Patents by Inventor Chang Ho Lee

Chang Ho 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).

  • DEVICE AND METHOD FOR EDITING TEXT IN PORTABLE TERMINAL
    Publication number: 20140229165
    Abstract: A device and a method for editing text in a portable terminal are provided. The device includes displaying content comprising at least one unit of text, receiving an input of at least one unit of text through a first display area, changing to an editing mode for editing the content when the input text is released from the first display area while dragging the input text to replace a specific word included in the content located at a second display area, and replacing the specific word with the input text when the input text is completely dragged to the specific word.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 14, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Chang-Ho LEE
  • ORGANIC ELECTROLUMINESCENT DEVICE AND MANUFACTURING METHOD THEREOF
    Publication number: 20140209870
    Abstract: An organic electroluminescent device includes a plurality of main pixels. Each of the main pixels includes red, green, and blue sub-pixels. Each of the sub-pixels includes a first electrode, a second electrode opposite to the first electrode, and an organic light emitting layer between the first and second electrode. The organic light emitting layer of each of the sub-pixels includes a blue light emitting layer and a green light emitting layer. Optical microresonator distances of the red, green, and blue sub-pixels are different from each other.
    Type: Application
    Filed: June 20, 2013
    Publication date: July 31, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jihye SHIM, Jihwan YOON, Chang-ho LEE, Jinyoung YUN
  • PIXEL CIRCUIT OF AN ORGANIC LIGHT EMITTING DISPLAY DEVICE AND ORGANIC LIGHT EMITTING DISPLAY DEVICE INCLUDING THE SAME
    Publication number: 20140198136
    Abstract: A pixel circuit according to an embodiment includes: a capacitor; a first switching unit configured to initialize the capacitor in response to a first scan signal received from a first scan line; a second switching unit configured to receive a second scan signal from a second scan line disposed in a first direction from the first scan line, to receive a third scan signal from a third scan line disposed in a second direction opposite to the first direction from the first scan line, and to be turned on in response to one of the second scan signal and the third scan signal that is activated after the first scan signal is activated to store a data signal in the capacitor; and a driving transistor configured to provide a driving current to an OLED in response to the data signal stored in the capacitor.
    Type: Application
    Filed: August 9, 2013
    Publication date: July 17, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventor: Chang-Ho Lee
  • METHOD FOR FABRICATING ORGANIC LIGHT EMITTING DEVICE
    Publication number: 20140193936
    Abstract: A method of fabricating an organic light emitting device includes forming a first electrode layer on a substrate, surface-treating the first electrode layer with CF4 plasma, forming a first common layer containing pentacene on the surface-treated first electrode layer, forming an organic light emitting layer on the first common layer, forming a second common layer on the organic light emitting layer, and forming a second electrode layer on the second common layer. The CF4 plasma treatment enhances the luminous efficiency of the organic light emitting device.
    Type: Application
    Filed: July 31, 2013
    Publication date: July 10, 2014
    Inventors: Hyun Ju CHOI, CHANG HO LEE, ILSOO OH, HeeJoo KO, DAE YUP SHIN, KeonHa CHOI, CHANGMIN LEE, INJAE LEE, Pyungeun JEON, SEJIN CHO, JinYoung YUN, Bora LEE, BEOMJOON KIM, Yeon woo LEE, Ji Hye SHIM, Joongwon SIM
  • Method of driving display panel and display apparatus for performing the same
    Patent number: 8773339
    Abstract: A method of driving a display panel includes applying a common voltage to the display panel, sensing a frequency of the display panel to generate a frequency signal, adjusting a gain of an operational amplifier based on the frequency signal, receiving a feedback common voltage from the display panel, and compensating the common voltage using an input resistor, the operational amplifier and a feedback resistor based on the feedback common voltage to apply the compensated common voltage to the display panel. The operational amplifier includes an inverting input terminal connected to the input resistor, a non-inverting input terminal to which a reference common voltage is applied and an output terminal. The feedback resistor is between the inverting input terminal and the output terminal.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: July 8, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young-Su Kim, Jae-Hoon Lee, Chang-Ho Lee, Yu-Han Bae
  • PYRENE-BASED COMPOUND AND ORGANIC LIGHT-EMITTING DIODE INCLUDING THE SAME
    Publication number: 20140167007
    Abstract: A pyrene-based compound and an organic light-emitting diode including the pyrene-based compound are provided.
    Type: Application
    Filed: October 8, 2013
    Publication date: June 19, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hye-Jin Jung, Seok-Hwan Hwang, Young-Kook Kim, Jin-O Lim, Sang-Hyun Han, Eun-Jae Jeong, Soo-Yon Kim, Jun-Ha Park, Eun-Young Lee, Chang-Ho Lee, Jong-Hyuk Lee
  • Display device
    Patent number: 8736546
    Abstract: A display device includes a display panel configured to display an image in an upward direction and a reflective panel on the display panel, the reflective panel configured to selectively transmit or reflect light with respect to an area corresponding to the image.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: May 27, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Il-Soo Oh, Chang-Ho Lee, Hee-Joo Ko, Hyung-Jun Song, Se-Jin Cho, Jin-Young Yun, Bo-Ra Lee, Young-Woo Song, Jong-Hyuk Lee, Sung-Chul Kim
  • ADJUSTABLE GAIN FOR MULTI-STACKED AMPLIFIERS
    Publication number: 20140139288
    Abstract: Techniques for providing adjustable gain in an amplifier. In an aspect, a composite amplifier having adjustable gain includes a plurality of amplifiers coupled in parallel, wherein each of the amplifiers may be turned on or off to adjust the overall gain of the composite amplifier. Each amplifier may include an input transistor and at least two cascode transistors. To turn each amplifier off, the gate voltage of a second or lowermost cascode transistor coupled to the input transistor may be grounded, and the gate voltage of a first cascode transistor coupled to the output voltage may be coupled to a first turn-off voltage to reduce the drain-to-gate voltage drop across the first cascode transistor.
