顯(xian)(xian)示(shi)(shi)屏的(de)(de)(de)亮(liang)(liang)度(du)(du):要在一(yi)個環境(jing)中正確的(de)(de)(de)顯(xian)(xian)示(shi)(shi)信息,要有(you)足夠的(de)(de)(de)亮(liang)(liang)度(du)(du)以圖像的(de)(de)(de)實際對(dui)比度(du)(du),尤(you)其(qi)是用(yong)(yong)在戶外環境(jing)條(tiao)件惡劣的(de)(de)(de)戶外LED顯(xian)(xian)示(shi)(shi)屏。所(suo)以,根(gen)據(ju)使用(yong)(yong)環境(jing)的(de)(de)(de)不同顯(xian)(xian)示(shi)(shi)屏要有(you)相應(ying)的(de)(de)(de)亮(liang)(liang)度(du)(du)來。顯(xian)(xian)示(shi)(shi)屏投入使用(yong)(yong)后,做(zuo)為發光(guang)源的(de)(de)(de)LED管的(de)(de)(de)亮(liang)(liang)度(du)(du)就(jiu)開始(shi)衰(shuai)減,所(suo)以亮(liang)(liang)度(du)(du)衰(shuai)減的(de)(de)(de)速率是LED顯(xian)(xian)示(shi)(shi)屏的(de)(de)(de)重要性(xing)能之(zhi)一(yi)。
場(chang)(chang)(chang)(chang)掃(sao)描電(dian)(dian)路:包括場(chang)(chang)(chang)(chang)振蕩和場(chang)(chang)(chang)(chang)輸出(chu)兩部分。場(chang)(chang)(chang)(chang)振蕩電(dian)(dian)路在同步(bu)信號下(xia)(xia),形(xing)(xing)成(cheng)場(chang)(chang)(chang)(chang)頻鋸齒波,鋸齒波再由(you)場(chang)(chang)(chang)(chang)輸出(chu)電(dian)(dian)路功(gong)率放大后加至(zhi)場(chang)(chang)(chang)(chang)偏轉線(xian)圈,形(xing)(xing)成(cheng)掃(sao)描電(dian)(dian)流(liu),使電(dian)(dian)子槍發(fa)射出(chu)的電(dian)(dian)子上下(xia)(xia)拉開。場(chang)(chang)(chang)(chang)幅和場(chang)(chang)(chang)(chang)中心調節(jie)的功(gong)能也是在場(chang)(chang)(chang)(chang)掃(sao)描電(dian)(dian)路中實(shi)現的,此外還輸出(chu)場(chang)(chang)(chang)(chang)頻鋸齒波到枕形(xing)(xing)校正電(dian)(dian)路,以(yi)校正水平枕形(xing)(xing)失真。
LCD顯(xian)(xian)示(shi)(shi)器即(ji)液(ye)晶顯(xian)(xian)示(shi)(shi)器。它(ta)的(de)(de)優點有機身薄、占(zhan)地(di)小和(he)輻射(she)小。LCD顯(xian)(xian)示(shi)(shi)器內部有很多液(ye)晶粒子,它(ta)們(men)有規律地(di)排(pai)列成(cheng)一(yi)(yi)定的(de)(de)形狀,并且它(ta)們(men)每一(yi)(yi)面的(de)(de)顏色(se)(se)(se)都不同(tong),分為(wei)紅色(se)(se)(se)、綠(lv)色(se)(se)(se)和(he)藍(lan)色(se)(se)(se)。這三原色(se)(se)(se)能還(huan)原成(cheng)任意的(de)(de)其他(ta)顏色(se)(se)(se)。當(dang)顯(xian)(xian)示(shi)(shi)器收到顯(xian)(xian)示(shi)(shi)數據(ju)時,會控制每個液(ye)晶粒子轉動到不同(tong)顏色(se)(se)(se)的(de)(de)面,從而組合成(cheng)不同(tong)的(de)(de)顏色(se)(se)(se)和(he)圖像。也因(yin)為(wei)這樣,LCD顯(xian)(xian)示(shi)(shi)器的(de)(de)缺點有色(se)(se)(se)彩(cai)不夠艷和(he)可視角度(du)不大等。
