顯(xian)示屏的亮(liang)度(du)(du):要在一個環境中正(zheng)確的顯(xian)示信息(xi),要有(you)足夠的亮(liang)度(du)(du)以圖(tu)像的實際對比度(du)(du),尤其是用(yong)(yong)在戶外環境條件惡劣的戶外LED顯(xian)示屏。所以,根據(ju)使用(yong)(yong)環境的不同顯(xian)示屏要有(you)相應的亮(liang)度(du)(du)來。顯(xian)示屏投入使用(yong)(yong)后,做為發光源的LED管的亮(liang)度(du)(du)就開始衰(shuai)減,所以亮(liang)度(du)(du)衰(shuai)減的速率是LED顯(xian)示屏的重要性能(neng)之一。
場(chang)掃(sao)描(miao)電(dian)(dian)(dian)路(lu)(lu):包括場(chang)振蕩和場(chang)輸(shu)出(chu)兩部分。場(chang)振蕩電(dian)(dian)(dian)路(lu)(lu)在同步信號下,形(xing)成(cheng)場(chang)頻(pin)鋸齒(chi)波(bo),鋸齒(chi)波(bo)再由場(chang)輸(shu)出(chu)電(dian)(dian)(dian)路(lu)(lu)功(gong)率放大后(hou)加至場(chang)偏轉線圈,形(xing)成(cheng)掃(sao)描(miao)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)上下拉開。場(chang)幅和場(chang)中心調節(jie)的(de)功(gong)能(neng)也是在場(chang)掃(sao)描(miao)電(dian)(dian)(dian)路(lu)(lu)中實現的(de),此外還輸(shu)出(chu)場(chang)頻(pin)鋸齒(chi)波(bo)到枕(zhen)形(xing)校正(zheng)電(dian)(dian)(dian)路(lu)(lu),以(yi)校正(zheng)水平枕(zhen)形(xing)失真。
LCD顯示(shi)(shi)器即液晶顯示(shi)(shi)器。它(ta)的(de)(de)優點有(you)機身(shen)薄、占(zhan)地小和(he)(he)輻射小。LCD顯示(shi)(shi)器內部有(you)很多液晶粒子,它(ta)們有(you)規律地排(pai)列成一(yi)定的(de)(de)形狀(zhuang),并且(qie)它(ta)們每一(yi)面(mian)的(de)(de)顏色(se)(se)都(dou)不(bu)同(tong),分為紅色(se)(se)、綠色(se)(se)和(he)(he)藍色(se)(se)。這三原色(se)(se)能還原成任(ren)意的(de)(de)其他顏色(se)(se)。當顯示(shi)(shi)器收(shou)到顯示(shi)(shi)數據時,會(hui)控(kong)制(zhi)每個液晶粒子轉動(dong)到不(bu)同(tong)顏色(se)(se)的(de)(de)面(mian),從而組合成不(bu)同(tong)的(de)(de)顏色(se)(se)和(he)(he)圖像。也因為這樣,LCD顯示(shi)(shi)器的(de)(de)缺(que)點有(you)色(se)(se)彩不(bu)夠艷和(he)(he)可視角度不(bu)大等。
LED顯示(shi)器集微電子(zi)技術、計算機技術、信息處(chu)理技術于(yu)一(yi)體,以(yi)其(qi)色彩鮮艷、動(dong)態范圍廣(guang)、亮度(du)高(gao)、壽(shou)命長、工作(zuo)穩定可(ke)靠等優點(dian),成為具優勢(shi)的新一(yi)代(dai)顯示(shi)設備。目前(qian),LED顯示(shi)器已廣(guang)泛(fan)應用于(yu)大型(xing)廣(guang)場(chang)、體育場(chang)館、證(zheng)券交易大廳等場(chang)所,可(ke)以(yi)滿足不同(tong)環境的需要(yao)。
一(yi)(yi)般濕(shi)(shi)度保持在(zai)30%-80%之間,顯示(shi)器都能(neng)正常工(gong)作,但一(yi)(yi)旦室內濕(shi)(shi)度高于80%后,顯示(shi)器內部(bu)就會產(chan)生(sheng)結(jie)露現(xian)象。其內部(bu)的(de)(de)(de)電源變(bian)壓器和其他線(xian)圈受潮后也易產(chan)生(sheng)漏電,甚至有可(ke)能(neng)造(zao)成連線(xian)短路;而(er)顯示(shi)器的(de)(de)(de)高壓部(bu)位則(ze)極(ji)易產(chan)生(sheng)放電現(xian)象;機內元器件容易生(sheng)銹(xiu)、腐蝕(shi),嚴重時(shi)會使(shi)電路板發生(sheng)短路。因此,LCD顯示(shi)器注意防潮,長時(shi)間不用的(de)(de)(de)顯示(shi)器,可(ke)以定期(qi)通電工(gong)作一(yi)(yi)段時(shi)間,讓顯示(shi)器工(gong)作時(shi)產(chan)生(sheng)的(de)(de)(de)熱量將機內的(de)(de)(de)潮氣驅(qu)趕出去。
花屏通(tong)常(chang)是由(you)于顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)器(qi)不支持(chi)主機送來(lai)的(de)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)模(mo)式(shi),往往是高于顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)器(qi)的(de)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)模(mo)式(shi),引起屏幕的(de)圖(tu)像混亂,無法看清楚屏幕上的(de)圖(tu)像和文字(zi)。如(ru)果(guo)是具有(you)模(mo)式(shi)自動識別(bie)的(de)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)器(qi),有(you)可(ke)(ke)能是黑屏狀態,但這時(shi)面板下方指示(shi)燈為綠色。這時(shi)重新啟動即(ji)可(ke)(ke)恢復。如(ru)果(guo)這種(zhong)方法不行,可(ke)(ke)以在把(ba)顯(xian)(xian)(xian)(xian)(xian)(xian)卡驅(qu)(qu)動程序(xu)刪除,然后在重新安裝顯(xian)(xian)(xian)(xian)(xian)(xian)卡驅(qu)(qu)動即(ji)可(ke)(ke)。還有(you)在顯(xian)(xian)(xian)(xian)(xian)(xian)卡顯(xian)(xian)(xian)(xian)(xian)(xian)存發生故(gu)障時(shi)會出現屏幕上固定位置顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)混亂,而其他地方卻顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)正常(chang)。也有(you)顯(xian)(xian)(xian)(xian)(xian)(xian)卡損壞造成花屏的(de)。