Patent ID: 9507456
Filing Date: 2016-11-29
CPC Classification: G06F

Claim Text:
1. A touch panel provided with performances of force measurement using a piezoelectric body and point detection using a projected capacitive system, the touch panel comprising: a pair of electrodes arranged with a plate-like piezoelectric body sandwiched between the pair of electrodes, each of the pair of electrodes comprising a conductive member, the piezoelectric body having a plate-like surface parallel to a x-y plane, the piezoelectric body and the pair of electrodes being layered vertically, and the pair of electrodes including a sensing electrode and a ground electrode, and being employed for the force measurement; and two types of electrodes including one type comprising a group of conductive members arranged parallel to a certain direction on the x-y plane and the other type comprising another group of conductive members arranged parallel to each other and extending in a direction across the certain direction on the x-y plane, the two types of electrodes being employed for the point detection; wherein at least one upper electrode is disposed on a side of a top surface of the piezoelectric body, the conductive member constituting the upper electrode has at least a part forming a plane parallel to the x-y plane, at least one lower electrode is disposed on a side of a bottom surface of the piezoelectric body, the conductive member constituting the lower electrode has at least a part forming a plane parallel to the x-y plane, one of the pair of electrodes used for the force measurement is the lower electrode, and at least one of the two types of electrodes used for the point detection is the upper electrode, a sum of numbers of the electrodes in the upper and lower electrodes is three, the ground electrode is used as the one type of the electrode or the other type of the electrode for the point detection, the touch panel is used on a display surface of a display device, a visible light emitted from the display surface of the display device is a linearly-polarized light, and the piezoelectric body is a wave plate used in an arrangement to make an angle ranging from 20 degrees to 70 degrees between a slow axis of the wave plate of the piezoelectric body and a plane of vibration of the linearly-polarized light.