Patents by Inventor Tae Choi

Tae 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: 20070194336
    Abstract: A light emitting device package including: a heat dissipating substrate including a cavity; a first conductive pattern formed on the cavity; a light emitting device installed on the first conductive pattern; and a second conductive pattern formed on the heat dissipating substrate at a periphery of the first conductive pattern. The second conductive pattern is electrically separated from the first conductive pattern, and the first and second conductive patterns supply power required for operating the light emitting device.
    Type: Application
    Filed: September 14, 2006
    Publication date: August 23, 2007
    Inventors: Su-ho Shin, Kyu Ho Shin, Jin-seung Choi, Soon Cheol Kweon, Seung-tae Choi, Ki-hwan Kwon, Chang Youl Moon
  • Patent number: 7259798
    Abstract: The present invention provides an image compensation apparatus, by which a hardware structure is simplified and by which resolution of a remanded color gamut is enhanced when an inputted digital image is compensated to fit the characteristics of a display device. The present invention includes a 3-dimensional look-up table storing 3-dimensional transformation data corresponding to upper n-bits of an input image and a color interpolation unit outputting a final color-transformed image by performing linear interpolation using the 3-dimensional transformation data outputted from the 3-dimensional look-up table and 3-dimensional data corresponding to lower m-bits of the input image.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: August 21, 2007
    Assignee: LG Electronics, Inc.
    Inventors: Seung Yup Lee, Dong Il Han, Byung Tae Choi, Kyoung Hoon Jang
  • Publication number: 20070145393
    Abstract: A light emitting device package including a transparent cover having an electrode pattern formed on a bottom surface thereof; a light emitting device installed below the transparent cover and electrically connected to an external circuit via the electrode pattern; a fixing resin which fixes the light emitting device onto the bottom surface of the transparent cover; and a metal slug provided under the fixing resin to dissipate heat away from the light emitting device.
    Type: Application
    Filed: July 31, 2006
    Publication date: June 28, 2007
    Inventors: Arthur Darbinian, Seung Tae Choi, Ki Hwan Kwon, Chang Youl Moon, Kyu Ho Shin
  • Patent number: 7235772
    Abstract: In a CMOS image sensor of the invention, a dynamic range is varied at a per-pixel level by a light amount to prevent saturation without degrading color reproduction of an overall image. A photo diode generates charges in accordance with a received light amount. A drive transistor amplifies the charges generated in the photodiode at a given gain. Further, a saturation detector receives an output voltage from the drive transistor and judges the image sensor saturated if the output voltage is beyond a limited level. A switch switches on/off in response to the judgment of the saturation detector. Also, a plurality of floating diffusions store the charges of the photodiode transferred through the switch. The floating diffusions are selectively connected to both the photodiode and a gate of the drive transistor at on/off the switch.
    Type: Grant
    Filed: June 8, 2006
    Date of Patent: June 26, 2007
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joo Yul Ko, Won Tae Choi, Deuk Hee Park, Shin Jae Kang
  • Publication number: 20070130769
    Abstract: A method for fabricating a metal micro heat pipe with a polygonal cross-section to allow working fluid to flow by capillary force generated at edges of the polygonal of the micro heat pipe. The polygonal cross-section is formed of a single metal layer via a single drawing process. The micro heat pipe is formed of a single metal plate.
    Type: Application
    Filed: February 1, 2007
    Publication date: June 14, 2007
    Inventors: Seok Moon, Ho Yun, Sang Ko, Gunn Hwang, Tae Choy, Chi Jun, Youn Kim
  • Publication number: 20070114626
    Abstract: The invention relates a photodiode device and a photodiode array using the same capable of detecting short and long wavelengths of visible light at a high efficiency. The photodiode device includes: a first conductivity type semiconductor substrate; a second conductivity type buried layer, an intrinsic semiconductor layer and a first conductivity type semiconductor layer formed on the semiconductor substrate in their order; and a second conductivity type well layer formed on the first conductivity type semiconductor layer. The second conductivity type buried layer, the intrinsic semiconductor layer and the first conductivity type semiconductor layer form a pin junction diode for detecting the long wavelength of visible light, and the first conductivity type semiconductor layer and the second conductivity type well layer form a p-n junction diode for detecting a short wavelength of light.
