Color-picture tube with an arrangement to compensate for misregi

Details Color-picture tube with an arrangement to compensate for misregi Color-picture tube with an arrangement to compensate for misregi

1980-01-25

1982-06-01

Dixon, Harold A.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

313408, 315309, H01J 2316, H01J 2980

Patent

active

043330371

ABSTRACT:
In a color TV tube employing a shadow mask (4), this mask is heated during operation of the tube, and expands, thus causing impact misregistry errors of the electron beams (5) on the phosphor layer (2) of the tube. These misregistry errors are corrected according to the invention with the aid of temperature-dependent accelerating or decelerating fields between the mask (4) and a metal layer (3) deposited on to the phosphor layer (2). Temperature dependance of the fields is obtained by inserting temperature-dependent (PTC and NTC) resistors between the mask and the metal layer.

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