Patents by Inventor Jong Hoi Kim

Jong Hoi Kim 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).

  • Publication number: 20160336368
    Abstract: There is provided a receiver optical module including a photodetector having a plurality of channels, a capacitor disposing block formed on an upper portion of the photodetector, a plurality of capacitors formed on the capacitor disposing block, and an electrical wiring configured to connect the plurality of capacitors to electrodes of a plurality of channels of the photodetector, wherein the plurality of capacitors are formed on the capacitor disposing block such that distance between the capacitors and the electrodes of the corresponding channels are the same. Distortion and loss of signal characteristics of high frequency can be reduced and quality of a signal can be enhanced.
    Type: Application
    Filed: April 20, 2016
    Publication date: November 17, 2016
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seo Young LEE, Young Tak HAN, Jong Hoi KIM, Joong Seon CHOE, Chun Ju YOUN, Hyun Do JUNG
  • Publication number: 20160330838
    Abstract: A display apparatus includes: a display panel; a chassis including a flat part and an inclined part that extends from a side border of the flat part and is inclined with respect to the flat part; at least one printed circuit board (PCB) disposed on the chassis; and a plurality of light sources arranged on the at least one PCB and configured to emit light toward the display panel, wherein at least one light source of the plurality of light sources is arranged at a position corresponding to the inclined part of the chassis.
    Type: Application
    Filed: May 9, 2016
    Publication date: November 10, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Cheon Ho PARK, Jong-Hoi KIM, Han Mi CHOI
  • Publication number: 20160282670
    Abstract: A display device having a structure capable of improving brightness “Mura” and color “Mura” that may be generated in a direct type backlight unit has a structure in which a plurality of light sources are arranged in a pattern similar to a square arrangement along the edges of the backlight unit, and in a pattern similar to a triangle arrangement within an intermediate region of the backlight unit, and a connector for connecting a cable disposed on a Printed Circuit Board (PCB) is disposed on the rear side of the PCB such that the connector does not influence “Mura” of the backlight unit.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong Pil JEON, Suk-Ju CHOI, Jong-Hoi KIM, Yong-Hun KWON, Kun Ho CHO
  • Publication number: 20160161089
    Abstract: A white light emitting device, including a circuit board; a plurality of light sources mounted on the circuit board, each light source of the plurality of light sources configured to emit monochromatic light; a light converter spaced apart from the circuit board, the light converter configured to convert the monochromatic light emitted from the light sources to white light; and a compensator provided between the circuit board and the light converter, the compensator configured to convert the emitted monochromatic light to white light.
    Type: Application
    Filed: December 3, 2015
    Publication date: June 9, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong Pil JEON, Jong-hoi KIM, Kye Hoon LEE, Dae-hee LEE, Byoung-jin CHO, Suk-ju CHOI
  • Patent number: 9270381
    Abstract: Disclosed are a method and an apparatus for transmitting and receiving coherent optical OFDM.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: February 23, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chun Ju Youn, Yong-Hwan Kwon, Duk Jun Kim, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi, Eun Soo Nam
  • Patent number: 9166680
    Abstract: Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: October 20, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chun Ju Youn, Jong-Hoi Kim, Joong-Seon Choe, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam
  • Patent number: 9077453
    Abstract: Provide an optical receiver module. The optical receiver module includes: an optical fiber array including a first optical fiber that delivers an optical signal and a second optical fiber that delivers a reference optical signal; a plate optical integrated circuit including first and second multi mode interference (MMI) optical isolators respectively receiving the optical signal and the reference optical signal through a plurality of first optical waveguides; and an optical detector array receiving two optical signals from each of the first and second MMI optical isolators through a plurality of second optical waveguides, wherein the optical detector array includes a plurality of third optical waveguides aligned to be connected to the other end of each of the plurality of second optical waveguides in one-to-one correspondence.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 7, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Jong-Hoi Kim
  • Patent number: 9031421
    Abstract: Provided is a method of measuring signal transmission time difference of a measuring device. The measuring device according to embodiments, by measuring a skew on two optical paths through signal delays of sufficient sizes for skew measurement on the optical paths, even a skew having a minute size can be measured within a measurable range.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: May 12, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Joong-Seon Choe, Chun Ju Youn, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Kwang-Seong Choi, Eun Soo Nam
  • Publication number: 20150116852
    Abstract: A display apparatus includes a display main body having a screen and a bezel that surrounds the screen, and a bezel hiding member mounted on the bezel to cover the bezel. The bezel hiding member includes a body portion configured to refract an image light that emitted from an edge region of the screen, and a plurality of prism projections formed to project from the body portion to change a path of the refracted image light to a front side of the display main body.
