顯(xian)(xian)示(shi)(shi)(shi)屏(ping)的(de)(de)亮(liang)度(du):要在(zai)一個環(huan)境中正確的(de)(de)顯(xian)(xian)示(shi)(shi)(shi)信息,要有足夠的(de)(de)亮(liang)度(du)以(yi)圖像(xiang)的(de)(de)實(shi)際對比度(du),尤其是用在(zai)戶(hu)外(wai)環(huan)境條(tiao)件(jian)惡劣的(de)(de)戶(hu)外(wai)LED顯(xian)(xian)示(shi)(shi)(shi)屏(ping)。所(suo)以(yi),根據使(shi)用環(huan)境的(de)(de)不同顯(xian)(xian)示(shi)(shi)(shi)屏(ping)要有相(xiang)應的(de)(de)亮(liang)度(du)來。顯(xian)(xian)示(shi)(shi)(shi)屏(ping)投入使(shi)用后,做為發光源的(de)(de)LED管的(de)(de)亮(liang)度(du)就開始(shi)衰(shuai)減,所(suo)以(yi)亮(liang)度(du)衰(shuai)減的(de)(de)速(su)率是LED顯(xian)(xian)示(shi)(shi)(shi)屏(ping)的(de)(de)重要性能之一。
場(chang)(chang)(chang)掃(sao)(sao)描(miao)(miao)電(dian)路(lu)(lu)(lu):包(bao)括場(chang)(chang)(chang)振蕩和(he)(he)場(chang)(chang)(chang)輸出(chu)兩部(bu)分。場(chang)(chang)(chang)振蕩電(dian)路(lu)(lu)(lu)在(zai)同步信號下(xia),形(xing)成場(chang)(chang)(chang)頻鋸齒(chi)波(bo)(bo),鋸齒(chi)波(bo)(bo)再由(you)場(chang)(chang)(chang)輸出(chu)電(dian)路(lu)(lu)(lu)功率放大(da)后加至場(chang)(chang)(chang)偏(pian)轉線圈,形(xing)成掃(sao)(sao)描(miao)(miao)電(dian)流,使電(dian)子槍(qiang)發射出(chu)的(de)電(dian)子上下(xia)拉開。場(chang)(chang)(chang)幅和(he)(he)場(chang)(chang)(chang)中心(xin)調節(jie)的(de)功能也是在(zai)場(chang)(chang)(chang)掃(sao)(sao)描(miao)(miao)電(dian)路(lu)(lu)(lu)中實(shi)現的(de),此外(wai)還輸出(chu)場(chang)(chang)(chang)頻鋸齒(chi)波(bo)(bo)到(dao)枕形(xing)校(xiao)正(zheng)電(dian)路(lu)(lu)(lu),以校(xiao)正(zheng)水平枕形(xing)失真。
LCD顯(xian)示器(qi)即液(ye)(ye)(ye)晶顯(xian)示器(qi)。它(ta)的(de)優點有(you)(you)(you)(you)機身薄、占(zhan)地小和輻(fu)射小。LCD顯(xian)示器(qi)內部有(you)(you)(you)(you)很多液(ye)(ye)(ye)晶粒(li)子(zi),它(ta)們有(you)(you)(you)(you)規律地排(pai)列成一(yi)定的(de)形狀(zhuang),并且它(ta)們每一(yi)面的(de)顏(yan)色都不(bu)同(tong),分為紅色、綠色和藍色。這(zhe)三原(yuan)色能還原(yuan)成任意的(de)其他顏(yan)色。當(dang)顯(xian)示器(qi)收到(dao)顯(xian)示數據時,會(hui)控制(zhi)每個液(ye)(ye)(ye)晶粒(li)子(zi)轉動(dong)到(dao)不(bu)同(tong)顏(yan)色的(de)面,從(cong)而組合成不(bu)同(tong)的(de)顏(yan)色和圖像。也(ye)因為這(zhe)樣,LCD顯(xian)示器(qi)的(de)缺(que)點有(you)(you)(you)(you)色彩不(bu)夠艷和可視(shi)角(jiao)度不(bu)大等。
