【摘要】： LED顯示屏是利用發(fā)光二極管構(gòu)成的點(diǎn)陣模塊或像素組成大面積顯示屏幕的一種新型信息顯示媒體,它憑借色彩鮮艷、動(dòng)態(tài)性能好、使用壽命長(zhǎng)、環(huán)境適應(yīng)能力強(qiáng)、性價(jià)比高、耗能小等特點(diǎn),廣泛應(yīng)用于廣告、證券、信息傳播、新聞發(fā)布等各個(gè)場(chǎng)合。 伴隨著LED顯示屏應(yīng)用范圍及應(yīng)用技術(shù)的推廣與普及,關(guān)于LED屏顯示控制系統(tǒng)的研究也越來(lái)越多。然而現(xiàn)有的研究,大多側(cè)重于基于單片機(jī)、ARM、DSP、FPGA等不同芯片的不同版本的實(shí)現(xiàn),很多顯示系統(tǒng)都存在存儲(chǔ)效率不高、訪問(wèn)速度不快、修改數(shù)據(jù)不方便等問(wèn)題,限制了LED信息顯示系統(tǒng)的應(yīng)用及發(fā)展。本文正是在此背景下,對(duì)LED顯示系統(tǒng)的數(shù)據(jù)存儲(chǔ)結(jié)構(gòu)進(jìn)行了深入的研究。 文章首先介紹了系統(tǒng)的整體設(shè)計(jì)方案,給出了系統(tǒng)的設(shè)計(jì)目標(biāo),明確了設(shè)計(jì)的方向。緊接著,給出了系統(tǒng)的結(jié)構(gòu)框圖并對(duì)系統(tǒng)中各主要部分分別做了介紹,對(duì)他們各自的功能做了簡(jiǎn)要說(shuō)明。文章提出了一種新的MCU與CPLD協(xié)同的方法：片內(nèi)乒乓協(xié)同法,該方法只需要一塊獨(dú)立的顯示緩存。文章劃分了顯示系統(tǒng)中數(shù)據(jù)的種類,并在此基礎(chǔ)上對(duì)上位機(jī)與下位機(jī)通信過(guò)程中用到的通信協(xié)議進(jìn)行了詳細(xì)的設(shè)計(jì)。 文章對(duì)數(shù)據(jù)結(jié)構(gòu)的基本知識(shí)做了介紹,在此基礎(chǔ)上對(duì)LED顯示系統(tǒng)的數(shù)據(jù)存儲(chǔ)結(jié)構(gòu)進(jìn)行了深入的研究,設(shè)計(jì)了三種顯示系統(tǒng)存儲(chǔ)空間分配策略：固定地址分配、連續(xù)分配和動(dòng)態(tài)分配,四種顯示系統(tǒng)存儲(chǔ)結(jié)構(gòu)：順序表結(jié)構(gòu)、鏈表結(jié)構(gòu)、索引結(jié)構(gòu)和復(fù)合結(jié)構(gòu)。文章介紹了它們的基本思想,并用程序設(shè)計(jì)語(yǔ)言對(duì)它們進(jìn)行了描述,分析了他們各自的優(yōu)缺點(diǎn)并給出了適用的場(chǎng)合。最后給出了它們的一個(gè)應(yīng)用實(shí)例,設(shè)計(jì)了一種復(fù)合存儲(chǔ)結(jié)構(gòu),綜合了分配策略及存儲(chǔ)結(jié)構(gòu)的知識(shí)且應(yīng)用了多種存儲(chǔ)結(jié)構(gòu),使得系統(tǒng)同時(shí)具有訪問(wèn)速度快及存儲(chǔ)空間利用率高等優(yōu)點(diǎn)。 文章對(duì)系統(tǒng)實(shí)現(xiàn)中圖文信息的編輯、字模信息的提取、特效顯示方式的設(shè)計(jì)以及上位機(jī)與下位機(jī)之間的通訊程序的設(shè)計(jì)做了詳細(xì)設(shè)計(jì)與研究。其中圖文信息的編輯重點(diǎn)介紹了圖像的壓縮與分頁(yè)、字符的分頁(yè)顯示技術(shù)；字模信息的提取重點(diǎn)分析了它的提取過(guò)程；上位機(jī)與下位機(jī)之間的通訊則從通信兩端的角度對(duì)通訊程序作了詳細(xì)介紹；特效顯示方式的介紹則以向上連移算法及向左連移算法兩個(gè)典型算法為例作了詳細(xì)的描述。 文章最后對(duì)控制系統(tǒng)的各功能模塊一一做了測(cè)試,經(jīng)測(cè)試,這些功能模塊均達(dá)到設(shè)計(jì)目標(biāo),且操作簡(jiǎn)單、方便。文章借助工具對(duì)顯示系統(tǒng)的的數(shù)據(jù)存儲(chǔ)結(jié)構(gòu)做了測(cè)試,經(jīng)測(cè)試,系統(tǒng)完全按照設(shè)計(jì)的分配策略來(lái)分配存儲(chǔ)空間,完全按照設(shè)計(jì)的存儲(chǔ)結(jié)構(gòu)來(lái)存儲(chǔ)數(shù)據(jù),具有存儲(chǔ)空間利用率高、存儲(chǔ)方式靈活等優(yōu)點(diǎn)。
[Abstract]:LED display screen is a new type of information display media which uses lattice module or pixel composed of light-emitting diode to form a large area display screen. It has bright colors, good dynamic performance, long service life, strong environmental adaptability and high performance-price ratio. Low energy consumption and other characteristics, widely used in advertising, securities, information dissemination, press release and other occasions. With the popularization and popularization of LED display screen application scope and application technology, there are more and more research on LED screen display control system. However, most of the existing research focuses on the implementation of different versions of different chips, such as single chip microcomputer, ARM,DSP,FPGA and so on. Many display systems have some problems, such as low storage efficiency, slow access speed, inconvenient data modification and so on. It limits the application and development of LED information display system. Under this background, the data storage structure of LED display system is deeply studied in this paper. In this paper, the overall design scheme of the system is introduced, the design goal of the