COORDINATE DETECTION APPARATUS

摘要

In a coordinate detection apparatus, a resistance-film is formed on a substrate made of an insulating material. A common electrode applies a voltage to the resistance-film, the common electrode extending along a plurality of a resistance-film removal areas formed by removing portions of the resistance-film. A voltage application part applies the voltage to the common electrode. The voltage is applied from the voltage application part to the resistance-film through the common electrode to generate a potential distribution in the resistance-film. A coordinate position of a contact position at which the resistance-film is contacted is detected by detecting a potential of the resistance-film at the contact position.

主权项

1. A coordinate detection apparatus comprising:
a resistance-film formed on a substrate; a plurality of resistance-film removal areas formed on a marginal area of the substrate, each of the resistance-film removal areas is formed by removing a portion of the resistance-film; and a common electrode configured to apply a voltage to the resistance-film, the common electrode including potential supply parts each configured to apply the voltage to the resistance-film, wherein each of the potential supply parts is provided at a position between adjacent resistance-film removal areas, wherein the resistance-film removal areas are configured and arranged so that a uniform potential distribution is generated in the resistance-film when the voltage is applied to the resistance film, and wherein each of the potential supply parts is formed so that a contact area between the common electrode and the resistance-film per unit length is gradually reduced from a middle portion of each side of the substrate toward each end of the side.