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7592752 |
Lighting control circuit for flash discharge tube and method of use
A lighting control circuit for a flash discharge tube can include an IGBT drive circuit and a timer circuit provided in parallel to each other to output a drive voltage to an IGBT device. An OR...
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7545104 |
Power supply circuit for flash discharge tube
A voltage is applied across the positive electrode and negative electrode of a flash discharge tube (xenon flash lamp) to emit light by a charge and discharge capacitor. This voltage application...
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7522831 |
Charging device for camera flash
A charging device ( 1 ) for a camera flash includes a digital signal processor ( 10 ) providing a pulse width modulation signal and receiving a feedback signal, a voltage boosting circuit ( 20 )...
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7512333 |
Method and apparatus for powering a strobe for retinal imaging
A lightweight, small, high-voltage power supply for a xenon flash lamp or strobe permits rapid and reliable strobing for retinal imaging. In one embodiment the power supply can develop 500 volts at...
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7414370 |
Increasing reliability of operation of light emitting diode arrays at higher operating temperatures and its use in the lamps of automobiles
A lamp in which a LED array is coupled to a transistor such that the same amount of current flows through both. The voltage level at the control (e.g., base) terminal of the transistor is...
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7403096 |
Apparatus and method for synchronizing visual/audible alarm units in an alarm system
An apparatus and concomitant method of reducing the number of synchronization pulses transmitted to the alarm units for increasing the reliability of the overall alarm system is disclosed. The...
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7310246 |
Capacitor charging circuit and strobe apparatus comprising same
A capacitor charging circuit does not include a Zener diode and makes it possible to integrate a large number of circuits and elements within a semiconductor integrated circuit. The capacitor...
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7030571 |
Stroboscopic illuminator
A photographic illumination system, comprising a first stroboscopic flash tube, for emitting an intense broadband illumination pulse comprising ultraviolet rays; a second stroboscopic flash tube,...
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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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7005971 |
Building alarm system with synchronized strobes
In a building fire alarm system, the light strobes of a network of strobes are synchronized to flash simultaneously. Each strobe has a charging circuit to charge a capacitor which discharges...
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6965203 |
Method and circuit for repetitively firing a flash lamp or the like
Disclosed is a method and circuit for repetitively firing a flash lamp. The method utilizes a power supply having a periodic voltage signal. The method times the discharge of the flash lamp to...
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6906472 |
Articles with flashing lights
Illuminating devices may be added to clothing and accessories worn by persons. Articles to which the illuminating devices may be added include footwear, hair-control articles, belts, suspenders,...
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6851817 |
Wheel incorporating a flashing light feature
A wheel incorporating a flashing light feature includes a power source, a plurality of lighting elements and a flashing circuit to selectively provide lighting signals to the plurality of lighting...
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6822400 |
Processor controlled strobe
A strobe light responds to both an input voltage range of about 8-40 volts and a selectable candela output. A programmed processor stores a plurality of electrical parameters which correspond to...
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6819059 |
Flash strobe power supply system and method
A reliable strobe power supply is disclosed that provides requisite light energy for emergency uses without causing EMI problems. A two phase dual flyback power converter operating in transitional...
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6724989 |
Camera strobe recharging integrated circuit
A camera strobe recharging IC includes a one-shot unit, an R-S latch block unit, a PWM control unit, and a ready control unit. The one-shot unit provides square wave signals. The R-S latch block...
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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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6696799 |
Diagnostic system for a strobe lamp and its operating circuit
In order to diagnose a strobe lamp system in a manner to isolate failure (burn out) of the strobe lamp from failures in its operating circuits, particularly the DC-DC converter which provides...
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6693392 |
Method and apparatus for generating a flash or a series of flashes from a multiparameter light
A multiparameter light is a type of theater light that includes an arc lamp and a shutter in combination with one or more optical components for creating various lighting effects, suitable...
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6674247 |
Efficient photographic flash
Photographic flashes use the major portion of available energy in modern cameras. A series of innovations within a photographic flash system improves the energy efficiency by a factor of 3, and...
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6630798 |
Electronic flash device of automatic light adjusting type
An electronic flash device of an automatic light adjusting type includes a main capacitor for storing charge at a high voltage. A flash discharge tube generates flash light upon discharging the...
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6593705 |
Rapid-firing flashlamp discharge circuit
A flashlamp circuit includes a charge reservoir that receives a first voltage from an external source. The charge reservoir is coupled to a resonator and a plurality of discharge capacitors to...
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RE38183 |
Synchronization circuit for visual/audio alarms
A strobe alarm system which includes multiple normally self-timed strobe circuits connected in a common loop to a fire alarm control panel, and a sync control circuit, which may be incorporated in...
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6563849 |
Drive circuit for light emitting device
A drive circuit is provided with a source follower circuit 2 consisting of an NMOS-FET connected to the anode side of light emitting device 1 and adapted to directly drive the light emitting...
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6556132 |
Strobe circuit
A visual alarm device includes a flash tube that provides a visual indication responsive to trigger a signal. A strobe circuit is coupled between the flash tube and a power source and causes a...
