Touch control apparatus and associated selection method

摘要

A touch control apparatus includes a first light source, a first sensor, a second light source, a second sensor and a controller. A selection method for the touch control apparatus includes steps of: driving the first light to generate a first initial structured light; sensing a first reflected light distribution by the first sensor; driving the second light source to generate a second initial structured light; sensing a second reflected light by the second sensor; and, from multiple candidate touch positions, selecting positions corresponding to at least two touch points according to a first left reflected structured light, a second left reflected structured light, a first right reflected structured light and a second right reflected structured light.

主权项

1. A touch control apparatus, for selecting touch points corresponding to at least two objects from a plurality of candidate touch positions, the touch control apparatus comprising:
a display panel; a first light source, located at a left side of the display panel, for generating a first initial structured light comprising a plurality of first initial bright lines and a plurality of first initial dark lines, wherein the first initial structured light is reflected by the at least two objects to form a first reflected light distribution; a first sensor, for sensing a first left reflected structured light and a second left reflected structured light in the first reflected light distribution, wherein the first left reflected structured light and the second left reflected structured light respectively comprise a plurality of alternating reflected bright lines and reflected dark lines; a second light source, located at a right side of the display panel, for generating a second initial structured light comprising a plurality of second initial bright lines and a plurality of second initial dark lines, wherein the second initial structured light is reflected by the at least two objects to form a second reflected light distribution; a second sensor, for sensing a first right reflected structured light and a second right reflected structured light in the second reflected light distribution, wherein the first right reflected structured light and the second right reflected structured light respectively comprise a plurality of alternating reflected bright lines and reflected dark lines; and a controller, electrically coupled to the first sensor and the second sensor, for selecting the touch points corresponding to the at least two objects from the plurality of candidate touch positions according to at least one of a first comparison result and a second comparison result, wherein the first comparison result is generated based on comparing a width of the reflected bright lines of the first left reflected structured light and a width of the reflected bright lines of the second left reflected structured light; and comparing a width of the reflected bright lines of the first right reflected structured light and a width of the reflected bright lines of the second right reflected structured light; and the second comparison result is generated based on comparing a width of the reflected dark lines of the first left reflected structured light and a width of the reflected dark lines of the second left reflected structured light; and comparing a width of the reflected dark lines of the first right reflected structured light and a width of the reflected dark lines of the second right reflected structured light.