Patents by Inventor Woong-Kyu Min
Woong-Kyu Min 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: 9082369Abstract: An inverter of driving a light source for a display device is provided. The inverter includes a temperature sensor sensing a temperature and generating an output voltage based on the sensed temperature, a buffer generating an output signal having a state depending on the output voltage of the temperature sensor, an oscillator generating an oscillating signal having a frequency depending on the state of the output signal of the buffer, and an inverter performing a switching operation in response to the oscillating signal from the oscillator. Therefore, the inverter increases the voltage applied to the light source when the temperature near the light source is lower than a predetermined temperature since the frequency of the oscillating signal is increased.Type: GrantFiled: May 12, 2014Date of Patent: July 14, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Woong-Kyu Min, Hyeon-Yong Jang
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Publication number: 20140247205Abstract: An inverter of driving a light source for a display device is provided. The inverter includes a temperature sensor sensing a temperature and generating an output voltage based on the sensed temperature, a buffer generating an output signal having a state depending on the output voltage of the temperature sensor, an oscillator generating an oscillating signal having a frequency depending on the state of the output signal of the buffer, and an inverter performing a switching operation in response to the oscillating signal from the oscillator. Therefore, the inverter increases the voltage applied to the light source when the temperature near the light source is lower than a predetermined temperature since the frequency of the oscillating signal is increased.Type: ApplicationFiled: May 12, 2014Publication date: September 4, 2014Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Woong-Kyu MIN, Hyeon-Yong JANG
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Patent number: 8723780Abstract: An inverter of driving a light source for a display device is provided. The inverter includes a temperature sensor sensing a temperature and generating an output voltage based on the sensed temperature, a buffer generating an output signal having a state depending on the output voltage of the temperature sensor, an oscillator generating an oscillating signal having a frequency depending on the state of the output signal of the buffer, and an inverter performing a switching operation in response to the oscillating signal from the oscillator. Therefore, the inverter increases the voltage applied to the light source when the temperature near the light source is lower than a predetermined temperature since the frequency of the oscillating signal is increased.Type: GrantFiled: April 24, 2008Date of Patent: May 13, 2014Assignee: Samsung Display Co., Ltd.Inventors: Woong-Kyu Min, Hyeon-Yong Jang
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Patent number: 7492345Abstract: The present invention relates to a liquid crystal display of a time divisional color display, which includes a plurality of pixels having liquid crystal capacitors, respectively, and light is not supplied to some pixels and light supplied to other pixels. Preferably, data voltages are applied to the pixels to which light is not supplied and data voltages are not applied to the pixel to which light is supplied. Accordingly, since a liquid crystal panel assembly is divided into several areas to be scanned sequentially and a light source of a light source unit corresponding to the area being scanned is maintained in light-off state, it is possible to secure enough data scan time as well as to increase light-on-time of the light sources. With this, time to charge electric charges of the liquid crystal capacitors is increased to improve image quality, and, according as light-on time of the light sources is increased, clearness of the image quality is also increased.Type: GrantFiled: July 22, 2002Date of Patent: February 17, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Bo Jin, Cheol-Woo Park, Woong-Kyu Min
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Patent number: 7443366Abstract: A pixel circuit of an organic EL display includes an EL device, first and second switching devices, a driving thin film transistor, and a capacitor. The first switching device switches data voltages applied to data lines in response to the selection signal applied to a scan line and the second switching device connects gate and drain of the driving thin film transistor in response to a compensation signal applied to a compensation line. The driving thin film transistor supplies electric current to the organic EL device in response to the data voltage inputted to a gate from the first switching device and the capacitor maintains the data voltage applied to the gate of the driving thin film transistor for a predetermined period.Type: GrantFiled: September 19, 2002Date of Patent: October 28, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beohm-Rak Choi, Joon-Hoo Choi, Chong-Chul Chae, Woong-Kyu Min, Kyong-Ju Shin
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Patent number: 7417616Abstract: An inverter for a display includes; an inverter controller generating a carrier signal for pulse width modulation and a lamp driving signal having on-time and off-time by pulse width modulating a dimming signal based on the carrier signal and controlling the on-time of the lamp driving signal in response to at least one of a vertical synchronization signal and a vertical synchronization start signal from the signal controller, a power switching element transmitting a DC voltage in response to a signal from the inverter controller, and a voltage booster for driving a lamp in response to a signal from the switching element, wherein the inverter controller includes a control block which generates the carrier signal and the lamp driving signal, a time constant setting block which determines a time constant of the carrier signal, and an initiation block which resets the time constant given by the time constant setting block.Type: GrantFiled: September 4, 2003Date of Patent: August 26, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Woong-Kyu Min, Hyeon-Yong Jang
