which is slightly smaller than the outer dimension of the cooling member 12, this leads to the cooling member bearing on the sleeve in a self-clamping manner. The recess 30 between the plate-shaped part 24 and the strip-shaped part 33 serves, when mounted in the lamp, to receive the exhaust tube and the electrical conductors. The recess 32 in this embodiment has the same function as in the embody-mint show in figure 3.
Figure 5 shows an electric circuit diagram of circuit arrangement, in which a connection terminal 700 is connected to the conductor 70 and a connection terminal 200 is connected to the sleeve 20. The connection terminals 700 and 200 are interconnected through a parallel arranged mint of the semiconductor switching element 26 and a temperaturerdependent resistor 47. A control electrode aye I 3Ç6 PUN 10942 7 11.11.1984 of the semiconductor switching element 26 is connected to a junction of a series arrangement of a resistor 45 and two ever diodes 46 arranged in series opposition. The series arrangement is directly connected between the connection terminals 200 and 700.
Furthermore, the control electrode aye is connect ted through a resistor 44 and a dice 43 to a voltage divider between the connection terminals 700 and 200 comprising a series arrangement of resistors 40 and 41. The resistor 40 10 is shunted by a capacitor 42. The circuit arrangement shown is a fixedly adjusted circuit arrangement for listing the average lamp current, whose operation is as follows. When the lamp is started the circuit arrangement it short circuited between the terminals 200 and 700 through the temperature-5 dependent resistor I In the operating condition, the valueGf the tempera~ure-dependent resistor has increased so that as a result a "keep-alive" current through the lamp is maintained in the non-conducting state ox the switching element 26. Such a keep-alive current maintains the ionize-20 lion of the filling of the discharge vessel, as a result ouch the lamp reignites satisfactorily as soon as the switching element 26 becomes conducting.
In the operating condition, a variable voltage is applied across the terminals 200 and 700. When this I voltage increases, the voltage at the capacitor 42 will also increase. us soon as this voltage reaches the breakdown voltage of the dice 43, the dice Lo becomes conducting and the capacitor 42 is discharged via the dice 43 and the resistors Lo and 46. A voltage pulse occurs 30 across the resistor 45, which ensures that the switching element 26 is brought into the conducting state. In the conducting state the switching element 26 worms a connect lion substantially without impedance between the connection terminals 200 and 700 and the current through the 35 lamp will be limited by the stabilization ballast of the equipment in which the lamp is operated. The switching , ,.
PUN 10942 8 11.11.1984 clement 26 remains conducting until the current has fallen to approximately 0 A after which in the opposite phase the cycle it repeated.
The firing moment is determined by the resistance ratio of the resistors 40 and 41 and by the capacitor 4Z.
In a practical embodiment, the circuit arrangement was dimensioned as follows:
Resistor 40 82 k So Resistor 41 82 k Q
10 Resistor 44 22 k Q
Resistor 45 100 Q
Resistor 47 12n at 300 K
12Q k at l~50 K
Capacitor 42 lo no 15 Dice 43 Breakdown voltage 32 V
Zoner diode 46 breakdown voltage 430 V
Semiconductor switching element 26 Trial BY 137~
In a practical lamp provided with a circuit arrangement of the kind described above, the trial BY 137
The invention relates to a high-pressure disk charge lamp comprising a discharge vessel in which are arranged two electrodes, between which a discharge current flows in the operating condition of the lamp, which vessel is enclosed by an outer envelope provided with a neck which is adjoined by a sleeve of a lamp cap.
Lamps of the kind mentioned in the opening pane-graph are frequency used nowadays both in public illuming anion and in illumination in residential rooms. These lamps lo have the great advantage of a comparatively high luminous flux with small dimensions as compared with incandescent lamps and low-pressure discharge lamps. The filling can consist of a combination ox one or more metal vapors and one or more rare gases, or of one or more metal halides, mercury and rare gas.
