Patent ID: 6054817
Filing Date: 2000-04-25
Classification: G09G,H04N

Abstract:
A display system comprising:an evacuated enclosure, at least part of that enclosure being transparent;a phosphor coated screen within the enclosure;means to rotate the screen within the enclosure so that the screen sweeps out a display volume;one or more electron guns within the enclosure positioned so that images may be written to the screen as it sweeps out the display volume; andcontrol means to provide drive signals to the one or more electron guns in accordance with the image information supplied thereto, wherein deflection coordinates defining the spatial location of the images are determined by transformation from a coordinate system based on the display volume to a coordinate system based on the one or more electron guns, the transformation determined by means of a matrix, the matrix comprising elements corresponding to:the horizontal component of a separation of the origins of the two coordinate systems;the vertical component of the separation;the angle of rotation of the one or more electron guns about the one or more electron guns own axis; andthe screen angle.