公开(公告)号：US08913893B2

公开(公告)日：2014-12-16

申请号：US13427714

申请日：2012-03-22

申请人： Dae-Ho Kim ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  Il-Soon Jang ,  You-Jin Kim

发明人： Dae-Ho Kim ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  Il-Soon Jang ,  You-Jin Kim

IPC分类号： H04B10/00 ,  H04B10/116

CPC分类号： H04B10/116

摘要： Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining a dimming level variable to perform minute dimming control, selecting an upper dimming symbol and a lower dimming symbol, which belong to Variable Pulse Position Modulation (VPPM) symbols, based on the dimming level variable, determining at least one of the number of upper dimming symbols to be sent and the number of lower dimming symbols to be sent based on the dimming level variable, and generating a transmission sequence corresponding to the dimming level variable by combining the upper dimming symbols and the lower dimming symbols based on the number of symbols to be sent.

摘要翻译： 本文公开了可见光通信方法和装置。 可见光通信方法包括：基于调光电平变量确定调光电平变量以执行微调光控制，选择属于可变脉冲位置调制（VPPM）符号的上调光符号和下调光符号，至少确定 基于调光电平变量发送的上调光符号的数量和要发送的下调光符号的数量之一，以及通过组合上调光符号和下调光符号来生成与调光电平变量相对应的发送序列 基于要发送的符号数量。

公开(公告)号：US08903252B2

公开(公告)日：2014-12-02

申请号：US13609766

申请日：2012-09-11

申请人： II-Soon Jang ,  Dae-Ho Kim ,  Sang-Kyu Lim ,  Tae-Gyu Kang

发明人： II-Soon Jang ,  Dae-Ho Kim ,  Sang-Kyu Lim ,  Tae-Gyu Kang

IPC分类号： H04B10/116 ,  H04B10/114 ,  H04J14/02

CPC分类号： H04B10/116 ,  H04B10/1149 ,  H04J14/02

摘要： There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed.

摘要翻译： 公开了能够直观地识别传输速度，对准状态，通信状态或传输速率的可见光通信技术。 根据本发明实施例的可见光通信装置包括：光源选择单元，通过考虑根据可见光中的波长区分的直观信息来选择产生具有不同波长的光的多个光源的至少一个光源 带; 以及可见光通信单元，其通过至少一个选择的光源执行可见光通信，以允许通过与至少一个所选择的光源相对应的颜色来识别直观信息。 因此，使用可见光通信的用户可以直观地知道最佳通信状态或传输速度。

公开(公告)号：US08447189B2

公开(公告)日：2013-05-21

申请号：US12883574

申请日：2010-09-16

申请人： Dae-Ho Kim ,  Sang-Kyu Lim ,  Il-Soon Jang ,  Tae-Gyu Kang

发明人： Dae-Ho Kim ,  Sang-Kyu Lim ,  Il-Soon Jang ,  Tae-Gyu Kang

IPC分类号： H04B10/00

CPC分类号： H04B10/116 ,  H04B10/1149

摘要： A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication.

摘要翻译： 可见光无线通信接收机包括：源代码识别单元，其接收源比特流并将源比特流识别为第一比特数的单位的源代码; 以及行编码单元，其将每个源代码编码为第二位数单位的编码码，第二数大于第一数。 特别地，在编码代码中，对应于1的比特数与对应于0的比特数相同。因此，在可见光无线通信中照明亮度的变化可能被最小化。

公开(公告)号：US08417122B2

公开(公告)日：2013-04-09

申请号：US12846359

申请日：2010-07-29

申请人： Dae-Ho Kim ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  Il-Soon Jang

发明人： Dae-Ho Kim ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  Il-Soon Jang

IPC分类号： H04B10/00

CPC分类号： H04B10/116 ,  H04B10/1143

摘要： A visible light communication apparatus of the present invention includes: a target signal receiver filtering only a signal having a target wavelength from a visible light received signal received from a transmitting terminal; a signal generator judging a reception quality of the visible light received signal by using characteristics of the signal having the target wavelength and generating a visible signal by using at least one light source having a wavelength different from the target wavelength in accordance with the reception quality; and an optical signal transmitter transmitting the signal having the target wavelength for transmitting data together with the visible signal and changing a light emitting color of a visible light transmitted signal.

