Patents by Inventor Ju-Hyun Ko
Ju-Hyun Ko 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: 11503238Abstract: An image sensor is provided. The image sensor includes a pixel array including first and second pixels, the first and second pixels receiving the same transfer gate signal and outputting first and second signal voltages, respectively, a transfer gate driver receiving first and second voltages and generating the transfer gate signal, the transfer gate signal having the first voltage as its maximum voltage and having the second voltage as its minimum voltage and a compensation module detecting a variation in the second voltage, generating a compensation voltage based on the variation in the second voltage, and performing a compensation operation.Type: GrantFiled: July 29, 2020Date of Patent: November 15, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ju Hyun Ko, Kyu lk Cho, Jin Young Jeong, Dong Jae Han, Seok Yong Hong
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Publication number: 20200358976Abstract: An image sensor is provided. The image sensor includes a pixel array including first and second pixels, the first and second pixels receiving the same transfer gate signal and outputting first and second signal voltages, respectively, a transfer gate driver receiving first and second voltages and generating the transfer gate signal, the transfer gate signal having the first voltage as its maximum voltage and having the second voltage as its minimum voltage and a compensation module detecting a variation in the second voltage, generating a compensation voltage based on the variation in the second voltage, and performing a compensation operation.Type: ApplicationFiled: July 29, 2020Publication date: November 12, 2020Inventors: JU HYUN KO, Kyu lk Cho, Jin Young Jeong, Dong Jae Han, Seok Yong Hong
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Patent number: 10778919Abstract: An image sensor is provided. The image sensor includes a pixel array including first and second pixels, the first and second pixels receiving the same transfer gate signal and outputting first and second signal voltages, respectively, a transfer gate driver receiving first and second voltages and generating the transfer gate signal, the transfer gate signal having the first voltage as its maximum voltage and having the second voltage as its minimum voltage and a compensation module detecting a variation in the second voltage, generating a compensation voltage based on the variation in the second voltage, and performing a compensation operation.Type: GrantFiled: January 17, 2018Date of Patent: September 15, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ju Hyun Ko, Kyu Ik Cho, Jin Young Jeong, Dong Jae Han, Seok Yong Hong
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Patent number: 10600383Abstract: A source driver includes an interpolation amplifier configured to generate an interpolation voltage based on a received plurality of input voltages and output the interpolation voltage to a display panel; and an input selector configured to receive a first voltage and a second voltage having a different level from the first voltage, and configured to selectively provide at least one of the first and second voltages as the plurality of input voltages in response to some of the lower bits of pixel data. The interpolation amplifier includes four conductive differential input pairs configured to receive four input voltages from among the plurality of input voltages, respectively. Each of the first differential input pair and third differential input pair comprises a first type transistor. Each of the second differential input pair and fourth differential input pair comprises a second type transistor.Type: GrantFiled: August 25, 2017Date of Patent: March 24, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yongjoo Song, Pan-soo Kim, Jin-woo Kim, Ju-hyun Ko
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Patent number: 10467973Abstract: A buffer amplifier circuit includes a buffer amplifier including a first differential amplifier having a first active load and a second differential amplifier having a second active load and a feedback circuit configured to feed an output signal of an output terminal of the buffer amplifier back to one of the first and second active loads using differential switch signals and an input signal of the buffer amplifier to enhance a slew rate of the output signal.Type: GrantFiled: July 11, 2016Date of Patent: November 5, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Ju Hyun Ko, Yong Joo Song, Jun Ho Song
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Patent number: 10205905Abstract: An image sensor includes a pixel array in which a plurality of pixels, first and second row selection lines separated from each other, and first and second column lines separated from each other are disposed and a column selecting circuit configured to connect the first and second column lines using a column selection signal. The pixel array includes a first pixel which is connected to the first row selection line and the first column line and a second pixel which is disposed in the same row as the first pixel and connected to the second row selection line and the second column line.Type: GrantFiled: January 3, 2018Date of Patent: February 12, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Kyoung-Min Koh, Ju-Hyun Ko, Han Yang, Jae-Cheol Yun, Kwang-Hyun Lee, Seon-Ju Lee
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Publication number: 20180205903Abstract: An image sensor is provided. The image sensor includes a pixel array including first and second pixels, the first and second pixels receiving the same transfer gate signal and outputting first and second signal voltages, respectively, a transfer gate driver receiving first and second voltages and generating the transfer gate signal, the transfer gate signal having the first voltage as its maximum voltage and having the second voltage as its minimum voltage and a compensation module detecting a variation in the second voltage, generating a compensation voltage based on the variation in the second voltage, and performing a compensation operation.Type: ApplicationFiled: January 17, 2018Publication date: July 19, 2018Inventors: JU HYUN KO, Kyu Ik Cho, Jin Young Jeong, Dong Jae Han, Seok Yong Hong
