| 摘要 |
PROBLEM TO BE SOLVED: To provide a touch panel device for a game machine which is capable of reducing the number of light sources as far as possible, saving power consumption, and eliminating the phenomenon of generating a time lag in timing of light projection and light reception between light emitting and light receiving elements. SOLUTION: In the touch panel device 14, at first and second light projection parts 62A and 63A, half mirrors 42a<SB>1</SB>-42a<SB>13</SB>for branching projected light (be) from an infrared light emitting diode 39 to a first light receiving part 62B and half mirrors 42b<SB>1</SB>-42b<SB>3</SB>for branching it to a second light receiving part 63B are arranged, respectively. Thus, the projected light from the infrared light emitting diode is formed into a plurality of projected light beams by being separated in the order by the plurality of half mirrors and is received by a plurality of infrared light receiving transistors of the corresponding light receiving part. Thus, the number of light sources is reduced, the power consumption is saved, and the time lag between detection parts is eliminated. COPYRIGHT: (C)2010,JPO&INPIT
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