顯(xian)(xian)示(shi)屏(ping)(ping)的亮度(du)(du)：要在一個環境(jing)中正確的顯(xian)(xian)示(shi)信(xin)息，要有足夠的亮度(du)(du)以(yi)(yi)圖(tu)像(xiang)的實際對(dui)比度(du)(du)，尤其是用在戶外環境(jing)條件惡(e)劣的戶外LED顯(xian)(xian)示(shi)屏(ping)(ping)。所以(yi)(yi)，根(gen)據使(shi)用環境(jing)的不(bu)同顯(xian)(xian)示(shi)屏(ping)(ping)要有相應(ying)的亮度(du)(du)來。顯(xian)(xian)示(shi)屏(ping)(ping)投入使(shi)用后，做為發光源的LED管的亮度(du)(du)就開始(shi)衰(shuai)減(jian)(jian)，所以(yi)(yi)亮度(du)(du)衰(shuai)減(jian)(jian)的速率是LED顯(xian)(xian)示(shi)屏(ping)(ping)的重要性能之一。
場(chang)(chang)(chang)(chang)掃(sao)描(miao)電(dian)(dian)(dian)路：包(bao)括場(chang)(chang)(chang)(chang)振蕩和場(chang)(chang)(chang)(chang)輸出兩(liang)部分。場(chang)(chang)(chang)(chang)振蕩電(dian)(dian)(dian)路在同步信號下(xia)，形(xing)成(cheng)場(chang)(chang)(chang)(chang)頻鋸齒(chi)波，鋸齒(chi)波再由場(chang)(chang)(chang)(chang)輸出電(dian)(dian)(dian)路功率放大后加至(zhi)場(chang)(chang)(chang)(chang)偏轉線(xian)圈(quan)，形(xing)成(cheng)掃(sao)描(miao)電(dian)(dian)(dian)流(liu)，使電(dian)(dian)(dian)子槍發射(she)出的(de)(de)電(dian)(dian)(dian)子上下(xia)拉(la)開。場(chang)(chang)(chang)(chang)幅和場(chang)(chang)(chang)(chang)中心調節的(de)(de)功能也是在場(chang)(chang)(chang)(chang)掃(sao)描(miao)電(dian)(dian)(dian)路中實(shi)現的(de)(de)，此外還輸出場(chang)(chang)(chang)(chang)頻鋸齒(chi)波到枕形(xing)校(xiao)正電(dian)(dian)(dian)路，以校(xiao)正水平枕形(xing)失真。
LCD顯(xian)(xian)(xian)示(shi)器(qi)即(ji)液晶(jing)顯(xian)(xian)(xian)示(shi)器(qi)。它的(de)優點(dian)有機身薄、占地小和(he)輻射小。LCD顯(xian)(xian)(xian)示(shi)器(qi)內部有很多液晶(jing)粒子，它們(men)有規律地排列(lie)成(cheng)一定的(de)形狀，并且它們(men)每一面的(de)顏色(se)都不(bu)同(tong)，分為紅色(se)、綠(lv)色(se)和(he)藍色(se)。這三原(yuan)色(se)能(neng)還原(yuan)成(cheng)任(ren)意的(de)其他(ta)顏色(se)。當顯(xian)(xian)(xian)示(shi)器(qi)收(shou)到(dao)顯(xian)(xian)(xian)示(shi)數(shu)據時，會(hui)控制每個液晶(jing)粒子轉動(dong)到(dao)不(bu)同(tong)顏色(se)的(de)面，從(cong)而組合成(cheng)不(bu)同(tong)的(de)顏色(se)和(he)圖像(xiang)。也因為這樣，LCD顯(xian)(xian)(xian)示(shi)器(qi)的(de)缺點(dian)有色(se)彩不(bu)夠(gou)艷和(he)可(ke)視角度不(bu)大等。
