System for correcting the geometry of the image resulting from the assembling of the deflection yoke on a cathode rays kinescope.

摘要

For the correction of the geometry and the distortions of the image obtained by a deflection yoke when associated with a kinescope to be steadily assembled to a yoke or to a reference kinescope, the following steps are provided: (1) generating a signal for the reference image, by a programmable signal generator; (2) displaying a distorted image on the kinescope/yoke under test; (3) reading the image through a solid-state television camera; (4) converting the analogic signal of the telecamera into a digital signal to make it utilizable by the processor; (5) storing the signal in a RAM type memory to keep it available during the processing; (6) processing and comparison in real time of the data relative to the distorted image with a reference or sample image on the basis of comparison-algorithms specifically studied for the various parameters coming from (12); (7) comparing the data with the tolerances; going on with the correction if necessary, otherwise performing the next step to begin the correction of another type of distortion; (8) calculating the correction necessary for that parameter through the proper correcting algorithm supplied by 8A; (9) performing the correction which must reduce the distortion of the displayed image, automatically obtained at(9A)(through the path 10) on (2), or by a guidance for the operator obtained at (9B) for a manual introduction according to (11).