Patents by Inventor An Na Choi

An Na 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).

  • Publication number: 20110316144
    Abstract: A heat sink includes a first adhesive layer, and a heat dissipation layer disposed on the first adhesive layer, and has ventilation ports that extend therethrough including through the first adhesive layer and the heat dissipation layer. The heat sink forms an outermost part of a semiconductor package. Thus, when the heat sink is bonded via its adhesive layer to underlying structure during a manufacturing process, the ventilation ports allow air to pass therethrough. As a result, air is not trapped in the form of bubbles between the heat sink and the underlying structure.
    Type: Application
    Filed: June 13, 2011
    Publication date: December 29, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Wook Yoo, Kyoung-Sei Choi, Eun-Seok Cho, Mi-Na Choi, Hee-Jung Hwang, Se-Ran Bae
  • Publication number: 20110304763
    Abstract: An image sensor chip, a camera module, and devices incorporating the image sensor chip and camera module include a light receiving unit on which light is incident, a logic unit provided to surround the light receiving unit, and an electromagnetic wave shielding layer formed on the logic unit and not formed on the light receiving unit.
    Type: Application
    Filed: April 27, 2011
    Publication date: December 15, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Mi-Na Choi, Kyoung-Sei Choi, Hee-Seok Lee, Yong-Hoon Kim, Hee-Jung Hwang, Se-Ran Bae
  • Publication number: 20110285890
    Abstract: A camera module has a lens unit including a lens, a first chip having an image region on which an image is formed from light having passed through the lens unit, a housing enclosing side surfaces of the lens unit and the first chip, a second chip and at least one printed circuit board. The chips are mounted to the at least one printed circuit board.
    Type: Application
    Filed: March 29, 2011
    Publication date: November 24, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Mi-Na Choi, Kyoung-Sei Choi, Se-Ran Bae
  • Publication number: 20110215908
    Abstract: Disclosed are a radio secure reader and a radio secure tag for supporting a secure mode and a normal mode. The radio secure reader for controlling an operation mode of the radio secure tag may include a reader modem to receive the operation mode from the radio secure tag, and a reader processing unit to identify the received operation mode as a normal mode or a secure mode, and to control the radio secure tag based on the identified operation mode.
    Type: Application
    Filed: March 7, 2011
    Publication date: September 8, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sang Yeoun LEE, Heyung Sub LEE, You Sung KANG, Kang Bok LEE, Su Na CHOI, Hyun Seok KIM, Dong Beom SHIN, Doo Ho CHOI
  • Publication number: 20110037568
    Abstract: Disclosed are an RFID reader, an RFID tag, and a controlling method thereof. The RFID tag may include a state information generator to generate state information of the RFID tag, a receiver to receive an activation command including reference state information of the RFID tag, and a controller to activate the RFID tag based on the state information and the reference state information. The RFID tag may be selectively activated according to an inner state of the RFID tag.
    Type: Application
    Filed: April 22, 2009
    Publication date: February 17, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyunseok Kim, Heyung Sub Lee, Sang Yeoun Lee, Dong-Beom Shin, Su Na Choi, Nak Seon Seong, Cheol Sig Pyo, Jong-Suk Chae, Preishuber-Pfluegl Di Josef, Janek Di Alex, Tschische Di David
  • Publication number: 20100092048
    Abstract: A fingerprint information storage apparatus includes a fingerprint information generating unit that extracts minutiae information from an authenticated user's fingerprint image and generates fingerprint information by inserting chaff minutiae information into the extracted minutiae information, a fingerprint information distributing unit that classifies the fingerprint information according to the extent that minutiae are distributed relative to the center of the fingerprint and distributively outputs the fingerprint information classified according to the distribution, and a first fingerprint information storage unit and a second fingerprint information storage unit that store the fingerprint information and distributively output according to the distribution, wherein the authenticated user's fingerprint information registered in the first fingerprint information storage unit is partially aligned and input fingerprint information is converted based on the information so that the converted input fingerprint i
    Type: Application
    Filed: March 24, 2009
    Publication date: April 15, 2010
    Applicant: Industry-Academic Cooperation Foundation, Chosun University
    Inventors: Sung Bum Pan, Sung Jin Lim, Yong Wha Chung, Han Na Choi
  • Publication number: 20100014673
    Abstract: Disclosed are an RFID authentication apparatus having an authentication function and a method thereof. An RFID authentication method includes determining, by an authentication reader, an AES key using authentication information received from an authentication tag, generating an output key, encrypting a predetermined length of confirmation data by using the output key, transmitting the encrypted confirmation data to the authentication tag, receiving encrypted confirm response data corresponding to the confirmation data from the authentication tag to decrypt the encrypted confirm response data, and comparing the predetermined length of the confirmation data with the decrypted confirm response data to verify authenticity of the authentication tag.