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Patent number: 9979363Abstract: A source driver includes a buffer device including a plurality of buffers corresponding to a plurality of data lines, each of the plurality of buffers respectively including an amplifier configured to amplify an input signal and an output driver configured to output a driving signal to a corresponding data line among the plurality of data lines; and a switch device including a charge sharing switch configured to electrically connect the plurality of data lines to one another during a charge sharing operation, each of the amplifiers including a first current mirror having a reference current path including a first node and an output current path including a second node, and the first node of the reference current path and the second node of the output current path are electrically connected to each other during the charge sharing operation.Type: GrantFiled: June 2, 2016Date of Patent: May 22, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ju-Hyun Ko, Yong-joo Song, Jun-ho Song, Jin-chul Choi, Beop-hee Kim
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Publication number: 20180131887Abstract: An image sensor includes a pixel array in which a plurality of pixels, first and second row selection lines separated from each other, and first and second column lines separated from each other are disposed and a column selecting circuit configured to connect the first and second column lines using a column selection signal. The pixel array includes a first pixel which is connected to the first row selection line and the first column line and a second pixel which is disposed in the same row as the first pixel and connected to the second row selection line and the second column line.Type: ApplicationFiled: January 3, 2018Publication date: May 10, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Kyoung-Min Koh, Ju-Hyun Ko, Han Yang, Jae-Cheol Yun, Kwang-Hyun Lee, Seon-Ju Lee
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Publication number: 20180082654Abstract: A source driver includes an interpolation amplifier configured to generate an interpolation voltage based on a received plurality of input voltages and output the interpolation voltage to a display panel; and an input selector configured to receive a first voltage and a second voltage having a different level from the first voltage, and configured to selectively provide at least one of the first and second voltages as the plurality of input voltages in response to some of the lower bits of pixel data. The interpolation amplifier includes four conductive differential input pairs configured to receive four input voltages from among the plurality of input voltages, respectively. Each of the first differential input pair and third differential input pair comprises a first type transistor. Each of the second differential input pair and fourth differential input pair comprises a second type transistor.Type: ApplicationFiled: August 25, 2017Publication date: March 22, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Yongjoo SONG, Pan-soo KIM, Jin-woo KIM, Ju-hyun KO
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Publication number: 20170134681Abstract: An image sensor includes a pixel array in which a plurality of pixels, first and second row selection lines separated from each other, and first and second column lines separated from each other are disposed and a column selecting circuit configured to connect the first and second column lines using a column selection signal. The pixel array includes a first pixel which is connected to the first row selection line and the first column line and a second pixel which is disposed in the same row as the first pixel and connected to the second row selection line and the second column line.Type: ApplicationFiled: January 19, 2017Publication date: May 11, 2017Applicant: Samsung Electronics Co., Ltd.Inventors: Kyoung-Min KOH, Ju-Hyun KO, Han YANG, Jae-Cheol YUN, Kwang-Hyun LEE, Seon-Ju LEE
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Patent number: 9584741Abstract: An image sensor includes a pixel array in which a plurality of pixels, first and second row selection lines separated from each other, and first and second column lines separated from each other are disposed and a column selecting circuit configured to connect the first and second column lines using a column selection signal. The pixel array includes a first pixel which is connected to the first row selection line and the first column line and a second pixel which is disposed in the same row as the first pixel and connected to the second row selection line and the second column line.Type: GrantFiled: October 14, 2014Date of Patent: February 28, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyoung-Min Koh, Ju-Hyun Ko, Han Yang, Jae-Cheol Yun, Kwang-Hyun Lee, Seon-Ju Lee
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Publication number: 20170032755Abstract: A buffer amplifier circuit includes a buffer amplifier including a first differential amplifier having a first active load and a second differential amplifier having a second active load and a feedback circuit configured to feed an output signal of an output terminal of the buffer amplifier back to one of the first and second active loads using differential switch signals and an input signal of the buffer amplifier to enhance a slew rate of the output signal.Type: ApplicationFiled: July 11, 2016Publication date: February 2, 2017Inventors: Ju Hyun Ko, Yong Joo Song, Jun Ho Song
