Patents by Inventor Hae Kwan Oh
Hae Kwan 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: 20220385270Abstract: A surface acoustic wave device according to the present disclosure includes a support substrate; an intermediate layer laminated on the support substrate; a piezoelectric layer laminated on the intermediate layer; and an IDT electrode formed on the piezoelectric layer, an Euler angle of the support substrate is (?45°±10°, ?54°±10°, 180°±30°) and an Euler angle of the piezoelectric layer is (0°±5°, 112.5°±22.5°, 0°±5°) or (0°±5°, ?67.5°±22.5°, 0°±5°).Type: ApplicationFiled: April 8, 2022Publication date: December 1, 2022Inventors: Hae Kwan OH, Takahiro SATO, Yoshikazu KIHARA, Tae Hyun KIM
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Patent number: 10697828Abstract: A multispectral optical sensor is disclosed. In one embodiment, the multispectral optical sensor includes a piezoelectric material, a first sensing layer and a second sensing layer spaced apart from each other on the piezoelectric material and configured to change the propagation speed of the acoustic wave propagated through the piezoelectric material by receiving ultraviolet light and visible light, respectively. The multiple optical sensor further includes a first acoustic wave output part and a second acoustic wave output part disposed on the piezoelectric material respectively corresponding to the first and second sensing layers and configured to generate an electrical signal based on the changed acoustic wave. The multiple optical sensor measures the intensity of ultraviolet and visible light using a single sensor by detecting the change in frequency, and measures the frequency change in the acoustic wave using zinc oxide, gallium nitride), or cadmium sulfide nanoparticles.Type: GrantFiled: January 17, 2018Date of Patent: June 30, 2020Assignee: KOREA ELECTRONICS TECHNOLOGY INSTITUTEInventors: Kunnyun Kim, Yeon Hwa Kwak, Hae Kwan Oh
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Patent number: 10353268Abstract: Provided are an acousto-optic element, an acousto-optic element array, and a display apparatus including the acousto-optic element array. The acousto-optic element includes: an acousto-optic modulator which includes an acousto-optic layer formed of an acousto-optic material; a light supplier which supplies light to the acousto-optic modulator in a first direction; a first sound-wave modulator which applies first elastic waves to the acousto-optic modulator in a second direction; and a second sound-wave modulator which applies second elastic waves to the acousto-optic modulator in a third direction. The light supplied from the light supplier to the acousto-optic modulator is deflected by diffraction caused by the first elastic waves applied from the first sound-wave modulator and diffraction caused by the second elastic waves applied from the second sound-wave modulator, and is output from the acousto-optic modulator through a front side of the acousto-optic modulator.Type: GrantFiled: July 5, 2017Date of Patent: July 16, 2019Assignees: SAMSUNG ELECTRONICS CO., LTD., AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Seung-hoon Han, Won-taek Seo, Hae-kwan Oh, Hong-seok Lee, Eun-hyoung Cho, Kee-keun Lee
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Patent number: 10222257Abstract: An ultraviolet-ray (UV) sensor is disclosed. In one embodiment, the UV sensor includes a piezoelectric material, a sensing film arranged on the piezoelectric material and senses ultraviolet rays, an elastic wave input unit arranged on one end of the sensing film on the piezoelectric material and provides the sensing film with an elastic wave generated based on an electrical signal and an elastic wave output unit arranged on the other end of the sensing film on the piezoelectric material and senses a change in frequency of the electrical signal generated based on the provided elastic wave. The UV sensor improves sensitivity of the sensor by enabling the particles having large surface areas due to their characteristics to react with a larger amount of ultraviolet rays. the UV sensor can secure price competitiveness since the UV sensor measures a change in frequency of the elastic wave using zinc oxide (ZnO) nanoparticles.Type: GrantFiled: January 17, 2018Date of Patent: March 5, 2019Assignee: KOREA ELECTRONICS TECHNOLOGY INSTITUTEInventors: Kunnyun Kim, Yeon Hwa Kwak, Hae Kwan Oh
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Patent number: 10114268Abstract: Provided is an acousto-optic device including an elastic medium; a meta structure formed on a first surface of the elastic medium, and an elastic-wave generating unit which generates an elastic wave in the elastic medium. The meta structure includes a first layer and a second layer that is formed on the first layer. The at least one of the first layer and the second layer includes a predetermined repetitive pattern.Type: GrantFiled: January 23, 2014Date of Patent: October 30, 2018Assignees: SAMSUNG ELECTRONICS CO., LTD., AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Seung-hoon Han, Wan-joo Maeng, Won-taek Seo, Hoon Song, Hae-kwan Oh, Kee-keun Lee
