Canon Kabushiki Kaisha

Masanori Ohtsuka

Takanobu Tsunemiya

Kazunari Kitani

Takashi Ichimiya

Yasuhiro Harada

Hideo Taka

Yasuhiko Shiomi

Isao Nakazawa

Takanori Kodaira

Yukio Odaka

Ryuji Tokuda

Kiyoshi Alyfuku

Koichi Matsumura

Takashi Kosaka

Minoru Tanabe

Yoshiaki Honda

Yuichiro Konishi

Hidetoshi Masuda

Takashi Kobe

Yuuichi Matsuda

Tatsuo Fjuisaki

Koji Ohshima

Hiroki Sue

This invention includes accumulation units () which accumulate signals obtained by sensing units (), an area determination unit () which sets the size of an area of a sensing unit to be segmented into a plurality of areas on the basis of the information of a lens to be focus-detected, accumulation control units (-) which control, for each of the areas, accumulation of signals obtained in a plurality of areas by the accumulation units, and a defocus detection unit () which detects defocus states in the respective areas from accumulated signals from a plurality of areas.

Focus detection apparatus and focus detection method

In an image processing apparatus that is capable of setting desired image processing conditions for each of images that have been shot, an image of interest for which number of prints is to be set is specified and it is determined whether image processing conditions have been set for the specified image of interest. If image processing conditions have not been set for the specified image of interest, a number of prints for the image of interest is allowed to be set. If setting of number of prints has been allowed, then the setting of number of prints is accepted and the set number of prints is stored in correlation with the image of interest.

Image processing apparatus and method of controlling same

Focus detection apparatus and focus detention method

A control system comprises multiple memories consuming different current amounts for operation, wherein multiple programs corresponding to different functions are stored in the memories, wherein, in accordance with a function to be processed by an operating circuit, one of the programs is read from one of the memories and is processed, and wherein, from a specific memory for which the current consumed during an operation is equal to or smaller than a predetermined amount, the operating circuit reads and executes one of the programs that performs a function for which an operating time period is equal to or greater than a predetermined value.

Control system, recording device and electronic apparatus

An electric power supply control apparatus, which starts an interruption process upon detecting a voltage lower than a predetermined voltage, then detecting the electric power supply voltage again and, in case the predetermined voltage is recovered, does not execute a self resetting, thereby continuing a device control without executing a resetting operation in a situation where the electric power supply voltage is actually not lowered thereby not causing an erroneous operation of control means.

Power supply control apparatus

A photometric device according to the present invention performs the steps of: performing photometry in a first area of an overall area where photometry can be performed; performing photometry in a plurality of second areas, each included in the first area; and when a difference greater than a predetermined value exists among the photometric results in the plurality of second areas, correcting the photometric result in the first area based on the photometric results in the plurality of second areas and determining a backlight state exist based on the corrected photometric result. Alternatively, the photometric device performs the steps of: setting a reference value for determining a backlight state exist based on the difference between the photometric result in the first area and a photometric result in a peripheral area around the first area or a photometric result in the overall area; and when a difference greater than a predetermined value exists among the photometric results in the plurality of second areas, correcting the reference value based on the photometric results in the plurality of second areas. In this manner, partial photometry and spot photometry can be performed at a lower luminance, and a backlight atate can be more accurately determined.

Photometric device and camera

A camera includes a first power supply output circuit which outputs a first stabilized power supply voltage, a second power supply output circuit which outputs a second stabilized power supply voltage lower than the first power supply voltage, a photocoupler which has a light emitting element and a light receiving element, a detecting circuit which detects an analog signal output from the light receiving element and converts the analog signal to a digital signal, and a processing circuit which performs processing based on the digital signal. The first power supply voltage feeds into the light emitting element as an operating voltage thereof. The second power supply voltage feeds into the light receiving element and feeds into the processing circuit as an operating voltage thereof. The camera allows stable operations of the processing circuit with minuter elements and the light emitting element.

Photocoupler driving system and camera using system

A camera capable of print format selection includes a connecting unit for responding to at least one of a unit for forming information for focus adjustment on the basis of one of distance measurement information of a plurality of portions in a scene and defocus information, and a unit for different print formats, thereby affecting an operation related to at least the other unit, or includes a connecting unit for responding to at least one of a unit for a predetermined distance range and a unit for different print formats, thereby affecting an operation related to at least the other unit.

Camera capable of print format selection

An imprinting apparatus for use in a camera having an imprinting device including a date information imprinting mode for imprinting date information, time information, or the like on a recording medium, and a message information imprinting mode for imprinting message information formed of alphanumeric characters, graphic designs or the like, or a message in the message information in one language being changed into a message in a different language if necessary, and an operating device for performing different operations on the imprinting device using the same operating member with respect to each of the date information imprinting mode and the message information imprinting mode.

Imprinting apparatus for use in a camera

In a camera of the kind setting information when a film cartridge is stowed in the camera by reading a pattern from a data disk disposed on the film cartridge, an information reading action on the pattern of the data disk is allowed to begin when a predetermined period of time has elapsed after the film cartridge is stowed in the camera, so that the information reading action can be prevented from being performed while the film cartridge is still vibrating due to the stowing action.

Camera

The present invention relates to an electronic apparatus which is arranged to drive a load by means of a microcomputer to which the boosted voltage obtained by boosting a battery output by boosting means is applied. The present invention also relates to a method of making the boosting means inoperative upon completion of a load-driving operation by the computer after the battery output is restored to a predetermined level, and switching the voltage to be applied to the microcomputer in the electronic apparatus from the boosted output to the battery output, thereby preventing the microcomputer from malfunctioning due to a lowering in the battery output.

Electronic apparatus

A camera of the kind using a film cartridge capable of setting various film usage conditions permits normal photographing actions when the camera is loaded with the film cartridge in an unused condition and inhibits photographing actions when the camera is loaded with the film cartridge in a completely used condition. The operating modes of the camera include a test mode in which photographing actions can be carried out for tests at a factory by loading the camera with the film cartridge in any of the film usage conditions.

Camera using film cartridge capable of setting film usage condition

A camera includes a distance detecting device arranged to detect a distance from the camera to an object to be photographed and to output distance information, a flash amount deciding part arranged to decide an amount of flash emission on the basis of the distance information from the distance detecting device, and an aperture value deciding part arranged to decide an aperture value to be used at the time of starting flash emission on the basis of the amount of flash emission.

In a current mode DC-DC converter, the current flowing through a coil is switched and an output characteristic is controlled. The output of the converter is detected and the current flowing through the coil is limited according to the detected output only when the detected output is larger than a predetermined value to reduce the start-up time and improve output voltage regulation.

Growing community of inventors

Kanagawa, Japan

Masanori Ohtsuka