Patents by Inventor Chi-ho Cha

Chi-ho Cha 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: 10398976
    Abstract: A display controller includes a frame rate converter creating a second reference image having a second frame rate higher than a first frame rate of a first reference image, based on the first reference image, a buffer storing the second reference image, and an image processor creating an output image by selecting at least a portion of the second reference image.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: September 3, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyu Tae Lim, Chi Ho Cha, Hwa Hyun Cho, Yoon Ho Ko
  • Patent number: 9852679
    Abstract: A display device is provided. The display device includes a display panel including a plurality of pixel arrangement areas, a data driving unit including a plurality of source drivers, and a timing controller configured to process data that is input from an external device and configured to generate output data. Each of the plurality of pixel arrangement areas includes a plurality of pixels arranged in areas in which a plurality of gate lines intersect a plurality of data lines. Each of the plurality of source drivers outputs display data to data lines of its corresponding pixels. The timing controller classifies the plurality of pixel arrangement areas based on a distance between the timing controller and each of the plurality of pixel arrangement areas, and transmits the output data to the data driving unit at at least two transmission speeds based on the classification.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: December 26, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Min-seok Oh, Chi-ho Cha, Myeong-jun Chae, Suk-gyun Lim
  • Publication number: 20170340969
    Abstract: A display controller includes a frame rate converter creating a second reference image having a second frame rate higher than a first frame rate of a first reference image, based on the first reference image, a buffer storing the second reference image, and an image processor creating an output image a user by selecting at least a portion of the second reference image.
    Type: Application
    Filed: December 28, 2016
    Publication date: November 30, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyu Tae LIM, Chi Ho CHA, Hwa Hyun CHO, Yoon Ho KO
  • Publication number: 20160133178
    Abstract: A display device is provided. The display device includes a display panel including a plurality of pixel arrangement areas, a data driving unit including a plurality of source drivers, and a timing controller configured to process data that is input from an external device and configured to generate output data. Each of the plurality of pixel arrangement areas includes a plurality of pixels arranged in areas in which a plurality of gate lines intersect a plurality of data lines. Each of the plurality of source drivers outputs display data to data lines of its corresponding pixels. The timing controller classifies the plurality of pixel arrangement areas based on a distance between the timing controller and each of the plurality of pixel arrangement areas, and transmits the output data to the data driving unit at at least two transmission speeds based on the classification.
    Type: Application
    Filed: August 27, 2015
    Publication date: May 12, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Min-seok OH, Chi-ho CHA, Myeong-jun CHAE, Suk-gyun LIM
  • Patent number: 9318072
    Abstract: An operation method of a display driver includes generating a count value by counting a period of a synchronization signal related to a synchronization packet received from a host, receiving a mode change command from the host, the mode change command indicating a change from a video mode transmitting first image data to a display by bypassing a frame memory to a command mode transmitting second image data to the display through the frame memory, and generating an internal synchronization signal having a period substantially equal to the period of the synchronization signal by using the count value based on the mode change command after a last pulse of the synchronization signal is generated. A time interval between the last pulse and a first pulse of the internal synchronization signal is equal to the period of the synchronization signal.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: April 19, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chi Ho Cha, Sang Kyu Lee, Hyun-Chul Lee, Jong Seon Kim, Hyo Jin Kim, Hak-Seong Lee, Seung Jin In, Hyon Jun Choi
  • Patent number: 8970605
    Abstract: A display driver is provided. The display driver includes a compressor outputting first data by compressing input data, a first selection circuit transmitting the input data or the first data to a memory in response to a first selection signal, a de-compressor outputting third data by de-compressing second data output from the memory, and a display interface for transmitting fourth data generated by processing the third data to a display.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: March 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chi Ho Cha
  • Publication number: 20150029201
    Abstract: An operation method of a display driver includes generating a count value by counting a period of a synchronization signal related to a synchronization packet received from a host, receiving a mode change command from the host, the mode change command indicating a change from a video mode transmitting first image data to a display by bypassing a frame memory to a command mode transmitting second image data to the display through the frame memory, and generating an internal synchronization signal having a period substantially equal to the period of the synchronization signal by using the count value based on the mode change command after a last pulse of the synchronization signal is generated. A time interval between the last pulse and a first pulse of the internal synchronization signal is equal to the period of the synchronization signal.
