Methods and apparatus for post-assembly custom fine-tuning of an

Details Methods and apparatus for post-assembly custom fine-tuning of an Methods and apparatus for post-assembly custom fine-tuning of an

1988-11-10

1989-11-14

Ramsey, Kenneth J.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

445 3, 445 36, H01J 9236, H01J 944

Patent

active

048810061

ABSTRACT:
An internal electrostatic field-generating, beam-controlling element in a cathode ray tube is formed by depositing an initially continous layer of resistive material on a substrate and applying a voltage differential across the coating to generate a field-generating current therethrough during operation of the tube. After completion of tube assembly and sealing of the tube envelope, the element is custom fine-tuned by projecting an externally-originating laser beam through the envelope wall to selectively remove portions or areas of the resistive material, thereby predeterminately distorting the electrostatic field and selectively changing the effect of the field on the imaging electron beam. This procedure readily enables both correction of perceived deficiencies in and intentional modifications to one or more characteristics of the electron beam.

REFERENCES:
patent: 3643299 (1972-02-01), Brown
patent: 4662853 (1987-05-01), Veldhoven

Affiliated with

Also associated with

Rating

Methods and apparatus for post-assembly custom fine-tuning of an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus for post-assembly custom fine-tuning of an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for post-assembly custom fine-tuning of an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1854408