High-pressure discharge lamps are generally operated in combination with a stabilization ballast. The value of the impedance of the ballast should be chosen in correspondence with the discharge current through the lamp in the operating condition. Consequently it is not posy sidle to operate in an existing equipment for operating a given kind of high-pressure discharge lamp a tamp of a dip-fervent kind without making modifications to the existing equipment. This is a disadvantage with a view to the pro-gressive increase in luminous efficacy in high pressure discharge lamps and to the attempts to obtain a further saying in energy. The invention has for its object to provide a means for eliminating the necessity to make modifications to the existing equipment.
For this purpose, according to the invention, a lamp of the kind mentioned in the opening paragraph is Jo characterized in that the lamp cap accommodates an electric , ", Jo eel circuit provided with at least one semiconductor switching element which controls in the operating condo-lion of the lamp the discharge current and which is pro voided with a cooling member.
sty the use of a switching element controlling the discharge current, it is possible to operate the lamp in an equipment provided with a stabilization ballast not designed for the relevant lamp. ennui the switching eye mint is constructed as a semiconductor switching element, the advantage is obtained of small dimensions and hence of the possibility of being incorporated in the lamp cap.
It is a surprise to find that this can be realized in pray-lice when the semiconductor switching element is provided with a cooling member.
Lamps provided in the lamp cap with an electrical circuit comprising one or more semiconductor elements are known per so However, in all cases these elements are non-switching elements, at least elements not switching in the operating condition of the lamp; see, for example, Applicant's United States Patent 4,447,759 - issued May 8, 1984. It is known that a switching semiconductor element dissipates a power having a value of approximately 1 W/A.
Experiments have shown that such a power dissipation may lead in a lamp cap of a high-pressure discharge lamp in the operating condition to such high temperatures that the them-portray permissible for a semiconductor element is exceeded.
A circuit arrangement provided with a switching element intended to control the discharge current during the operation of a discharge lamp is known per so in dip ; circuits. Such a circuit, in which the switching element is constructed as a semiconductor switching element, is known from UPS 3,925,705. The use of the known circuits has the disadvantage that solely means are provided for a separate connection to the equipment in which the lamp should be operated.
In an advantageous embodiment of a lamp accord-in to the invention, the cooling member is a metal body I
PUN 10942 3 11.11.1984 which is directly connected to the sleeve of the lamp cap.
It has to be found that a sufficient heat dyes-potion of the semiconductor circuit element can be obtained in a very simple manner with slush a construction of the cooling member in spite of the fact that in the operating condition the sleeve of the lamp cap is generally enclosed entirely by the lamp holder, as a result of which the heat emission of the sleeve is limited.
In a further advantageous embodiment of a lamp according to the invention, the metal body comprises a plate-shaped part which is located near the neck of the outer envelope, the major surfaces of the plate-shaped part being substantially at right angles to the longitude-net axis of the lamp cap. In this manner, the plate shaped part of -the metal body acts not only as a heat-conducting cooling member for the semiconductor circuit element, but also as a heat-reflecting member for thermal radiation originating from the discharge vessel.
Many possibilities are imaginable for securing the metal body to the lamp cap sleeve. For example, the body may be directly welded or soldered to the sleeve. In an advantageous embodiment, the metal body has a flanged edge which is secured at the area of the connection of the outer envelope to the sleeve of the lamp cap between the neck and the sleeve. This has the advantage that the cool-in member can be secured to the neck of the outer envelope before the lamp cap is mounted. In this manner, the cooling member can be accurately positioned. It is also comparatively simple to mount the elements of the electrical circuit Although it is to be preferred with a view to thermal conduction that the flanged edge extends over the whole circumference of the sleeve a Lund edge extending over only Rent of the circumference of the sleeve also forms a practically usable construction.
In a further embodiment of a lamp according to - the invention, in which the sleeve of the lamp cap compare-sues an isolating bead the metal body is secured by means .
