| The flat panel display (FPD) technology has gradually evolved into a mainstream display technology in place of CRT display. Liquid crystal display (LCD) technology is one of the maturest FPD technology and is widely used in society. LCD product has many superior characteristics such as smaller size, better image quality, lower radiation and power consumption compared with CRT product, so there are great possibilities that it would become a major display technology in place of CRT. A multifunctional LCD system solution based on T0947, which not only possesses TV function but also can be used as image monitor, PC display and digital video display, is developed in this paper. The hardware board includes several major components: TV tuner, a decoder of video signal, a TMDS receiver, an A/D conversion chip, a LCD interfacing and controlling chip, an On Screen Display (OSD) chip. This system can recognize automatically all kinds of video sources (PAL/NTSC/SECAM), PC signals of different modes (from VGA to SXGA) and digital TV signals. These signals will be processed respectively and exported in needed format displayed on LCD panels. Different signal resources can be selected easily. The circuits and relative software of all the main modules of the system are discussed detailedly in this paper. The final result of the debug proves that this solution is reliable, flexible and has a high performance/price ratio.
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