| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface light emitting device excellent in design where intensity is made approximately uniform on the surface of a light guide plate with a simple constitution, and a light source and an electric wiring member to supply electrical power to the light source do not protrude from the light guide plate and become flush with the light guide plate. SOLUTION: An angleαthat an incident end face in the light guide plate 50 makes with the surface of the light guide plate 50 is an acute angle, an acute angle end face 53 is installed in contact with a second light guide plate 51, and an angleβthat a lamp light 52 traveling toward the center of the acute angle end face 53 in a thickness direction makes with the acute angle end face 53 is approximately a right angle. An angle 56 that light 14 toward the surface makes with the normal at the point where the light intersects the surface of the first light guide plate 50 is larger than the critical angle for total reflection in the light guide plate 50. A slim fluorescent lamp 55 and a lamp socket 57 both are arranged below the surface of the light guide plate 50. COPYRIGHT: (C)2005,JPO&NCIPI |
