顯(xian)(xian)示(shi)(shi)屏(ping)(ping)(ping)的亮(liang)(liang)度(du)(du)(du):要(yao)(yao)在一個環(huan)(huan)境中正確的顯(xian)(xian)示(shi)(shi)信息,要(yao)(yao)有(you)足夠的亮(liang)(liang)度(du)(du)(du)以圖像的實際對比(bi)度(du)(du)(du),尤其是(shi)用(yong)在戶外(wai)(wai)環(huan)(huan)境條件(jian)惡劣的戶外(wai)(wai)LED顯(xian)(xian)示(shi)(shi)屏(ping)(ping)(ping)。所以,根(gen)據使用(yong)環(huan)(huan)境的不同顯(xian)(xian)示(shi)(shi)屏(ping)(ping)(ping)要(yao)(yao)有(you)相應的亮(liang)(liang)度(du)(du)(du)來。顯(xian)(xian)示(shi)(shi)屏(ping)(ping)(ping)投(tou)入使用(yong)后,做為發光(guang)源的LED管(guan)的亮(liang)(liang)度(du)(du)(du)就開始衰減(jian),所以亮(liang)(liang)度(du)(du)(du)衰減(jian)的速(su)率是(shi)LED顯(xian)(xian)示(shi)(shi)屏(ping)(ping)(ping)的重要(yao)(yao)性(xing)能之(zhi)一。
場(chang)(chang)掃描(miao)(miao)電(dian)(dian)路(lu):包括場(chang)(chang)振(zhen)蕩和(he)場(chang)(chang)輸(shu)出兩部分(fen)。場(chang)(chang)振(zhen)蕩電(dian)(dian)路(lu)在同步信號下,形(xing)(xing)(xing)成場(chang)(chang)頻鋸(ju)齒波(bo),鋸(ju)齒波(bo)再(zai)由場(chang)(chang)輸(shu)出電(dian)(dian)路(lu)功率放大后加(jia)至場(chang)(chang)偏轉線圈,形(xing)(xing)(xing)成掃描(miao)(miao)電(dian)(dian)流,使(shi)電(dian)(dian)子槍發射(she)出的電(dian)(dian)子上下拉開。場(chang)(chang)幅(fu)和(he)場(chang)(chang)中心(xin)調節(jie)的功能也是在場(chang)(chang)掃描(miao)(miao)電(dian)(dian)路(lu)中實(shi)現的,此外還輸(shu)出場(chang)(chang)頻鋸(ju)齒波(bo)到(dao)枕(zhen)形(xing)(xing)(xing)校正電(dian)(dian)路(lu),以校正水(shui)平(ping)枕(zhen)形(xing)(xing)(xing)失真(zhen)。
LCD顯(xian)(xian)示(shi)器(qi)即液晶顯(xian)(xian)示(shi)器(qi)。它(ta)的(de)(de)(de)優點(dian)有(you)機(ji)身(shen)薄(bo)、占地小和輻射小。LCD顯(xian)(xian)示(shi)器(qi)內部有(you)很多液晶粒子(zi),它(ta)們有(you)規律地排列(lie)成一(yi)定的(de)(de)(de)形狀,并且它(ta)們每一(yi)面(mian)的(de)(de)(de)顏色(se)都不(bu)同(tong)(tong),分為紅色(se)、綠色(se)和藍色(se)。這(zhe)三(san)原(yuan)色(se)能還原(yuan)成任(ren)意的(de)(de)(de)其(qi)他顏色(se)。當顯(xian)(xian)示(shi)器(qi)收到顯(xian)(xian)示(shi)數據時(shi),會(hui)控制每個液晶粒子(zi)轉動(dong)到不(bu)同(tong)(tong)顏色(se)的(de)(de)(de)面(mian),從(cong)而(er)組合(he)成不(bu)同(tong)(tong)的(de)(de)(de)顏色(se)和圖像。也因為這(zhe)樣,LCD顯(xian)(xian)示(shi)器(qi)的(de)(de)(de)缺(que)點(dian)有(you)色(se)彩不(bu)夠艷(yan)和可(ke)視角度不(bu)大(da)等。
LED顯(xian)(xian)示器(qi)(qi)集微電(dian)子技(ji)術(shu)、計算(suan)機技(ji)術(shu)、信息處理(li)技(ji)術(shu)于(yu)一體(ti),以其色彩鮮(xian)艷、動態(tai)范圍廣(guang)、亮度高、壽(shou)命長(chang)、工(gong)作(zuo)穩定可靠等優點,成為(wei)具(ju)優勢的新一代顯(xian)(xian)示設備(bei)。目前,LED顯(xian)(xian)示器(qi)(qi)已廣(guang)泛應用于(yu)大(da)型廣(guang)場(chang)、體(ti)育場(chang)館、證券交易(yi)大(da)廳等場(chang)所,可以滿足不同環境的需要。
一般濕度保持(chi)在30%-80%之(zhi)間(jian),顯(xian)示(shi)(shi)(shi)器(qi)都能正常工作,但一旦室(shi)內濕度高于80%后,顯(xian)示(shi)(shi)(shi)器(qi)內部就會產(chan)(chan)生結露現象。其(qi)(qi)內部的(de)電(dian)(dian)源變壓器(qi)和其(qi)(qi)他線圈受潮(chao)后也易(yi)產(chan)(chan)生漏電(dian)(dian),甚至有可能造(zao)成連線短(duan)路(lu);而顯(xian)示(shi)(shi)(shi)器(qi)的(de)高壓部位則極易(yi)產(chan)(chan)生放(fang)電(dian)(dian)現象;機內元器(qi)件容易(yi)生銹(xiu)、腐蝕(shi),嚴重時(shi)(shi)會使(shi)電(dian)(dian)路(lu)板發生短(duan)路(lu)。因此(ci),LCD顯(xian)示(shi)(shi)(shi)器(qi)注意防(fang)潮(chao),長(chang)時(shi)(shi)間(jian)不用(yong)的(de)顯(xian)示(shi)(shi)(shi)器(qi),可以定期(qi)通電(dian)(dian)工作一段時(shi)(shi)間(jian),讓顯(xian)示(shi)(shi)(shi)器(qi)工作時(shi)(shi)產(chan)(chan)生的(de)熱量將(jiang)機內的(de)潮(chao)氣驅(qu)趕出去。
花屏(ping)通常是由于顯(xian)(xian)示器不(bu)支持主機送來的(de)顯(xian)(xian)示模式,往往是高于顯(xian)(xian)示器的(de)顯(xian)(xian)示模式,引起屏(ping)幕的(de)圖(tu)像混亂(luan),無法看清楚屏(ping)幕上的(de)圖(tu)像和文字。如果是具有(you)(you)模式自動識別(bie)的(de)顯(xian)(xian)示器,有(you)(you)可能是黑屏(ping)狀態(tai),但這時(shi)面板下方指示燈為綠色。這時(shi)重(zhong)新啟動即(ji)可恢(hui)復(fu)。如果這種方法不(bu)行(xing),可以(yi)在(zai)(zai)把顯(xian)(xian)卡驅(qu)動程序刪除,然后(hou)在(zai)(zai)重(zhong)新安裝顯(xian)(xian)卡驅(qu)動即(ji)可。還有(you)(you)在(zai)(zai)顯(xian)(xian)卡顯(xian)(xian)存發生故障時(shi)會出現屏(ping)幕上固定位(wei)置顯(xian)(xian)示混亂(luan),而其他地方卻顯(xian)(xian)示正常。也有(you)(you)顯(xian)(xian)卡損壞造成花屏(ping)的(de)。