Patent ID: 8334852
Filing Date: 2012-12-18
Classification: G06F

Abstract:
1. A position detecting device comprising: a plurality of conductors arranged in parallel with each other in a first direction and supplied with a predetermined signal; a plurality of conductors arranged in parallel with each other in a second direction orthogonal to the first direction; a signal detecting circuit including a differential amplifier circuit having a first input terminal and a second input terminal and subjecting a signal input via the first input terminal and the second input terminal to differential amplification; and a conductor selecting circuit for selectively connecting the plurality of conductors arranged in parallel with each other in said second direction to the first input terminal and the second input terminal of said differential amplifier circuit, whereby a position indicated by an indicating object is detected on a basis of an output signal from said signal detecting circuit; wherein said selecting circuit further selects the plurality of conductors arranged in parallel with each other in said second direction with passage of time such that of the plurality of conductors arranged in parallel with each other in said second direction, M (M>=2) conductors adjacent to each other are connected to said first input terminal of said differential amplifier circuit, N (N>=2) conductors adjacent to each other, the N conductors being in proximity to said M conductors adjacent to each other, are connected to said second input terminal of said differential amplifier circuit, and 2P (P>=1) conductors adjacent to each other among the conductors excluding said M conductors and said N conductors, the number P being set smaller than said N, are divided into first and second groups of conductors, each group including P conductor(s), and the first group of P conductor(s) are connected to said first input terminal of said differential amplifier circuit and the second group of P conductor(s) are connected to said second input terminal of said differential amplifier circuit.