Jennifer J Randall

US Patent:

55172369, May 14, 1996

Filed:

Jun 22, 1994

Appl. No.:

8/263782

Inventors:

Ronald G. Sergeant - High Point NC
Scott A. Corbin - Stevens PA
Theodore L. Jones - Akron PA
Gopi N. Mehrotra - Lancaster PA
Jennifer L. Randall - Lancaster PA

Assignee:

Philips Electronics North America Corporation - New York NY

International Classification:

H04N 718

US Classification:

348143

Abstract:

A video surveillance system includes a plurality of remote surveillance units, each of which has a video camera mounted in a dome housing. The video camera is panned and/or tilted to a desired orientation within the dome by a pan motor and/or a tilt motor. The surveillance system also includes a keyboard for entering user commands, a joystick for controlling the positioning of the cameras, a central processing unit for interpreting the user commands and the joystick movements, and a communication system for issuing operating commands to the remote surveillance units. Each remote surveillance unit is constructed and arranged to store and to recall selected camera control parameters in association with selected pan and tilt coordinates in response to commands entered by the user. The camera control parameters include white balance, focus, and shutter speed settings for the camera. Additionally, automatic control of the camera exposure, white balance, and focus is provided.

US Patent:

56276168, May 6, 1997

Filed:

Jun 22, 1994

Appl. No.:

8/263918

Inventors:

Ronald G. Sergeant - High Point NC
Scott A. Corbin - Stevens PA
Theodore L. Jones - Akron PA
Gopi N. Mehrotra - Lancaster PA
Jennifer L. Randall - Lancaster PA

Assignee:

Philips Electronics North America Corporation - New York NY

International Classification:

G03B 2900
G03B396427

US Classification:

354 81

Abstract:

A camera module for use in a surveillance camera system is provided. The camera module includes a housing and a pan-and-tilt mechanism that is mounted to the housing. The pan-and-tilt mechanism includes a pan motor for panning a camera and a tilt motor for tilting the camera. The pan motor is mounted on the pan-and-tile mechanism so as to be stationary relative to the housing. A slip ring, mounted to the pan-and-tilt mechanism, provides electrical connections to the tilt motor and the camera and a flex cable connects the camera to the slip ring. Also provided are methods for controlling unique functions of the surveillance camera system. Calibration of a home pan position for the camera is achieved by monitoring an optical homing sensor. Calibration of a home tilt position for the camera is accomplished by driving the camera against a stop. Thereafter, pan and tilt positions of the camera are tracked relative to the home pan and tilt positions.