| 摘要 |
A sheet-switch module includes a substrate; a plurality of switches formed on the substrate; a light guiding sheet disposed above the plurality of switches and having a plurality of protruding portions formed on a surface thereof facing each of the switches, each of the protruding portions being disposed to face a respective switch; and a light source disposed at one end of the substrate and causing light to enter the light guiding sheet, at least one of the plurality of protruding portions of the light guiding sheet having a light-shielding portion at a position of location of the at least one of the plurality of protruding portions. The light-shielding portion is configured by a light-shielding portion provided at least one of a peripheral surface and a peripheral edge of the protruding portions on an opposite side to a surface close to and facing the light source, or is configured by a light-shielding portion provided at a contact portion of the protruding portions and the switches.
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