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51. 发明授权

US10178506B2 Augmenting light-based communication receiver positioning 有权
公开(公告)号：US10178506B2
公开(公告)日：2019-01-08
申请号：US14572211
申请日：2014-12-16
申请人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
发明人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
IPC分类号： H04B10/116 , H04W4/02
摘要： Techniques are disclosed for augmenting light-based communication (LCom) receiver positioning using, for example, an inertial navigation system (INS). An LCom receiver INS may utilize one or more on-board accelerometers and gyroscopic sensors to calculate, via dead reckoning, the position, orientation, and velocity of the receiver. In this manner, the receiver can calculate its relative position using the INS based on a reference point or location. In some cases, the receiver may also or alternatively determine its location or position using a global positioning system (GPS), Wi-Fi-based positioning system (WPS), or some other suitable positioning system. When no LCom signals are in the FOV of the receiver and/or the link is lost to other positioning systems, the receiver INS may be used to augment the receiver positioning. In some cases, the INS mode may run parallel to other positioning techniques to continuously calculate the relative position of the receiver.

52. 发明授权

US10075234B2 Techniques for emitting position information from luminaires 有权
公开(公告)号：US10075234B2
公开(公告)日：2018-09-11
申请号：US14572258
申请日：2014-12-16
申请人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
发明人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
IPC分类号： H04B10/116 , G01C3/08 , G06T7/90 , H04J3/10 , G06K9/34 , H04B10/516 , H04J14/08 , G06K9/62 , H04B10/079 , H04B10/50 , G01C21/20 , G01S1/70 , G01S5/16 , G01S11/12 , H04B10/114 , G06K9/46 , H04B10/556 , H04N5/353
CPC分类号： H04B10/116 , G01C3/08 , G01C21/206 , G01S1/70 , G01S5/163 , G01S11/12 , G06K9/34 , G06K9/4661 , G06K9/6218 , G06T7/90 , G06T2207/10004 , G06T2207/20021 , H04B10/0795 , H04B10/114 , H04B10/1149 , H04B10/501 , H04B10/502 , H04B10/516 , H04B10/5563 , H04J3/10 , H04J14/086 , H04N5/3532
摘要： Techniques are disclosed for emitting position information from luminaires. Luminaire position information may be emitted via a light-based communication (LCom) signal that comprises data including the position information. The data may include relative and/or absolute position information for the luminaire and may indicate the physical location of the luminaire. Relative position information for the luminaire may include coordinates relative to a point of origin within the environment. Absolute position information for the luminaire may include global coordinates for the luminaire. In some cases, the absolute position information for a luminaire may be calculated using position information for the luminaire relative to a point of origin and the absolute position of the point of origin. The data may also include an environment identifier, which may indicate a map to use for the interpretation of position information for the luminaire. The techniques can be used for both stationary and mobile luminaires.

53. 发明授权

US09948391B2 Techniques for determining a light-based communication receiver position 有权
公开(公告)号：US09948391B2
公开(公告)日：2018-04-17
申请号：US14572081
申请日：2014-12-16
申请人： Christian Breuer , Anant Aggarwal , Barry Stout
发明人： Christian Breuer , Anant Aggarwal , Barry Stout
IPC分类号： H04B10/116 , G01C3/08 , G06T7/90 , H04J3/10 , H04J14/08 , G06K9/34 , G06K9/62 , H04B10/079 , H04B10/50 , H04B10/516 , G01C21/20 , G01S1/70 , G01S5/16 , G01S11/12 , H04B10/114 , G06K9/46 , H04B10/556 , H04N5/353
CPC分类号： H04B10/116 , G01C3/08 , G01C21/206 , G01S1/70 , G01S5/163 , G01S11/12 , G06K9/34 , G06K9/4661 , G06K9/6218 , G06T7/90 , G06T2207/10004 , G06T2207/20021 , H04B10/0795 , H04B10/114 , H04B10/1149 , H04B10/501 , H04B10/502 , H04B10/516 , H04B10/5563 , H04J3/10 , H04J14/086 , H04N5/3532
摘要： Techniques are disclosed for determining a light-based communication (LCom) receiver position. The techniques can be used to determine the position of a receiver relative to a specific luminaire within the field of view (FOV) of the receiver camera. The relative position may be calculated by determining the distance and the orientation of the receiver relative to the luminaire. The distance relative to the luminaire may be calculated using the observed size of the luminaire in an image generated by the receiver camera, the image zoom factor, and actual geometry of the luminaire. The orientation relative to the luminaire may be determined using a fiducial associated with the luminaire that can be used as an orientation cue. Once the position of a receiver relative to a luminaire is determined, the absolute position of the receiver may be calculated using the absolute position of the luminaire.