    Type: Application
    Filed: July 20, 2009
    Publication date: January 21, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sang Yeoun LEE, Heyung Sub Lee, Su Na Choi, You Sung Kang, Hyunseok Kim, Kang Bok Lee, Seung II Myong, Hoe-Sung Yang, Cheol Sig Pyo, Jong-Suk Chae
  • Publication number: 20090273659
    Abstract: A mobile terminal including an input unit configured to receive an instruction from a first user to perform a video call communication with at least a second user, a display unit, a voice recognition module configured to recognize input voice statements conducted during the video call communication between the first and second users, and a controller configured to perform the video call communication between the first and second users based on the instruction from the first user, to control the display unit to display images of the first and second users, to detect a voice statement from the first user designating the second user by examining the voice statements recognized by the voice recognition module, and to emphatically display the image of the second user compared with the image of the first user based on the detected voice statement from the first user.
    Type: Application
    Filed: December 22, 2008
    Publication date: November 5, 2009
    Inventors: Hyun-Suk LEE, An-Na CHOI, Jin-Ho SON, Sun-Ju LEE, Jae-Do KWAK, Jong-Keun YOUN
  • Publication number: 20090153309
    Abstract: Disclosed is a synchronization method between a reader and tag according to an example embodiment, the method including: transmitting, by the reader, a first write command message to the tag at a first time; detecting, by the tag, the first write command message from the reader at a second time and transmitting a first response message to the reader in response to the first write message; transmitting, by the reader, a second write command message including first time information of the first time to the tag; and correcting, by the tag, a clock offset using a difference between the first time and the second time.
    Type: Application
    Filed: November 5, 2008
    Publication date: June 18, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hyunseok KIM, Su Na CHOI, Heyung Sub LEE, Nak Seon SEONG, Cheol Sig PYO, Jong-Suk CHAE
  • Publication number: 20090153329
    Abstract: Disclosed is a method of generating an activation code of a Radio Frequency Identification (RFID) tag including calculating K satisfying a condition that N is set to exceed 2k-1 and to be equal to or less than 2k, when classifying N number of objects through a plurality of RFID tags; and classifying the N number of objects by recording a code corresponding to each of the N number of objects in a K-bit region in an activation code of each RFID tag.
    Type: Application
    Filed: October 15, 2008
    Publication date: June 18, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hyunseok KIM, Su Na CHOI, Heyung Sub LEE, Nak Seon SEONG, Cheol Sig PYO, Jong-Suk CHAE
  • Publication number: 20080136603
    Abstract: A battery-powered RFID tag capable of reducing power consumption and a method of waking up the RFID tag are provided. The battery-powered RFID tag has an activated mode where a general command is detected by decoding a signal received from an RFID tag reader and the general command is executed and a standby mode where the general command is not detected. If a voltage of a continuous wave detected from the signal is equal to or higher than a predetermined voltage or if a wake-up command is detected from the signal, the state of the RFID tag is changed from the standby mode to the activated mode. In addition, the RFID tag is driven by a higher one between the voltage of the continuous wave and a voltage of a built-in battery.
    Type: Application
    Filed: October 19, 2007
    Publication date: June 12, 2008
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Su Na Choi, Hae Won Son, JunHo Yeo, Jae Young Jung, Jong Hyun Seo, Gil Young Choi, Cheol Sig Pyo, Jong Suk Chae
  • Publication number: 20080136594
    Abstract: Provided are a method and apparatus for stopping power supply to a radio frequency identification (RFID) system. The apparatus includes: a power supplier supplying power to a high RFID tag; an input unit rectifying and boosting an input predetermined frequency band signal and outputting a direct-current (DC) voltage signal; a wake-up determiner comparing a voltage of the DC voltage signal output from the input unit with a predetermined reference voltage and outputting a HIGH signal or a LOW signal; and a switch stopping power supply to the high RFID tag if the wake-up determiner outputs the LOW signal.