PUN 10942 4 11011.1984 of an edge portion between the sleeve and the insulating bead of the lamp cap Also in a construction of this form, the edge portion may cover the whole circumference or only part of the circumference of the sleeve of thy lamp 5 cap. This embodiment has the advantage that the electrical circuit can be manufactured separately from the outer envelope, as a result of which the risk of rupture of the outer envelope is reduced.
In another embodiment, the cooling member is for ill the major part plate-shaped, whilst the circumference can be - resiliently reduced and the cooling member has such dimensions that it bears on the sleeve of the lamp cap in the sleeve, in a self-clamping manner, the major surfaces of the cooling member being substantially at right angles 15 to the longitudinal axis of the lamp cap sleeve. An ad van-tare of this embodiment is that there can be started from the manufacture of the electrical circuit with cooling member separated from the outer envelope of the lamp on the one hand and from the lamp cap on the other hand. Due to the fact that the cooling member is arranged in a self-clamping manner after this member has been arranged in the sleeve of the lamp cap, a good direct contact is ensured, which also provides mechanical strength.
An embodiment of a lamp according to the invention will be described with reference to the drawings In the drawings:
Figure I is a schematic side elevation of the lamp with the greater part outer envelope of the lamp shown broken away 9 Figure 2 is a detailed representation of a sectional view of the lamp cap of the lamp shown in Figure 1, Figure 3 is a plan view of a metal cooling member, used in -the lamp shown in Figures 1 and I
Figure 4 shows a plan view of another cooling member, and Figure 5 shows the electric circuit diagram of a circuit arrangement in the lamp cap of the lamp.
I
PUN 10942 5 11.11.1984 In Figure 1, reference numeral 1 designates an outer envelope of the lamp having a neck 10 adjoined by a sleeve 20 of a lamp cap 2. The outer envelope encloses a discharge vessel I The discharge vessel 3 is provided with two electrodes 4 and 5, between which a disk charge current flows in the operating condition of the lamp The electrode 4 is connected by means of a metal strip 6 to a rigid supply conductor 7. The electrode 5 is electric gaily connected through a metal strip 8 to a rigid supply 10 conductor Jo In Figure 2, parts corresponding to those in Figure 1 are designated by the same reference numerals.
One end of the sleeve 20 of the lamp cap 2 fits around the neck 10 of the outer envelope 10 At the other end of 15 the sleeve 20 there is arranged an insulating bead 21 prove-dyed with a connection contact 22. A recess containing an electrical conductor 90 extends through the insulating bead 21, this conductor 90 forming an electrical connection between the current supply conductor 9 and the connection I contact 22. The lamp cap 2 further accommodates near the - neck 10 and substantially at right angles to the lunate-dial axis of the lamp cap a plate-shaped part 24 of a metal cooling member 12 which is provided with a flanged edge 25 which embraces the neck lo of the outer envelope and is 25 directly connected to the sleeve ZOO thus secured at the area of the connection of the neck of the outer envelope to the sleeve of the lamp cap between the neck and the sleeve.
The flanged edge 25 is preferably in contact with the sleeve 20 substant~lly along the whole circumference of the sleeve 30 201 This guarantees a good thermal conduction. By means of a clamp 31, a semiconductor switching element 26 is mounted on the side of the plate-shaped part 24 remote from the neck 10. Furthermore, a mounting plate 28 is mounted on the side of the plate-shaped part 24 remote from the 35 neck lo and bears components 27 of the circuit arrangement.
In a manner not shown further, the circuit arrangement is electrically connected to the sleeve 20. An electrical .
PUN 10942 6 11~11.1984 conductor 70 ensures that an electrical connection it formeclbetween the circuit arrangement and the current supply conductor I
The plate-shaped part 24 of the cooling member 12, of which a plane view is shown in Figure 3 (not to scale), is provided with a recess 30 through which in the mounted state is passed an exhaust tube 11 (Fig I of the lamp, while the conductors 90 and 70 are also passed through this recess. Moreover, the plate-shaped part 24 is provided with a recess 32 for locking the clamp 31 (Fig. 2) against displacement and so securing the semiconductor switching element to be arranged (Figure 23.
