Patent ID: 7063450
Filing Date: 2006-06-20
Classification: G02B

Abstract:
1. A surface light emitting device comprising; a light guide plate having a top surface for emitting a light and an under surface that opposes said top surface, a reflector on the under surface of said light guide plate and, an LED light source having at least one LED element covered with a light transmitting resin having a phosphor and disposed so that light emitted by the LED element is incident on at least one end face of said light guide plate, said LED element emitting first visible light and said phosphor emitting second visible light having a wavelength longer than said first visible light absorbed, said LED light source emitting light mixed said first visible light and said second visible light, wherein said light guide plate has a light diffusing portion having a center notch and the other notches on said end face, said other notches tilting to outside, wherein the tilt angles of said other notches increase as a distance from the center notch increases.