    Type: Application
    Filed: October 14, 2014
    Publication date: January 29, 2015
    Inventors: Chi Ho CHA, Sang Kyu LEE, Hyun-Chul LEE, Jong Seon KIM, Hyo Jin KIM, Hak-Seong LEE, Seung Jin IN, Hyon Jun CHOI
  • Patent number: 8878995
    Abstract: An operation method of a display driver includes generating a count value by counting a period of a synchronization signal related to a synchronization packet received from a host, receiving a mode change command from the host, the mode change command indicating a change from a video mode transmitting first image data to a display by bypassing a frame memory to a command mode transmitting second image data to the display through the frame memory, and generating an internal synchronization signal having a period substantially equal to the period of the synchronization signal by using the count value based on the mode change command after a last pulse of the synchronization signal is generated. A time interval between the last pulse and a first pulse of the internal synchronization signal is equal to the period of the synchronization signal.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: November 4, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Chi Ho Cha, Sang Kyu Lee, Hyun-Chul Lee, Jong Seon Kim, Hyo Jin Kim, Hak-Seong Lee, Seung Jin In, Hyon Jun Choi
  • Patent number: 8806260
    Abstract: A method and a device for generating a clock signal determine a number of pulses to be discarded from each predetermined cycle of a reference clock signal in order to obtain, on average, a target frequency. A masking pattern is created for discarding the number of pulses to be discarded from each predetermined cycle of the reference clock signal. The clock signal, which includes the target frequency, is generated by discarding the number of pulses from the reference clock signal using the masking pattern.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: August 12, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-ho Cha, Hoon-sang Jin
  • Publication number: 20130100121
    Abstract: A display driver is provided. The display driver includes a compressor outputting first data by compressing input data, a first selection circuit transmitting the input data or the first data to a memory in response to a first selection signal, a de-compressor outputting third data by de-compressing second data output from the memory, and a display interface for transmitting fourth data generated by processing the third data to a display.
    Type: Application
    Filed: April 20, 2012
    Publication date: April 25, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Chi Ho Cha
  • Publication number: 20130057763
    Abstract: An operation method of a display driver includes generating a count value by counting a period of a synchronization signal related to a synchronization packet received from a host, receiving a mode change command from the host, the mode change command indicating a change from a video mode transmitting first image data to a display by bypassing a frame memory to a command mode transmitting second image data to the display through the frame memory, and generating an internal synchronization signal having a period substantially equal to the period of the synchronization signal by using the count value based on the mode change command after a last pulse of the synchronization signal is generated. A time interval between the last pulse and a first pulse of the internal synchronization signal is equal to the period of the synchronization signal.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 7, 2013
    Inventors: Chi Ho CHA, Sang Kyu LEE, Hyun-Chul LEE, Jong Seon KIM, Hyo Jin KIM, Hak-Seong LEE, Seung Jin IN, Hyon Jun CHOI
  • Patent number: 8275588
    Abstract: An emulation system includes a first circuit for emulating a first logical part of a device, a second circuit for emulating a second logical part of the device that is different from the first logical part, wherein the first circuit is separate from the second circuit, and a third circuit connecting the first circuit and the second circuit to communicate signals between the first circuit and the second circuit.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: September 25, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chi-Ho Cha
  • Patent number: 8165866
    Abstract: An emulation system includes a controller, an emulation calculator, an emulation storage unit, and an interface unit. The emulation calculator includes a device under test (DUT) and emulates the DUT. The emulation storage unit stores emulation data of the DUT emulated by the emulation calculator under the control of the controller. The interface unit distributes and transfers the emulation data to a plurality of computers under the control of the controller.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: April 24, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-Ho Cha, Hoon-Sang Jin, Jae-Geun Yun
  • Publication number: 20110239035
    Abstract: A method and a device for generating a clock signal determine a number of pulses to be discarded from each predetermined cycle of a reference clock signal in order to obtain, on average, a target frequency. A masking pattern is created for discarding the number of pulses to be discarded from each predetermined cycle of the reference clock signal. The clock signal, which includes the target frequency, is generated by discarding the number of pulses from the reference clock signal using the masking pattern.
