Patents by Inventor Sang Kyu Lim
Sang Kyu Lim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8634725Abstract: A transmitting apparatus using visible light communication generates a light source control signal from color information representing additional information and transmits additional information with a color of light that is emitted by a light source by controlling an on/off time of a plurality of LEDs according to the light source control signal. Therefore, a user can intuitively know additional information from a color of light that is emitted by the light source.Type: GrantFiled: October 7, 2011Date of Patent: January 21, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Il-Soon Jang, Dae Ho Kim, Sang-Kyu Lim, You Jin Kim, Tae-Gyu Kang
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Publication number: 20140009083Abstract: Disclosed herein is an apparatus and method for controlling a fault in a lighting network The apparatus includes power selection units respectively provided in a plurality of lighting units connected to one another over a network, each power selection unit being configured to compare a reference voltage with an output voltage sensed from power supply signals input from power supply units respectively provided in a lighting unit, located ahead of a faulty lighting unit, and the faulty lighting unit if a fault occurs in the lighting unit, and to select supply power to be supplied to the faulty lighting unit. Lighting control units control driving of the faulty lighting unit using the selected supply power.Type: ApplicationFiled: March 18, 2013Publication date: January 9, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: Seong-Hee PARK, Tae-Gyu KANG, In-Su KIM, Sang-Kyu LIM, You-Jin KIM, Il-Soon JANG, Dae-Ho KIM, Jin-Doo JEONG, Hyun-Jong KIM
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Publication number: 20140010540Abstract: Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining whether a current location is the start of a symbol of a transmission signal, setting a sample index, a signal accumulated value for an accumulation region of a front half portion of the symbol, and a signal accumulated value for an accumulation region of a rear half portion of the symbol, determining whether the sample index belongs to an accumulation region of the front or rear half portion of the symbol, and accumulating samples of the transmission signal in accordance with the location to which the sample index belongs, determining whether a current location corresponds to the end of the symbol, and outputting a Variable Pulse Position Modulation (VPPM) communication signal corresponding to the transmission signal.Type: ApplicationFiled: June 17, 2013Publication date: January 9, 2014Inventors: Jin-Doo JEONG, Tae-Gyu KANG, Sang-Kyu LIM, Il-Soon JANG, Dae-Ho KIM, You-Jin KIM, Seong-Hee PARK, In-Su KIM, Hyun-Jong KIM
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Patent number: 8620165Abstract: 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.Type: GrantFiled: March 14, 2013Date of Patent: December 31, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Dae-Ho Kim, Sang-Kyu Lim, Il-Soon Jang, Tae-Gyu Kang
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Publication number: 20130343768Abstract: The present invention relates to an inter-vehicle communication apparatus and method using visible light communication. The inter-vehicle communication apparatus using visible light communication includes a spreading code application unit for applying a spreading code to transmission data desired to be transmitted, and a transmission unit for generating a transmission frame based on the transmission data to which the spreading code is applied, and transmitting the transmission frame via a lighting lamp of a vehicle. The transmission frame includes a preamble field required to synchronize the transmission frame, a data field required to transmit the transmission data, and a position field required to provide hopping information of the transmission data.Type: ApplicationFiled: June 12, 2013Publication date: December 26, 2013Inventors: Il-Soon JANG, Tae-Gyu KANG, Sang-Kyu LIM, Dae-Ho KIM, Jin-Doo JEONG, You-Jin KIM, Hyun-Jong KIM, Seong-Hee PARK, In-Su KIM
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Patent number: 8542368Abstract: 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.Type: GrantFiled: December 2, 2011Date of Patent: September 24, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Dae Ho Kim, Tae-Gyu Kang, Sang-Kyu Lim, Il-Soon Jang, You Jin Kim
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Publication number: 20130234607Abstract: Disclosed herein is an LED lighting control apparatus and method based on visible light communication. The LED lighting control apparatus includes lighting information collection means for collecting status information about lighting means and environmental information about surroundings of the lighting means, and transmitting the collected information to lighting control means.Type: ApplicationFiled: March 11, 2013Publication date: September 12, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: You-Jin KIM, Tae-Gyu KANG, Hyun-Jong KIM, In-Su KIM, Dae-Ho KIM, Il-Soon JANG, Jin-Doo JEONG, Sang-Kyu LIM, Seong-Hee PARK
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Patent number: 8447189Abstract: 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.Type: GrantFiled: September 16, 2010Date of Patent: May 21, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Dae-Ho Kim, Sang-Kyu Lim, Il-Soon Jang, Tae-Gyu Kang
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Patent number: 8417122Abstract: 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.Type: GrantFiled: July 29, 2010Date of Patent: April 9, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Dae-Ho Kim, Tae-Gyu Kang, Sang-Kyu Lim, Il-Soon Jang
