Patents by Inventor Do-hwan Oh
Do-hwan Oh 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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Publication number: 20240155212Abstract: A camera module includes: a first body including a substrate; an image sensor mounted on the substrate; a second body including a lens module; a ball bearing disposed between the first body and the second body to enable movement of the second body relative to the first body; and a driving member disposed between the first body and the second body to provide driving force to move the second body in at least one direction intersecting an optical axis.Type: ApplicationFiled: May 16, 2023Publication date: May 9, 2024Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Do Hwan KIM, Ju Ho KIM, Sang Hyun JI, Jung Hyun PARK, Nam Keun OH, Doo Seub SHIN, Dong Hoon LEE, Jong Eun PARK, Sangik CHO
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Patent number: 9069406Abstract: A mixer of a touch panel system includes a first switch configured to switch a sensing signal in accordance with a reference signal; a second switch configured to switch the sensing signal in accordance with a phase-inverted reference signal from the reference signal. Further, the mixer of the touch panel system includes a first low pass filter configured to perform low-pass filtering on a first output signal produced from the first switch; and a second low pass filter configured to perform low-pass filtering on a second output signal produced from the second switch. Furthermore, the mixer of the touch panel system includes a differentiator configured to differentiate signals produced from the first low pass filter and the second low pass filter, to thereby produce a signal of constant level as the sensing signal.Type: GrantFiled: June 20, 2012Date of Patent: June 30, 2015Assignee: MELFAS INC.Inventor: Do-Hwan Oh
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Patent number: 9063621Abstract: A touch sensor panel used for a display device is provided. The touch sensor panel can precisely determine a touch location with a given area of electrodes, can reduce the number of channels required, and can reduce the influence of noise. In addition, the touch sensor panel can improve sensing resolution with a given number of electrode channels, can be robust against noise, and can improve linearity by precisely determining a touch location and visibility of displayed image by dummy electrodes.Type: GrantFiled: July 3, 2012Date of Patent: June 23, 2015Assignee: MELFAS, INC.Inventors: Jae Hong Kim, Do Hwan Oh
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Patent number: 8884667Abstract: A touch panel system includes a signal generator configured to generate a reference signal and one or more channels. Each of the channels comprises a sensing unit configured to sense a touch thereon to output a sensing signal indicative of the touch; and a delay unit configured to adjust the reference signal based on a delay compensation value to compensate delay of the reference signal caused by the difference of distance between the signal generator and the channel. Further, each of the channels comprises an operation unit configured to perform an operation on the sensing signal and the reference signal from the delay unit to produce an operation result representing difference between the sensing signal and the adjusted reference signal; and a controller configured to determine the delay compensation value of the delay unit in each channel based on the voltage signal from the operation unit.Type: GrantFiled: June 11, 2012Date of Patent: November 11, 2014Assignee: Melfas Inc.Inventor: Do-Hwan Oh
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Publication number: 20130285945Abstract: Provided are a touch sensing panel and a touch sensing panel for detecting multiple touches, including a first conductive trace formed along a first axial direction, a second conductive trace formed along a second axial direction intersecting the first axis, and an auxiliary conductive trace electrically connected to the second conductive trace, and formed along the first axial direction. An interpolation effect of a touched input moving in a horizontal direction may be expected, and an accuracy and linearity of the touched input may be enhanced through the auxiliary conductive trace generating a detected signal so that a dead region with respect to the touched input may be prevented from occurring.Type: ApplicationFiled: February 24, 2011Publication date: October 31, 2013Applicant: MELEFAS, INC.Inventors: Do Hwan Oh, Dong Jin Min, Dong Yoon Han
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Publication number: 20130106781Abstract: The present invention relates to a touch sensing panel for delivering a sensing signal to a touch sensor chip by using a circuit board, and a touch sensing device, wherein: the touch sensing panel is formed by using a substrate on which a conductive trace is disposed and by using a circuit board, which delivers to a touch sensor chip, a sensing signal that is generated from said conductive trace by a touching object; and said touch sensing device is capable of sensing a touch input of the touching object by using said touch sensing panel.Type: ApplicationFiled: July 12, 2011Publication date: May 2, 2013Applicant: Melfas, Inc.Inventor: Do Hwan Oh
