Pressure sensor

Abstract

To provide a pressing force sensor with which, while detecting a pressure value having acted in an individual detection region, it is possible to detect an accurate total load value.SOLUTION: A pressing force sensor comprises an input plane that is pressed, and a first sensor and a second sensor that are stacked on the input plane sequentially in the pressing direction. A detection region for detecting pressure is provided to the input plane. One of the first and second sensors is a pressure distribution sensor provided with a plurality of individual detection regions into which the detection region is divided, and detecting the pressure inputted to the individual detection regions. The other of the first and second sensor is a pressure sensor provided with a general detection region that overlaps at least two or more individual detection regions, and detecting the pressure inputted to the general detection region.SELECTED DRAWING: Figure 4

Claims

1. The input surface that is pressed, A first sensor and a second sensor are stacked sequentially on the input surface in the pressing direction, Information processing unit, Equipped with, The input surface is provided with a detection region for detecting pressure. One of the first sensor and the second sensor is a pressure distribution sensor that has a plurality of individual detection regions obtained by dividing the detection region, and detects the pressure input to the individual detection region. The other of the first and second sensors is a pressure sensor that has an inclusive detection area that overlaps with at least two or more individual detection areas, and detects the pressure input to the inclusive detection area. The information processing unit receives the detection result of the pressure distribution sensor and the detection result of the pressure sensor, calculates a correction coefficient from the following equation 1, and calculates the corrected pressure value in the individual detection area from the following equation 2. Pressure sensor. [Math 1] [Math 2] In equations 1 and 2, A is the correction coefficient. In equations 1 and 2, pi represents the pressure value for each individual detection region obtained by the pressure distribution sensor. In equation 1, si represents the area of ​​each individual detection region. In equation 1, m represents the number of individual detection regions arranged in a first direction intersecting the pressing direction. In equation 1, n is the number of individual detection regions arranged in a second direction that intersects both the pressing direction and the first direction. In equation 1, W represents the total load obtained from the pressure sensor. In equation 2, pi * represents the corrected pressure value in the individual detection region.

2. The first sensor is the pressure distribution sensor. The pressure sensor according to claim 1.

3. The first sensor is the pressure sensor. The pressure sensor according to claim 1.

4. The first sensor and the second sensor are bonded together by an adhesive layer. The pressure sensor according to claim 1.

5. The first sensor has a bottom surface facing the pressing direction, The second recovery is, First electrode and, A second electrode is positioned relative to the first electrode in the pressing direction and facing the first electrode, It has, The first electrode is provided on the bottom surface of the first sensor. The pressure sensor according to claim 1.

6. The comprehensive detection region overlaps with the entire range of the detection region. The pressure sensor according to claim 1.

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