Patents by Inventor Dong Choi

Dong 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: 20150188073
    Abstract: An organic electroluminescent device and organic electroluminescent display device having enhanced efficiency are discussed. In one example, the organic electroluminescent device includes first and second electrodes facing each other on a substrate and at least two emission layers formed between the first and second electrodes and realizing blue light, wherein, among the emission layers, a first blue emission layer close to the first electrode includes a first blue dopant having a different maximum luminescence wavelength than that of a second blue dopant of a second blue emission layer close to the second electrode.
    Type: Application
    Filed: December 2, 2014
    Publication date: July 2, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: So-Yeon AHN, Chang-Wook HAN, Hong-Seok CHOI, Seung-Ryong JOUNG, Gwi-Jeong CHO, Hee-Dong CHOI
  • Publication number: 20150188066
    Abstract: Discussed is a white organic light emitting device including an anode and a cathode opposite to each other, a plurality of stacks disposed between the anode and the cathode, each of the stacks including a hole transport layer, a light emitting layer and an electron transport layer, and a charge generation layer disposed between different stacks, the charge generation layer including a single organic host having an electron transport property, and an n-type dopant and a p-type dopant.
    Type: Application
    Filed: December 8, 2014
    Publication date: July 2, 2015
    Applicant: LG Display Co., Ltd.
    Inventors: Ki-Woog SONG, Tae-Il KUM, Shin-Han KIM, Seon-Keun YOO, Hee-Dong CHOI, Chi-Yul SONG
  • Publication number: 20150155513
    Abstract: An organic light emitting device containing a multilayer stack structure including n stacks between an anode and a cathode is described, wherein the respective stacks comprise a hole transport layer, a light emitting layer and an electron transport layer, an n-type charge generation layer and a p-type charge generation layer respectively provided between the different adjacent stacks, wherein the p-type charge generation layer comprises an indenofluorenedione derivative represented by Formula 1 or an imine derivative represented by Formula 2 or 3.
    Type: Application
    Filed: December 2, 2014
    Publication date: June 4, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Sung-Hoon Pieh, Chang-Wook Han, Seok-Joon Oh, Ki-Woog Song, Tae-Shick Kim, Hee-Dong Choi, Seung-Hyun Kim, Seong-Su Jeon, Chi-Yul Song
  • Patent number: 9048447
    Abstract: An organic light emitting display device with improved lifespan is disclosed. The organic light emitting display device includes first and second electrodes facing each other on a substrate, at least two light emitting units formed between the first and second electrodes, an N-type charge generation layer and a P-type charge generation layer sequentially stacked between the light emitting units, and at least one auxiliary charge generation layer formed between at least any one of the P-type charge generation layer and the N-type charge generation layer and an emitting layer of the light emitting unit disposed on an upper or lower portion of the at least any one thereof and generating electrons and holes supplied to the emitting layer of the light emitting unit.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: June 2, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Gwi-Jeong Cho, Jae-Man Lee, Jeong-Haeng Heo, So-Yeon Ahn, Tae-Shick Kim, Hee-Dong Choi
  • Publication number: 20150146190
    Abstract: Provided herein a laser radar apparatus including a plurality of light transmission and reception modules arranged concavely in an opposite direction to a scanning direction based on a surface vertical to the scanning direction, wherein each of the plurality of light transmission and reception modules comprises a transmitter configured to deflect a laser beam and to irradiate the deflected laser beam to a target; and a receiver configured to receive the laser beam reflected from the target.
