Patents by Inventor Hee Chang Hwang
Hee Chang Hwang 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: 20240136474Abstract: A method of manufacturing a display device includes providing an adhesive material layer on a display panel, curing the adhesive material layer to form an adhesive layer, providing a cover layer on the adhesive layer, and adhering the cover layer to the adhesive layer, and a modulus of the adhesive layer at room temperature is in a range of about 103 Pa to about 106 Pa.Type: ApplicationFiled: June 4, 2023Publication date: April 25, 2024Applicant: Samsung Display Co., LTD.Inventors: Ji Yun BANG, Jung Wook KIM, Hee Chang KIM, Eun Joong MUN, Kyoung Hee PARK, Hyeon Deuk HWANG
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Patent number: 10726228Abstract: A semiconductor device comprising a fingerprint sensor configured to generate first-direction sensing data and second-direction sensing data by sensing a fingerprint image in a first direction and a second direction, respectively, which is perpendicular to the first direction; a differential sensing circuit configured to generate first-direction first differential data and second-direction first differential data by performing a differential operation on the first-direction sensing data and the second-direction sensing data, respectively; and a fingerprint processing circuit configured to generate first-direction second differential data and second-direction second differential data by performing a differential operation on the first-direction first differential data and the second-direction first differential data, respectively, and generate fingerprint data by adding the first-direction second differential data and the second-direction second differential data.Type: GrantFiled: July 12, 2017Date of Patent: July 28, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hee Chang Hwang, Jae Jin Park, Min Chul Lee, Seung Hoon Lee, Dae Young Chung
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Publication number: 20190294851Abstract: A display panel for providing sensing light to an optical fingerprint sensor and a fingerprint sensing system including the display panel are provided. A display panel according to an example embodiment includes a window glass, a phase change layerunder the window glass and delaying a phase of light, a polarizing plate under the phase change layer, a pixel layer under the polarizing plate and having a plurality of pixels each emitting light, and a substrate under the pixel layer and configured to transmit the sensing light generated by scattering light emitted from at least a part of the plurality of pixels by a fingerprint on the window glass.Type: ApplicationFiled: March 18, 2019Publication date: September 26, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Dae-young CHUNG, Sang-hyun Cho, Hee-chang Hwang, Sung-mok Lee, Jong-sung Lee
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Patent number: 10146985Abstract: A sensing read-out circuit includes an amplifier circuit that converts a charge output from a sensing line of a sensor into a first voltage, another amplifier circuit that converts a charge output from another sensing line into a second voltage, another amplifier circuit that generates a first amplified voltage by amplifying a difference between the first voltage and the second voltage, an analog-to-digital converter that converts the first amplified voltage into a digital signal, a first mixer that generates a second mixed signal by mixing the first digital signal and an in-phase clock signal, a second mixer that generates a second mixed signal by mixing the first digital signal and a quadrature-phase clock signal, a first filter that generates an in-phase signal by performing low-pass filtering on the first mixed signal, and a second filter that generates a quadrature-phase signal by performing low-pass filtering on the second mixed signal.Type: GrantFiled: February 21, 2017Date of Patent: December 4, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dae Young Chung, Jae Jin Park, Hee Chang Hwang
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Publication number: 20180039809Abstract: A sensing read-out circuit includes an amplifier circuit that converts a charge output from a sensing line of a sensor into a first voltage, another amplifier circuit that converts a charge output from another sensing line into a second voltage, another amplifier circuit that generates a first amplified voltage by amplifying a difference between the first voltage and the second voltage, an analog-to-digital converter that converts the first amplified voltage into a digital signal, a first mixer that generates a second mixed signal by mixing the first digital signal and an in-phase clock signal, a second mixer that generates a second mixed signal by mixing the first digital signal and a quadrature-phase clock signal, a first filter that generates an in-phase signal by performing low-pass filtering on the first mixed signal, and a second filter that generates a quadrature-phase signal by performing low-pass filtering on the second mixed signal.Type: ApplicationFiled: February 21, 2017Publication date: February 8, 2018Inventors: DAE YOUNG CHUNG, Jae Jin Park, Hee Chang Hwang
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Publication number: 20180039810Abstract: A semiconductor device comprising a fingerprint sensor configured to generate first-direction sensing data and second-direction sensing data by sensing a fingerprint image in a first direction and a second direction, respectively, which is perpendicular to the first direction; a differential sensing circuit configured to generate first-direction first differential data and second-direction first differential data by performing a differential operation on the first-direction sensing data and the second-direction sensing data, respectively; and a fingerprint processing circuit configured to generate first-direction second differential data and second-direction second differential data by performing a differential operation on the first-direction first differential data and the second-direction first differential data, respectively, and generate fingerprint data by adding the first-direction second differential data and the second-direction second differential data.Type: ApplicationFiled: July 12, 2017Publication date: February 8, 2018Inventors: Hee Chang HWANG, Jae Jin PARK, Min Chul LEE, Seung Hoon LEE, Dae Young CHUNG
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Publication number: 20180012069Abstract: At least some example embodiments provide a fingerprint sensor, a fingerprint sensor package, and a fingerprint sensing system using light sources of a display panel. The fingerprint sensor includes an image sensor including a plurality of sensor pixels, the sensor pixels configured to sense light reflected by a fingerprint and generate image information corresponding to the fingerprint and a pinhole mask defining a plurality of pinholes, wherein each of the pinholes forms a focus for transmitting the light reflected by the fingerprint to the image sensor, wherein light is emitted from a plurality of organic light-emitting diodes (OLEDs) and is reflected by the fingerprint.Type: ApplicationFiled: June 30, 2017Publication date: January 11, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Dae-young Chung, Hee-chang Hwang, Kun-yong Yoon, Woon-bae Kim, Bum-suk Kim, Min Jang, Min-chul Lee, Jung-woo Kim
