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7638948 |
Apparatus and method for detecting failure in an emergency lighting lamphead
An apparatus and method adapted to detect a failure in at least one lamphead of an emergency lighting system includes a signal generator and a failure sensor. The lamphead receives power from a...
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7626343 |
Driving device for discharge lamps and voltage detection circuit used therein
A voltage detection circuit includes a voltage obtaining circuit for transforming an AC signal into a voltage signal, an over-voltage detection circuit connected to the voltage obtaining circuit,...
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7602305 |
Feedback circuit for a display sign and method
A feedback circuit for a display sign has a number of lights. A resistor is coupled in series with the lights. A voltage measuring circuit is coupled to the resistor.
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7501769 |
Light fixture with a diagnostic ballast
The invention relates to a light fixture assembly having a ballast substantially maintaining a consistent current and further includes an indicator for indicating a problem with the light fixture...
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7492103 |
Energy saving lamp with sensor
Disclosed is a multi-functional energy-saving fluorescent lamp in which an illumination sensor for distinguishing day and night, a timer for time control, and an infrared sensor for sensing a human...
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7489089 |
Color control system for color changing lights
A system and method for color changing lighting comprising a pre-programmed controller along with driver circuit, a single or combination of LEDs and an OFF/ON switch which is used for making...
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7425798 |
Intelligent light degradation sensing LED traffic signal
The inventive signal incorporates an intelligent diagnosis module inside a light emitting diode (LED) signal, such as an LED traffic signal. The inventive signal can self-extinguish or send a...
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7414540 |
Computer power indicator circuit
In one preferred embodiment, a power indicator circuit for a computer comprises a light-emitting diode (LED) indicating power management states of a computer; a first resister connected between one...
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7394203 |
Method and system for open lamp protection
A detector circuit monitors the phase relationship between the lamp voltage and the excitation voltage, and if one or more conditions are met, triggers the open lamp protection process in a...
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7391164 |
Visual notification methods for candy-bar type cellphones
A wireless handheld communications device with a liquid crystal display, especially, a field sequential liquid crystal display, includes a visual notification for a powered up, inactive state. The...
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7382454 |
System and method for optically assessing lamp condition
A greater efficiency and cost-effectiveness is achieved by optically assessing the condition of a gas discharge lamp. Herein, a system and method of optically assessing lamp condition includes...
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7358685 |
DC-DC converter having protective function of over-voltage and over-current and led driving circuit using the same
The invention relates to a DC-DC converter having over-current/over-voltage protection function and an LED driving circuit using the same. The DC-DC converter adjusts a width of a switching pulse...
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7345423 |
Assembly of a fluorescent lamp and an extension means
An energy-saving assembly of an elongate low-pressure mercury vapor discharge lamp ( 1 ) and at least one elongate extension ( 2 ). The low-pressure mercury vapor discharge lamp includes a...
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7329995 |
Serial lamp set having security warning functions
A serial lamp set having security warning functions comprising at least one serial lamp set unit composed of a plurality of light emitting elements, insulated electric wires, and power source...
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7265494 |
Intelligent user interface with touch sensor technology
An electronic circuit including a microchip for use as an intelligent user interface also comprises touch sensor technology that differentiates between proximity and physical contact events to...
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7245224 |
Methods and systems for diagnosing projection device failure
Projection device failure may be diagnosed by sensing improper operation of projection lamp ignitor circuitry. An ignitor failure indicator may be activated based on a sensed failure in the...
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7238326 |
Germicidal treatment system with status indicator
There is disclosed a germicidal treatment system having a status indicator. The germicidal treatment system comprises at least one mounting assembly attachable to an outside of a wall of an air...
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7239093 |
System and method for controlling luminance of an LED lamp
A system for controlling luminance of an LED (Light Emitting Diode) lamp includes an MCU ( 3 ), an LED circuit ( 4 ), an LED lamp ( 5 ), and a display ( 6 ). The MCU controls the LED circuit to...
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7190121 |
Systems and methods to control light-emitting diodes
According to some embodiments, systems and methods may be employed for receiving a power consumption signal. An on-state of a light-emitting diode may be defined. A duty cycle of the light-emitting...
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7122971 |
Driver circuit for driving a plurality of DC lamp strings
A driver circuit for a DC light source supplies a voltage generated by a DC-to-DC converter for a plurality of lamp strings connected in parallel and a plurality of driving currents generated by a...
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7119459 |
Intelligent switch for connecting power to a load
A switching circuit includes a microchip which, in response to a signal from a signal switch, controls the operation of a power switch which, when closed, connects a load to a battery. The...
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7120560 |
Lamp monitoring and control system and method
A system and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control system...
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7113893 |
Lamp monitoring and control unit and method
A unit and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control unit comprises a...
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7081719 |
Computer power supply with a display function
A computer power supply with a display function has a rectifying circuit, an EMI filter, a power factor corrector, a switching circuit, a transformer and a secondary coil voltage regulator located...
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7067994 |
Electronic ballast with overvoltage monitoring
An electronic ballast for at least one gas discharge lamp (LA), preferably for a fluorescent tube, having a rectifier circuit ( 2 ) connectable to a supply voltage source, a smoothing circuit ( 3 )...
