Title:
SINGLE BEAM TRACKING TUBE
Document Type and Number:
WIPO Patent Application WO2002049060
Kind Code:
A3
Abstract:
Single beam color CRT of the beam tracking type having a display screen comprising a plurality of parallel phosphor lines, the CRT being equipped with a Distributed Main Lens type electron gun. The distributed main lens has a plurality of oblong grids which each have a single, oblong, beam passing aperture. The longitudinal axes of the grids and of the apertures are transverse to the direction of the phosphor lines. Correction means are provided to compensate for the astigmatism introduced by the main lens.
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Inventors:
KRIJN MARCELLINUS P C M
WILLEMSEN OSCAR H
VAN DER VAART NIJS C
WILLEMSEN OSCAR H
VAN DER VAART NIJS C
Application Number:
PCT/EP2001/014146
Publication Date:
September 12, 2002
Filing Date:
November 27, 2001
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
International Classes:
H01J31/20; H01J29/48; (IPC1-7): H01J29/56; H01J29/48
Foreign References:
| US4322655A | 1982-03-30 | |||
| US3866081A | 1975-02-11 | |||
| GB1352217A | 1974-05-08 | |||
| US4300157A | 1981-11-10 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26)
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