EP1414058A2 - Electrodeless lamp system and bulb thereof - Google Patents
Electrodeless lamp system and bulb thereof Download PDFInfo
- Publication number
- EP1414058A2 EP1414058A2 EP20030000587 EP03000587A EP1414058A2 EP 1414058 A2 EP1414058 A2 EP 1414058A2 EP 20030000587 EP20030000587 EP 20030000587 EP 03000587 A EP03000587 A EP 03000587A EP 1414058 A2 EP1414058 A2 EP 1414058A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bulb
- conductors
- microwave
- resonator
- unit
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
Definitions
- the present invention relates to an electrodeless lamp system, and particularly, to a bulb used in an electrodeless lamp system.
- An electrodeless lamp system is a device for lighting by forming an electric field using microwave in a bulb unit in which a luminous material which illuminates by forming plasma due to the electric field.
- the electrodeless lamp system can be re-lighted after a certain time (tens of seconds - a few minutes) passed, since a mean free path of an electron having energy for forming plasma is not ensured due to high pressure of neutral gas, that is, the buffer gas filled together with the luminous material in the bulb unit.
- an object of the present invention is to provide an electrodeless lamp system and a bulb thereof by which re-lighting can be made easily and a size of a bulb unit can be reduced greatly.
- a bulb of an electrodeless lamp system comprising: a bulb unit having an envelope space in which luminous material excited by an electric field to form plasma and to generate light is filled; and two or more conductors installed in the envelope space and disposed to face end portions of each other.
- an electrodeless lamp system comprising: a microwave generator for generating microwave; a resonator connected to the microwave generator to resonate the microwave generated in the microwave generator; a bulb unit having an envelope space in which luminous material which is excited by an electric field to form plasma is filled in order to generate light, installed in the resonator; and two or more conductors installed in the envelope space and disposed to face end portions of each other.
- an electrodeless lamp system comprises: a microwave generator 20 for generating microwave; a resonator 40 connected to the microwave generator 20 to resonate the microwave generated in the microwave generator 20; a bulb unit 10 having an envelope space, in which luminous material excited by electric field formed in the resonator 40 to form plasma and to generate light is filled, installed in the resonator 40; and two conductors 11 installed in the envelope space 12 so that end portions face each other.
- the microwave generator 20 is a device for generating microwave forming an electric field, by which the luminous material is able to form the plasma, and a magnetron is used as the microwave generator generally.
- the microwave generator 20 can be installed with the resonator 40 or additionally, and the microwave generator 20 can be connected to the resonator 40 by a waveguide 30 in order to transmit microwave generated from the microwave to the resonator 40.
- the luminous material may be metal, halogen compound, sulfur or selenium (Se) which is able to generate the light such as visible ray (wavelength of the generated light can be varied according to the luminous material).
- buffer gas comprising Ar, Xe, Kr, etc. for initial lighting, and discharge catalyst material such as mercury for helping the initial discharging to make the lighting performed easily or controlling characteristics of the generated light are filled with the luminous material.
- a sealed envelope space 12 is formed in the bulb unit 10, and the bulb unit 10 is made with material having high light transmittance and little dielectric loss such as quartz or light transmittable ceramic.
- a thickness of the bulb unit 10 is larger than twice of a width of the envelope space 12 in order to improve easiness in fabrication and the reliability of the bulb unit 12.
- the bulb unit 10 is installed in the resonator 40, and may be installed by a supporting member 15 as shown in Figure 1.
- Two (or more) conductors 11 may be installed, and the ends of the conductors are disposed to face each other so that strong electric field is formed between the ends of the conductors as shown in Figure 2.
- the conductors 11 are made of material such as tungsten having high heat resistance so that physical shape of the conductors can be maintained even in high temperature of hundreds °C in the envelope space 12.
- the conductors 11 may be coated with heat-resisting member 13 on outer circumferential surfaces thereof so as to prevent the conductors from being deteriorated by directly reacting with the luminous material in the envelope space 12.
- the heat-resisting member 13 may be same material as the bulb unit 10 such as the quartz or the light transmittable ceramic, when considering the junction with the bulb unit 10 and the coefficient of thermal expansion, and the heat-resisting member 13 may be formed with marginal space as considering the thermal expansion of the conductors 11.
- the conductors 11 are able to concentrate the electric field more effectively according to the shapes of the bulb unit 10 or the conductors 11.
- a spire 11a may be formed on the end of the conductor 11 as shown in Figures 2 and 3.
- the heat-resisting member 13 may be coated on the conductor 11 as shown in Figure 6.
