顯(xian)(xian)示屏的(de)(de)亮(liang)度(du)(du):要在一個(ge)環境中正確的(de)(de)顯(xian)(xian)示信息,要有足夠的(de)(de)亮(liang)度(du)(du)以(yi)圖(tu)像的(de)(de)實(shi)際對比度(du)(du),尤(you)其(qi)是(shi)(shi)用在戶外(wai)(wai)環境條(tiao)件惡(e)劣的(de)(de)戶外(wai)(wai)LED顯(xian)(xian)示屏。所以(yi),根(gen)據使(shi)用環境的(de)(de)不同顯(xian)(xian)示屏要有相應的(de)(de)亮(liang)度(du)(du)來。顯(xian)(xian)示屏投入(ru)使(shi)用后(hou),做為發光源的(de)(de)LED管(guan)的(de)(de)亮(liang)度(du)(du)就開始衰減,所以(yi)亮(liang)度(du)(du)衰減的(de)(de)速率(lv)是(shi)(shi)LED顯(xian)(xian)示屏的(de)(de)重要性能之一。
場(chang)(chang)(chang)掃描電(dian)(dian)(dian)路(lu)(lu):包(bao)括場(chang)(chang)(chang)振(zhen)蕩(dang)和(he)場(chang)(chang)(chang)輸出(chu)兩部分。場(chang)(chang)(chang)振(zhen)蕩(dang)電(dian)(dian)(dian)路(lu)(lu)在同步(bu)信(xin)號下,形成場(chang)(chang)(chang)頻(pin)鋸齒(chi)波(bo),鋸齒(chi)波(bo)再由(you)場(chang)(chang)(chang)輸出(chu)電(dian)(dian)(dian)路(lu)(lu)功率放大后加至(zhi)場(chang)(chang)(chang)偏轉線圈,形成掃描電(dian)(dian)(dian)流,使電(dian)(dian)(dian)子(zi)槍發射出(chu)的(de)電(dian)(dian)(dian)子(zi)上(shang)下拉開(kai)。場(chang)(chang)(chang)幅和(he)場(chang)(chang)(chang)中(zhong)心調節的(de)功能也是在場(chang)(chang)(chang)掃描電(dian)(dian)(dian)路(lu)(lu)中(zhong)實現的(de),此(ci)外還輸出(chu)場(chang)(chang)(chang)頻(pin)鋸齒(chi)波(bo)到枕(zhen)形校正電(dian)(dian)(dian)路(lu)(lu),以(yi)校正水(shui)平枕(zhen)形失(shi)真(zhen)。
LCD顯(xian)示(shi)器即液(ye)晶(jing)顯(xian)示(shi)器。它(ta)的(de)優(you)點(dian)有(you)(you)機(ji)身(shen)薄、占地小和輻射小。LCD顯(xian)示(shi)器內部有(you)(you)很多液(ye)晶(jing)粒(li)子(zi),它(ta)們(men)有(you)(you)規律地排列成(cheng)一定的(de)形狀,并且它(ta)們(men)每一面的(de)顏色(se)(se)都不(bu)(bu)同(tong)(tong)(tong),分為紅(hong)色(se)(se)、綠色(se)(se)和藍色(se)(se)。這(zhe)(zhe)三(san)原(yuan)色(se)(se)能還原(yuan)成(cheng)任意的(de)其他顏色(se)(se)。當(dang)顯(xian)示(shi)器收到顯(xian)示(shi)數據時,會控制每個液(ye)晶(jing)粒(li)子(zi)轉動到不(bu)(bu)同(tong)(tong)(tong)顏色(se)(se)的(de)面,從而組合成(cheng)不(bu)(bu)同(tong)(tong)(tong)的(de)顏色(se)(se)和圖像。也因為這(zhe)(zhe)樣,LCD顯(xian)示(shi)器的(de)缺點(dian)有(you)(you)色(se)(se)彩不(bu)(bu)夠艷和可(ke)視角度不(bu)(bu)大等。
LED顯(xian)示(shi)器集微電子技(ji)術、計算機技(ji)術、信息處理技(ji)術于(yu)一(yi)體,以其色彩鮮艷、動態(tai)范圍(wei)廣(guang)、亮度(du)高、壽命長、工作(zuo)穩定(ding)可靠等優(you)點,成為具優(you)勢的新(xin)一(yi)代顯(xian)示(shi)設備(bei)。目前,LED顯(xian)示(shi)器已廣(guang)泛應用于(yu)大型廣(guang)場、體育場館、證券交易大廳等場所,可以滿足(zu)不同環境的需(xu)要。
一般(ban)濕度(du)保持在30%-80%之間(jian),顯(xian)示(shi)器(qi)都能正常工(gong)(gong)作,但一旦(dan)室內濕度(du)高于80%后,顯(xian)示(shi)器(qi)內部就會產生(sheng)(sheng)結露(lu)現象(xiang)。其(qi)內部的電源變壓(ya)器(qi)和其(qi)他線圈受潮(chao)后也易產生(sheng)(sheng)漏電,甚(shen)至有(you)可能造成(cheng)連線短路;而(er)顯(xian)示(shi)器(qi)的高壓(ya)部位(wei)則(ze)極易產生(sheng)(sheng)放電現象(xiang);機內元(yuan)器(qi)件容易生(sheng)(sheng)銹、腐蝕,嚴重時(shi)會使電路板發(fa)生(sheng)(sheng)短路。因此,LCD顯(xian)示(shi)器(qi)注意防潮(chao),長時(shi)間(jian)不用的顯(xian)示(shi)器(qi),可以定期通電工(gong)(gong)作一段時(shi)間(jian),讓顯(xian)示(shi)器(qi)工(gong)(gong)作時(shi)產生(sheng)(sheng)的熱量將(jiang)機內的潮(chao)氣驅趕出去。
花屏(ping)通(tong)常(chang)是由(you)于顯(xian)(xian)(xian)(xian)示(shi)器(qi)(qi)不支(zhi)持主機送來的顯(xian)(xian)(xian)(xian)示(shi)模(mo)式(shi),往往是高(gao)于顯(xian)(xian)(xian)(xian)示(shi)器(qi)(qi)的顯(xian)(xian)(xian)(xian)示(shi)模(mo)式(shi),引起屏(ping)幕(mu)(mu)的圖(tu)像(xiang)混亂(luan),無法看清楚(chu)屏(ping)幕(mu)(mu)上(shang)的圖(tu)像(xiang)和(he)文字。如(ru)果(guo)是具有(you)模(mo)式(shi)自動(dong)識別(bie)的顯(xian)(xian)(xian)(xian)示(shi)器(qi)(qi),有(you)可能是黑屏(ping)狀態(tai),但這時面板下方(fang)指示(shi)燈為(wei)綠色。這時重新啟動(dong)即可恢(hui)復(fu)。如(ru)果(guo)這種(zhong)方(fang)法不行,可以在把顯(xian)(xian)(xian)(xian)卡驅動(dong)程序(xu)刪除,然(ran)后在重新安裝(zhuang)顯(xian)(xian)(xian)(xian)卡驅動(dong)即可。還有(you)在顯(xian)(xian)(xian)(xian)卡顯(xian)(xian)(xian)(xian)存發生故障時會(hui)出(chu)現屏(ping)幕(mu)(mu)上(shang)固定位置顯(xian)(xian)(xian)(xian)示(shi)混亂(luan),而其他地方(fang)卻顯(xian)(xian)(xian)(xian)示(shi)正(zheng)常(chang)。也有(you)顯(xian)(xian)(xian)(xian)卡損壞造成(cheng)花屏(ping)的。