Patents Assigned to EFA Corporation
  • Dual-coil type CRT image tilt correcting device
    Patent number: 5475282
    Abstract: A dual-coil type CRT image tilt correcting device which includes a first ring coil mounted on the CRT of a monitor in front of the biased yoke and charged to produce a magnetic field for tilt correction control without causing much color change, and a second ring coil mounted on the CRT adjacent to the magnetic ring of the biased yoke and charged to produce a magnetic field in the reversed direction to compensate with the magnetic field of the first ring coil on the convergence of the electron beam.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: December 12, 1995
    Assignee: EFA Corporation
    Inventor: Steve Liao
  • Monitor
    Patent number: D355174
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: February 7, 1995
    Assignee: EFA Corporation
    Inventor: Steve Liao