Patent ID: 8537137
Filing Date: 2013-09-17
Classification: G06F,G09G,Y02D

Abstract:
1. An input device provided in an information processing apparatus having a display, comprising: light-emitting units, which are arranged around the display, and configured to emit an inspection light; light-receiving units, which are arranged around the display, and configured to receive the inspection light; and a control unit configured to determine whether an input is valid or not based on an intensity of light received by the light-receiving units, and transit to an energy-saving mode when the input is not valid; wherein the control unit determines whether the input is valid based on whether a rate of a number of the light-receiving units among a total number of the light-receiving units which are arranged in a horizontal direction and receive received light having intensity higher than a first threshold value exceeds a second threshold value, wherein the light-receiving units are arranged in horizontal and vertical directions on sides of the display, and the control unit determines whether the input is valid or not based on whether a product of a rate of the number of the light-receiving units among the total number of the light-receiving units, which are arranged in the horizontal direction and receive light having intensity higher than a first threshold value, and a rate of the light-receiving units among the total number of the light-receiving units, which are arranged in the vertical direction receive light having intensity higher than a second threshold value, exceeds a third threshold value.