| 摘要 |
PROBLEM TO BE SOLVED: To reduce the energy of portable electronic equipment and to improve the display visibility by arranging a transmission type lighting body below a lower substrate and a light absorption part below the transmission type lighting body. SOLUTION: The luminous flux emitted by a light emission source 7 constituting the transmission type lighting body is guided in a light guide plate 6 constituting the transmission type lighting body and totally reflected again and again, and the guided light 14 when reaching a flank part of a columnar projection is emitted there out of the light guide plate 6; and the light when reaching an area (light scatter part) 15 where no voltage is applied becomes omnidirectional scattered light 13, but the rate of light which is scattered upward is large, so that the area 15 presents a light white display which is turbid in white for a locking-down observer. At this time, scattered light of external light 10 is also added. Emitted light 12 having reached a voltage applied area (transparent part) 16, on the other hand, is not scattered in the area 15 and emitted obliquely upward as it is. The looking-down observer, therefore, observes the area 16 in the color of the light absorption part 9 i.e., in black. |
