McClure, Qualey & Rodack, LLP
Input device with optical module for determining a relative position of an object thereon
An input device comprising an optical module having a light guide plate, a light source, a scattering layer and a sensor is provided. The light guide plate has a top surface, a bottom surface, and a side. The light source emits a light to the side. The light travels within the light guide plate. The scattering layer changes a path of parts of the light on the bottom surface so that the light is projected out of the top surface to form a penetrating light. When an object approaches or touches the top surface of the light guide plate, at least a part of the penetrating light is reflected by the object to form a reflected light received by the sensor. According to the reflected light, the input device generates a position signal indicating at least one relative position of the object with respect to the top surface.
PIXART IMAGING INC.
G G
G06F G06F
additional inventional
Ching-Lin Feng-Cheng Hsin-Chia Hui-Hsuan
Chung Yang Chen Chen