Patents by Inventor Seongmin Choi
Seongmin Choi 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: 11990570Abstract: A white light emitting device is provided. The white light emitting device includes a blue light emitting diode configured to emit blue light having a peak wavelength in a first range of 440 nm to 455 nm; a first wavelength conversion material, based on being excited by the blue light, emits first light having a peak wavelength in a second range of 535 nm to 550 nm and a full width at half maximum (FWHM) of 60 nm or less; and a second wavelength conversion material, based on being excited by the blue light, emits second light having a peak wavelength in a third range of 620 nm to 660 nm, wherein a melanopic photopic ratio of white light emitted from the white light emitting device is 0.65 or less, and a color rendering index (CRI) of the white light is 80 or more.Type: GrantFiled: February 25, 2021Date of Patent: May 21, 2024Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seongmin Kim, Chohui Kim, Jeongeun Yun, Seulgee Lee, Sungwoo Choi, Jeongrok Oh, Chulsoo Yoon
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Publication number: 20240152753Abstract: Disclosed is a processor implemented method that includes calculating a quantization error for each channel of a neural network using activation data output from a first layer of the neural network and a quantization scale of a second layer connected to the first layer, calculating a final loss using a regularization loss term determined based on the quantization error for each channel, and updating a batch norm parameter of the first layer in a direction to decrease the final loss.Type: ApplicationFiled: October 27, 2023Publication date: May 9, 2024Applicants: SAMSUNG ELECTRONICS CO., LTD., IUCF-HYU(Industry-University Cooperation Foundation Hanyang University)Inventors: Jungwook CHOI, Seongmin PARK
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Publication number: 20240107831Abstract: A display apparatus includes a substrate including a display area and a peripheral area, a data line arranged in the display area and extending in a first direction, a first horizontal connection line connected to the data line in the display area and extending in a second direction intersecting the first direction, a first vertical connection line in the display area, extending in the first direction, and having an end electrically connected to the first horizontal connection line and another end disposed closer to the peripheral area than the end, and a second horizontal connection line in the display area, extending in the second direction, and having an end electrically connected to the another end of the first vertical connection line and another end disposed farther from the data line than the end.Type: ApplicationFiled: March 30, 2023Publication date: March 28, 2024Applicant: Samsung Display Co., Ltd.Inventors: Kiho Bang, Seunghwan Cho, Seongmin Wang, Jiwon Sohn, Wonsuk Choi
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Publication number: 20240079533Abstract: A light emitting device includes a first light emitter including a first light emitting chip emitting first blue light and at least one among a first phosphor and a second phosphor, the first light emitter being configured to emit second blue light, and a second light emitter including a second light emitting chip emitting third blue light and at least one among a third phosphor and a fourth phosphor, the second light emitter being configured to emit fourth blue light, wherein a ratio of an intensity of a peak wavelength of the fourth blue light to an intensity of a peak wavelength of the second blue light is greater than or equal to 0.6.Type: ApplicationFiled: August 21, 2023Publication date: March 7, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seongmin KIM, Jeongeun YUN, Jeongrok OH, Sungwoo CHOI, Chulsoo YOON
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Publication number: 20230417804Abstract: A voltage measuring device for measuring a voltage by using a Pockels cell includes a Pockels cell changing a refractive index of incident light based on an applied electric field, at least one non-polarized beam splitter splitting an incident beam, a first polarizing plate polarizing a first beam split by the at least one non-polarized beam splitter, a first light detector detecting light polarized based on the first polarizing plate, a ¼ wave plate elliptically polarizing and outputting a second beam split by the at least one non-polarized beam splitter, a second polarizing plate polarizing the elliptically polarized second beam, a second light detector detecting light polarized based on the ¼ wave plate and the second polarizing plate, and a controller configured to measure a voltage based on a first light intensity determined by the first light detector and a second light intensity determined by the second light detector.Type: ApplicationFiled: March 18, 2021Publication date: December 28, 2023Applicants: AGENCY FOR DEFENSE DEVELOPMENT, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sunghoon HONG, Hyun Jong WOO, Youngchul GHIM, Seongmin CHOI, Donggeun LEE, Alvin Amry SUGIANTO
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Publication number: 20220358262Abstract: Provided is a processor configured to compute elements affecting an optimization matrix in connection with a first measurement, among elements of a Hessian matrix, instead of generating a whole Hessian matrix for a map point and a camera pose based on all measurements, and accumulate the computed elements over the optimization matrix used to perform optimization operations in relation to states of the map point and the camera pose.Type: ApplicationFiled: October 27, 2021Publication date: November 10, 2022Applicants: SAMSUNG ELECTRONICS CO., LTD., University of Seoul Industry Cooperation FoundationInventors: Myungjae JEON, Kichul KIM, Namseop KWON, Hongseok LEE, San KIM, Wooseok SEONG, Seongmin CHOI
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Patent number: 11393401Abstract: A data driving circuit, controller, and display device include a compensation table for compensating for degradation of a light emitting subpixel. The compensation table may be generated or updated based on degradation of a dummy subpixel. The dummy subpixel is disposed in a non-active area, and has the same or similar characteristics to those of the light emitting subpixel as the display device is driven. Degree of degradation of the dummy subpixel may be sensed, and by degrading the dummy subpixel more rapidly than the light emitting subpixel, accuracy of sensing may be enhanced. The degradation compensation is performed in real time during driving of the display device, and is based on the compensation table generated or updated using the degree of degradation sensed on the dummy subpixel.Type: GrantFiled: October 14, 2021Date of Patent: July 19, 2022Assignee: LG Display Co., Ltd.Inventors: Seongmin Choi, Hyojung Park, SeungHyuck Lee
