Patents by Inventor Sang Yun Lee

Sang Yun Lee 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: 20090111241
    Abstract: A method includes steps of providing first and second substrates, and forming a bonding interface between them using a conductive bonding region. A portion of the second substrate is removed to form a mesa structure. A vertically oriented semiconductor device is formed with the mesa structure. A portion of the conductive bonding region is removed to form a contact. The vertically oriented semiconductor device is carried by the contact.
    Type: Application
    Filed: December 29, 2008
    Publication date: April 30, 2009
    Inventor: Sang-Yun Lee
  • Publication number: 20090081992
    Abstract: The present invention is to provide individual and payment information to a service server by recognizing whether the service server is to be trusted when individual identification information provided by a user is received from the service server. So, the invention provides an authentication method of the service server and a payment method by using the same, which can prevent the individual identification information and payment from being accessed by a distrusted server in wireless Internet.
    Type: Application
    Filed: October 11, 2006
    Publication date: March 26, 2009
    Applicant: SK TELECOM. CO., LTD.
    Inventors: Jun-Won Choi, Joo-Mun Lee, Sang-Yun Lee, Myung-Sung Lee, Jae-Boo Chung
  • Publication number: 20090041213
    Abstract: Disclosed herein are a system and method for transferring voice messages. The system includes a voice message server. When a voice message and called terminal information are transmitted from a calling terminal, the voice message server stores the voice message, searches for a connection route to the called terminal with reference to the called terminal information, and transmits a reception request signal to the called terminal. Furthermore, when the called terminal responds to the reception request signal, the voice message server reproduces the voice message. Furthermore, when the called terminal does not respond to the reception request signal and the reception request signal is forwarded to a different receiving object, the voice message server checks whether the route of the reception request signal has been changed and interrupts the transmission of the voice message. Accordingly, an additional communication charge may be avoided.
    Type: Application
    Filed: March 15, 2005
    Publication date: February 12, 2009
    Inventors: Hyuk-Hoon Kwon, Tae-Wook Park, Sang-Yun Lee, Hee-Hyeok Hahm
  • Publication number: 20090040021
    Abstract: The RFID system includes an RFID reader for sending information selected from among collision type information, idle type information, and readable type information, to all of the RFID tags depending on the number of signals in the corresponding time slot, and RFID tags for performing functions, in which, when information, indicating that a current time slot is a collision type, is fed back from the RFID reader, each of RFID tags selects one arbitrary value of either 0 or 1 and is assigned a time slot, in which a corresponding RFID tag will send a signal to the RFID reader, based on the selected value, a single tag group that caused a collision is divided into two sub-groups depending on the assigned time slots, and tags of the sub-groups send signals, including IDs thereof, to the RFID reader in different time slots for the respective sub-groups.
    Type: Application
    Filed: September 8, 2006
    Publication date: February 12, 2009
    Applicant: SK TELECOM CO., LTD.
    Inventors: Kyung-Ho Seo, Won-Jun Lee, Ji-Hoon Myung, Jin-Hee Yoon, Joo-Mun Lee, Sang-Yun Lee, Myung-Sung Lee
  • Patent number: 7489658
    Abstract: A dual stack mobile communication system is provided for building a single interworking network of an asynchronous network and a synchronous network. A single node is formed by combining the same kind nodes of the asynchronous network and the synchronous network, wherein the single node searches information for generating two output signal points according to a synchronous protocol and an asynchronous protocol in one input signal point according to the synchronous protocol or asynchronous protocol, and generates one output signal point.
    Type: Grant
    Filed: December 28, 2002
    Date of Patent: February 10, 2009
    Assignee: SK Telecom Co., Ltd.
