| 摘要 |
<p>The present invention relates to a stabilizer of an optical touch sensing device, which improves the location error rate depending on a change in the axis of an optical head and a motor when recognizing a location corresponding to an indication that a finger, an indicating rod, etc. indicate a predetermined point on an optical touchscreen. The stabilizer of an optical touch sensing device includes a pair of object sensing units and a reflecting unit. The object sensing units are positioned on the top of the touchscreen to radiate a laser beam toward the reflecting unit, and detect the location coordinates of an indicating object on the plane of the touchscreen by analyzing a change in the intensity of the laser beam retroreflected from the reflecting unit depending on time. The reflecting unit is provided along the left, right and lower edges of the touchscreen to retroreflect the laser beam radiated from the object sensing units. The object sensing unit includes a cylindrical lens for expanding the width of the laser beam reaching the reflecting unit.</p> |
