Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Reexamination Certificate
2007-06-05
2007-06-05
Patel, Ashok (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
C313S402000
Reexamination Certificate
active
11038609
ABSTRACT:
A shadow mask structure is held on a panel via a support member in which a base member and a spring member are connected to each other in a substantially V-shape. The spring member includes a connecting portion connected to the base member, an engagement portion having an engagement hole in which a stud pin is fitted, and an elastic portion between the connecting portion and the engagement portion, tilted with respect to the base member and mainly having a spring function. Assuming that a width of an end of the elastic portion on the connecting portion side is A, a width of an end of the elastic portion on the engagement portion side is B, a width of a narrowest part of the elastic portion in a region including both the ends is C, and a minimum value of an effective width of the elastic portion in the region including both the ends is C′, relationships: A>C and B>C, and 0.40<C′/A<0.55 are satisfied. Because of this, the plastic deformation of the spring member under the application of an external impact thereto can be reduced, so that color displacement on a screen attributable to mislanding can be reduced.
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Hamre Schumann Mueller & Larson P.C.
Matsushita Toshiba Picture Display Co., Ltd.
Patel Ashok
Raabe Christopher M.
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