DATA PROCESSOR WITH DISPLAY CONTENTS CONCEALING FUNCTION

摘要

PURPOSE:To provide the function which can conceals display contents from a 3rd person by displaying a background in two colors changing to close color vision and characters and a graphic in a display color changing into a color close to the background color at a fine visual angle and viewing the display contents through a filter. CONSTITUTION:A shift limit pixel number counting part 2 counts the size of a shift limit pixel block of the same color according to the resolution of a display part 1 and a visual angle where a color sensation shift is caused. A background display control part 3 controls a memory 5 so as to display two colors C1 and C2 with which the background part shifts to visually close color sensation by the shift limit number of pixels. A character and graphic display control part 4 displays the characters and graphics in the display color C3 shifting to color sensation visually close to the C1 and C2. Further, when the size of the pixel block of the C3 exceeds a shift limit pixel block, the memory 5 is so controlled as to replace pixels adjacent to the change limit pixel among the pixels of C3 with C1 or C2. The filter suppress transmissivity within the range of wavelength longer than the C1 and C2 and shorter than the C3.