Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Reexamination Certificate
2006-02-28
2006-02-28
Dinh, Trinh Vo (Department: 2821)
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
C315S005370, C313S414000
Reexamination Certificate
active
07005801
ABSTRACT:
A projection type cathode ray tube includes a phosphor screen, a cathode, G1, G2 and a main lens composed of first, second and third electrodes. The first and third electrodes are supplied with an anode voltage of the phosphor screen, and the second electrode is supplied with a focus voltage lower than the anode voltage. An inside diameter of an opening in a phosphor screen side end of the second electrode is from 14 mm to 18 mm, and the phosphor screen side end of the second electrode is disposed within the third electrode. An aperture diameter D mm in the G1 electrode and an axial length L mm of the second electrode satisfy the following inequalities: L mm≧60×D mm+27.6 mm, L mm≦−646×D mm+396.3 mm, D mm≧0.44 mm, and L mm≦75 mm.
REFERENCES:
patent: 6445116 (2002-09-01), Uchida et al.
patent: 6492766 (2002-12-01), Tsuzurahara et al.
patent: 6624562 (2003-09-01), Uchida et al.
patent: 2004/0041511 (2004-03-01), Uchida et al.
R. Long et al.; “A 16-cm Dual Neck Diameter, Integrated Component Projection CRT”; The Journal of the Institute of Image Information and Television Engineers; 2003; pp. 983-988 vol. 57 No. 8.
T. Komiya, et al.; Barium-Scandate Dispersed Oxide Cathode for CRT with High Bean Current Density; pp. 631-634; IDW '02; CRT5-2.
Dinh Trinh Vo
Hitachi Display, Ltd.
Milbank Tweed Hadley & McCloy LLP
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