Color picture tube apparatus with pincushion distortion...

Details Color picture tube apparatus with pincushion distortion... Color picture tube apparatus with pincushion distortion...

2006-01-10

2006-01-10

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

C313S412000, C313S440000

Reexamination Certificate

active

06984929

ABSTRACT:
A color picture tube apparatus having a system for increasing an upper and lower pincushion distortion in the peripheral portion in the vertical direction by making the preliminary vertical deflection force when an electron beam is deflected toward the peripheral portion in the vertical direction of a phosphor screen relatively smaller than the preliminary vertical deflection force when an electron beam is deflected toward the middle portion in the vertical direction of the phosphor screen. With the color picture tube apparatus using an S-shaped distortion correction circuit, an upper and lower inner pincushion distortion can be optimized while correcting the upper and lower pincushion distortion.

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Copy of the Chinese Office Action.

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