顯(xian)(xian)示(shi)(shi)屏(ping)的亮(liang)(liang)度(du)(du):要(yao)(yao)在一個環境(jing)中正確(que)的顯(xian)(xian)示(shi)(shi)信息,要(yao)(yao)有足夠的亮(liang)(liang)度(du)(du)以圖像(xiang)的實際(ji)對比度(du)(du),尤其(qi)是用(yong)在戶外環境(jing)條件惡劣(lie)的戶外LED顯(xian)(xian)示(shi)(shi)屏(ping)。所以,根(gen)據使(shi)用(yong)環境(jing)的不同顯(xian)(xian)示(shi)(shi)屏(ping)要(yao)(yao)有相應的亮(liang)(liang)度(du)(du)來。顯(xian)(xian)示(shi)(shi)屏(ping)投(tou)入使(shi)用(yong)后(hou),做為發光源的LED管的亮(liang)(liang)度(du)(du)就(jiu)開始衰減,所以亮(liang)(liang)度(du)(du)衰減的速率是LED顯(xian)(xian)示(shi)(shi)屏(ping)的重要(yao)(yao)性能之一。
場(chang)(chang)(chang)掃描(miao)電(dian)(dian)(dian)路(lu):包括(kuo)場(chang)(chang)(chang)振蕩(dang)和(he)場(chang)(chang)(chang)輸出兩部(bu)分。場(chang)(chang)(chang)振蕩(dang)電(dian)(dian)(dian)路(lu)在同(tong)步信號下(xia),形成(cheng)(cheng)場(chang)(chang)(chang)頻鋸齒波,鋸齒波再由場(chang)(chang)(chang)輸出電(dian)(dian)(dian)路(lu)功(gong)率放大后加至場(chang)(chang)(chang)偏轉線圈(quan),形成(cheng)(cheng)掃描(miao)電(dian)(dian)(dian)流,使電(dian)(dian)(dian)子槍發射出的(de)電(dian)(dian)(dian)子上(shang)下(xia)拉開。場(chang)(chang)(chang)幅和(he)場(chang)(chang)(chang)中心(xin)調(diao)節的(de)功(gong)能也是在場(chang)(chang)(chang)掃描(miao)電(dian)(dian)(dian)路(lu)中實現的(de),此外還輸出場(chang)(chang)(chang)頻鋸齒波到枕形校正電(dian)(dian)(dian)路(lu),以校正水平枕形失真(zhen)。
LCD顯(xian)示(shi)(shi)(shi)(shi)器即液晶(jing)顯(xian)示(shi)(shi)(shi)(shi)器。它(ta)的優點有(you)(you)機(ji)身薄(bo)、占(zhan)地(di)小(xiao)和(he)輻射(she)小(xiao)。LCD顯(xian)示(shi)(shi)(shi)(shi)器內部有(you)(you)很多液晶(jing)粒(li)子(zi),它(ta)們有(you)(you)規律(lv)地(di)排(pai)列成(cheng)(cheng)一定(ding)的形狀,并且(qie)它(ta)們每(mei)一面(mian)(mian)的顏(yan)色(se)(se)都不(bu)(bu)同,分為紅色(se)(se)、綠色(se)(se)和(he)藍色(se)(se)。這(zhe)三(san)原(yuan)(yuan)色(se)(se)能還原(yuan)(yuan)成(cheng)(cheng)任意的其他顏(yan)色(se)(se)。當顯(xian)示(shi)(shi)(shi)(shi)器收到顯(xian)示(shi)(shi)(shi)(shi)數據時,會控制每(mei)個液晶(jing)粒(li)子(zi)轉動到不(bu)(bu)同顏(yan)色(se)(se)的面(mian)(mian),從而組(zu)合成(cheng)(cheng)不(bu)(bu)同的顏(yan)色(se)(se)和(he)圖像。也因為這(zhe)樣(yang),LCD顯(xian)示(shi)(shi)(shi)(shi)器的缺點有(you)(you)色(se)(se)彩不(bu)(bu)夠艷和(he)可視角度(du)不(bu)(bu)大等(deng)。
