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公开(公告)号：US12027764B2
公开(公告)日：2024-07-02
申请号：US18117577
申请日：2023-03-06
发明人： Hyoseok Na , Jooseung Kim , Hyunseok Choi
CPC分类号： H01Q1/40 , G05F1/46 , H03F3/195 , H03F2200/105 , H03F2200/451
摘要： An example electronic device includes an antenna; a switching regulator; a communication chip including an amplifier, a first linear regulator operably connected to the amplifier and the switching regulator and configured to be supplied with a first voltage from the switching regulator, and a second linear regulator operably connected to the amplifier and the switching regulator and configured to be supplied with a second voltage higher than the first voltage from the switching regulator, the communication chip configured to transmit a radio-frequency signal outside of the electronic device through the antenna; and a control circuit. The control circuit is configured to produce an envelope of an input signal input to the amplifier in connection with the radio-frequency signal and to provide the produced envelope to at least one of the first linear regulator or the second linear regulator. The first linear regulator is configured to provide a third voltage corresponding to the envelope to the amplifier using the first voltage based on the envelope having a voltage in a first range. The second linear regulator is configured to provide a fourth voltage higher than the third voltage to the amplifier using the second voltage based on the voltage of the envelope being in a second range including values larger than values included in the first range.
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公开(公告)号：US11621677B2
公开(公告)日：2023-04-04
申请号：US17127064
申请日：2020-12-18
发明人： Hyoseok Na , Jooseung Kim , Jihoon Kim , Sanghun Sim , Namjun Cho , Hyunseok Choi
IPC分类号： H03F1/52 , H04B1/3827 , H03D7/00 , H03L7/099 , H03F3/24
摘要： An apparatus and a method are provided for, in an electronic device which generates a reference signal having a reference frequency, mixes the reference signal to an input signal for transmission, and amplifies power, outputting a control signal for turning off amplifying the power, if a frequency of a signal acquired at an arbitrary point after generating the reference signal or mixing the signals before amplifying the power is out of a designated frequency band, thus preventing burnout of a power amplifier.
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公开(公告)号：US11600914B2
公开(公告)日：2023-03-07
申请号：US17102955
申请日：2020-11-24
发明人： Hyoseok Na , Jooseung Kim , Hyunseok Choi
摘要： Various embodiments disclose a method and a device. The device includes: an antenna; a switching regulator; a communication chip including an amplifier, a first linear regulator operably connected to the amplifier and the switching regulator and configured to be supplied with a first voltage from the switching regulator, and a second linear regulator operably connected to the amplifier and the switching regulator and configured to be supplied with a second voltage higher than the first voltage from the switching regulator, the communication chip configured to transmit a radio-frequency signal outside of the electronic device through the antenna; and a control circuit. The control circuit is configured to produce an envelope of an input signal input to the amplifier in connection with the radio-frequency signal and to provide the produced envelope to at least one of the first linear regulator or the second linear regulator. The first linear regulator is configured to provide a third voltage corresponding to the envelope to the amplifier using the first voltage based on the envelope having a voltage in a first range. The second linear regulator is configured to provide a fourth voltage higher than the third voltage to the amplifier using the second voltage based on the voltage of the envelope being in a second range including values larger than values included in the first range.
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公开(公告)号：US11306182B2
公开(公告)日：2022-04-19
申请号：US16354829
申请日：2019-03-15
IPC分类号： C08G73/10 , G02F1/13363 , G02F1/1337
摘要： An oligomer including two ends and a main chain located between the two ends, a group represented by Chemical Formula 1 at one end and a structural unit represented by Chemical Formula 2 or Chemical Formula 3 in the main chain: wherein, in Chemical Formulae 1 to 3, R1, Ar1, and Ar2 are the same as defined in the detailed description.
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公开(公告)号：US10808080B2
公开(公告)日：2020-10-20
申请号：US16048700
申请日：2018-07-30
发明人： Dmitry Androsov , Changki Kim , Kalinina Fedosya , Hyunseok Choi
IPC分类号： C08G73/16 , C07D307/89 , C08G73/10 , G02B5/30 , G02B1/04 , C09D179/08 , H01L51/52 , G02F1/13363
摘要： A monomer is represented by Chemical Formula 1: wherein, in Chemical Formula 1, R1, R2, o, p, L1, A1, Ra, m, and n are the same as defined in the detailed description.
