Patents by Inventor Joonsuk Kim

Joonsuk Kim 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: 20190252634
    Abstract: Provided are an organic light-emitting display apparatus and a method of manufacturing the same. An organic light-emitting display apparatus includes: a substrate including an active area and a pad area, an anode electrode in the active area, an organic emission layer on the anode electrode, a cathode electrode on the organic emission layer, an auxiliary electrode connected to the cathode electrode, a signal pad in the pad area, and a first pad electrode connected to the signal pad, the first pad electrode covering a top of the signal pad, the first pad electrode being configured to prevent the top of the signal pad from being corroded, wherein the auxiliary electrode includes a first auxiliary electrode and a second auxiliary electrode connected to the first auxiliary electrode through a contact hole, and wherein the first pad electrode includes a same material as the first auxiliary electrode.
    Type: Application
    Filed: March 28, 2019
    Publication date: August 15, 2019
    Applicant: LG Display Co., Ltd.
    Inventors: SeJune KIM, Joonsuk Lee, SoJung Lee, Jin-Hee Jang, Jonghyeok Im, JaeSung Lee
  • Publication number: 20190238285
    Abstract: A wireless access point transmits a protocol data unit (PDU) that includes data and signaling for a plurality of user devices. The PDU spans a channel in frequency and an interval in time, and includes a first signaling section, a second signaling section and a traffic action. For each of a plurality of subchannels of the channel: the first signaling section includes (within the subchannel) a corresponding redundant copy of common signaling information for the user devices associated with the access point; the second signaling section includes (within the subchannel) a corresponding set of user-specific signaling information for a corresponding group of one or more of the user devices; and the traffic section includes (within the subchannel) a corresponding set of traffic data for the corresponding group of one or more user devices. Subchannels sizes may be configurable. A signaling set CRC may be included per subchannel.
    Type: Application
    Filed: April 9, 2019
    Publication date: August 1, 2019
    Inventors: Joonsuk Kim, Guoqing Li
  • Publication number: 20190239250
    Abstract: Some embodiments are directed to grouping electronic devices into contention groups to reduce uplink Orthogonal Frequency-Division Multiple Access (OFDMA) random access (OFDMA-RA) collisions. An access point may explicitly assign an electronic device to a contention group, or the electronic device may implicitly determine an assignment to the contention group. To explicitly assign a device to a contention group, the access point may randomly assign or assign based on a criteria of the electronic device. Examples of criteria include an association identifier (AID), a traffic type/quality of service (QoS) category, a power saving preference, and an association status. The electronic device may implicitly determine a contention group assignment based on the total number of contention groups. The electronic device may use the explicitly or implicitly assigned contention group number to determine whether the electronic device may contend for a given trigger frame random access (TF-R) frame.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Applicant: Apple Inc.
    Inventors: Guoqing LI, Joonsuk Kim, Christiaan A. Hartman, Syed Aon Mujtaba, Chiu Ngok E. Wong, Yong Liu, Su Khiong Yong
  • Patent number: 10356819
    Abstract: Disclosed herein are system, method, and computer program product embodiments for enabling a spatial reuse opportunity at a high efficiency (HE) station and a network allocation vector (NAV) reset capability at a legacy station using a Request to Send and/or Clear to Send (RTS and/or CTS) frame. For example, the method can include receiving a RTS frame with a redefined field that specifies spatial reuse information. The NAV can be set based on the RTS frame. The method can determine whether a second frame was received within a threshold time after a Short Interframe Space (SIFS). Finally, the method can reset the NAV based on whether the second frame was received within the threshold time.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: July 16, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Joonsuk Kim, Christiaan A. Hartman, Chiu Ngok E. Wong, Syed Aon Mujtaba, Matt Semersky, Su Khiong Yong
  • Patent number: 10341065
    Abstract: During operation, an interface circuit in an electronic device may receive, from a second electronic device (such as an access point in a WLAN), an uplink trigger frame that may specify an access category. In response to the uplink trigger frame, the electronic device may first include data associated with the specified access category in one or more frames, and then may transmit the one or more frames to the second electronic device. Moreover, when all the data associated with the specified access category has been transmitted or when there is no data associated with the specified access category, and when there is leftover time in an allocation associated with the uplink trigger frame, the interface circuit may transmit the one or more frames to the second electronic device with additional data associated with another access category that is different from the specified access category.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: July 2, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Christiaan A. Hartman, Ashok Ranganath, Oren Shani, Su Khiong Yong, Jarkko L. Kneckt, Joonsuk Kim
  • Publication number: 20190172893
    Abstract: An organic light emitting diode display is disclosed. The organic light emitting diode display includes a first substrate and a second substrate facing each other, and a conductive filler layer between the first and second substrates. The first substrate includes a bank layer having an opening exposing at least a portion of an anode, a spacer on the bank layer, an organic compound layer and a cathode disposed on the anode, the bank layer, and the spacer, an inorganic layer disposed on the cathode and including a first open hole exposing at least a portion of the cathode on the spacer, and an organic layer disposed on the inorganic layer and including a second open hole exposing at least a portion of the cathode on the spacer. The second substrate includes a power line electrically connected to a portion of the exposed cathode through the conductive filler layer.
