| 摘要 |
The device comprises at least one frame, a first group of infrared ray emitters and a second group of infrared ray emitters, said groups framing a touch interaction space, the scanning of this space being performed by the successive activations of the emitters of the first group then of the second group, wherein, for the first group of emitters and for the second group of emitters: each emitter is associated with a subgroup of receivers, the receivers of said subgroup being arranged facing said emitter; the scanning cycles are initiated according to set time periods, a scanning cycle comprising a complete scan of constant duration according to the first group of emitters and a complete scan of constant duration according to the second group of emitters; all of the emitted rays not received defining one or more shadow areas. |
