Samsung 2220WM Service Manual - Page 45

13 Reference Information 13-1 Technical Terms -TFT-LCD Thin film Transistor Liquid Crystal Display -ADC(Analog to Digital Converter) This is a circuit that converts from analog signal to digital signals. -PLL(Phase Locked Loop) During progressing ADC, Device makes clock synchronizing HSYNC with Video clock -Inverter Device that supplies Power to LCD panel lamp. This device generates about 1,500~2,000V. AC Adapter Device that converts AC(90V~240V) to DC(+12V or 14V) -SMPS(Switching Mode Power Supply) Switching Mode Power supply. This design technology is used to step up/down the input power by switching on/off -FRC(Frame Rate Controller) Technology that changes the number of frames displayed on screen per second. TFT-LCD panel requires 60 frames per second. This technology is needed to convert input image to 60 frames per second regardless input frame quantity. -FINE The "Fine" adjustment is used to adjust visibility by controlling phase difference. -COARSE This adjustment adjusts the display by tuning Video clock and PLL clock. -L.V.D.S.(Low Voltage Differential Signaling) A kind of transmission method for Digital. It can be used from Main PBA to Panel. -DDC(Display data channel) It is a communication method between a Host Computer and related equipment. It enables Plug and Play between PC and Monitor. -EDID Extended Display Identification Data PC can recognize monitor information, such as Product data, Product name, Display mode, Serial number, Signal source, etc. Data is recognized via DDC Line linking PC and Monitor. -Dot Pitch The image on a monitor is composed of red, green and blue dots. The closer the dots, the higher the resolution. The distance between two dots of the same color is called the 'Dot Pitch'. Unit: mm -Image Scaler Technology that convert various input resolution to other resolution.(ex. 640* 480 to 1024*768) -Auto Configuration(Auto adjustment) This is an algorithm to adjust monitor to optimum condition by pushing one key. -OSD(On Screen Display) Customers can easily control the screen settings using the OSD. 46