    Inventors: Soo-Jin Kim, Hyung-Joon Cho, Hee-Hyeok Hahm, Sang-Yun Lee
  • Patent number: 7486032
    Abstract: In an apparatus for driving LED arrays, a dimming/size setter sets each of driving voltages for a plurality of red, green and blue LED arrays in response to at least one of a dimming signal and a size control signal inputted from outside. Each of red LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter. Each of green LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter. Also, each of blue LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: February 3, 2009
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Sang Yun Lee
  • Patent number: 7470142
    Abstract: A method of coupling substrates together includes steps of providing first and second substrates. The second substrate includes a conductive bonding region positioned on its surface. Heat is provided to the conductive bonding region to reduce its number of defects. The surface of the conductive bonding region is bonded to the first substrate so that the conductive bonding region and the first substrate are coupled together.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 30, 2008
    Inventor: Sang-Yun Lee
  • Patent number: 7470598
    Abstract: A method of forming a circuit includes providing a first substrate; positioning an interconnect region on a surface of the first substrate; providing a second substrate; positioning a device structure on a surface of the second substrate, the device structure including a stack of at least three doped semiconductor material layers; and bonding the device structure to the interconnect region.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 30, 2008
    Inventor: Sang-Yun Lee
  • Publication number: 20080315780
    Abstract: There is provided an integrated LED driving device including: a DC/DC converting part converting and outputting a DC voltage inputted from the outside by switching of a switch into a driving voltage of a magnitude suitable for driving a plurality of LED arrays; a constant current controlling part receiving at least one of information on the current flowing through the LED array and information on a voltage applied to the LED array by feed-back, the constant current controlling part including a PWM controller PWM-controlling a switching duty of the switch of the DC/DC converting part, and controlling a switching duty of each of the switches of the switching part to allow the current to flow through the LED array with a predetermined magnitude; and a control logic receiving a control signal by a user and controlling the PWM controller in response to the control signal.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 25, 2008
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sang Yun LEE, Chang Hoon BAEK, Do Hun KIM, Hyung Suk KIM
  • Patent number: 7465072
    Abstract: A backlight unit includes: at least one lamp; and a plurality of optical sheets on the at least one lamp, the plurality of optical sheets having a micro-lens sheet.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: December 16, 2008
    Assignee: LG Display Co., Ltd.
    Inventors: Young-Tae Hong, Sang-Yun Lee, Sung-Keun Lee
  • Publication number: 20080284346
    Abstract: There is provided a LED array driving apparatus for driving a light emitting array having a plurality of LEDs connected to one another, including: a DC-DC converting part; a current/voltage detecting part detecting a magnitude of a first current flowing through a switching transistor of the DC-DC current converting part to correspondingly output a first current detection voltage, detecting a magnitude of a both-end voltage of the LED array to correspondingly output a LED array detection voltage, and detecting a magnitude of a current flowing through the LED array to correspondingly output a second current detection voltage; and a constant current controlling part controlling an on/off duty of the switching transistor according to the magnitude of the first current detection voltage, the second current detection voltage and the LED array detection voltage detected by the current/voltage detecting part.
    Type: Application
    Filed: May 13, 2008
    Publication date: November 20, 2008
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Sang Yun LEE
  • Publication number: 20080287131
    Abstract: In the mobile communication system, asynchronous and synchronous Mobile Switching Centers (MSCs) are interconnected via an Interworking Interoperability Function (HF), and are connected to a Dual stack Home Location Register (D-HLR). The D-HLR stores and manages asynchronous subscription and synchronous subscription information of the mobile communication terminal. The HF stores and manages the synchronous mobile communication system information, receives the synchronous subscription information of the mobile communication terminal from the D-HLR, transmits synchronous system information and the synchronous subscription information of the mobile communication terminal to the synchronous MSC and receives a response from the synchronous MSC, and requests the asynchronous MSC to release a wireless connection when the mobile communication terminal and the synchronous mobile communication system are interconnected and notification of completion of the handover is provided.
    Type: Application
    Filed: April 19, 2005
    Publication date: November 20, 2008
    Applicant: SK TELECOM CO., LTD.
    Inventors: Jae Young Ju, Sang-Yun Lee, Hee-Hyeok Hahm, Soo Jin Kim, Bum-Soo Shin, Kyeong-Hee Han, Young-Ho Ju, Hyun Ki Hong, Young Ahn Ryu
  • Patent number: 7449112
    Abstract: A novel polyvinyl alcohol-based polymer membrane is disclosed. The novel polyvinyl alcohol-based polymer membrane of the present invention comprises two different compounds which are crosslinked by irradiating light such as UV or electronic beams or heat treatment to form a covalent bond between double bonds thereby providing improved properties such as chemical resistance and durability. This invention also relates to a process its preparation.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: November 11, 2008
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Soo-Bok Lee, Jeong Hoon Kim, In Jun Park, Dong-Kwon Kim, Jong-Wook Ha, Bong-Jun Chang, Kwang-Won Lee, Kwang-Han Kim, Sang-yun Lee, Sang-Man Ahn, Seung-Hak Choi
  • Patent number: 7447496
    Abstract: In a method for providing an arbitrary sound, chosen by a called subscriber, as a ringback tone to a calling subscriber through a call-originating exchanger, the call-originating exchanger requests a trunk connection to a sound database server based on first information on whether or not to replace an RBT (RingBack Tone) and second information on a route to the sound database server that are received from a home location register (HLR), and provides a called subscriber identification for the sound database server. Then, the sound database server searches its database for a sound specified by the called, and provides the found sound for the caller instead of a conventional RBT via the originating exchanger connected through the requested trunk connection. The caller can hear a sound specified by the called instead of the conventional RBT.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: November 4, 2008
    Assignee: SK Telecom Co., Ltd.