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Publication number: 20180143069Abstract: An ultraviolet-ray (UV) sensor is disclosed. In one embodiment, the UV sensor includes a piezoelectric material, a sensing film arranged on the piezoelectric material and senses ultraviolet rays, an elastic wave input unit arranged on one end of the sensing film on the piezoelectric material and provides the sensing film with an elastic wave generated based on an electrical signal and an elastic wave output unit arranged on the other end of the sensing film on the piezoelectric material and senses a change in frequency of the electrical signal generated based on the provided elastic wave. The UV sensor improves sensitivity of the sensor by enabling the particles having large surface areas due to their characteristics to react with a larger amount of ultraviolet rays. the UV sensor can secure price competitiveness since the UV sensor measures a change in frequency of the elastic wave using zinc oxide (ZnO) nanoparticles.Type: ApplicationFiled: January 17, 2018Publication date: May 24, 2018Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTEInventors: Kunnyun KIM, Yeon Hwa KWAK, Hae Kwan OH
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Publication number: 20180143070Abstract: A multispectral optical sensor is disclosed. In one embodiment, the multispectral optical sensor includes a piezoelectric material, a first sensing layer and a second sensing layer spaced apart from each other on the piezoelectric material and configured to change the propagation speed of the acoustic wave propagated through the piezoelectric material by receiving ultraviolet light and visible light, respectively. The multiple optical sensor further includes a first acoustic wave output part and a second acoustic wave output part disposed on the piezoelectric material respectively corresponding to the first and second sensing layers and configured to generate an electrical signal based on the changed acoustic wave. The multiple optical sensor measures the intensity of ultraviolet and visible light using a single sensor by detecting the change in frequency, and measures the frequency change in the acoustic wave using zinc oxide, gallium nitride), or cadmium sulfide nanoparticles.Type: ApplicationFiled: January 17, 2018Publication date: May 24, 2018Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTEInventors: Kunnyun KIM, Yeon Hwa KWAK, Hae Kwan OH
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Publication number: 20170299942Abstract: Provided are an acousto-optic element, an acousto-optic element array, and a display apparatus including the acousto-optic element array. The acousto-optic element includes: an acousto-optic modulator which includes an acousto-optic layer formed of an acousto-optic material; a light supplier which supplies light to the acousto-optic modulator in a first direction; a first sound-wave modulator which applies first elastic waves to the acousto-optic modulator in a second direction; and a second sound-wave modulator which applies second elastic waves to the acousto-optic modulator in a third direction. The light supplied from the light supplier to the acousto-optic modulator is deflected by diffraction caused by the first elastic waves applied from the first sound-wave modulator and diffraction caused by the second elastic waves applied from the second sound-wave modulator, and is output from the acousto-optic modulator through a front side of the acousto-optic modulator.Type: ApplicationFiled: July 5, 2017Publication date: October 19, 2017Applicants: SAMSUNG ELECTRONICS CO., LTD., AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Seung-hoon HAN, Won-taek SEO, Hae-kwan OH, Hong-seok LEE, Eun-hyoung CHO, Kee-keun LEE
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Patent number: 9778541Abstract: Provided are an acousto-optic element, an acousto-optic element array, and a display apparatus including the acousto-optic element array. The acousto-optic element includes: an acousto-optic modulator which includes an acousto-optic layer formed of an acousto-optic material; a light supplier which supplies light to the acousto-optic modulator in a first direction; a first sound-wave modulator which applies first elastic waves to the acousto-optic modulator in a second direction; and a second sound-wave modulator which applies second elastic waves to the acousto-optic modulator in a third direction. The light supplied from the light supplier to the acousto-optic modulator is deflected by diffraction caused by the first elastic waves applied from the first sound-wave modulator and diffraction caused by the second elastic waves applied from the second sound-wave modulator, and is output from the acousto-optic modulator through a front side of the acousto-optic modulator.Type: GrantFiled: July 1, 2014Date of Patent: October 3, 2017Assignees: SAMSUNG ELECTRONICS CO., LTD., AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Seung-hoon Han, Won-taek Seo, Hae-kwan Oh, Hong-seok Lee, Eun-hyoung Cho, Kee-keun Lee
