Patent ID: 8390578

Claim:
A sensing device comprising: a plurality of sensors that are arrayed on a screen and that generate first detection signals each having a level corresponding to a touch state of an object on the screen or a distance between the object and the screen; a read unit that reads the first detection signals from the plurality of sensors at predetermined periods; a binarization unit that compares a level of each of the first detection signals read by the read unit with a threshold value and generates a second detection signal that is binarized; a determination unit that determines whether or not the object touches the screen on the basis of each second detection signal; a detection unit that detects a touch position of the object on the screen on the basis of each second detection signal; and a control unit that controls the read unit such that the predetermined period becomes a first period when the determination unit determines that there is no touch and that controls the read unit such that the predetermined period becomes a second period shorter than the first period when the determination unit determines that there is a touch, wherein the control unit: controls the read unit such that the predetermined period becomes the first period when (i) the determination unit determines that there is no touch and (ii) when the determination unit determines that there is a touch but the touch does not continue at least for a predetermined time and controls the read unit such that the predetermined period becomes the second period when the determination unit determines that the touch continues at least for the predetermined time.