The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1991
Filed:
Jul. 06, 1989
Richard M Vogel, Henrietta, NY (US);
Mitchell J Milton, Webster, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A still video camera produces a still signal for recording on a magnetic disk and a movie signal for displaying in an electronic viewfinder. In recording the still picture . . . after previewing the scene in the viewfinder . . . , a vertical synchronizing signal is recorded in predetermined relation to a reference position on the disk. Instead of phase locking the disk drive to the vertical synchronizing signal, the time base of the camera is 'locked' to variations in the location (phase) of the reference position. The camera is thus affected by a relatively instantaneous reset of the time base rather than an inertially-limited adjustment of the drive motor, which tends to 'blind' the electronic viewfinder for the duration and renders previewing unacceptable. By attempting the video reset only after the disk has been stabilized at a standard velocity (by a velocity servo) and by 'windowing' the reference position for 'acceptable' phase error, the viewfinder is further unburdened of visually-disruptive effects that impede effective still photography.