Patent ID: 7223006
Filing Date: 2007-05-29
Classification: G02B

Abstract:
1. A surface-emitting device comprising: a light source; and a light-guiding plate for receiving light from the light source through an end surface and emitting the light that has traveled through the light-guiding plate from a first surface; wherein the end surface of the light-guiding plate for guiding light is a light-entering surface and a plurality of prismatic grooves are formed on a second surface of the light-guiding plate, the prismatic grooves being arranged in a striped pattern when viewed from above, the light source comprises an intermediate light-guiding body disposed along the light-entering surface of the light-guiding plate and light-emitting elements disposed at both longitudinal ends of the intermediate light-guiding body, a side surface of the intermediate light-guiding body disposed adjacent to the light-entering surface of the light-guiding plate is a light-emitting surface for emitting light from the light-emitting elements to the light-guiding plate and a side surface of the intermediate light-guiding body disposed opposite to the light-emitting surface is a reflective surface for reflecting the light that has traveled through the intermediate light-guiding body, and a total length of the intermediate light-guiding body and the light-emitting elements disposed on both ends of the intermediate light-guiding body is the same as a width of the light-guiding plate a length of at least the light-emitting surface of the intermediate light-guiding body is the same as the width of the light-guiding plate and a length of the reflective surface is smaller than the length of the light-emitting surface.