LED顯(xian)示器集微電子技術、計算機技術、信息處理(li)技術于(yu)一體，以(yi)其色(se)彩鮮艷、動(dong)態(tai)范圍廣、亮度高(gao)、壽命長、工作穩(wen)定(ding)可靠等(deng)(deng)優點，成為具優勢的新一代(dai)顯(xian)示設備。目前，LED顯(xian)示器已廣泛應用于(yu)大(da)型廣場、體育(yu)場館、證(zheng)券交(jiao)易大(da)廳等(deng)(deng)場所(suo)，可以(yi)滿足不同環境(jing)的需要。
一(yi)般濕度保持在30%-80%之間(jian)，顯(xian)(xian)示(shi)器(qi)都能正常工(gong)作(zuo)，但一(yi)旦室內(nei)濕度高于80%后，顯(xian)(xian)示(shi)器(qi)內(nei)部(bu)就會(hui)產生結露現象(xiang)。其內(nei)部(bu)的(de)電(dian)(dian)源變壓器(qi)和其他線圈受潮后也易(yi)產生漏電(dian)(dian)，甚(shen)至有可能造成連線短路；而顯(xian)(xian)示(shi)器(qi)的(de)高壓部(bu)位(wei)則極(ji)易(yi)產生放電(dian)(dian)現象(xiang)；機內(nei)元器(qi)件容易(yi)生銹(xiu)、腐蝕，嚴重(zhong)時(shi)(shi)(shi)會(hui)使電(dian)(dian)路板發生短路。因(yin)此，LCD顯(xian)(xian)示(shi)器(qi)注意防潮，長時(shi)(shi)(shi)間(jian)不用(yong)的(de)顯(xian)(xian)示(shi)器(qi)，可以定期通電(dian)(dian)工(gong)作(zuo)一(yi)段時(shi)(shi)(shi)間(jian)，讓顯(xian)(xian)示(shi)器(qi)工(gong)作(zuo)時(shi)(shi)(shi)產生的(de)熱量(liang)將機內(nei)的(de)潮氣驅趕出去。
花(hua)(hua)屏(ping)(ping)通常是(shi)由于(yu)顯(xian)(xian)(xian)(xian)示(shi)器(qi)(qi)不(bu)支持主(zhu)機(ji)送來(lai)的(de)(de)(de)顯(xian)(xian)(xian)(xian)示(shi)模(mo)式，往(wang)往(wang)是(shi)高于(yu)顯(xian)(xian)(xian)(xian)示(shi)器(qi)(qi)的(de)(de)(de)顯(xian)(xian)(xian)(xian)示(shi)模(mo)式，引起屏(ping)(ping)幕的(de)(de)(de)圖像(xiang)混(hun)亂(luan)，無(wu)法看清楚(chu)屏(ping)(ping)幕上的(de)(de)(de)圖像(xiang)和文字(zi)。如果是(shi)具有模(mo)式自動(dong)(dong)識別的(de)(de)(de)顯(xian)(xian)(xian)(xian)示(shi)器(qi)(qi)，有可能是(shi)黑屏(ping)(ping)狀(zhuang)態，但(dan)這時(shi)(shi)面板(ban)下方(fang)(fang)指示(shi)燈(deng)為綠色(se)。這時(shi)(shi)重(zhong)新(xin)啟動(dong)(dong)即(ji)可恢復。如果這種(zhong)方(fang)(fang)法不(bu)行(xing)，可以在把顯(xian)(xian)(xian)(xian)卡(ka)驅動(dong)(dong)程(cheng)序刪除，然后在重(zhong)新(xin)安裝顯(xian)(xian)(xian)(xian)卡(ka)驅動(dong)(dong)即(ji)可。還(huan)有在顯(xian)(xian)(xian)(xian)卡(ka)顯(xian)(xian)(xian)(xian)存發生故(gu)障時(shi)(shi)會出現屏(ping)(ping)幕上固定(ding)位置顯(xian)(xian)(xian)(xian)示(shi)混(hun)亂(luan)，而其他地(di)方(fang)(fang)卻(que)顯(xian)(xian)(xian)(xian)示(shi)正常。也有顯(xian)(xian)(xian)(xian)卡(ka)損壞造成花(hua)(hua)屏(ping)(ping)的(de)(de)(de)。
