Input device

Abstract

Disclosed is an input device capable of decreasing the number of layers of a detecting portion to reduce manufacturing costs and easily deforming layers provided above a pressure sensitive detecting portion. A capacitance-type detecting portion that detects the contact position of a finger on the basis of a variation in capacitance is provided on a pressure sensitive detecting portion that includes a lower detection layer formed on a lower base sheet and an upper detection layer formed on an upper base sheet. A voltage is applied to the pressure sensitive detecting portion and the capacitance-type detecting portion such that the application times of the voltages do not overlap each other. Therefore, it is possible to prevent interference between the detection operations of the two detecting portions.

Description

technical field [0001] The present invention relates to an input device in which a pressure-sensitive type detection part for detecting a pressing position based on a change in impedance value and an electrostatic capacitive type detection part for detecting an approaching position of a pointer such as a finger according to a change in capacitance are superimposed on each other. An input device that is thin and flexible and can maintain the detection accuracy of the two detection parts at a high level. Background technique [0002] The following Patent Document 1 discloses an input device equipped on a personal computer or the like. In this input device, a capacitive detection unit that detects the approach of a conductive indicator such as a finger based on a change in capacitance is superimposed on a pressure sensitive detection unit that detects a pressed position based on a change in impedance value. Electrodes are formed on a flexible resin film in the capacitive detec...

AI Technical Summary

Problems solved by technology

[0006] As mentioned above, if a shield layer is provided between the pressure-sensitive type detection part and the capacitance type detection part, the number of layers constituting the two detection parts will increase, which not only increases the cost, but also makes it difficult to achieve thinning.

[0007] The above-mentioned shielding layer is usually formed of a metal layer, but if a metal layer is provided on the pressure-sensitive detection part, the rigidity of the layer above the pressure-sensitive detection part will be increased due to the presence of the metal layer.

Therefore, when the surface of the input device is pressed with a stylus or the like, it is difficult to deform as a whole, and the detection accuracy of the pressure-sensitive detection part is lowered.

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