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 本文介紹了fed驅(qū)動系統(tǒng)的工作原理,重點論述了基于fpga的vga級彩色fed新型驅(qū)動控制系統(tǒng)的研制,這種新型fed驅(qū)動控制系統(tǒng)主要包括視頻解碼電路、數(shù)據(jù)格式轉(zhuǎn)換電路、 fpga控制電路、數(shù)據(jù)緩存電路和d / a監(jiān)控電路,配合后級列灰度調(diào)制單元和行掃描單元,組成完整的fed驅(qū)動系統(tǒng),可以驅(qū)動25英寸vga級fed顯示屏,實現(xiàn)彩色視頻顯示,樣機亮度達400cd / m2 、對比度為1000 : 1 ,灰度等級為256級。
The content of the electricity transforming of the system with profibus includes the designing of signal detecting and dealing system , the developing of the major cache unit machine control , the integration of the system diagnosis and data information , and the subordinate station diagnosis function 基于profibus現(xiàn)場總線技術(shù)的濾棒儲存輸送系統(tǒng)電氣改造設(shè)計內(nèi)容,主要從系統(tǒng)信號檢測與處理方式的改進設(shè)計、主體緩沖單元電機控制方式的改進設(shè)計、系統(tǒng)診斷及生產(chǎn)過程數(shù)據(jù)信息的集成設(shè)計和系統(tǒng)從站診斷功能設(shè)計等幾個方面講解。