    Type: Application
    Filed: March 28, 2014
    Publication date: April 30, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong-hoi KIM, Kun-ho CHO, Yong-hun KWON, Yae-kyung SON, Young-min LEE, Suk-ju CHOI
  • Patent number: 8929731
    Abstract: An apparatus for measuring performance of a coherent optical receiver includes a beam splitter splitting light into first and second paths, a first optical modulator modulating the first path light, a variable optical attenuator controlling an optical power of the first optical modulator, a first polarization controller transmitting a signal controlling polarization of an output of the variable optical attenuator to the coherent optical receiver, a second optical modulator modulating the second path light, a variable optical delay line delaying time of an output of the second optical modulator, a second polarization controller transmitting a signal controlling polarization of an output of the variable optical delay line to the coherent optical receiver, a network analyzer measuring performance of the coherent optical receiver and controlling the optical modulators, and a controller transmitting a control signal to the optical modulators.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: January 6, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chun Ju Youn, Joong-Seon Choe, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam
  • Patent number: 8905555
    Abstract: An image projection apparatus is provided, which includes an illumination unit which generates illumination light, a first prism which receives the illumination light from the illumination unit and performs total reflection of the illumination light, a reflection mirror which receives the illumination light from the first prism and reflects the illumination light, an image forming unit which forms an image from the illumination light that is reflected from the reflection mirror, and a second prism which performs total reflection of the image that is formed by the image forming unit toward a screen.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: December 9, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wook-jae Jeon, Jong-hoi Kim
  • Publication number: 20140354914
    Abstract: An illuminating apparatus includes a support member comprising a light source support member having four corner areas; and a light emitter that is disposed on a surface of the light source support member, the light emitter including one or more light emitting modules, wherein each of the light emitting module comprises a strip-shaped printed circuit board (PCB) mounted on the light source support member and a plurality of light source packages that is mounted on the strip-shaped PCB and generates light; and four corner side extending portions that configure a portion of any one of one or more the light emitting modules and are extended toward the four corner areas of the light source support member.
    Type: Application
    Filed: February 4, 2014
    Publication date: December 4, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-min LEE, Kye-hoon LEE, Yong-hun KWON, Jong-hoi KIM, Kun-ho CHO, Suk-ju CHOI
  • Publication number: 20140205280
    Abstract: Provided is a method of measuring signal transmission time difference of a measuring device. The measuring device according to embodiments, by measuring a skew on two optical paths through signal delays of sufficient sizes for skew measurement on the optical paths, even a skew having a minute size can be measured within a measureable range.
    Type: Application
    Filed: July 3, 2013
    Publication date: July 24, 2014
    Inventors: Joong-Seon CHOE, Chun Ju YOUN, Jong-Hoi KIM, Duk Jun KIM, Yong-Hwan KWON, Kwang-Seong CHOI, Eun Soo NAM
  • Publication number: 20140169786
    Abstract: Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.
    Type: Application
    Filed: September 16, 2013
    Publication date: June 19, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Chun Ju YOUN, Jong-Hoi KIM, Joong-Seon CHOE, Duk Jun KIM, Yong-Hwan KWON, Eun Soo NAM
  • Publication number: 20140147131
    Abstract: Provide an optical receiver module. The optical receiver module includes: an optical fiber array including a first optical fiber that delivers an optical signal and a second optical fiber that delivers a reference optical signal; a plate optical integrated circuit including first and second multi mode interference (MMI) optical isolators respectively receiving the optical signal and the reference optical signal through a plurality of first optical waveguides; and an optical detector array receiving two optical signals from each of the first and second MMI optical isolators through a plurality of second optical waveguides, wherein the optical detector array includes a plurality of third optical waveguides aligned to be connected to the other end of each of the plurality of second optical waveguides in one-to-one correspondence.
