Automatic video convergence system

Details Automatic video convergence system Automatic video convergence system

G - Physics

09

G

375/46

G09G 1/28 (2006.01) H04N 9/28 (2006.01)

Patent

CA 2012377

An automatic convergence system for correcting misregistration of component colour images in a projection video display unit. The system comprises control circuitry for generating target characters onto a projection surface, and a locator assembly for aiming a photosensor array at the displayed target images by means of a pair of stepper motors. The photosensor array detects the position of the target images and conveys this information to a microprocessor which in response calculates appropriate correction signals for application to vertical and horizontal convergence coils of the display system for effecting convergence of the component colour images.

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