Patent ID: 6583814
Filing Date: 2003-06-24
Classification: H04N

Abstract:
An image signal generator for an alignment grid indicating convergence of a color image display and position cursor on said alignment grid, said image signal generator comprising:a raster generator providing a scanned raster for a color image display; a grid generator for providing a grid signal corresponding to an alignment grid synchronized with said scanned raster and having intersections indicative of display locations for a manual adjustment of convergence; a cursor generator for providing a cursor signal synchronized with said grid signal and indicative of where on said alignment grid said position cursor is to be visible, said cursor signal interrupting said grid signal at a cursor position, wherein said cursor signal interrupting said grid signal results in an absence of display of portions of said alignment grid coinciding with said position cursor, and means for combining said grid signal and said cursor signal so as to inhibit said grid signal corresponding to where on said alignment grid said position cursor is to be visible by an absence of display of portions of said alignment grid and providing an image signal output, said means for combining including a gate controlled by said cursor signal for coupling said grid signal to an input of a display device when said grid signal does not coincide with said cursor signal indicative of said position cursor, when said cursor signal is indicative of said position cursor said gate circuit inhibiting said grid signal and providing to an input of said display device said image signal output.