Figure 4 shows another cooling member not shown to scale, which is for the major part plate-shaped, while the circumference can be resiliently reduced. or this purpose, -the plate-shaped part 24 is provided with a Starr shaped part 33 which is resiliently displaceable with small deviations with respect to the plate-shaped part 24. When the cooling member is arranged in a sleeve of a lamp cap and substantially at right angles to the longitudinal axis of the lamp cap and this sleeve has an inner dimension which is slightly smaller than the outer dimension of the cooling member 12, this leads to the cooling member bearing on the sleeve in a self-clamping manner. The recess 30 between the plate-shaped part 24 and the strip-shaped part 33 serves, when mounted in the lamp, to receive the exhaust tube and the electrical conductors. The recess 32 in this embodiment has the same function as in the embody-mint show in figure 3.
Figure 5 shows an electric circuit diagram of circuit arrangement, in which a connection terminal 700 is connected to the conductor 70 and a connection terminal 200 is connected to the sleeve 20. The connection terminals 700 and 200 are interconnected through a parallel arranged mint of the semiconductor switching element 26 and a temperaturerdependent resistor 47. A control electrode aye I 3Ç6 PUN 10942 7 11.11.1984 of the semiconductor switching element 26 is connected to a junction of a series arrangement of a resistor 45 and two ever diodes 46 arranged in series opposition. The series arrangement is directly connected between the connection terminals 200 and 700.
Furthermore, the control electrode aye is connect ted through a resistor 44 and a dice 43 to a voltage divider between the connection terminals 700 and 200 comprising a series arrangement of resistors 40 and 41. The resistor 40 10 is shunted by a capacitor 42. The circuit arrangement shown is a fixedly adjusted circuit arrangement for listing the average lamp current, whose operation is as follows. When the lamp is started the circuit arrangement it short circuited between the terminals 200 and 700 through the temperature-5 dependent resistor I In the operating condition, the valueGf the tempera~ure-dependent resistor has increased so that as a result a "keep-alive" current through the lamp is maintained in the non-conducting state ox the switching element 26. Such a keep-alive current maintains the ionize-20 lion of the filling of the discharge vessel, as a result ouch the lamp reignites satisfactorily as soon as the switching element 26 becomes conducting.
In the operating condition, a variable voltage is applied across the terminals 200 and 700. When this I voltage increases, the voltage at the capacitor 42 will also increase. us soon as this voltage reaches the breakdown voltage of the dice 43, the dice Lo becomes conducting and the capacitor 42 is discharged via the dice 43 and the resistors Lo and 46. A voltage pulse occurs 30 across the resistor 45, which ensures that the switching element 26 is brought into the conducting state. In the conducting state the switching element 26 worms a connect lion substantially without impedance between the connection terminals 200 and 700 and the current through the 35 lamp will be limited by the stabilization ballast of the equipment in which the lamp is operated. The switching , ,.
PUN 10942 8 11.11.1984 clement 26 remains conducting until the current has fallen to approximately 0 A after which in the opposite phase the cycle it repeated.
The firing moment is determined by the resistance ratio of the resistors 40 and 41 and by the capacitor 4Z.