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Publication number: 20130027348Abstract: Provided are a touch sensing panel and a touch sensing apparatus for detecting an absolute location with respect to at least one touch, including a driving electrode forming a mutual capacitance between a sensing electrode and the driving electrode in response to a predetermined driving signal and including at least two electrode surfaces divided by a width size.Type: ApplicationFiled: February 25, 2011Publication date: January 31, 2013Applicant: MELFAS, INC.Inventors: Do Hwan Oh, Byung Sang Rhim
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Publication number: 20130021296Abstract: The present invention relates to a touch-sensing panel and to a touch-sensing apparatus. The touch-sensing panel according to the present invention includes a substrate and one or more sensing regions prepared on the substrate, wherein the sensing region includes one or more first electrodes extending in a first axis direction, and one or more second electrodes extending in a second axis direction intersecting the first axis, and wherein at least some of the second electrodes are electrically connected to another second electrode arrayed at the same position on a first axis and included in another unit sensing region.Type: ApplicationFiled: March 23, 2011Publication date: January 24, 2013Inventors: Dong Jin Min, Do Hwan Oh
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Publication number: 20120327000Abstract: A mixer of a touch panel system includes a first switch configured to switch a sensing signal in accordance with a reference signal; a second switch configured to switch the sensing signal in accordance with a phase-inverted reference signal from the reference signal. Further, the mixer of the touch panel system includes a first low pass filter configured to perform low-pass filtering on a first output signal produced from the first switch; and a second low pass filter configured to perform low-pass filtering on a second output signal produced from the second switch. Furthermore, the mixer of the touch panel system includes a differentiator configured to differentiate signals produced from the first low pass filter and the second low pass filter, to thereby produce a signal of constant level as the sensing signal.Type: ApplicationFiled: June 20, 2012Publication date: December 27, 2012Inventor: Do-Hwan OH
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Publication number: 20120319974Abstract: A touch sensor panel used for a display device is provided. The touch sensor panel can precisely determine a touch location with a given area of electrodes, can reduce the number of channels required, and can reduce the influence of noise. In addition, the touch sensor panel can improve sensing resolution with a given number of electrode channels, can be robust against noise, and can improve linearity by precisely determining a touch location and visibility of displayed image by dummy electrodes.Type: ApplicationFiled: July 3, 2012Publication date: December 20, 2012Inventors: Jae Hong KIM, Do Hwan Oh
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Publication number: 20120313675Abstract: A touch panel system includes a signal generator configured to generate a reference signal and one or more channels. Each of the channels comprises a sensing unit configured to sense a touch thereon to output a sensing signal indicative of the touch; and a delay unit configured to adjust the reference signal based on a delay compensation value to compensate delay of the reference signal caused by the difference of distance between the signal generator and the channel. Further, each of the channels comprises an operation unit configured to perform an operation on the sensing signal and the reference signal from the delay unit to produce an operation result representing difference between the sensing signal and the adjusted reference signal; and a controller configured to determine the delay compensation value of the delay unit in each channel based on the voltage signal from the operation unit.Type: ApplicationFiled: June 11, 2012Publication date: December 13, 2012Inventor: Do-Hwan OH
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Patent number: 8289314Abstract: A method of modulating and demodulating a signal includes modulating data information included in an input data signal provided from an external source and clock information included in an input clock signal provided from the external source into a transmission signal, using (n+1) delay clock signals generated based on the input clock signal, where n is a natural number. The transmission signal is demodulated into an output clock signal including restored clock information and an output data signal including restored data information, using (m+1) delay clock signals generated based on the clock information, where m is a natural number less than n.Type: GrantFiled: September 29, 2009Date of Patent: October 16, 2012Assignees: Samsung Electronics Co., Ltd., Seoul National University R&DB FoundationInventors: Weon-Jun Choe, Ah-Reum Kim, Kyo-Jin Choo, Deog-Kyoon Jeong, Do-Hwan Oh, Hee-Soo Song
