Patent · US Active

Surveillance camera

US9774796B2 · kind B2 · utility

0Cited by
1References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 12, 2015
Grant dateSep 26, 2017
Priority date
Expiry dateSep 12, 2035

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04N23/74
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

Provided is a surveillance camera including an optical system, an irradiator; an illuminance sensor, a photoelectric converter, an analog-digital converter, and a main controller. The optical system includes a lens. The irradiator irradiates a wave, different from a visible light ray, in a night mode. The illuminance sensor is installed in a light receiving direction different from a light receiving direction of the optical system. The photoelectric converter is configured to convert light from the optical system into an electrical analog image signal. The analog-digital converter is configured to convert the analog image signal from the photoelectric converter into a digital image signal. The main controller is configured to control the surveillance camera to switch between a day mode and the night mode according to gradation of the digital image signal and illuminance sensed by the illuminance sensor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.