    Type: Application
    Filed: September 19, 2006
    Publication date: May 24, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Shin Jae KANG, Won Tae CHOI, Joo Yul KO, Deuk Hee PARK
  • Patent number: 7212685
    Abstract: Disclosed herein is a method for processing image data of an optical mouse. In the method for processing image data of an optical mouse, direction and size values of motion vectors which are image data consecutively inputted from an image pixel array are filtered with respect to X and Y axes by a filter. A predetermined number of motion vectors converted by and outputted from the filter are accumulated, and the accumulated values are mapped to conversion values to attenuate noise components and amplify directionality of the motion vectors depending on a speed of the optical mouse by a mapper. The values mapped by the mapper in a plurality of pipes are stored, and a value obtained by adding the plural stored values to each other and dividing the added result value by a conversion factor is transmitted to a personal computer (PC) interface such as a Universal Serial Bus (USB) or PS/2.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: May 1, 2007
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Keun-Woo Park, Jong-Sik Jeong, Kyoung-Joong Min, Kang-ju Kim, Byoung-Won Hwang, Won-Tae Choi
  • Publication number: 20070080723
    Abstract: Provided is an output buffer circuit having a slew rate increasing part configured with a switching element. The output buffer circuit can obtain an output voltage having a high slew rate even though a smaller amount of a bias current than that required in a conventional output buffer is used. Therefore, the output buffer circuit can reduce power consumption. In the output buffer circuit with a compensation capacitive load, an input part has two input terminal receiving differential input voltage signals, and an output part increases a gain of the differential input voltages. A current source biases the output part, and a slew rate increasing part is connected to the output part and the compensation capacitive load. The slew rate increasing part includes a switching element to increase a slew rate of the output buffer circuit.
    Type: Application
    Filed: August 31, 2006
    Publication date: April 12, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Youn Joong Lee, Won Tae Choi, Chan Woo Park, Byung Hoon Kim
  • Publication number: 20070063193
    Abstract: An organic memory device having a memory active region formed by an embossing structure. This invention provides an organic memory device including a substrate, a first electrode formed on the substrate, an organic memory layer formed on the first electrode, a second electrode formed on the organic memory layer and an embossing structure provided at the organic memory layer to form a memory active region.
    Type: Application
    Filed: April 12, 2006
    Publication date: March 22, 2007
    Inventors: Won Joo, Kwang Lee, Sang Lee, Tae Choi
  • Publication number: 20070039164
    Abstract: An LED package and a fabrication method thereof are provided. The LED package includes an upper metal plate having an LED-receiving hole therein; a lower metal plate disposed under the upper metal plate; and an insulator which the upper metal plate and the lower metal plate from each other. A portion of the lower metal plate is exposed via the LED-receiving hole and an LED is mounted on the exposed portion of the lower metal plate and is electrically connected to both of the upper and lower metal plates. A protective cover encloses and protects exposed surfaces of the upper and lower metal plates.
    Type: Application
    Filed: May 3, 2006
    Publication date: February 22, 2007
    Inventors: Ki-hwan Kwon, Kyu-ho Shin, Soon-cheol Kweon, Chang-youl Moon, Arthur Darbinian, Seung-tae Choi, Su-ho Shin
  • Publication number: 20070040719
    Abstract: The present invention relates to a digital/analog converter.
    Type: Application
    Filed: June 30, 2006
    Publication date: February 22, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: BYUNG HOON KIM, YOUN JOONG LEE, CHAN WOO PARK, WON TAE CHOI
  • Publication number: 20070030535
    Abstract: The present invention relates to a data scan system and a data scan method using DDR. The data scan system includes an input section receiving data; first and second DDR memories that stores the data by using a page in which the col address increases horizontally; a DDR controller that stores the data in the first and second DDR memories or reads the stored data from the first and second DDR memories; and an output section that outputs the data read by the DDR controller. When reading the data stored in the first and second DDR memory, the DDR controller simultaneously reads at least two columns of data of the page and stores the simultaneously read data in an output buffer.
    Type: Application
    Filed: June 30, 2006
    Publication date: February 8, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: JIN YONG KANG, WON TAE CHOI, HAN CHUL JO, BYOUNG WON HWANG
  • Publication number: 20070030050
    Abstract: The present invention relates to a temperature-compensated bias source circuit. The temperature-compensated bias source circuit includes a bandgap reference circuit that outputs a first temperature-compensated reference voltage and a second reference voltage having a positive slope with respect to temperature; a voltage/current converter that converts the first and second reference voltages into a reference current; and an output buffer that is connected to the bandgap reference circuit and the voltage/current converter and buffers the first and second reference voltages, output by the bandgap reference circuit, so as to output to the voltage/current converter.
    Type: Application
    Filed: June 6, 2006
    Publication date: February 8, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Youn Joong Lee, Won Tae Choi, Chan Woo Park, Byung Hoon Kim
  • Publication number: 20070030370
    Abstract: The present invention relates to an active pixel array of a CMOS image sensor. The active pixel array includes a pixel sensor array in which a pixel sensor which detects first and second light signals, of which the wavelengths are different from each other, among all wavelengths of light signals so as to generate current and voltage signals and a pixel sensor which detects a third light signal with a predetermined wavelength so as to generate a current or voltage signal are alternately arranged; and a color filter array that is formed on the pixel sensor array and in which a filter which transmits all wavelengths of light signals and a filter which transmits the third signal with a predetermined wavelength are alternately arranged.
