Title:
STYLUS CLEANING DEVICE
Document Type and Number:
Japanese Patent JPS56140508
Kind Code:
A
Abstract:
Accumulated foreign material on the signal pickup stylus of a video disc player tends to degrade the quality of the recovered information signal. The recovered information signal is detected and the nominal amplitude of the recovered signal is compared against a reference amplitude. The occurrence of a decrease in recovered signal amplitude below the level of the reference causes a comparator to generate a control or trigger pulse. The control pulse activates a pulse generator to produce a predetermined pulse sequence which is applied to a stylus deflection transducer to move the stylus fore and aft radially across the disc and thereby dislodge the foreign material from the pickup stylus.
Inventors:
RICHIYAADO UIRIAMU NOSUKA
Application Number:
JP3191581A
Publication Date:
November 02, 1981
Filing Date:
March 04, 1981
Export Citation:
Assignee:
RCA CORP
International Classes:
G11B3/12; G11B3/58; G11B5/41; G11B9/06; G11B9/07; G11B21/02; G11B23/50; G11B27/36; G11B; H04N; (IPC1-7): G11B3/58