Development Of FED Control System And FPGA Design

Field Emission Display (FED) is a novel self-luminous vacuum flat panel display. It is concerned for its advantages of FPD and CRT, thus is of great application foreground. FED is consist of panel and driving system which control system means a lot. This paper introduced the principle of FED driving system. Emphasis was put on designing, simulation and debugging the control system. The control system included the following units: video decode unit, data format conversion unit, FPGA controller, cache unit and D/A monitor. The above self-design control unit plus row and column power supply units make the whole FED driving system, thus drove the 25 inch sample and realized color video display. The 25 inch VGA sample thus fabricated could display video images, and obtained its brightness 400cd/m2 , contrast ratio 1000:1, 256 circuit gray scale.This paper refers to several creation in compatibility with large volume of FED display and conversion of different video signal.It firstly used special central chip AL300,designed correlative circuits,successfully developed VGA full-color FED console system,compatible with resolution 1280×1024, achieved functions such as multi-video signal conversion and interleaving , met VGA's resolution of FED.It firstly designed and fabricated VGA interface and separated video interface--S-video, converting several video signals to 24 bits full-colored digital image signal in FED driving system, achieved separation of luminance signal and chromatism signal,enhanced the bandwidth of luminance signal.There are several advanced functions in control system of FED driving based on FPGA. The special AL875 can support multi-display format from QVGA,VGA,SVGA to XGA in the digital RGB graphics and video frequency.Using VGA interface and D/A conversion technology, it can monitor data signal and control signal real time.The control of buffer storage carry out seamless link by double frame memory refurbish. OSD can control menu and text to adjust state by double display.FPGA technology was applied to the system , especially software design...