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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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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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6049175 |
Arrangements relating to light emitting devices
A light transmitting arrangement includes a light emitting device, for example a light emitting diode and an arrangement for peaking the current through the light emitting device upon switching on...
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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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5982114 |
Control apparatus for copying machine or the like
A control apparatus for a copying machine or the like, has a halogen lamp for exposing an original, a detection circuit for monitoring a turn-on voltage of the lamp, a comparator for comparing the...
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5956535 |
Flash device
In a flash device arranged to perform flat emission by detecting the intensity of light emission of a discharge tube during process of the light emission and by controlling the intensity of light...
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5892332 |
Starter for a high-pressure gas discharge lamp
On one side, a high-pressure gas discharge lamp (10) is connected, by way of the secondary winding (16) of an ignition transformer (14), to a line (11) and, on its second side, to a second line...
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5883471 |
Flashlamp pulse shaper and method
A circuit and method for energizing a discharge device, such as a flashlamp. A discharge device is electrically coupled to a pair of capacitors which are both charged to a desired potential level....
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5869936 |
Strobe device
A strobe device according to the present invention includes: a main capacitor; and step-up means including at least one step-up capacitor, the at least one step-up capacitor being rapidly charged...
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5842047 |
Strobe light and photographic camera incorporating the same
A strobe light which emits light by supplying a flash discharge tube with the electric charge stored in a main capacitor uses an aluminum-electrolytic capacitor having a dissipation factor (tanĪ“)...
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5814948 |
Flash circuit for low cost cameras
A flash circuit for a low cost camera in which a voltage dependent resistor is employed as a flash capacitor charge voltage sensing device to perform a control effect in the flash circuit, such as...
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5780976 |
Constant-voltage automatic charging strobe circuit
This invention is designed to reduce the number of parts in the circuits of a constant-voltage automatic charging strobe circuit, thus reducing the cost. In addition, it allows a user to decide...
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RE35837 |
Microprocessor-controlled strobe light
A flashtube circuit includes a switch which in a first position regulates the storage over time of energy in a first energy storage device and in a second position allows the transfer of energy...
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5747944 |
Flash device having plural emission modes in one of which a flash inductor is selectively short-circuited
In a flash device of the kind having a coil connected to a flash lamp and arrange to bring about a flat emission by the action of the coil, a switching circuit is arranged to short-circuit the coil...
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5739643 |
Device for supplying electric power to flashlamp and method thereof
An output from a D.C. power source is supplied to a flashlamp through a high speed switching circuit. A current detection circuit detects a current from the high speed switching circuit and a...
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5721986 |
Camera and strobe charging system
Disclosed is a camera provided with a strobe system. The strobe system includes a capacitor to be charged. Charging voltage of the capacitor can be detected through an output terminal. The output...
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5717962 |
Electric flash apparatus using MOS controlled thyristor
A power supply circuit includes a booster circuit for boosting an output voltage from a power supply battery to predetermined positive and negative voltages, respectively. A main capacitor is...
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5708878 |
Flash control circuit
A flash control circuit for use with a system controller is disclosed. The circuit includes a booster unit for receiving a first voltage signal and for outputting a second voltage signal to a lamp....
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5668445 |
Electronic flash apparatus with constant duration repeated flash
An electronic flash apparatus having: a condenser; a flash tube which is connected with said condenser and flashes when electricity stored in the condenser is discharged; and a flash operation...
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5661372 |
Stroboscopic instrument having a gate-controlled-switching element and a step-up power means therefor
A stroboscopic instrument is constructed of a gate-controlled switching element forming a discharge loop that is connected in series with a discharge lamp and main capacitor for storing charge that...
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5640620 |
Radiation regulating device for an electronic flash device and method for regulating same
With an electronic flash device that utilizes an IGBT, circuit construction can be simplified using a single condenser as both the trigger condenser of a trigger circuit and the voltage doubling...
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5640070 |
Electronic flash apparatus with a protective circuit which limits heating
In an electronic flash apparatus having a flash tube (2) which is disposed inside a reflector (3), having a storage capacitor (5) which can be discharged via the flash tube having a d.c. voltage...
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5640624 |
High-speed charge flash for a camera
A high-speed flash charging system for a camera accelerates flash charging time by storing electrical energy in capacitors in a first charging section when photographing is started after power is...
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5634153 |
Static immunity for single touch flash charger control
An electronic flash device includes an illumination element, an actuation circuit having a flash capacitor providing energy releasable to illuminate the element, and a self-oscillating charging...
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5602446 |
Fast repetition rate (FRR) flasher
A fast repetition rate (FRR) flasher suitable for high flash photolysis including kinetic chemical and biological analysis. The flasher includes a power supply, a discharge capacitor operably...