    Type: Application
    Filed: March 15, 2013
    Publication date: May 29, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventor: Jong-Hoi KIM
  • Patent number: 8693459
    Abstract: Provided is a polarization division multiplexed optical OFDM transmitter. The polarization division multiplexed optical OFDM transmitter includes a data demultiplexer, a training symbol generation unit and an optical up-converter and polarization division multiplexing unit. The data demultiplexer divides a transmission signal into a plurality of groups. The training symbol generation unit allocates a plurality of training symbols for each OFDM data which is included in the respective multiplexed groups, and allocates repetitive data in a time domain for the respective training symbols for data of 0 to periodically appear for the respective training symbols in a frequency domain. The optical up-converter and polarization division multiplexing unit performs optical frequency band conversion and polarization division multiplexing on an output of the training symbol generation unit to output a polarization division multiplexed optical OFDM signal corresponding to a plurality of polarization components.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: April 8, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chun Ju Youn, Yong-Hwan Kwon, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi, Kyoungwoo Heo, Eun Soo Nam
  • Patent number: 8672485
    Abstract: An illuminating unit and a display apparatus including the illuminating unit are provided. The illuminating unit generates and emits light to a display element of the display apparatus, and includes a light source; a uniformizing unit which uniformizes light from the light source and includes a plurality of uniformizing lenses arranged on an optical path; a condensing unit which condenses light from the uniformizing unit to emit the light to the display element and includes a plurality of condensing lenses sequentially arranged on the optical path, and the uniformizing unit and the condensing unit are arranged based on a width of one of a plurality of cell lenses forming the uniformizing lens and a width of an image displayed in the display element.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: March 18, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kee-uk Jeon, Sung-tae Kim, Jeong-ho Nho, Won-yong Lee, Kyoung-choul Jang, Seok-chan Hong, Jong-hoi Kim
  • Publication number: 20130308949
    Abstract: Provided is an optical OFDM receiver. The optical OFDM receiver receives an optical signal dependent on the nonlinearity of a transmitter. The optical OFDM receives includes an optical down converter, a nonlinearity compensator, and an OFDM demodulator. The optical down converter converts the optical signal into an electrical signal. The nonlinearity compensator filters the electrical signal, for compensating distortion which is added to the optical signal when the transmitter performs optical modulation. The OFDM demodulator demodulates the distortion-compensated electrical signal in an OFDM scheme.
    Type: Application
    Filed: July 25, 2013
    Publication date: November 21, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chun Ju YOUN, Yong-Hwan KWON, Eun Soo NAM, Jong-Hoi KIM, Joong-Seon CHOE, Kwang-Seong CHOI
  • Patent number: 8521040
    Abstract: Provided is an optical OFDM receiver. The optical OFDM receiver receives an optical signal dependent on the nonlinearity of a transmitter. The optical OFDM receives includes an optical down converter, a nonlinearity compensator, and an OFDM demodulator. The optical down converter converts the optical signal into an electrical signal. The nonlinearity compensator filters the electrical signal, for compensating distortion which is added to the optical signal when the transmitter performs optical modulation. The OFDM demodulator demodulates the distortion-compensated electrical signal in an OFDM scheme.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: August 27, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chun Ju Youn, Yong-Hwan Kwon, Eun Soo Nam, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi
  • Publication number: 20130156362
    Abstract: Provided is a core which reduces optic splice loss between discontinuous optical waveguides.
    Type: Application
    Filed: September 12, 2012
    Publication date: June 20, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Duk Jun KIM, Jong-Hoi Kim, Joong-Seon Choe, Chun Ju Youn, Kwang-Seong Choi, Yong-Hwan Kwon, Eun Soo Nam