    Type: Application
    Filed: November 16, 2012
    Publication date: May 22, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jeongwon Cha, Chang-Ho Lee, Aristotele Hadjichristos
  • ORGANIC LIGHT-EMITTING DIODE DISPLAY APPARATUS AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20140138646
    Abstract: An organic light-emitting diode (OLED) display apparatus including a substrate, an insulation layer on the substrate, and an align mark formed of an insulation material, wherein an upper surface of the insulation layer contacts a lower surface of the align mark.
    Type: Application
    Filed: September 9, 2013
    Publication date: May 22, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Chang-Ho Lee, Jong-Hyun Park, Seong-Kweon Heo, Chun-Gi You
  • Driving circuit for display apparatus
    Patent number: 8730144
    Abstract: A driving circuit includes a plurality of stages driven in response to a start signal. Each normal stage outputs a gate signal and a carry signal, increases an electric potential of a node in response to a previous carry signal of a previous stage, and decreases the gate signal to a first voltage in response to a carry signal from a next stage. Each stage applies a second voltage lower than the first voltage to the node in response to receipt of a carry signal from a second next stage. A first dummy stage outputs a first dummy carry signal to the last two normal stages in response to a last carry signal from the last normal stage and the start signal, and a second dummy stage outputs a second dummy carry signal to the last normal stage in response to the first dummy carry signal and the start signal.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: May 20, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang Ho Lee, Jaehoon Lee
  • ELECTRONIC DEVICE AND METHOD FOR CHANGING SETTING VALUE
    Publication number: 20140132531
    Abstract: A method and an apparatus for operating an electronic device for changing a setting value are provided. In the method, a touch input for a set region is detected, so that a mode is switched to a setting change mode for changing a stored setting value. At least one guide interface for receiving a change of at least one setting value among stored setting values is displayed. A predetermined gesture for an arbitrary region of the displayed at least one guide interface is detected, so that whether to store a changed at least one setting value is determined.
    Type: Application
    Filed: August 23, 2013
    Publication date: May 15, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Chang-Ho LEE
  • Organic light emitting device with a low-resistance cathode
    Patent number: 8716928
    Abstract: Provided is an organic light emitting device including an anode, a cathode, and a light emitting layer disposed between the anode and the cathode, wherein the cathode has a structure including a first metal layer and a second metal layer, or a structure including a first metal layer, a second metal layer, and one selected from the group consisting of an oxide layer, a nitride layer, and a nitric oxide layer, and wherein the cathode has low resistance.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: May 6, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Tak Kim, Won-Jong Kim, Joon-Gu Lee, Jin-Baek Choi, Chang-Ho Lee, Il-Soo Oh, Hee-Ju Ko, Se-Jin Cho, Jin-Young Yun, Hyung-Jun Song, Kyu-Hwan Hwang, Jong-Hyuk Lee
  • Organic light emitting diode display and method for manufacturing the same
    Patent number: 8686420
    Abstract: An organic light emitting diode (OLED) display includes a substrate including a plurality of pixels defined thereon, a thin film transistor (TFT) positioned at each pixel, a negative electrode electrically connected to the TFT, an organic emission layer positioned on the negative electrode, and a positive electrode positioned on the organic emission layer, the positive electrode including an auxiliary layer positioned on the organic emission layer, a conductive layer positioned on the auxiliary layer, and an insulation layer positioned on the conductive layer.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: April 1, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Il-Soo Oh, Chang-Ho Lee, Hee-Joo Ko, Se-Jin Cho, Hyung-Jun Song, Jin-Young Yun, Jong-Hyuk Lee
  • Portable computer
    Patent number: D706761
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: June 10, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Ho Lee, Zi-On Kwon, Jochen Backs, Won-Suk Chung, Han-Kyung Ji
  • Portable computer
    Patent number: D706762
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: June 10, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Ho Lee, Zi-On Kwon, Jochen Backs, Won-Suk Chung, Han-Kyung Ji
  • Portable computer
    Patent number: D706766
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: June 10, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Ho Lee, Zi-On Kwon, Jochen Backs, Won-Suk Chung, Han-Kyung Ji
  • Portable computer
    Patent number: D707222
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: June 17, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Ho Lee, Zi-On Kwon, Jochen Backs, Won-Suk Chung, Han-Kyung Ji
  • Notebook computer
    Patent number: D709490
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: July 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Ho Lee, Zi-On Kwon
  • Joypad for mobile communication terminal
    Patent number: D709881
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: July 29, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Suk Chung, Chang-Ho Lee
  • Notebook computer
    Patent number: D712897
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: September 9, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Ho Lee, Zi-On Kwon