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).
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Patent number: 10398976Abstract: 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: GrantFiled: December 28, 2016Date of Patent: September 3, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyu Tae Lim, Chi Ho Cha, Hwa Hyun Cho, Yoon Ho Ko
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Patent number: 9852679Abstract: 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: GrantFiled: August 27, 2015Date of Patent: December 26, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-seok Oh, Chi-ho Cha, Myeong-jun Chae, Suk-gyun Lim
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Publication number: 20170340969Abstract: 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: ApplicationFiled: December 28, 2016Publication date: November 30, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyu Tae LIM, Chi Ho CHA, Hwa Hyun CHO, Yoon Ho KO
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Publication number: 20160133178Abstract: 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: ApplicationFiled: August 27, 2015Publication date: May 12, 2016Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Min-seok OH, Chi-ho CHA, Myeong-jun CHAE, Suk-gyun LIM
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Patent number: 9318072Abstract: 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: GrantFiled: October 14, 2014Date of Patent: April 19, 2016Assignee: 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
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Patent number: 8970605Abstract: 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: GrantFiled: April 20, 2012Date of Patent: March 3, 2015Assignee: Samsung Electronics Co., Ltd.Inventor: Chi Ho Cha
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Publication number: 20150029201Abstract: 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: ApplicationFiled: October 14, 2014Publication date: January 29, 2015Inventors: Chi Ho CHA, Sang Kyu LEE, Hyun-Chul LEE, Jong Seon KIM, Hyo Jin KIM, Hak-Seong LEE, Seung Jin IN, Hyon Jun CHOI
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Patent number: 8878995Abstract: 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: GrantFiled: August 31, 2012Date of Patent: November 4, 2014Assignee: Samsung Electronics Co., LtdInventors: Chi Ho Cha, Sang Kyu Lee, Hyun-Chul Lee, Jong Seon Kim, Hyo Jin Kim, Hak-Seong Lee, Seung Jin In, Hyon Jun Choi
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Patent number: 8806260Abstract: 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: GrantFiled: June 6, 2011Date of Patent: August 12, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Chi-ho Cha, Hoon-sang Jin
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Publication number: 20130100121Abstract: 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: ApplicationFiled: April 20, 2012Publication date: April 25, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Chi Ho Cha
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Publication number: 20130057763Abstract: 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: ApplicationFiled: August 31, 2012Publication date: March 7, 2013Inventors: Chi Ho CHA, Sang Kyu LEE, Hyun-Chul LEE, Jong Seon KIM, Hyo Jin KIM, Hak-Seong LEE, Seung Jin IN, Hyon Jun CHOI
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Patent number: 8275588Abstract: 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: GrantFiled: April 17, 2009Date of Patent: September 25, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Chi-Ho Cha
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Patent number: 8165866Abstract: 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: GrantFiled: August 13, 2007Date of Patent: April 24, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Chi-Ho Cha, Hoon-Sang Jin, Jae-Geun Yun
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Publication number: 20110239035Abstract: 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: ApplicationFiled: June 6, 2011Publication date: September 29, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Chi-ho CHA, Hoon-sang JIN
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Patent number: 7949510Abstract: 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: GrantFiled: May 11, 2007Date of Patent: May 24, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Chi-Ho Cha, Hoon-Sang Jin, Hyun-Uk Jung
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Patent number: 7707021Abstract: 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: GrantFiled: February 9, 2007Date of Patent: April 27, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Chi-Ho Cha, Hyunuk Jung
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Publication number: 20090271174Abstract: 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: ApplicationFiled: April 17, 2009Publication date: October 29, 2009Inventor: CHI-HO CHA
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Publication number: 20080061855Abstract: 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: ApplicationFiled: September 11, 2007Publication date: March 13, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Chi-ho CHA, Hoon-sang JIN
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Publication number: 20080046228Abstract: 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: ApplicationFiled: August 13, 2007Publication date: February 21, 2008Inventors: Chi-Ho Cha, Hoon-Sang Jin, Jae-Geun Yun
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Publication number: 20070266355Abstract: 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: ApplicationFiled: May 11, 2007Publication date: November 15, 2007Inventors: Chi-Ho CHA, Hoon-Sang Jin, Hyun-Uk Jung