Patent ID: 6100926
Filing Date: 2000-08-08
Classification: H04N

Abstract:
Apparatus for performing convergence calibration in a video system using multiple beams directed at a screen, comprising:at least one sensor for receiving abeam and for converting the received beam to a signal, said at least one sensor having at least first and second portions of a sensitive surface exposed to the received beam;a programmable controller for generating on said screen a first test pattern overlapping said first portion, and for generating on said screen a second test pattern overlapping said second portion, said at least one sensor producing a first output signal in response to the gene rated first test pattern and producing a second output signal in response to the generated second test pattern; andan integrator circuit for integrating said first and second output signals received from said at least one sensor such that said programmable controller is operative to determine alignment of the beams based on the integrated first and second output signals received from said integrator circuit.