使用LCD,務必作好接地。 - 螢幕
By Elizabeth
at 2008-03-01T16:48
at 2008-03-01T16:48
Table of Contents
對於一般電腦使用者而言,使用電腦時最接近頭部的設備,就是顯示螢幕。
而現今許多LCD是將變壓器直接設置在顯示幕後,而較好的高階顯示器更是
在螢幕後面還有許多控制電路。雖然LCD面板本身是低輻射,但現今附於面
板後方的電子電路仍會散發電磁輻射。降低電磁輻射強度的方法,是使用
金屬遮罩並使之接地。所以使用LCD務必要作好接地,尤其是高階LCD更是必
要。高階LCD大多通過了TCO的防輻射安全標準,但這是在確實作好接地的狀
況下所做的測試。有些品牌LCD的背面會有警告文字,要求使用者必需切實作好
接地,否則就會有使用上的危險,不是沒有原因的!台灣因為老舊房舍通常
並未有真正接地的三孔電源插座,所以使用者必須要自行小心。
現今小尺寸的廉價LCD,往往變壓器外接,控制電路簡單,面板耗電少,反而輻射較輕。
現今大尺寸的高階LCD,往往變壓器內置,控制電路繁複,面板耗電大,反而輻射較重。
但高階LCD會有一些方法來降低輻射以符合安規,但這些方法都要電源接地才會有效。
所以使用高階大尺寸LCD,務必要作好接地,以維護個人健康。
使用LCD,最好距離螢幕有30cm以上的距離,因為輻射量會隨距離急劇衰減。
以上是個人最近選購LCD的心得,不敢說一定正確,謹提供大家參考。
會發這篇文章,是因為自己最近在選購LCD時,感覺到近來LCD有些輻射問題。
所以提醒大家要自行多注意一下!
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