LED 藍光問題的相關文章 - 螢幕

By Kumar
at 2013-10-06T09:13
at 2013-10-06T09:13
Table of Contents
藍光問題學術文獻,請參考:#1HI8xpC0
因我非醫學背景,因此在那篇文章中只提供出文獻彙整,無法進一步解釋實驗內容。
總之,那些文獻跟本文的豐富資料,都圍繞著LED藍光傷眼問題打轉。
又來講一些不中聽的話了。最近爬到一篇好文,談到LED藍光問題。
http://electronmania.blogspot.tw/2013/05/led.html
以下是引文:
-------
視覺與味覺一樣,都是感官受體與大腦交互作用後的「感知」。
像「糖」會讓舌頭與大腦有「甜」的感覺;而「全光譜」的太陽光讓眼球與大腦有「白」
的感覺。眼球與大腦對「白色」的感知可以來自全光譜,也可以來自紅、綠、藍三種波長
的混合,甚至只要一對互補色,例如藍和黃。
不是糖的「糖精、甜精」一樣可以讓舌頭與大腦有「甜」的感覺;不是 「全光譜」的人
工光源一樣可以讓眼球與大腦有「白」的感覺。如果「糖精、甜精」可以說是「假糖」,
我就不知道可不可以用「假白光」來形容目前的一些人工白色光源。
人工白色光源主要運用在「照明」與「顯示器背光源」兩大領域。
而目前的白色光源又以 LED 最夯,所以我們就來多認識一下白光 LED 的光譜?
LED 的發展從紅光、黃光、綠光一路挺進到藍光、紫外光。
而白光則是首度由日本人以「藍光LED加螢光粉」的技術來克服,它以藍光LED讓螢光粉產
生黃光來讓眼睛「感覺」看到白光。「藍光LED加螢光粉」的技術也是目前白光LED(WLED)
的主流,最大優點就是便宜。而螢光粉的配方則持續還在發展中。
--------------------
文章中有各式各樣的產品的發光光譜圖:Macbook, iPhone, iPad, Nexus, New iPad,
Kindle Fire HD(這不是電子書,而是不折不扣標準平板),並對光譜做出詳細介紹。
大家不妨看看。這邊另有一篇文章,是別人去測量各種光源的圖:http://ppt.cc/xb5S
LED 問題最近在新聞版面都不缺席,最近近期的LED殘害眼睛新聞大彙整:
日盯3C螢幕逾16小時 19歲男罹白內障 http://ppt.cc/DXWk
睡前關燈滑手機 強光燒壞眼睛 http://ppt.cc/KbuC
手機看「蘭陵王」 熟女老花激增 http://ppt.cc/oyhk (重點在裡面提到的藍光)
LED燈傷眼或致盲 http://ppt.cc/0e5C
討論區有人證明led燈害生物致盲 http://ppt.cc/fT83
戴濾藍光鏡片 防3C傷眼 http://ppt.cc/Tek9
(10/16發現更新)瞎 玩手機過頭 3高中生傷眼 http://ppt.cc/AZgy
說到濾藍光,不少板友也在問。
最近台灣市面上驟升到近十幾家廠商有賣濾藍光鏡片,像是雨後春筍,商機之高可見。
早期呢,只有gunnar有賣,有度數濾藍光鏡片要上萬,且得從美國訂作回來,
價格甚高、選擇之少,gunnar現在應該算被台灣市場淘汰了。
現在廠商百家爭鳴,搶這塊大餅,選擇相當多,價格平均2~3k以內(跟過濾%數等有關),
也可以配戴有度數的(價錢不會高到哪裡去)。
智慧型手機螢幕保護貼,也一大堆濾藍光的,像在買手機殼一樣普及,
不少店面都有,隨便google,都搜得到。譬如這是一個pchome在賣的iphone濾藍光
保護貼,可過濾到四五十趴的藍光:http://ppt.cc/GyBj
不過這都是治標,如果廠商不要生產LED背光螢幕,
消費者就不會那麼囉嗦了。苦心焦思,到處去搞濾藍光花招,都是捨本逐末阿。
有個人就跑去ASUS意見論壇開砲:(http://ppt.cc/~0I~)
「LED背光希望你們能夠不要再用PWM的技術,至少就我個
人絕對不會買LED背光使用PWM技術的螢幕。加個一萬塊去買好螢幕都比以後付眼睛的醫
藥費來的實際。」
「希望你們能研究一下(led藍光)到底有沒有問題,有問題就改掉,
也能夠當作產品的賣點。」
最後有個好消息。5k以內在台灣其實還買得到CCFL背光螢幕,
如果你不在乎VA/IPS的享受,只在乎護眼,可以考慮(CCFL+TN):http://ppt.cc/~bR1
--
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