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Publication number: 20080198183Abstract: An inverter of driving a light source for a display device is provided. The inverter includes a temperature sensor sensing a temperature and generating an output voltage based on the sensed temperature, a buffer generating an output signal having a state depending on the output voltage of the temperature sensor, an oscillator generating an oscillating signal having a frequency depending on the state of the output signal of the buffer, and an inverter performing a switching operation in response to the oscillating signal from the oscillator. Therefore, the inverter increases the voltage applied to the light source when the temperature near the light source is lower than a predetermined temperature since the frequency of the oscillating signal is increased.Type: ApplicationFiled: April 24, 2008Publication date: August 21, 2008Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Woong-Kyu MIN, Hyeon-Yong JANG
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Patent number: 7187354Abstract: The present invention relates to an organic electroluminescent display and a driving method thereof, which divides one frame into a plurality of subframes. Since the present invention divides one frame into several subframes, and drives an organic EL device with the subframes assigned to the upper bits and with the corrected gray data for representing the detailed grays between the basic grays during the subframes assigned to the lower bits, it is possible to represent sufficient number of grays regardless of the unstable luminescence characteristics of an organic EL device.Type: GrantFiled: September 19, 2002Date of Patent: March 6, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Woong-Kyu Min, Cheol-Woo Park, Ho-Yong Jeong
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Publication number: 20060050047Abstract: The present invention relates to a liquid crystal display of a time divisional color display, which includes a plurality of pixels having liquid crystal capacitors, respectively, and light is not supplied to some pixels and light supplied to other pixels. Preferably, data voltages are applied to the pixels to which light is not supplied and data voltages are not applied to the pixel to which light is supplied. Accordingly, since a liquid crystal panel assembly is divided into several areas to be scanned sequentially and a light source of a light source unit corresponding to the area being scanned is maintained in light-off state, it is possible to secure enough data scan time as well as to increase light-on-time of the light sources. With this, time to charge electric charges of the liquid crystal capacitors is increased to improve image quality, and, according as light-on time of the light sources is increased, clearness of the image quality is also increased.Type: ApplicationFiled: July 22, 2002Publication date: March 9, 2006Applicant: Samsung Electronics Co., Ltd.Inventors: Bo Jin, Cheol-Woo Park, Woong-Kyu Min
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Publication number: 20050156829Abstract: A pixel circuit of an organic EL display includes an EL device, first and second switching devices, a driving thin film transistor, and a capacitor. The first switching device switches data voltages applied to data lines in response to the selection signal applied to a scan line and the second switching device connects gate and drain of the driving thin film transistor in response to a compensation signal applied to a compensation line. The driving thin film transistor supplies electric current to the organic EL device in response to the data voltage inputted to a gate from the first switching device and the capacitor maintains the data voltage applied to the gate of the driving thin film transistor for a predetermined period.Type: ApplicationFiled: September 19, 2002Publication date: July 21, 2005Inventors: Beom-Rak Choi, Joon-Hoo Choi, Chong-Chul Chae, Woong-Kyu Min, Jyong-Ju Shin
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Publication number: 20050078064Abstract: The present invention relates to an organic electroluminescent display and a driving method thereof, which divides one frame into a plurality of subframes. Since the present invention divides one frame into several subframes, and drives an organic EL device with the subframes assigned to the upper bits and with the corrected gray data for representing the detailed grays between the basic grays during the subframes assigned to the lower bits, it is possible to represent sufficient number of grays regardless of the unstable luminescence characteristics of an organic EL device.Type: ApplicationFiled: September 19, 2002Publication date: April 14, 2005Inventors: Woong-Kyu Min, Cheol-Woo Park, Ho-Yong Jeong
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Publication number: 20040056825Abstract: An inverter of driving a light source for a display device is provided. The inverter includes a temperature sensor sensing a temperature and generating an output voltage based on the sensed temperature, a buffer generating an output signal having a state depending on the output voltage of the temperature sensor, an oscillator generating an oscillating signal having a frequency depending on the state of the output signal of the buffer, and an inverter performing a switching operation in response to the oscillating signal from the oscillator. Therefore, the inverter increases the voltage applied to the light source when the temperature near the light source is lower than a predetermined temperature since the frequency of the oscillating signal is increased.Type: ApplicationFiled: September 4, 2003Publication date: March 25, 2004Inventors: Woong-Kyu Min, Hyeon-Yong Jang