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.

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.

公开(公告)号：US12080152B2

公开(公告)日：2024-09-03

申请号：US17947277

申请日：2022-09-19

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Masaki Kobayashi ,  Kiyoshi Oda ,  Hiroshi Saito ,  Akira Inoue

IPC: G03B21/20 ,  G03B21/14 ,  G08B5/36

CPC classification number: G08B5/36 ,  G03B21/145 ,  G03B21/2046 ,  G03B21/2053

Abstract: A projection processing device comprises a processor control unit that acquires, in response to acceptance of input information, projection position information associated with the input information, and instructs a projector to emit light or project an image enabling a user to identify a position based on the acquired projection position information.

公开(公告)号：US11934087B2

公开(公告)日：2024-03-19

申请号：US17539554

申请日：2021-12-01

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Tomoyuki Ueda ,  Tetsuro Narikawa ,  Toshifumi Kase ,  Akira Inoue

IPC: G03B21/16 ,  H04N9/31

CPC classification number: G03B21/16 ,  H04N9/3144

Abstract: A projector includes a cooling fan, and a processor, and the processor executes, in a case in which the cooling fan is operating in a first revolution speed mode, a control of switching an operation mode of the cooling fan to a second revolution speed mode whose revolution speed is faster than that of the first revolution speed mode in a case in which an obtained temperature detection value reaches a first threshold, and executes, in a case in which the cooling fan is operating in the second revolution speed mode, a control of switching the operation mode of the cooling fan to a revolution speed mode whose revolution speed is slower than that of the second revolution speed mode in a case in which an obtained temperature detection value decreases below a second threshold which differs from the first threshold.

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

IPC: G03B21/20 ,  H04N9/31

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.

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.