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Publication number: 20220122540Abstract: A data driving circuit, controller, and display device include a compensation table for compensating for degradation of a light emitting subpixel. The compensation table may be generated or updated based on degradation of a dummy subpixel. The dummy subpixel is disposed in a non-active area, and has the same or similar characteristics to those of the light emitting subpixel as the display device is driven. Degree of degradation of the dummy subpixel may be sensed, and by degrading the dummy subpixel more rapidly than the light emitting subpixel, accuracy of sensing may be enhanced. The degradation compensation is performed in real time during driving of the display device, and is based on the compensation table generated or updated using the degree of degradation sensed on the dummy subpixel.Type: ApplicationFiled: October 14, 2021Publication date: April 21, 2022Inventors: Seongmin Choi, Hyojung Park, SeungHyuck Lee
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Publication number: 20220122548Abstract: Embodiments of the disclosure relate to a controller and a display device. As the display device is driven, the stress value is accumulated, and a compensation value based on the accumulated stress value is applied upon driving the display. Thus, it is possible to compensate for degradation of subpixels in real time. Further, the amount of degradation of the subpixel is sensed at a preset time, and the stress value is corrected based on the degradation amount sensing data. Thus, it is possible to enhance the accuracy of real-time compensation for degradation of subpixels while minimizing sensing of degradation of subpixels.Type: ApplicationFiled: August 27, 2021Publication date: April 21, 2022Inventors: JinTaek CHOI, Hyojung PARK, Seongmin CHOI
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Patent number: 9551913Abstract: There are provided a transparent display apparatus and a method for controlling the same. The transparent display apparatus includes a transparent display unit that includes an emissive area and a transmissive area and is configured to display a video, an optical sensor configured to measure the amount of light, and a light shielding unit that is disposed on one surface of the transparent display unit and is configured to adjust transmittance on the basis of the amount of light.Type: GrantFiled: December 11, 2015Date of Patent: January 24, 2017Assignee: LG Display Co., Ltd.Inventors: IlHo Kim, YoungHoon Noh, ByungChun Yu, Seongmin Choi
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Publication number: 20160097962Abstract: There are provided a transparent display apparatus and a method for controlling the same. The transparent display apparatus includes a transparent display unit that includes an emissive area and a transmissive area and is configured to display a video, an optical sensor configured to measure the amount of light, and a light shielding unit that is disposed on one surface of the transparent display unit and is configured to adjust transmittance on the basis of the amount of light.Type: ApplicationFiled: December 11, 2015Publication date: April 7, 2016Inventors: IlHo Kim, YoungHoon Noh, ByungChun Yu, Seongmin Choi
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Patent number: 9262964Abstract: Provided is an organic light emitting diode (OLED) display device including a plurality of pixels to display images, each of the pixels including an OLED, a driving transistor connected to the OLED, and a switching transistor configured to supply data signals to the OLED, the device including: a sensor configured to sense a change amount of a mobility of the driving transistor; a compensation value calculator configured to obtain a change amount of a threshold voltage of the driving transistor based on the sensed change amount of the mobility; and a data compensator configured to adjust the data signals based on the sensed change amount of mobility and the obtained change amount of the threshold voltage.Type: GrantFiled: November 19, 2014Date of Patent: February 16, 2016Assignee: LG DISPLAY CO., LTD.Inventors: Woojin Nam, Jintaek Choi, Seongmin Choi
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Patent number: 9240162Abstract: There are provided a transparent display apparatus and a method for controlling the same. The transparent display apparatus includes a transparent display unit that includes an emissive area and a transmissive area and is configured to display a video, an optical sensor configured to measure the amount of light, and a light shielding unit that is disposed on one surface of the transparent display unit and is configured to adjust transmittance on the basis of the amount of light.Type: GrantFiled: December 24, 2013Date of Patent: January 19, 2016Assignee: LG Display Co., Ltd.Inventors: IlHo Kim, YoungHoon Noh, ByungChun Yu, Seongmin Choi
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Publication number: 20150154908Abstract: Provided is an organic light emitting diode (OLED) display device including a plurality of pixels to display images, each of the pixels including an OLED, a driving transistor connected to the OLED, and a switching transistor configured to supply data signals to the OLED, the device including: a sensor configured to sense a change amount of a mobility of the driving transistor; a compensation value calculator configured to obtain a change amount of a threshold voltage of the driving transistor based on the sensed change amount of the mobility; and a data compensator configured to adjust the data signals based on the sensed change amount of mobility and the obtained change amount of the threshold voltage.Type: ApplicationFiled: November 19, 2014Publication date: June 4, 2015Applicant: LG DISPLAY CO., LTD.Inventors: Woojin NAM, Jintaek CHOI, Seongmin CHOI
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Publication number: 20140184577Abstract: There are provided a transparent display apparatus and a method for controlling the same. The transparent display apparatus includes a transparent display unit that includes an emissive area and a transmissive area and is configured to display a video, an optical sensor configured to measure the amount of light, and a light shielding unit that is disposed on one surface of the transparent display unit and is configured to adjust transmittance on the basis of the amount of light.Type: ApplicationFiled: December 24, 2013Publication date: July 3, 2014Applicant: LG Display Co., Ltd.Inventors: IlHo Kim, YoungHoon Noh, ByungChun Yu, Seongmin Choi