Cathode-ray tube having corrugated shadow mask with varying wave

Details Cathode-ray tube having corrugated shadow mask with varying wave Cathode-ray tube having corrugated shadow mask with varying wave

1978-05-11

1981-07-21

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313403, 313408, H01J 2907

Patent

active

042800773

ABSTRACT:
A shadow mask type of cathode-ray tube is improved by including a corrugated mask having a cross-section of varying waveform. In one embodiment, the amplitude of the corrugations is gradually decreased in the center-to-edge directions whereas in another emdodiment the peak-to-peak wavelength between corrugations is increased in the center-to-edge directions. The amplitude and wavelength variations can also be combined in mask construction to obtain the advantages of each.

REFERENCES:
patent: 3109117 (1963-10-01), Kaplan
patent: 3872345 (1975-03-01), Yamazaki et al.
patent: 3944867 (1976-03-01), Kaplan
patent: 4072876 (1978-02-01), Morrell
patent: 4122368 (1978-10-01), Masterson

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