Patents by Inventor Chang Jae Heo

Chang Jae Heo 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: 11249146
    Abstract: A circuit for monitoring an output voltage of a hall sensor includes an input port electrically connected to a first hall-sensor output terminal; an output port to output a monitoring voltage; a holder electrically connected to the input port to save the voltage of the input port; a first buffer including a first output terminal and first input terminal having an input impedance higher than an output impedance, having a voltage corresponding to a voltage of the first output terminal, and electrically connected to the holder; a second buffer including a second output terminal and second input terminal having an input impedance higher than an output impedance, having a voltage corresponding to a voltage of the second output terminal, and electrically connected to the input port; and an amplifier producing the monitoring voltage by amplifying a difference in voltages between the first output terminal and the second output terminal.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: February 15, 2022
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae Heo
  • Patent number: 11081952
    Abstract: An actuator driver for a voice coil motor (VCM) includes a digital converter configured to convert a VCM driving control code into a plurality of conversion codes including at least a first to nth conversion codes, during a predetermined period of time, a digital-to-analog converter configured to sequentially generate an analog signal according to each of the plurality of conversion codes during the predetermined time to actuate a VCM actuator to a target position, and a current amplifier configured amplify the analog signal to generate a driving signal and provide the driving signal to the VCM actuator, wherein the sequential generation of the analog signal includes increasing a level of the analog signal in response to one of the conversion codes and decreasing a level of the analog signal in response to another one of the conversion codes.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: August 3, 2021
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae Heo
  • Publication number: 20210173019
    Abstract: A circuit for monitoring an output voltage of a hall sensor includes an input port electrically connected to a first hall-sensor output terminal; an output port to output a monitoring voltage; a holder electrically connected to the input port to save the voltage of the input port; a first buffer including a first output terminal and first input terminal having an input impedance higher than an output impedance, having a voltage corresponding to a voltage of the first output terminal, and electrically connected to the holder; a second buffer including a second output terminal and second input terminal having an input impedance higher than an output impedance, having a voltage corresponding to a voltage of the second output terminal, and electrically connected to the input port; and an amplifier producing the monitoring voltage by amplifying a difference in voltages between the first output terminal and the second output terminal.
    Type: Application
    Filed: March 25, 2020
    Publication date: June 10, 2021
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae HEO
  • Patent number: 10444598
    Abstract: A camera module includes a housing having an internal space, a first moving body disposed in the internal space of the housing, a second moving body disposed in an internal space of the first moving body, a driving wire for OIS formed of a shape memory alloy, and having both ends connected to the housing and a central portion connected to the first moving body, and a driving wire for AF formed of a shape memory alloy, and having both ends connected to the first moving body and a central portion connected to the second moving body. The driving wire for OIS includes a pair of driving wires for OIS disposed opposing each other configured to move the first moving body in one axis direction, and the driving wire for AF includes a pair of the driving wires for AF disposed on one side surface among internal surfaces of the first moving body spaced apart from each other upwardly and downwardly configured to move the second moving body in an upward direction and a downward direction.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: October 15, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae Heo
  • Patent number: 10447932
    Abstract: A driving apparatus for a voice coil motor includes a signal generator configured to generate a path signal determining a path of a driving current provided to the voice coil motor and a current signal determining a level of the driving current, a controller configured to generate a control signal by comparing a reference current determined by the current signal, with the driving current flowing in the voice coil motor, and a driving circuit unit including transistors connected to the voice coil motor, the transistors being configured to form the path of the driving current by performing a switching operation based on the path signal and the control signal.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: October 15, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae Heo
  • Patent number: 10356324
    Abstract: An actuator of a camera module includes a magnetic body, a driving coil disposed to face the magnetic body, and a driving apparatus including a driving circuit connected to the driving coil and selectively providing one of a first control signal and a second control signal to the driving circuit according to a driving mode. The driving apparatus compares a level of a control signal of a previous driving mode with a level of a control signal of a following driving mode upon the driving mode being switched.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: July 16, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kyung Rin Kim, Gyu Won Kim, Chang Jae Heo
  • Publication number: 20180352161
    Abstract: A driving apparatus for a voice coil motor includes a signal generator configured to generate a path signal determining a path of a driving current provided to the voice coil motor and a current signal determining a level of the driving current, a controller configured to generate a control signal by comparing a reference current determined by the current signal, with the driving current flowing in the voice coil motor, and a driving circuit unit including transistors connected to the voice coil motor, the transistors being configured to form the path of the driving current by performing a switching operation based on the path signal and the control signal.