54. 发明授权

US09780873B2 Light-based communication transmission protocol 有权
公开(公告)号：US09780873B2
公开(公告)日：2017-10-03
申请号：US14572179
申请日：2014-12-16
申请人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
发明人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
IPC分类号： H04B10/116 , G01C3/08 , G06T7/90 , H04J3/10 , G06K9/34 , H04B10/516 , H04J14/08 , G06K9/62 , H04B10/079 , H04B10/50 , G01C21/20 , G01S1/70 , G01S5/16 , G01S11/12 , H04B10/114 , G06K9/46 , H04B10/556 , H04N5/353
CPC分类号： H04B10/116 , G01C3/08 , G01C21/206 , G01S1/70 , G01S5/163 , G01S11/12 , G06K9/34 , G06K9/4661 , G06K9/6218 , G06T7/90 , G06T2207/10004 , G06T2207/20021 , H04B10/0795 , H04B10/114 , H04B10/1149 , H04B10/501 , H04B10/502 , H04B10/516 , H04B10/5563 , H04J3/10 , H04J14/086 , H04N5/3532
摘要： Techniques are disclosed for providing light-based communication (LCom) between a receiver device and one or more transmitting LCom-enabled luminaires. In accordance with some embodiments, LCom data to be transmitted may be allocated over multiple colors of light output by multiple LCom-enabled luminaires and transmitted in parallel across the multiple colors of light using a time division multiple access (TDMA) scheme. In some cases, the disclosed techniques can be used, for example, to allow for multiple LCom-enabled luminaires to communicate simultaneously over multiple active LCom channels with a single receiver device. In some instances, the disclosed techniques may be used, for example, to provide channel redundancy that facilitates successful completion of LCom data transmission when an LCom channel is broken. In some instances, the disclosed techniques may be used, for example, to provide more accurate positioning for indoor navigation.

55. 发明授权

US09762320B2 Techniques for enhancing baud rate in light-based communication 有权
公开(公告)号：US09762320B2
公开(公告)日：2017-09-12
申请号：US14575450
申请日：2014-12-18
申请人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
发明人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
IPC分类号： H04B10/116 , H04B10/69 , G01C3/08 , G06T7/90 , H04J3/10 , H04J14/08 , G06K9/34 , G06K9/62 , H04B10/079 , H04B10/50 , H04B10/516 , G01C21/20 , G01S1/70 , G01S5/16 , G01S11/12 , H04B10/114 , G06K9/46 , H04B10/556 , H04N5/353
CPC分类号： H04B10/116 , G01C3/08 , G01C21/206 , G01S1/70 , G01S5/163 , G01S11/12 , G06K9/34 , G06K9/4661 , G06K9/6218 , G06T7/90 , G06T2207/10004 , G06T2207/20021 , H04B10/0795 , H04B10/114 , H04B10/1149 , H04B10/501 , H04B10/502 , H04B10/516 , H04B10/5563 , H04J3/10 , H04J14/086 , H04N5/3532
摘要： Techniques are disclosed for coding light-based communication (LCom) data in a manner that allows for detection thereof, for example, via a standard low-speed (e.g., 30 frames per second) smartphone camera. In accordance with some embodiments, the disclosed techniques can be used, for example, in encoding and decoding LCom data in a manner that: (1) prevents or otherwise minimizes perceivable flicker of the light output by a transmitting LCom-enabled luminaire; and/or (2) avoids or otherwise reduces a need for additional, specialized receiver hardware at the receiver computing device including the camera. In some cases, the disclosed techniques can be used, for example, to enhance the baud rate between a transmitting LCom-enabled luminaire and a receiver device.

