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US 6,633,141 B1Granted
Display device with deflection means and means for influencing the distance between electron beams
AssigneeKoninklijke Philips Electronics N.V.
InventorWillibrordus Jurrianus Dijkman
Life of this patent
Estimating the term…
Abstract
A cathode ray tube display having an in-line tube includes an electromagnetic unit for dynamically influencing the path or shape of the electron beams. The power for supplying current to the electromagnetic unit is drawn from the line deflection circuit, either through supply coil on a transformer arranged in parallel with the line deflection coil, or from a supply coil sound around the deflection unit core.
Claims17
A display device comprising:
- a cathode ray tube having an electron gun for generating an electron beam, a phosphor screen on an inner surface of a display window, deflection means including a line deflection coil for deflecting the electron beam, and electromagnetic means for generating a magnetic field to dynamically influence the path or shape of the electron beam as a function of a position where the electron beam hits the phosphor screen,
- means for supplying line deflection current to said line deflection coil, and
- means for supplying a current to said electromagnetic means,
- characterized in that said means for supplying a current receives power solely from said means for supplying line deflection current, and comprises a supply coil coupled to said deflection means and arranged to have a voltage induced therein proportional to a voltage across the line deflection coil.
1 more element
A display device comprising:
- a cathode ray tube having an electron gun for generating an electron beam, a phosphor screen on an inner surface of a display window, deflection means including a line deflection coil for deflecting the electron beam, and electromagnetic means for generating a magnetic field to dynamically influence the path of the electron beam as a function of a position where the electron beam hits the phosphor screen,
- means for supplying line deflection current to said line deflection coil, and
- means for supplying a current to said electromagnetic means,
- characterized in that said means for supplying a current comprises a supply coil coupled to said deflection means, said supply coil receiving power solely from said means for supplying line deflection current, and said supply coil being arranged to have a voltage induced therein proportional to a voltage across the line deflection coil, and
- said electromagnetic means generates a magnetic field transverse to said electron beam.
2 more elements
Dependencies are inferred from the claim text.