摘要翻译： 本发明的可见光通信装置包括：目标信号接收机，从发射端子接收到的可见光接收信号仅滤除具有目标波长的信号; 信号发生器，通过使用具有目标波长的信号的特性来判断可见光接收信号的接收质量，并根据接收质量通过使用至少一个具有与目标波长不同的波长的光源产生可见信号; 以及光信号发射器，将具有目标波长的信号与可见信号一起发射，并且改变可见光发射信号的发光颜色。

公开(公告)号：US08391720B2

公开(公告)日：2013-03-05

申请号：US12846351

申请日：2010-07-29

申请人： Il-Soon Jang ,  Dae-Ho Kim ,  Sang-Kyu Lim ,  Tae-Gyu Kang

发明人： Il-Soon Jang ,  Dae-Ho Kim ,  Sang-Kyu Lim ,  Tae-Gyu Kang

IPC分类号： H04B10/00

CPC分类号： H04B10/116 ,  H04B10/1149 ,  H04J14/02

摘要： There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed.

公开(公告)号：US20120154824A1

公开(公告)日：2012-06-21

申请号：US13310598

申请日：2011-12-02

申请人： Dae Ho KIM ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  Il-Soon Jang ,  You Jin Kim

发明人： Dae Ho KIM ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  Il-Soon Jang ,  You Jin Kim

IPC分类号： G01B11/14

CPC分类号： G01S11/12 ,  G01S5/16 ,  G01S5/163

摘要： A position measuring apparatus receives at least one precise position information set from at least one visible-light wireless communication device including a transmission light source, and upon receipt of the at least one precise position information ser, acquires a virtual distance based on the positions of transmission light sources imaged on an image sensor. Next, the position is measured according to the precise position information and the actual distance, virtual distance, and image sensor inclination based on this information.

摘要翻译： 位置测量装置从至少一个包括传输光源的可见光无线通信设备接收至少一个精确位置信息集，并且在接收到至少一个精确位置信息服务时，基于位置信息的位置获取虚拟距离 传输光源成像在图像传感器上。 接下来，基于该信息，根据精确位置信息和实际距离，虚拟距离和图像传感器倾角来测量位置。

公开(公告)号：US20110026918A1

公开(公告)日：2011-02-03

申请号：US12846359

申请日：2010-07-29

申请人： Dae-Ho KIM ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  II-Soon Jang

发明人： Dae-Ho KIM ,  Tae-Gyu Kang ,  Sang-Kyu Lim ,  II-Soon Jang

IPC分类号： H04B10/08 ,  H04B10/00

CPC分类号： H04B10/116 ,  H04B10/1143

摘要： A visible light communication apparatus of the present invention includes: a target signal receiver filtering only a signal having a target wavelength from a visible light received signal received from a transmitting terminal; a signal generator judging a reception quality of the visible light received signal by using characteristics of the signal having the target wavelength and generating a visible signal by using at least one light source having a wavelength different from the target wavelength in accordance with the reception quality; and an optical signal transmitter transmitting the signal having the target wavelength for transmitting data together with the visible signal and changing a light emitting color of a visible light transmitted signal.

摘要翻译： 本发明的可见光通信装置包括：目标信号接收机，从发射端子接收到的可见光接收信号仅滤除具有目标波长的信号; 信号发生器，通过使用具有目标波长的信号的特性来判断可见光接收信号的接收质量，并根据接收质量通过使用至少一个具有与目标波长不同的波长的光源产生可见信号; 以及光信号发射器，将具有目标波长的信号与可见信号一起发射，并且改变可见光发射信号的发光颜色。

公开(公告)号：US20070285181A1

公开(公告)日：2007-12-13

申请号：US11745750

申请日：2007-05-08

申请人： Sang Kyu LIM ,  Sang Soo LEE ,  Hyun Jae LEE ,  Je Soo KO

发明人： Sang Kyu LIM ,  Sang Soo LEE ,  Hyun Jae LEE ,  Je Soo KO

IPC分类号： H03B1/00

CPC分类号： H04L7/027 ,  H01L23/66 ,  H01L2924/0002 ,  H04L7/0087 ,  H01L2924/00

摘要： Provided is a multi-mode open-loop type clock extraction apparatus. In the apparatus, a power divider block divides an input data signal into two data signals. A first band-pass filter block and a second band-pass filter block extract a first clock frequency component or a second clock frequency component contained in the data signal output from the power divider. A first amplifier block and a second amplifier block amplify the first clock frequency component and the second clock frequency component respectively. Accordingly, it is possible to extract the respective clock signals corresponding to N data rates from the N data signals with various data rates using a single clock extraction apparatus.