- the shape of the bulb unit 10 may be changed in order to improve the concentration of electric field in the envelope space 12, and the shape of the bulb unit 10 can be formed as '8' shape as shown in Figures 7 and 8, not as a general spherical or circular shape.
- the ends of the conductors 11 are installed on both sides taking a curved part of the envelope space 12 therebetween, and thereby, the part where the electric field is concentrated is narrowed to generate plasma concentration phenomenon, and the re-lighting is accelerated and the size of light source can be controlled.
- the bulb unit 10 having '8' shape is able to control the gap between the conductors 11, and control the shape of the envelope space 12.
- the distance between the ends of the conductors 11 is in proportion to the size of the envelope space 12, and therefore, the re-lighting characteristic according to the size change of bulb unit 10 can be improved.
- the re-lighting characteristic can be improved by reducing the distance between the ends.
- the distance between the ends of the conductors 11 is in proportion to the size of the bulb unit 10 or the size of the envelope space 12, and therefore, appropriate electric field concentration phenomenon can be generated for initial lighting or for the re-lighting.
- the conductors 11 can be installed in the bulb unit 10 without using the additional heat-resisting member 13 for protecting the conductors 11.
- the electrodeless lamp system according to the present invention may include an microwave feeder unit 50 which is connected to the microwave generator 20 and extended into the resonator 60 for transmitting the microwave generated in the microwave generator 20 into the resonator 60.
- an microwave feeder unit 50 which is connected to the microwave generator 20 and extended into the resonator 60 for transmitting the microwave generated in the microwave generator 20 into the resonator 60.
- one of the conductors 11 is connected to the microwave feeder unit 50, and the other may be connected to the resonator 50.
- Unexplained reference numeral 71 represents a reflecting mirror for making the light generated from the bulb unit 10 face toward a certain direction
- reference numeral 72 represents a mesh member which transmits the light and blocks the microwave.
- the parts 14 connected to the conductors 11 represent status that the conductors 11 are connected to the resonator 60 and to the microwave feeder unit 50 respectively, in case that the bulb unit 10 is used in the electrodeless lamp system shown in Figure 4.
- the microwave generator 20 generates the microwave having an output set by electric power supply, and the generated microwave is transmitted into the resonator 40 by the waveguide 30.
- the luminous material filled in the envelope space 12 of the bulb unit 10 forms plasma by the electric field formed in the resonator 40, and thereby, the light is generated.
- the buffer gas makes the initial lighting or the re-lighting of the bulb unit 10 easy, and at the same time, the strong electric field is concentrated between the conductors 11 to make the initial lighting or the re-lighting easy.
- the strong electric field is formed between the resonator 60 and the microwave feeder unit 50.
- the conductors 11 connected to the microwave feeder unit 50 and to the resonator 60 form the strong electric field together, and thereby, the initial lighting or the re-lighting can be made easily.
- the conductors facing each other are installed in the bulb unit to make the electric field concentrate on the ends of the conductors, and accordingly, the strong electric field is formed and the discharge speed of the electrons is accelerated. Thereby, the initial lighting time or the re-lighting time of the electrodeless lamp system can be reduced.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
- The present invention relates to an electrodeless lamp system, and particularly, to a bulb used in an electrodeless lamp system.
- An electrodeless lamp system is a device for lighting by forming an electric field using microwave in a bulb unit in which a luminous material which illuminates by forming plasma due to the electric field.
- Generally, when the electrodeless lamp is turned off, the electrodeless lamp system can be re-lighted after a certain time (tens of seconds - a few minutes) passed, since a mean free path of an electron having energy for forming plasma is not ensured due to high pressure of neutral gas, that is, the buffer gas filled together with the luminous material in the bulb unit.
- Especially, in case that Xenon Xe is used as the buffer gas, light efficiency is improved about 5% more than that of using Argon Ar gas. However, collision cross section of the Xe is large, and therefore, it is difficult to discharge in high pressure status.
- Therefore, in the conventional art, in order to reduce the re-lighting time of the electrodeless lamp system, strong wind is blown directly to the bulb unit to cool down the bulb and to decrease the pressure in the bulb unit, however, problems such as increased cost due to additional devices, reliability of the additional devices, utilization of a space around the bulb unit, and light screening by the additional devices are generated.
- Also, in case of a light source of small size, that is, in case of the bulb unit for point light source (an arc gap is less than 2mm), there should be an auxiliary device for initial light emitting.
