顯(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)的(de)(de)亮(liang)度(du):要在一(yi)個(ge)環(huan)境(jing)中正確的(de)(de)顯(xian)(xian)示(shi)(shi)(shi)信(xin)息,要有足夠的(de)(de)亮(liang)度(du)以圖像的(de)(de)實際對比度(du),尤其(qi)是用在戶外環(huan)境(jing)條(tiao)件惡劣(lie)的(de)(de)戶外LED顯(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)。所(suo)以,根據使用環(huan)境(jing)的(de)(de)不同(tong)顯(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)要有相應的(de)(de)亮(liang)度(du)來。顯(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)投入使用后,做為發光源(yuan)的(de)(de)LED管(guan)的(de)(de)亮(liang)度(du)就開(kai)始衰(shuai)減(jian),所(suo)以亮(liang)度(du)衰(shuai)減(jian)的(de)(de)速(su)率是LED顯(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)的(de)(de)重要性能之(zhi)一(yi)。
場(chang)(chang)(chang)(chang)(chang)掃描電(dian)(dian)(dian)路(lu)(lu)(lu):包括場(chang)(chang)(chang)(chang)(chang)振(zhen)(zhen)蕩(dang)(dang)和場(chang)(chang)(chang)(chang)(chang)輸出(chu)(chu)兩部分。場(chang)(chang)(chang)(chang)(chang)振(zhen)(zhen)蕩(dang)(dang)電(dian)(dian)(dian)路(lu)(lu)(lu)在同步(bu)信號下,形成(cheng)場(chang)(chang)(chang)(chang)(chang)頻(pin)鋸(ju)齒波(bo),鋸(ju)齒波(bo)再由場(chang)(chang)(chang)(chang)(chang)輸出(chu)(chu)電(dian)(dian)(dian)路(lu)(lu)(lu)功率放大后(hou)加(jia)至場(chang)(chang)(chang)(chang)(chang)偏轉線圈,形成(cheng)掃描電(dian)(dian)(dian)流,使(shi)電(dian)(dian)(dian)子槍發射出(chu)(chu)的電(dian)(dian)(dian)子上下拉(la)開(kai)。場(chang)(chang)(chang)(chang)(chang)幅和場(chang)(chang)(chang)(chang)(chang)中心調節的功能也是在場(chang)(chang)(chang)(chang)(chang)掃描電(dian)(dian)(dian)路(lu)(lu)(lu)中實(shi)現的,此(ci)外(wai)還(huan)輸出(chu)(chu)場(chang)(chang)(chang)(chang)(chang)頻(pin)鋸(ju)齒波(bo)到枕形校正(zheng)電(dian)(dian)(dian)路(lu)(lu)(lu),以校正(zheng)水平枕形失真。
LCD顯(xian)(xian)示(shi)器(qi)(qi)(qi)即液晶顯(xian)(xian)示(shi)器(qi)(qi)(qi)。它的(de)(de)(de)(de)優點有(you)機(ji)身(shen)薄(bo)、占地小和輻射小。LCD顯(xian)(xian)示(shi)器(qi)(qi)(qi)內(nei)部(bu)有(you)很多液晶粒子,它們有(you)規律地排列成一定的(de)(de)(de)(de)形(xing)狀,并且它們每一面的(de)(de)(de)(de)顏色(se)都不(bu)(bu)同,分為(wei)紅(hong)色(se)、綠色(se)和藍色(se)。這三(san)原色(se)能(neng)還原成任意的(de)(de)(de)(de)其他顏色(se)。當顯(xian)(xian)示(shi)器(qi)(qi)(qi)收到(dao)顯(xian)(xian)示(shi)數據時,會控制每個液晶粒子轉動到(dao)不(bu)(bu)同顏色(se)的(de)(de)(de)(de)面,從而(er)組合(he)成不(bu)(bu)同的(de)(de)(de)(de)顏色(se)和圖像。也因(yin)為(wei)這樣(yang),LCD顯(xian)(xian)示(shi)器(qi)(qi)(qi)的(de)(de)(de)(de)缺點有(you)色(se)彩不(bu)(bu)夠艷和可視角度(du)不(bu)(bu)大等。
