Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1990-07-02
1991-07-09
Yusko, Donald J.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313408, H01J 2907
Patent
active
050308815
ABSTRACT:
An improved color picture tube includes a mask that has an aperture array including slit-shaped apertures aligned in columns that essentially parallel the minor axis and end at a border of the aperture array. Adjacent apertures in each column are separated by tie bars in the mask. The tie bars in one column are offset in the longitudinal direction, paralleling the minor axis, from the tie bars in each adjacent column. The spacing between tie bars in a column is the tie bar pitch at a location on the mask. A first set of columns, that includes every other column, has increased tie bar pitch at the ultimate end apertures, as compared to the tie bar pitch at the penultimate apertures in each of the columns. In a second set of columns, every other column not in the first set, has decreased tie bar pitch at the ultimate end apertures, as compared to the tie bar pitch at the penultimate apertures in each of the columns. The last tie bars before the ends of the aperture columns in the second set are shorter than the next to the last tie bars, measured in the longitudinal direction of the columns, and the ultimate apertures at the ends of all of the aperture columns end on a smooth border line.
REFERENCES:
patent: 4227115 (1980-10-01), Eishof et al.
patent: 4293791 (1981-10-01), D'Amato
patent: 4300070 (1981-11-01), Godfrey et al.
Marks Bruce G.
Welles, Jr. Thomas D.
Irlbeck Dennis H.
Patel Ashok
RCA Licensing Corporation
Tripoli Joseph S.
Yusko Donald J.
LandOfFree
Color picture tube with shadow mask having improved aperture bor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color picture tube with shadow mask having improved aperture bor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color picture tube with shadow mask having improved aperture bor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-620331