Patent ID: 9052778
Filing Date: 2015-06-09
Classification: G06F

Abstract:
1. An infrared touch screen, comprising: a touch detecting region; a plurality of edges including at least a first edge and a second edge, wherein said first edge and said second edge are opposite to each other, said first edge having infrared emitters and infrared receivers fixed thereon, and said second edge having infrared emitters and infrared receivers fixed thereon; and a phase managing mechanism configured to control a phase alternation of said infrared touch screen which has a plurality of phases including at least a first phase and a second phase; wherein said phase managing mechanism controls the infrared emitters fixed on said first edge and the infrared receivers fixed on said second edge to scan said touch detecting region in said first phase; and said phase managing mechanism controls the infrared receivers fixed on said first edge and the infrared emitters fixed on said second edge to scan said touch detecting region in said second phase, and wherein a standard ambient light intensity is preset in said phase managing mechanism; in any of said first phase and said second phase, said phase managing mechanism compares an intensity of ambient light received in the infrared receivers fixed on a current receiving edge with said preset standard ambient light intensity; if the intensity of the ambient light received in the infrared receivers fixed on the current receiving edge is not larger than said preset standard ambient light intensity, said phase managing mechanism controls said infrared touch screen to maintain a current phase of the infrared touch screen; and if the intensity of the ambient light received in the infrared receivers fixed on the current receiving edge is larger than said preset standard ambient light intensity, said phase managing mechanism changes the phase of said infrared touch screen from said current phase to another one of said first phase and said second phase.