Patents by Inventor Beohm-Rock Choi

Beohm-Rock 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).

  • Patent number: 7646044
    Abstract: A thin film transistor is provided, which includes: a semiconductor layer including an intrinsic portion; a gate electrode overlapping the intrinsic portion; a gate insulating layer disposed between the semiconductor layer and the gate electrode; and source and drain electrodes that have edges opposing each other with respect to the intrinsic portion of the semiconductor layer and are connected to the semiconductor layer, wherein the intrinsic portion has a curved surface contacting the gate insulating layer.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: January 12, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Moo Huh, Joon-Hak Oh, Joon-Hoo Choi, In-Su Joo, Beohm-Rock Choi
  • Patent number: 7642712
    Abstract: A display device including a substrate, a first electrode formed over the substrate, and a partition member having a first aperture is provided. The display device further includes an emitting control layer covering a portion of the first aperture, thereby providing a second aperture to expose a portion of the first electrode, wherein the second aperture has a quadrangular shape with chamfered corners which help disperse organic material uniformly. Advantageously, the emitting control layer is formed of a material having an affinity to an organic material forming an organic light emitting layer within the second aperture, thereby helping to disperse the organic material uniformly and improve brightness uniformity.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: January 5, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-Won Lee, Jianpu Wang, Jung-Soo Rhee, Jin-Koo Chung, Song-Mi Hong, Beohm-Rock Choi
  • Publication number: 20090322215
    Abstract: The present invention relates to an organic light emitting device, and the organic light emitting device according to an exemplary embodiment of the present invention includes a blue subpixel that is larger than a red subpixel and a green subpixel. The red subpixel and the green subpixel have the same layered structure such that the red subpixel and the green subpixel are formed by using the same shadow mask.
    Type: Application
    Filed: April 1, 2009
    Publication date: December 31, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Un-Cheol SUNG, Beohm-Rock Choi
  • Patent number: 7633088
    Abstract: A display device including a plurality of pixels is disclosed. Each of the pixels includes a switching transistor, a plurality of scanning lines connected to the switching transistors and a plurality of data lines connected to the switching transistors. The scanning lines transmit a gate turn-on voltage that turns on the switching transistors and a gate turn-off voltage that turns off the switching transistors and the data lines transmit a data voltage. The gate turn-on voltage is determined based on a maximum value of the data voltage. The gate turn-on voltage based on the maximum value of the data voltage results in high luminance and less crosstalk phenomenon.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: December 15, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Parikh Kunjal, Byung-Sik Koh, Beohm-Rock Choi, Joon-Hoo Choi, Joon-Chul Goh
  • Publication number: 20090261713
    Abstract: An organic light emitting device according to an exemplary embodiment of the present invention includes: a substrate; a first signal line and a second signal line formed on the substrate and intersecting each other; a common voltage line formed on the substrate, and intersecting one of the first signal line and the second signal line; a switching thin film transistor connected to the first signal line and the second signal line; a driving thin film transistor connected to the switching thin film transistor; an insulating layer covering the first signal line, the second signal line, the switching thin film transistor, and the driving thin film transistor; a pixel electrode formed on the insulating layer, and electrically connected to the driving thin film transistor; an organic light emitting member formed on the pixel electrode and including an emission layer and a member layer; and a common electrode formed on the organic light emitting member, wherein the member layer is made of a plurality of layers includ
    Type: Application
    Filed: October 29, 2008
    Publication date: October 22, 2009
    Inventors: Beohm-Rock CHOI, Sang-Woo Lee, Un-Cheol Sung, Jung-Soo Rhee, Young-Rok Song, Jung-Yeon Kim
  • Publication number: 20090261716
    Abstract: The present invention relates to an organic light emitting device including a first pixel, a second pixel, and a third pixel each displaying a color. Each pixel includes a reflecting member; a transflective member forming a micro-cavity along with the reflecting member; an organic light emitting member disposed between the reflecting member and the transflective member; a transparent electrode disposed between the reflecting member and the transflective member; and a compensation layer disposed between the reflecting member and the transflective member to form a predetermined distance between the reflecting member and the transflective member, wherein the distance between the reflecting member and the transflective member are substantially the same in the first pixel, the second pixel and the third pixel.
    Type: Application
    Filed: January 27, 2009
    Publication date: October 22, 2009
    Inventors: Beohm-Rock CHOI, Un-Cheol Sung, Jung-Soo Rhee, Sang-Woo Lee, Soo-Yeon Lee
  • Publication number: 20090121983
    Abstract: An organic light emitting device according to an exemplary embodiment of the present invention includes a plurality of first, second, and third pixels for displaying different colors, wherein the plurality of first and second pixels are alternately arranged in a first column, the plurality of third pixels are continuously arranged in a second column, and an interval between the third pixels is larger than an interval between the first pixel and the second pixel.
