Method of calibrating pressure sensor with magnet
AssigneeJapan Display Inc.
InventorHiroumi Kinjo
Life of this patent
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Abstract
According to one embodiment, a calibration method includes placing a pressure sensor on a base material having magnetic properties, placing a magnet on the pressure sensor, attracting the magnet to the base material while interposing the pressure sensor therebetween and applying a predetermined pressing force onto the pressure sensor, detecting a sensor output of a pressure-sensitive portion pressed by the magnet, estimating the deterioration of the pressure sensor by comparing the sensor output with a specified value corresponding to characteristics of the magnet, generating correction data to calibrate the degradation and inputting the generated correction data to the pressure sensor.
Claims15
A calibration method of calibrating degradation of a sheet shaped pressure sensor including a plurality of pressure-sensitive portions arranged in a matrix, the method comprising:
- placing the sheet shaped pressure sensor on a flat installation surface of a base material having magnetic properties;
- placing a magnet with a surface portion resting directly on the sheet shaped pressure sensor, attracting the magnet to the base material while interposing the sheet shaped pressure sensor therebetween and applying a predetermined pressing force of the magnet resting on the sheet shaped pressure sensor;
- generating, for each of the pressure-sensitive portions pressed by the magnet, a respective sensor output;
- estimating a deterioration of the sheet shaped pressure sensor by comparing the sensor output of each of the pressure-sensitive portions with a specified value corresponding to characteristics of the magnet;
- generating correction data to calibrate the deterioration;
- and
- inputting or updating the generated correction data to the sheet shaped pressure sensor.
Dependencies are inferred from the claim text.