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| Number | Title | Issue Date |
| 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 emission amount within a predetermined period of time. The control unit red... | 04/15/2008 |
| 7291984 | Method of reducing RMS load voltage in a lamp using pulse width modulation A method of converting a line voltage to an RMS load voltage in a lamp includes modulating a load voltage with a pulse width modulation circuit that is entirely within the lamp and provides an RMS load voltage to a light emitting element of the lamp. Conduction is t... | 11/06/2007 |
| 7274148 | Lamp having fixed forward phase switching power supply with time-based triggering A lamp contains a lamp voltage conversion circuit that is entirely within a base for converting a line voltage at a lamp terminal to an RMS load voltage at a light emitting element. The voltage conversion circuit includes a forward clipping circuit with a three-term... | 09/25/2007 |
| 7119502 | Flashing discharge tube-use power supply and control method therefor A voltage for light emission is applied to the positive electrode 11 and negative electrode 13 of a flash discharge tube 3 (xenon flash lamp) by a charge and discharge capacitor 17. When the voltage of the charge and discharge capacitor | 10/10/2006 |
| 7106007 | Flashlight lamp circuit with automatic light adjustment A flashlight lamp circuit with automatic light adjustment includes a flashlight charging unit for controlling charging of a main capacitor, a flashlight activation unit activating the flashlight lamp to project a flashlight on the photographed object according to a ... | 09/12/2006 |
| 6577820 | Camera In a camera having an automatic flash light control system, a quantity of flash light illuminating an object is restricted by a value as an upper limit or a lower limit which is calculated by a distance to the object and an aperture value of a taking lens... | 06/10/2003 |
| 6029011 | Control device for flash device used for camera A control device for a flash device used for a camera, or a camera adapted to use a flash device, includes an object luminance detecting sensor part for making preliminary light emission before exposure and measuring object luminance obtained during the p... | 02/22/2000 |
| 5754897 | Strobe camera A strobe camera with a strobe emission section movable between a first position in which strobe light can be emitted and a second position different from the first position. A strobe state detection unit outputs a first strobe state signal when the strobe... | 05/19/1998 |
| 5260737 | Flash photographing system A camera system consisting of a flash device and a camera of the kind performing the so-called TTL flash control action is arranged to permit manual setting of a correction degree for the TTL flash control; to adjust the degree of light quantity control a... | 11/09/1993 |
| 5218398 | Exposure amount indicator A TTL automatic light modulation electronic flash device having transmission means, control means and indication means is combined with a camera. The electronic flash device receives a signal from the camera in the transmission means, and the control mean... | 06/08/1993 |
| 5172156 | Camera with minimum subject-distance alarm display device A camera with a too-close-subject-distance alarm display device, further comprising a flash device for flashing the light to a subject to be photographed; a selection device for selecting at least the flash exposure mode in which the flash device is permi... | 12/15/1992 |
| 5093681 | Flash apparatus for switching and selecting emission modes of open and automatic control schemes A flash apparatus which is detachably mounted on a camera main body is operated in a light emission mode of an open control scheme, in which the light emission amount of the light-emitting portion is controlled by a preset guide number, and in a light emi... | 03/03/1992 |
| 5014081 | Metering system A method and apparatus for reproducing subject tone in a photograph in a manner predetermined by the photographer comprises assessing the tonality of the subject with reference to a tonal scale by simultaneously viewing both the subject and the tonal scal... | 05/07/1991 |
| 4712902 | Device for indicating an object distance for flash photography In a device for indicating a camera-to-object distance for flash photography, an electronic flash device receives data from a camera, the data being indicative of a set value of film speed, a set value of exposure to be compensated from a proper exposure ... | 12/15/1987 |
| 4628229 | Flashlight emission apparatus A flashlight emission apparatus is provided which inhibits the emission of flashlight from a flash discharge tube before a voltage to which a main discharge capacitor is charged reaches a proper voltage level for emission. This occurs in response to an ou... | 12/09/1986 |
| 4540265 | Energy-saving electronic flash apparatus An energy-saving electronic flash unit for a rapid sequence of flash exposures includes status indicator apparatus operable for signaling the readiness of the flash unit for the next flash in the sequence as a function of the flash energy expended to prod... | 09/10/1985 |
| 4523830 | Automatic control type electronic flash apparatus An automatic control type electronic flash apparatus comprises means for emitting flashlight and flashlight emission stopping means. The stopping means receives the flashlight emitted by the flashlight emitting means and reflected by an object to be photo... | 06/18/1985 |
