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公开(公告)号：US20190326997A1
公开(公告)日：2019-10-24
申请号：US16069844
申请日：2016-11-28
Inventor： Yeong Min JANG , Van Trang NGUYEN , Chang Hyun HONG
IPC: H04B10/556 , H04B10/116
Abstract: A DSM-PSK optical wireless transmission method includes the steps of: receiving a binary data signal, allowing a modulator to convert the binary data signal into a global phase shift signal, generating a reference signal group including M number of pulse signals having the same period, the same duty ratio of d/M, mutually different phases, and a determined sequence, generating a data signal group including M number of pulse signals having a determined sequence, the pulse signals having been obtained by phase-shifting the reference signal group according to the global phase shift signal, flickering each light source of a reference light source group including M number of light sources having a determined sequence, according to each pulse signal of the reference signal group, and flickering each light source of a data light source group including M number of light sources having a determined sequence, according to each pulse signal of the data signal group.
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公开(公告)号：US20220337323A1
公开(公告)日：2022-10-20
申请号：US17625662
申请日：2019-11-28
Inventor： Yeong Min JANG , Van Thang NGUYEN , Minh Duc THIEU , Ngoc Nguyen HUY , Tung Lam PHAM
IPC: H04B10/556 , H04N7/22 , H04B10/67 , H04L1/00
Abstract: A method of modulating an optical camera communication (OCC) signal by an OCC transmission node in an OCC system includes acquiring a binary data signal, grouping the binary data signal for every k bits to convert the binary data signal into a global phase shift signal having an integer value from 0 to M−1 (=2k−1), generating a data signal group by mapping the global phase shift signal to first to Mth mapping sequences in the form of an n*M/2-bit sequence based on a preset symbol group mapping table, generating a pulse wave signal by modulating the data signal group, and blinking each of a plurality of light sources included in the OCC transmission node according to the pulse wave signal. Accordingly, performance of the communication system may be improved.
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3.发明申请公开(公告)号：US20200235813A1
公开(公告)日：2020-07-23
申请号：US16697285
申请日：2019-11-27
Inventor： Yeong Min JANG , Thieu Minh Duc
IPC: H04B10/116 , H04B10/114 , H04B10/50 , H04B10/556 , H04B10/67
Abstract: Provided are a communication method and apparatus using a hybrid modulation scheme in a communication system. The communication node uses a hybrid modulation scheme in the communication system and includes a processor, a first light-emitting diode (LED) array configured to transmit a first signal by blinking a first LED set according to control of the processor, a second LED array configured to transmit a second signal by blinking a second LED set according to control of the processor, and a memory configured to store one or more instructions executed by the processor. Therefore, performance of the communication system can be improved.
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公开(公告)号：US20220210352A1
公开(公告)日：2022-06-30
申请号：US17562712
申请日：2021-12-27
Inventor： Yeong Min JANG , AHMED MD FAISAL
IPC: H04N5/353 , H04B10/116
Abstract: An optical communication-based image processing system is disclosed. The system may include a transmitter having at least one light emitting element and a receiver having a rolling shutter camera. As the system is provided, a rolling shutter effect may be improved.
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Patent Agency Ranking
公开(公告)号：US20190356385A1
公开(公告)日：2019-11-21
申请号：US16069822
申请日：2016-11-28
Inventor： Yeong Min JANG , Van Trang NGUYEN , Chang Hyun HONG
IPC: H04B10/116 , H04B10/556 , H04B10/67 , H04N7/22
Abstract: An optical wireless communication apparatus includes: a modulator for generating a reference signal including periodically repeating binary zeros and ones, receiving an input of a first binary data signal, and outputting a second binary data signal, wherein the second binary data signal has the same frequency as the reference signal, and has the same phase as the reference signal when the first binary data signal comprises binary zeros and has an opposite phase to the reference signal when the first binary data signal comprises binary ones, or has the same phase as the reference signal when the first binary data signal comprises binary ones and has an opposite phase to the reference signal when the first binary data signal comprises binary zeros, and a transmitter for turning a first light source on or off according to the reference signal, and turning a second light source on or off according to the second binary data signal.
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公开(公告)号：US20230045732A1
公开(公告)日：2023-02-09
申请号：US17564890
申请日：2021-12-29
Inventor： Yeong Min JANG , Utama Ida BAGUS KRISHNA YOGA , Ahmed Md. FAISAL
IPC: G06T7/73
Abstract: This application relates to a battery test apparatus and an operating method thereof to check whether the direction of battery cells provided inside a battery tray is correct by implementing a computer vision AI algorithm. In one aspect, the method includes performing a first test for checking whether a battery tray has been correctly aligned with the battery test apparatus. The method may also include capturing a battery tray image including a plurality of battery cells using a camera upon alignment of the battery tray. The method may further include obtaining related information on battery cells from the battery tray image, and loading the related information on the battery cells. The method may further include performing a second test for checking whether directions of the battery cells are correct.
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7.发明申请公开(公告)号：US20220166508A1
公开(公告)日：2022-05-26
申请号：US17535058
申请日：2021-11-24
Inventor： Yeong Min JANG , AHMED MD FAISAL
IPC: H04B10/116 , G08C23/04 , H04N5/235 , H04B10/50 , A61B5/00
Abstract: An optical communication system is disclosed. The present system includes a light emitting element array for optically transmitting bio-data of a person to be diagnosed, and an optical receiver for recognizing color of the light emitting element array by using an image sensor to acquire the bio-data of the person to be diagnosed. Accordingly, an untact diagnostic test may be performed.
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公开(公告)号：US20200252131A1
公开(公告)日：2020-08-06
申请号：US16494687
申请日：2017-12-31
Inventor： Yeong Min JANG , Van Trang NGUYEN
IPC: H04B10/516 , H04B10/67 , H04B10/50
Abstract: An optical wireless transmission device according to an embodiment of the present invention comprises: a modulation unit for receiving input of a first input signal and outputting a first output signal; and a light source control unit for controlling a first light source in accordance with the first output signal. The first output signal repeats “0” and “1” in a first phase during clock time if a binary value of the first input signal is 0, and repeats “0” and “1” in a phase opposite from the first phase during the clock time if a binary value of the first input signal is 1.
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9.发明申请公开(公告)号：US20180159624A1
公开(公告)日：2018-06-07
申请号：US15551561
申请日：2016-01-15
Inventor： Yeong Min JANG , Van Nguyen TRANG , Chang Hyun HONG
IPC: H04B10/116 , H04B10/556 , H04N5/353 , H04B10/67
CPC classification number: H04B10/116 , H04B10/5563 , H04B10/676 , H04N5/3532
Abstract: The present invention relates to an image sensor communication (ISC) system and method for enabling communication between an LED and a rolling shutter camera using a rolling shutter modulation method. The image sensor communication system according to an embodiment of the present invention comprises: a coding unit for coding transmission data to be transmitted; an LED which is turned on/off according to the transmission data coded in the coding unit; a rolling shutter camera for continuously photographing, at each of a plurality of rows in a rolling shutter manner, on/off images according to the on/off of the LED; an image processing unit for generating brightness signals according to brightness values of the on/off images of the LED photographed at each of the plurality of rows by the rolling shutter camera; and a data extraction unit for extracting the transmission data from the brightness signals of the on/off images of the LED generated by the image processing unit.
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