Patents by Inventor Joo-hwan Park
Joo-hwan Park 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: 8929960Abstract: A voice call processing method and apparatus for a mobile terminal are provided for improving voice communication quality by switching between matching circuits that are optimized for respective audio output modes of the mobile terminal. The mobile terminal includes at least two matching circuits designated for individual audio output modes, a mode tracking unit for detecting a change from a first audio output mode to a second audio output mode, a control unit for identifying the second audio output mode and the matching circuit designated for the second audio output mode and for outputting a control signal for switching to the matching circuit designated for the second audio output mode, and a switch for switching the signal path between the at least two matching circuits based on the control signal output by the control unit.Type: GrantFiled: August 10, 2010Date of Patent: January 6, 2015Assignee: Samsung Electronics Co., Ltd.Inventor: Joo Hwan Park
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Patent number: 8866799Abstract: A display apparatus includes a display panel, a plurality of gate lines driving circuit parts, a plurality of data lines driving circuit parts and a timing control part. The display panel includes a plurality of gate lines and a plurality of data lines. The gate lines driving circuit parts output gate signals to the gate lines. The data lines driving circuit parts output data signals to the data lines. The timing control part applies a dummy gate signal to at least one dummy gate line, controls a latch sequence of image data and an output sequence of the gate lines driving circuit parts in a reverse sequence, in response to an inverted-mounting mode selection signal for displaying an inverted mount image to the display panel. Because signal lines can be shortened, heat generated by the display apparatus may be decreased and image quality of the display apparatus may be improved.Type: GrantFiled: November 2, 2010Date of Patent: October 21, 2014Assignee: Samsung Display Co., Ltd.Inventors: Bong-Ju Jun, Nam-Gon Choi, Joo-Hwan Park, Yong-Bum Kim, Dong-Hyun Yeo
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Publication number: 20140160110Abstract: A liquid crystal display includes a gate driver including stages, and a clock generator which receives a clock generation control signal, generates a clock signal and a clock bar signal based on one or more of the clock generation control signal, a gate-on voltage and a gate-off voltage, and outputs the clock signal and the clock bar signal to the gate driver. The clock generator includes an overcurrent protector unit which intercepts at least one of the clock signal and the clock bar signal when a voltage level of at least one of the gate-on voltage and the gate-off voltage is greater than a reference level.Type: ApplicationFiled: February 18, 2014Publication date: June 12, 2014Applicant: Samsung Display Co., Ltd.Inventors: Nam-Suk BANG, Hyun-Sang CHO, Joo-Hwan PARK, Jae-Seob CHUNG
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Patent number: 8692757Abstract: A liquid crystal display includes a gate driver including stages, and a clock generator which receives a clock generation control signal, generates a clock signal and a clock bar signal based on one or more of the clock generation control signal, a gate-on voltage and a gate-off voltage, and outputs the clock signal and the clock bar signal to the gate driver. The clock generator includes an overcurrent protector unit which intercepts at least one of the clock signal and the clock bar signal when a voltage level of at least one of the gate-on voltage and the gate-off voltage is greater than a reference level.Type: GrantFiled: February 26, 2010Date of Patent: April 8, 2014Assignee: Samsung Display Co., Ltd.Inventors: Nam-Suk Bang, Hyun-Sang Cho, Joo-Hwan Park, Jae-Seob Chung
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Publication number: 20130090072Abstract: A method and a mobile terminal of improving radiation performance and Specific Absorption Rate (SAR) of an antenna are provided. The mobile terminal includes a controller for generating a control signal for switching a ground according to a frequency band used by an antenna, and a switch unit for switching a contact point for each frequency band according to the control signal.Type: ApplicationFiled: February 17, 2012Publication date: April 11, 2013Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Young Kon LIM, Joo Hwan PARK
