顯(xian)(xian)(xian)示屏(ping)(ping)(ping)的(de)(de)亮度(du):要在(zai)一個(ge)環境中正確的(de)(de)顯(xian)(xian)(xian)示信息,要有足夠的(de)(de)亮度(du)以(yi)圖像(xiang)的(de)(de)實(shi)際對比度(du),尤其是(shi)用(yong)在(zai)戶外(wai)環境條(tiao)件惡劣的(de)(de)戶外(wai)LED顯(xian)(xian)(xian)示屏(ping)(ping)(ping)。所(suo)(suo)以(yi),根(gen)據使(shi)用(yong)環境的(de)(de)不同(tong)顯(xian)(xian)(xian)示屏(ping)(ping)(ping)要有相應(ying)的(de)(de)亮度(du)來。顯(xian)(xian)(xian)示屏(ping)(ping)(ping)投入使(shi)用(yong)后,做為發光源的(de)(de)LED管的(de)(de)亮度(du)就(jiu)開始(shi)衰減,所(suo)(suo)以(yi)亮度(du)衰減的(de)(de)速率是(shi)LED顯(xian)(xian)(xian)示屏(ping)(ping)(ping)的(de)(de)重要性(xing)能之一。
場(chang)(chang)(chang)(chang)掃(sao)描電(dian)(dian)路(lu)(lu):包(bao)括場(chang)(chang)(chang)(chang)振(zhen)蕩和場(chang)(chang)(chang)(chang)輸出兩部分。場(chang)(chang)(chang)(chang)振(zhen)蕩電(dian)(dian)路(lu)(lu)在(zai)同步(bu)信號下,形(xing)成場(chang)(chang)(chang)(chang)頻鋸(ju)齒(chi)(chi)波(bo)(bo),鋸(ju)齒(chi)(chi)波(bo)(bo)再由場(chang)(chang)(chang)(chang)輸出電(dian)(dian)路(lu)(lu)功率放(fang)大(da)后加至場(chang)(chang)(chang)(chang)偏轉(zhuan)線圈,形(xing)成掃(sao)描電(dian)(dian)流,使電(dian)(dian)子槍(qiang)發(fa)射出的(de)電(dian)(dian)子上下拉開。場(chang)(chang)(chang)(chang)幅和場(chang)(chang)(chang)(chang)中心調節(jie)的(de)功能也是在(zai)場(chang)(chang)(chang)(chang)掃(sao)描電(dian)(dian)路(lu)(lu)中實(shi)現的(de),此外還(huan)輸出場(chang)(chang)(chang)(chang)頻鋸(ju)齒(chi)(chi)波(bo)(bo)到枕(zhen)形(xing)校正電(dian)(dian)路(lu)(lu),以校正水平(ping)枕(zhen)形(xing)失真。
LCD顯示(shi)(shi)(shi)器(qi)即液(ye)(ye)晶顯示(shi)(shi)(shi)器(qi)。它(ta)的(de)(de)優點有(you)機身薄、占(zhan)地(di)小和輻射小。LCD顯示(shi)(shi)(shi)器(qi)內(nei)部有(you)很多液(ye)(ye)晶粒子,它(ta)們(men)有(you)規律(lv)地(di)排列(lie)成一(yi)定(ding)的(de)(de)形狀,并(bing)且它(ta)們(men)每(mei)一(yi)面的(de)(de)顏(yan)色(se)(se)都不(bu)(bu)同,分(fen)為(wei)紅色(se)(se)、綠色(se)(se)和藍色(se)(se)。這(zhe)三原色(se)(se)能還原成任意(yi)的(de)(de)其他顏(yan)色(se)(se)。當顯示(shi)(shi)(shi)器(qi)收到顯示(shi)(shi)(shi)數據時,會控(kong)制每(mei)個液(ye)(ye)晶粒子轉動到不(bu)(bu)同顏(yan)色(se)(se)的(de)(de)面,從而組合成不(bu)(bu)同的(de)(de)顏(yan)色(se)(se)和圖(tu)像。也因為(wei)這(zhe)樣,LCD顯示(shi)(shi)(shi)器(qi)的(de)(de)缺點有(you)色(se)(se)彩不(bu)(bu)夠(gou)艷和可視角度不(bu)(bu)大等。
