顯(xian)(xian)示屏(ping)的(de)亮度:要(yao)在一個環(huan)境中正確(que)的(de)顯(xian)(xian)示信息,要(yao)有足夠的(de)亮度以圖像(xiang)的(de)實際對比度,尤其是用在戶外環(huan)境條件惡劣(lie)的(de)戶外LED顯(xian)(xian)示屏(ping)。所以,根據使用環(huan)境的(de)不同(tong)顯(xian)(xian)示屏(ping)要(yao)有相應的(de)亮度來。顯(xian)(xian)示屏(ping)投入使用后,做為發光源(yuan)的(de)LED管的(de)亮度就開始衰減,所以亮度衰減的(de)速率是LED顯(xian)(xian)示屏(ping)的(de)重(zhong)要(yao)性能(neng)之一。
場(chang)(chang)掃(sao)(sao)描電(dian)(dian)路(lu):包括場(chang)(chang)振蕩和(he)場(chang)(chang)輸(shu)出(chu)兩部分。場(chang)(chang)振蕩電(dian)(dian)路(lu)在同步信號(hao)下(xia),形(xing)(xing)成場(chang)(chang)頻(pin)鋸齒波(bo),鋸齒波(bo)再由場(chang)(chang)輸(shu)出(chu)電(dian)(dian)路(lu)功(gong)率放大后加至場(chang)(chang)偏(pian)轉(zhuan)線圈,形(xing)(xing)成掃(sao)(sao)描電(dian)(dian)流,使電(dian)(dian)子(zi)槍(qiang)發射出(chu)的電(dian)(dian)子(zi)上下(xia)拉開。場(chang)(chang)幅(fu)和(he)場(chang)(chang)中心調(diao)節的功(gong)能(neng)也(ye)是在場(chang)(chang)掃(sao)(sao)描電(dian)(dian)路(lu)中實現的,此外還輸(shu)出(chu)場(chang)(chang)頻(pin)鋸齒波(bo)到枕形(xing)(xing)校(xiao)正電(dian)(dian)路(lu),以校(xiao)正水平枕形(xing)(xing)失真(zhen)。
LCD顯(xian)(xian)(xian)(xian)示器(qi)(qi)即液(ye)晶(jing)顯(xian)(xian)(xian)(xian)示器(qi)(qi)。它的(de)(de)優點有(you)機身薄、占地小(xiao)和(he)輻射小(xiao)。LCD顯(xian)(xian)(xian)(xian)示器(qi)(qi)內部有(you)很(hen)多液(ye)晶(jing)粒(li)子(zi),它們有(you)規(gui)律地排列成(cheng)一定的(de)(de)形(xing)狀(zhuang),并且(qie)它們每一面的(de)(de)顏(yan)色(se)(se)都不(bu)同,分為紅(hong)色(se)(se)、綠色(se)(se)和(he)藍色(se)(se)。這三原色(se)(se)能還(huan)原成(cheng)任意的(de)(de)其他顏(yan)色(se)(se)。當顯(xian)(xian)(xian)(xian)示器(qi)(qi)收到(dao)(dao)顯(xian)(xian)(xian)(xian)示數據時,會控(kong)制每個液(ye)晶(jing)粒(li)子(zi)轉動到(dao)(dao)不(bu)同顏(yan)色(se)(se)的(de)(de)面,從(cong)而組合成(cheng)不(bu)同的(de)(de)顏(yan)色(se)(se)和(he)圖像。也因為這樣(yang),LCD顯(xian)(xian)(xian)(xian)示器(qi)(qi)的(de)(de)缺點有(you)色(se)(se)彩不(bu)夠艷和(he)可視角度不(bu)大等。
LED顯(xian)示器集微電子技術(shu)、計(ji)算機技術(shu)、信息處理技術(shu)于一體,以(yi)其(qi)色彩鮮艷(yan)、動態范圍廣(guang)、亮度高、壽(shou)命(ming)長、工作穩定可(ke)(ke)靠等(deng)優點,成(cheng)為具優勢(shi)的(de)新一代顯(xian)示設備。目前,LED顯(xian)示器已(yi)廣(guang)泛應用于大(da)型廣(guang)場、體育場館、證券交易大(da)廳(ting)等(deng)場所,可(ke)(ke)以(yi)滿足(zu)不同環境(jing)的(de)需要。
