Patents by Inventor Jae Joon Chang

Jae Joon Chang 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).

  • Patent number: 11388005
    Abstract: Provided is a connected gateway server system for real-time vehicle control service that includes a vehicle terminal mounted on at least one vehicle; a gateway server relaying communication with the vehicle terminal; a connected gateway server for controlling a vehicle and acquiring a vehicle information in the form of REST API for each user through communication with the vehicle terminal, delivering a control command, a response information, and the vehicle information to the user's platform that has been validated as an API form, storing a terminal connection state information, an API authentication information, the vehicle information, and a user information, and performing a confirmation of update state and an update request of vehicle terminal; and an user platform for verifying validity in an API token manner through communication with the connected gateway server, fetching a necessary vehicle information in the API form or issuing the control command of vehicle.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: July 12, 2022
    Assignee: Digiparts, Inc.
    Inventors: Hyuk Joon Woo, Sung Ill Jung, Jae Won Chang
  • Publication number: 20220010130
    Abstract: The present disclosure relates to a light transmissive molded article including a base layer molded from a thermoplastic resin composition and a coating layer formed on at least one surface of the base layer, wherein peak energy PEA is equal to or greater than 40 J when impact energy of 140 J is applied with a rod having a diameter of 12.7 mm and a thickness of 3.0 mm by ASTM D3763, wherein, when being exposed at 90° C. for 500 hours, a color difference ?E1 based on color coordinates (L*0, a*0, b*0) of a CIE LAB color space before the exposure and color coordinates (L*A, a*A, b*A) of the CIE LAB color space after the exposure satisfies Equation 1 below, and light transmittance T0 before the exposure and light transmittance TA after the exposure satisfy Equation 2 below: ?E1?2.0??[Equation 1] 0.95?TA/T0?1.05.
    Type: Application
    Filed: July 6, 2021
    Publication date: January 13, 2022
    Applicants: HYUNDAI MOBIS CO., LTD., LG CHEM, LTD.
    Inventors: Jae Joon CHANG, Moo Seok LEE, Myeung Il KIM, Soo Min LEE, Young Min KIM
  • Patent number: 10982091
    Abstract: The present invention relates to a thermoplastic resin composition having excellent thermal stability and birefringence properties and to a molded article formed therefrom. In one embodiment, the thermoplastic resin composition includes: 100 parts by weight of a polycarbonate resin including a repeating unit represented by formula 1; about 0.2 parts by weight to about 15 parts by weight of an epoxy resin represented by formula 2; and about 1 part by weight to about 15 parts by weight of a phosphate-based compound, wherein formula 1 and formula 2 are as defined in the detailed description.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: April 20, 2021
    Assignees: HYUNDAI MOBIS CO., LTD., SAMYANG CORPORATION
    Inventors: Jae Joon Chang, Joung Hoon Lee, Hyun Jee Lee, Keun Hyung Lee, Jung Kyu Han, Tae Jin An, Nung Hyun Kim, Hyung Jin Roh
  • Publication number: 20210040313
    Abstract: The present disclosure relates to a polycarbonate resin composition having excellent light-reflecting and light-shielding properties, and an automotive molded article produced using the same. The polycarbonate resin composition includes: 60 to 70 wt % of a polycarbonate resin; 4 to 10 wt % of a rubber-modified vinyl-based graft copolymer; 3 to 11 wt % of a styrene-based copolymer; 15 to 25 wt % of titanium dioxide; and 2 to 3 wt % of a mineral filler.
    Type: Application
    Filed: August 4, 2020
    Publication date: February 11, 2021
    Inventors: Jae Joon CHANG, Myeung Il KIM, Jae Hwan KIM, Jin Sol PARK, Soo Min LEE
  • Publication number: 20190055401
    Abstract: The present invention relates to a thermoplastic resin composition having excellent thermal stability and birefringence properties and to a molded article formed therefrom. In one embodiment, the thermoplastic resin composition includes: 100 parts by weight of a polycarbonate resin including a repeating unit represented by formula 1; about 0.2 parts by weight to about 15 parts by weight of an epoxy resin represented by formula 2; and about 1 part by weight to about 15 parts by weight of a phosphate-based compound, wherein formula 1 and formula 2 are as defined in the detailed description.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 21, 2019
    Inventors: Jae Joon CHANG, Joung Hoon LEE, Hyun Jee LEE, Keun Hyung LEE, Jung Kyu HAN, Tae Jin AN, Nung Hyun KIM, Hyung Jin ROH
  • Publication number: 20150159013
    Abstract: A thermoplastic polycarbonate resin composition may include about 50 to about 70 wt % of a polycarbonate resin; about 5 to about 20 wt % of a vinyl cyanide compound-conjugated diene-vinyl aromatic hydrocarbon copolymer; about 10 to about 30 wt % of a polyester resin; about 3 to about 15 wt % of a maleimide-based copolymer; about 2 to about 10 wt % of an impact modifier; and about 0.1 to about 1.0 wt % of a nucleating agent, wherein the polycarbonate resin has a melt index of about 2 to about 20 g/10 min (300° C., 2.16 kg). The thermoplastic polycarbonate resin composition has excellent chemical resistance and mechanical properties.