LED顯示器(qi)集微電子技(ji)術、計算(suan)機(ji)技(ji)術、信息處理技(ji)術于一體,以其色彩(cai)鮮艷、動態范圍廣(guang)、亮度高、壽命長、工(gong)作穩定可(ke)靠等優(you)點,成為具優(you)勢(shi)的新一代(dai)顯示設備(bei)。目前,LED顯示器(qi)已廣(guang)泛應(ying)用于大型(xing)廣(guang)場、體育場館(guan)、證券(quan)交易大廳等場所(suo),可(ke)以滿足不同(tong)環境的需要。
一(yi)般濕(shi)度保持在30%-80%之間(jian)(jian),顯(xian)(xian)示(shi)器(qi)(qi)都(dou)能正常工(gong)作,但一(yi)旦室(shi)內(nei)濕(shi)度高于80%后,顯(xian)(xian)示(shi)器(qi)(qi)內(nei)部(bu)就會(hui)產生(sheng)(sheng)結(jie)露現(xian)象。其內(nei)部(bu)的(de)電(dian)源變壓器(qi)(qi)和(he)其他線(xian)(xian)圈(quan)受潮(chao)后也易(yi)(yi)產生(sheng)(sheng)漏電(dian),甚至有可能造成連(lian)線(xian)(xian)短(duan)路(lu)(lu);而顯(xian)(xian)示(shi)器(qi)(qi)的(de)高壓部(bu)位(wei)則極易(yi)(yi)產生(sheng)(sheng)放電(dian)現(xian)象;機內(nei)元器(qi)(qi)件容易(yi)(yi)生(sheng)(sheng)銹(xiu)、腐蝕,嚴重(zhong)時會(hui)使電(dian)路(lu)(lu)板發生(sheng)(sheng)短(duan)路(lu)(lu)。因(yin)此,LCD顯(xian)(xian)示(shi)器(qi)(qi)注意(yi)防潮(chao),長時間(jian)(jian)不用的(de)顯(xian)(xian)示(shi)器(qi)(qi),可以(yi)定期通電(dian)工(gong)作一(yi)段時間(jian)(jian),讓顯(xian)(xian)示(shi)器(qi)(qi)工(gong)作時產生(sheng)(sheng)的(de)熱量(liang)將機內(nei)的(de)潮(chao)氣驅趕出(chu)去。
花屏通常(chang)是由于(yu)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)(qi)不支持主機送來的(de)(de)(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)模式,往往是高于(yu)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)(qi)的(de)(de)(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)模式,引(yin)起屏幕的(de)(de)(de)圖(tu)像混(hun)亂(luan),無(wu)法(fa)看清楚屏幕上的(de)(de)(de)圖(tu)像和文字。如(ru)果(guo)是具(ju)有(you)模式自(zi)動識別的(de)(de)(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)(qi),有(you)可(ke)(ke)能(neng)是黑屏狀態(tai),但(dan)這時(shi)面板(ban)下方指示(shi)(shi)(shi)(shi)燈(deng)為(wei)綠色。這時(shi)重(zhong)新啟動即(ji)可(ke)(ke)恢復。如(ru)果(guo)這種(zhong)方法(fa)不行,可(ke)(ke)以在(zai)把顯(xian)(xian)(xian)卡(ka)(ka)(ka)驅動程序刪除,然后在(zai)重(zhong)新安裝顯(xian)(xian)(xian)卡(ka)(ka)(ka)驅動即(ji)可(ke)(ke)。還有(you)在(zai)顯(xian)(xian)(xian)卡(ka)(ka)(ka)顯(xian)(xian)(xian)存發生(sheng)故障時(shi)會出現屏幕上固定位置顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)混(hun)亂(luan),而其他地方卻顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)正常(chang)。也有(you)顯(xian)(xian)(xian)卡(ka)(ka)(ka)損壞造(zao)成花屏的(de)(de)(de)。