Hitachi, Ltd.

Teruo Hoshi

Hideo Nishijima

Kouji Minabe

Kouji Kaniwa

Hiroya Abe

Yoshio Narita

Masayuki Kijima

Akinori Shiozawa

Hiroyuki Tarumizu

Satoshi Nidaira

Ryohei Kittaka

Akihiro Musha

Takashi Tsujio

Michio Sagawa

In order to stably detect a flicker under an illumination of a fluorescent lamp with an XY-addressed-scanning type image sensor used and to cancel the flicker, the present invention provides an image sensing device, wherein a video signal in any area on an imaging plane is first integrated per frame period, then an integrated value in a current frame is sequentially compared with a one-frame previously integrated value, next whether a variation pattern of the integrated value matches one of flicker patterns when the flicker occurs is determined, then an existence of the flicker is determined when an identical flicker pattern is seen more than two consecutive times.

Image sensing device

When a video signal reproduced by a helical scan type video signal reproducing apparatus is displayed on the screen of a liquid crystal matrix circuit, a change in brightness on the screen is eliminated in a mode for displaying a trick reproduced image such as a noiseless search image, a still image or the like with respect to a mode for displaying a normally reproduced image, thus providing the user with displayed images causing a less feeling of strangeness. During normal reproduction, where a video signal is continuously written into a liquid crystal display circuit, the brightness of the liquid crystal display circuit is controlled based on the value in a reference brightness register set by the user. During trick reproduction, where a video signal is discontinuously written into the liquid crystal display circuit, the liquid crystal display circuit is controlled to display an image relatively darker than the value in the reference brightness register. This eliminates the difference in brightness between a normally reproduced image and a trick reproduced image, thereby allowing the user to have a less feeling of strangeness.

Video signal reproducing apparatus and video signal display apparatus

A magnetic recording and reproducing apparatus arranged to use a magnetic tape. The apparatus operates to derive the current taken-up position of the magnetic tape from the signals that are proportional to the rotation frequencies of a capstan motor, a supply reel and a take-up reel. Only when the taken-up position is near the tape end, the apparatus activates LEDs (light emitting elements) for sensing the tape end and photo-transistors (light receiving elements), for sensing the tape end.

Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor

Magnetic recording and reproducing apparatus arranged to save electric

A VCR integrally provided with a camera (camcorder) stops power supply at a non-recording mode for reducing power consumption. The camcorder is arranged to have power control units and a switch for controlling the start or the end of the recording operation and the power-on or power-off of at least one or more of a camera section, a VCR section and a display section, a time measuring unit, and a control unit for starting the recording unit a predetermined time later than when the camera section starts to pick up an image sequence and the image sequence appears on an electronic viewfinder or the like. Further, the camcorder includes units for moving a zoom lens to a Wide-terminal when powered off, when powered on or a predetermined time later than when powered off. Moreover, there are provided units for overlapping text information with the image sequence appearing on the electronic viewfinder. These units display a time left until the recording start. The camcorder further provides units for varying a predetermined time left until the recording start and units for selecting a moving timing on which the zoom lens is moved to the Wide-terminal so that the user may freely set the predetermined time and the moving timing.

Camcorder and controller

Growing community of inventors

Mito, Japan

Teruo Hoshi