| 4518237 | Indicator for proper or improper exposure by automatic electronic flash An indicator for proper or improper exposure provided by automatic electronic flash includes a first decision circuit having a first decision level lower than a proper level of exposure, and a second decision circuit having a second decision level higher ... | 05/21/1985 |
| 4500190 | Camera system including flash and status indicating control circuit A camera flash device is provided for photography requiring the use of a flash by transmitting plural information from the flash side to the camera side. The flash device includes a plural flash signal generation circuit which generates flash signals from... | 02/19/1985 |
| 4494851 | Display unit for flashlight photography In a flashlight emission system, apparatus for lighting a flash tube to illuminate an object and for controlling the quantity of emitted light from the flash tube, the apparatus being cooperative with a camera having structure for presetting ASA speed of ... | 01/22/1985 |
| 4486690 | Test flash device for flash discharger A test flash device in a photographic flash discharger which includes a photometric circuit including an integrator and exposed to light emitted from a flash discharger tube and reflected by an object to be photographed. A light emission stopping circuit ... | 12/04/1984 |
| 4426143 | Overexposure indicator for an automatic electronic flash An overexposure indicator for an automatic electronic flash produces a time factor signal of a given duration after an emission terminate signal is delivered to an electronic flash. When the amount of flashlight emitted by the electronic flash reaches an ... | 01/17/1984 |
| 4354750 | Flash unit having a flash output control device In a flash unit including a power source portion including a battery and a heavy current consuming source; a flash discharge tube adapted to produce flashlight by the current from the power source portion; flash output control means for metering the refle... | 10/19/1982 |
| 4306176 | Operation indicator for automatic flash device An operation indicator for an automatic flashing device comprising a first indication means which visually indicates a reaching to a predetermined voltage of main capacitor and readiness for proper completion of flashing of an automatic light adjusting, a... | 12/15/1981 |
| 4294528 | Automatically controlled electronic flash device An automatic electronic flash device for use with a camera includes a flash tube carried by a housing. A battery is carried by the housing as a source of electric supply. A capacitor is connected to the flash tube to fire it when discharged. A circuit is ... | 10/13/1981 |
| 4274724 | Indicator circuit for auto-strobo unit An indicator circuit for an auto-strobo unit comprises a switching element which rapidly discharges a capacitor which, when adequately charged, feeds a display element indicating proper operation of the auto-strobo unit. The switching element is turned on... | 06/23/1981 |
| 4274723 | Auto electronic flash unit In conventional flash units it is impossible to photograph at a distance which is out of the range of the auto control distance indicator even though proper exposure may be possible due to the latitude of film and error margin in the guide numbers. With t... | 06/23/1981 |
| 4201934 | External sensor for electronic flash An external sensor which may be detachably electrically connected to an electronic flash of the type having a flash duration control circuit for controlling the flash duration of a flash tube which flashes by discharging the electrical energy stored on a ... | 05/06/1980 |
| 4164686 | Load current pulse control devices A device for controlling the termination of light emission by a flash device including means for detecting the light reflected from the subject being illuminated by the flash, integrating means connected to the detecting means for providing a flash termin... | 08/14/1979 |
| 4122465 | Device for indicating condition of exposure in an automatic control type electronic flash unit for flash photography An automatic control type electronic flash unit includes flashlight generator, a metering device for measuring the quantity of light emitted from the flashlight generator and reflected by an object to be photographed, a first detector for detecting the ou... | 10/24/1978 |
| 4118715 | Electronic photoflash having a terminal board An electronic photo flash capable of being used in cameras which are constructed so that only the special flash of the trade name "Flip Flash" is used as an artificial light source. The electronic photo flash has a terminal board to be plugged into the fl... | 10/03/1978 |
| 3999193 | Automatic control indication device in an automatic control type electronic flash unit In an automatic control type electronic flash unit having a light-sensing element for sensing reflection of light generated by an interior light discharge tube with the aid of charging current of a capacitor, light emission of the interior light discharge... | 12/21/1976 |
| 3993929 | Automatic correct exposure indicator A correct exposure annunciator for electronic flash apparatus includes an indicator which is turned on when the voltage on a capacitor is less than a predetermined value. The capacitor is discharged in response to a control signal which indicates that pro... | 11/23/1976 |
| 3979639 | Correct exposure annunciator circuit An electronic flash apparatus terminates the light flash when light received from the subject has reached a predetermined level. The light terminating means includes a terminating capacitor which is discharged during the termination of the flash. Annuncia... | 09/07/1976 |
