|
(11) | EP 0 219 467 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|||||||||||||||
| (54) | System for correcting the geometry of the image resulting from the assembling of the deflection yoke on a cathode rays kinescope |
| (57) 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). |