Patents by Inventor Yun-Ho Choi
Yun-Ho 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: 9166578Abstract: There are provided a pulse generator capable of securing a maximum transfer rate of an IR-UWB signal, while maintaining low power consumption characteristics of an all-digital scheme, and a method for generating a fine pulse. A bandwidth of a fine pulse is determined by adjusting a difference in delay time between two adjacent pulses and a pulse is generated by selecting only one of a rising edge and a falling edge of an input pulse, and thus there is no need to remove an unnecessary batch of pulses afterwards and a transfer rate is enhanced.Type: GrantFiled: June 10, 2014Date of Patent: October 20, 2015Assignee: UNIST ACADEMY-INDUSTRY RESEARCH CORPORATIONInventors: Franklin Bien, Kyung Min Na, Yun Ho Choi, Sai Kiran Oruganti
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Publication number: 20150249861Abstract: A broadcasting signal receiving apparatus a method of controlling the same are provided. The broadcasting signal receiving apparatus includes: a signal receiver configured to receive a broadcasting signal including a stream of data for displaying an image; a buffer configured to store the stream; an interface configured to interface the buffer and a storage device including a storage space for reproducing the stream; a controller configured to control the interface to receive storage information about the stream from the buffer, to receive the stream from the buffer based on the received storage information, and to store the stream in the storage device.Type: ApplicationFiled: February 19, 2015Publication date: September 3, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ki-suk KIM, Hee-beom KANG, Hyeoung-ki KIM, Ho-shin SON, Jung-yeon WOO, Woo-sung CHUNG, Yun-ho CHOI
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Patent number: 9118282Abstract: Provided are a power amplifier and a method thereof. The power amplifier power amplifier includes: a main amplifying unit receiving power; an auxiliary amplifying unit connected in parallel to the main amplifying unit; and a Balun transformer combined with the main amplifying unit and the auxiliary amplifying unit. Respectively different bias voltages are applied to the main amplifying unit and the auxiliary amplifying unit.Type: GrantFiled: May 21, 2012Date of Patent: August 25, 2015Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Yun Ho Choi, Nam Sik Ryu
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Publication number: 20150229632Abstract: A security device and controlling method thereof are provided. The security device includes: a storage configured to store a plurality of passwords, wherein a complexity of the passwords increases according to a security level; an inputter configured to receive a password input by a user; a detector configured to detect a security level of the received password by comparing the received password and the plurality of passwords stored in the storage; and a controller configured to provide an authority to access an element of an electronic device connected with the security device according to the detected security level.Type: ApplicationFiled: September 24, 2014Publication date: August 13, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Byong-ki LEE, Yun-ho CHOI
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Publication number: 20150137877Abstract: Provided is a bias circuit. The bias circuit includes: a first resistor connected between a ground terminal and a first node; a first bias transistor having a drain connected to the first node and a source connected to a second node; a second bias transistor having a drain connected to the second node and a source connected to a negative voltage terminal; a third bias transistor having a drain connected to the ground terminal and a source connected to a third node; and a second resistor connected between the third node and the negative voltage terminal, wherein a gate of the first bias transistor is connected to the second node; a gate of the second bias transistor is connected to the negative voltage terminal; a gate of the third bias transistor is connected to the first node; and a gate bias voltage signal is outputted through the third node.Type: ApplicationFiled: June 19, 2014Publication date: May 21, 2015Inventors: Yun Ho CHOI, Youn Sub NOH, Hong Gu JI, Jin Cheol JEONG, In Bok YOM
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Patent number: 9035865Abstract: A gate driving circuit for driving a display apparatus is disclosed. The gate driving circuit properly generates gate voltages despite inconsistent transistor characteristics due to processing and environment by maintaining certain nodes in reliably high impedance states.Type: GrantFiled: March 11, 2011Date of Patent: May 19, 2015Assignee: Samsung Display Co., Ltd.Inventors: Sang-Jin Pak, Joo-Hyung Lee, Yun-Ho Choi, Jin-Woo Park
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Publication number: 20150084852Abstract: A display apparatus and a method for recognizing a motion thereof are provided. The method includes setting an active area in which the externally input motion is recognizable, wherein the active area corresponds to a portion on a screen of the display apparatus, changing the display apparatus from an overall area motion recognition mode to a partial area motion recognition mode configured to only recognize the externally input motion in the active area, recognizing the externally input motion in the active area, and disabling the partial area motion recognition mode in response to the recognized externally input motion being a disabling motion configured to disable the partial area motion recognition mode.Type: ApplicationFiled: May 5, 2014Publication date: March 26, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Chang-ho SHON, Jae-hyun BAE, Yun-ho CHOI