    Type: Application
    Filed: October 13, 2008
    Publication date: May 14, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Un-Cheol SUNG, Beohm-Rock CHOI, Jung-Soo RHEE, Young-Rok SONG, Ji-Hye CHOI
  • Publication number: 20090101917
    Abstract: A TFT substrate with reduced pixel defect rate is presented. The TFT substrate includes a pixel electrode, a negative line to apply a reverse voltage to the pixel electrode, and a recovery transistor including a drain electrode overlapping a part of the negative line with a insulating layer disposed between the negative line and the drain electrode. A contact hole is formed on the negative line and the drain electrode, and a bridge electrode connects the negative line and the drain electrode through the contact hole. The thin film transistor substrate and a display apparatus presented herein protect a data line assembly metal layer and decrease pixel defect. An improved reverse voltage efficiency is applied to a pixel electrode to protect a drain electrode.
    Type: Application
    Filed: November 21, 2008
    Publication date: April 23, 2009
    Inventors: Song-mi HONG, Jung-soo Rhee, Beohm-rock Choi, Jin-koo Chung, Jianpu Wang, Dong-won Lee
  • Patent number: 7514719
    Abstract: The invention provides a display device including an insulating substrate, a photosensor formed on the insulating substrate and including a semiconductor layer, an input terminal and an output terminal electrically connected to the semiconductor layer, a first insulating layer formed on the photosensor, a pixel electrode, an organic layer, and a common electrode layer sequentially formed on the first insulating layer, and a controller that controls an input to the pixel electrode based on an output of the photosensor.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: April 7, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-Chul Jung, Beohm-Rock Choi, Joon-Chul Goh
  • Publication number: 20090072730
    Abstract: A display device comprises a first electrode formed on a substrate, a plurality of second electrodes formed on the substrate below the first electrode, an organic luminescent layer formed between the first electrode and the plurality of second electrodes, and a color filter layer formed on the substrate, wherein the color filter layer includes a red filter, a green filter, a blue filter and a white filter.
    Type: Application
    Filed: September 23, 2008
    Publication date: March 19, 2009
    Inventors: Beohm-Rock Choi, Joon-Hoo Choi, Jae-Hoon Chung, Jin-Koo Chung, Dong-Won Lee, Sang-Pil Lee
  • Publication number: 20090026927
    Abstract: A display device, includes: an insulating substrate; a common electrode which is formed on the insulating substrate; a common voltage applying layer which is formed between the insulating substrate and the common electrode, and comprises an upper surface which faces the common electrode and a side surface of the opposite sides of the upper surface; and an organic insulating layer which is formed between the insulating substrate and the common electrode, and is formed with a contact hole which exposes at least a part of the side surface of the common voltage applying layer, the common electrode electrically connected to a side surface contact portion of the common voltage applying layer which is exposed through the contact hole.
    Type: Application
    Filed: February 13, 2008
    Publication date: January 29, 2009
    Inventors: Beohm-rock Choi, Un-cheol Sung, Jung-soo Rhee, Young-rok Song
  • Patent number: 7482208
    Abstract: The present invention relates to a thin film transistor array panel, a liquid crystal display, and a manufacturing method of the same. A TFT array for a LCD or an EL display is used as a circuit board for driving the respective pixels in an independent manner. The present invention provides pixel electrodes and contact assistants, which connect expansions of gate lines and data lines to an external circuit, having a structure of double layers including IZO layer and ITO layer. The ITO layer is disposed on the IZO layer. In the present invention, the pixel electrodes are formed to have double layers of IZO layer and ITO layer to avoid wires from getting damage by the ITO etchant and to prevent prove pins from having accumulation of foreign body during the gross test. In the present invention, the contact assistants may only be formed to have double layers of IZO layer and ITO layer to prevent prove pins from having accumulation of foreign body during the gross test.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: January 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Gab Kim, Je-Min Lee, Gwan-Young Cho, Jong-Tae Jeong, In-Ho Song, Hee-Hwan Choe, Sung-Chul Kang, Ho-Min Kang, Beohm-Rock Choi, Joon-Hoo Choi
  • Patent number: 7470950
    Abstract: A TFT substrate with reduced pixel defect rate is presented. The TFT substrate includes a pixel electrode, a negative line to apply a reverse voltage to the pixel electrode, and a recovery transistor including a drain electrode overlapping a part of the negative line with a insulating layer disposed between the negative line and the drain electrode. A contact hole is formed on the negative line and the drain electrode, and a bridge electrode connects the negative line and the drain electrode through the contact hole. The thin film transistor substrate and a display apparatus presented herein protect a data line assembly metal layer and decrease pixel defect. An improved reverse voltage efficiency is applied to a pixel electrode to protect a drain electrode.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: December 30, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Song-mi Hong, Jung-soo Rhee, Beohm-rock Choi, Jin-koo Chung, Jianpu Wang, Dong-won Lee
  • Patent number: 7456431
    Abstract: An organic light emitting display that includes a pixel electrode and an organic light emitting member formed on the pixel electrode. The organic light emitting member has an inclined surface, and a common electrode is formed on the light emitting member.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: November 25, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoon-Sung Um, Beohm-Rock Choi, Jae-Jin Lyu
  • Publication number: 20080266330
    Abstract: A display device includes pixels which represent first, second and third colors and white, a signal controller which operates a white initial luminance value of the white and first, second and third luminance compensation values of the first, second and third colors based on input image signals of the first, second and third colors, generates a white output image signal of the white based on a sum of at least one portion of the first, second and third luminance compensation values and the white initial luminance value, and generates first, second and third output image signals of the first, second and third colors based on remaining first, second and third luminance compensation values, and a data driver which converts the white output image signal and the first, second and third output image signals into data voltages and supplies the data voltages to the pixels to display an image.
