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| Number | Title | Issue Date |
| 8098015 | Lamp operation device and image display device A lamp operation device includes a mode setting part that sets an operation mode for lamps, and a lamp operation part that controls switching between the lamps in accordance with the set operation mode. The lamp operation part includes a process corresponding to a m... | 01/17/2012 |
| 7397194 | Auxiliary quartz lamp lighting system for high intensity discharge lamp ballasts The invention comprises an auxiliary lamp controller and related circuits to operate an auxiliary lamp and circuit to light auxiliary lamps at 120 VAC and 50-60 Hz current connected to an electronic HID ballast operating at a frequency of 50-60 Hz to over 400 kHz an... | 07/08/2008 |
| 7282863 | Auxiliary quartz lamp lighting system for electronic high intensity discharge lamp ballasts A method and electronic circuit operate a quartz auxiliary lamp lighting lamp and circuit to light a quartz auxiliary lamp at 120 Vac and 50-60 Hz current connected to an electronic HID ballast operating at a frequency of 100 Hz to over 400 kHz and voltages of from ... | 10/16/2007 |
| 7276855 | Auxilary lighting circuit for high intensity discharge system The embodiment disclosed herein relates to a lighting system that includes an auxiliary lighting circuit for use with an electronic HID ballast. The lighting system comprises a power supply configured to provide power to a high intensity discharge (HID) lamp via an ... | 10/02/2007 |
| 7268679 | Rear lighting system applied to an automotive vehicle A rear lighting system for an automobile having the ability to serve several functions and to detect and compensate for burned out or damaged lighting elements. ... | 09/11/2007 |
| 7265650 | Power factor correction rectifier having independent inductive components A PFC circuit comprises a first converter and a second converter and a multi-port electromagnetic device. The first converter has a first inductive element and the second converter has a second inductive element. The multi-port electromagnetic device comprises a fir... | 09/04/2007 |
| 7164235 | Vehicular lamp A vehicular lamp, including: a plurality of semiconductor light emitting devices connected in parallel; a plurality of current limiting units provided corresponding to the plurality of semiconductor light emitting devices, wherein the plurality of current limiting u... | 01/16/2007 |
| 7109659 | High-intensity discharge lamp ballast and method for operating high-intensity discharge lamp A high-intensity discharge lamp ballast includes a lamp operation unit configured to supply power from a power source to a high-intensity discharge lamp, a lamp voltage detector configured to detect a voltage applied to the high-intensity discharge lamp, a lamp stat... | 09/19/2006 |
| 7102295 | Electronic device with illumination circuit and EL device utilizing the same An electronic device having an illumination circuit. The illumination circuit utilizes an AC current of an AC driving device to drive an illumination device such as an electroluminescent lamp and the remaining life of the AC driving device indicated by the brightnes... | 09/05/2006 |
| 7034466 | Standby lighting control for high intensity discharge lamp A High-Intensity Discharge lamp which includes a high intensity discharge light disposed within the light cavity and a standby lighting control system including a light sensor for detecting a light intensity within the light cavity and a standby lamp which is suppor... | 04/25/2006 |
| 7005805 | Back light circuit of LCD in an electric refrigerator In an electric freezing refrigerator, when a light emitting diode of back light unit deteriorate due to an external impact or an internal defect or a port terminal of a microcomputer applying power to the light emitting diode is damaged, the back lighting of electri... | 02/28/2006 |
| 6936969 | Secondary vehicle headlight system A secondary headlight system for detecting and compensating for failure of an automotive vehicle's low beam headlight, includes: (a) at least one photoresistor; (b) fiberoptics connected to the photoresistor; ... | 08/30/2005 |
| 6933678 | Emergency lighting function illumination appliance An emergency lighting function illumination appliance comprised of a fluorescent lamp tube, a controller, a mains power circuit capable of processing mains electric power for lighting, and a backup circuit that provides for a backup power source. With these devices ... | 08/23/2005 |
