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  本文選題：LED顯示屏 + 灰度掃描��； 參考：《重慶大學》2010年碩士論文

【摘要】： LED大屏幕顯示系統(tǒng)是一種綜合應用電子技術、光電技術以及控制技術的高科技產品,因具有動態(tài)范圍廣、亮度高、響應速度快、工作性能穩(wěn)定等特點日漸成為顯示媒體中的佼佼者,現已廣泛應用于工業(yè)、廣告、體育賽場、交通等諸多領域。目前,LED顯示屏屏體結構和用戶要求的顯示參數都趨于多樣化,而傳統(tǒng)的掃描控制系統(tǒng)支持的屏體結構單一,難以滿足用戶需求,因此,設計一種支持多種屏體結構,滿足不同用戶要求的掃描控制系統(tǒng)具有很好的應用前景。 本論文設計一套支持多線掃描屏體的掃描控制系統(tǒng),其分辨率、灰度級以及亮度級均可按用戶要求調整。系統(tǒng)以計算機的數字可視化接口(DVI)輸出作為數據源,以千兆以太網作為傳輸媒介,將計算機中的視頻圖像實時動態(tài)的顯示在LED大屏幕上。主要內容包括以下幾個方面: 1.分析現有的視頻數據遠距離傳輸方式及工作原理,設計與千兆以太網進行數據交換的數據收發(fā)電路,通過選擇正確的傳輸方式和耦合方式,確定相應的系統(tǒng)參數,保證數據交換的實時性和穩(wěn)定性。 2.分析視頻數據在掃描控制系統(tǒng)中的組織結構以及存儲方式,設計以大容量SDRAM為存儲器的數據緩存模塊,針對SDRAM操作時序的復雜性,應用硬件描述語言實現SDRAM制器,以方便其它邏輯模塊對SDRAM的讀寫操作。 3.分析LED顯示屏驅動電路的接口時序,LED顯示屏的灰度形成原理以及掃描原理,設計掃描信號產生模塊,驅動屏體顯示,并使系統(tǒng)支持多亮度級的調節(jié)。 4.設計視頻數據的組織結構,使系統(tǒng)支持多線掃描屏體,設計數據在緩存模塊中的存儲方式以及數據讀寫控制邏輯,使系統(tǒng)更加靈活,能支持多種分辨率以及多灰度級的調整。 所設計的LED大屏幕掃描控制系統(tǒng),其各模塊的仿真和測試結果表明設計達到要求,整個控制系統(tǒng)可驅動多線掃描屏體,并且分辨率,灰度等級和亮度級均可按用戶要求進行調整,具有較高的應用價值。
[Abstract]:LED large screen display system is a kind of high technology product which synthetically applies electronic technology, optoelectronic technology and control technology, because of its wide dynamic range, high brightness and fast response speed. The characteristics of stable working performance have become outstanding in the display media, and have been widely used in industry, advertising, sports arena, transportation and many other fields. At present, the screen structure and display parameters of LED display screen tend to be diversified, but the screen structure supported by traditional scanning control system is single, so it is difficult to meet the needs of users. The scanning control system, which meets different user requirements, has a good application prospect. In this paper, a scanning control system supporting multi-line scanning screen is designed. Its resolution, gray level and brightness level can be adjusted according to the user's requirements. The system uses the digital visual interface (DVI) output of the computer as the data source and the gigabit Ethernet as the transmission medium. The video images in the computer are dynamically displayed on the large LED screen in real time. The main elements include the following: 1. This paper analyzes the current remote transmission mode and working principle of video data, designs a data transceiver circuit for data exchange with Gigabit Ethernet, and determines the corresponding system parameters by selecting the correct transmission mode and coupling mode. Ensure the real-time and stability of data exchange. 2. This paper analyzes the organization structure and storage mode of video data in scanning control system, and designs a data buffer module with large capacity SDRAM as memory. Aiming at the complexity of SDRAM operation timing, a SDRAM generator is implemented by using hardware description language. In order to facilitate other logic modules to read and write SDRAM operation. 3. The principle of gray level formation and scanning principle of LED display screen are analyzed, and the generating module of scanning signal is designed to drive the screen body display, and the system supports the adjustment of multi-brightness level. 4. Design the organization structure of video data, make the system support multi-line scanning screen, design the storage mode of data in the buffer module and control logic of data reading and writing, make the system more flexible, can support the adjustment of multi-resolution and multi-gray level. The simulation and test results of each module of the LED large screen scan control system show that the design meets the requirements, and the whole control system can drive the multi-line scanning screen and the resolution. The gray level and luminance level can be adjusted according to the requirements of the user, which has high application value.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2010
【分類號】：TN873

【引證文獻】

相關碩士學位論文 前1條

1 張偉;LED顯示屏控制系統(tǒng)的設計及在鐵路信號中的應用[D];西南交通大學;2012年

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本文編號：1794728