Title:
【発明の名称】撮像装置
Document Type and Number:
Japanese Patent JP2539488
Kind Code:
B2
Abstract:
A video camera comprises an image sensor for converting a projected light image into an electrical signal, an exposure time setting circuit for setting the exposure time for the image sensor to either one of a normal exposure time and an exposure time longer than the normal exposure time, and an automatic gain control circuit including a variable gain amplifier for amplifying a video signal read out from the image sensor and a detector for detecting an output signal level of the variable gain amplifier and supplying a gain control signal based on the result of detection to the variable gain amplifier. The automatic gain control circuit is controlled so as to make the response speed of the automatic gain control circuit, when the exposure time is set to an exposure time longer than the normal exposure time, lower than that preset when the exposure time is set to the normal exposure time.
Inventors:
IMAIDE TAKUYA
KINUGASA TOSHIRO
KINUGASA TOSHIRO
Application Number:
JP13548888A
Publication Date:
October 02, 1996
Filing Date:
June 03, 1988
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04N5/225; H04N5/235; H04N5/335; H04N5/341; H04N5/353; H04N5/357; H04N5/369; H04N5/374; H04N5/378; (IPC1-7): H04N5/235; H04N5/225; H04N5/335
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)