    Type: Application
    Filed: October 17, 2014
    Publication date: May 28, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae Sik SIM, Ki Soo KIM, Bong Ki MHEEN, Myoung Sook OH, Hong Seok SEO, Jung Ho SONG, Yong Hwan KWON, Dong Sun KIM, Min Hyup SONG, Gyu Dong CHOI
  • Patent number: 9035546
    Abstract: The organic light emitting display device includes an organic light emitting display panel and a data driver, wherein the organic light emitting display panel includes an active region which includes pixel driving TFTs for embodying an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light, a GIP region which includes a gate driver formed with a plurality of gate driving TFTs for respectively driving gate lines of the active region, a GND region formed between the GIP region and the active region to be formed with a base voltage line for supplying base voltage to the organic luminescent elements of the active region, and a sealant region formed with a sealant for attaching an upper substrate to a lower substrate, and wherein the GND region includes out-gassing blocking holes.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: May 19, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Hee-Dong Choi, Sam-Min Ko
  • Publication number: 20150126112
    Abstract: Provided are a complex device including a piezoelectric device, a wire patch cell (WPC) antenna disposed on one surface of the piezoelectric device, the WPC antenna being connected to two antenna patterns that are vertically spaced apart from each other, and a near field communication (NFC) antenna disposed outside the WPC antenna and an electronic device having the same.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 7, 2015
    Inventors: In Kil PARK, Tae Hyung NOH, Sung Cheol PARK, Young Sul KIM, Soon Dong CHOI, In Seob JUNG, Wan PARK, Hee Seob SHIN
  • Publication number: 20150122575
    Abstract: Provided are a sound amplification box and a sound amplification device. The sound amplification box includes a body including a predetermined resonance space therein and having a surface contacting an electronic device, a resonance hole formed in at least one surface of the body, and a vibration transmission part in a predetermined region of the surface contacting the electronic device.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 7, 2015
    Inventors: In Kil PARK, Tae Hyung NOH, Sung Cheol PARK, Young Sul KIM, Soon Dong CHOI, In Seob JUNG, Wan PARK
  • Publication number: 20150123107
    Abstract: Provided are an organic light emitting display device and a method of manufacturing the same. The organic light emitting display device includes: an emission unit including an organic light emitting diode, a pixel circuit unit including: a circuit configured to drive the emission unit, and a line configured to apply a signal to the circuit, and a light blocking layer covering the pixel circuit unit, and configured to block light input to the pixel circuit unit, and a repair part disposed in the light blocking layer, the repair part being configured for repairing the line when a defect occurs in a pixel that includes the pixel circuit unit.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 7, 2015
    Applicant: LG Display Co., Ltd.
    Inventors: Hee Dong Choi, Sung Jin Hong, Soon Il Yun, Il Gi Jeong, Joong Sun Yoon, Kyungsu Lee, Seung-Yong Yang
  • Patent number: 9025808
    Abstract: The present invention relates to a high-output microspeaker, and more particularly, to a high-output microspeaker which includes a damper for preventing lateral vibrations of a diaphragm.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: May 5, 2015
    Assignee: Em-Tech. Co., Ltd.
    Inventors: Joong Hak Kwon, Cheon Myeong Kim, Ji Hoon Kim, Kyu Dong Choi
  • Publication number: 20150114447
    Abstract: A junction box connected to a photoelectric converter and including a body with a diode. The body includes first parts that are parallel to each other, a second part connecting ends of the first parts, and a bridge connecting the first parts. The diode is in the bridge, and the second part is spaced from the bridge to form an opening.
    Type: Application
    Filed: September 4, 2014
    Publication date: April 30, 2015
    Inventors: Yoon-Mook KANG, Jae-Hoon LEE, Jong-Chul LEE, Sun-Dong CHOI, Chan-Yoon JUNG, Bum-Rae KIM, Yong-Mo CHOI, Seung-Hee LEE, Jong-San IM, Jeong-Ho SON
  • Publication number: 20150020882
    Abstract: A sealing member according to an exemplary embodiment of the present invention includes a first plate having a predetermined width with a plate shape, and a second plate with a plate shape connected to both ends of the first plate, wherein the first plate and the second plate have the same plate shape and form a closed line.
    Type: Application
    Filed: November 13, 2013
    Publication date: January 22, 2015
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Jong-Chul Lee, Chan-Yoon Jung, Yoon-Mook Kang, Yong-Mo Choi, Seung-Hee Lee, Jae-Hoon Lee, Do-Hyun Baek, Jong-San Im, Jeong-Ho Son, Sun-Dong Choi, Soon-Pil Hyeon, Bum-Rae Kim
  • Publication number: 20140354924
    Abstract: Disclosed is a liquid crystal display device that includes: first and second substrates; a gate line and a data line on the first substrate, the gate line and the data line crossing each other to define a pixel region; a thin film transistor connected to the gate line and the data line; a color filter layer on the thin film transistor, the color filter layer including red, green and blue color filters each corresponding to the pixel region; a protrusion pattern at a boundary of the pixel region, the protrusion pattern including at least two of the red, green and blue color filters; a pixel electrode on the color filter layer; a first alignment layer on the pixel electrode; a first patterned spacer on the second substrate, the first patterned spacer contacting the first alignment layer over the protrusion pattern; and a liquid crystal layer between the first and second substrates.
    Type: Application
    Filed: May 27, 2014
    Publication date: December 4, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Woo-Jung BYUN, Tae-Young KIM, Hyo-Jong YI, Dong-In CHOI
  • Patent number: 8895988
    Abstract: An electrostatic discharge device and an organic electro-luminescence display device having the same are provided. The organic electro-luminescence display device includes an electrostatic discharge device including a metal pattern having an island shape on a substrate, an insulating layer on the metal pattern, a semiconductor pattern on the insulating layer, the semiconductor pattern corresponding to the metal pattern, a first electrode overlapping one end of the semiconductor pattern, and a second electrode overlapping the other end of the semiconductor pattern, and spaced from the first electrode, thereby preventing a current leakage, a signal distortion and a signal cross-talk to improve the reliability.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: November 25, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Hee Dong Choi
  • Publication number: 20140339958
    Abstract: Provided is a piezoelectric vibrating device including a case provided with a certain space therein, a piezoelectric vibrating member provided in the case and vibrating according to an applied voltage, a weight member provided in the case and connected to a part of the piezoelectric vibrating member in a vibration direction of the piezoelectric vibrating member, and a limitation member for limiting movement of the weight member.
