SURFACE-TYPE ILLUMINATION DEVICE AND IMAGE DISPLAY DEVICE USING THE SAME

摘要

A surface-type illumination device is provided with a light source (1), a light guide plate (7) structured to enable the projection of light through its main surface portion, a plurality of first light deflecting region forming members (10) for transmitting a surface acoustic wave in a lateral direction region of a cover plate (13), and a plurality of second light deflecting region forming members (8) for transmitting the surface acoustic wave in a longitudinal direction region of a cover plate (13), so as to project illumination light (12) from an intersecting region where the lateral direction region to transmit the surface acoustic wave and the longitudinal direction region to transmit the surface acoustic wave intersect.