    Type: Application
    Filed: June 12, 2006
    Publication date: February 8, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Shin Jae Kang, Won Tae Choi, Joo Yul Ko, Deuk Hee Park
  • Patent number: 7174039
    Abstract: A virtual reality embodying system uses 2D images and HDRI data taken of a target object through a camera to embody virtual reality. A modeling unit compares the 2D image's coordinate with a real coordinate to calculate a transform matrix, calculates a vanishing point of a reference vector, uses the vanishing point to calculate a camera matrix, uses the camera matrix and the transform matrix to calculate a rotation matrix and a translation matrix, and uses the rotation matrix and the translation matrix to model the 2D image into a virtual model. A rendering unit uses the HDRI data as texture to render the virtual model, and embodies the HDRI into an extended VRML node to apply the virtual model to the VRML environment.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: February 6, 2007
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Bon-Ki Koo, Sung-Ye Kim, Hae-Dong Kim, Jae-Chul Kim, Byoung-Tae Choi
  • Publication number: 20070023614
    Abstract: A CMOS image sensor has a function to compensate a photodetector pixel from a dark current by using a dark pixel. In the CMOS image sensor, the photodetector pixel includes a first reset transistor with a drain connected to a supply voltage and a photodetector diode connected between a source of the first reset transistor and a ground. The dark pixel includes a mirror transistor with a drain connected to the supply voltage and a gate and source connected to a gate of the first reset transistor and a dark photodiode shielded from external light. The dark photodiode is connected between the source of the mirror diode and the ground. The dark pixel provides a current having a magnitude equal with that of a dark current flowing through the dark photodiode to the photodetector diode. This delays the saturation rate of the CMOS image sensor pixel and enhances the dynamic range thereof.
    Type: Application
    Filed: July 17, 2006
    Publication date: February 1, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Deuk Hee PARK, Won Tae CHOI, Shin Jae KANG, Joo Yul KO
  • Publication number: 20070023612
    Abstract: The invention provides a unit pixel of a CMOS image sensor which compensates for a dark current generated in a photo diode to enhance its driving range. In the unit pixel, a photo diode generates a charge in accordance with a received light amount. A drive has a gate for receiving the charge in the photo diode to output as an electrical signal and a drain to which a power voltage is applied. Also, a saturation detector receives a gate voltage of the drive transistor and judges the drive transistor saturated if an output voltage is smaller than a preset reference voltage. In addition, a switch connects or disconnects between the power voltage and the gate of the drive transistor in response to the judgment of the saturation detector.
    Type: Application
    Filed: July 17, 2006
    Publication date: February 1, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Joo Yul KO, Won Tae CHOI, Deuk Hee PARK, Shin Jae KANG
  • Publication number: 20070023893
    Abstract: An LED package includes a substrate having an electrically conductive portion and an electrically non-conductive portion composed of an oxide of the conductive portion; an LED mounted on the conductive portion and electrically connected to the conductive portion; a first electrode disposed on the non-conductive portion and electrically connected to the LED by a wire; and a second electrode disposed on the substrate and electrically connected to the LED.
    Type: Application
    Filed: April 21, 2006
    Publication date: February 1, 2007
    Inventors: Su-ho Shin, Soon-cheol Kweon, Kyu-ho Shin, Ki-hwan Kwon, Seung-tae Choi, Chang-youl Moon
  • Patent number: 7170494
    Abstract: An optical navigation sensor device and an image processing method using a 2-dimensional sequential image process are disclosed. A pre-processor stores digital voltage values of respective pixels of an image received from a pre-processor in a memory, performs a pre-process for the digital voltage values of respective pixels sequentially received from the memory, thereby producing a pre-processed current image, and extracts a pre-processed current central image from the pre-processed current image. A motion coordinate calculator stores the pre-processed current central image as X/Y-axis reference image candidates, determines replacement of X/Y-axis reference images for calculation of motion coordinate values of a next pre-processed image in accordance with X/Y-axis motions of the pre-processed current image, and compares the pre-processed current image with the X/Y-axis reference images, thereby calculating X/Y-axis motion coordinate values of the pre-processed current image.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: January 30, 2007
    Assignee: Samsung Electro-Mechanics Co., Ltd
    Inventors: Keun-Woo Park, Won-Tae Choi, Kyoung-Joong Min, Byoung-Won Hwang, Kang-ju Kim
  • Publication number: 20070001582
    Abstract: A light emitting diode (LED) array module includes a plurality of LEDs; and a substrate which mounts the LEDs and has a built-in cooling device for cooling heat generated when the LED is driven. The cooling device includes a heat radiation space formed on the substrate and a minute passage member which is wick- or mesh-structured to form a plurality of minute passages that operate by a heat pipe principle in the heat radiation space. The cooling device operating by the heat pipe principle is integrally formed on the substrate mounted with the LEDs, so heat radiation performance of the LEDs is enhanced, such that the LEDs can operate stably for a long time.
    Type: Application
    Filed: June 23, 2006
    Publication date: January 4, 2007
    Inventors: Su-ho Shin, Chang-youl Moon, Kyu-ho Shin, Soon-cheol Kweon, Seung-tae Choi, Ki-hwan Kwon