56. 发明授权

US09742493B2 Reconstructing light-based communication signals captured with a rolling shutter image capture device 有权
公开(公告)号：US09742493B2
公开(公告)日：2017-08-22
申请号：US14870055
申请日：2015-09-30
申请人： Christian Breuer , Anant Aggarwal , Barry Stout
发明人： Christian Breuer , Anant Aggarwal , Barry Stout
IPC分类号： H04B10/00 , H04B10/116 , H04N5/353 , H04B10/54 , H04B10/67
CPC分类号： H04B10/116 , H04B10/54 , H04B10/67 , H04N5/3532
摘要： Methods and systems are described for sampling an LCOM message and accurately reconstructing the entire LCOM message using a light receiver (e.g., digital camera) of a typical mobile computing device, such as a smartphone, tablet, or other mobile computing device. These including receiving segments of an LCOM signal from at least two repetitions of the LCOM signal. The location of each segment within the LCOM signal is identified and each segment is stored in a corresponding location in a buffer configured to have a length equal to the LCOM signal. The buffer is a ring buffer, in some embodiments.

57. 发明授权

US09697619B2 Techniques for spatially resolving received light-based communication signals 有权
公开(公告)号：US09697619B2
公开(公告)日：2017-07-04
申请号：US14575393
申请日：2014-12-18
申请人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
发明人： Christian Breuer , Anant Aggarwal , Bernhard Siessegger
IPC分类号： H04B10/116 , G06T7/90 , G01C3/08 , H04J3/10 , H04J14/08 , G06K9/34 , G06K9/62 , H04B10/079 , H04B10/50 , H04B10/516 , G01C21/20 , G01S1/70 , G01S5/16 , G01S11/12 , H04B10/114
CPC分类号： H04B10/116 , G01C3/08 , G01C21/206 , G01S1/70 , G01S5/163 , G01S11/12 , G06K9/34 , G06K9/4661 , G06K9/6218 , G06T7/90 , G06T2207/10004 , G06T2207/20021 , H04B10/0795 , H04B10/114 , H04B10/1149 , H04B10/501 , H04B10/502 , H04B10/516 , H04B10/5563 , H04J3/10 , H04J14/086 , H04N5/3532
摘要： Techniques are disclosed for spatially resolving received light-based communication (LCom) signals. In an example case where one or more LCom signals are in the field of view (FOV) of an LCom receiver, the image representing the FOV may be captured and segmented into non-overlapping cells, such as hexagonal, triangular, rectangular, or circular shaped cells. Each LCom signal may be interpreted as a unique pixel cluster comprising one or more of the cells. In some cases, the LCom signals in the FOV may be received from multiple LCom-enabled luminaires and/or a single LCom-enabled luminaire having multiple light panels. The benefits of being able to spatially resolve received LCom signals may include establishing a link with multiple LCom signals within the FOV of a receiver without conflict and/or determining the location of those LCom signals, improving signal to noise ratio, augmenting position information, enhancing sampling frequency, and improving communication speed.

58. 发明申请

US20170147885A1 Heat-Based Human Presence Detection and Tracking 审中-公开
公开(公告)号：US20170147885A1
公开(公告)日：2017-05-25
申请号：US15422543
申请日：2017-02-02
申请人： Anant Aggarwal , Christian Breuer
发明人： Anant Aggarwal , Christian Breuer
IPC分类号： G06K9/00 , G06T7/246 , H04N7/18 , G06N5/04 , H04N5/33
CPC分类号： G06K9/00778 , G06K9/00342 , G06K9/00369 , G06N5/04 , G06T5/002 , G06T5/20 , G06T7/194 , G06T7/248 , G06T2207/10048 , G06T2207/20021 , G06T2207/30196 , G06T2207/30232 , G08B13/194 , G08B13/19602 , G08B13/19608 , H04N5/33 , H04N7/181 , H04N7/183
摘要： Techniques are disclosed for detecting human presence using IR sensor data. In some embodiments, any activity in a space monitored (imaged) by an IR sensor can be determined by calculating the delta between average image frames acquired by the imaging sensor. A finite value of delta implies activity/presence. In some embodiments, the delta values (i.e., changes in target area scene) are integrated over time to calculate a mask. The mask can be used to isolate a human occupant (whether stationary or moving) in the scene from the given background objects of the space, thus allowing for occupancy detection. Occupancy in known blind spots of the area can be inferred based on detected occupancy in non-blind spots neighboring the blind spot so that entering and exiting with respect to the blind spot is tracked.