    Type: Application
    Filed: November 9, 2017
    Publication date: December 6, 2018
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Chang Jae HEO
  • Publication number: 20180278850
    Abstract: An actuator of a camera module includes a magnetic body, a driving coil disposed to face the magnetic body, and a driving apparatus including a driving circuit connected to the driving coil and selectively providing one of a first control signal and a second control signal to the driving circuit according to a driving mode. The driving apparatus compares a level of a control signal of a previous driving mode with a level of a control signal of a following driving mode upon the driving mode being switched.
    Type: Application
    Filed: October 31, 2017
    Publication date: September 27, 2018
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Kyung Rin KIM, Gyu Won KIM, Chang Jae HEO
  • Patent number: 9991888
    Abstract: A driving circuit includes a first switching element operating in a turned-on state or a turned-off state depending on a control voltage; a second switching element operating complementarily to the first switching element depending on the control voltage; a constant voltage circuit unit turning on depending on a source-gate voltage of the first switching element to maintain a constant voltage; a current adjusting circuit operating in a turned-on state or a turned-off state depending on the control voltage, and adjusting an operating current flowing to a ground depending on a current control signal in the turned-on state of the current adjusting circuit; a current control circuit controlling the operating current by providing the current control signal to the current adjusting circuit in a turned-on state of the constant voltage circuit unit; and a signal transfer circuit providing the control voltage to a gate of the second switching element.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: June 5, 2018
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chang Jae Heo, Sung Man Pang
  • Publication number: 20180048222
    Abstract: An actuator driver for a voice coil motor (VCM) includes a digital converter configured to convert a VCM driving control code into a plurality of conversion codes including at least a first to nth conversion codes, during a predetermined period of time, a digital-to-analog converter configured to sequentially generate an analog signal according to each of the plurality of conversion codes during the predetermined time to actuate a VCM actuator to a target position, and a current amplifier configured amplify the analog signal to generate a driving signal and provide the driving signal to the VCM actuator, wherein the sequential generation of the analog signal includes increasing a level of the analog signal in response to one of the conversion codes and decreasing a level of the analog signal in response to another one of the conversion codes.
    Type: Application
    Filed: April 25, 2017
    Publication date: February 15, 2018
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Chang Jae HEO
  • Publication number: 20170187374
    Abstract: A driving circuit includes a first switching element operating in a turned-on state or a turned-off state depending on a control voltage; a second switching element operating complementarily to the first switching element depending on the control voltage; a constant voltage circuit unit turning on depending on a source-gate voltage of the first switching element to maintain a constant voltage; a current adjusting circuit operating in a turned-on state or a turned-off state depending on the control voltage, and adjusting an operating current flowing to a ground depending on a current control signal in the turned-on state of the current adjusting circuit; a current control circuit controlling the operating current by providing the current control signal to the current adjusting circuit in a turned-on state of the constant voltage circuit unit; and a signal transfer circuit providing the control voltage to a gate of the second switching element.