    Type: Application
    Filed: October 24, 2007
    Publication date: June 12, 2008
    Inventors: Jae-Young JUNG, Hae Won SON, Jun Ho YEO, Jong Hyun SEO, Su Na CHOI, Gil Young CHOI, Cheol Sig PYO
  • Patent number: 7254122
    Abstract: An apparatus for generating pilot beacon signals for handoff between base stations having a different frequency assignment FA in a code division multiple access CDMA radio communication system includes a PN code generating unit for generating inphase (I)-channel and quadrature (Q)-channel pseudo noise (PN) sequences; a pulse shaping unit for shaping an I-channel and Q-channel PN signal by filtering the I-channel and Q-channel PN sequences; an equalizing unit for equalizing phases of the I-channel PN signal and the Q-channel PN signal and generating an equalized I-channel signal and an equalized Q-channel signal; an interpolation filtering unit for converting frequencies of the equalized I-channel signal with the equalized Q-channel signal to intermediate frequencies (IF) and generating an IF I-channel signal and an IF Q-channel signal; a modulation unit for modulating IF I-channel and Q-channel signals and generating a modulated I-channel signal and a modulated Q-channel signal; a combining unit for combining
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: August 7, 2007
    Assignee: SK Telecom Co., Ltd.
    Inventors: An Na Choi, Jae Hwang Yu, Jun Mo Koo, Byung Moo Kim
  • Patent number: 7228106
    Abstract: A method and apparatus for adjusting usage of digital signal processing (DSP) in a handheld terminal receives reception level data and reception quality data from a network, compares the received reception level data value and reception quality data value with pre-stored basis values, and then adjusts present usage of DSP based on the comparison result. Through this method and apparatus, usage of digital signal processing elements in the terminal is automatically optimized, thereby providing stable communication service to users.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: June 5, 2007
    Assignee: LG Electronics Inc.
    Inventor: Ga-Na Choi
  • Publication number: 20040203449
    Abstract: A method and apparatus for adjusting usage of digital signal processing (DSP) in a handheld terminal receives reception level data and reception quality data from a network, compares the received reception level data value and reception quality data value with pre-stored basis values, and then adjusts present usage of DSP based on the comparison result. Through this method and apparatus, usage of digital signal processing elements in the terminal is automatically optimized, thereby providing stable communication service to users.
    Type: Application
    Filed: April 1, 2003
    Publication date: October 14, 2004
    Applicant: LG Electronics Inc.
    Inventor: Ga-Na Choi
  • Publication number: 20030214926
    Abstract: An apparatus for generating pilot beacon signals for handoff between base stations having a different frequency assignment FA in a code division multiple access CDMA radio communication system includes a PN code generating unit for generating inphase (I)-channel and quadrature (Q)-channel pseudo noise (PN) sequences; a pulse shaping unit for shaping an I-channel PN signal and a Q-channel PN signal by filtering the I-channel and Q-channel PN sequences; an equalizing unit for equalizing phases of the I-channel PN signal and the Q-channel PN signal and generating an equalized I-channel signal and an equalized Q-channel signal; an interpolation filtering unit for converting frequencies of the equalized I-channel signal with the equalized Q-channel signal to intermediate frequencies (IF) and generating an IF I-channel signal and an IF Q-channel signal; a modulation unit for modulating IF I-channel and Q-channel signals and generating a modulated I-channel signal and a modulated Q-channel signal; combining unit for
    Type: Application
    Filed: May 13, 2003
    Publication date: November 20, 2003
    Inventors: An Na Choi, Jae Hwang Yu, Jun Mo Koo, Byung Moo Kim
  • Patent number: 6205132
    Abstract: The present invention discloses a method for accessing a cell, and more particularly, to a method for acquiring an initial synchronization using two pilot channels in a CDMA (Code Division Multiple Access) communication system of an asynchronous or quasi-synchronous mode. In accordance with the present invention, a CDMA communication system of an quasi-synchronous mode comprises the steps of synchronizing the mobile station with a cluster pilot, and searching for cell pilots on the basis of the cluster synchronization channel set up by the cluster pilot, and synchronizing the mobile station with the cell pilot having a maximum sensitivity, whereby the mobile station is synchronized with the base station through the cluster pilot and the cell pilot.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: March 20, 2001
    Assignee: Korea Mobile Telecommunications Corp.
    Inventors: Een Kee Hong, Dong Ho Kim, Yeon Dae Yang, Byeong Chul Ahn, Yong Wan Park, Seong Moon Ryu, Tae Young Lee, An Na Choi
  • Patent number: D571317
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: June 17, 2008
    Assignee: Alti-electronics Co., Ltd.
    Inventors: You Na Choi, Jong Won Park, Chi Ok In
  • Patent number: D576114
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: September 2, 2008
    Assignee: Alti-Electronics Co., Ltd.
    Inventors: You Na Choi, Jong Won Park