    Type: Application
    Filed: December 6, 2007
    Publication date: October 30, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyong-Tae PARK, Alexander ARKHIPOV, Beohm-Rock CHOI, Young-Rok SONG
  • Publication number: 20080266329
    Abstract: A display device includes; a plurality of pixels which individually display one of a first color, a second color, a third color, and white, a signal processor which receives input image signals corresponding to the first to third colors, modifies color temperatures represented by the input image signals, compensates luminances of the input image signals, and converts the input image signals corresponding to the first to third colors into output image signals corresponding to the first to third colors and white as a result of the modification and compensation, and a data driver which converts the output image signals into data voltages and supplies the data voltages to the pixels.
    Type: Application
    Filed: October 31, 2007
    Publication date: October 30, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyong-Tae PARK, Beohm-Rock CHOI, Young-Rok SONG
  • Publication number: 20080258618
    Abstract: A display panel for an organic light emitting display including a plurality of anode electrodes and a cathode electrode that is supplied with a predetermined voltage and includes a first portion facing the anode electrodes and a second portion receiving the predetermined voltage and having a different cross section than the first portion. A plurality of light emitting members is arranged between the anode electrodes and the cathode electrode, and a conductive line transmits the predetermined voltage and contacts the second portion of the cathode electrode.
    Type: Application
    Filed: June 25, 2008
    Publication date: October 23, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jin-Koo CHUNG, Dong-Won LEE, Beohm-Rock CHOI
  • Publication number: 20080230770
    Abstract: An organic light-emitting display panel having a storage capacitor comprised of a storage electrode overlapping a power line with a first gate-insulating layer disposed therebetween, wherein the storage capacitor includes a groove portion formed on a lateral side of the power line overlapping the storage electrode so that the overlapping area of the power line and the storage electrode is kept constant, and a method of manufacturing the same.
    Type: Application
    Filed: February 28, 2008
    Publication date: September 25, 2008
    Inventors: Young-Soo Yoon, Joon-Chul Goh, Beohm-Rock Choi
  • Patent number: 7414362
    Abstract: A display panel for an organic light emitting display including a plurality of anode electrodes and a cathode electrode that is supplied with a predetermined voltage and includes a first portion facing the anode electrodes and a second portion receiving the predetermined voltage and having a different cross section than the first portion. A plurality of light emitting members is arranged between the anode electrodes and the cathode electrode, and a conductive line transmits the predetermined voltage and contacts the second portion of the cathode electrode.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: August 19, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Koo Chung, Dong-Won Lee, Beohm-Rock Choi
  • Publication number: 20080179598
    Abstract: A display device includes an insulating substrate, a switching TFT formed on the substrate that receives a data voltage and that includes a first semiconductor layer, a driving TFT formed on the substrate that includes a control terminal connected to an output terminal of the switching TFT and a second semiconductor layer including polysilicon and a halogen material, an insulating layer formed on the switching TFT and the driving TFT, a first electrode formed on the insulating layer and electrically connected to an output terminal of the driving TFT, an organic light emitting layer formed on the first electrode, and a second electrode formed on the organic light emitting layer.
    Type: Application
    Filed: January 23, 2008
    Publication date: July 31, 2008
    Inventors: Byoung-june KIM, Yong-mo Choi, Beohm-rock Choi, Sung-hoon Yang, Hwa-yeul Oh, Jae-ho Choi, Jong-moo Huh