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Patent number: 8271060Abstract: An antenna device for a portable wireless terminal is provided. The antenna device includes a main antenna for mobile communication for transmitting and receiving signal in a first frequency band, a Transmit (Tx) sub-antenna for transmitting signals in a second frequency band, a Receive (Rx) sub-antenna for receiving signals in a third frequency band, and a controller for selectively using one of the Tx sub-antenna and the Rx sub-antenna if the second frequency band overlaps with the third frequency band, and for providing control such that the Tx sub-antenna and the Rx sub-antenna are simultaneously used if the second frequency band does not overlap with the third frequency band. Accordingly, without increasing the volume of the portable wireless terminal, an antenna space can be ensured and radiation performance can be improved.Type: GrantFiled: October 5, 2009Date of Patent: September 18, 2012Assignee: Samsung Electronics Co., LtdInventors: Joo-Hwan Park, Oh-Yong Kwon, You-sung Lee
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Publication number: 20110187730Abstract: A display apparatus includes a display panel, a plurality of gate lines driving circuit parts, a plurality of data lines driving circuit parts and a timing control part. The display panel includes a plurality of gate lines and a plurality of data lines. The gate lines driving circuit parts output gate signals to the gate lines. The data lines driving circuit parts output data signals to the data lines. The timing control part applies a dummy gate signal to at least one dummy gate line, controls a latch sequence of image data and an output sequence of the gate lines driving circuit parts in a reverse sequence, in response to an inverted-mounting mode selection signal for displaying an inverted mount image to the display panel. Because signal lines can be shortened, heat generated by the display apparatus may be decreased and image quality of the display apparatus may be improved.Type: ApplicationFiled: November 2, 2010Publication date: August 4, 2011Inventors: Bong-Ju JUN, Nam-Gon CHOI, Joo-Hwan PARK, Yong-Bum KIM, Dong-Hyun YEO
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Publication number: 20110053636Abstract: A voice call processing method and apparatus for a mobile terminal are provided for improving voice communication quality by switching between matching circuits that are optimized for respective audio output modes of the mobile terminal. The mobile terminal includes at least two matching circuits designated for individual audio output modes, a mode tracking unit for detecting a change from a first audio output mode to a second audio output mode, a control unit for identifying the second audio output mode and the matching circuit designated for the second audio output mode and for outputting a control signal for switching to the matching circuit designated for the second audio output mode, and a switch for switching the signal path between the at least two matching circuits based on the control signal output by the control unit.Type: ApplicationFiled: August 10, 2010Publication date: March 3, 2011Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventor: Joo Hwan PARK
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Patent number: 7859633Abstract: A multi-layer flexible film package which shields electromagnetic waves, prevents electrostatic discharge, and at the same time, performs a heat radiation function, and a liquid crystal display device having the same, include an insulating film having circuit patterns and internal ground wiring lines at a first side thereof, an insulating layer formed on the circuit patterns and the internal ground wiring lines, a driver integrated circuit (“IC”) electrically connected to the circuit patterns and the internal ground wiring lines, a ground layer formed on a second side opposite the first side of the insulating film and connected to the internal ground wiring lines, and via holes formed through the insulating film and electrically connecting the internal ground wiring lines and the ground layer.Type: GrantFiled: July 18, 2007Date of Patent: December 28, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Joo-hwan Park
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Publication number: 20100220079Abstract: A liquid crystal display includes a gate driver including stages, and a clock generator which receives a clock generation control signal, generates a clock signal and a clock bar signal based on one or more of the clock generation control signal, a gate-on voltage and a gate-off voltage, and outputs the clock signal and the clock bar signal to the gate driver. The clock generator includes an overcurrent protector unit which intercepts at least one of the clock signal and the clock bar signal when a voltage level of at least one of the gate-on voltage and the gate-off voltage is greater than a reference level.Type: ApplicationFiled: February 26, 2010Publication date: September 2, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Nam-Suk BANG, Hyun-Sang CHO, Joo-Hwan PARK, Jae-Seob CHUNG