LED顯(xian)示(shi)器集微電子技術(shu)、計算(suan)機技術(shu)、信(xin)息處理技術(shu)于(yu)(yu)一(yi)體,以其色(se)彩(cai)鮮(xian)艷、動(dong)態(tai)范圍廣、亮度高、壽(shou)命(ming)長、工作穩定可靠(kao)等優點,成為具(ju)優勢的新一(yi)代顯(xian)示(shi)設備。目前(qian),LED顯(xian)示(shi)器已廣泛(fan)應用于(yu)(yu)大(da)型廣場、體育場館、證券交易大(da)廳等場所,可以滿足不同環境(jing)的需(xu)要。
一(yi)(yi)般濕度(du)保持在30%-80%之間,顯(xian)示(shi)器(qi)(qi)都能正常工作(zuo),但一(yi)(yi)旦室內(nei)濕度(du)高于80%后(hou),顯(xian)示(shi)器(qi)(qi)內(nei)部就會產(chan)(chan)生結露(lu)現(xian)象。其(qi)(qi)內(nei)部的電(dian)源變壓器(qi)(qi)和其(qi)(qi)他線(xian)圈受(shou)潮后(hou)也易(yi)產(chan)(chan)生漏電(dian),甚至有可能造(zao)成連線(xian)短(duan)路(lu);而顯(xian)示(shi)器(qi)(qi)的高壓部位(wei)則(ze)極易(yi)產(chan)(chan)生放(fang)電(dian)現(xian)象;機內(nei)元器(qi)(qi)件(jian)容易(yi)生銹、腐蝕(shi),嚴(yan)重時會使電(dian)路(lu)板發(fa)生短(duan)路(lu)。因(yin)此(ci),LCD顯(xian)示(shi)器(qi)(qi)注意防(fang)潮,長時間不(bu)用的顯(xian)示(shi)器(qi)(qi),可以定期通電(dian)工作(zuo)一(yi)(yi)段時間,讓顯(xian)示(shi)器(qi)(qi)工作(zuo)時產(chan)(chan)生的熱量將機內(nei)的潮氣驅趕出去。
花(hua)(hua)屏(ping)通(tong)常是(shi)由(you)于顯(xian)(xian)示(shi)(shi)器不(bu)支持主機(ji)送來的(de)顯(xian)(xian)示(shi)(shi)模(mo)式,往(wang)往(wang)是(shi)高(gao)于顯(xian)(xian)示(shi)(shi)器的(de)顯(xian)(xian)示(shi)(shi)模(mo)式,引起屏(ping)幕(mu)(mu)的(de)圖像混亂(luan),無法看清楚屏(ping)幕(mu)(mu)上(shang)的(de)圖像和文字。如(ru)果是(shi)具(ju)有(you)模(mo)式自動(dong)識別的(de)顯(xian)(xian)示(shi)(shi)器,有(you)可(ke)能(neng)是(shi)黑屏(ping)狀(zhuang)態,但這時面板下方(fang)指示(shi)(shi)燈為綠色(se)。這時重(zhong)新啟動(dong)即可(ke)恢復。如(ru)果這種方(fang)法不(bu)行,可(ke)以在把顯(xian)(xian)卡(ka)驅(qu)(qu)動(dong)程序刪(shan)除(chu),然后在重(zhong)新安裝顯(xian)(xian)卡(ka)驅(qu)(qu)動(dong)即可(ke)。還有(you)在顯(xian)(xian)卡(ka)顯(xian)(xian)存(cun)發生故障時會出現屏(ping)幕(mu)(mu)上(shang)固定位(wei)置顯(xian)(xian)示(shi)(shi)混亂(luan),而(er)其他(ta)地方(fang)卻顯(xian)(xian)示(shi)(shi)正常。也有(you)顯(xian)(xian)卡(ka)損(sun)壞造成花(hua)(hua)屏(ping)的(de)。