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7522832 |
Apparatus and method for strobe charging
An apparatus and method for strobe charging is disclosed. The apparatus and method can dynamically adjust a charging current according to current power level of a battery, thereby stabilizing the...
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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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7359632 |
Flash apparatus, image capture apparatus having a flash apparatus, and method of controlling a flash apparatus
A flash apparatus or an image capture apparatus includes a charging unit, configured to boost a voltage of an electric source and a control unit, configured to calculate the sum of the light...
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7218205 |
Variable candela strobe with constant trigger voltage
A variable candela strobe unit couples a substantially constant trigger voltage to a trigger electrode of a gas discharge tube irrespective of the voltage provided across the tube which is...
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7043156 |
Strobe light emitting apparatus and camera
A strobe apparatus includes a xenon tube, which is a discharge tube, having a discharge light emitting portion and a light emitting portion terminal. Light is emitted from the xenon tube and is...
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6957017 |
Capacitor strobe charging device utilizing current detection to determine malfunction, and strobe and camera using same
A strobe device including a light-emitting tube, a main capacitor which accumulates energy and which supplies the energy to the light-emitting tube, a transformer circuit which includes primary and...
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6941070 |
Flash device and lens-fitted photo film unit with built-in flash device
A charging circuit includes an oscillation transformer and an oscillation transistor. The oscillation transistor oscillates at a secondary current returned from a secondary coil in the charging...
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6871016 |
Recyclable camera and method for assembling same
In one aspect of the present invention, camera electrical system is provided for use in a family of recyclable cameras each camera having a set of desired electronic functions. The camera...
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6856241 |
Variable candela strobe
A selectable candela strobe alarm unit includes an energy storage circuit to reliably discharge a gas filled output device. The circuit includes a primary energy storage capacitor and a secondary...
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6839510 |
Lens-fitted photo film unit, flash device, and lens-fitted photo film system
A flash device for a lens-fitted photo film unit pre-loaded with unexposed photo film is provided. A main capacitor stores charge. A flash emitter emits flash light. A flash circuit board charges...
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6828803 |
Strobe charge apparatus
This invention relates to a strobe charge apparatus for charging a capacitor using a flyback transformer. This invention provides a strobe charge apparatus which has a switching element that...
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6826365 |
Battery saving flash charger control
A flash circuit for use in a camera, the flash charging circuit comprising a flash light discharge circuit having a light emitting element electrically connected to a flash capacitor; a flash...
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6813443 |
Square wave modulated charging-control circuit for a flash unit of a camera
A flash unit charging-control circuit for a camera includes a voltage converter connected to a flash unit capacitor, a square-wave oscillator for causing current supplied by the voltage converter...
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6785470 |
Capacitor charging device utilizing current detection to determine malfunction, and strobe and camera using same
A strobe charging device includes a light-emitting tube; a main capacitor for accumulating energy and for supplying the energy to the light-emitting tube; a transformer circuit which includes...
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6735386 |
Flash control circuit
A strobe control apparatus comprises a strobe control circuit of a separately excited oscillating type, where the strobe control circuit includes a main capacitor that stores a charge for exciting...
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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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6714735 |
Capacitor charging device for a flash
A capacitor charging device for a flash, finishes charging the flash capacitor in a gradual manner. It has a flash capacitor, a voltage transforming circuit, a voltage mode pulse width modulation...
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6701077 |
Exposure control system and camera having same
In a first aspect of the present invention, a camera exposure control system is provided. The camera exposure control system has a shutter movable during an exposure period through a path of travel...
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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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6636700 |
Flash device, lens-fitted photo film unit, camera, light measuring device, and method of producing lens-fitted photo film unit
A lens-fitted photo film unit is pre-loaded with photo film, and is a flash built-in type. A booster circuit boosts power source voltage to obtain high voltage. A main capacitor stores charge at...
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6633728 |
Flash device, lens-fitted photo film unit, camera, and producing method for the same
In a lens-fitted photo film unit, a flash device has a booster circuit including primary and secondary windings, the secondary winding generating high voltage when power source voltage is applied...
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6584286 |
Electronic flash device
The present invention provides an electronic flash device, and in particular, an electronic flash device including forward and flyback type booster circuits. The two booster circuits are...
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6574430 |
Camera electronic system and method of assembling same
In one aspect of the present invention, camera electrical system is provided for use in a family of recyclable cameras each camera having a set of desired electronic functions. The camera...
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6564015 |
Electronic flash device
In an electronic flash device, a driving circuit ( 12 ) drives a piezoelectric transformer ( 13 ) in response to an oscillation signal of a predetermined frequency, which is output from an...
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6539176 |
Photometry device for camera
In a photometry device, a pair of transistors having the same properties. The first transistor is connected at its base to the CdS photo sensor, and at its collector to a resistor. The second...