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Publication number: 20100113112Abstract: An antenna device for a portable wireless terminal is provided. The antenna device includes a main antenna for mobile communication for transmitting and receiving signal in a first frequency band, a Transmit (Tx) sub-antenna for transmitting signals in a second frequency band, a Receive (Rx) sub-antenna for receiving signals in a third frequency band, and a controller for selectively using one of the Tx sub-antenna and the Rx sub-antenna if the second frequency band overlaps with the third frequency band, and for providing control such that the Tx sub-antenna and the Rx sub-antenna are simultaneously used if the second frequency band does not overlap with the third frequency band. Accordingly, without increasing the volume of the portable wireless terminal, an antenna space can be ensured and radiation performance can be improved.Type: ApplicationFiled: October 5, 2009Publication date: May 6, 2010Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Joo-Hwan Park, Oh-Yong Kwon, You-sung Lee
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Publication number: 20100013781Abstract: A touch key module of an electronic device is provided. The touch key module includes a Printed Circuit Board (PCB) on which a capacitive touch sensor chip is located and a conductor, located on a surface of the PCB, for detecting contact of the capacitive touch sensor chip.Type: ApplicationFiled: July 9, 2009Publication date: January 21, 2010Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Cheol-Woong Park, Il-Seob Baek, Wan-Sang Ryu, Joo-Hwan Park
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Publication number: 20090237340Abstract: A liquid crystal display (LCD) module and a display system including the LCD module are provided. The LCD module includes a common-voltage adjustment unit which is enabled by interfacing with an external device and thus adjusts a common voltage; a signal control unit which outputs a first reverse signal that reverses the polarity of a voltage at intervals of at least two frames; and a data driving unit which reverses the polarity of an image data voltage with respect to the common voltage at intervals of at least two frames in response to the first reverse signal.Type: ApplicationFiled: March 19, 2009Publication date: September 24, 2009Inventors: Joo-Hwan PARK, Seong-Il Kim, Kyung-Woo Kim, Gyu-Su Lee, Dae-Young Joung, Jun-Ho Hwang, Jung-Hoon Ku, Choong-Hwa Kim, Ri-Na You
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Publication number: 20080198125Abstract: A circuit board includes; a reference common voltage generating circuit receiving an input voltage from an input node and outputting a reference common voltage to an output node, wherein the reference common voltage generating circuit includes a voltage distribution unit including a first resistor connected between the input node and the output node and a second resistor connected between the output node and a ground, and a sink current generating unit outputting a sink current to the output node, wherein the sink current is adjusted according to a resistance of a setting resistor, and a coupling line coupling the setting resistor and the reference common voltage generating circuit.Type: ApplicationFiled: September 18, 2007Publication date: August 21, 2008Applicant: SAMSUNG ELECTRONCS CO., LTD.Inventors: Joo-hwan Park, Chung-hyuk Shin, Seung-hoon Jung
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Publication number: 20080024714Abstract: A multi-layer flexible film package which shields electromagnetic waves, prevents electrostatic discharge, and at the same time, performs a heat radiation function, and a liquid crystal display device having the same, include an insulating film having circuit patterns and internal ground wiring lines at a first side thereof, an insulating layer formed on the circuit patterns and the internal ground wiring lines, a driver integrated circuit (“IC”) electrically connected to the circuit patterns and the internal ground wiring lines, a ground layer formed on a second side opposite the first side of the insulating film and connected to the internal ground wiring lines, and via holes formed through the insulating film and electrically connecting the internal ground wiring lines and the ground layer.Type: ApplicationFiled: July 18, 2007Publication date: January 31, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Joo-hwan Park
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Publication number: 20060111162Abstract: A portable wireless terminal with a built-in antenna module is provided. In the portable wireless terminal, a main body includes an upper case frame, a lower case frame, and a main board mounted between the upper and lower case frames. A built-in antenna module is disposed on the main board. A conductor is formed or mounted on at least one of the upper and lower case frames in the vicinity of the built-in antenna module, thereby preventing the degradation of the radiation of the built-in antenna module caused by an external interference and improving antenna performance.Type: ApplicationFiled: November 22, 2005Publication date: May 25, 2006Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-Beom Seol, Chin-Sop Choe, Jang-Hyun Nam, Cheol-Woong Park, Wan-Sang Ryu, Joo-Hwan Park