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Publication number: 20170032740Abstract: A source driver includes a buffer device including a plurality of buffers corresponding to a plurality of data lines, each of the plurality of buffers respectively including an amplifier configured to amplify an input signal and an output driver configured to output a driving signal to a corresponding data line among the plurality of data lines; and a switch device including a charge sharing switch configured to electrically connect the plurality of data lines to one another during a charge sharing operation, each of the amplifiers including a first current mirror having a reference current path including a first node and an output current path including a second node, and the first node of the reference current path and the second node of the output current path are electrically connected to each other during the charge sharing operation.Type: ApplicationFiled: June 2, 2016Publication date: February 2, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ju-Hyun KO, Yong-joo SONG, Jun-ho SONG, Jin-chul CHOI, Beop-hee KIM
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Patent number: 9467634Abstract: An image sensor includes a pixel array, a column signal processor, and a column mismatch compensator. The pixel array outputs a pixel signal from each column line during a pixel measuring time, and outputs a reference signal during a reference measuring time. The column signal processor performs correlated double sampling (CDS) on the reference signal to generate a reference CDS signal, and performs CDS on the pixel signal to generate a pixel CDS signal. The column mismatch compensator compensates the pixel CDS signal based on the reference CDS signal.Type: GrantFiled: April 7, 2014Date of Patent: October 11, 2016Assignee: Samsung Electronics Co., Ltd.Inventors: Young Tae Jang, Ju Hyun Ko, Kwang June Sohn, Jin Woo Kim, Min Woo Son, Won Joon Hong
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Publication number: 20150195463Abstract: An image sensor includes a pixel array in which a plurality of pixels, first and second row selection lines separated from each other, and first and second column lines separated from each other are disposed and a column selecting circuit configured to connect the first and second column lines using a column selection signal. The pixel array includes a first pixel which is connected to the first row selection line and the first column line and a second pixel which is disposed in the same row as the first pixel and connected to the second row selection line and the second column line.Type: ApplicationFiled: October 14, 2014Publication date: July 9, 2015Inventors: Kyoung-Min KOH, Ju-Hyun KO, Han YANG, Jae-Cheol YUN, Kwang-Hyun LEE, Seon-Ju LEE
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Publication number: 20140313382Abstract: An image sensor includes a pixel array, a column signal processor, and a column mismatch compensator. The pixel array outputs a pixel signal from each column line during a pixel measuring time, and outputs a reference signal during a reference measuring time. The column signal processor performs correlated double sampling (CDS) on the reference signal to generate a reference CDS signal, and performs CDS on the pixel signal to generate a pixel CDS signal. The column mismatch compensator compensates the pixel CDS signal based on the reference CDS signal.Type: ApplicationFiled: April 7, 2014Publication date: October 23, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young Tae JANG, Ju Hyun KO, Kwang June SOHN, Jin Woo KIM, Min Woo SON, Won Joon HONG
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Patent number: 8866060Abstract: A temperature sensor includes a band gap reference (BGR) circuit, a voltage generation unit and a digital CDS circuit. The band gap reference (BGR) circuit generates a reference voltage proportional to a temperature. The voltage generation unit generates a first voltage and a second voltage based on the reference voltage, where the first voltage and the second voltage are proportional to the temperature. The digital CDS circuit generates a digital signal corresponding to the temperature by performing a digital correlated double sampling (CDS) operation on the first voltage and the second voltage. The temperature sensor is able to detect a temperature accurately.Type: GrantFiled: September 23, 2011Date of Patent: October 21, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Min-Ho Kwon, Sin-Hwan Lim, Jin-Ho Seo, Ju-Hyun Ko, Young-Tae Jang, Kyo-Jin Choo
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Patent number: 8593550Abstract: For driving an image sensor having a pixel with a transfer gate formed between a photo-detector and a floating diffusion region, a noise-reducing voltage is applied on the transfer gate during a first period of an integration mode. A blooming current voltage is applied on the transfer gate during a second period of the integration mode. A read voltage is applied on the transfer gate during a read mode after the integration mode. The read voltage has a higher magnitude than the blooming current voltage. With application of the noise-reducing voltage, noise is reduced and a dynamic range is extended for the image sensor.Type: GrantFiled: November 19, 2008Date of Patent: November 26, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-Jin Lee, Ju-Hyun Ko, Jung-Chak Ahn
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Patent number: 8202353Abstract: A separation, purification and recovery method of SF6, HFCs or PFCs is disclosed, which comprises a step for forming a gas hydrate including components in addition to SF6, HFCs or PFCs. It is possible to separate and recover fluoro-gas at a much lower cost as compared to a conventional method for thereby obtaining an economical effect and preventing an emission of SF6, HFCs or PFCs which corresponds to Non-CO2 having a higher earth warming index, which leads to preventing an earth warming phenomenon. So, the present invention might be widely applied.Type: GrantFiled: October 31, 2008Date of Patent: June 19, 2012Assignee: Yoosung Co., Ltd.Inventors: Gang Woo Lee, Jae Jeong Lee, Dong Hyun Moon, Min Choul Kim, Min Gwang Seok, Ju Hyun Ko, Hyung Joon Shin, Young Seog Kim, Ju Dong Lee, Man Sig Lee