    Type: Application
    Filed: July 2, 2014
    Publication date: June 11, 2015
    Inventors: Jae Joon Chang, Hyeon Don Kim, Yong Chun, Myeung Il Kim, Jong Kuk Choi, Yong Kim, Sung Ho Lee, Dae Yong Ok
  • Patent number: 9045633
    Abstract: A thermoplastic polycarbonate resin composition may include about 50 to about 70 wt % of a polycarbonate resin; about 5 to about 20 wt % of a vinyl cyanide compound-conjugated diene-vinyl aromatic hydrocarbon copolymer; about 10 to about 30 wt % of a polyester resin; about 3 to about 15 wt % of a maleimide-based copolymer; about 2 to about 10 wt % of an impact modifier; and about 0.1 to about 1.0 wt % of a nucleating agent, wherein the polycarbonate resin has a melt index of about 2 to about 20 g/10 min (300° C., 2.16 kg). The thermoplastic polycarbonate resin composition has excellent chemical resistance and mechanical properties.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: June 2, 2015
    Assignees: Hyundai Mobis Co., Ltd., LG Chem. Ltd.
    Inventors: Jae Joon Chang, Hyeon Don Kim, Yong Chun, Myeung Il Kim, Jong Kuk Choi, Yong Kim, Sung Ho Lee, Dae Yong Ok
  • Patent number: 8674486
    Abstract: Systems and methods pertaining to a digital signal isolator device are described. In one embodiment, the device includes an isolation barrier and two metal support paddles. The isolation barrier contains an organic and/or a semi-organic insulating material with at least one capacitor embedded inside. One of the two metal support paddles is located below a first portion of a bottom surface of the isolation barrier to provide support to the isolation barrier, while the other metal support paddle is located below a second portion of a bottom surface of the isolation barrier to provide support to the isolation barrier.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: March 18, 2014
    Assignee: Samsung Electro-Mechanics
    Inventors: Geoffrey T Haigh, Matthew Kuhn, Patrick Melet, Romain Pelard, Jae Joon Chang, Youngsik Hur
  • Publication number: 20130170840
    Abstract: A communication system includes a hybrid signal transmitter incorporating a signal routing circuit and a driver circuit. The signal routing circuit is configured to receive a first input signal and route the first input signal through a first signal path when the frequency bandwidth of the input signal is lower than a threshold frequency and through a second signal path when the frequency bandwidth exceeds the threshold frequency. The second signal path includes a frequency down-converter circuit. The driver circuit is configured to receive the routed input signal via the first signal path or the second signal path, and convert the routed input signal into an optical signal for coupling into an optical fiber.
    Type: Application
    Filed: July 27, 2012
    Publication date: July 4, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY, LTD.
    Inventors: Jae Joon Chang, Youngsik Hur
  • Publication number: 20130154071
    Abstract: Systems and methods pertaining to a digital signal isolator device are described. In one embodiment, the device includes an isolation barrier and two metal support paddles. The isolation barrier contains an organic and/or a semi-organic insulating material with at least one capacitor embedded inside. One of the two metal support paddles is located below a first portion of a bottom surface of the isolation barrier to provide support to the isolation barrier, while the other metal support paddle is located below a second portion of a bottom surface of the isolation barrier to provide support to the isolation barrier.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 20, 2013
    Applicant: Samsung Electro-Mechanics Company, Ltd.
    Inventors: Geoffrey T. Haigh, Matthew Kuhn, Patrick Melet, Romain Pelard, Jae Joon Chang, Youngsik Hur
  • Patent number: 8378749
    Abstract: Systems and methods may include an amplifier having at least a first input port, where the amplifier includes a first capacitance associated with the first input port; a first bias circuit, where the first bias circuit comprises a series connection of a first charging circuit and a first discharging circuit, wherein a first node between the first charging circuit and the first discharging circuit is connected to the first input port, wherein responsive to an RF input signal having at least a first predetermined level being received at the first input port, the first charging circuit charges the first capacitance associated with the first input port during a first portion of a cycle of the RF input signal, and discharges the first capacitance associated with the first input port during a second portion of the cycle, thereby controlling a DC bias voltage level available at the first input port.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 19, 2013
    Assignee: Samsung Electro-Mechanics
    Inventors: Woonyun Kim, Jeonghu Han, Ki Seok Yang, Jae Joon Chang, Chang-Ho Lee
  • Publication number: 20130027135
    Abstract: Systems and methods may include an amplifier having at least a first input port, where the amplifier includes a first capacitance associated with the first input port; a first bias circuit, where the first bias circuit comprises a series connection of a first charging circuit and a first discharging circuit, wherein a first node between the first charging circuit and the first discharging circuit is connected to the first input port, wherein responsive to an RF input signal having at least a first predetermined level being received at the first input port, the first charging circuit charges the first capacitance associated with the first input port during a first portion of a cycle of the RF input signal, and discharges the first capacitance associated with the first input port during a second portion of the cycle, thereby controlling a DC bias voltage level available at the first input port.
