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1.发明授权公开(公告)号：US10921702B2
公开(公告)日：2021-02-16
申请号：US16235196
申请日：2018-12-28
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Akira Inoue , Tomoya Makino , Koichi Kato
Abstract: An abnormality detection unit according to the invention includes a processor, and a light source device configured to emit light for each of segment periods that are time divided within a frame, and the processor obtains an illuminance value of light emitted into the frame from the light source device after a predetermined delay time has elapsed, whereupon a segment period results where a highest illuminance value is obtained, from a timing of receiving a trigger signal that is in synchronism with the frame, and detects that the light source device is in an abnormal state, when the illuminance value is less than a predetermined threshold.
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公开(公告)号：US10748470B2
公开(公告)日：2020-08-18
申请号：US16132141
申请日：2018-09-14
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Koichi Kato
IPC: G06F1/32 , G06F1/26 , G06F1/00 , G09G3/20 , G06F1/3234 , G06F1/3218 , G09G3/00
Abstract: A level shifter included in a device includes an external interface power circuit configured to supply a power voltage corresponding to electrical input-output characteristics of an interface circuit of an external device, an internal interface power circuit configured to supply a power voltage corresponding to electrical input-output characteristics of an internal interface circuit in the device, a power switch configured to control power supply to the external interface power unit according to an electrical signal from the external device, and a selector configured to control conduction between the interface circuit of the external device and the internal interface circuit. The selector is configured to transition to an operable state when the external interface power unit is supplied with power.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20190215501A1
公开(公告)日：2019-07-11
申请号：US16224355
申请日：2018-12-18
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Koichi Kato , Tomoya Makino , Akira Inoue
IPC: H04N9/31
CPC classification number: H04N9/3194 , H04N9/3161
Abstract: An abnormality detection unit includes a light source device configured to emit light for each of segment periods that are time divided in a frame and an illuminance value obtaining unit configured to obtain an illuminance value of light emitted from the light source device and determines that the light source device is abnormal when all illuminance values obtained at the segment periods are less than a threshold.
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公开(公告)号：US11906991B2
公开(公告)日：2024-02-20
申请号：US17940469
申请日：2022-09-08
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Koichi Kato
CPC classification number: G05F1/46 , H04B10/693
Abstract: An electronic device includes first and second connecting wires to which first and second signal wires are connectable, respectively, and a first resistor. The first signal wire transmits a first signal between the electronic device and an external device. The second signal wire transmits a second signal from the external device to the electronic device. The first resistor is disposed between the first connecting wire and a power source of the electronic device. A resistance value of the first resistor is set such that an output voltage from the second connecting wire is lower than a reference value when a voltage of the power source is input to the second connecting wire via the first connecting wire and the external device in a state in which the first and second signal wires are electrically connected to one another and the second signal is not input to the second signal wire.
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5.发明授权公开(公告)号：US10897604B2
公开(公告)日：2021-01-19
申请号：US16224355
申请日：2018-12-18
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Koichi Kato , Tomoya Makino , Akira Inoue
IPC: H04N9/31
Abstract: An abnormality detection unit includes a light source device configured to emit light for each of segment periods that are time divided in a frame and an illuminance value obtaining unit configured to obtain an illuminance value of light emitted from the light source device and determines that the light source device is abnormal when all illuminance values obtained at the segment periods are less than a threshold.
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6.发明申请公开(公告)号：US20190212641A1
公开(公告)日：2019-07-11
申请号：US16235196
申请日：2018-12-28
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Akira Inoue , Tomoya Makino , Koichi Kato
IPC: G03B21/20
CPC classification number: G03B21/206 , G03B21/204
Abstract: An abnormality detection unit according to the invention includes a processor, and a light source device configured to emit light for each of segment periods that are time divided within a frame, and the processor obtains an illuminance value of light emitted into the frame from the light source device after a predetermined delay time has elapsed, whereupon a segment period results where a highest illuminance value is obtained, from a timing of receiving a trigger signal that is in synchronism with the frame, and detects that the light source device is in an abnormal state, when the illuminance value is less than a predetermined threshold.
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公开(公告)号：US10102791B2
公开(公告)日：2018-10-16
申请号：US15046208
申请日：2016-02-17
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Koichi Kato
Abstract: A level shifter included in a device includes: an external interface power unit configured to supply a power voltage corresponding to electrical input-output characteristics of an interface circuit of an external device; an internal interface power unit configured to supply a power voltage corresponding to electrical input-output characteristics of an internal interface circuit in the device; a power switch unit configured to control power supply to the external interface power unit according to an electrical signal from the external device; and a selector unit configured to control conduction between the interface circuit of the external device and the internal interface circuit, wherein the selector unit is configured to transition to an operable state when the external interface power unit is supplied with power.
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