摘 要:介紹一種實(shí)用小型的LED顯示系統(tǒng),它采用MCS51單片機(jī)控制模塊、LED顯示驅(qū)動模塊和無線通信模塊。通過無線通信模塊實(shí)現(xiàn)顯示內(nèi)容的遙控切換。在驅(qū)動電路的設(shè)計(jì)上,采用行掃描列驅(qū)動方式,增加了行掃描列驅(qū)動擴(kuò)展功能。在硬件設(shè)計(jì)中,采用結(jié)構(gòu)化的單元模塊設(shè)計(jì),具有可擴(kuò)展性,顯示亮度高且穩(wěn)定。該設(shè)計(jì)不僅可降低硬件成本,而且還可降低功耗。經(jīng)調(diào)試證明,該設(shè)計(jì)合理且實(shí)用。關(guān)鍵詞:單片機(jī); LED點(diǎn)陣; 無線通信; MC551
中圖分類號:TN9198-34文獻(xiàn)標(biāo)識碼:A
文章編號:1004-373X(2010)16-0154-03
Development of Laboratory Wireless Information Display
ZHOU Guang-kuan1, JIN Yin-bin2
(1. Communication and Information Engineering College, Xi’an Science and Technology University, Xi’an 710054, China;
2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)
Abstract: A practical miniature LED display system which adopts the MCS51 microcontroller module, LED display driving module and wireless communication module is introduced. The display content can be changed through wireless remote control. The line scanning and row driving mode is employed in the design of the drive circuit to enhance the extending function of the mode. The structurized unit module, which has the characteristics of perfect expandability, high display brightness and high stability, is used in hardware design. This design reduces not only the hardware cost, but also the consumption. The debugging result proves that the design is equitable and practical.Keywords: single-chip microcomputer; LED lattice; wireless communication;MC551
0 引 言
LED漢字動態(tài)顯示屏是利用由多塊發(fā)光二極管點(diǎn)陣(此處采用8×8點(diǎn)陣)組成的顯示屏。它與傳統(tǒng)的顯示媒體,如多彩霓虹燈、像素管電視墻、四色磁翻板等相比較,具有亮度高,對比度強(qiáng),動態(tài)顯示效果好,故障率低,能耗少,使用壽命長,組態(tài)靈活,視覺效果好,可全天候運(yùn)行等許多優(yōu)點(diǎn),已得到了廣泛的應(yīng)用[1]。
縱觀LED顯示屏發(fā)展過程,與當(dāng)代科學(xué)技術(shù)的進(jìn)步是密切相關(guān)的,國內(nèi)第一塊LED顯示屏于1982年在南京火車站建成[2]。隨著電子元器件性能的提高、大規(guī)模集成電路和計(jì)算機(jī)技術(shù)的發(fā)展,LED器件的可靠性及亮度不斷提高,成本不斷下降,特別是金融證券行業(yè)的市場需求大幅度增長,使LED顯示屏進(jìn)入快速發(fā)展階段,出現(xiàn)了多級灰度的LED視頻顯示屏[3]。本文重點(diǎn)介紹了一種4個漢字無線信息顯示板的設(shè)計(jì)。該電子信息顯示板在數(shù)據(jù)傳送和接收上采用了無線方式。在驅(qū)動電路的設(shè)計(jì)上,采用了目前廣為利用的行掃描列驅(qū)動方式,并考慮了行掃描列驅(qū)動擴(kuò)展功能。……