In a practical embodiment, the circuit arrangement was dimensioned as follows:
Resistor 40 82 k So Resistor 41 82 k Q
10 Resistor 44 22 k Q
Resistor 45 100 Q
Resistor 47 12n at 300 K
12Q k at l~50 K
Capacitor 42 lo no 15 Dice 43 Breakdown voltage 32 V
Zoner diode 46 breakdown voltage 430 V
Semiconductor switching element 26 Trial BY 137~
In a practical lamp provided with a circuit arrangement of the kind described above, the trial BY 137
2 is mounted on a copper plate-shaped part of a cooling - member 12 which is provided with a flanged edge of steel, which is secured to the neck 10 of the outer envelope 1 by means of cement. The flanged edge 25 of the cooling member 12 is provided with screw-thread, on which the sleeve of the lamp is secured The lamp is suitable for operation with a supply source at 220 TV 50 Ho and dissipates 200 W in the operating condition The lamp is connected in series with a stabilization ballast suitable for operation of a known high-pressure discharge lamp of 250 We The discharge vessel 3 has a filling consisting of an excess of amalgam comprising 80 /0 by weight of Hug and 20 /0 by weight of No and xenon at a pressure of 33.3 spa at 300 K. In the operating condition of the lamp the temperature of the trial is 110C at an ambient temperature of approximately kiwi The maximum permissible temperature for the trial is 125C. The lamp has a luminous flux of 250Q0 lumen which corresponds to the luminous flux of I
PUN 10942 9 11.1101984 a conventional high-pressure sodium discharge lamp of 250 W containing xenon as starting gas.
In the case of another lamp, the lamp dissipates in the operating condition a power of 320 W
S with operation at a stabilization ballast suitable for operation of a known 400 W high-pressure discharge lamp The filling of the discharge vessel contains besides an excess of amalgam comprising 80 % by weight of Hug and 20 /0 by weight of Nay also xenon at a pressure of 27 spa at 300 lo Jo The temperature of the trial is 118C at an ambient temperature of approximately 23 C0 The luminous efficacy emitted by the lamp is 135 low Jo 35
PUN 10942 9 11.1101984 a conventional high-pressure sodium discharge lamp of 250 W containing xenon as starting gas.
In the case of another lamp, the lamp dissipates in the operating condition a power of 320 W
S with operation at a stabilization ballast suitable for operation of a known 400 W high-pressure discharge lamp The filling of the discharge vessel contains besides an excess of amalgam comprising 80 % by weight of Hug and 20 /0 by weight of Nay also xenon at a pressure of 27 spa at 300 lo Jo The temperature of the trial is 118C at an ambient temperature of approximately 23 C0 The luminous efficacy emitted by the lamp is 135 low Jo 35
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A high-pressure discharge lamp comprising a dis-charge vessel in which are arranged two electrodes, between which a discharge current flows in the operating condition of the lamp, which vessel is enclosed by an outer envelope provided with a neck which is adjoined by a sleeve of a lamp cap, characterized in that the lamp cap accommodates an electrical circuit provided with at least one semicon-ductor switching element which controls the discharge cur-rent in the operating condition of the lamp and which is provided with means for transferring heat from said element to said sleeve by thermal conduction, said means for trans-ferring comprising a body which is a cooling member.
2. A lamp as claimed in Claim 1, characterized in that the cooling member is a metal body which is directly connected to the sleeve of the lamp cap.
3. A lamp as claimed in Claim 2, characterized in that the metal body comprises a plate-shaped part which is situated near the neck of the outer envelope the major sur-faces of the plate-shaped part being substantially at right angles to the longitudinal axis of the lamp cap.
4. A lamp as claimed in Claim 3, characterized in that the cooling member has a flanged edge which is secured at the area of the connection of the neck of the outer envelope to the sleeve of the lamp cap between the neck and the sleeve.
5. A lamp as claimed in Claim 2 or 3, in which the sleeve of the lamp cap has an insulating bead, character-ized in that the metal body is secured by means of an edge portion between the sleeve and the insulating bead of the lamp cap.