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Patent number: 8964978Abstract: Provided are a method and apparatus for effectively fixing scrambled content. The method includes checking fixing information for a program map table (PMT) packet of packets constituting the content, the fixing information being used to fix a transformed part of the content; extracting location information of a next PMT packet containing fixing data for fixing the transformed part of the content from the fixing information of the PMT packet; and fixing the transformed part of the content by using the fixing data in the next PMT packet indicated by the extracted location information. Accordingly, it is possible to easily detect a location of the content, which stores the fixing information, thereby expediting fixing of the transformed content.Type: GrantFiled: March 25, 2013Date of Patent: February 24, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-kuk You, Hyun-kwon Chung, Jun-bum Shin, Yun-ho Choi, Su-hyun Nam
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Publication number: 20140361822Abstract: There are provided a pulse generator capable of securing a maximum transfer rate of an IR-UWB signal, while maintaining low power consumption characteristics of an all-digital scheme, and a method for generating a fine pulse. A bandwidth of a fine pulse is determined by adjusting a difference in delay time between two adjacent pulses and a pulse is generated by selecting only one of a rising edge and a falling edge of an input pulse, and thus there is no need to remove an unnecessary batch of pulses afterwards and a transfer rate is enhanced.Type: ApplicationFiled: June 10, 2014Publication date: December 11, 2014Inventors: Franklin Bien, Kyung Min NA, Yun Ho CHOI, Sai Kiran Oruganti
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Patent number: 8774747Abstract: A radio frequency receiver of the present invention removes out-of-band jamming signals and interference signals without SAW filters. The radio frequency receiver includes: a low noise amplifier amplifying a signal received through an antenna; a second order intermodulation cancellation unit removing second order intermodulation caused by an out-of-band jamming or interference signal included in the signal output from the low noise amplifier; a passive mixer unit converting a frequency of the signal output from the second order intermodulation cancellation unit; and a low pass filter unit removing an out-of-band jamming or interference signal included in the signal output from the passive mixer unit and delivering the signal with the out-of-band jamming or interference signal removed therefrom to a transimpedance amplifier.Type: GrantFiled: June 5, 2012Date of Patent: July 8, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Seok-bong Hyun, Bong Hyuk Park, Yun Ho Choi, Jae Ho Jung
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Publication number: 20140149644Abstract: An electronic apparatus includes a function unit which stores firmware, a communication interface unit which receives new firmware to be updated, a controller which converts an operation mode of the electronic apparatus to a power-saving mode, and an update unit which updates firmware of the function unit using the new firmware received in a process of restoring an operation mode of the electronic apparatus from a power-saving mode to a general mode.Type: ApplicationFiled: November 7, 2013Publication date: May 29, 2014Applicant: Samsung Electronics Co., Ltd.Inventors: Sun-a PARK, Yun-ho CHOI
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Patent number: 8675715Abstract: A high-bandwidth communication modem such as an ultra wideband (UWB) communication modem or a high-giga wideband (HGWB) modem includes an interface configured to transceive data in connection with a host device, a baseband processor configured to process, in a parallel manner, a baseband signal being transceived between the interface and a parallel/serial converter, the parallel/serial converter configured to combine a parallel signal into a serial signal and output the serial signal, and separate a serial signal into a parallel signal and output the parallel signal, a radio frequency (RF) processor configured to reduce a frequency of a received UWB or HGWB signal and transmit the frequency-reduced signal to the parallel/serial converter, and increase a frequency of the serial signal received from the parallel/serial converter and transmit the frequency-increased signal to a directional antenna, and the directional antenna configured to transceive a wireless signal by forming a directional beam and control aType: GrantFiled: December 23, 2010Date of Patent: March 18, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Mun Geon Kyeong, Yun Ho Choi, Woo Yong Lee
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Patent number: 8625654Abstract: A pulse generator of an ultra wideband (UWB) system includes: a plurality of delay cells for receiving pulses, delaying the received pulses for a predetermined time, and outputting the delayed pulses; and an edge combiner connected to output ends of the plurality of delay cells for receiving the delayed pulses from the plurality of delay cells, outputting fine pulses corresponding to the delayed time, and generating one impulse signal with the outputted fine pulses. The edge combiner includes a plurality of XOR gates for receiving a first delayed pulse and a second delayed pulse from an nth delay cell and an (n+1)th delay cell among the plurality of delay cells and generating fine pulses, respectively, and an OR gate for receiving a first fine pulse and a second fine pulse respectively output from a first XOR gate and a second XOR gate included in the plurality of XOR gates.Type: GrantFiled: December 14, 2011Date of Patent: January 7, 2014Assignees: Electronics and Telecommunications Research Institute, Unist Academy-Industry Research CorporationInventors: Jin Doo Jeong, Hyung Soo Lee, Sangsung Choi, Franklin Bien, Yun ho Choi, Young su Kim