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Patent number: 9841841Abstract: A touch controller includes a driving signal transmitter and a sensing signal receiver. The driving signal transmitter is configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency. The first frequency is higher than a preset carrier frequency and the second frequency is less than the carrier frequency. The driving signal transmitter inputs the driving signal to a touch panel. The sensing signal receiver is configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal.Type: GrantFiled: December 22, 2015Date of Patent: December 12, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Hee-Chang Hwang
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Publication number: 20160202839Abstract: A touch controller includes a driving signal transmitter and a sensing signal receiver. The driving signal transmitter is configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency. The first frequency is higher than a preset carrier frequency and the second frequency is less than the carrier frequency. The driving signal transmitter inputs the driving signal to a touch panel. The sensing signal receiver is configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal.Type: ApplicationFiled: December 22, 2015Publication date: July 14, 2016Inventor: HEE-CHANG HWANG
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Publication number: 20150138145Abstract: A touch screen controller, a touch screen system, and a display apparatus including the same includes a touch data generator that supplies a first transmission signal to a first sensing line, supplies a second transmission signal to a second sensing line adjacent to the first sensing line, receives differential touch signals from the first and second sensing lines, and performs an arithmetic operation on the differential touch signals to generate a single-ended touch signal, and a control logic that calculates touch coordinates by using the single-ended touch signal from the touch data generator. At least one of phases and frequencies of the first and second transmission signals have different values.Type: ApplicationFiled: November 4, 2014Publication date: May 21, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hee-chang Hwang, Yoon-kyung Choi, Ki-duk Kim, Jong-seon Kim, Jong-kang Park
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Patent number: 8810444Abstract: An analog-to-digital converting circuit includes a first comparison circuit configured to compare a first analog signal associated with a first digital signal with an analog input signal and output a first selection signal based on a result of the comparison, a second comparison circuit configured to compare a second analog signal associated with a second digital signal with the analog input signal and output a second selection signal based on a result of the comparison, and a selection circuit configured to generate intermediate digital signals associated with the first digital signal and output one of the intermediate digital signals as the first digital signal and another of the intermediate digital signals as the second digital signal, based on the first selection signal and the second selection signal.Type: GrantFiled: March 15, 2013Date of Patent: August 19, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Hee Chang Hwang
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Publication number: 20130257636Abstract: An analog-to-digital converting circuit includes a first comparison circuit configured to compare a first analog signal associated with a first digital signal with an analog input signal and output a first selection signal based on a result of the comparison, a second comparison circuit configured to compare a second analog signal associated with a second digital signal with the analog input signal and output a second selection signal based on a result of the comparison, and a selection circuit configured to generate intermediate digital signals associated with the first digital signal and output one of the intermediate digital signals as the first digital signal and another of the intermediate digital signals as the second digital signal, based on the first selection signal and the second selection signal.Type: ApplicationFiled: March 15, 2013Publication date: October 3, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: HEE CHANG HWANG
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Patent number: 7738462Abstract: A method and apparatus for processing data in a Controller Area Network (CAN) are discussed. In an embodiment of this invention, dummy data is added to data to be transmitted via a CAN message, and information indicating that the dummy data is added is transmitted via the CAN message. A length of the dummy data is determined such that data to be transmitted via the CAN message becomes a predetermined length, and data in which five or more successive bits do not have a same value is added as the dummy data. The information is included in a field indicating a length of data to be transmitted via the CAN message, and is indicated by a value within a reserved range of the field. Accordingly, data processing efficiency can be improved, and flexible CAN communication can be performed via the CAN message.Type: GrantFiled: October 16, 2006Date of Patent: June 15, 2010Assignee: LG Electronics Inc.Inventor: Hee Chang Hwang
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Publication number: 20070223532Abstract: A method and system for processing data between communication protocol layers are discussed. According to an embodiment, a memory is formed in a data link layer to store data received from a lower layer and to transmit the stored data to an upper layer, so that a data loss due to a data processing difference between different layers can be prevented.Type: ApplicationFiled: March 21, 2007Publication date: September 27, 2007Applicant: LG Electronics Inc.Inventor: Hee Chang Hwang
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Publication number: 20070091932Abstract: A method and apparatus for processing data in a Controller Area Network (CAN) are discussed. In an embodiment of this invention, dummy data is added to data to be transmitted via a CAN message, and information indicating that the dummy data is added is transmitted via the CAN message. A length of the dummy data is determined such that data to be transmitted via the CAN message becomes a predetermined length, and data in which five or more successive bits do not have a same value is added as the dummy data. The information is included in a field indicating a length of data to be transmitted via the CAN message, and is indicated by a value within a reserved range of the field. Accordingly, data processing efficiency can be improved, and flexible CAN communication can be performed via the CAN message.Type: ApplicationFiled: October 16, 2006Publication date: April 26, 2007Applicant: LG Electronics Inc.Inventor: Hee Chang Hwang