本文選題：ARM + LED視頻　； 參考：《武漢理工大學(xué)》2008年碩士論文

【摘要】： 近年來,LED顯示系統(tǒng)在信息顯示領(lǐng)域得到了廣泛的應(yīng)用,迅速發(fā)展成一種電子廣告媒體,而且已形成具有相當(dāng)發(fā)展?jié)摿Φ碾娮赢a(chǎn)業(yè)。隨著北京申辦年奧運會的成功,必將進(jìn)一步推動LED顯示屏產(chǎn)業(yè)的發(fā)展。 就目前的發(fā)展趨勢來看,LED視頻顯示系統(tǒng)是一個發(fā)展趨勢。而目前的LED視頻系統(tǒng)必須以PC機為視頻源,一對一的聯(lián)機、同步顯示,屬于同步顯示系統(tǒng),使用不是很靈活方便。一般用于大型購物廣場的戶外播放視頻廣告、電視和電影,還可用于大型體育比賽場所,實時直播賽況。盡管異步顯示系統(tǒng)可脫機使用,方便靈活,但不能夠播放視頻信息。 從商業(yè)角度來說,技術(shù)先進(jìn)的不一定就是能在市場上完全能行的通的。隨著電子廣告市場發(fā)展,城市街道的視頻廣告也必將是一種發(fā)展趨勢,因為具有動感的彩色視頻廣告比普通的廣告壁紙更能吸引人們眼球,同時也為城市添加一道靚麗的風(fēng)景。而具有壽命長、成本低、亮度高、視角大、可視距離遠(yuǎn)等特點的LED顯示系統(tǒng)比較適合此場所的顯示要求。針對這一特點,開發(fā)一套小型、可脫機播放視頻的LED顯示系統(tǒng),具有重要的意義和市場價值,不僅有助于城市電子廣告產(chǎn)業(yè)的發(fā)展,也必將推進(jìn)小型LED視頻系統(tǒng)的研究進(jìn)程以及在其他領(lǐng)域的廣泛應(yīng)用。 因此,本課題以此作為研究工作的起點。本文在分析LED顯示屏工作原理后,針對目前LED異步顯示系統(tǒng)存在的缺點,結(jié)合LED同步顯示系統(tǒng)的主要功能及技術(shù)指標(biāo),提出解決關(guān)鍵問題的總體技術(shù)方案。該系統(tǒng)采用ARM+FPGA的硬件構(gòu)架,利用ARM處理器可移植操作系統(tǒng)、自帶LCD控制器、可實現(xiàn)圖形界面系統(tǒng)的特點,將ARM系統(tǒng)作為視頻源,FPGA用于顯示數(shù)據(jù)重構(gòu)、灰度掃描控制的電路設(shè)計,有效解決了該系統(tǒng)的關(guān)鍵技術(shù)問題。 本文的核心是ARM系統(tǒng)軟硬件設(shè)計及FPGA邏輯設(shè)計兩大部分。首先根據(jù)系統(tǒng)的總體設(shè)計方案實現(xiàn)控制系統(tǒng)硬件平臺的設(shè)計;然后在此基礎(chǔ)上通過對嵌入式Linux內(nèi)核的移植、LCD驅(qū)動程序的開發(fā)及Qtopia圖形界面系統(tǒng)的實現(xiàn),完成了ARM系統(tǒng)的軟件平臺設(shè)計;最后重點介紹了FPGA的邏輯設(shè)計及仿真分析,并驗證了各模塊的功能設(shè)計的正確性。
[Abstract]:In recent years, LED display system has been widely used in the field of information display, and has developed rapidly into an electronic advertising media, and has formed an electronic industry with considerable development potential. With the success of Beijing's bid for the Olympic Games, the LED display industry will be further promoted. According to the current development trend, LED video display system is a development trend. The current LED video system must be PC as the video source, one to one online, synchronous display, belong to the synchronous display system, the use is not very flexible and convenient. Generally used for outdoor video advertising, television and movies in large shopping malls, but also for large-scale sports venues, real-time live broadcast of the game. Although the asynchronous display system can be used offline, it is convenient and flexible, but it can not play video information. From the commercial point of view, the advanced technology is not necessarily able to be fully operational in the market. With the development of electronic advertising market, video advertising in city streets is bound to be a development trend, because color video advertisements with dynamic sense can attract people's attention more than ordinary advertising wallpaper, and add a beautiful scenery to the city at the same time. The LED display system with the characteristics of long life, low cost, high brightness, large angle of view and long visual distance is more suitable for the display requirements of this place. In view of this characteristic, the development of a small LED display system that can play video offline is of great significance and market value, which is not only helpful to the development of urban electronic advertising industry. It will also promote the research process of small LED video system and its wide application in other fields. Therefore, this paper takes this as the starting point of the research work. This paper analyzes the working principle of LED display screen, aiming at the shortcomings of current LED asynchronous display system, combined with the main functions and technical specifications of LED synchronous display system, puts forward the overall technical scheme to solve the key problems. The system adopts the hardware frame of arm FPGA, the portable operating system of arm processor, and the LCD controller, which can realize the characteristics of graphical interface system. The arm system is used as the video source FPGA to reconstruct the display data. The circuit design of gray-scale scanning control effectively solves the key technical problems of the system. The core of this paper is the hardware and software design of arm system and the FPGA logic design. Firstly, the hardware platform of the control system is designed according to the overall design scheme of the system, and then, through the development of the embedded Linux kernel transplant LCD driver and the realization of the Qtopia graphical interface system, Finally, the logic design and simulation analysis of FPGA are introduced, and the correctness of the functional design of each module is verified.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2008
【分類號】：TP273

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前4條

1 李歡歡;基于嵌入式技術(shù)的LED大屏幕顯示系統(tǒng)的研究[D];武漢工業(yè)學(xué)院;2010年

2 劉其洪;LED屏顯控制系統(tǒng)設(shè)計與數(shù)據(jù)存儲結(jié)構(gòu)研究[D];湖南師范大學(xué);2010年

3 徐孟龍;太陽能無線LED信息顯示系統(tǒng)的研究[D];湖南師范大學(xué);2011年

4 范煒;基于千兆以太網(wǎng)的LED燈飾DVI視頻處理器的研制[D];華南理工大學(xué);2011年

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本文編號：1992726