Patent ID: 8858059
Filing Date: 2014-10-14
Classification: C22C,G02B,G09F,H04M

Abstract:
1. A surface illumination device comprising: a light source; and a light guide plate having a light-emitting surface, wherein the light guide plate guides light from the light source such that the light is emitted from a display region of the light-emitting surface, wherein a plurality of first deflection patterns having deflection inclined surfaces and a plurality of second deflection patterns having deflection inclined surfaces are formed in the display region in at least one of the light-emitting surface of the light guide plate and an opposite surface to the light-emitting surface, wherein, when viewed from a direction perpendicular to the light-emitting surface of the light guide plate, the first deflection pattern is disposed such that an angle formed by a line normal to the deflection inclined surface and a direction connecting the light source and the first deflection pattern is less than or equal to 30°, wherein, when viewed from a direction perpendicular to the light-emitting surface of the light guide plate, the second deflection pattern is disposed such that an angle formed by a line normal to the deflection inclined surface and a direction connecting the light source and the second deflection pattern is less than or equal to 25°, and wherein, when viewed from a direction perpendicular to the light-emitting surface of the light guide plate, part of the light emitted from the light source is reflected on a side surface side of the light guide plate to reach the second deflection pattern.