Patent ID: 7618146
Filing Date: 2009-11-17
Classification: G03B,H04N

Abstract:
1. A multiscreen display system, comprising: a plurality of projectors for displaying on a screen a single large image in which a plurality of images have been combined; and a luminance correction circuit for, in areas of overlap of said plurality of images that are projected on the screen, implementing a non-linear arrangement of gain coefficients for gradation control that is carried out in picture element units in gradation correction areas, said luminance correction circuit comprising a gradation conversion look up table (LUT) unit for adjusting display positions based on display position information from a timing circuit such that areas in which projection display areas of said plurality of projectors overlap match with areas that are an object of gradation conversion, and then implementing, in picture element units, a luminance level conversion of input signal levels of a plurality of picture signals that have been split using the non-linear arrangement of said gain coefficients for gradation control.