一(yi)(yi)(yi)般濕(shi)(shi)度保持(chi)在(zai)30%-80%之間,顯(xian)示(shi)器(qi)(qi)(qi)(qi)都能正常工(gong)作,但一(yi)(yi)(yi)旦室(shi)內(nei)濕(shi)(shi)度高于80%后(hou),顯(xian)示(shi)器(qi)(qi)(qi)(qi)內(nei)部(bu)就會產(chan)生(sheng)(sheng)(sheng)結(jie)露現象。其(qi)內(nei)部(bu)的電(dian)源變壓器(qi)(qi)(qi)(qi)和其(qi)他線圈受(shou)潮后(hou)也易(yi)(yi)產(chan)生(sheng)(sheng)(sheng)漏(lou)電(dian),甚(shen)至有可能造成連線短(duan)路;而顯(xian)示(shi)器(qi)(qi)(qi)(qi)的高壓部(bu)位則極易(yi)(yi)產(chan)生(sheng)(sheng)(sheng)放電(dian)現象;機(ji)內(nei)元器(qi)(qi)(qi)(qi)件容(rong)易(yi)(yi)生(sheng)(sheng)(sheng)銹、腐(fu)蝕,嚴重(zhong)時(shi)會使電(dian)路板發生(sheng)(sheng)(sheng)短(duan)路。因此,LCD顯(xian)示(shi)器(qi)(qi)(qi)(qi)注意防潮,長(chang)時(shi)間不用的顯(xian)示(shi)器(qi)(qi)(qi)(qi),可以定期(qi)通電(dian)工(gong)作一(yi)(yi)(yi)段(duan)時(shi)間,讓顯(xian)示(shi)器(qi)(qi)(qi)(qi)工(gong)作時(shi)產(chan)生(sheng)(sheng)(sheng)的熱量將機(ji)內(nei)的潮氣驅趕出去。
花屏(ping)通常(chang)是由于顯(xian)(xian)(xian)示(shi)(shi)器不支(zhi)持主機(ji)送(song)來(lai)的(de)顯(xian)(xian)(xian)示(shi)(shi)模式(shi)(shi),往往是高(gao)于顯(xian)(xian)(xian)示(shi)(shi)器的(de)顯(xian)(xian)(xian)示(shi)(shi)模式(shi)(shi),引起屏(ping)幕(mu)的(de)圖像混亂,無法看清楚(chu)屏(ping)幕(mu)上(shang)的(de)圖像和文(wen)字。如(ru)果是具(ju)有(you)(you)模式(shi)(shi)自動(dong)識別的(de)顯(xian)(xian)(xian)示(shi)(shi)器,有(you)(you)可(ke)能(neng)是黑(hei)屏(ping)狀態(tai),但(dan)這時(shi)(shi)面板下方(fang)指示(shi)(shi)燈為綠色。這時(shi)(shi)重新(xin)啟動(dong)即可(ke)恢(hui)復。如(ru)果這種方(fang)法不行,可(ke)以在(zai)把顯(xian)(xian)(xian)卡驅(qu)動(dong)程序刪(shan)除,然后在(zai)重新(xin)安(an)裝顯(xian)(xian)(xian)卡驅(qu)動(dong)即可(ke)。還有(you)(you)在(zai)顯(xian)(xian)(xian)卡顯(xian)(xian)(xian)存發(fa)生故障時(shi)(shi)會出現(xian)屏(ping)幕(mu)上(shang)固定位置(zhi)顯(xian)(xian)(xian)示(shi)(shi)混亂,而其他地方(fang)卻顯(xian)(xian)(xian)示(shi)(shi)正(zheng)常(chang)。也有(you)(you)顯(xian)(xian)(xian)卡損壞(huai)造成(cheng)花屏(ping)的(de)。