顯(xian)(xian)示(shi)屏的(de)(de)亮度(du)(du):要(yao)(yao)(yao)在一個環境中正確(que)的(de)(de)顯(xian)(xian)示(shi)信息,要(yao)(yao)(yao)有(you)足夠的(de)(de)亮度(du)(du)以(yi)圖像(xiang)的(de)(de)實際對比度(du)(du),尤(you)其(qi)是(shi)用(yong)(yong)在戶(hu)外環境條件(jian)惡劣的(de)(de)戶(hu)外LED顯(xian)(xian)示(shi)屏。所以(yi),根(gen)據(ju)使(shi)用(yong)(yong)環境的(de)(de)不同顯(xian)(xian)示(shi)屏要(yao)(yao)(yao)有(you)相應(ying)的(de)(de)亮度(du)(du)來。顯(xian)(xian)示(shi)屏投入使(shi)用(yong)(yong)后,做為發(fa)光源的(de)(de)LED管(guan)的(de)(de)亮度(du)(du)就開始衰減,所以(yi)亮度(du)(du)衰減的(de)(de)速率是(shi)LED顯(xian)(xian)示(shi)屏的(de)(de)重要(yao)(yao)(yao)性能之一。
場(chang)(chang)(chang)掃(sao)描(miao)電(dian)(dian)路(lu):包括(kuo)場(chang)(chang)(chang)振蕩(dang)和(he)場(chang)(chang)(chang)輸出兩部分。場(chang)(chang)(chang)振蕩(dang)電(dian)(dian)路(lu)在同(tong)步信號下(xia),形(xing)(xing)成場(chang)(chang)(chang)頻鋸(ju)齒波,鋸(ju)齒波再由場(chang)(chang)(chang)輸出電(dian)(dian)路(lu)功(gong)率放(fang)大后加至場(chang)(chang)(chang)偏轉線(xian)圈,形(xing)(xing)成掃(sao)描(miao)電(dian)(dian)流,使電(dian)(dian)子槍發(fa)射出的(de)電(dian)(dian)子上下(xia)拉(la)開。場(chang)(chang)(chang)幅和(he)場(chang)(chang)(chang)中心調節的(de)功(gong)能也(ye)是在場(chang)(chang)(chang)掃(sao)描(miao)電(dian)(dian)路(lu)中實現的(de),此外還輸出場(chang)(chang)(chang)頻鋸(ju)齒波到(dao)枕形(xing)(xing)校正電(dian)(dian)路(lu),以(yi)校正水平枕形(xing)(xing)失真。
LCD顯示(shi)器(qi)(qi)即液晶顯示(shi)器(qi)(qi)。它(ta)的(de)(de)(de)優點有(you)(you)機(ji)身薄、占地小和(he)輻射小。LCD顯示(shi)器(qi)(qi)內部有(you)(you)很多液晶粒(li)子,它(ta)們有(you)(you)規律地排列(lie)成(cheng)一定(ding)的(de)(de)(de)形(xing)狀(zhuang),并且(qie)它(ta)們每一面的(de)(de)(de)顏(yan)(yan)色(se)(se)(se)(se)都不(bu)(bu)(bu)同(tong),分為紅色(se)(se)(se)(se)、綠色(se)(se)(se)(se)和(he)藍色(se)(se)(se)(se)。這三原色(se)(se)(se)(se)能還原成(cheng)任意的(de)(de)(de)其他顏(yan)(yan)色(se)(se)(se)(se)。當(dang)顯示(shi)器(qi)(qi)收到顯示(shi)數據時,會(hui)控制每個液晶粒(li)子轉動(dong)到不(bu)(bu)(bu)同(tong)顏(yan)(yan)色(se)(se)(se)(se)的(de)(de)(de)面,從而組合(he)成(cheng)不(bu)(bu)(bu)同(tong)的(de)(de)(de)顏(yan)(yan)色(se)(se)(se)(se)和(he)圖(tu)像。也因為這樣,LCD顯示(shi)器(qi)(qi)的(de)(de)(de)缺點有(you)(you)色(se)(se)(se)(se)彩不(bu)(bu)(bu)夠(gou)艷(yan)和(he)可(ke)視角度不(bu)(bu)(bu)大等。
