US 12,293,249 B2
Pressure sensor and optical information reader
Kazumi Kambe, Chita-gun (JP); and Akira Ito, Chita-gun (JP)
Assigned to DENSO WAVE INCORPORATED, Aichi-Pref. (JP)
Filed by DENSO WAVE INCORPORATED, Aichi-pref. (JP)
Filed on Oct. 27, 2022, as Appl. No. 17/975,426.
Claims priority of application No. 2021-175815 (JP), filed on Oct. 27, 2021.
Prior Publication US 2023/0129309 A1, Apr. 27, 2023
Int. Cl. G06K 7/10 (2006.01); G01L 1/16 (2006.01); G01L 5/22 (2006.01); G01R 19/165 (2006.01); G06F 3/02 (2006.01); H10N 30/30 (2023.01)
CPC G06K 7/10881 (2013.01) [G01L 1/16 (2013.01); G01L 5/22 (2013.01); G01R 19/16576 (2013.01); G06F 3/02 (2013.01); G06K 2007/10524 (2013.01); H10N 30/30 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A pressure sensor comprising:
a pressure sensing member having a pressable input surface that is deformable, the pressure sensing member being configured to generate an output voltage based on a deformation amount of the pressable input surface; and
a controller configured to:
sample a value of the output voltage as a first sampled value;
determine whether the first sampled value of the output voltage is higher than a predetermined first voltage threshold;
determine a start of a user's press on the pressable input surface upon determination that the first sampled value of the output voltage is higher than the first voltage threshold;
sample, after determination of the start of the user's press on the pressable input surface, a value of the output voltage as a second sampled value; and
determine whether one of a first condition and a second condition is satisfied to accordingly determine whether the user's press on the pressable input surface is terminated,
the first condition representing that the second sampled value of the output voltage is lower than a predetermined second voltage threshold,
the second condition representing that the output voltage has converged to a base voltage,
the base voltage being a value of the output voltage of the pressure sensing member with no user's press on the pressable input surface of the pressure sensing member.