- Therefore, an object of the present invention is to provide an electrodeless lamp system and a bulb thereof by which re-lighting can be made easily and a size of a bulb unit can be reduced greatly.
- To achieve the object of the present invention, as embodied and broadly described herein, there is provided a bulb of an electrodeless lamp system comprising: a bulb unit having an envelope space in which luminous material excited by an electric field to form plasma and to generate light is filled; and two or more conductors installed in the envelope space and disposed to face end portions of each other.
- Also, to achieve the object invention, there is provided an electrodeless lamp system comprising: a microwave generator for generating microwave; a resonator connected to the microwave generator to resonate the microwave generated in the microwave generator; a bulb unit having an envelope space in which luminous material which is excited by an electric field to form plasma is filled in order to generate light, installed in the resonator; and two or more conductors installed in the envelope space and disposed to face end portions of each other.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
- In the drawings:
- Figure 1 is a partial cross-sectional view showing a part of an electrodeless lamp system according to the present invention;
- Figure 2 is a cross-sectional view showing the first embodiment of the electrodeless lamp system shown in Figure 1;
- Figure 3 is a cross-sectional view showing the conductor coated with heat-resisting member in the bulb unit shown in Figure 2;
- Figure 4 is a cross-sectional view showing a resonator of coaxial type in the bulb unit used in the electrodeless lamp system according to the present invention;
- Figure 5 is a cross-sectional view showing the second embodiment of the bulb unit in the electrodeless lamp system according to the present invention;
- Figure 6 is a cross-sectional view showing the bulb unit shown in Figure 5 coated with a heat-resisting member;
- Figure 7 is a cross-sectional view showing the third embodiment of the bulb unit in the electrodeless lamp system according to the present invention;
- Figure 8 is a cross-sectional view showing the bulb unit in Figure 7 coated with heat-resisting member; and
- Figures 9 and 10 are cross-sectional views showing fourth and fifth embodiments of the bulb unit in the electrodeless lamp system according to the present invention.
- Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
- As shown in Figure 1, an electrodeless lamp system according to the present invention comprises: a
microwave generator 20 for generating microwave; aresonator 40 connected to themicrowave generator 20 to resonate the microwave generated in themicrowave generator 20; abulb unit 10 having an envelope space, in which luminous material excited by electric field formed in theresonator 40 to form plasma and to generate light is filled, installed in theresonator 40; and twoconductors 11 installed in theenvelope space 12 so that end portions face each other. - The
microwave generator 20 is a device for generating microwave forming an electric field, by which the luminous material is able to form the plasma, and a magnetron is used as the microwave generator generally. - In addition, the
microwave generator 20 can be installed with theresonator 40 or additionally, and themicrowave generator 20 can be connected to theresonator 40 by awaveguide 30 in order to transmit microwave generated from the microwave to theresonator 40. - The luminous material may be metal, halogen compound, sulfur or selenium (Se) which is able to generate the light such as visible ray (wavelength of the generated light can be varied according to the luminous material). In addition, buffer gas comprising Ar, Xe, Kr, etc. for initial lighting, and discharge catalyst material such as mercury for helping the initial discharging to make the lighting performed easily or controlling characteristics of the generated light are filled with the luminous material.
- A sealed
envelope space 12 is formed in thebulb unit 10, and thebulb unit 10 is made with material having high light transmittance and little dielectric loss such as quartz or light transmittable ceramic. In addition, when the size of the sealedenvelope space 12 is small, as in the bulb unit for point light source, it is desirable that a thickness of thebulb unit 10 is larger than twice of a width of theenvelope space 12 in order to improve easiness in fabrication and the reliability of thebulb unit 12. - The
bulb unit 10 is installed in theresonator 40, and may be installed by a supportingmember 15 as shown in Figure 1. - Two (or more)
conductors 11 may be installed, and the ends of the conductors are disposed to face each other so that strong electric field is formed between the ends of the conductors as shown in Figure 2. Theconductors 11 are made of material such as tungsten having high heat resistance so that physical shape of the conductors can be maintained even in high temperature of hundreds °C in theenvelope space 12. In addition, as shown in Figure 3, theconductors 11 may be coated with heat-resistingmember 13 on outer circumferential surfaces thereof so as to prevent the conductors from being deteriorated by directly reacting with the luminous material in theenvelope space 12. The heat-resistingmember 13 may be same material as thebulb unit 10 such as the quartz or the light transmittable ceramic, when considering the junction with thebulb unit 10 and the coefficient of thermal expansion, and the heat-resistingmember 13 may be formed with marginal space as considering the thermal expansion of theconductors 11. - On the other hand, the