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Patent number: 8618858Abstract: A pulse generator is provided. The pulse generator includes: a time delayed pulse generation unit including a plurality of delay cells for receiving a first pulse having a first pulse width and outputting pulses delayed by a particular time delay value on the basis of one of a rising edge and a falling edge of the first pulse; an edge combiner configured to receive the plurality of time delayed pulses from the time delayed pulse generation unit and generate second pulses having a second pulse width; and a channel selector configured to regulate the number of outputs of the second pulses generated by the edge combiner.Type: GrantFiled: December 2, 2011Date of Patent: December 31, 2013Assignees: Electronics and Telecommunications Research Institute, Unist Academy—Industry CorporationInventors: Jae Hwan Kim, Hyung Soo Lee, Sang Sung Choi, Kyeong Deok Moon, Yun Ho Choi, Young Su Kim, Franklin Bien
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Publication number: 20130275739Abstract: An electronic apparatus includes a non-volatile memory, a volatile memory to store an operation of the operating system, a user interface unit to receive an end command to terminate an operation of the operating system, and a control unit to change an operation mode of the operating system to a log off mode and to store operating system data of the log off mode stored in the volatile memory in the non-volatile memory and to cut off power supplied to the electronic apparatus, if the end command is input.Type: ApplicationFiled: January 15, 2013Publication date: October 17, 2013Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Hyung-geun KIM, Jeom-jin CHANG, Yun-ho CHOI
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Publication number: 20130135048Abstract: A radio frequency receiver of the present invention removes out-of-band jamming signals and interference signals without SAW filters. The radio frequency receiver includes: a low noise amplifier amplifying a signal received through an antenna; a second order intermodulation cancellation unit removing second order intermodulation caused by an out-of-band jamming or interference signal included in the signal output from the low noise amplifier; a passive mixer unit converting a frequency of the signal output from the second order intermodulation cancellation unit; and a low pass filter unit removing an out-of-band jamming or interference signal included in the signal output from the passive mixer unit and delivering the signal with the out-of-band jamming or interference signal removed therefrom to a transimpedance amplifier.Type: ApplicationFiled: June 5, 2012Publication date: May 30, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Seok-bong HYUN, Bong Hyuk Park, Yun Ho Choi, Jae Ho Jung
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Publication number: 20130127528Abstract: Provided are a power amplifier and a method thereof. The power amplifier power amplifier includes: a main amplifying unit receiving power; an auxiliary amplifying unit connected in parallel to the main amplifying unit; and a balloon transformer combined with the main amplifying unit and the auxiliary amplifying unit. Respectively different bias voltages are applied to the main amplifying unit and the auxiliary amplifying unit.Type: ApplicationFiled: May 21, 2012Publication date: May 23, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Yun Ho CHOI, Nam Sik Ryu
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Patent number: 8428256Abstract: Provided are a method and apparatus for effectively fixing scrambled content. The method includes checking fixing information for a program map table (PMT) packet of packets constituting the content, the fixing information being used to fix a transformed part of the content; extracting location information of a next PMT packet containing fixing data for fixing the transformed part of the content from the fixing information of the PMT packet; and fixing the transformed part of the content by using the fixing data in the next PMT packet indicated by the extracted location information. Accordingly, it is possible to easily detect a location of the content, which stores the fixing information, thereby expediting fixing of the transformed content.Type: GrantFiled: July 19, 2006Date of Patent: April 23, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Young-kuk You, Hyun-kwon Chung, Jun-bum Shin, Yun-ho Choi, Su-hyun Nam
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Patent number: 8366827Abstract: Disclosed are chamber inserts and apparatuses using the chamber inserts. A chamber insert may include a cylindrical body portion including a top end portion and a bottom end portion, a first protruding portion extending outwardly from a first portion of the cylindrical body portion, the first portion positioned circumferentially along the cylindrical body portion and a second protruding portion extending outwardly from a second portion of the cylindrical body portion, the second portion positioned circumferentially along less than all of the cylindrical body portion. In another example, the chamber insert may include a cylindrical body portion including a top end portion and a bottom end portion, the cylindrical body portion including a slit and at least one hole, the slit and the at least one hole positioned circumferentially along the cylindrical body portion and a first protruding portion extending outwardly from a first portion of the cylindrical body portion.Type: GrantFiled: June 7, 2006Date of Patent: February 5, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jung-Hun Seo, Jin-Gi Hong, Kyung-Bum Koo, Yun-Ho Choi, Eun-Taeck Lee, Hyun Chul Kwun
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Patent number: 8281115Abstract: A security method and a security apparatus are disclosed which use a self-generated encryption key. The security method includes the steps of: generating an encryption key; decrypting pre-encrypted data using a pre-stored manufacturer key; and re-encrypting the decrypted data using the encryption key. The security method and apparatus minimize external leakage of data by self-generating the unique encryption key. Since the encryption keys are unique in each set, set binding is possible.Type: GrantFiled: April 2, 2007Date of Patent: October 2, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Yun-ho Choi, Cheul-hee Hahm, Chang-yong Heo