| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide capable of irradiating uniformly a slender irradiation face, and capable of reducing the number of light sources. <P>SOLUTION: The synthetic resin light guide 1 is constituted to guide a light incident from the light source 3 radially in a plane part 1a in parallel to an operation panel front face, to reflect the light on an outer face 1c of a connection part between the plane part 1a and a vertical thin sheet part 1b, and to emit the light from a tip face extended linearly with a narrow width of the thin sheet part 1b in parallel to the operation panel front face, and an tilt angle to an underface of the plane part of the outer face 1c of the connection part is made to get near to 45° from an angle smaller than 45°, from a place nearest to the light source 3 toward a place most distant thereto. <P>COPYRIGHT: (C)2009,JPO&INPIT |