6. A lamp as claimed in Claim 1 or 2, characterized in that the cooling member is for the major part plate-shaped, whilst the circumference can be resiliently reduced and the cooling member has such dimensions that it bears on the sleeve of the lamp cap in the sleeve in a self-clamping manner the major surfaces of the cooling member being sub-stantially at right angles to the longitudinal axis of the lamp cap sleeve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8400631 | 1984-02-29 | ||
| NL8400631 | 1984-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1239436A true CA1239436A (en) | 1988-07-19 |
Family
ID=19843560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000475385A Expired CA1239436A (en) | 1984-02-29 | 1985-02-28 | High-pressure discharge lamp |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4644226A (en) |
| EP (1) | EP0155719B1 (en) |
| JP (1) | JPH0616413B2 (en) |
| CA (1) | CA1239436A (en) |
| DE (1) | DE3570552D1 (en) |
| HU (1) | HU204625B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5030890A (en) * | 1988-05-25 | 1991-07-09 | Johnson Samuel A | Two terminal incandescent lamp controller |
| USRE35220E (en) * | 1988-05-25 | 1996-04-30 | Beacon Light Products, Inc. | Two terminal controller |
| US5504394A (en) * | 1993-03-08 | 1996-04-02 | Beacon Light Products, Inc. | Lamp bulb having integrated lighting function control circuitry and method of manufacture |
| US5504395A (en) * | 1993-03-08 | 1996-04-02 | Beacon Light Products, Inc. | Lamp bulb having integrated RFI suppression and method of restricting RFI to selected level |
| US5861721A (en) * | 1996-11-25 | 1999-01-19 | Beacon Light Products, Inc. | Smooth switching module |
| US5861720A (en) * | 1996-11-25 | 1999-01-19 | Beacon Light Products, Inc. | Smooth switching power control circuit and method |
| US7224125B2 (en) * | 2002-10-04 | 2007-05-29 | International Rectifier Corporation | Dimmable fluorescent lamp package |
| US7753558B2 (en) * | 2002-10-04 | 2010-07-13 | International Rectifier Corporation | Compact fluorescent lamp package |
| US7258464B2 (en) | 2002-12-18 | 2007-08-21 | General Electric Company | Integral ballast lamp thermal management method and apparatus |
| WO2009048610A1 (en) | 2007-10-10 | 2009-04-16 | Cardiac Pacemakers, Inc. | Respiratory stimulation for treating periodic breathing |
| JP6272232B2 (en) * | 2011-11-28 | 2018-01-31 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | High pressure gas discharge lamp |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4932486A (en) * | 1972-06-12 | 1974-03-25 | ||
| US3925705A (en) * | 1974-05-15 | 1975-12-09 | Westinghouse Electric Corp | Low-cost power-reducing device for hid lamp |
| US4061939A (en) * | 1976-08-02 | 1977-12-06 | General Electric Company | Low noise sodium vapor lamp for sonic pulse operation |
| JPS5643571U (en) * | 1979-09-13 | 1981-04-20 | ||
| NL8006802A (en) * | 1980-12-16 | 1982-07-16 | Philips Nv | STARTER FOR IGNITION OF A GAS AND / OR VAPOR DISCHARGE TUBE, AND ELECTRICAL DEVICE AND LAMP EQUIPPED WITH SUCH A STARTER. |
| JPS57202056A (en) * | 1981-06-05 | 1982-12-10 | Toshiba Corp | Fluorescent lamp unit |
| US4570105A (en) * | 1983-09-20 | 1986-02-11 | Engel Herman J | Electrical adapter for use in connection with fluorescent lamps |
-
1985
- 1985-02-25 DE DE8585200253T patent/DE3570552D1/en not_active Expired
- 1985-02-25 EP EP85200253A patent/EP0155719B1/en not_active Expired
- 1985-02-26 HU HU85712A patent/HU204625B/en not_active IP Right Cessation
- 1985-02-26 JP JP60035412A patent/JPH0616413B2/en not_active Expired - Lifetime
- 1985-02-28 CA CA000475385A patent/CA1239436A/en not_active Expired
-
1986
- 1986-05-13 US US06/863,824 patent/US4644226A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3570552D1 (en) | 1989-06-29 |
| JPS60207243A (en) | 1985-10-18 |
| HUT37298A (en) | 1985-11-28 |
| US4644226A (en) | 1987-02-17 |
| EP0155719B1 (en) | 1989-05-24 |
| JPH0616413B2 (en) | 1994-03-02 |
| EP0155719A1 (en) | 1985-09-25 |
| HU204625B (en) | 1992-01-28 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |