Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1996-01-26
1997-11-25
Patel, Ashok
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313408, 313407, 313477R, 313482, H01J 2986, H01J 3120
Patent
active
056915977
ABSTRACT:
A shadow mask is arranged in an envelope and opposes a phosphor screen formed on an inner surface of a face plate. The shadow mask includes a plurality of mask pieces arranged in series. Each of the mask pieces has effective portions in which a number of electron beam passage apertures are formed. A plurality of mask frames supporting the respective mask pieces are fixed to the inner surface of the face plate. A plurality of stages are provided on the inner surface of the face plate. Each of the stages has a first end in contact with the inner surface of the face plate and a second end in contact with one of the mask piece, so as to define a distance between each of the mask pieces and the phosphor screen and to apply a tensile force to the mask piece.
REFERENCES:
patent: 4259612 (1981-03-01), Christiano et al.
patent: 4714856 (1987-12-01), Takenaka et al.
patent: 4994704 (1991-02-01), Takenaka et al.
patent: 5032756 (1991-07-01), Takenaka et al.
patent: 5287034 (1994-02-01), Kamohara et al.
patent: 5365142 (1994-11-01), Nishimura et al.
patent: 5365143 (1994-11-01), Nishimura et al.
patent: 5506467 (1996-04-01), Nishimura et al.
Nishimura Takashi
Takahashi Toru
Kabushiki Kaisha Toshiba
Patel Ashok
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