Electric lamp and discharge devices – Cathode ray tube – Envelope
Reexamination Certificate
2007-07-31
2007-07-31
Patel, Ashok (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Envelope
C220S00210A
Reexamination Certificate
active
11159438
ABSTRACT:
A cathode ray tube includes a panel with inner and outer surfaces, a funnel connected to the panel, a neck connected to the rear of the funnel, and a shadow mask mounted within the panel. The inner surface of the panel satisfies the following condition:in-line-formulae description="In-line Formulae" end="lead"?0.2≦Px≦0.4, 0.3≦Py≦0.6in-line-formulae description="In-line Formulae" end="tail"?where when the inner surface of the panel is expressed by the following biquadratic:z(x,y)=∑i,j=0,2,4Ai,jxiyj,based on the central point of the inner surface of the panel with the three-dimensional orthogonal coordinates system defined by the x, y and z axes, Px and Py are defined by the following formula:Px=A20A20+A40,Py=A02A02+A04
REFERENCES:
patent: 6774553 (2004-08-01), Pyun et al.
patent: 7005792 (2006-02-01), Baek et al.
patent: 7084561 (2006-08-01), Lee et al.
Bae Joon-Soo
Choi Yeun-Gil
Jeong Soon-Dong
Ji Sung-Hun
Pyun Do-Hun
Christie Parker & Hale LLP
Patel Ashok
Samsung SDI & Co., Ltd.
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