system is given, and the direction of the design is defined. Then, the structure block diagram of the system is given and the main parts of the system are introduced respectively, and their respective functions are briefly described. In this paper, a new collaborative method between MCU and CPLD is proposed, which only needs an independent display cache. In this paper, the types of data in the display system are divided, and the communication protocols used in the communication process between the upper computer and the lower computer are designed in detail. In this paper, the basic knowledge of data structure is introduced, on the basis of which the data storage structure of LED display system is deeply studied, and three storage space allocation strategies of display system are designed: fixed address allocation. Continuous allocation and dynamic allocation, four kinds of display system storage structures: sequential table structure, linked list structure, index structure and composite structure. This paper introduces their basic ideas, describes them with programming language, analyzes their respective advantages and disadvantages, and gives a suitable occasion. Finally, an application example of them is given, and a composite storage structure is designed, which integrates the knowledge of allocation strategy and storage structure, and applies a variety of storage structures. The system has the advantages of fast access speed and high utilization of storage space at the same time. In this paper, the editing of graphic and text information, the extraction of font information, the design of special effect display mode and the design of communication program between upper computer and lower computer are designed and studied in detail. Among them, the editing of graphic and text information focuses on image compression and paging, character pagination display technology, the extraction of font information focuses on the analysis of its extraction process. The communication between the upper computer and the lower computer is introduced in detail from the point of view of both ends of the communication, and the special effect display mode is described in detail by taking two typical algorithms, the upward continuous algorithm and the left continuous moving algorithm, as examples. At the end of the paper, each function module of the control system is tested one by one. After testing, these functional modules achieve the design goal, and the operation is simple and convenient. In this paper, the data storage structure of the display system is tested with the help of tools. after testing, the system allocates storage space according to the designed allocation strategy and stores the data according to the designed storage structure, which has high utilization ratio of storage space. Flexible storage mode and other advantages.
【學(xué)位授予單位】：湖南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2010
【分類號(hào)】：TP273

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 楊內(nèi);;LED顯示屏智能配置的設(shè)計(jì)與實(shí)現(xiàn)[J];現(xiàn)代顯示;2011年03期

相關(guān)碩士學(xué)位論文 前2條

1 徐孟龍;太陽(yáng)能無(wú)線LED信息顯示系統(tǒng)的研究[D];湖南師范大學(xué);2011年

2 邱云平;基于ARM的LED顯示屏設(shè)計(jì) 及顯示效果的算法研究[D];西南交通大學(xué);2012年

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本文編號(hào)：2478987