顯示(shi)(shi)(shi)屏(ping)的(de)亮(liang)度(du)(du):要(yao)在一個(ge)環(huan)境(jing)中正確的(de)顯示(shi)(shi)(shi)信息,要(yao)有(you)(you)足夠(gou)的(de)亮(liang)度(du)(du)以圖像(xiang)的(de)實際對比(bi)度(du)(du),尤其是(shi)(shi)用在戶(hu)外環(huan)境(jing)條件惡劣的(de)戶(hu)外LED顯示(shi)(shi)(shi)屏(ping)。所以,根(gen)據使用環(huan)境(jing)的(de)不同顯示(shi)(shi)(shi)屏(ping)要(yao)有(you)(you)相應的(de)亮(liang)度(du)(du)來。顯示(shi)(shi)(shi)屏(ping)投入使用后(hou),做為發光(guang)源的(de)LED管的(de)亮(liang)度(du)(du)就開始(shi)衰(shuai)減(jian),所以亮(liang)度(du)(du)衰(shuai)減(jian)的(de)速率是(shi)(shi)LED顯示(shi)(shi)(shi)屏(ping)的(de)重要(yao)性(xing)能之一。
場(chang)掃(sao)描電(dian)(dian)(dian)(dian)路:包括(kuo)場(chang)振蕩和場(chang)輸出兩(liang)部分。場(chang)振蕩電(dian)(dian)(dian)(dian)路在同步信號(hao)下,形(xing)成場(chang)頻鋸(ju)齒波(bo),鋸(ju)齒波(bo)再由(you)場(chang)輸出電(dian)(dian)(dian)(dian)路功率(lv)放大后加至場(chang)偏轉線圈(quan),形(xing)成掃(sao)描電(dian)(dian)(dian)(dian)流,使電(dian)(dian)(dian)(dian)子槍發(fa)射(she)出的電(dian)(dian)(dian)(dian)子上下拉(la)開。場(chang)幅和場(chang)中(zhong)心調(diao)節的功能(neng)也是在場(chang)掃(sao)描電(dian)(dian)(dian)(dian)路中(zhong)實現的,此(ci)外還輸出場(chang)頻鋸(ju)齒波(bo)到枕(zhen)形(xing)校(xiao)正電(dian)(dian)(dian)(dian)路,以(yi)校(xiao)正水平枕(zhen)形(xing)失真(zhen)。
LCD顯(xian)示(shi)器(qi)(qi)即液晶(jing)顯(xian)示(shi)器(qi)(qi)。它的(de)(de)優點有機身薄(bo)、占地(di)小和(he)(he)(he)輻射小。LCD顯(xian)示(shi)器(qi)(qi)內(nei)部(bu)有很多液晶(jing)粒子,它們有規律地(di)排列成一定的(de)(de)形(xing)狀(zhuang),并(bing)且(qie)它們每一面的(de)(de)顏(yan)色(se)(se)都不(bu)同,分為(wei)紅色(se)(se)、綠色(se)(se)和(he)(he)(he)藍色(se)(se)。這三原色(se)(se)能還原成任意的(de)(de)其他顏(yan)色(se)(se)。當顯(xian)示(shi)器(qi)(qi)收到(dao)顯(xian)示(shi)數(shu)據時,會控(kong)制每個液晶(jing)粒子轉動到(dao)不(bu)同顏(yan)色(se)(se)的(de)(de)面,從而組(zu)合成不(bu)同的(de)(de)顏(yan)色(se)(se)和(he)(he)(he)圖像。也因為(wei)這樣,LCD顯(xian)示(shi)器(qi)(qi)的(de)(de)缺點有色(se)(se)彩不(bu)夠艷(yan)和(he)(he)(he)可視角度不(bu)大(da)等。
LED顯(xian)示(shi)(shi)器集微電子技(ji)術(shu)、計算機技(ji)術(shu)、信息(xi)處理技(ji)術(shu)于一(yi)體(ti),以其色彩鮮艷、動態(tai)范圍(wei)廣(guang)、亮度(du)高、壽命長(chang)、工作(zuo)穩定可(ke)靠(kao)等優點,成為(wei)具(ju)優勢的新一(yi)代顯(xian)示(shi)(shi)設(she)備。目前,LED顯(xian)示(shi)(shi)器已廣(guang)泛應用于大(da)型廣(guang)場、體(ti)育場館、證券(quan)交易大(da)廳等場所(suo),可(ke)以滿足不同環境(jing)的需(xu)要。
一般濕度保持在30%-80%之間(jian),顯(xian)示器(qi)(qi)都能正常工作,但一旦室內(nei)濕度高于80%后,顯(xian)示器(qi)(qi)內(nei)部(bu)就會(hui)產生(sheng)(sheng)(sheng)結露現(xian)象。其內(nei)部(bu)的電(dian)(dian)源變壓(ya)器(qi)(qi)和其他線圈受潮后也(ye)易(yi)產生(sheng)(sheng)(sheng)漏電(dian)(dian),甚至有可(ke)能造(zao)成連線短路;而顯(xian)示器(qi)(qi)的高壓(ya)部(bu)位則(ze)極易(yi)產生(sheng)(sheng)(sheng)放電(dian)(dian)現(xian)象;機(ji)內(nei)元器(qi)(qi)件容易(yi)生(sheng)(sheng)(sheng)銹(xiu)、腐蝕(shi),嚴重時會(hui)使電(dian)(dian)路板發生(sheng)(sheng)(sheng)短路。因此,LCD顯(xian)示器(qi)(qi)注意防潮,長時間(jian)不(bu)用的顯(xian)示器(qi)(qi),可(ke)以定(ding)期通電(dian)(dian)工作一段(duan)時間(jian),讓顯(xian)示器(qi)(qi)工作時產生(sheng)(sheng)(sheng)的熱量(liang)將機(ji)內(nei)的潮氣驅趕出去。
花(hua)屏(ping)通常是由于顯(xian)(xian)(xian)(xian)示(shi)(shi)器(qi)不支持主(zhu)機送來的顯(xian)(xian)(xian)(xian)示(shi)(shi)模(mo)(mo)式,往往是高于顯(xian)(xian)(xian)(xian)示(shi)(shi)器(qi)的顯(xian)(xian)(xian)(xian)示(shi)(shi)模(mo)(mo)式,引(yin)起屏(ping)幕的圖像(xiang)混亂,無法看清楚屏(ping)幕上(shang)(shang)的圖像(xiang)和文字。如果是具有模(mo)(mo)式自動(dong)(dong)識別的顯(xian)(xian)(xian)(xian)示(shi)(shi)器(qi),有可能是黑屏(ping)狀態,但這時(shi)面板(ban)下方指示(shi)(shi)燈為綠色。這時(shi)重(zhong)新(xin)啟動(dong)(dong)即(ji)可恢復。如果這種方法不行(xing),可以在(zai)把(ba)顯(xian)(xian)(xian)(xian)卡驅動(dong)(dong)程序刪(shan)除,然后在(zai)重(zhong)新(xin)安裝顯(xian)(xian)(xian)(xian)卡驅動(dong)(dong)即(ji)可。還有在(zai)顯(xian)(xian)(xian)(xian)卡顯(xian)(xian)(xian)(xian)存發生(sheng)故障時(shi)會出現屏(ping)幕上(shang)(shang)固定位置顯(xian)(xian)(xian)(xian)示(shi)(shi)混亂,而其他地方卻顯(xian)(xian)(xian)(xian)示(shi)(shi)正常。也有顯(xian)(xian)(xian)(xian)卡損壞造成花(hua)屏(ping)的。