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Patent number: 8391720Abstract: 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.Type: GrantFiled: July 29, 2010Date of Patent: March 5, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Il-Soon Jang, Dae-Ho Kim, Sang-Kyu Lim, Tae-Gyu Kang
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Publication number: 20130004183Abstract: 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.Type: ApplicationFiled: September 11, 2012Publication date: January 3, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Dae-Ho KIM, Sang-Kyu LIM, Tae-Gyu KANG
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Publication number: 20130004182Abstract: 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.Type: ApplicationFiled: March 22, 2012Publication date: January 3, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Dae-Ho KIM, Tae-Gyu KANG, Sang-Kyu LIM, Il-Soon JANG, You-Jin KIM
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Publication number: 20130004184Abstract: 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.Type: ApplicationFiled: September 11, 2012Publication date: January 3, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Dae-Ho KIM, Sang-Kyu LIM, Tae-Gyu KANG
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Publication number: 20120157159Abstract: A communication apparatus using an image sensor captures an image including a light signal transmitted from a transmission apparatus that includes a transmission light source, and obtains data from the captured image. In a case that a reception error rate generated by the obtained data is changed, a cause of the change of the error rate is measured, and at least one of a zooming operation and a focusing operation is performed depending on the measured result, thereby correcting the error.Type: ApplicationFiled: December 15, 2011Publication date: June 21, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Dae Ho Kim, Sang-Kyu Lim, You Jin Kim, Tae-Gyu Kang
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Publication number: 20120154824Abstract: 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.Type: ApplicationFiled: December 2, 2011Publication date: June 21, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Dae Ho KIM, Tae-Gyu Kang, Sang-Kyu Lim, Il-Soon Jang, You Jin Kim
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Publication number: 20120155889Abstract: A transmitting apparatus using visible light communication generates transmission data into a two-dimensional data code according to a predetermined code method between the transmitting apparatus and a receiving apparatus and transmits the two-dimensional data code through a plurality of light emitting diodes (LED) that are arranged in a two-dimensional form. Therefore, the receiving apparatus senses light from a plurality of LEDs as an image using an image sensor, demodulates the image into a two-dimensional data code, decodes the two-dimensional data code using a code book, and restores data.Type: ApplicationFiled: December 12, 2011Publication date: June 21, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: You Jin KIM, Tae-Gyu KANG, Sang-Kyu LIM, Dae Ho KIM, Il-Soon JANG
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Publication number: 20120103955Abstract: According to example embodiments, a laser optical system includes a laser generator, at least one scan module, an objective lens, a relay lens, a review optical system, and a control device. The laser generator is configured to generate a laser beam. The at least one scan module is configured to reflect the laser beam generated by the laser generator and to direct the laser beam in different directions. The objective lens is configured to focus the laser beam on a substrate. The relay lens is configured to guide the laser beam scanned by the at least one scan module to within an incident range of the objective lens. The review optical system is configured to monitor, in real time, repair of the substrate using the laser beam. The control device is configured to control the at least one scan module.Type: ApplicationFiled: October 24, 2011Publication date: May 3, 2012Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jeong Woo Hyun, Jung Sub Lee, Sung Jin Lee, Sang Kyu Lim, Kwang Soo Kim, Jae Kwang Lee
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Publication number: 20120087677Abstract: A transmitting apparatus using visible light communication generates a light source control signal from color information representing additional information and transmits additional information with a color of light that is emitted by a light source by controlling an on/off time of a plurality of LEDs according to the light source control signal. Therefore, a user can intuitively know additional information from a color of light that is emitted by the light source.Type: ApplicationFiled: October 7, 2011Publication date: April 12, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Il-Soon JANG, Dae Ho KIM, Sang-Kyu LIM, You Jin KIM, Tae-Gyu KANG
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Publication number: 20120087676Abstract: An apparatus for transmitting data for visible light communication sets up the pulse width control step of pulse width modulation (PWM) in a unit time interval, modulates each symbol of VLC source data input into a PWM signal in accordance with the pulse width control step, generates a visible light modulation signal by controlling the turn-on time or turn-off time of a plurality of light emitting diodes (LEDs) in response to the PWM signal, and transmits the visible light modulation signal.Type: ApplicationFiled: October 7, 2011Publication date: April 12, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang-Kyu Lim, Il-Soon Jang, Dae Ho Kim, Yon Jin Kim, Tae-Gyu Kang
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Publication number: 20110069965Abstract: 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.Type: ApplicationFiled: September 16, 2010Publication date: March 24, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Dae-Ho KIM, Sang-Kyu Lim, Il-Soon Jang, Tae-Gyu Kang