    Inventors: Hee Hyeok Hahm, Ki Mun Kim, Sang Yun Lee, Yeong Tae No
  • Publication number: 20080265360
    Abstract: A semiconductor layer structure includes a donor substrate and a detach region carried by the donor substrate. A device structure is carried by the donor substrate and positioned proximate to the detach region. The device structure includes a stack of crystalline semiconductor layers. The stack of crystalline semiconductor layers includes a pn junction.
    Type: Application
    Filed: June 30, 2008
    Publication date: October 30, 2008
    Inventor: Sang-Yun Lee
  • Publication number: 20080261380
    Abstract: A method of forming a semiconductor structure includes providing a substrate and providing a detach region which is carried by the substrate. A device structure which includes a stack of crystalline semiconductor layers is provided, wherein the detach region is positioned between the device structure and substrate. The stack is processed to form a vertically oriented semiconductor device.
    Type: Application
    Filed: June 30, 2008
    Publication date: October 23, 2008
    Inventor: Sang-Yun Lee
  • Patent number: 7433679
    Abstract: The present invention relates to apparatus and method of providing a history of failed calls for a subscriber who is targeted by the failed calls. In the present invention, when an exchanger can not route a call to a target subscriber it notifies an HLR (Home Location Register) of call routing failure. Then, the HLR sends information about the failed call, which includes the called and the calling number, and call originating time (or call receiving time), to a call control system. The call control system adds the received failed-call information to a calling history for the called number. Afterwards, when the called number is accessible the call control system provides a subscriber of the called number with the calling history, whereby the subscriber can know all of calling numbers that requested to make connections with him or her while he or she was not able to communicate with a mobile network.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: October 7, 2008
    Assignee: SK Telecom Co., Ltd.
    Inventors: Sang Yun Lee, Hee Hyeok Hahm, Tae Wook Park, Ki Mun Kim
  • Patent number: 7430750
    Abstract: An optical disc drive including a main frame in which a turntable is provided; a tray on which the optical disc is mounted and which is slidable in the main frame; a cover, which covers a top surface of the main frame and includes a clamper to fix the optical disc in the turntable; and a noise reducer, which is disposed in the cover and causes air generated by rotation of the optical disc circulate from an inner circumference to an outer circumference of the optical disc and from the outer circumference to the inner circumference thereof, thereby reducing noise.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: September 30, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-yun Lee, Myung-ryul Choi, Eun-hyoung Cho, Suk-il Oh
  • Patent number: 7423389
    Abstract: An LED driving device comprises a PWM IC including an RT/CT terminal operated by a power voltage and generating and outputting a sawtooth wave voltage of a predetermined frequency, a COMP terminal to which a comparison voltage compared with the sawtooth wave voltage is inputted, and an output terminal generating and outputting a pulse signal turned off in a section in which a level of the sawtooth wave voltage is higher than a level of the comparison voltage and turned on in a section in which the level of the sawtooth voltage is lower than the level of the comparison voltage. The LED driving device sets up the comparison voltage inputted to the COMP terminal of the PWM IC to be 0 when an error voltage corresponding to a difference between a both end voltage of an LED array and a predetermined reference voltage is less than a predetermined level.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: September 9, 2008
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Sang Yun Lee
  • Publication number: 20080191312
    Abstract: A semiconductor memory device includes a substrate and an interconnect region carried by the substrate. A donor layer is coupled to the interconnect region through a bonding interface. An electronic device is formed with the donor layer, wherein the electronic device is formed after the bonding interface is formed. A capacitor is connected to the electronic device so that the electronic device and capacitor operate as a dynamic random access memory device.
    Type: Application
    Filed: February 29, 2008
    Publication date: August 14, 2008
    Inventors: ChoonSik Oh, Sang-Yun Lee