conductors 11 are able to concentrate the electric field more effectively according to the shapes of thebulb unit 10 or theconductors 11. In order to maximize the concentration of the electric field as shown in Figure 5, aspire 11a may be formed on the end of theconductor 11 as shown in Figures 2 and 3. Of course, the heat-resistingmember 13 may be coated on theconductor 11 as shown in Figure 6. - Also, the shape of the
bulb unit 10 may be changed in order to improve the concentration of electric field in theenvelope space 12, and the shape of thebulb unit 10 can be formed as '8' shape as shown in Figures 7 and 8, not as a general spherical or circular shape. In addition, the ends of theconductors 11 are installed on both sides taking a curved part of theenvelope space 12 therebetween, and thereby, the part where the electric field is concentrated is narrowed to generate plasma concentration phenomenon, and the re-lighting is accelerated and the size of light source can be controlled. - Also, the
bulb unit 10 having '8' shape is able to control the gap between theconductors 11, and control the shape of theenvelope space 12. - As shown in Figures 9 and 10, the distance between the ends of the
conductors 11 is in proportion to the size of theenvelope space 12, and therefore, the re-lighting characteristic according to the size change ofbulb unit 10 can be improved. Especially, in case of the light source of small size, that is, the bulb unit for point light source (an arc gap is less than 2mm), the re-lighting characteristic can be improved by reducing the distance between the ends. - That is, as shown in Figures 9 and 10, the distance between the ends of the
conductors 11 is in proportion to the size of thebulb unit 10 or the size of theenvelope space 12, and therefore, appropriate electric field concentration phenomenon can be generated for initial lighting or for the re-lighting. Especially, as shown in Figure 10, theconductors 11 can be installed in thebulb unit 10 without using the additional heat-resistingmember 13 for protecting theconductors 11. - On the other hand, as shown in Figure 4, the electrodeless lamp system according to the present invention may include an
microwave feeder unit 50 which is connected to themicrowave generator 20 and extended into theresonator 60 for transmitting the microwave generated in themicrowave generator 20 into theresonator 60. At that time, one of theconductors 11 is connected to themicrowave feeder unit 50, and the other may be connected to theresonator 50. -
Unexplained reference numeral 71 represents a reflecting mirror for making the light generated from thebulb unit 10 face toward a certain direction, andreference numeral 72 represents a mesh member which transmits the light and blocks the microwave. In addition, as shown in Figures 5 through 10, theparts 14 connected to theconductors 11 represent status that theconductors 11 are connected to theresonator 60 and to themicrowave feeder unit 50 respectively, in case that thebulb unit 10 is used in the electrodeless lamp system shown in Figure 4. - Operations of the electrodeless lamp system according to the present invention having above structure will be described in detail as follows.
- The
microwave generator 20 generates the microwave having an output set by electric power supply, and the generated microwave is transmitted into theresonator 40 by thewaveguide 30. In addition, the luminous material filled in theenvelope space 12 of thebulb unit 10 forms plasma by the electric field formed in theresonator 40, and thereby, the light is generated. - At that time, the buffer gas makes the initial lighting or the re-lighting of the
bulb unit 10 easy, and at the same time, the strong electric field is concentrated between theconductors 11 to make the initial lighting or the re-lighting easy. - Also, in the electrodeless lamp system having the structure shown in Figure 4, the strong electric field is formed between the
resonator 60 and themicrowave feeder unit 50. Moreover, theconductors 11 connected to themicrowave feeder unit 50 and to theresonator 60 form the strong electric field together, and thereby, the initial lighting or the re-lighting can be made easily. - According to the electrodeless lamp system of the present invention, the conductors facing each other are installed in the bulb unit to make the electric field concentrate on the ends of the conductors, and accordingly, the strong electric field is formed and the discharge speed of the electrons is accelerated. Thereby, the initial lighting time or the re-lighting time of the electrodeless lamp system can be reduced.
- As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (20)
- A bulb for an electrodeless lamp system comprising:a bulb unit having an envelope space in which luminous material excited by electric field to form plasma and generate light is filled; andtwo or more conductors installed in the envelope space so that ends of the conductors face each other.
- The bulb of claim 1, wherein the bulb unit is quartz or light transmittable ceramic material.
- The bulb of claim 1, wherein the number of the conductors are two.
- The bulb of claim 1, wherein the conductors are made of tungsten.
- The bulb of claim 1, wherein the conductors are coated with heat-resisting member.
- The bulb of claim 5, wherein the heat resisting member is coated by same material as that of the bulb unit.