LED顯示(shi)器集(ji)微電子技(ji)術(shu)、計算機技(ji)術(shu)、信息處理技(ji)術(shu)于一(yi)體(ti),以其色彩鮮艷、動態范圍廣、亮(liang)度高(gao)、壽命長、工作穩(wen)定可靠等優(you)點(dian),成為具優(you)勢的(de)新一(yi)代顯示(shi)設備。目前,LED顯示(shi)器已廣泛應(ying)用于大(da)型廣場、體(ti)育場館、證券交(jiao)易大(da)廳等場所,可以滿足不同環境的(de)需要。
一般濕(shi)度(du)保(bao)持(chi)在30%-80%之(zhi)間(jian),顯示(shi)器(qi)(qi)都能正常工作(zuo),但(dan)一旦室(shi)內(nei)濕(shi)度(du)高(gao)于(yu)80%后(hou),顯示(shi)器(qi)(qi)內(nei)部(bu)(bu)就會(hui)產(chan)生(sheng)(sheng)結(jie)露(lu)現(xian)象(xiang)。其(qi)(qi)內(nei)部(bu)(bu)的電源變壓器(qi)(qi)和其(qi)(qi)他線圈(quan)受潮后(hou)也易(yi)產(chan)生(sheng)(sheng)漏電,甚至有可(ke)能造(zao)成連線短路(lu);而顯示(shi)器(qi)(qi)的高(gao)壓部(bu)(bu)位則極易(yi)產(chan)生(sheng)(sheng)放(fang)電現(xian)象(xiang);機內(nei)元(yuan)器(qi)(qi)件容易(yi)生(sheng)(sheng)銹、腐(fu)蝕,嚴重時(shi)(shi)會(hui)使電路(lu)板發生(sheng)(sheng)短路(lu)。因此,LCD顯示(shi)器(qi)(qi)注意防潮,長時(shi)(shi)間(jian)不(bu)用的顯示(shi)器(qi)(qi),可(ke)以(yi)定(ding)期通電工作(zuo)一段時(shi)(shi)間(jian),讓顯示(shi)器(qi)(qi)工作(zuo)時(shi)(shi)產(chan)生(sheng)(sheng)的熱量將機內(nei)的潮氣驅趕出去。
花屏(ping)(ping)(ping)通常是(shi)(shi)由于(yu)顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)器不支持主機送來的顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)模式,往往是(shi)(shi)高于(yu)顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)器的顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)模式,引起屏(ping)(ping)(ping)幕的圖(tu)像(xiang)混(hun)亂,無法(fa)看清楚屏(ping)(ping)(ping)幕上(shang)的圖(tu)像(xiang)和文字。如果是(shi)(shi)具有模式自動(dong)識別的顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)器,有可能是(shi)(shi)黑(hei)屏(ping)(ping)(ping)狀態,但這時面板下方指(zhi)示(shi)(shi)(shi)燈(deng)為綠色。這時重新(xin)啟動(dong)即可恢復。如果這種方法(fa)不行,可以在(zai)把(ba)顯(xian)(xian)(xian)(xian)卡驅(qu)動(dong)程序刪除,然后在(zai)重新(xin)安裝顯(xian)(xian)(xian)(xian)卡驅(qu)動(dong)即可。還有在(zai)顯(xian)(xian)(xian)(xian)卡顯(xian)(xian)(xian)(xian)存發生(sheng)故障時會出(chu)現屏(ping)(ping)(ping)幕上(shang)固定位置顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)混(hun)亂,而其(qi)他地方卻顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)正常。也有顯(xian)(xian)(xian)(xian)卡損壞造成花屏(ping)(ping)(ping)的。