Patent ID: 6046711
Filing Date: 2000-04-04
Classification: G09G,H04N

Abstract:
A binocular head mount display device comprising:a mounted pair of matrix display panels;an optical assembly arranged relative to said mounted pair of matrix display panels so that image areas of respective display panels are viewable by the left eye and the right eye of a viewer; anda drive circuit for driving each of said matrix display panels to display a respective left-eye display image and a right-eye display image thereon,wherein:said optical assembly is arranged, so that in the field of view of the viewer, the image area of the display panel viewable by the left eye of the viewer, and the image area of the display panel viewable by the right eye of the viewer, are viewable as having a common area where parts of each image area are superimposed; andsaid drive circuit includes selecting means for selecting different start columns for display of each display image on the respective image areas of said display panels, to position the display images relative to said image areas of the display panels according to viewing mode, which viewing mode is changeable between the following modes: a full stereoscopic viewing mode in which the display images are viewable in said common area; a partial stereoscopic viewing mode in which a right portion of the display image, viewable by the left eye, and a left portion of the display image, viewable by the right eye, are viewable as a stereoscopic image portion at the center of the field of view of the viewer, and the peripheral left portion of the display image, viewable by the left eye, and the peripheral right portion of the display image, viewable by the right eye, are viewable as non-stereoscopic image portions to the left and right of the center stereoscopic image portion of the field of view; and a wide-angle viewing mode in which the display images are viewable in abutment, wherein said drive circuit comprises, for each matrix display panel:a signal line for supplying a video signal; anda plurality of switches each connected between said signal line and either a respective one of columns of the respective display panel or a respective one of an array of latched amplifiers connected to a respective one of said columns, andwherein said selecting means includes:a shift register for supplying a shift pulse sequentially to said switches connected to said columns or amplifiers;a selection circuit, cooperative with said shift register, responsive to a column start position control signal, to determine the start position of the shift pulse applied sequentially to said switches by said shift register; anda control signal generator for supplying said column start position control signal to control the start position of said shift pulse so that it is applied to a switch corresponding to an appropriate column start position for a given viewing mode.