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Patent number: 8106714Abstract: An adjustable capacitor is provided including a capacitor unit including a plurality of capacitor groups aligned in a matrix format and a switch unit to adjust capacitance by connecting the plurality of capacitor groups in parallel according to a selection signal of a column and row of the matrix. Accordingly, the adjustable capacitor may be realized of a small size but with a high capacitance change rate.Type: GrantFiled: December 4, 2009Date of Patent: January 31, 2012Assignees: Samsung Electronics Co., Ltd., Seoul National University R&DB FoundationInventors: Do-hwan Oh, Kyo-Jin Choo, Deog-Kyoon Jeong
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Publication number: 20110267122Abstract: The present invention relates to an all-digital clock data recovery (CDR) which is implemented by a digital filter and a digitally controlled oscillator.Type: ApplicationFiled: January 22, 2009Publication date: November 3, 2011Applicant: GLONET SYSTEMS, INC.Inventors: Deog Kyoon Jeong, Do Hwan Oh
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Patent number: 7973578Abstract: A time-to-digital converter (TDC) includes a converter which receives a first signal and a second signal, delays the second signal in phases using a plurality of delay elements which are coupled in series, compares the delayed second signal with the first signal, and outputs a phase error of the second signal with respect to the first signal, a phase frequency detector which receives the first signal, and a third signal from one of the nodes in the plurality of delay elements, and outputs a phase difference between the first signal and the third signal, and a frequency detector which outputs a frequency error of the second signal with respect to the first signal as a digital code using an output signal of the phase frequency detector and the second signal.Type: GrantFiled: November 30, 2009Date of Patent: July 5, 2011Assignees: Samsung Electronics Co., Ltd., Seoul National University R&DB FoundationInventors: Do-hwan Oh, Kyo-Jin Choo, Deog-Kyoon Jeong
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Publication number: 20100238157Abstract: A method of modulating and demodulating a signal includes modulating data information included in an input data signal provided from an external source and clock information included in an input clock signal provided from the external source into a transmission signal, using (n+1) delay clock signals generated based on the input clock signal, where n is a natural number. The transmission signal is demodulated into an output clock signal including restored clock information and an output data signal including restored data information, using (m+1) delay clock signals generated based on the clock information, where m is a natural number less than n.Type: ApplicationFiled: September 29, 2009Publication date: September 23, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Weon-Jun CHOE, Ah-Reum KIM, Kyo-Jin CHOO, Deog-Kyoon JEONG, Do-Hwan OH, Hee-Soo SONG
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Publication number: 20100156550Abstract: An adjustable capacitor is provided including a capacitor unit including a plurality of capacitor groups aligned in a matrix format and a switch unit to adjust capacitance by connecting the plurality of capacitor groups in parallel according to a selection signal of a column and row of the matrix. Accordingly, the adjustable capacitor may be realized of a small size but with a high capacitance change rate.Type: ApplicationFiled: December 4, 2009Publication date: June 24, 2010Applicants: Samsung Electronics Co., Ltd., Seoul National University R&DB FoundationInventors: Do-hwan OH, Kyo-Jin CHOO, Deog-Kyoon JEONG
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Publication number: 20100134165Abstract: A time-to-digital converter (TDC) includes a converter which receives a first signal and a second signal, delays the second signal in phases using a plurality of delay elements which are coupled in series, compares the delayed second signal with the first signal, and outputs a phase error of the second signal with respect to the first signal, a phase frequency detector which receives the first signal, and a third signal from one of the nodes in the plurality of delay elements, and outputs a phase difference between the first signal and the third signal, and a frequency detector which outputs a frequency error of the second signal with respect to the first signal as a digital code using an output signal of the phase frequency detector and the second signal.Type: ApplicationFiled: November 30, 2009Publication date: June 3, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATIONInventors: Do-hwan OH, Kyo-Jin CHOO, Deog-Kyoon JEONG