顯(xian)(xian)示(shi)屏(ping)的(de)(de)(de)亮(liang)度(du):要在(zai)一個環(huan)境中正確的(de)(de)(de)顯(xian)(xian)示(shi)信息,要有足(zu)夠的(de)(de)(de)亮(liang)度(du)以圖(tu)像的(de)(de)(de)實(shi)際對比度(du),尤其是用(yong)在(zai)戶外(wai)環(huan)境條件惡(e)劣的(de)(de)(de)戶外(wai)LED顯(xian)(xian)示(shi)屏(ping)。所(suo)(suo)以,根據使用(yong)環(huan)境的(de)(de)(de)不同顯(xian)(xian)示(shi)屏(ping)要有相應的(de)(de)(de)亮(liang)度(du)來。顯(xian)(xian)示(shi)屏(ping)投(tou)入(ru)使用(yong)后,做為(wei)發光源(yuan)的(de)(de)(de)LED管的(de)(de)(de)亮(liang)度(du)就開始衰(shuai)減,所(suo)(suo)以亮(liang)度(du)衰(shuai)減的(de)(de)(de)速(su)率是LED顯(xian)(xian)示(shi)屏(ping)的(de)(de)(de)重要性能之一。
場(chang)(chang)(chang)(chang)掃(sao)描(miao)(miao)電(dian)路(lu)(lu)(lu):包(bao)括場(chang)(chang)(chang)(chang)振(zhen)蕩和場(chang)(chang)(chang)(chang)輸出兩部(bu)分。場(chang)(chang)(chang)(chang)振(zhen)蕩電(dian)路(lu)(lu)(lu)在同步信(xin)號(hao)下(xia)(xia),形成(cheng)場(chang)(chang)(chang)(chang)頻(pin)鋸齒(chi)波(bo),鋸齒(chi)波(bo)再由場(chang)(chang)(chang)(chang)輸出電(dian)路(lu)(lu)(lu)功率放(fang)大后加至(zhi)場(chang)(chang)(chang)(chang)偏轉線圈(quan),形成(cheng)掃(sao)描(miao)(miao)電(dian)流(liu),使電(dian)子(zi)槍發射出的(de)電(dian)子(zi)上(shang)下(xia)(xia)拉開。場(chang)(chang)(chang)(chang)幅和場(chang)(chang)(chang)(chang)中心調節的(de)功能也是在場(chang)(chang)(chang)(chang)掃(sao)描(miao)(miao)電(dian)路(lu)(lu)(lu)中實(shi)現的(de),此(ci)外還輸出場(chang)(chang)(chang)(chang)頻(pin)鋸齒(chi)波(bo)到(dao)枕(zhen)(zhen)形校正電(dian)路(lu)(lu)(lu),以校正水平枕(zhen)(zhen)形失真(zhen)。
LCD顯(xian)示(shi)(shi)(shi)(shi)器即(ji)液晶(jing)(jing)顯(xian)示(shi)(shi)(shi)(shi)器。它(ta)的(de)(de)優(you)點有(you)機(ji)身(shen)薄、占地小和輻射小。LCD顯(xian)示(shi)(shi)(shi)(shi)器內部有(you)很多(duo)液晶(jing)(jing)粒子,它(ta)們有(you)規律地排(pai)列成(cheng)一定的(de)(de)形(xing)狀,并(bing)且它(ta)們每一面的(de)(de)顏色(se)(se)(se)都不同(tong)(tong)(tong),分為紅色(se)(se)(se)、綠色(se)(se)(se)和藍色(se)(se)(se)。這(zhe)三原色(se)(se)(se)能還原成(cheng)任意的(de)(de)其他顏色(se)(se)(se)。當顯(xian)示(shi)(shi)(shi)(shi)器收到(dao)顯(xian)示(shi)(shi)(shi)(shi)數據(ju)時,會控(kong)制(zhi)每個液晶(jing)(jing)粒子轉(zhuan)動(dong)到(dao)不同(tong)(tong)(tong)顏色(se)(se)(se)的(de)(de)面,從(cong)而組合(he)成(cheng)不同(tong)(tong)(tong)的(de)(de)顏色(se)(se)(se)和圖像。也因為這(zhe)樣,LCD顯(xian)示(shi)(shi)(shi)(shi)器的(de)(de)缺點有(you)色(se)(se)(se)彩不夠艷和可視(shi)角度不大(da)等。