    Type: Application
    Filed: July 29, 2011
    Publication date: January 31, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY
    Inventors: Woonyun Kim, Jeonghu Han, Ki Seok Yang, Jae Joon Chang, Chang-Ho Lee
  • Publication number: 20130029614
    Abstract: Systems, methods, and apparatuses may provide for antenna switch controllers. An example antenna switch controller may include: a plurality of antenna switches commonly connected to one or more antennas, where each of the plurality of antenna switches includes a plurality of stacked transistors, where one of the plurality of antenna switches is enabled when transmitting or receiving one or more radio frequency (RF) signals via the one or more antennas; a voltage generator that receives an external supply voltage from a battery, where the voltage generator generates an internal supply voltage, where the internal supply voltage remains constant despite fluctuations in the external supply voltage from the battery; a clock buffer that generates clock signals from the constant internal supply voltage; and a charge pump that receives the clock signals and generates a constant negative voltage, where the constant negative voltage is for biasing of one or more of the plurality of antenna switches that are disabled.
    Type: Application
    Filed: July 29, 2011
    Publication date: January 31, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY
    Inventors: Changhyuk Cho, Jeongwon Cha, Minsik Ahn, Chang-Ho Lee, Wyangmyong Woo, Jae Joon Chang
  • Publication number: 20130028600
    Abstract: A communication system includes a configurable transceiver that accommodates multi-band, multi-format signals by incorporating a duplex transceiver circuit, a simplex transceiver circuit and at least two switches. A first switch may be operated so as to configure the configurable transceiver to propagate duplex signals, such as for example, frequency division multiplexed (FDD) signals. The second switch may be operated so as to configure the simplex transceiver circuit to provide signal propagation of various types of signals in either a receive direction or a transmit direction. The various types of signals include time division multiplexed (TDD) signals.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY, LTD.
    Inventors: Jae Joon Chang, Youngsik Hur
  • Patent number: 8334708
    Abstract: Example driver circuits can utilize shared-charge recycling charge pump structures. In particular, an example shared-charge recycling process may be applied to a clock buffer and charge transfer cells of the charge pump in a driver circuit. An example recycling process may include recycling of shared charges between the capacitors/capacitances in the charge transfer cells. An example recycling process may use the charges in one or more capacitors to charge one or more other capacitors before the charges are wasted or otherwise discharged to ground. Such recycling may significantly reduce the power consumption of the charge pump while still providing a high output voltage level, according to an example embodiment of the invention.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: December 18, 2012
    Assignee: Samsung Electro-Mechanics
    Inventors: Jeongwon Cha, Taejoong Song, Changhyuk Cho, Minsik Ahn, Chang-Ho Lee, Wangmyong Woo, Jae Joon Chang
  • Patent number: 7218654
    Abstract: A method for calibrating a laser transmitter includes (a) detecting an eye diagram of an output from the laser transmitter, (b) determining if the eye diagram is acceptable, (c) if the eye diagram is not acceptable, changing a value of a control signal in the laser transmitter, wherein the control signal sets an amplitude characteristic of a limiting amplifier coupled to a laser driver in the laser transmitter, and (d) repeating steps (a), (b), and (c) until the eye diagram is acceptable.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: May 15, 2007
    Assignee: Avago Technologies Fiber IP (Singapore) Pte. Ltd.
    Inventors: Young Gon Kim, Jae Joon Chang, Myunghee Lee
  • Patent number: 7167491
    Abstract: A laser transmitter includes an input stage generating an input signal to a limiting amplifier, the limiting amplifier generating an input signal to a laser driver, and the laser driver generating an input signal to a light source. The limiting amplifier has a control terminal for receiving a control signal that sets an amplitude characteristic of the input signal to the laser driver. The amplitude characteristic may be a common-mode or a peak amplitude of the input signal to the laser driver.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: January 23, 2007
    Assignee: Avago Technologies Fiber IP (Singapore) Pte. Ltd.
    Inventors: Young Gon Kim, Jae Joon Chang, Myunghee Lee
  • Publication number: 20020070766
    Abstract: The present invention is a signal detect (SD)/loss-of-signal (LOS) circuit that is able to discern between received Signal and Noise in Digital Amplitude Modulated transmission systems. A window detector, having a low and high voltage limit, receives an input signal. A low pass filter having an output connects to the window detector. A differential comparator compares the output of the low pass filter at a negative input and a threshold voltage signal to generate an output signal indicative of the average power of the input signal.
    Type: Application
    Filed: December 11, 2000
    Publication date: June 13, 2002
    Inventors: Stefano G. Therisod, Jae Joon Chang, Myunghee Lee