顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)的(de)(de)(de)亮度(du):要(yao)在(zai)一個環(huan)境中正確的(de)(de)(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)信息,要(yao)有(you)足夠的(de)(de)(de)亮度(du)以圖像的(de)(de)(de)實際對比度(du),尤其是(shi)用(yong)在(zai)戶外環(huan)境條件惡劣的(de)(de)(de)戶外LED顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)。所以,根據使(shi)用(yong)環(huan)境的(de)(de)(de)不同顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)要(yao)有(you)相應的(de)(de)(de)亮度(du)來。顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)投入使(shi)用(yong)后(hou),做為發(fa)光源的(de)(de)(de)LED管(guan)的(de)(de)(de)亮度(du)就開始衰減(jian),所以亮度(du)衰減(jian)的(de)(de)(de)速率是(shi)LED顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)(ping)的(de)(de)(de)重要(yao)性(xing)能之一。
場掃描(miao)電(dian)(dian)路:包括(kuo)場振(zhen)蕩(dang)(dang)和(he)場輸出(chu)兩部分(fen)。場振(zhen)蕩(dang)(dang)電(dian)(dian)路在同(tong)步(bu)信號(hao)下(xia),形成場頻鋸(ju)齒波(bo),鋸(ju)齒波(bo)再由(you)場輸出(chu)電(dian)(dian)路功(gong)率(lv)放大后加(jia)至場偏轉線(xian)圈,形成掃描(miao)電(dian)(dian)流,使電(dian)(dian)子(zi)槍發(fa)射出(chu)的電(dian)(dian)子(zi)上下(xia)拉開(kai)。場幅和(he)場中(zhong)心調節的功(gong)能也是在場掃描(miao)電(dian)(dian)路中(zhong)實現的,此外還輸出(chu)場頻鋸(ju)齒波(bo)到枕形校(xiao)(xiao)正電(dian)(dian)路,以(yi)校(xiao)(xiao)正水平(ping)枕形失真。
LCD顯(xian)(xian)示(shi)(shi)器(qi)即液(ye)(ye)晶顯(xian)(xian)示(shi)(shi)器(qi)。它的優點有機身薄、占地小和輻射小。LCD顯(xian)(xian)示(shi)(shi)器(qi)內部有很多液(ye)(ye)晶粒子,它們(men)有規律地排列(lie)成一定的形狀(zhuang),并且(qie)它們(men)每一面(mian)的顏(yan)(yan)色(se)(se)都不同,分為紅色(se)(se)、綠色(se)(se)和藍色(se)(se)。這三原(yuan)色(se)(se)能還原(yuan)成任(ren)意的其他(ta)顏(yan)(yan)色(se)(se)。當顯(xian)(xian)示(shi)(shi)器(qi)收到顯(xian)(xian)示(shi)(shi)數據時,會(hui)控制每個(ge)液(ye)(ye)晶粒子轉動到不同顏(yan)(yan)色(se)(se)的面(mian),從而組合成不同的顏(yan)(yan)色(se)(se)和圖像(xiang)。也因為這樣,LCD顯(xian)(xian)示(shi)(shi)器(qi)的缺點有色(se)(se)彩不夠艷和可視角度不大等。
LED顯示器集微電子技術、計(ji)算機技術、信息處理技術于(yu)一體(ti),以(yi)其(qi)色彩(cai)鮮(xian)艷、動態范圍廣(guang)、亮度高、壽命(ming)長、工作穩定可靠等優(you)點,成為(wei)具優(you)勢的新一代顯示設備(bei)。目前,LED顯示器已廣(guang)泛應用于(yu)大(da)型廣(guang)場、體(ti)育場館、證券(quan)交易大(da)廳等場所,可以(yi)滿足不同(tong)環境(jing)的需(xu)要。
一般濕度(du)保(bao)持在(zai)30%-80%之間(jian),顯(xian)示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)都能正(zheng)常(chang)工作(zuo),但一旦室內濕度(du)高(gao)于80%后(hou),顯(xian)示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)內部就會(hui)產生結露現(xian)象(xiang)。其(qi)內部的(de)(de)(de)電(dian)源變壓器(qi)(qi)(qi)(qi)和其(qi)他線圈受潮后(hou)也易(yi)產生漏電(dian),甚至(zhi)有可能造成(cheng)連線短(duan)路;而顯(xian)示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)的(de)(de)(de)高(gao)壓部位(wei)則極(ji)易(yi)產生放電(dian)現(xian)象(xiang);機(ji)內元器(qi)(qi)(qi)(qi)件容易(yi)生銹(xiu)、腐蝕,嚴重(zhong)時(shi)(shi)會(hui)使電(dian)路板發生短(duan)路。因此,LCD顯(xian)示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)注意防潮,長(chang)時(shi)(shi)間(jian)不用的(de)(de)(de)顯(xian)示(shi)(shi)(shi)器(qi)(qi)(qi)(qi),可以(yi)定(ding)期通電(dian)工作(zuo)一段(duan)時(shi)(shi)間(jian),讓顯(xian)示(shi)(shi)(shi)器(qi)(qi)(qi)(qi)工作(zuo)時(shi)(shi)產生的(de)(de)(de)熱(re)量將機(ji)內的(de)(de)(de)潮氣驅趕(gan)出去。
花屏通常是(shi)(shi)(shi)由于顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)器不(bu)支持主機送來的(de)顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)模(mo)式,往(wang)往(wang)是(shi)(shi)(shi)高于顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)器的(de)顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)模(mo)式,引(yin)起屏幕(mu)的(de)圖像混(hun)亂,無法看清楚屏幕(mu)上的(de)圖像和文字。如(ru)果是(shi)(shi)(shi)具有(you)模(mo)式自動識別的(de)顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)器,有(you)可能是(shi)(shi)(shi)黑屏狀(zhuang)態,但這(zhe)時面板(ban)下(xia)方指示(shi)(shi)(shi)燈為綠色(se)。這(zhe)時重(zhong)(zhong)新(xin)啟動即可恢復。如(ru)果這(zhe)種方法不(bu)行,可以在把顯(xian)(xian)(xian)(xian)卡(ka)驅動程序(xu)刪除,然后在重(zhong)(zhong)新(xin)安裝顯(xian)(xian)(xian)(xian)卡(ka)驅動即可。還(huan)有(you)在顯(xian)(xian)(xian)(xian)卡(ka)顯(xian)(xian)(xian)(xian)存(cun)發生故(gu)障時會出現屏幕(mu)上固定位置顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)混(hun)亂,而其他地方卻顯(xian)(xian)(xian)(xian)示(shi)(shi)(shi)正常。也有(you)顯(xian)(xian)(xian)(xian)卡(ka)損壞造成花屏的(de)。