PURPOSE: To watch the input display without moving the line of sight and the eye focus much from the keyboard by displaying the image of the entire display of the picture display device like being displayed on the keyboard by the diffraction effect of the hologram board.
CONSTITUTION: A spindle 4 is constructed to rotate freely for a keyboard 1, adjusting the position of a hologram board 3. The hologram board 3 is constructed to rotate freely to the spindle 4, adjusting the angle of the hologram board 3. A character inputted from the keyboard 1 is displayed on a picture display 2, and the picture looks like being displayed on the keyboard 1 by the diffraction effect of the hologram board 3. When a character is newly inputted and the image displayed on the picture display device 2 is changed, the picture on the picture display device 2 displayed on the keyboard 1 is also changed. Thus, the fatigue of the eye can be prevented to a certain extent and the efficiency of operating the keyboard 1 is improved.
SAKAI KOJI
KOIKE TOMOYUKI
OMI TOSHIHIKO
YABE MAMORU