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Patent number: 9528832Abstract: Provided is a gyroscope using a surface acoustic wave (SAW) and an angular velocity measurement method. The gyroscope includes an SAW resonator generating a first SAW, generating Coriolis force using an interaction between a velocity component of the first SAW and applied angular velocity on a metallic dot layer disposed in a certain position, and generating a second SAW using the Coriolis force, an SAW sensing oscillator generating a third SAW and receiving a fourth SAW, which is the third SAW reflected and returning after causing interference due to the second SAW, and a measurement device measuring a level of the applied angular velocity using variations in time of receiving the fourth SAW.Type: GrantFiled: December 31, 2012Date of Patent: December 27, 2016Assignee: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATIONInventors: Kee Keun Lee, Sang Sik Yang, Hae Kwan Oh
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Patent number: 9116034Abstract: A wireless measurement device includes a sound acoustic wave (SAW)-based micro sensor converting a wirelessly received pulse signal into an SAW and generating a plurality of pulse signals by reflecting the SAW, and wirelessly transmitting the plurality of pulse signals to measure a variance of an environmental element; and a reader generating and wirelessly transmitting a pulse signal to the SAW-based micro sensor to measure variances in environmental elements.Type: GrantFiled: September 14, 2011Date of Patent: August 25, 2015Assignee: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATIONInventors: Sang Sik Yang, Ik Mo Park, Young kil Kim, Kee Keun Lee, Ick Jin Kwon, Hae Kwan Oh
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Publication number: 20150160530Abstract: Provided are an acousto-optic element, an acousto-optic element array, and a display apparatus including the acousto-optic element array. The acousto-optic element includes: an acousto-optic modulator which includes an acousto-optic layer formed of an acousto-optic material; a light supplier which supplies light to the acousto-optic modulator in a first direction; a first sound-wave modulator which applies first elastic waves to the acousto-optic modulator in a second direction; and a second sound-wave modulator which applies second elastic waves to the acousto-optic modulator in a third direction. The light supplied from the light supplier to the acousto-optic modulator is deflected by diffraction caused by the first elastic waves applied from the first sound-wave modulator and diffraction caused by the second elastic waves applied from the second sound-wave modulator, and is output from the acousto-optic modulator through a front side of the acousto-optic modulator.Type: ApplicationFiled: July 1, 2014Publication date: June 11, 2015Applicants: SAMSUNG ELECTRONICS CO., LTD., AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONInventors: Seung-hoon HAN, Won-taek SEO, Hae-kwan OH, Hong-seok LEE, Eun-hyoung CHO, Kee-keun LEE
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Publication number: 20150000399Abstract: Provided is a gyroscope using a surface acoustic wave (SAW) and an angular velocity measurement method. The gyroscope includes an SAW resonator generating a first SAW, generating Coriolis force using an interaction between a velocity component of the first SAW and applied angular velocity on a metallic dot layer disposed in a certain position, and generating a second SAW using the Coriolis force, an SAW sensing oscillator generating a third SAW and receiving a fourth SAW, which is the third SAW reflected and returning after causing interference due to the second SAW, and a measurement device measuring a level of the applied angular velocity using variations in time of receiving the fourth SAW.Type: ApplicationFiled: December 31, 2012Publication date: January 1, 2015Applicant: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATIONInventors: Kee Keun Lee, Sang Sik Yang, Hae Kwan Oh
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Publication number: 20140240812Abstract: Provided is an acousto-optic device including an elastic medium; a meta structure formed on a first surface of the elastic medium, and an elastic-wave generating unit which generates an elastic wave in the elastic medium. The meta structure includes a first layer and a second layer that is formed on the first layer. The at least one of the first layer and the second layer includes a predetermined repetitive pattern.Type: ApplicationFiled: January 23, 2014Publication date: August 28, 2014Applicants: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATION, SAMSUNG ELECTRONICS CO., LTD.Inventors: Seung-hoon HAN, Wan-joo MAENG, Won-taek SEO, Hoon SONG, Hae-kwan OH, Kee-keun LEE
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Publication number: 20130174662Abstract: A wireless measurement device includes a sound acoustic wave (SAW)-based micro sensor converting a wirelessly received pulse signal into an SAW and generating a plurality of pulse signals by reflecting the SAW, and wirelessly transmitting the plurality of pulse signals to measure a variance of an environmental element; and a reader generating and wirelessly transmitting a pulse signal to the SAW-based micro sensor to measure variances in environmental elements.Type: ApplicationFiled: September 14, 2011Publication date: July 11, 2013Applicant: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATIONInventors: Sang Sik Yang, Ik Mo Park, Young kil Kim, Kee Keun Lee, Ick Jin Kwon, Hae Kwan Oh