    Type: Application
    Filed: December 6, 2018
    Publication date: June 6, 2019
    Applicant: LG Display Co., Ltd.
    Inventors: Joonsuk LEE, Sejune KIM
  • Patent number: 10313090
    Abstract: Disclosed herein are system, method, and computer program product embodiments for providing an efficient way to signal a tone mapping in a wireless communication protocol. Embodiments operate by receiving a frame for a wireless communications protocol. The embodiments extract a unique value from a tone mapping field in a preamble of the frame. The embodiments look up a resource block allocation for a portion of the tone space in a lookup table using the unique value. The embodiments map the tones of the portion of the tone space to one or more resource blocks based at least in part on the determined resource block allocation.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 4, 2019
    Assignee: Apple Inc.
    Inventors: Joonsuk Kim, Guoqing Li, Syed Aon Mujtaba
  • Patent number: 10313226
    Abstract: Disclosed herein are system, method, and computer program product embodiments for selectively decoding a multicast subframe in a multi-user frame for a wireless communications protocol. Embodiments include transmitting a request frame including a multicast group address for a multicast group to an access point (AP). The AP can determine a multicast identifier for the multicast group based on the multicast group address in the request frame. The AP can also transmit a response frame including the determined multicast identifier to a station (STA). The STA can receive a multi-user frame containing a multicast subframe from the AP. The STA can determine whether the multicast subframe is destined for the STA based on the determined multicast identifier and a multicast identifier stored in a preamble of the multi-user frame. The STA can determine whether to decode the multicast subframe based on the determination of whether the multicast subframe is destined for the STA.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: June 4, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Yong Liu, Joonsuk Kim, Christiaan A. Hartman, Su Khiong Yong, Syed A. Mujtaba, Matthew L. Semersky
  • Publication number: 20190165064
    Abstract: An organic light emitting diode display is discussed. The organic light emitting diode display can include a first substrate and a second substrate facing the first substrate. The first substrate includes an auxiliary electrode, a bank having an opening exposing at least a portion of the auxiliary electrode, a barrier disposed on the exposed auxiliary electrode, a spacer disposed on the bank and protruding toward the second substrate, a cathode included in an organic light emitting diode and divided by the barrier, one end of the cathode directly contacting the auxiliary electrode, a contact electrode disposed on the cathode and divided by the barrier, one end of the contact electrode directly contacting the auxiliary electrode, and a protective layer interposed between the cathode and the contact electrode. The contact electrode and a power line directly contact each other.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Jaesung Lee, Sejune Kim, Joonsuk Lee, Dohyung Kim
  • Patent number: 10305643
    Abstract: A wireless access point transmits a protocol data unit (PDU) that includes data and signaling for a plurality of user devices. The PDU spans a channel in frequency and an interval in time, and includes a first signaling section, a second signaling section and a traffic action. For each of a plurality of subchannels of the channel: the first signaling section includes (within the subchannel) a corresponding redundant copy of common signaling information for the user devices associated with the access point; the second signaling section includes (within the subchannel) a corresponding set of user-specific signaling information for a corresponding group of one or more of the user devices; and the traffic section includes (within the subchannel) a corresponding set of traffic data for the corresponding group of one or more user devices. Subchannels sizes may be configurable. A signaling set CRC may be included per subchannel.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: May 28, 2019
    Assignee: Apple Inc.
