Seung Nam Park
Seung Nam Park, Seoul KR
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20110156936 | MOBILE INDUSTRY PROCESSOR INTERFACE - An optimized Mobile Industry Processor Interface (MIPI) includes a transmitter physical (PHY) layer configured to convert input data into serial data and transmit the serial data in synchronization with a high-speed clock, a receiver PHY layer configured to convert the serial data into 8-bit parallel data in synchronization with the clock received from the transmitter, a bit merge block configured to merge the parallel data received from the receiver PHY layer so as to form 32-bit data using multiple lanes and to transmit the 32-bit data to a receiver protocol layer, the receiver protocol layer being configured to decode and recognize the data received from the bit merge block. | 06-30-2011 |
20110157249 | REFERENCE VOLTAGE GENERATING CIRCUIT AND METHOD FOR GENERATING GAMMA REFERENCE VOLTAGE - A reference voltage generating circuit includes a voltage divider, color signal selectors, voltage selectors, voltage drivers and an output driver. The voltage divider outputs first to N-th divided voltages using first and second reference voltages. Each color signal selector generates a divided voltage selection signal for one of RGB color signals. Each voltage selector selects and outputs one of the first to N-th divided voltages output from the voltage divider as a tap voltage for one of the RGB color signals based on the divided voltage selection signal generated by the corresponding color signal selector. Each voltage driver retains the tap voltage output from the corresponding voltage selector and outputs the retained voltage for one of the RGB color signals. The output driver finally outputs gamma reference voltages for one of the RGB color signals using the retained tap voltages output from the voltage drivers. | 06-30-2011 |
Seung Nam Park, Daejeon KR
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20110227598 | APPARATUS AND METHOD FOR INSPECTING HOMOGENEITY OF SOLAR CELL QUANTUM EFFICIENCY USING IMAGING DEVICE - The present invention relates to an apparatus and a method for inspecting quantum efficiency homogeneity of a solar cell using a spatial light modulating device. The apparatus includes a light emitting device configured to radiate predetermined light; a spatial light modulating device configured to change a light path of rays emitted from the light emitting device according to individual control of a plurality of pixels; a spatial light modulating device controller configured to individually control the states of the plurality of pixels; a solar cell which the rays passing through or reflected from the spatial light modulating device irradiate; and a calculation controller configured to calculate quantum efficiency of the solar cell based on a photocurrent signal generated from the solar cell. | 09-22-2011 |
20120229801 | INTEGRATING SPHERE PHOTOMETER AND MEASURING METHOD OF THE SAME - Provided are an integrating sphere photometer and a measuring method of the same. The integrating sphere photometer includes an integrating sphere including a left hemisphere and a right hemisphere, a photometer disposed on the center surface of the right hemisphere, a photometer baffle disposed in front of the photometer to be spaced apart therefrom, a light source to be tested disposed at the center region of the integrating sphere to illuminate light to at least an illumination region of the left hemisphere, an auxiliary lamp part disposed in the vicinity of a contact region between the left hemisphere and the right hemisphere to illuminate light to the illumination region, and an auxiliary lamp baffle disposed around the auxiliary lamp part to prevent the light emitted from the light source to be tested from being directly illuminated to the auxiliary lamp part and also to prevent the light emitted from the auxiliary lamp part from being directly illuminated to the light source to be tested. | 09-13-2012 |
20120320371 | INTEGRATING SPHERE PHOTOMETER AND MEASURING METHOD OF THE SAME - An integrating sphere photometer and a measuring method of the same are provided to precisely measure a directional light source. The integrating sphere photometer includes an integrating sphere having a plurality of through-holes, a plurality of photometers disposed at the through-holes, baffles disposed in front of the photometers to be spaced apart therefrom, an auxiliary light source disposed inside the integrating sphere, an auxiliary baffle disposed in front of the auxiliary light source, and a summing unit of output signals of the photometers under the illumination of a light source to be measured disposed in the central area inside the integrating sphere. | 12-20-2012 |
20130099102 | INTEGRATING SPHERE PHOTOMETER AND MEASURING METHOD OF THE SAME - Provided are an integrating sphere photometer and a measuring method of the same. The integrating sphere photometer includes a plurality of photodetectors, an integrating sphere having through-holes formed to correspond to the photodetectors, baffles disposed inside the integrating sphere in front of the photodetectors to be spaced apart from the photodetectors, a photometer disposed at a through-hole, and an adjustment unit adjusting output signals of the photodetectors to have the same output signal with respect to light illuminated from a point-like standard light source disposed at a center region in the integrating sphere. | 04-25-2013 |
Seung Nam Park, Gyeonggi-Do KR
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20130249507 | APPARATUS AND METHOD FOR CONTROLLING PULSE FREQUENCY MODULATION IN SINGLE-INDUCTOR DUAL-OUTPUT POWER CIRCUIT - An apparatus configured to control a pulse frequency modulation in a single-inductor dual-output power circuit. The apparatus fixes a pulse width of one of a maximum on-time pulse signal (which is used to define a maximum on-time during which a current flowing through the inductor is generated) and a minimum off-time pulse signal (which is used to define a minimum off-time during which either the boost voltage converter or the buck-boost voltage converter produces a positive voltage or a negative voltage). The apparatus adjusts a pulse width of the other pulse signal. | 09-26-2013 |
20130258224 | APPARATUS AND METHOD FOR CONTROLLING DOT INVERSION IN LIQUID CRYSTAL DISPLAY DEVICE - An apparatus that controls dot inversion in a liquid crystal display device. The apparatus includes a ground switch unit to alternately output positive and negative data voltages on positive and negative voltage lines. The ground switch unit performs a switching operation for a pre-charge of a ground voltage when the positive and negative data voltages are alternated with each other. The apparatus includes a positive switch unit to perform an alternate switching operation depending on the combination of first switching and body voltages to supply the positive data voltage to a sub-pixel, and a negative switch unit to perform an inverse-alternate switching operation depending on the combination of second switching and body voltages to supply the negative data voltage to the sub-pixel. | 10-03-2013 |