Cathode ray tube
AssigneeKoninklijke Philips Electronics N.V.
InventorsRonald Johannes Gelten, Heidrun Steinhauser, Berend Jan Willem Ter Weeme
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Abstract
A cathode ray tube includes a display for presenting an image, a deflection device, and an electron gun including electron-generating cathodes for generating electron beams. The CRT includes an electron beams controller for varying the trajectory of at least a first electron beam of the electron beams as a function of the intensity of at least the first electron beam, in order to compensate for changes in the convergence angle between electron beams near the display. The electrom beam controller is arranged between the electron-generating cathodes and the deflection device.
Claims20
A cathode ray tube comprising:
- a display for presenting an image,
- a deflection device, and
- an electron gun comprising electron-generating cathodes for generating electron beams,
- wherein the cathode ray tube includes electron beam controller means, positioned between the electron-generating cathodes and the deflection device, for compensating for changes in the convergence angle between electron beams near the display by varying the trajectory of at least a first electron beam of the electron beams as a function of the intensity of at least said first electron beam.
A cathode ray tube comprising:
- a display for presenting an image;
- a deflection device;
- and
- an electron gun comprising electron-generating cathodes for generating electron beams,
- wherein the cathode ray tube includes an electron beam controller, positioned between the electron-generating cathodes and the deflection device, for varying the trajectory of at least a first electron beam of the electron beams as a function of the intensity of at least said first electron beam, in order to compensate for changes in the convergence angle between electron beams near the display
- wherein the electron beam-redirecting device is an electrode that includes three-dimensional protrusions.
Dependencies are inferred from the claim text.