Hitachi, Ltd.

Kenji Itoh

Hiroyasu Ohtsubo

Minoru Katoh

Iwao Takemoto

Toshiyuki Akiyama

Norio Koike

Masaaki Nakai

Shinya Oba

When defective pixels of a solid state image pickup device of a video camera are corrected by signal processes, a white spot noise is detected by closing an iris and by comparing the signal level and a level of only a dark current. Further, in this case, a gain of an AGC circuit for controlling a gain of a video signal is raised and a precise detection is executed. By executing such a detecting operation at the time of turn-on or turn-off of a power source, the user is not annoying. In the ordinary photographing, a reference level in detection of a white spot noise is set to an optimum value in accordance with a temperature of the solid state image pickup device or its peripheral temperature or the gain of the AGC circuit so that the white spot noise detection is not influenced by the temperature of the solid state image pickup device or the operating state of the AGC circuit.

Video camera with a function to correct defective pixels of solid state

In the interline type charge transfer imaging device, two of the three groups of wiring through which driving pulses are sent to each of three groups of electrodes constituting vertical charge transfer devices are arranged in horizontal direction and the remaining one group of wiring is arranged in vertical direction. Light-shielding layer is installed on the vertically running wires and the electrodes connected with those wires.

Interline type charge transfer imaging device

Growing community of inventors

Katsuta, Japan

Kenji Itoh