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公开(公告)号：US10386672B2
公开(公告)日：2019-08-20
申请号：US15839163
申请日：2017-12-12
发明人： Sangah Gam , Beom Seok Kim , Hye Young Kong , Hyunseok Choi
IPC分类号： G02B6/02 , G02F1/1335 , G02F1/1343 , G02F1/13363
摘要： A liquid crystal display includes a light source, lower and upper substrates facing each other and on the light source, a liquid crystal layer between the lower and upper substrates, an upper polarization layer between the upper substrate and the liquid crystal layer, an upper phase difference layer between the liquid crystal layer and the upper polarization layer and having refractive indexes satisfying the following inequation: nx1≥ny1>nz1, a lower polarization layer disposed between the light source and the lower substrate, and a lower phase difference layer disposed between the light source and the lower substrate and having refractive indexes satisfying the following inequation: nx2>ny2 and nx2>nz2, where a thickness direction retardation of the upper phase difference layer satisfies the following inequation: (−0.6×Rth,cell+60)×navg−210≤Rth1≤(−0.6×Rth,cell+260)×navg−420.
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公开(公告)号：US09766384B2
公开(公告)日：2017-09-19
申请号：US14962797
申请日：2015-12-08
发明人： Koh Kamada , Tsuyoshi Ohyama , Eun Sung Lee , Hyunseok Choi , Seunghyun Lee
CPC分类号： G02B5/3083 , G02B5/3016 , H01L27/3232 , H01L51/5281
摘要： An organic light emitting device includes an anti-reflection film including a polarizer and a compensation film positioned on the polarizer and including a liquid crystal layer which includes liquid crystals oriented in a direction tilting obliquely with respect to a surface of the liquid crystal layer extending in a horizontal direction in a cross sectional view, tilt angles of the liquid crystals are gradually larger from the first side to the second side, a maximum tilt angle of the liquid crystals with respect to the surface of the liquid crystal layer is from about 15° to about 80°, and in-plane retardation (Re) of the liquid crystal layer for incident light of a 450 nm wavelength and a 550 nm wavelength satisfies a Relationship 1.
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8.发明授权公开(公告)号：US11843398B2
公开(公告)日：2023-12-12
申请号：US17561101
申请日：2021-12-23
发明人： Hyunseok Choi , Jooseung Kim , Namjun Cho , Hyoseok Na
CPC分类号： H04B1/04 , H03F3/245 , H03F2200/294 , H03F2200/451 , H04B2001/0408
摘要： Disclosed is a voltage protection circuit for preventing power amplifier burnout in an electronic device. The electronic device includes a power amplifier (PA) configured to amplify a transmission signal, a switch configured to set a path of a signal outputted from the PA, a bias control circuit configured to control the supply of a bias current driving the PA, and a voltage protection circuit configured to provide a main control signal for turning off the PA earlier than turning off the switch based on a battery voltage providing a driving power of the electronic device, and forward the main control signal to the bias control circuit, wherein, in response to receiving the main control signal instructing to turn off the PA from the voltage protection circuit, the bias control unit stops the supply of the bias current driving the PA.
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9.发明授权公开(公告)号：US11456797B2
公开(公告)日：2022-09-27
申请号：US17023955
申请日：2020-09-17
发明人： Jooseung Kim , Namjun Cho , Hyoseok Na , Hyunseok Choi
摘要： The disclosure relates to a device and a method for efficiently detecting signals when signals of a plurality of frequency bands are simultaneously transmitted and/or received.
An electronic device according to various embodiments of the disclosure includes: a processor, a plurality of couplers configured to detect signals of a plurality of frequency bands being simultaneously transmitted and/or received, a plurality of first switches connected to at least parts of the plurality of couplers and configured to adjust directions of the signals being detected, a plurality of second switches connected to the first switches and configured to block signals being output from the first switches, and a third switch connected to the plurality of second switches and configured to select one of the plurality of second switches, wherein the processor is configured to control the first switches, the second switches, and the third switch to detect one of the signals being simultaneously transmitted and/or received.-
公开(公告)号：US11385705B2
公开(公告)日：2022-07-12
申请号：US16958842
申请日：2018-12-24
发明人： Hyunseok Choi , Cheulhee Hahm , Yoojin Park
IPC分类号： G06F1/00 , G06F1/3234 , G06F1/3218 , G06F1/3225 , G06F1/3203
摘要： A display apparatus and an operation method thereof are provided. The display apparatus includes: a volatile memory; a nonvolatile memory; and a processor configured to: determine stability of a system for the display apparatus; when a power-off input for the display apparatus is received, if the system is determined to be stable, enter a power-saving mode while maintaining power supply to the volatile memory in which execution data regarding an application currently being executed is stored; and if the system is determined to be unstable, perform power-off processing after storing execution status information of at least one application being executed in the nonvolatile memory, perform booting to execute the application by using application execution status information stored in the nonvolatile memory, and store the execution data regarding the executed application in the volatile memory and then enter the power saving mode while maintaining the power supply to the volatile memory.
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