Television camera

Abstract

Abstract PURPOSE:To display an optional important part in a video pattern onto a screen with an optimum lightness at all times by adding a selection extraction means extracting part of a video output signal to an output level control signal detection means. CONSTITUTION:An optical signal incident from an object 3 passes through an optical system 4 and an incident luminous quantity adjustment means 5 and is converted into an electric signal by a video sensor 6 and outputted to an output terminal 10 through a signal processing circuit A7, a gain control means 8 and a signal processing circuit B9. A control video output signal 101 being part of the output signal passes through a selection extraction means 2 and is fed to an output level control signal detection means 11. The output controls the incident luminous quantity adjustment means 5 and the gain control means 8. That is, only an important signal is extracted among the video output signal and fed to the output level control signal detection means 11. Thus, the lightness of the important part in the screen is displayed on the screen with an optimum lightness at all times independently of the lightness of the other part.

Inventors

• 👤 Masahide Tsuda
• 👤 昌秀 津田

Bibliographic Details