| 6781316 | Vehicle light apparatus A vehicle light apparatus 1 includes a discharge lamp 7 as a dipped (low)-beam light source and a high-beam light source or a light source of an auxiliary light (incandescent lamp) 3 as a substitutional light source of the discharge lamp. If the... | 08/24/2004 |
| 6756893 | Light emitting diodes surrounding a vehicle lamp A plurality of light emitting diodes are mounted on a base that encircles or surrounds a primary vehicle light source such as a headlight, a taillight, a turn signal light or the like. A control circuit senses when the primary light source fails to provide the requi... | 06/29/2004 |
| 6663248 | Driving circuit for LED lamps A driving circuit for LED lamps includes a DC power unit, a control unit connected to a bank of LEDs, and a backup power unit. The DC power unit outputs DC power to the control unit, the bank of LEDs, and the backup power unit. When DC power from the DC p... | 12/16/2003 |
| 6534930 | Discharge lamp lighting circuit with protection circuit A discharge lamp lighting circuit 1 has a DC power supply section 4 for receiving power supply from a DC power supply 2, a DC-AC conversion section 5 for converting an output voltage of the DC power supply section 4 into an AC voltage and then applying th... | 03/18/2003 |
| 6525479 | Method and ballast for operating a lamp fitted with a fluorescent tube The invention relates to a method and ballast for operating a lamp (3) fitted with a fluorescent tube (2), whereby the operating data of certain recognizable lamp types (T1, T2, Tn-1, Tn), at least the lamp volt... | 02/25/2003 |
| 6498436 | Method for operating a lamp, particularly for medical applications, and a lamp having a discharge lamp In order to make continuous lamp operation in a failsafe lamp, particularly a lamp for medical applications, having a discharge lamp possible even When changing over between a power supply system (low voltage supply system of, for example, 24 V) and an ad... | 12/24/2002 |
| 6483260 | Apparatus for operating respective single lamps among multiple lamps coupled to the same ballast An apparatus and method are provided for operating one of a plurality of lamps employed within a luminaire via a single ballast, thereby extending the operational life of the luminaire. The operating lamp disables the lamps downstream from itself by preve... | 11/19/2002 |
| 6476559 | Ceremonial luminary and associated process A ceremonial illuminary including a voltage supply mechanism, a switching mechanism that is electrically connected to the voltage supply mechanism, a first lamp electrically connected to the switching mechanism, a second lamp electrically connected to the... | 11/05/2002 |
| 6417624 | Lighting system for vehicle A lighting system provides an auxiliary lighting circuit for turning on an auxiliary light source in place of the discharge lamp if the abnormality in the lighting circuit is detected.... | 07/09/2002 |
| 6281631 | Vehicle light system circuit which automatically compensates for a light source failure A vehicle light system circuit includes a PROFET to automatically detect the presence of a faulty light source and switch to an unaffected light source. The system also adjusts the brightness of the unaffected light source by adjusting a PWM signal applie... | 08/28/2001 |
| 6278382 | Recognition/anti-collision light for aircraft A recognition light includes a reflector having an axis and first and second annular semi-parabolic reflective surfaces which have respective focal points axially spaced apart from one another, and first and second annular lamps respectively disposed at t... | 08/21/2001 |
| 5955945 | Fail safe system for providing warning signals upon the failure of motorcycle brake or tail lights A system for use in monitoring the operation of motorcycle brake and tail lights is disclosed which, upon determination that a brake or tail light is not operating properly to provide a warning light signal, automatically provides an alternate warning lig... | 09/21/1999 |
| 5680098 | Circuit for compensating for failure of a light source in an automotive vehicle A circuit for compensating for failure of a light source includes a first light source having a first function and a first intensity associated therewith and a second light source having a second function and a second intensity associated therewith. A con... | 10/21/1997 |