LED顯示(shi)器(qi)(qi)集(ji)微(wei)電子技(ji)術、計算機技(ji)術、信息處理技(ji)術于(yu)一體(ti),以其色彩鮮艷、動態范圍廣、亮度高、壽命長、工作(zuo)穩定(ding)可(ke)靠等優點(dian),成為具優勢的新一代顯示(shi)設備。目前,LED顯示(shi)器(qi)(qi)已(yi)廣泛應用于(yu)大(da)型廣場(chang)(chang)(chang)、體(ti)育場(chang)(chang)(chang)館(guan)、證券交易大(da)廳等場(chang)(chang)(chang)所,可(ke)以滿(man)足不同環境的需要(yao)。
一般濕度(du)保持在30%-80%之間,顯(xian)(xian)示(shi)器(qi)(qi)都能正常工作(zuo)(zuo),但一旦室內濕度(du)高于80%后,顯(xian)(xian)示(shi)器(qi)(qi)內部(bu)(bu)就會(hui)產(chan)(chan)生(sheng)(sheng)結露現象(xiang)。其內部(bu)(bu)的(de)電(dian)源變壓(ya)(ya)器(qi)(qi)和其他線(xian)圈受潮后也易產(chan)(chan)生(sheng)(sheng)漏電(dian),甚至(zhi)有(you)可能造成(cheng)連線(xian)短路;而顯(xian)(xian)示(shi)器(qi)(qi)的(de)高壓(ya)(ya)部(bu)(bu)位則極易產(chan)(chan)生(sheng)(sheng)放(fang)電(dian)現象(xiang);機(ji)內元器(qi)(qi)件容易生(sheng)(sheng)銹、腐蝕,嚴重時(shi)會(hui)使電(dian)路板(ban)發生(sheng)(sheng)短路。因此,LCD顯(xian)(xian)示(shi)器(qi)(qi)注意(yi)防潮,長時(shi)間不用的(de)顯(xian)(xian)示(shi)器(qi)(qi),可以定期通(tong)電(dian)工作(zuo)(zuo)一段(duan)時(shi)間,讓顯(xian)(xian)示(shi)器(qi)(qi)工作(zuo)(zuo)時(shi)產(chan)(chan)生(sheng)(sheng)的(de)熱量將機(ji)內的(de)潮氣驅趕出去。
花(hua)屏通常(chang)(chang)是由于(yu)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)(qi)不支(zhi)持(chi)主機送來的(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)模(mo)式,往(wang)(wang)往(wang)(wang)是高于(yu)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)(qi)的(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)模(mo)式,引起屏幕的(de)圖(tu)(tu)像混亂,無法看清楚屏幕上的(de)圖(tu)(tu)像和文字(zi)。如(ru)(ru)果是具有(you)模(mo)式自動(dong)識別的(de)顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)器(qi)(qi)(qi),有(you)可(ke)能(neng)是黑屏狀態(tai),但這時面板下方(fang)指示(shi)(shi)(shi)(shi)燈為綠色。這時重(zhong)新(xin)啟(qi)動(dong)即可(ke)恢復。如(ru)(ru)果這種方(fang)法不行,可(ke)以在把顯(xian)(xian)(xian)卡驅動(dong)程序刪除,然后在重(zhong)新(xin)安裝(zhuang)顯(xian)(xian)(xian)卡驅動(dong)即可(ke)。還有(you)在顯(xian)(xian)(xian)卡顯(xian)(xian)(xian)存發(fa)生故障時會出現屏幕上固(gu)定位置顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)混亂,而其他地方(fang)卻顯(xian)(xian)(xian)示(shi)(shi)(shi)(shi)正常(chang)(chang)。也(ye)有(you)顯(xian)(xian)(xian)卡損壞造成(cheng)花(hua)屏的(de)。