    Inventors: Joonsuk Kim, Guoqing Li
  • Patent number: 10306476
    Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: May 28, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Christiaan A. Hartman, Jarkko Kneckt, Yong Liu, Su Khiong Yong, Joonsuk Kim, Oren Shani
  • Publication number: 20190150092
    Abstract: This disclosure relates to low energy communication techniques. According to some embodiments, a wireless transmission may be received by a wireless device. The wireless transmission may include a physical layer (PHY) preamble and PHY data. The PHY preamble may include destination information indicating a destination and length information indicating a length (or duration) of the wireless transmission. The destination and length information may be included prior to a portion of the PHY preamble configured for channel estimation. The wireless device may determine whether the wireless transmission is destined to the wireless device based on the destination information. If the wireless transmission is not destined to the wireless device, the wireless device may drop a remainder of the wireless transmission.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 16, 2019
    Inventors: Syed Aon Mujtaba, Joonsuk Kim
  • Publication number: 20190140038
    Abstract: An organic light emitting diode display is disclosed. The organic light emitting diode display includes a first substrate on which a power electrode supplied with a power voltage and an organic light emitting diode are disposed, a second substrate on which a power line is disposed, the second substrate facing the first substrate, a conductive filler layer interposed between the first substrate and the second substrate, the conductive filler layer including a conductive medium electrically connecting a cathode of the organic light emitting diode to the power line, and a conductive sealant disposed at an edge of the first substrate and an edge of the second substrate, the conductive filler layer being accommodated inside the conductive sealant. The conductive sealant electrically connects the power electrode to the power line.
    Type: Application
    Filed: November 6, 2018
    Publication date: May 9, 2019
    Applicant: LG Display Co., Ltd.
    Inventors: Joonsuk LEE, Sejune KIM
  • Publication number: 20190140037
    Abstract: An organic light emitting diode display is disclosed. The organic light emitting diode display includes a first substrate, a second substrate, and a conductive filler layer between the first substrate and the second substrate. The first substrate includes an auxiliary electrode, a first barrier disposed on the auxiliary electrode, a cathode physically divided by the first barrier and exposing at least a portion of the auxiliary electrode, and a protective layer disposed on the cathode, physically divided by the first barrier, and exposing at least a portion of the auxiliary electrode. The second substrate includes a spacer protruding toward the first substrate and disposed adjacent to the auxiliary electrode and a power line covering at least a portion of the spacer and supplied with a power voltage.
    Type: Application
    Filed: November 5, 2018
    Publication date: May 9, 2019
    Applicant: LG Display Co., Ltd.
    Inventors: Joonsuk LEE, Sejune KIM
  • Publication number: 20190140039
    Abstract: An organic light emitting diode display is disclosed. The organic light emitting diode display includes a first substrate including an organic light emitting diode, a second substrate including a power line supplied with a power voltage and facing the first substrate, and a conductive filler layer between the first substrate and the second substrate. The first substrate includes an auxiliary electrode, a first barrier on the auxiliary electrode, a cathode physically divided by the first barrier and exposing at least a portion of the auxiliary electrode, a contact electrode disposed on the cathode, physically divided by the first barrier, and exposing at least a portion of the auxiliary electrode, and a protective layer between the cathode and the contact electrode. One end of the cathode directly contacts the auxiliary electrode, and one end of the contact electrode directly contacts the auxiliary electrode.
    Type: Application
    Filed: November 6, 2018
    Publication date: May 9, 2019
    Applicant: LG Display Co., Ltd.
