Apparatus and method for multi-touch optical touch panel ( multi-touch optical touch panel )

摘要

To be integrated into optical touch panel functions [challenge] of "multi-point" touch. And a first set of light emitting elements Multiple pairs configured SOLUTION: A rectangular position detection surface with a width W and length L, to emit light beams, the position detection plane in the vertical direction The arrangement consists of a pair at various points along the first side of, and a first set of light emitting elements more than one pair of second set of the plurality of light emitting elements, for the first side an arrangement to various points along the first side at 90 degrees Te, and reflectors are two arrangement along the side two opposite rectangular position detection surface of the W direction, the light-emitting element pairs is adapted to receive a plurality of light beams emitted by the first set, and a first set of light receiving elements multiple pairs, the second position detection surface facing the first side of the longitudinal at various points along the side, further comprising, arranged pair consists of, a first set of light receiving elements more than one pair of second set of a plurality of light receiving elements is the second set of light-emitting element to receive a plurality of light beams emitted by the arrangement comprises at various points along the second side at -90 degrees relative to the second side, multi-touch optical touch panel. The second set of a plurality of light emitting elements and the first set of light emitting elements a plurality of pairs, the control circuit is configured to emit light beams in a predetermined order to scan the position detection surface, further configured to receive a plurality of light beams in the second set of the plurality of light receiving elements and a first set of light receiving elements a plurality of pairs, so as to form an optical path in a grid pattern on the position detection surface thereby . [Selection Figure Figure 2