    Type: Application
    Filed: September 14, 2016
    Publication date: June 29, 2017
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Chang Jae HEO, Sung Man PANG
  • Patent number: 9484806
    Abstract: There is provided a driving apparatus for driving an interleaved power factor correction circuit including a first main switch and a second main switch performing a switching operation with a predetermined phase difference and a first auxiliary switch and a second auxiliary switch forming a transformation path for surplus power existing before an ON operation of the first main switch and a second main switch, respectively, including: an input unit obtaining an input signal; a current sensing unit obtaining information regarding a current of the interleaved power factor correction circuit; and an output unit outputting a first control signal with respect to the first main switch, a third control signal with respect to the second main switch, a second control signal with respect to the first auxiliary switch, and a fourth control signal with respect to the second auxiliary switch, based on the input signal and the current information.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 1, 2016
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: In Wha Jeong, Chang Jae Heo, Bum Seok Suh
  • Patent number: 9312749
    Abstract: There is provided a driver device for a power factor correction circuit including first and second main switches that are switched on and off with a phase difference therebetween, and first and second auxiliary switches that provide conduction paths of surplus voltage in the first and second main switches before the first and second main switches are switched on, the driver device including: an input unit receiving a plurality of input signals; and an output unit outputting a first control signal for the first main switch, a second control signal for the second main switch, a third control signal for the first auxiliary switch, and a fourth control signal for the second auxiliary switch based on a plurality of input signals.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: April 12, 2016
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: In Wha Jeong, Chang Jae Heo, Bum Seok Suh, Jae Hyun Lim
  • Patent number: 9148062
    Abstract: There are provided a power factor correction apparatus capable of driving a main switch and an auxiliary switch using a single driving signal, and a power supplying apparatus and a motor driving apparatus having the same, the power factor correction apparatus including: a power factor correction unit having a main switch switching input power to correct a power factor of the input power and an auxiliary switch turned on before the main switch is turned on to form a transfer path for surplus power; and a control unit controlling operations of the main switch and the auxiliary switch based on a single input signal.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: September 29, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Chang Jae Heo
  • Publication number: 20150236692
    Abstract: There are provided a driving signal generating circuit and a power semiconductor device driving apparatus including the same. The driving signal generating circuit for generating driving signals provided to first and second transistors driving a power semiconductor device includes: a first driving signal generating unit generating a first driving signal including a high level signal and a low level signal and providing the first driving signal to a gate of the first transistor; a detecting unit detecting a detection voltage depending on a current flowing in the power semiconductor device; a second driving signal generating unit generating a second driving signal in inverse proportion to the detection voltage; and a switching unit performing a switching operation depending on the first driving signal to transfer the second driving signal to a gate of the second transistor.
    Type: Application
    Filed: May 2, 2014
    Publication date: August 20, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Chang Jae HEO
  • Patent number: 9059648
    Abstract: There are provided a driving circuit, a driving module, a motor driving apparatus capable of adjusting a driving current driving a power semiconductor device, the driving circuit including a driving unit including a plurality of drivers and selecting a corresponding driver among the plurality of drivers according to a selection signal to determine a current level of a driving signal for driving a semiconductor device, a timing controlling unit detecting a phase shift time of the driving signal transferred to the semiconductor device and comparing the detected time with a preset reference time to control the phase shift time of the driving signal, and a driving controlling unit providing the selection signal for selecting a driver to be driven among the plurality of drivers of the driving unit according a control signal from the outside and a timing control signal of the timing controlling unit.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: June 16, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chang Jae Heo, Sung Man Pang
  • Patent number: 8917138
    Abstract: There are provided a noise filter circuit and an operating method thereof. A noise filter circuit includes a first delay circuit, and a second delay circuit connected to the first delay circuit in series, wherein the first delay circuit and the second delay circuit each include at least one inverter and at least one delay element for generating a predetermined delay, and the first delay circuit and the second delay circuit have different filtering characteristics.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: December 23, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sung Man Pang, Chang Jae Heo
  • Patent number: 8908344
    Abstract: There is provided an overheating protection circuit, including a temperature-variable voltage generating unit generating a temperature-variable voltage by adding a temperature-proportional voltage increasing with an increase in temperature and a first turn-on voltage decreasing with an increase in temperature; and an overheating prevention signal generating unit comparing the temperature-variable voltage and a second turn-on voltage decreasing with an increase in temperature to generate an overheating prevention signal, wherein the first turn-on voltage and the second turn-on voltage have the same distribution.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: December 9, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jae Heo
  • Patent number: D717253
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: November 11, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Eun Jung Jo, Jin Suk Son, Job Ha, Jae Hoon Park, Chang Seob Hong, Joon Hyung Cho, In Wha Jeong, Young Hoon Kwak, Chang Jae Heo
  • Patent number: D717255
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: November 11, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae Hyun Lim, Jin Suk Son, Jin Su Kim, Jong Man Kim, Joon Hyung Cho, Kee Ju Um, Min Gyu Park, Kyu Hwan Oh, Chang Jae Heo