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6526233 |
Circuit for a photographic flash
The circuit for a photographic flash having the usual components of a switching element, transformer, rectifier, flash capacitor, trigger device and flash tube presents very good value in respect...
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6516153 |
Capacitor charging apparatus and electronic flash and apparatus containing same
A capacitor charging apparatus includes a DC/DC converter for stepping up the voltage of a battery and charging the capacitor; a detection circuit that determines whether a primary current of the...
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6509695 |
Flash apparatus and camera having the flash apparatus
In a flash apparatus, when it is determined that the oscillation of a voltage boosting circuit is stopped before it is controlled so as to stop, it is possible to continuously charge a voltage to a...
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6505000 |
Camera including electronic flash, camera shake detecting system, and power supply control function for same
A camera in which an electronic flash emits light includes a capacitor for accumulating charge used to cause the electronic flash to emit light, a camera shake detector for detecting camera shake,...
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6466744 |
Strobe circuit, lens-fitted film unit, camera and printed-circuit board for strobe
There is described a strobe device to which another electronic circuit or electronic element is added, and a lens-fitted film unit and a camera, which incorporates the strobe device. The strobe...
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6404990 |
Flash unit
In a flash circuit of a flash device, a Zener diode ( 37 ) is connected to a tap point ( 23 f ) located at an intermediate position of a secondary coil of an oscillation transformer ( 23 ). The...
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6404989 |
Flash device
A flash device having a charging circuit which is arranged to be capable of changing between a flyback-type boosting action and a forward-type boosting action. The flyback-type boosting action is...
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6381414 |
Oscillation circuit and strobe device employing the oscillation circuit
A lens-fitted film unit incorporating a strobe device, comprises: a main body; a photographic film loaded in advance in said main body; a shutter; a photographic lens; and a strobe circuit included...
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6360060 |
Camera
The camera includes a printed wiring board on which electric parts are mounted, a strobe light emission part which emits and projects a lighting light toward an object to be photographed, and a...
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6351611 |
Battery check system for use in cameras
A battery check system for use in a camera has a monitor circuit and a control circuit. The monitor circuit detects the condition of a battery used in the camera. The control circuit controls the...
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6345151 |
Lens-fitted film unit with IC memory and method of writing data in IC memory
A lens-fitted film unit with an exposure mechanism which is equipped with a built-in flash and a pre-loaded film cartridge is provided with an IC memory in which exposure data is written, a write...
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6317566 |
Electronic flash device for photographic camera
An electronic flash device equipped with LED indicator for providing an indication of completion of charging a main capacitor and a circuit for lowering power consumption has a controlling...
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6311021 |
Multi-candela alarm unit
A strobe alarm unit having a plurality of selectable candela settings or intensity levels, for allowing an alarm installer to select a particular candela setting for the alarm unit in the field....
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6289180 |
Photoflash charging circuit with current and voltage monitor
A camera that includes a battery, a photoflash circuit, and a charging circuit to provide energy from the battery to the photoflash circuit is provided. The camera further includes a voltage...
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6285833 |
Camera
In a camera that has a pop-up strobe flash unit and that requires electrical power to operate functions additional to the pop-up strobe flash unit, there is provided a single mechanism that is...
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6249648 |
Camera flash circuit with optical data recording circuit
In a camera having a single battery cell power source, a flash apparatus is provided in combination with an optical data recording circuit in which energy to illuminate an LED illumination device...
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6233402 |
Camera frame assembly having actuable battery contact
A camera frame assembly or other apparatus has a flash unit having a self-oscillating charging circuit. The camera frame assembly is used with a filmstrip and a battery. The camera frame assembly...
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6219493 |
Electronic flash device of a separate excitation oscillating type
An electronic flash charger having an electronic flash charging circuit of a separate excitation oscillating. The charger includes: a flyback transformer, having at least a primary coil and a...
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6091906 |
Flash device
In a flash device, a three-terminal switch is provided for connecting or disconnecting between a secondary coil of an oscillating transformer and a base of an oscillating transistor, between 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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6064176 |
Electronic apparatus and flash device
An electronic apparatus capable of selectively using a plurality of kinds of batteries includes a battery discriminating circuit for making a discrimination of the kind of the battery used, and a...
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6061528 |
Flash device
In a flash device of the kind preventing a main capacitor from being overcharged by inhibiting a charging action on the main capacitor when the voltage of the main capacitor reaches a predetermined...
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6038408 |
Optical data recording circuit for a film camera
An optical data recording circuit includes an optical recording device normally illuminated from a camera battery means in conjunction with initiation of flash illumination in the camera flash...
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6029014 |
Light measuring apparatus and camera using the light measuring apparatus
A light measuring apparatus comprises an oscillation circuit, a first delaying circuit for delaying an output waveform of the oscillation circuit in accordance with a peripheral brightness, a...
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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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