LED顯(xian)示(shi)器集微電(dian)子(zi)技術(shu)、計算機(ji)技術(shu)、信息(xi)處(chu)理技術(shu)于一體(ti),以其色(se)彩(cai)鮮艷、動態范圍廣、亮度高、壽命長(chang)、工(gong)作(zuo)穩定可靠等(deng)優點,成為具優勢的新一代顯(xian)示(shi)設備。目(mu)前,LED顯(xian)示(shi)器已廣泛應用于大型廣場(chang)、體(ti)育(yu)場(chang)館、證券交易大廳等(deng)場(chang)所,可以滿足不同環境的需要。
一(yi)般濕度保(bao)持(chi)在30%-80%之(zhi)間(jian),顯(xian)(xian)示(shi)(shi)(shi)(shi)器都能正常工作(zuo),但一(yi)旦室內濕度高(gao)于80%后,顯(xian)(xian)示(shi)(shi)(shi)(shi)器內部就會(hui)產(chan)生(sheng)(sheng)結露(lu)現象。其內部的(de)(de)電(dian)源變壓(ya)器和(he)其他線圈受潮(chao)(chao)后也易產(chan)生(sheng)(sheng)漏電(dian),甚至有可(ke)能造成連線短路;而顯(xian)(xian)示(shi)(shi)(shi)(shi)器的(de)(de)高(gao)壓(ya)部位則極易產(chan)生(sheng)(sheng)放電(dian)現象;機(ji)內元(yuan)器件容易生(sheng)(sheng)銹、腐(fu)蝕,嚴重(zhong)時(shi)會(hui)使電(dian)路板發生(sheng)(sheng)短路。因(yin)此,LCD顯(xian)(xian)示(shi)(shi)(shi)(shi)器注意防(fang)潮(chao)(chao),長時(shi)間(jian)不用的(de)(de)顯(xian)(xian)示(shi)(shi)(shi)(shi)器,可(ke)以定期通(tong)電(dian)工作(zuo)一(yi)段時(shi)間(jian),讓(rang)顯(xian)(xian)示(shi)(shi)(shi)(shi)器工作(zuo)時(shi)產(chan)生(sheng)(sheng)的(de)(de)熱量將機(ji)內的(de)(de)潮(chao)(chao)氣驅趕(gan)出去(qu)。
花(hua)屏(ping)(ping)通常是(shi)(shi)(shi)由于顯(xian)示(shi)(shi)器(qi)不(bu)支持(chi)主機送來(lai)的顯(xian)示(shi)(shi)模(mo)式,往往是(shi)(shi)(shi)高于顯(xian)示(shi)(shi)器(qi)的顯(xian)示(shi)(shi)模(mo)式,引起屏(ping)(ping)幕(mu)(mu)的圖像混(hun)亂,無法看(kan)清(qing)楚屏(ping)(ping)幕(mu)(mu)上(shang)的圖像和文(wen)字。如(ru)果(guo)是(shi)(shi)(shi)具有(you)模(mo)式自動(dong)識別的顯(xian)示(shi)(shi)器(qi),有(you)可(ke)(ke)能(neng)是(shi)(shi)(shi)黑屏(ping)(ping)狀態,但這(zhe)時(shi)面板下方指(zhi)示(shi)(shi)燈為綠色。這(zhe)時(shi)重新啟動(dong)即(ji)可(ke)(ke)恢復。如(ru)果(guo)這(zhe)種(zhong)方法不(bu)行(xing),可(ke)(ke)以在把顯(xian)卡驅(qu)動(dong)程序刪除,然后在重新安裝顯(xian)卡驅(qu)動(dong)即(ji)可(ke)(ke)。還有(you)在顯(xian)卡顯(xian)存發生故障時(shi)會出現屏(ping)(ping)幕(mu)(mu)上(shang)固定位(wei)置顯(xian)示(shi)(shi)混(hun)亂,而其他(ta)地方卻顯(xian)示(shi)(shi)正常。也有(you)顯(xian)卡損(sun)壞造成花(hua)屏(ping)(ping)的。