    Inventors: Joonsuk LEE, Sejune KIM, Jaesung LEE
  • Patent number: 10285200
    Abstract: An access point selects a channel access policy for an electronic device in a wireless local area network (WLAN). During operation, an interface circuit of the access point receives a channel access preference from the electronic device. The channel access preference includes: a multi-user trigger-based channel access technique, a single-user contention-based channel access technique, or both. The interface circuit selects the channel access policy for the electronic device based, at least in part, on the received channel access preference. The channel access policy can also be selected based at least in part on a communication performance metric associated with communication in the WLAN. The interface circuit communicates the selected channel access policy to the electronic device, which subsequently accesses a communication channel and communicates packets with the access point in accordance with the channel access policy.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: May 7, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Christiaan A. Hartman, Ashok Ranganath, Joonsuk Kim, Matthew L. Semersky, Oren Shani, Su Khiong Yong, Yong Liu
  • Patent number: 10277424
    Abstract: Time, frequency and waveform division multiplex schemes are used to efficiently estimate multiple uplink channels in a Wireless Local Area Network (WLAN). Orthogonal Frequency Division Multiple Access (OFDMA) and multi-user Multiple Input Multiple Output (MU-MIMO) approaches provide efficient uplink data transmission. An Access Point (AP) communicates with multiple Stations (STAs) in the WLAN. In some approaches, two or more STAs are addressed and the two or more STAs respond at the same time. The AP receives a composite signal and separates the responses to estimate the uplink channel from each STA. After the AP learns the uplink channels, the AP triggers data transmission from one or more of the WLAN STAs by sending a synchronizing trigger message. In some embodiments, the STAs respond simultaneously with data transmissions to the AP.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: April 30, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Joonsuk Kim, Yong Liu, Christiaan A. Hartman, Su Khiong Yong
  • Publication number: 20190124593
    Abstract: A station (STA) of a wireless local area network (WLAN) transitions implicitly between power management (PM) modes or PM states, without providing an explicit indication of the PM mode/state change to an access point (AP) of the WLAN. Transitions include changes between an active mode and a power save (PS) mode, or between an awake state and a doze state of the PS mode. Transitions occur immediately after receipt of a beacon indicating pending data for the STA, after an offset time indicated in the beacon, or at a specific wake time negotiated with the AP. After data reception is complete, the STA transitions implicitly to the PS mode or a doze state of the PS mode, after a power save inactivity timeout period or after receiving an indication that data transmission is complete.
    Type: Application
    Filed: September 19, 2018
    Publication date: April 25, 2019
    Inventors: Chiu Ngok E. WONG, Syed A. MUJTABA, Christiaan A. HARTMAN, Joonsuk KIM
  • Patent number: 10264602
    Abstract: Embodiments include a method, computer program product, and system for grouping electronic devices into contention groups to reduce uplink Orthogonal Frequency-Division Multiple Access (OFDMA) random access (OFDMA-RA) collisions. An access point may explicitly assign an electronic device to a contention group, or the electronic device may implicitly determine an assignment to the contention group. To explicitly assign a device to a contention group, the access point may randomly assign or assign based on a criteria of the electronic device. Examples of criteria include an association identifier (AID), a traffic type/quality of service (QoS) category, a power saving preference, and an association status. The electronic device may implicitly determine a contention group assignment based on the total number of contention groups.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: April 16, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Joonsuk Kim, Christiaan A. Hartman, Syed Aon Mujtaba, Chiu Ngok E. Wong, Yong Liu, Su Khiong Yong
  • Patent number: 10237870
    Abstract: Managing orthogonal frequency division multiple access (OFDMA) uplink acknowledgements is described herein. An example system can include an interface circuit to generate a physical layer convergence protocol data unit (PPDU) including a physical layer preamble, a first sub-channel field corresponding to a first station, and a second sub-channel field corresponding to a second station. The first sub-channel field can carry a first unicast trigger corresponding to the first station, and the second sub-channel field can carry a second unicast trigger corresponding to the second station. The interface circuit can also transmit the PPDU to the first and second stations.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: March 19, 2019
    Assignee: Apple Inc.
    Inventors: Guoqing Li, Joonsuk Kim, Christiaan A. Hartman, Yong Liu, Chiu Ngok E. Wong, Syed Aon Mujtaba, Su Khiong Yong