59. 发明授权

US09564966B1 Reconstructing light-based communication signals using an alias frequency 有权
标题翻译：使用别名频率重建基于光的通信信号
公开(公告)号：US09564966B1
公开(公告)日：2017-02-07
申请号：US14870445
申请日：2015-09-30
申请人： Christian Breuer , Anant Aggarwal , Barry Stout
发明人： Christian Breuer , Anant Aggarwal , Barry Stout
IPC分类号： H04B10/00 , H04B10/079 , H04W4/02 , G01J1/42
CPC分类号： H04B10/0795 , H04B10/116 , H04W4/023
摘要： Methods and systems are described for sampling an LCOM message signal at a rate less than the Nyquist rate (i.e., an “alias frequency”) and accurately reconstructing the entire LCOM message using a light receiver (e.g., digital camera) of a typical mobile computing device, such as a smartphone, tablet, or other mobile computing device. The described methods and system take advantage of the repetition of LCOM signals, sampling an LCOM signal at a frequency less than the Nyquist frequency over at least two repetitions of a signal waveform, thereby collecting sufficient samples to accurately reconstruct the signal. The samples of each successive signal waveform repetition are offset from one another so that different points on the waveform are sampled, thus facilitating reconstruction of the signal.
摘要翻译：描述了以低于奈奎斯特速率（即，“混叠频率”）的速率对LCOM消息信号进行采样的方法和系统，并且使用典型移动计算机的光接收器（例如，数字照相机）精确地重构整个LCOM消息设备，例如智能电话，平板电脑或其他移动计算设备。所描述的方法和系统利用了LCOM信号的重复，在信号波形的至少两次重复下以小于奈奎斯特频率的频率采样LCOM信号，从而收集足够的样本以精确地重构信号。每个连续信号波形重复的样本彼此偏移，使得波形上的不同点被采样，从而有助于重建信号。

60. 发明授权

US09538597B2 Multichannel power supply 有权
标题翻译：多通道电源
公开(公告)号：US09538597B2
公开(公告)日：2017-01-03
申请号：US13594739
申请日：2012-08-24
申请人： Keng Chen , Christian Breuer
发明人： Keng Chen , Christian Breuer , Canyon Bliss
IPC分类号： H02J4/00 , H05B33/08
CPC分类号： H05B33/0842 , Y10T307/305
摘要： Systems and methods for a multichannel power supply are disclosed. The multichannel power supply includes a front end circuit configured to receive an input voltage and to provide a regulated front end direct current (DC) voltage. A multichannel source circuit is coupled to the front-end circuit. The multichannel source circuit includes a controller, a reference voltage circuit, and a plurality of source circuits. Each source circuit in the plurality of source circuits represents a distinct output channel of the multichannel power supply. The multichannel source circuit is configured to generate a constant current output for each source circuit in the plurality of source circuits. Each load in a plurality of loads is connected to a corresponding source circuit in the plurality of source circuits and is configured to receive the corresponding constant current output via the corresponding source circuit.
摘要翻译：公开了用于多通道电源的系统和方法。多通道电源包括配置为接收输入电压并提供调节的前端直流（DC）电压的前端电路。多通道源电路耦合到前端电路。多通道源电路包括控制器，参考电压电路和多个源电路。多个源电路中的每个源电路表示多通道电源的不同的输出通道。多通道源电路被配置为为多个源电路中的每个源电路产生恒定电流输出。多个负载中的每个负载连接到多个源电路中的对应的源电路，并且被配置为经由相应的源电路接收相应的恒定电流输出。

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