    Type: Application
    Filed: May 19, 2014
    Publication date: November 20, 2014
    Applicant: INNOCHIPS TECHNOLOGY CO., LTD.
    Inventors: In Kil PARK, Tae Hyung NOH, Seong Cheol PARK, Young Sul KIM, Byung Yul CHOI, Hyun Chul JUNG, Soon Dong CHOI
  • Patent number: 8883579
    Abstract: A method of fabricating an array substrate for an organic electroluminescent display device includes forming a semiconductor layer, a semiconductor dummy pattern, a first storage electrode and a first gate insulating layer on a substrate; forming a second gate insulating layer on the semiconductor layer and the first storage electrode; forming a gate electrode and a second storage electrode on the second gate insulating layer; forming ohmic contact layers by doping impurities into both sides of the semiconductor layer; forming an inter insulating layer on the gate electrode and the second storage electrode; forming source and drain electrodes and a third storage electrode on the inter insulating layer; forming a passivation layer on the source and drain electrodes and the third storage electrode; forming a first electrode and a fourth storage electrode on the passivation layer; and forming a spacer and a bank on the first electrode.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: November 11, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Hee-Dong Choi, Jin-Chae Jeon, Seung-Joon Jeon, Hoe-Yong Kim
  • Publication number: 20140319526
    Abstract: A thin film transistor array substrate including a gate line and a data line formed on a substrate, the gate and data lines crossing each other; a gate insulation film formed between the gate and data lines; a gate electrode formed at an intersection of the gate and data lines; an active layer formed on the gate insulation film to overlap the gate electrode; an etch stop layer formed on the active layer to define a channel region of the active layer; and a source electrode and a drain electrode formed on the active layer to partially overlap the active layer. The etch stop layer is between the source and drain electrodes, and the source and drain electrodes are spaced apart from the etch stop layer.
    Type: Application
    Filed: November 13, 2013
    Publication date: October 30, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventor: Hee Dong CHOI
  • Patent number: 8852978
    Abstract: A thin film transistor fabrication method allows forming a first photoresist pattern on a triple layer of insulation, conductive and metal films opposite to a semiconductor pattern. A first metal pattern and a conductive pattern are formed through an etch process before forming source and drain regions through a first ion injection process. A second photoresist pattern with a narrower width than that of the first photoresist pattern is derived from the first photoresist pattern. The first metal pattern is reformed into a second metal pattern with a narrower width than that of the second photoresist pattern. A process is performed that includes removing the second photoresist pattern, forming LDD (Lightly Doped Drain) regions in the semiconductor pattern, and forming GOLDD (Gate Overlap LDD) regions in the semiconductor pattern. A second insulation film is formed before forming source and drain electrodes on the second insulation film.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: October 7, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Hee Dong Choi
  • Publication number: 20140241566
    Abstract: An inner magnet type microspeaker including a suspension is provided which can maximize the size of a magnet. The inner magnet type microspeaker includes: a frame; a yoke installed inside of the frame and including a bottom surface and sidewalls bent upward from the bottom surface; a magnet bonded to an inside of the yoke; a voice coil located in a gap portion between the sidewalls of the yoke and the magnet; a diaphragm that vibrates by the voice coil; and a suspension where the voice coil is attached, and which guides vibrations of the diaphragm and the voice coil and includes a ring-shaped inner peripheral portion and an outer peripheral portion that surrounds the inner peripheral portion, spaced a predetermined distance apart from the inner peripheral portion, with one end and the other end being connected to the inner peripheral portion.
    Type: Application
    Filed: February 20, 2014
    Publication date: August 28, 2014
    Applicant: EM-TECH Co., Ltd.
    Inventors: Kyu Dong Choi, Jong Soo Yoon
  • Patent number: 8792760
    Abstract: An optical electrical hybrid cable for transmitting an optical signal and an electrical signal simultaneously is provided. The optical electrical hybrid cable includes a fiber-optic cable disposed in the center of the optical electrical hybrid cable, and including a plurality of tubes each of which comprises a plurality of optical fibers operatively mounted in an inner space thereof, and a first binder disposed around the plurality of tubes, a plurality of power cables disposed around the fiber-optic cable, each of the power cables comprising a plurality of conducting wires, and a second binder disposed around the plurality of power cables.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: July 29, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-Dong Choi, Ho-Soon Lee