顯(xian)(xian)示(shi)屏(ping)(ping)的(de)(de)亮(liang)(liang)度(du)(du)(du):要(yao)在(zai)(zai)一個環境(jing)中正確的(de)(de)顯(xian)(xian)示(shi)信息,要(yao)有足夠的(de)(de)亮(liang)(liang)度(du)(du)(du)以(yi)圖像的(de)(de)實際對比度(du)(du)(du),尤其是(shi)用(yong)在(zai)(zai)戶(hu)外環境(jing)條件惡劣的(de)(de)戶(hu)外LED顯(xian)(xian)示(shi)屏(ping)(ping)。所以(yi),根據使(shi)用(yong)環境(jing)的(de)(de)不(bu)同顯(xian)(xian)示(shi)屏(ping)(ping)要(yao)有相應的(de)(de)亮(liang)(liang)度(du)(du)(du)來。顯(xian)(xian)示(shi)屏(ping)(ping)投(tou)入(ru)使(shi)用(yong)后,做為發(fa)光源的(de)(de)LED管的(de)(de)亮(liang)(liang)度(du)(du)(du)就開始衰(shuai)減,所以(yi)亮(liang)(liang)度(du)(du)(du)衰(shuai)減的(de)(de)速(su)率是(shi)LED顯(xian)(xian)示(shi)屏(ping)(ping)的(de)(de)重(zhong)要(yao)性能之一。
場(chang)掃(sao)描電(dian)(dian)(dian)路:包括場(chang)振蕩和場(chang)輸(shu)出兩部分。場(chang)振蕩電(dian)(dian)(dian)路在同步信(xin)號下(xia),形(xing)成(cheng)場(chang)頻(pin)鋸(ju)齒波,鋸(ju)齒波再由場(chang)輸(shu)出電(dian)(dian)(dian)路功(gong)(gong)率(lv)放大后加至場(chang)偏(pian)轉線圈,形(xing)成(cheng)掃(sao)描電(dian)(dian)(dian)流,使電(dian)(dian)(dian)子槍發(fa)射出的(de)(de)電(dian)(dian)(dian)子上下(xia)拉開。場(chang)幅和場(chang)中心(xin)調節的(de)(de)功(gong)(gong)能也是(shi)在場(chang)掃(sao)描電(dian)(dian)(dian)路中實現的(de)(de),此外還輸(shu)出場(chang)頻(pin)鋸(ju)齒波到(dao)枕(zhen)(zhen)形(xing)校(xiao)正電(dian)(dian)(dian)路,以校(xiao)正水平(ping)枕(zhen)(zhen)形(xing)失真。
LCD顯(xian)(xian)示器(qi)(qi)(qi)即液晶顯(xian)(xian)示器(qi)(qi)(qi)。它的(de)優點(dian)(dian)有機身薄、占地(di)小(xiao)和輻射小(xiao)。LCD顯(xian)(xian)示器(qi)(qi)(qi)內部有很多液晶粒(li)子,它們有規律地(di)排列成(cheng)(cheng)一定的(de)形狀,并且(qie)它們每(mei)一面(mian)的(de)顏色(se)(se)都不同(tong)(tong),分(fen)為紅色(se)(se)、綠(lv)色(se)(se)和藍色(se)(se)。這三原(yuan)(yuan)色(se)(se)能(neng)還(huan)原(yuan)(yuan)成(cheng)(cheng)任意的(de)其他顏色(se)(se)。當顯(xian)(xian)示器(qi)(qi)(qi)收到(dao)顯(xian)(xian)示數據時(shi),會控(kong)制每(mei)個(ge)液晶粒(li)子轉動到(dao)不同(tong)(tong)顏色(se)(se)的(de)面(mian),從而組合成(cheng)(cheng)不同(tong)(tong)的(de)顏色(se)(se)和圖像(xiang)。也(ye)因為這樣,LCD顯(xian)(xian)示器(qi)(qi)(qi)的(de)缺點(dian)(dian)有色(se)(se)彩不夠艷和可視角度(du)不大等。
