Patent ID: 8384010

Claim:
A touch sensing apparatus comprising: at least one light source generating light; a light distribution part in which the light from the light source is distributed; a light guide part, including a light reflection part, that guides the light from the light source to the light distribution part by reflecting the light; a light sensing part that faces the light guide part receiving the light provided through the light guide part and the light distribution part from the light source, and outputting an output signal corresponding to a degree to which an intensity of the received light varies along the light sensing part as a result of a first touch occurring in the light distribution part; and a coordinate generating part that calculates a coordinate value of the first touch based on the output signal from the light sensing part, wherein the coordinate generating part calculates an X-axis coordinate value of the first touch as a center value of a plurality of light sensing devices arranged along a longitudinal direction of the light guide part exhibiting a variation of output values and calculates a Y-axis coordinate value of the first touch from a number of light sensing devices of the plurality of light sensing devices exhibiting a variation of output value.