| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide sheet capable of attaining the desired uniformity of the luminance of the whole light-emitting surface compared with a conventional one in which the uniformity of luminance, especially in a width (lateral) direction, is not attained, a sheet with a contact spring, and a switch device using the sheet with the contact spring.SOLUTION: A light guide sheet has a holding sheet 24 for holding a movable contact 25 and a flexible light guide sheet 21 which is arranged at an upper face side of the holding sheet 24 and guides light from a light source LG. The light guide sheet 21 has a light-incident part 21i which light from the light source LG enters and a light-emitting part 21h from which the light guided from the light-incident part 21i is emitted. Furthermore, the sheet has a luminance adjusting part 23 which is formed in a thickness direction of the light guide sheet 21 in the vicinity of the light-incident part 21i between the light-incident part 21i and the light-emitting part 21h. |