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5592257 |
Electronic flash device with slave emission function
An electronic flash device having a slave emission function and a standby mode, includes a setting member for setting the slave emission function, activation means activated in response to an input...
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5587629 |
Transformerless high-voltage generator circuit
A transformerless high-voltage generator circuit includes an amplifier and a feedback circuit connected together to form an oscillator. Due to the configuration of the feedback circuit, a...
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5574337 |
Single touch flash charger control
An electronic flash device including a self-oscillating charging circuit, a momentary trigger for initiating oscillations of the circuit to charge a flash capacitor, and a voltage sensing device...
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5570077 |
Ambient condition detector with high intensity strobe light
A drive circuit for use with an ambient condition detector limits heat dissipation and associated temperature rises in the presence of varying RMS values of an applied AC signal. The drive circuit...
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5532555 |
Electronic flash apparatus using gate controlled switching device directly driven by CPU
An electronic flash apparatus having a main capacitor for storing charges, a discharge light emitting tube for emitting light in accordance with the charges stored in the main capacitor, a CPU for...
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5530320 |
Flash fire control system for leaf shutter cameras
A device for controlling the firing of one or more electronic flash units by a leaf type camera shutter. Flash synchonization is provided by switch selectible modes at shutter opening, at shutter...
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5523654 |
Flashtube trigger circuit with anode voltage boost feature
This circuit facilitates the triggerability of a remote three wire flashtube and trigger coil assembly at a much lower than normal anode power supply voltage. The discharge of the trigger capacitor...
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RE35196 |
Electronic flash control device employing a plurality of control signals
An electronic flash control device makes sure that the emission of light of an electronic flash is not impaired by a noise component signal prior to generation of a suitable quantity of light by...
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5498935 |
Laser flash lamp control system
An apparatus and method for controlling the current delivered to a flash lamp is disclosed. The apparatus and method is particularly useful for controlling the current delivered to a flash lamp...
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5485361 |
Flyback charging with current mode controlled flyback converter
A flyback charger for an energy-storage capacitor has a controller for causing the energy-storage pulses of current in the transformer primary winding and the energy-delivery pulses of current in...
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5461286 |
Circuit arrangement for operating a low-pressure discharge lamp, typically a fluorescent lamp, from a low-voltage source
To operate a low-pressure discharge lamp, typically a fluorescent lamp, from a low voltage source of, for example, between 5 and 24 V, two diodes (D1, D2) polarized to provide for current passage...
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5461288 |
Power management device for large electronic flash units
A device for controlling the surge of electrical current demanded following the discharge of a lighting system comprised of multiple electronic flash units powered from a common source. Individual...
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5446349 |
Strobe circuit utilizing optocoupler in DC-to-DC converter
A strobe alarm circuit which utilizes an optocoupler in the DC-to-DC converter portion of the circuit for repetitively connecting and disconnecting an energy-storing inductor across a DC power...
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5442260 |
Light-emitting element drive circuit
A light-emitting element drive circuit for a camera comprises a diode and a light-emitting element connected in series with each other between a power source and ground, a first switching element...
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5436531 |
Flash triggering system
A flash triggering system inductively coupled to a flash tube assembly's flash tube of a through-the-lens (TTL) strobe unit. The flash trigger monitors the electromagnetic field directly...
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5432410 |
Electronic flashing device having a specific type of main capacitor sensing circuit
A series circuit of a pass condenser and a neon lamp operate as a voltage detecting device. A resistance voltage dividing circuit has a connecting point between voltage dividing resistances which...
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5422543 |
Flash monitor alarm system
A flash monitor alarm system is provided for detection of emergency vehicle flashers or for detection of flashes in photography. For emergency flasher detection the unit is positioned in a vehicle...
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5379089 |
Flash control device using cascade-connected thyristor and MOSFET
The semiconductor device is composed of a thyristor and a MOSFET cascade-connected. The thyristor includes a bipolar transistor cascade-connected with the MOSFET, the base (p - - semiconductor...
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5264895 |
Flash lighting circuit
To provide a small-sized and inexpensive flash lighting circuit for a camera capable of fully reducing red eyes reflection, a sub capacitor, a main capacitor and a flash discharge tube are...
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5255277 |
Electronic pulse width controller for flashlamp pumped lasers
A flashlamp pumped laser is controlled to emit a series of narrow pulse width laser pulses in quick succession. A control circuit associated with the flashlamp receives firing signals of limited...
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5250977 |
Electronic flash unit
An electronic flash unit being effective in emitting light repeatedly at high speed by boosting an applying voltage between main electrodes of a flash discharge tube twice or more as much as a...
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