顯(xian)示(shi)屏的亮度:要(yao)在一(yi)個環(huan)境中正(zheng)確的顯(xian)示(shi)信(xin)息,要(yao)有(you)足(zu)夠的亮度以(yi)圖(tu)像(xiang)的實際(ji)對比度,尤其是(shi)用在戶外環(huan)境條件(jian)惡劣(lie)的戶外LED顯(xian)示(shi)屏。所(suo)以(yi),根據使用環(huan)境的不同顯(xian)示(shi)屏要(yao)有(you)相應的亮度來。顯(xian)示(shi)屏投(tou)入使用后,做(zuo)為發(fa)光源的LED管(guan)的亮度就開(kai)始(shi)衰減,所(suo)以(yi)亮度衰減的速(su)率是(shi)LED顯(xian)示(shi)屏的重要(yao)性能之一(yi)。
場(chang)(chang)(chang)掃描(miao)電(dian)(dian)(dian)路(lu):包括場(chang)(chang)(chang)振(zhen)蕩和場(chang)(chang)(chang)輸出(chu)兩部分。場(chang)(chang)(chang)振(zhen)蕩電(dian)(dian)(dian)路(lu)在(zai)同步(bu)信號下(xia)(xia),形成(cheng)(cheng)場(chang)(chang)(chang)頻鋸(ju)齒波,鋸(ju)齒波再(zai)由場(chang)(chang)(chang)輸出(chu)電(dian)(dian)(dian)路(lu)功率放大后加至(zhi)場(chang)(chang)(chang)偏轉線圈,形成(cheng)(cheng)掃描(miao)電(dian)(dian)(dian)流(liu),使電(dian)(dian)(dian)子(zi)槍發射出(chu)的電(dian)(dian)(dian)子(zi)上下(xia)(xia)拉開。場(chang)(chang)(chang)幅(fu)和場(chang)(chang)(chang)中心調節(jie)的功能(neng)也(ye)是在(zai)場(chang)(chang)(chang)掃描(miao)電(dian)(dian)(dian)路(lu)中實現(xian)的,此外還輸出(chu)場(chang)(chang)(chang)頻鋸(ju)齒波到(dao)枕形校正(zheng)電(dian)(dian)(dian)路(lu),以校正(zheng)水平枕形失真。
LCD顯(xian)(xian)示(shi)(shi)器(qi)(qi)即液晶顯(xian)(xian)示(shi)(shi)器(qi)(qi)。它(ta)的(de)優點有(you)機身薄、占地小和(he)輻射(she)小。LCD顯(xian)(xian)示(shi)(shi)器(qi)(qi)內部有(you)很多液晶粒子(zi),它(ta)們(men)有(you)規(gui)律地排列成一定(ding)的(de)形(xing)狀(zhuang),并(bing)且它(ta)們(men)每一面的(de)顏(yan)(yan)色都(dou)不(bu)(bu)同,分為紅色、綠色和(he)藍色。這(zhe)三原色能還原成任意的(de)其他顏(yan)(yan)色。當顯(xian)(xian)示(shi)(shi)器(qi)(qi)收(shou)到(dao)顯(xian)(xian)示(shi)(shi)數據時,會控制每個液晶粒子(zi)轉(zhuan)動到(dao)不(bu)(bu)同顏(yan)(yan)色的(de)面,從而組(zu)合成不(bu)(bu)同的(de)顏(yan)(yan)色和(he)圖像。也因為這(zhe)樣,LCD顯(xian)(xian)示(shi)(shi)器(qi)(qi)的(de)缺點有(you)色彩(cai)不(bu)(bu)夠(gou)艷(yan)和(he)可視角(jiao)度不(bu)(bu)大等(deng)。
LED顯(xian)示(shi)器(qi)集微電子技術、計算機技術、信(xin)息處理(li)技術于一體,以其色彩(cai)鮮艷、動態范圍廣(guang)、亮度高、壽命長、工作(zuo)穩定(ding)可靠等(deng)優點,成為具優勢(shi)的(de)新一代顯(xian)示(shi)設備。目前(qian),LED顯(xian)示(shi)器(qi)已廣(guang)泛應用于大(da)型廣(guang)場(chang)、體育場(chang)館、證券交易大(da)廳等(deng)場(chang)所,可以滿足不(bu)同環境的(de)需要(yao)。
一般濕度(du)保持在30%-80%之間(jian),顯示(shi)(shi)器(qi)都能正常工(gong)作,但一旦室內濕度(du)高于80%后,顯示(shi)(shi)器(qi)內部就會產生(sheng)結(jie)露現象。其(qi)(qi)內部的電源變壓(ya)器(qi)和(he)其(qi)(qi)他線圈受潮后也易(yi)產生(sheng)漏電,甚至有可(ke)能造成連線短(duan)路(lu);而顯示(shi)(shi)器(qi)的高壓(ya)部位則極易(yi)產生(sheng)放電現象;機內元器(qi)件容易(yi)生(sheng)銹、腐(fu)蝕,嚴重時(shi)(shi)會使電路(lu)板發生(sheng)短(duan)路(lu)。因(yin)此,LCD顯示(shi)(shi)器(qi)注意防(fang)潮,長時(shi)(shi)間(jian)不用(yong)的顯示(shi)(shi)器(qi),可(ke)以定(ding)期通(tong)電工(gong)作一段(duan)時(shi)(shi)間(jian),讓顯示(shi)(shi)器(qi)工(gong)作時(shi)(shi)產生(sheng)的熱量將機內的潮氣(qi)驅(qu)趕出去。
花(hua)屏(ping)(ping)通常是(shi)(shi)由于顯(xian)(xian)(xian)(xian)示(shi)(shi)器(qi)不支持主機送來的(de)(de)顯(xian)(xian)(xian)(xian)示(shi)(shi)模式(shi),往(wang)往(wang)是(shi)(shi)高于顯(xian)(xian)(xian)(xian)示(shi)(shi)器(qi)的(de)(de)顯(xian)(xian)(xian)(xian)示(shi)(shi)模式(shi),引起屏(ping)(ping)幕的(de)(de)圖(tu)像混亂,無法(fa)看清(qing)楚(chu)屏(ping)(ping)幕上(shang)的(de)(de)圖(tu)像和文字。如果是(shi)(shi)具有模式(shi)自動識別的(de)(de)顯(xian)(xian)(xian)(xian)示(shi)(shi)器(qi),有可(ke)能(neng)是(shi)(shi)黑屏(ping)(ping)狀(zhuang)態(tai),但(dan)這時面板下方(fang)指示(shi)(shi)燈為(wei)綠色。這時重新(xin)啟動即(ji)可(ke)恢(hui)復。如果這種方(fang)法(fa)不行,可(ke)以在(zai)把(ba)顯(xian)(xian)(xian)(xian)卡驅動程(cheng)序(xu)刪除,然(ran)后(hou)在(zai)重新(xin)安裝顯(xian)(xian)(xian)(xian)卡驅動即(ji)可(ke)。還有在(zai)顯(xian)(xian)(xian)(xian)卡顯(xian)(xian)(xian)(xian)存發(fa)生故(gu)障(zhang)時會出現屏(ping)(ping)幕上(shang)固(gu)定(ding)位(wei)置顯(xian)(xian)(xian)(xian)示(shi)(shi)混亂,而其他地(di)方(fang)卻顯(xian)(xian)(xian)(xian)示(shi)(shi)正(zheng)常。也有顯(xian)(xian)(xian)(xian)卡損壞造成花(hua)屏(ping)(ping)的(de)(de)。