Title:
【発明の名称】可変シャッタ付テレビカメラ装置
Document Type and Number:
Japanese Patent JP3004382
Kind Code:
B2
Abstract:
A television camera equipped with a continuously-variable-speed electronic shutter function which can control the charge-storing time of a solid-state image sensor and an amplifier so that a video signal follows the optimum light amount for a subject at high speed and with high accuracy. A shutter-equipped image sensor (1) which is controlled by a shutter pulse generating unit (5) converts the light incident from an optical lens (1) into an electric signal. The electric signal, after passed through an amplifier (3) and a signal processing unit (4), is detected by a video level detecting unit (7) as a video level. A shutter control unit (8) holds the shutter amount corresponding to the video level for each field to immediately calculate an estimated shutter amount using a predetermined equation and supplies the calculated shutter amount to the shutter pulse generating unit (5) for each field. A control mode decision unit (9) exclusively controls a gain control unit serving as an AGC and the shutter control unit (8).
Inventors:
Kogane Haruo
Mimura year
Mimura year
Application Number:
JP9442891A
Publication Date:
January 31, 2000
Filing Date:
April 24, 1991
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04N5/225; H04N5/235; H04N5/335; H04N5/351; H04N5/353; H04N5/357; H04N5/372; H04N5/378; (IPC1-7): H04N5/235; H04N5/335
Attorney, Agent or Firm:
Masahiro Kurai