制作室外屏也要考慮的幾個(gè)問(wèn)題

室外屏的主要問(wèn)題如下：
　　顯示屏安裝在室外，經(jīng)常日曬雨淋，風(fēng)吹塵蓋，工作環(huán)境惡劣。電子設(shè)備被淋濕或嚴(yán)重受潮會(huì)引起 短路甚至起火，引發(fā)故障甚至火災(zāi)，造成損失。 顯示屏可能會(huì)受到雷電引起的強(qiáng)電強(qiáng)磁襲擊。
　　環(huán)境溫度變化極大。顯示屏工作時(shí)本身就要產(chǎn)生一定的熱量，如果環(huán)境溫度過(guò)高而散熱又不良，集 成電路可能工作不正常，甚至被燒毀，從而使顯示系統(tǒng)無(wú)法正常工作。
　　受眾面寬，視距要求遠(yuǎn)、視野要求廣；環(huán)境光變化大，特別是可能受到陽(yáng)光直射。
　　針對(duì)以上特殊要求，室外顯示屏必須做到：
　　屏體及屏體與建筑的結(jié)合部必須嚴(yán)格防水防漏；屏體要有良好的排水措施，一旦發(fā)生積水能順利排 放。
　　在顯示屏及建筑物上安裝避雷裝置。顯示屏主體和外殼保持良好接地，接地電阻小于3歐姆，使雷電 引起的大電流及時(shí)泄放。
　　安裝通風(fēng)設(shè)備降溫，使屏體內(nèi)部溫度在-10℃～40℃之間。屏體背后上方安裝軸流風(fēng)機(jī)，排出熱量。
　　選用工作溫度在-40℃～80℃之間的工業(yè)級(jí)集成電路芯片，防止冬季溫度過(guò)低使顯示屏不能啟動(dòng)。
　　為了保證在環(huán)境光強(qiáng)烈的情況下遠(yuǎn)距離可視，必須選用超高亮度led

很好的建議，支持下{:1_149:}

支持  支持...............

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