MULTI-GRADATION MONOCHROMATIC IMAGE DISPLAY METHOD, MULTI-GRADATION MONOCHROMATIC IMAGE DISPLAY DEVICE COMPUTER, MONOCHROMATIC DISPLAY DEVICE, RE-CONVERSION ADAPTER, AND VIDEO CARD

摘要

A monochromatic image having the number of gradations (for example, 1024) greater than the monochromatic image (for example, 256) which can be handled in an OS (13) is converted into a color image which is passed to the OS (13). The image can be output directly because the number of colors is within the number of colors (for example, 16,777,216) which can be handled by the OS (13). Next, the color image passed from the OS (13) is re-converted into a monochromatic image having a number of gradations (for example, 1021 or 1024) greater than the number of gradations (for example, 256) of the monochromatic image which can be handled by the OS (13). Thus, it is possible to display a multi-gradation monochromatic image exceeding the limit of the conventional OS without drastically modifying the hardware or software.