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6501231 |
Metal halide lightbulb strobe system
The system contains a quartz arc tube surrounding a gas tight envelope containing mercury, a metal halide, a rare earth gas and a pair of end to end spaced apart tungsten electrodes attached at a...
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6483254 |
Led strobe light
An LED strobe light is disclosed. The strobe light ( 600 ) uses light emitting diodes ( 402 ) arranged about the circumference of an electrically insulative, thermally conductive disk ( 404 ) to...
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6476564 |
Flash light emitting device
The flash light emitting device includes a charging circuit for charging the light emitting energy into a capacitor by boosting a power supply voltage, and a light emitting circuit for making a...
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6456797 |
Electronic flash unit with alternative capacitor switching
An electronic flash unit has alternative (dual) capacitor switching to reduce flash ready time for flash firing.
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6376996 |
Warning light synchronization
The gating of energizing current flow to a relatively low intensity light source is controlled by monitoring the flow of energizing current to an associated strobe light. The controller produces...
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6373197 |
Controller for flash lamps sharing a common power source and controlling method thereof
A controller is provided for several sets of flash lamps that shares a common power source. The controller comprises a high-voltage charging/discharging circuit and several sets of flashing...
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6271634 |
Strobe lighting control system
A system for controlling a strobe light or the like with serial data has a first processor for decoding or recognizing commands, and a second processor for executing the commands. The serial data...
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6249088 |
Three-dimensional lattice structure based led array for illumination
A lighting system comprising a plurality of light-emitting diodes and a power supply source for driving current through a plurality of parallel disposed, electrically conductive branches, wherein...
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6243001 |
Variable intensity visual signaling system
An emergency signaling device for the hearing impaired provides a strobe light in which the intensity of the emitted light is variable. The emergency signaling device comprises a housing and a...
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6160356 |
Strobo system used for camera
When the charging voltage across a main capacitor 29, as detected by a charging voltage detector 36, is below a predetermined level, the "on" period pulse duration of the strobo pulse signal from a...
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6157140 |
Sequentially pulsed energy flow loop
A plurality of energy emitters, such as flash tubes for visibile light or speakers for audio emissions, are placed in communication with an appropriate trigger circuit, one circuit for each of the...
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6155694 |
Composite warning light with emission pattern matching
A multi-flash strobe light pattern is superimposed on each individual light pulse produced by an incandescent lamp to provide a warning signal of enhanced visibility in a particulate laden ambient...
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6153981 |
Strobing light control adapter
A strobing control adapter (10) includes first electrical connectors (52, 54), for connecting the adapter (10) to a power supply (12), and second electrical connectors (56, 58), for connecting the...
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6087781 |
System for controlling fluorescent lamp operation and illumination
Control circuitry causes a fluorescent lamp to flash by cycling the primary of the lamp ballast reactor at a desired cycle rate. This results in the average lamp wattage output being generally...
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6087780 |
Control panel for Christmas lights
A control panel for Christmas lights including a housing having a pole extending downwardly therefrom. A lower end of the pole is sharpened for being inserted within a ground surface. A control...
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6081076 |
Fill-in light emitting apparatus and still video camera
A fill-in light emitting apparatus having an illuminating mechanism for emitting illumination light whose color temperature can be varied; a color temperature metering mechanism for measuring the...
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6078145 |
Synchronous two wire multiple strobe autotrigger control circuit
An apparatus for simply retrofitting pre-existing vehicular incandescent hazard flashing lamps or strobe assemblies having high voltage wiring with low voltage, low-cost, two wire synchronized...
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6066926 |
Electronic flash device and power supply circuit
An electronic flash device in which a voltage of a power supply battery is boosted to be supplied to a load, includes a first oscillation portion of self-excited type, a second oscillation portion...
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6064159 |
Power-saving stroboscopic device
In a power-saving stroboscopic device, a main capacitor is not completely discharged even in full light emission, so that a predetermined amount of charge can be left in a main capacitor, in order...
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6054814 |
Camera flash charging apparatus for low cost single use camera
In a flash circuit for a single use camera, a minimum residual charge voltage level is maintained on a flash capacitor to ensure availability of an energy source to operate an auxiliary circuit,...
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6034486 |
Electronic flash device
The present invention relates to an electronic flash device which, even if the charged voltage of a main capacitor is low, can securely effect a trigger operation by making a trigger voltage higher...
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6011359 |
Multiple flash/single lamp circuit for fast sequential strobing
The present invention discloses a multiple flash/single lamp circuit for fast sequential strobing. More particularly, the present invention comprises a flashlamp, a pair of capacitors, a voltage...
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5990631 |
Stroboscope circuit controlling dimmer operation
In a current cut-off type automated stroboscope circuit which controls a flashlight intensity by cutting off the current flowing through a flash lamp, a high-speed semiconductor switching device...
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5898277 |
Apparatus for controlling illumination of a fluorescent lamp
An apparatus for controlling illumination of a fluorescent lamp is disclosed which includes two transformers for heating cathodes of the fluorescent lamp. Also included are two ballasts for...
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5892334 |
Adjustable timing light
A adjustable timing light including a housing having bottom portion and a top portion. The top portion of the housing is pivotally coupled to the bottom portion of the housing such that the top...
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