公开(公告)号：US20210018379A1

公开(公告)日：2021-01-21

申请号：US17043622

申请日：2019-01-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hironobu UKITSU ,  Yuta MORIURA ,  Hiroyuki FURUYA ,  Takashi MATSUMOTO ,  Yui SAWADA

IPC: G01L1/14 ,  G01D5/24 ,  G01R27/26

Abstract: A capacitance detection device includes: a sensor unit including a plurality of sensor elements; row control lines; column control lines; a control circuit supplying a charging voltage to the sensor element; and an equipotential circuit outputting a potential equal to the potential of the sensor element subject to measurement. The control circuit applies a charging voltage to the row control line connected to the sensor element and connects the column control line connected to the sensor element to the ground potential side. The control circuit causes the equipotential circuit to set a potential of at least one of the row control lines other than the row control line connected to the sensor element subject to measurement and the column control lines other than the column control line connected to the sensor element subject to measurement to a potential equal to the potential of the sensor element subject to measurement.

公开(公告)号：US20190228705A1

公开(公告)日：2019-07-25

申请号：US16242594

申请日：2019-01-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroyuki FURUYA ,  Susumu URAGAMI ,  Yuta YAMAMOTO ,  Akira KUROZUKA ,  Mitsutaka YAMAGUCHI

IPC: G09G3/3233 ,  G02B27/01 ,  G02B5/08 ,  G02B26/12 ,  G03B21/20

Abstract: An image display device includes: a light source emitting laser light; a screen on which an image is drawn by being two-dimensionally scanned by the laser light; a scanner causing the laser light to scan the screen; a light detector detecting a light amount of the laser light emitted from the light source; and a controller controlling the light source by changing a current value to drive the light source in response to a target light amount. The controller obtains a detection signal when driving the light source at a plurality of current setting values from the light detector, and corrects the current value with respect to the target light amount according to an arithmetic operation configured to suppress a difference between an output characteristic of the light source guessed by the obtained detection signal and a reference output characteristic.