- The bulb of claim 1, wherein a distance between the ends of the conductors is in proportion to a size of the envelope space.
- The bulb of claim 1, wherein a thickness of the bulb unit is larger than twice of a width of the envelope space.
- The bulb of claim 1, wherein the bulb unit is a spherical shape.
- The bulb of claim 1, wherein the bulb unit and the envelope space are formed as '8' shape.
- The bulb of claim 1, wherein the electrodeless lamp system uses a resonator of coaxial type, and one of the conductors are connected to the resonator, and the other is connected an inner electrode which fixedly install the bulb unit in the resonator.
- An electrodeless lamp system comprising:a microwave generator for generating microwave;a resonator connected to the microwave generator for resonating the microwave generated from the microwave generator;a bulb unit installed in the resonator and having an envelope space in which luminous material forming plasma by electric field formed in the resonator to generate light is filled; andtwo or more conductors installed in the envelope space so that ends of the conductors face each other.
- The system of claim 12, further comprising a waveguide connected to the microwave generator for transmitting the microwave from the microwave generator to the microwave.
- The system of claim 12, wherein the number of the conductors are two.
- The system of claim 12, the conductors are coated with heat resisting material.
- The system of claim 15, wherein the heat resisting member is coated with same material as that of the bulb unit.
- The system of claim 15, wherein the heat resisting member is quartz or light transmittable ceramic material.
- The system of claim 12, wherein a distance between the ends of the conductors is in proportion to a size of the envelope space.
- The system of claim 12, wherein a thickness of the bulb unit is larger than twice of a width of the envelope space.
- The system of claim 12, comprising an microwave feeder unit connected to the microwave unit and extended into the resonator for transmitting the microwave generated in the microwave generator into the resonator, wherein one of the conductors is connected to the resonator and the other is connected to the microwave feeder unit.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2002064349 | 2002-10-24 | ||
KR20020064349 | 2002-10-24 |
Publications (2)
Publication Number | Publication Date |
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EP1414058A2 true EP1414058A2 (en) | 2004-04-28 |
EP1414058A3 EP1414058A3 (en) | 2006-02-15 |
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ID=32064967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03000587A Withdrawn EP1414058A3 (en) | 2002-10-24 | 2003-01-14 | Electrodeless lamp system and bulb thereof |
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EP (1) | EP1414058A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014161670A1 (en) * | 2013-04-05 | 2014-10-09 | Cooper Crouse-Hinds Gmbh | Lamp |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3918839A1 (en) * | 1988-06-20 | 1989-12-21 | Gen Electric | DISCHARGE LAMP HIGH INTENSITY |
EP0458544A2 (en) * | 1990-05-23 | 1991-11-27 | General Electric Company | A starting aid for an electrodeless high intensity discharge lamp |
EP0602746A1 (en) * | 1992-12-15 | 1994-06-22 | Matsushita Electric Works, Ltd. | Electrodeless discharge lamp |
WO1997027617A1 (en) * | 1996-01-26 | 1997-07-31 | Fusion Lighting, Inc. | Microwave container screens for electrodeless lamps |
US6072268A (en) * | 1992-04-13 | 2000-06-06 | Fusion Lighting, Inc. | Lamp apparatus and method for re-using waste light |
-
2003
- 2003-01-14 EP EP03000587A patent/EP1414058A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3918839A1 (en) * | 1988-06-20 | 1989-12-21 | Gen Electric | DISCHARGE LAMP HIGH INTENSITY |
EP0458544A2 (en) * | 1990-05-23 | 1991-11-27 | General Electric Company | A starting aid for an electrodeless high intensity discharge lamp |
US6072268A (en) * | 1992-04-13 | 2000-06-06 | Fusion Lighting, Inc. | Lamp apparatus and method for re-using waste light |
EP0602746A1 (en) * | 1992-12-15 | 1994-06-22 | Matsushita Electric Works, Ltd. | Electrodeless discharge lamp |
WO1997027617A1 (en) * | 1996-01-26 | 1997-07-31 | Fusion Lighting, Inc. | Microwave container screens for electrodeless lamps |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014161670A1 (en) * | 2013-04-05 | 2014-10-09 | Cooper Crouse-Hinds Gmbh | Lamp |
US9812314B2 (en) | 2013-04-05 | 2017-11-07 | Eaton Protection Systems Ip Gmbh & Co. Kg | Lamp |
Also Published As
Publication number | Publication date |
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EP1414058A3 (en) | 2006-02-15 |
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