| 5646484 | High reliability incandescent portable illumination system A high reliability portable incandescent illumination system for use in applications which require a reliable, high output light source such as heliport markers, runway lights, warning lights, road hazard and obstruction lights. The required elements of t... | 07/08/1997 |
| 5550433 | Driver circuit for discharge lamps Driver circuit for discharge lamps. The driver circuit contains an inverter driving a lamp circuit with a discharge lamp and the current in the lamp circuit is measured as a voltage UILC over a resistor, with a control circuit comprising a stri... | 08/27/1996 |
| 5430354 | HID lamp and auxiliary lamp ballast using a single multiple function switch A ballast for lighting an auxiliary source of illumination whenever a primary source of illumination fails to ignite. The auxiliary source of illumination is effectively turned OFF by placing a short circuit thereacross whenever the primary source of illu... | 07/04/1995 |
| 5300863 | Auxiliary lighting circuit for a gaseous discharge lamp A non-arcing electrical switch is disclosed wherein a solid-state switching element is operated in response to current flow within an external circuit. The switch is particularly suitable for use within an auxiliary lighting circuit of a gaseous discharge... | 04/05/1994 |
| 5276385 | High-pressure discharge lamp and lighting method The invention provides a high-pressure discharge lamp incorporating an outer envelope storing a pair of electric terminals a plurality of arc tubes which are respectively stored in this outer envelope and electrically connected in parallel, and a pluralit... | 01/04/1994 |
| 5256946 | Gaseous discharge lamp system with auxiliary lamp A lighting system having a primary light source and an emergency lamp. The emergency lamp is turned on and remains on upon failure or removal from the system of the primary light source. The system also includes a control device for sensing when the volta... | 10/26/1993 |
| 5216328 | Vehicle lighting system A lighting circuit for a vehicle illuminates a back-up lighting element when a primary lighting element fails. Both lighting elements may be installed in a single housing, such as a headlight assembly. A dashboard switch places the primary lighting elemen... | 06/01/1993 |
| 5175469 | Combination including an emergency lighting arrangement An arrangement for use with gaseous discharge lamp circuits having a power factor capacitor in which the capacitor can be disconnected from the circuit when the lamp is not drawing current and in which an emergency lamp can be connected across a voltage s... | 12/29/1992 |
| 5132594 | Longer-life incandescent lamp An incandescent lamp has a first and a second filament, one or the other of which is arranged to connect with the socket voltage in an ordinary lamp socket by way of a bistable thermally actuated switch built into the lamp. Upon initial provision of the s... | 07/21/1992 |
| 5115165 | Safety lighting means for use with a high intensity discharge lamp This safety lighting arrangement is especially suited for use with variously rated HID light sources having current ratings ranging from relatively low to relatively high values. The safety light arrangement includes a current transformer having a magneti... | 05/19/1992 |
| 5023515 | Redundant lamp control circuit A circuit for energizing either a first or second lamp and for energizing a motor to position the energized lamp is comprised of first and second switches for supplying current to one of the lamps. Current sensors are provided to monitor the flow of curre... | 06/11/1991 |
| 5003224 | Method and a device for replacing incandescent filaments, and a lamp with several filaments An automatic replacement circuit is provided for the replacement of burnt-out filaments as well as a method for implementing the replacement of incandescent filaments. The replacement circuit includes a pulse generator which operates independently of the ... | 03/26/1991 |
| 4988925 | Omnidirectional metal halide arc discharge lamp An arc discharge lamp which can be operated in any orientation without significant variation in performance includes an even number of electrodes at least equal to four, a discharge vessel including a spherical central portion and electrode mounting porti... | 01/29/1991 |
| 4961028 | Lighting equipment Equipment for lighting a work area has a plurality of light sources, at least one of which is usually lighted; the others are spare light sources and are usually turned off. The equipment has means such as an optical fiber to conduct light from the light ... | 10/02/1990 |
