| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate of a side-light type surface light source preventing emission lines and brightness unevenness near the light source and uniformalizing intensity distribution of light after incidence into the light guide plate. <P>SOLUTION: The light guide plate is provided with a side face of a platy member having a polygonal shape and translucency as a light-incident face, and irradiates illumination light on an illumination object from its top face by changing optical paths of the light from the light source arranged in opposition to the light-incident face. In the plate, at least one corner part of the platy member is chamfered to make a side face formed by the chamfering a light-incident face, on which concavities and convexities consisting of a smoothly continuing curved surface are formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
