Projection television apparatus

Details Projection television apparatus Projection television apparatus

1981-06-04

1983-09-13

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315381, 358 60, 358220, H01J 2952

Patent

active

044045000

ABSTRACT:
In projection television apparatus in order to prevent burning of the phosphor screen of at least one of the television projection tubes a display is not produced should there be an interruption or substantial reduction in the deflection current through one of the line or field deflection coils. Each deflection coil is connected in series with sensing means for separately sensing the deflection current flowing therethrough. In the event of one of the currents through one of the deflection coils being interrupted or substantially reduced means responsive to said sensing means prevents picture information from being applied to the control grids of the projection tubes.

REFERENCES:
patent: 3090889 (1963-05-01), Levinson
patent: 3399324 (1968-08-01), Brown
patent: 3848945 (1974-11-01), Holzrichter
patent: 4187451 (1980-02-01), Boekhorst
patent: 4227122 (1980-10-01), Fujisawa et al.
patent: 4297619 (1981-10-01), Kiteley

Affiliated with

Also associated with

Rating

Projection television apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projection television apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection television apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1732239