CRT display device comprising a filter in the cathode modulator

Details CRT display device comprising a filter in the cathode modulator CRT display device comprising a filter in the cathode modulator

1995-12-22

1998-01-27

Pascal, Robert

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 131, 348809, 348563, H01J 2950

Patent

active

057125384

ABSTRACT:
A phosphor screen in a display device is scanned by separate electron beams in order to generate images of different frequency content in one color in substantially the same part of the phosphor screen. The different images can be perceived as a composite image for some time. The individual electron beams can be modulated by means of a cathode modulator on the basis of a high frequency and a low frequency component of an electronic image signal or on the basis of an image component and a text component of an electronic image signal. The modulations of the individual electron beams may be slightly delayed relative to one another in order to avoid overloading of the phosphor material.

REFERENCES:
patent: 4418359 (1983-11-01), Stapleton
patent: 4855650 (1989-08-01), Seigneur et al.
patent: 4954901 (1990-09-01), Okada et al.
patent: 5389855 (1995-02-01), Chen
patent: 5418576 (1995-05-01), Ross

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