LED顯示器(qi)集微電子技術(shu)、計算機技術(shu)、信息處理技術(shu)于一(yi)體(ti),以其色彩鮮艷、動(dong)態范(fan)圍廣(guang)、亮度(du)高、壽命長、工作穩定可靠等優(you)點,成為具優(you)勢(shi)的新一(yi)代顯示設備。目前(qian),LED顯示器(qi)已廣(guang)泛應用于大型廣(guang)場、體(ti)育場館、證券交易大廳等場所(suo),可以滿足(zu)不同(tong)環境的需要。
一(yi)般濕(shi)度保持在30%-80%之間,顯示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)都能正常工作(zuo),但一(yi)旦室(shi)內(nei)濕(shi)度高于80%后,顯示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)內(nei)部就會產生結露現象(xiang)。其(qi)(qi)內(nei)部的(de)(de)電(dian)源變壓器(qi)(qi)(qi)(qi)和其(qi)(qi)他(ta)線(xian)圈(quan)受潮后也易產生漏電(dian),甚(shen)至有可能造成連線(xian)短(duan)(duan)路(lu);而顯示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)的(de)(de)高壓部位則(ze)極(ji)易產生放電(dian)現象(xiang);機(ji)(ji)內(nei)元(yuan)器(qi)(qi)(qi)(qi)件容易生銹、腐(fu)蝕,嚴重時(shi)會使電(dian)路(lu)板發(fa)生短(duan)(duan)路(lu)。因(yin)此,LCD顯示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)注意防(fang)潮,長時(shi)間不用的(de)(de)顯示(shi)(shi)(shi)器(qi)(qi)(qi)(qi),可以定期通電(dian)工作(zuo)一(yi)段時(shi)間,讓顯示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)工作(zuo)時(shi)產生的(de)(de)熱量將機(ji)(ji)內(nei)的(de)(de)潮氣(qi)驅趕出去。
花屏(ping)通(tong)常是(shi)由于顯(xian)(xian)(xian)示(shi)(shi)器不支(zhi)持主機送(song)來的(de)(de)顯(xian)(xian)(xian)示(shi)(shi)模(mo)式(shi),往往是(shi)高(gao)于顯(xian)(xian)(xian)示(shi)(shi)器的(de)(de)顯(xian)(xian)(xian)示(shi)(shi)模(mo)式(shi),引起屏(ping)幕的(de)(de)圖(tu)像混亂,無法看清(qing)楚屏(ping)幕上(shang)的(de)(de)圖(tu)像和文字。如果(guo)(guo)是(shi)具有(you)(you)模(mo)式(shi)自動識別的(de)(de)顯(xian)(xian)(xian)示(shi)(shi)器,有(you)(you)可能(neng)是(shi)黑屏(ping)狀態(tai),但(dan)這時(shi)面(mian)板下(xia)方指示(shi)(shi)燈為綠色。這時(shi)重(zhong)新啟動即可恢復。如果(guo)(guo)這種方法不行,可以(yi)在(zai)(zai)把顯(xian)(xian)(xian)卡驅(qu)動程(cheng)序刪(shan)除,然后(hou)在(zai)(zai)重(zhong)新安裝(zhuang)顯(xian)(xian)(xian)卡驅(qu)動即可。還有(you)(you)在(zai)(zai)顯(xian)(xian)(xian)卡顯(xian)(xian)(xian)存(cun)發生故(gu)障時(shi)會出(chu)現屏(ping)幕上(shang)固定位置顯(xian)(xian)(xian)示(shi)(shi)混亂,而其他地方卻顯(xian)(xian)(xian)示(shi)(shi)正常。也有(you)(you)顯(xian)(xian)(xian)卡損壞造成花屏(ping)的(de)(de)。