| CPC B60R 16/005 (2013.01) [B60R 16/0231 (2013.01); G06F 3/0444 (2019.05); H03K 17/962 (2013.01)] | 5 Claims |
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1. An operation panel, comprising:
a panel member;
a switch unit provided on the panel member and to be pressed by a user;
a sensor unit configured to output an electrical signal corresponding to a contact area between a finger of a user and the switch unit; and
a control unit to which the electrical signal is input from the sensor unit, wherein the control unit is configured to:
determine that a finger of a user and the switch unit are in contact with each other when a calculation value calculated based on the electrical signal input from the sensor unit exceeds a preset first threshold value, and set, based on the calculation value, a second threshold value larger than the first threshold value in accordance with a magnitude of the calculation value; and
determine that the switch unit is in an operation state of being operated when the calculation value exceeds the second threshold value, and wherein
the second threshold value is set by multiplying, by a predetermined coefficient, the calculation value which is calculated for a first time when the calculation value exceeds the first threshold value, the second threshold value set within a range that does not exceed a third threshold value which is a predetermined upper limit value,
the control unit further configured to:
set a fourth threshold value based on the calculation value after determining that the switch unit is in the operation state; and
determine that the switch unit is in a non-operation state when the calculation value is equal to or smaller than the fourth threshold value.
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