顯(xian)示(shi)屏(ping)的(de)亮(liang)度(du)(du):要(yao)在一(yi)個環境中(zhong)正(zheng)確(que)的(de)顯(xian)示(shi)信息,要(yao)有足夠的(de)亮(liang)度(du)(du)以(yi)圖像(xiang)的(de)實際對比度(du)(du),尤其是用在戶外(wai)環境條件惡劣的(de)戶外(wai)LED顯(xian)示(shi)屏(ping)。所以(yi),根據使用環境的(de)不同(tong)顯(xian)示(shi)屏(ping)要(yao)有相(xiang)應的(de)亮(liang)度(du)(du)來。顯(xian)示(shi)屏(ping)投入使用后,做為發光(guang)源的(de)LED管(guan)的(de)亮(liang)度(du)(du)就開始(shi)衰減,所以(yi)亮(liang)度(du)(du)衰減的(de)速率是LED顯(xian)示(shi)屏(ping)的(de)重(zhong)要(yao)性能之一(yi)。
場(chang)掃描電(dian)(dian)(dian)路:包括場(chang)振(zhen)蕩和場(chang)輸(shu)(shu)出兩部分(fen)。場(chang)振(zhen)蕩電(dian)(dian)(dian)路在(zai)同步信號(hao)下,形成(cheng)場(chang)頻(pin)鋸(ju)齒(chi)波(bo),鋸(ju)齒(chi)波(bo)再由場(chang)輸(shu)(shu)出電(dian)(dian)(dian)路功(gong)率放大后加至場(chang)偏轉(zhuan)線圈(quan),形成(cheng)掃描電(dian)(dian)(dian)流,使電(dian)(dian)(dian)子(zi)槍發射(she)出的電(dian)(dian)(dian)子(zi)上下拉開。場(chang)幅和場(chang)中心(xin)調(diao)節的功(gong)能也是在(zai)場(chang)掃描電(dian)(dian)(dian)路中實現(xian)的,此外還(huan)輸(shu)(shu)出場(chang)頻(pin)鋸(ju)齒(chi)波(bo)到枕形校正電(dian)(dian)(dian)路,以校正水(shui)平枕形失真。
LCD顯示(shi)器即(ji)液晶(jing)顯示(shi)器。它(ta)的(de)優點(dian)有(you)(you)機(ji)身薄、占地小(xiao)和輻射小(xiao)。LCD顯示(shi)器內部有(you)(you)很多液晶(jing)粒(li)(li)子,它(ta)們有(you)(you)規律地排(pai)列成一定(ding)的(de)形(xing)狀,并且它(ta)們每一面(mian)的(de)顏(yan)色(se)(se)(se)(se)都不同(tong),分為(wei)紅色(se)(se)(se)(se)、綠色(se)(se)(se)(se)和藍色(se)(se)(se)(se)。這(zhe)三原(yuan)色(se)(se)(se)(se)能還原(yuan)成任意的(de)其他顏(yan)色(se)(se)(se)(se)。當顯示(shi)器收到顯示(shi)數據時,會控制每個液晶(jing)粒(li)(li)子轉動到不同(tong)顏(yan)色(se)(se)(se)(se)的(de)面(mian),從而組合成不同(tong)的(de)顏(yan)色(se)(se)(se)(se)和圖(tu)像。也因為(wei)這(zhe)樣,LCD顯示(shi)器的(de)缺點(dian)有(you)(you)色(se)(se)(se)(se)彩不夠艷和可視角度不大等。
LED顯示(shi)器集微(wei)電子技(ji)術、計算機技(ji)術、信息處(chu)理技(ji)術于一(yi)體,以其(qi)色彩鮮艷、動態范圍(wei)廣、亮度高、壽命長、工作穩定可靠(kao)等優(you)點,成為具優(you)勢的(de)新一(yi)代(dai)顯示(shi)設(she)備。目前,LED顯示(shi)器已廣泛應用于大型廣場、體育場館、證(zheng)券交(jiao)易(yi)大廳等場所,可以滿足(zu)不同環(huan)境(jing)的(de)需要(yao)。
一般(ban)濕度(du)保持在(zai)30%-80%之間(jian),顯(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)都能(neng)正(zheng)常工作,但一旦室(shi)內(nei)(nei)濕度(du)高于80%后(hou),顯(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)內(nei)(nei)部(bu)就會(hui)產(chan)生(sheng)結(jie)露現(xian)象。其內(nei)(nei)部(bu)的(de)(de)(de)電(dian)(dian)源變壓器(qi)(qi)和(he)其他線(xian)圈受潮(chao)后(hou)也易(yi)產(chan)生(sheng)漏(lou)電(dian)(dian),甚至有可能(neng)造(zao)成連線(xian)短(duan)(duan)路(lu)(lu);而顯(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)的(de)(de)(de)高壓部(bu)位則極(ji)易(yi)產(chan)生(sheng)放電(dian)(dian)現(xian)象;機內(nei)(nei)元器(qi)(qi)件(jian)容易(yi)生(sheng)銹、腐(fu)蝕,嚴重時(shi)(shi)會(hui)使(shi)電(dian)(dian)路(lu)(lu)板發生(sheng)短(duan)(duan)路(lu)(lu)。因此(ci),LCD顯(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)注(zhu)意防潮(chao),長時(shi)(shi)間(jian)不用(yong)的(de)(de)(de)顯(xian)示(shi)(shi)(shi)(shi)器(qi)(qi),可以定期(qi)通電(dian)(dian)工作一段(duan)時(shi)(shi)間(jian),讓顯(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)工作時(shi)(shi)產(chan)生(sheng)的(de)(de)(de)熱量將機內(nei)(nei)的(de)(de)(de)潮(chao)氣驅趕出去。
花屏(ping)(ping)通常(chang)是(shi)由于(yu)(yu)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)器不(bu)支持主機送來的(de)(de)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)模式,往往是(shi)高于(yu)(yu)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)器的(de)(de)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)模式,引起屏(ping)(ping)幕的(de)(de)圖(tu)像(xiang)混亂,無法(fa)看(kan)清楚(chu)屏(ping)(ping)幕上的(de)(de)圖(tu)像(xiang)和(he)文字。如果是(shi)具有模式自動識(shi)別的(de)(de)顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)器,有可(ke)(ke)能是(shi)黑(hei)屏(ping)(ping)狀態,但這(zhe)時面板下方(fang)(fang)指示(shi)(shi)燈為綠色。這(zhe)時重(zhong)(zhong)新(xin)啟(qi)動即(ji)可(ke)(ke)恢復。如果這(zhe)種方(fang)(fang)法(fa)不(bu)行,可(ke)(ke)以在(zai)把(ba)顯(xian)(xian)(xian)(xian)(xian)(xian)卡驅動程序(xu)刪除(chu),然后在(zai)重(zhong)(zhong)新(xin)安(an)裝顯(xian)(xian)(xian)(xian)(xian)(xian)卡驅動即(ji)可(ke)(ke)。還有在(zai)顯(xian)(xian)(xian)(xian)(xian)(xian)卡顯(xian)(xian)(xian)(xian)(xian)(xian)存發生故(gu)障(zhang)時會(hui)出現屏(ping)(ping)幕上固定位置顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)混亂,而(er)其他地(di)方(fang)(fang)卻顯(xian)(xian)(xian)(xian)(xian)(xian)示(shi)(shi)正常(chang)。也有顯(xian)(xian)(xian)(xian)(xian)(xian)卡損(sun)壞造(zao)成花屏(ping)(ping)的(de)(de)。