LED顯示(shi)器(qi)集微電子技(ji)術(shu)、計(ji)算機技(ji)術(shu)、信息處(chu)理(li)技(ji)術(shu)于(yu)一(yi)體(ti),以(yi)其色彩(cai)鮮艷、動態范圍廣、亮度高、壽命長、工(gong)作穩定可(ke)靠(kao)等(deng)優點,成為具優勢的新(xin)一(yi)代(dai)顯示(shi)設(she)備。目前,LED顯示(shi)器(qi)已廣泛應用(yong)于(yu)大(da)型(xing)廣場、體(ti)育場館(guan)、證券(quan)交(jiao)易大(da)廳等(deng)場所,可(ke)以(yi)滿足不同環(huan)境的需要。
一般濕(shi)度(du)保持在30%-80%之(zhi)間(jian),顯(xian)示(shi)器(qi)(qi)(qi)都能正常工作(zuo),但一旦(dan)室內(nei)(nei)(nei)濕(shi)度(du)高(gao)于80%后(hou),顯(xian)示(shi)器(qi)(qi)(qi)內(nei)(nei)(nei)部就會產(chan)生(sheng)(sheng)結露現象。其內(nei)(nei)(nei)部的電源變壓器(qi)(qi)(qi)和其他線(xian)圈受(shou)潮(chao)后(hou)也易(yi)產(chan)生(sheng)(sheng)漏電,甚至有可能造成連線(xian)短路;而顯(xian)示(shi)器(qi)(qi)(qi)的高(gao)壓部位則極(ji)易(yi)產(chan)生(sheng)(sheng)放電現象;機內(nei)(nei)(nei)元器(qi)(qi)(qi)件容易(yi)生(sheng)(sheng)銹、腐蝕,嚴重時(shi)會使電路板(ban)發生(sheng)(sheng)短路。因此,LCD顯(xian)示(shi)器(qi)(qi)(qi)注意防(fang)潮(chao),長(chang)時(shi)間(jian)不用的顯(xian)示(shi)器(qi)(qi)(qi),可以定期通電工作(zuo)一段時(shi)間(jian),讓顯(xian)示(shi)器(qi)(qi)(qi)工作(zuo)時(shi)產(chan)生(sheng)(sheng)的熱量將機內(nei)(nei)(nei)的潮(chao)氣(qi)驅趕出(chu)去(qu)。
花屏通常是由于顯(xian)(xian)(xian)(xian)示(shi)器不支(zhi)持主機送(song)來的(de)(de)顯(xian)(xian)(xian)(xian)示(shi)模(mo)式,往往是高于顯(xian)(xian)(xian)(xian)示(shi)器的(de)(de)顯(xian)(xian)(xian)(xian)示(shi)模(mo)式,引(yin)起屏幕的(de)(de)圖像混(hun)亂(luan),無法看(kan)清楚屏幕上的(de)(de)圖像和文字。如(ru)果(guo)是具有模(mo)式自動識別(bie)的(de)(de)顯(xian)(xian)(xian)(xian)示(shi)器,有可能是黑屏狀態,但這(zhe)時(shi)(shi)面板下方指(zhi)示(shi)燈(deng)為綠(lv)色(se)。這(zhe)時(shi)(shi)重(zhong)(zhong)新(xin)啟動即可恢復。如(ru)果(guo)這(zhe)種方法不行,可以(yi)在(zai)把顯(xian)(xian)(xian)(xian)卡(ka)驅(qu)動程(cheng)序刪除,然(ran)后在(zai)重(zhong)(zhong)新(xin)安裝顯(xian)(xian)(xian)(xian)卡(ka)驅(qu)動即可。還有在(zai)顯(xian)(xian)(xian)(xian)卡(ka)顯(xian)(xian)(xian)(xian)存發生故障時(shi)(shi)會出(chu)現屏幕上固定(ding)位置顯(xian)(xian)(xian)(xian)示(shi)混(hun)亂(luan),而(er)其他地方卻顯(xian)(xian)(xian)(xian)示(shi)正常。也(ye)有顯(xian)(xian)(xian)(xian)卡(ka)損壞造成花屏的(de)(de)。