Patents by Inventor Hee Chul Hwang

Hee Chul Hwang 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: 20110080358
    Abstract: A liquid crystal display (LCD) with a built-in touch screen includes: a first substrate including a sensor area having a plurality of photosensors; a second substrate positioned over the first substrate, and including a color filter, a light receiving portion, and a transparent electrode layer and a front polarizing plate; an LCD panel including a liquid crystal layer interposed between the first and second substrates; a touch screen driver circuit to measure a capacitance variation sensed through a first sensing line connected to the transparent electrode layer and to calculate a touch area using optical information sensed through a second sensing line connected to the photosensors when a contact object is in contact with the LCD panel, and to output position information of the contact object, sensed by determining whether a touch occurs and whether a multi-touch occurs using the capacitance variation and the touch area.
    Type: Application
    Filed: July 12, 2010
    Publication date: April 7, 2011
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Jin-Woo PARK, Sang-Uk Kim, Hee-Chul HWANG, Mu-Kyung JEON, Hideo YOSHIMURA
  • Publication number: 20110057908
    Abstract: A liquid crystal display device having a built in touch screen including a first substrate having pixel units comprising: a plurality of pixels displaying an image and sensor regions having light sensors formed adjacent to the corresponding pixel units to sense a position of a contacted object; a second substrate disposed on the first substrate, comprising: color filters formed on regions corresponding to the pixel units and first black matrices formed on regions corresponding to the sensor regions of the pixel units; a liquid crystal layer interposed between the first substrate and the second substrate; and a backlight assembly disposed on a bottom portion of the first substrate and providing light to the first substrate and the second substrate. The liquid crystal display device with the built in touch screen determines a point of contact on the touch screen.
    Type: Application
    Filed: May 28, 2010
    Publication date: March 10, 2011
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Jin-Woo PARK, Sang-Uk Kim, Hee-Chul Hwang, Mu-Kyung Jeon, Hideo Yoshimura
  • Publication number: 20100288871
    Abstract: The present invention provides a remote-controlled ornithopter capable of flying forward in the upright position, which includes X-shaped main wings? having opposite phases to offset moments applied to a fuselage of the ornithopter. The ornithopter includes the fuselage (100), the X-shaped main wings (200), which are provided on the front end of the fuselage, tail wings (300), which are provided on the medial portion or the rear end of the fuselage, and a tail rotor (400), which controls a direction in which the fuselage flies. The ornithopter further includes a drive unit (500), which operates the main wings, and a flight control unit (600), which has a receiver to receive a signal for controlling the drive unit and the tail rotor. The ornithopter further includes a remote controller (700), which transmits the signal for controlling the drive unit and the tail rotor to the receiver.
    Type: Application
    Filed: January 11, 2008
    Publication date: November 18, 2010
    Inventors: Hee Chul Hwang, II Hyun Paik, Jae Yeon Kim
  • Publication number: 20100283756
    Abstract: A method for recognizing a touch of an object on a display device including optical sensors, the method including: detecting a touch of an object by utilizing a contact-detecting layer in the display device; generating an image of the touch of the object corresponding to sensor signals sensed by the optical sensors; detecting touch points corresponding to the image of the touch of the object; and determining information of the touch of the object based on the detected touch points.
    Type: Application
    Filed: January 26, 2010
    Publication date: November 11, 2010
    Inventors: Ja-Seung Ku, Jae-Shin Kim, Min-Jeung Lee, Hee-Chul Hwang
  • Publication number: 20100097349
    Abstract: A method of detecting a touch point includes detecting an edge image of a finger image from an input image, generating a touch point image utilizing the detected edge image, and calculating coordinates of the touch point from the touch point image. The touch point image may be generated by setting a center at a position separated by a set distance in a gradient direction with respect to a position where the edge image is detected, and generating the touch point image by summing up gradient magnitude values with respect to a set area based on the set center. The coordinates of multiple touch points may be calculated by updating coordinates of the multiple touch points according to the gradient magnitude values accumulatively summed up in the multiple touch points based on a comparison between the coordinates of the multiple touch points and the set distance.
    Type: Application
    Filed: September 24, 2009
    Publication date: April 22, 2010
    Inventors: Jae-Shin Kim, Ja-Seung Ku, Min-Jeung Lee, Hee-Chul Hwang