Shadow mask for cathode ray tube

Details Shadow mask for cathode ray tube Shadow mask for cathode ray tube

2006-08-29

2006-08-29

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

Reexamination Certificate

active

07098583

ABSTRACT:
A slot tension-type shadow mask for the cathode-ray tube (CRT) has slots. Each slot has two openings and a pseudo-bridge between the two opening of the slot. The slots are formed in the X-Y plane that is formed away from the electron gun in the Z-axis. Each pseudo bridge has a pair of protuberances separated by a lacuna. The edges of each protuberance is etched to have various surface profiles in the X, Y, Z directions and/or the shape of the lacuna is also varied to provide effective shielding while overcoming various problems associated with heating and image imperfections appearing on the CRT screen.

REFERENCES:
patent: 4864188 (1989-09-01), Sugai et al.
patent: 6437496 (2002-08-01), Kim et al.
patent: 2-78134 (1990-03-01), None
patent: 0123753 (2000-04-01), None
patent: 0043808 (2001-02-01), None
patent: 0084918 (2001-03-01), None
patent: 0185048 (2001-07-01), None
patent: 0312976 (2001-11-01), None

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