摘要翻译： 提供了一种多模式开环型时钟提取装置。 在该装置中，功率分配器块将输入数据信号分成两个数据信号。 第一带通滤波器块和第二带通滤波器块提取包含在从功率分配器输出的数据信号中的第一时钟频率分量或第二​​时钟频率分量。 第一放大器块和第二放大器块分别放大第一时钟频率分量和第二时钟频率分量。 因此，可以使用单个时钟提取装置从具有各种数据速率的N个数据信号中提取与N个数据速率对应的各个时钟信号。

公开(公告)号：US20050129411A1

公开(公告)日：2005-06-16

申请号：US10876436

申请日：2004-06-24

申请人： Hyunwoo Cho ,  Sang-Soo Lee ,  Sang-Kyu Lim ,  Jyung-Chan Lee ,  Seung-Il Myong ,  Je-Soo Ko

发明人： Hyunwoo Cho ,  Sang-Soo Lee ,  Sang-Kyu Lim ,  Jyung-Chan Lee ,  Seung-Il Myong ,  Je-Soo Ko

IPC分类号： H04B10/04 ,  G02F1/01 ,  H04B10/155 ,  G02F1/035 ,  H04B10/00

CPC分类号： H04B10/505 ,  G02F1/0123 ,  H04B10/50575 ,  H04B10/58

摘要： Provided are an apparatus for optimizing bias voltage of an electro-optic modulator, a method therefor, and an optical transmission system using the method. The present research provides a bias voltage optimizing apparatus of an electro-optic modulator that can stabilize bias voltage supplied to the electro-optic modulator through automatic bias voltage initialization control by considering the point that the form of an optical output signal and the intensity of a clock component are changed according to the bias voltage of the electro-optic modulator, a method therefor and an optical transmission system using the method. The apparatus includes: a clock extracting unit for extracting a clock frequency component from the frequency components in a wideband spectrum of the electro-optic modulator; a control unit for finding a point of the lowest electric intensity by detecting an electric intensity of the extracted frequency component and controlling the bias voltage adaptively by changing the bias voltage; and a bias voltage adjusting unit for controlling the bias voltage of the electro-optic modulator under the control of the bias voltage controlling unit.

摘要翻译： 提供一种用于优化电光调制器的偏置电压的装置，其方法和使用该方法的光传输系统。 本研究提供了一种电光调制器的偏置电压优化装置，通过考虑光输出信号的形式和光输出信号的强度，可以通过自动偏置电压初始化控制来稳定提供给电光调制器的偏置电压 时钟分量根据电光调制器的偏置电压，其方法和使用该方法的光传输系统而改变。 该装置包括：时钟提取单元，用于从电光调制器的宽带频谱中的频率分量中提取时钟频率分量; 控制单元，用于通过检测所提取的频率分量的电强度并通过改变所述偏置电压自适应地控制所述偏置电压来找到最低电强度的点; 以及偏置电压调整单元，用于在偏置电压控制单元的控制下控制电光调制器的偏置电压。

公开(公告)号：US20090154937A1

公开(公告)日：2009-06-18

申请号：US12201532

申请日：2008-08-29

申请人： Sang Kyu LIM ,  Je Soo KO

发明人： Sang Kyu LIM ,  Je Soo KO

IPC分类号： H04B10/00

CPC分类号： H04B10/299 ,  H04L7/0075 ,  H04L7/027

摘要： Provided is an apparatus and method for restoring clock signals by using a circulator in an optical transmission system. The apparatus includes a circulator, which allows one of N types of input data signals having different transmission speeds to circulate in a single direction, band pass filters, which extract N types of clock frequency components respectively corresponding to each transmission speed of the N types of input data signals, and clock amplifiers, which amplify each of the N types of clock frequency components.

摘要翻译： 提供了一种通过在光传输系统中使用环行器来恢复时钟信号的装置和方法。 该装置包括循环器，其允许具有不同传输速度的N种类型的输入数据信号之一在单个方向上循环，带通滤波器，其提取分别对应于N种类型的每个传输速度的N种类型的时钟频率分量 输入数据信号和时钟放大器，其放大N种类型的时钟频率分量。