| 摘要 |
PURPOSE:To make easily legible the item of a screen sheet to any projection from an external part by forming the screen sheet by a transparent or translucent member, and providing a light source for illumination to illuminate the screen sheet beneath the screen sheet. CONSTITUTION:A reflecting light 16, which can be generated by reflecting the projection from the external part on the surface of a touch switch plate 4 as a multi-item input switch, comes to the interruption when an operator reads the displaying on a screen sheet 1. On the other hand, the light from a light source 11 for illumination to light up transmits the part where the displaying character, etc., of a transparent sheet guide 14 and the screen sheet 1 are not written, further, transmits the touch switch plate 4 as a multi-item input switch and arrives at the operator. A transmitting light 17 cancells the reflecting light 16 and the character written on the screen sheet 1 is embossed. Thus, the operator is easily legible the screen sheet 1 and the erroneous input can be minimized to recognize easily the sheet.
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