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Patent Agency Ranking
公开(公告)号：US09775219B2
公开(公告)日：2017-09-26
申请号：US15042580
申请日：2016-02-12
Inventor： Masaaki Ikehara , Yoshihiko Matsukawa
CPC classification number: H05B37/0272 , H05B33/0863
Abstract: A mobile terminal includes: an image capturer which captures a video of one or more lighting devices each transmitting identification information of the lighting device through visible light communication; an input device which obtains an indication from an operator; a wireless communicator which wirelessly communicates with lighting devices; and a controller which controls the image capturer, the input device, and the wireless communicator, wherein the controller detects, by analyzing a video obtained by the image capturer, identification information of a lighting device included in the video, and if the input device obtains an operation indication directed to the lighting device, transmits a control signal corresponding to the operation indication via the wireless communicator to the lighting device (at least one of the lighting devices) having the detected identification information.
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公开(公告)号：US09077456B2
公开(公告)日：2015-07-07
申请号：US14118930
申请日：2013-03-06
Inventor： Makoto Gotou , Masaaki Ikehara , Yoshihiko Matsukawa
CPC classification number: H04B10/63 , H04B10/116 , H04B10/693
Abstract: A receiving device includes a first conversion unit, an amplification unit, and a microcomputer. The microcomputer includes: a second conversion unit that performs, for each sampling time duration, AD conversion on a voltage signal into an AD-converted value; a first calculation unit that calculates a difference digital value by difference calculation; a second calculation unit that calculates a positive reference value and a negative reference value; a detection unit that detects a rising point starting difference digital values greater than the positive reference value, and a falling point starting difference digital values smaller than the negative reference value; a third calculation unit that calculates a first sample period and a second sample period; and a fourth calculation unit that calculates a modulated signal for each symbol time period based on the first sample period and the second sample period.
Abstract translation: 接收装置包括第一转换单元，放大单元和微计算机。 微型计算机包括：第二转换单元，对于每个采样持续时间，对电压信号进行AD转换为AD转换值; 第一计算单元，其通过差分计算来计算差分数字值; 计算正基准值和负参考值的第二计算单元; 检测单元，其检测上升点开始大于正参考值的差分数字值，以及下降点开始差值数字值小于负参考值; 计算第一采样周期和第二采样周期的第三计算单元; 以及第四计算单元，其基于第一采样周期和第二采样周期来计算每个符号时间段的调制信号。
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公开(公告)号：US09847835B2
公开(公告)日：2017-12-19
申请号：US15041545
申请日：2016-02-11
Inventor： Shigeaki Yamasaki , Yoshihiko Matsukawa
IPC: H04B10/116
CPC classification number: H04B10/116
Abstract: A Lighting device, which performs visible light communication with a receiver including an image sensor, includes: a dividing unit that divides identification information assigned to the lighting device into N packets (where N is a natural number greater than or equal to 2); a block generator that generates signal blocks each of which includes M packets (where M is a natural number greater than or equal to N) that include at least one of each of the N packets; and a light source that sequentially transmits the signal blocks in (i) each frame cycle of the image sensor or in (ii) each cycle substantially equal to an integral multiple of the frame cycle, by superimposing each of the signal blocks onto illumination light. The block generator generates the signal blocks so that an order of arranging the M packets is different between consecutive signal blocks in the signal blocks.
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公开(公告)号：US09837049B2
公开(公告)日：2017-12-05
申请号：US14808107
申请日：2015-07-24
Inventor： Yoshihiko Matsukawa , Masaaki Ikehara
CPC classification number: G09G5/12 , G09G5/006 , G09G2370/042 , G09G2370/16 , G09G2370/22
Abstract: A visible light communication system includes: an illumination device which emits visible light including identification information; an information presentation apparatus which presents information to a person in a range illuminated by the visible light; an information terminal which receives visible light identification information; and an information recording medium which holds pairing information associating the identification information identifying the illumination device with connection information required for connection via wireless communication with the information presentation apparatus. When the information terminal is illuminated by the visible light, the information terminal refers to the pairing information held in the information recording medium to identify the connection information associated with the identification information included in the visible light, and establishes connection with the information presentation apparatus based on the identified connection information.
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公开(公告)号：US09831949B2
公开(公告)日：2017-11-28
申请号：US15167385
申请日：2016-05-27
Inventor： Yoshihiko Matsukawa , Shojirou Kido
CPC classification number: H04B10/116 , H04B10/40 , H04B10/50 , H04L7/0075 , H05B33/0842 , H05B37/0209
Abstract: A modulation device includes a modulator circuit that causes a light source to perform light communication, storage storing an internal ID, and a control circuit that determines whether an external ID is input into the modulation device. When the control circuit determines that the external ID is input into the modulation device, the control circuit causes the input external ID to be input, as a modulation signal, into the modulator circuit. When the control circuit determines that the external ID is not input into the modulation device, the control circuit causes the internal ID stored in the storage to be input, as a modulation signal, into the modulator circuit.
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