| 摘要 |
PURPOSE:To execute coordinate reading with high accuracy even if information to be read is given from an upper part by projection or the like by making a part in matching with a coordinate position indexing point of a cursor to emit light. CONSTITUTION:A cylindrical concave part 13 is provided at the center of a frame 12 and a light emitting diode 14 is fitted to the bottom. A projecting plate 19 made of a colored resin such as white acryl is fitted to the upper part of the frame 12, a cross line 22 whose center is a cross point is provided to the projecting plate 19, and the cross point of the cross lines 22 is pierced with a minute circular hole 23 to lead the light of the light emitting diode 14 externally. The projecting plate 19 is the state as a rectangular frame so as to bridge over the cross line 22, and this cut section 24 constitutes a transparent section 25 through which the cross line 10 of the cursor 2 is made transparent from the upper face side. |