LED顯示(shi)器(qi)集微(wei)電子(zi)技(ji)術、計算(suan)機(ji)技(ji)術、信(xin)息(xi)處(chu)理技(ji)術于一體(ti),以其色彩鮮艷、動(dong)態范圍廣、亮(liang)度高、壽(shou)命(ming)長、工作(zuo)穩(wen)定可靠等優點,成為具優勢的新(xin)一代顯示(shi)設備。目前(qian),LED顯示(shi)器(qi)已(yi)廣泛應(ying)用于大(da)型(xing)廣場、體(ti)育場館、證券交易大(da)廳等場所,可以滿足(zu)不同環境的需要。
一(yi)般濕(shi)(shi)度保持在30%-80%之間(jian)(jian),顯(xian)(xian)示器(qi)都能正常工作(zuo),但一(yi)旦室(shi)內(nei)濕(shi)(shi)度高于80%后,顯(xian)(xian)示器(qi)內(nei)部就(jiu)會產(chan)(chan)(chan)生(sheng)結露現(xian)象。其內(nei)部的(de)(de)電源變壓(ya)器(qi)和其他線圈受潮后也易(yi)產(chan)(chan)(chan)生(sheng)漏電,甚至有(you)可(ke)能造成連線短(duan)路;而顯(xian)(xian)示器(qi)的(de)(de)高壓(ya)部位則極易(yi)產(chan)(chan)(chan)生(sheng)放電現(xian)象;機內(nei)元器(qi)件容易(yi)生(sheng)銹、腐(fu)蝕,嚴重時(shi)會使電路板發生(sheng)短(duan)路。因此,LCD顯(xian)(xian)示器(qi)注意防潮,長時(shi)間(jian)(jian)不用的(de)(de)顯(xian)(xian)示器(qi),可(ke)以定期通電工作(zuo)一(yi)段時(shi)間(jian)(jian),讓顯(xian)(xian)示器(qi)工作(zuo)時(shi)產(chan)(chan)(chan)生(sheng)的(de)(de)熱量(liang)將機內(nei)的(de)(de)潮氣(qi)驅趕出去。
花(hua)屏通常是由于(yu)顯(xian)(xian)(xian)(xian)(xian)示器(qi)不支持主機送來的顯(xian)(xian)(xian)(xian)(xian)示模(mo)式(shi)(shi),往往是高于(yu)顯(xian)(xian)(xian)(xian)(xian)示器(qi)的顯(xian)(xian)(xian)(xian)(xian)示模(mo)式(shi)(shi),引(yin)起屏幕的圖(tu)像(xiang)混(hun)亂,無法看清楚屏幕上的圖(tu)像(xiang)和(he)文字。如果是具有(you)模(mo)式(shi)(shi)自動(dong)(dong)識別的顯(xian)(xian)(xian)(xian)(xian)示器(qi),有(you)可能是黑屏狀態,但(dan)這(zhe)時面板下方指示燈為(wei)綠色。這(zhe)時重新啟動(dong)(dong)即可恢復。如果這(zhe)種方法不行,可以(yi)在把顯(xian)(xian)(xian)(xian)(xian)卡(ka)驅(qu)動(dong)(dong)程序刪除,然后在重新安裝顯(xian)(xian)(xian)(xian)(xian)卡(ka)驅(qu)動(dong)(dong)即可。還有(you)在顯(xian)(xian)(xian)(xian)(xian)卡(ka)顯(xian)(xian)(xian)(xian)(xian)存(cun)發(fa)生故障時會出現屏幕上固(gu)定位置顯(xian)(xian)(xian)(xian)(xian)示混(hun)亂,而(er)其他地方卻顯(xian)(xian)(xian)(xian)(xian)示正常。也有(you)顯(xian)(xian)(xian)(xian)(xian)卡(ka)損壞造(zao)成(cheng)花(hua)屏的。