摘要:
A dielectric barrier discharge lamp comprises multiple tubular discharge vessels of a substantially equivalent size and having a principal axis. Each discharge vessel encloses a discharge volume filled with a discharge gas. The discharge vessels are arranged substantially parallel to their principal axis and adjacent to each other. The lamp also comprises a first set of interconnected electrodes and a second set of interconnected electrodes. The electrodes are isolated from the discharge volume by at least one dielectric layer. At least one of the dielectric layers is constituted by the wall of the discharge vessel, and the electrodes of at least one electrode set are located between the discharge vessels. In one embodiment, the discharge vessels are adjacent to each other in a lattice, and the first and second electrode sets are located between the discharge vessels in interstitial voids of the lattice. In another embodiment, the discharge vessels are arranged adjacent to each other along generatrices of a prism.
摘要:
A dielectric barrier discharge lamp comprises multiple tubular discharge vessels of a substantially equivalent size and having a principal axis. Each discharge vessel encloses a discharge volume filled with a discharge gas. The discharge vessels are arranged substantially parallel to their principal axis and adjacent to each other. The lamp also comprises a first set of interconnected electrodes and a second set of interconnected electrodes. The electrodes are isolated from the discharge volume by at least one dielectric layer. At least one of the dielectric layers is constituted by the wall of the discharge vessel, and the electrodes of at least one electrode set are located between the discharge vessels. In one embodiment, the discharge vessels are adjacent to each other in a lattice, and the first and second electrode sets are located between the discharge vessels in interstitial voids of the lattice. In another embodiment, the discharge vessels are arranged adjacent to each other along generatrices of a prism.
摘要:
A dielectric barrier discharge (DBD) lamp is disclosed. The DBD lamp comprises a discharge vessel, which encloses a discharge volume filled with discharge gas. The discharge vessel further comprises a phosphor layer within the discharge volume. The discharge vessel comprises an outer tubular portion having an internal surface, and an inner tubular portion having an outward surface. The outer tubular portion surrounds the inner tubular portion. In this manner, a substantially annular discharge volume is enclosed between the outer tubular portion and the inner tubular portion. The inner tubular portion comprises a multitude of protrusions around its circumference. The protrusions extend into the substantially annular discharge volume. A first set of interconnected electrodes and a second set of interconnected electrodes are also provided. The electrodes are isolated from the discharge volume by at least one dielectric layer, and at least one of the dielectric layers is constituted by the wall of the inner tubular portion.
摘要:
A lighting system and method for controlling illumination of the same upon detection of a user in at least one of a first detection area and a second detection area. The lighting system can include a lighting fixture having one or more lighting sources and at least two sensors associated with separate detection areas. Each sensor can send a signal to a controller associated with the lighting fixture, and the controller can be configured to vary the illumination of one or more of the lighting sources depending on the each sensor's detection area. The present subject matter facilitates energy savings since areas away from an occupied area are not illuminated. Communication between neighboring lighting fixtures is not required since each lighting fixture can detect the presence of a user in an area proximate an adjacent lighting fixture in order to trigger illumination of the lighting fixture.
摘要:
A discharge lamp such as a shrouded metal halide lamp is designed to reduce the potential for arcing under hot restart or restrike voltages. A stepped conformation of the pinch seal region limits arcing within the shroud while different dimensions of stems in the base increase the distance between outer lead wires in the base to prevent arcing externally of the shroud.
摘要:
A circuit or combined ballast for driving a fluorescent lamp and at least one light emitting diode (LED) includes an integrated driver circuit having an alternating current (AC) circuit that includes at least one ballast coil for driving the fluorescent lamp and a direct current circuit for driving the LED having a secondary winding inductively coupled with the fluorescent lamp ballast coil for driving the LED. A method of driving a lamp assembly includes at least one fluorescent lamp and at least one light emitting diode (LED) and a combined driver circuit for supplying both the fluorescent lamp and the LED. The combined driver circuit supplies high voltage AC supply to a first portion of the driver circuit to the fluorescent lamp, supplies low voltage DC supply in a second portion of the driver circuit to the LED, and provides a secondary winding in the second portion of the driver circuit that is inductively coupled with a ballast coil in the first portion of the driver circuit that drives the fluorescent lamp.
摘要:
Different arrangements for improving the coupling-in efficiency between an LED assembly and a light guide are disclosed. In a first arrangement, a substantially planar end of a light guide is seated on a perimeter wall of a support that encloses a LED assembly, and a reflecting surface enhances coupling efficiency of a light guide. Alternative arrangements use a separate coupler disposed between the LED assembly and the light guide, which coupler has a paraboloid or aspheroid conformation to develop substantially collimated light that is directed into the light guide. The cavity around the LED assembly and within the coupler, may be air or a material having an index of refraction that closely matches the index of refraction of the light guide material.
摘要:
Different arrangements for improving the coupling-in efficiency between an LED assembly and a light guide are disclosed. In a first arrangement, a substantially planar end of a light guide is seated on a perimeter wall of a support that encloses a LED assembly, and a reflecting surface enhances coupling efficiency of a light guide. Alternative arrangements use a separate coupler disposed between the LED assembly and the light guide, which coupler has a paraboloid or aspheroid conformation to develop substantially collimated light that is directed into the light guide. The cavity around the LED assembly and within the coupler, may be air or a material having an index of refraction that closely matches the index of refraction of the light guide material.
摘要:
A circuit or combined ballast for driving a fluorescent lamp and at least one light emitting diode (LED) includes an integrated driver circuit having an alternating current (AC) circuit that includes at least one ballast coil for driving the fluorescent lamp and a direct current circuit for driving the LED having a secondary winding inductively coupled with the fluorescent lamp ballast coil for driving the LED. A method of driving a lamp assembly includes at least one fluorescent lamp and at least one light emitting diode (LED) and a combined driver circuit for supplying both the fluorescent lamp and the LED. The combined driver circuit supplies high voltage AC supply to a first portion of the driver circuit to the fluorescent lamp, supplies low voltage DC supply in a second portion of the driver circuit to the LED, and provides a secondary winding in the second portion of the driver circuit that is inductively coupled with a ballast coil in the first portion of the driver circuit that drives the fluorescent lamp.
摘要:
A lighting system includes a plurality of fixtures, wherein each fixture includes a plurality of fluorescent lamps. A dimming ballast is operatively coupled to each fixture, each dimming ballast receives power from an outside source that is delivered to the fluorescent lamps within each corresponding fixture. A control module communicates with each dimming ballast, the control module receives a lighting level from an outside source, determines the most power efficient lighting solution and outputs a control signal to each dimming ballast related to the light output level of each lamp within each fixture.