    Type: Application
    Filed: June 6, 2011
    Publication date: September 29, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chi-ho CHA, Hoon-sang JIN
  • Patent number: 7949510
    Abstract: A method and system for distributed simultaneous simulation are provided, the method including providing a state of at least one storage unit, providing a segment of the circuit bounded by the at least one storage unit, and simulating the segment in accordance with the state of the at least one storage unit; and the system including a memory for describing storage units of a circuit, maintaining states of the storage units, and identifying distributed segments comprising combinational logic separated by the storage units, and processing units, each for simultaneously simulating at least one of the segments in accordance with the maintained states.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: May 24, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-Ho Cha, Hoon-Sang Jin, Hyun-Uk Jung
  • Patent number: 7707021
    Abstract: A circuit emulation system and method are provided, the system including at least one trace chain and a trace memory in signal communication with the at least one trace chain for sequentially receiving values and feeding them back through the chain to their original storage unit positions; and the method including modeling the circuit, providing at least one storage unit in the model, emulating the circuit with the model, extracting a state of the at least one storage unit during emulation, storing the extracted state, and restoring the stored state through a feedback loop.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: April 27, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-Ho Cha, Hyunuk Jung
  • Publication number: 20090271174
    Abstract: An emulation system includes a first circuit for emulating a first logical part of a device, a second circuit for emulating a second logical part of the device that is different from the first logical part, wherein the first circuit is separate from the second circuit, and a third circuit connecting the first circuit and the second circuit to communicate signals between the first circuit and the second circuit.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 29, 2009
    Inventor: CHI-HO CHA
  • Publication number: 20080061855
    Abstract: A method and a device for generating a clock signal determine a number of pulses to be discarded from each predetermined cycle of a reference clock signal in order to obtain, on average, a target frequency. A masking pattern is created for discarding the number of pulses to be discarded from each predetermined cycle of the reference clock signal. The clock signal, which includes the target frequency, is generated by discarding the number of pulses from the reference clock signal using the masking pattern.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 13, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chi-ho CHA, Hoon-sang JIN
  • Publication number: 20080046228
    Abstract: An emulation system includes a controller, an emulation calculator, an emulation storage unit, and an interface unit. The emulation calculator includes a device under test (DUT) and emulates the DUT. The emulation storage unit stores emulation data of the DUT emulated by the emulation calculator under the control of the controller. The interface unit distributes and transfers the emulation data to a plurality of computers under the control of the controller.
    Type: Application
    Filed: August 13, 2007
    Publication date: February 21, 2008
    Inventors: Chi-Ho Cha, Hoon-Sang Jin, Jae-Geun Yun
  • Publication number: 20070266355
    Abstract: A method and system for distributed simultaneous simulation are provided, the method including providing a state of at least one storage unit, providing a segment of the circuit bounded by the at least one storage unit, and simulating the segment in accordance with the state of the at least one storage unit; and the system including a memory for describing storage units of a circuit, maintaining states of the storage units, and identifying distributed segments comprising combinational logic separated by the storage units, and processing units, each for simultaneously simulating at least one of the segments in accordance with the maintained states.
    Type: Application
    Filed: May 11, 2007
    Publication date: November 15, 2007
    Inventors: Chi-Ho CHA, Hoon-Sang Jin, Hyun-Uk Jung