Patent ID: 9733765
Date: 2017-08-15
CPC Classifications: G06F

Claim:
1. A display apparatus comprising: a curved display module having a curved surface bent in a y-axis direction; a surface overlay disposed on a front surface of the curved display module and having a refractive index differing from an air layer; at least one infrared (IR) emitter arranged on an upper long side or a lower long side of the surface overlay and emitting first light of IR light toward the air layer and second light of the IR light toward the surface overlay; at least one first IR receiver arranged on the long side such that the at least one first IR receiver is located at an opposite side of the at least one IR emitter, the at least one first IR receiver receiving the first light through the air layer; and second IR receivers arranged in pairs such that one of the pairs is located on the upper long side and the other one of the pairs is located on the lower long side of the surface overlay, the second IR receivers receiving the second light through the surface overlay, wherein an x-axis coordinate of a touch position on the surface overly is calculated based on a change of a quantity of light received by the at least one first IR receiver, and wherein a y-axis coordinate of the touch position is calculated based on a change of a quantity of light received by the second IR receivers.