| 摘要 |
PURPOSE: A computer system and its image processing method is provided to reduce an EMI(Electromagnetic Interference) coming in an LCD by using a spectrum modulator so that it can reduce an EMI reducing structure. CONSTITUTION: The system comprises an LCD(20), an LCD transmitter(15), a graphic chip set(10), a cable harness(18), a connector(17), and a spectrum modulator(25). An RGB data bus is interfaced between the graphic chip set(10) and the LCD transmitter(15). The LCD transmitter(15) converts the RGB data bus into LVDS interface. As a result, in a case of using 2 channels, about 40 lines for transmitting data and clock signals are used between the graphic chip set(10) and the LCD transmitter(15), and about 20 lines being used between the LCD transmitter(15) and the LCD(20). The spectrum modulator(25) eliminates the EMI from clock signal lines between the graphic chip set(10) and the LCD transmitter(15). The spectrum modulator(25) spreads a frequency band or moves a core frequency of digital data. The spectrum modulator(25) can be installed on all the clock signal lines between the graphic chip set(10) and the LCD transmitter(15) according to a degree of the EMI.
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