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7023353 |
Warning device status circuit including a status output device
A warning device including a status and function indicator circuit for indicating the status and function of the warning device. In a visual warning device such as a strobe light, the status and...
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6967445 |
Circuit continuity and function monitor
A circuit to monitor electrical continuity through a light bulb when the light bulb is switched off, and to monitor proper functioning of the light bulb when the bulb is switched on. The circuit...
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6917164 |
Light signaling device related to the operating state of a system
A light signaling device related to the operating state of a system has at least one light and circuits of detection of a failure of this or these lights, in which each light comprises m branches...
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6909248 |
Deuterium arc lamp assembly with an elapsed time indicator system and a method thereof
A lamp system includes a light source and an elapsed time indicator system which is coupled to the light source. The elapsed time indicator system accumulates a count of elapsed time of operation...
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6889174 |
Remotely controllable distributed device monitoring unit and system
A unit and method for remotely monitoring and/or controlling an apparatus and specifically for remotely monitoring and/or controlling street lamps. The lamp monitoring and control unit comprises a...
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6885297 |
Process for management of a light signaling device, and a device using this process, particularly for avionics
This invention relates to a process for management of a light signaling device related to the operating state of a system comprising several lights each comprising several branches of several light...
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6850010 |
Microwave powered lamp with reliable detection of burned out light bulbs
The invention is a microwave powered lamp ( 10 ). The lamp includes a light reflective cavity ( 28 ); an electrodeless bulb ( 16 ) contained in the light reflective cavity ( 26 ) from which light...
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6803727 |
Light system for use especially by operating theatre
A lighting system, preferably for use in operating theatres, in which at least one light source is mounted to be movable an adjustable in a single ceiling and/or wall element in the form of a...
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6791276 |
Gradually lighting/dimming wireless transmission indicator lamp
Gradually lighting/dimming wireless transmission indicator lamp used in a wireless data transmission apparatus. The wireless transmission indicator lamp includes at least one light emitting diode,...
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6791275 |
Low pressure gas discharge lamp ballast with on-off indicator
A ballast for a low pressure gas discharge lamp, preferably of the heated-filament type, includes an on-off indicator for a lamp. The ballast includes a load circuit with a lamp, and a driver for...
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6774768 |
System and method for cycling a metal-halide lamp on and off at designated intervals to reduce risk of arc tube rupture
An apparatus and method for cycling power to a HID ballast and amp in order to reduce the possibility of arc tube rupture or non-passive end of life light source failure with a warning indicator...
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6768269 |
Plasma process chamber monitoring method and system used therefor
A plasma process chamber is monitored for excess current while fabricating a semiconductor device. The method includes grounding the plasma process chamber in which fabricating a semiconductor...
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6762563 |
Module for powering and monitoring light-emitting diodes
LED lamp circuitry that emulates an incandescent lamp's behavior upon remote verification of the LED lamp. The LED lamp circuitry presents an input power switch circuit, a fuse blow-out circuit and...
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6731079 |
Industrial lighting control system and method
A lighting control module for controlling power to a lamp is presented. The lighting control module comprises a receiver for receiving electronic communications from a central controller, a current...
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6720883 |
Warning device status circuit including a status output device
A warning device including a status and function indicator circuit for indicating the status and function of the warning device. In a visual warning device such as a strobe light, the status and...
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6664790 |
Automated diagnostic tester for HID lamp luminaires
In an embodiment of the present invention, an automated diagnostic tester system is configured for use with a lighting fixture connected to a power source and including at least one of a ballast...
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6611114 |
Control circuit assembly for fountain display apparatus
A control circuit assembly installed in a fountain display apparatus for controlling the reproduction of music and the formation of artificial springs and a lighting effect subject to the...
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6603342 |
Light emitting element driver with low supply voltage
A light emitting element driver composed of two transistors, one ground resistor, one inductance and a single capacitor is arranged to drive an LED with a supplied voltage as low as about 0.92 V....
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6534988 |
System for testing the presence of an ignitor pulse within a high intensity discharge luminaire
An ignitor monitoring device is provided which is enclosed within a housing to allow for portability while testing high intensity discharge (HID) luminaires. The device is placed in the lamp socket...
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6518707 |
Voltage detector for series light circuit
A string of miniature holiday lamps connected in a series circuit with each lamp having an indicating device connected in parallel to its respective lamp. The indicating device is operated in...
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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...
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6448716 |
Solid state light with self diagnostics and predictive failure analysis mechanisms
A solid state light apparatus ideally suited for use in traffic control signals having a Self Diagnostic/Predictive Failure Analysis (SD/PFA) function facilitating a real time status of the signal...
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6429597 |
Externally mountable discharge lamp ignition circuit having visual diagnostic indicator
An ignitor and ignitor monitoring device is provided which is externally and detachably mounted to a high intensity discharge (HID) luminaire. The ignitor monitoring device provides a visual...
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6392352 |
Burnout protection for lamps wired in series
A plurality of lamps are connected in series. A plurality of burnout detector mechanisms are provided where one of the burnout detector mechanisms from the plurality is connected across a...
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6368270 |
Lighting apparatus for endoscope and method of using an endoscopic system provided with the lighting apparatus
A lighting apparatus for an endoscope, includes: a light source for emitting light which is transmitted to a distal end of the endoscope via a light guide of the endoscope; a consumption recording...
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