[討論] 關於WLED背光頻譜中的藍光波段是否傷眼

看板LCD作者web2312時間11年前 (2013/03/05 01:52)推噓11(11推 0噓 38→)

留言49則, 10人參與討論串1/11 (看更多)

關於版友近日在版上所提到的WLED背光頻譜中的藍光對眼睛的影響, 小弟寄了封信至螢幕評測網站PC Monitors(http://pcmonitors.info/ ) 詢問這個問題, ============================== 原PO ============================== Hello First of all, sorry for my bad english since I'm Taiwanese. There are some discussions in chinese monitor forum concerned about the sharp blue spike in the spectrum of W-LED backlights. http://pcmonitors.info/wp-content/uploads/2013/01/WLED-spectrum.png

http://pcmonitors.info/wp-content/uploads/2013/01/CCFL-spectrum.png

Could WLED-backlit monitors with the blue spike centered at 450mm cause more harm to eyes than CCFL backlighting monitors? Some users in our forum claimed that LED-backlit monitors can lead to serious eye strain and raise the possibility of cataract eye surgery after long term using. Therefore, they often suggest CCFL monitors to people who ask for an eye-caring monitor. Is this true? Thanks for reading! Eric Wang --------------------------------- 您好, 首先我來自台灣,英文可能有點怪請見諒. 華語電腦螢幕論壇中有一些關於W-LED背光頻譜藍光的討論與擔心, WLED背光中頻譜450mm波長附近的藍光強度相較CCFL是否會對眼睛產生更多傷害? 我們的論壇中,有一些使用者反應LED背光螢幕在長期使用下會導致眼睛不適與提升白內障的可能性.因此,他們建議想要護眼螢幕的人使用CCFL顯示器, 這是否正確呢? 感謝閱讀! ============================== PC Monitors ============================== Hi Eric, The peak of blue spectral energy for standard W-LED backlights is nothing to be concerned about. There is some research which I believe was done on post-op cataract patients and others without cataracts in their age group. The studies looked at their lifestyle and sun exposure. There was a relationship between the amount of time spent outside on bright days without any eye protection (sunglasses) and the occurrences of cataracts. This sort of highlights the importance of wearing sunglasses on bright days and days when radiation in general (UV levels) are high during the summer. It seems to have caused some misunderstanding and paranoia to spread in the monitor world, unfortunately. Although the amount of ‘blue energy’ emitted is greater on standard W-LED than on a standard gamut CCFL-backlit monitor it is absolutely miniscule compared to the levels of ‘blue energy’ you would be exposed to simply by going outside (even on a relatively dull day). Blue light is actually one of the signals our body uses to know when it is daytime and to keep us alert during such times. It’s why some people suffer from S.A.D (Seasonal Affective Disorder) during bleak winter days and why they can benefit from special lamps that emit very strong blue-spectrum light. This is much stronger than you’d see on any W-LED monitor – and you’d never see a doctor advising patients with S.A.D to stare at their LED-backlit PC monitor for relief. Hope this clears some things up, Adam Simmons pcmonitors.info admin --------------------------------- 您好, 標準W-LED背光中的尖峰藍光光譜能量沒有必要擔心. 有一些我信任的研究,他們以兩組同樣年齡範圍內的手術後白內障病人與無任何白內障者對照.這個論文檢視了他們的生活方式與陽光曝曬情形,發現他們在天氣晴朗的白天不戴任何護眼裝置(太陽眼鏡)外出的時間與白內障的發生有關聯,某種程度上說明了在大白天與UV輻射指數普遍偏高的夏日外出時,戴太陽眼鏡的重要性. 很不幸的這似乎在螢幕領域造成一些誤解與幻想.儘管標準W-LED上所發出的"藍光能量" 要比標準色域CCFL背光螢幕強,但這與你僅僅簡單的走出戶外(就算是相對陰暗的日子) 所曝曬到的"藍光能量"等級比較起來可以說是絕對的微小.藍光實際上是我們身體了解什麼時候是白天,並使我們在那樣的時段保持警戒的信號,這也是為什麼有一些人會在陰冷的冬天出現S.A.D(季節性情緒失調),也是為什麼他們可以透過發出非常強藍光頻譜光線的特殊照明改善症狀, 這遠比你能看到的任何W-LED顯示器要強的多 - 並且你永遠不會看到有S.A.D症狀的病人被醫生囑咐要盯著他們的LED背光電腦螢幕緩和症狀. 希望這可以解除一些疑惑 Adam Simmons pcmonitors.info 管理人 ================================== 以上是信件的內容,內容的公開已獲得管理人同意, 另外管理人請我後續到他們的論壇發這個問題,他說他們站上的人應該也會感興趣xd 以上供參考,版友有什麼想法的話歡迎一起討論囉@@ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.32.133.33

推

qazijn

03/05 02:06, , 1^F

03/05 02:06, 1^F

→

web2312

03/05 02:21, , 2^F

03/05 02:21, 2^F

補充PC monitors論壇上的管理人回文 http://tinyurl.com/d4o7s6l 簡短來說,標準W-LED背光的尖峰光譜能量不需要擔心.值得記住的是標準W-LED背光發出的藍光能量確實較高的同時,顯示器會過濾這個光來產生各種顏色,就算當W-LED 顯示器顯示純白時,也常常使用一個藍色的過濾片來補正光譜中尖銳的藍光波段. 當顯示除了藍色以外的顏色時,藍光會降的更多.如同文章中提到的 (指http://pcmonitors.info/articles/the-evolution-of-led-backlights) 過濾片的效率並不是100%,並且經過濾後仍會有光譜差距,儘管如此,你所實際曝曬到的藍色區域中HEVL(高能量可見光-波長380~500mm)能量的差別也不需要擔心. ... 雖然說了以上,但我仍建議使用任何顯示器的使用者使用合理的亮度 (200 cd/m2應該對大部分的環境很足夠了),並且盡可能的在可休息時休息. 同時我也建議在夜間時,使用如F.lux軟體來降低藍光強度,這麼做真的不是特別要避免對視力健康的各種恐怖影響,僅僅是幫助減輕眼睛疲勞,並且幫助取得可平穩休息的夜間睡眠. ※ 編輯: web2312 來自: 114.32.133.33 (03/05 02:53)

推

iso5972

03/05 07:32, , 3^F

03/05 07:32, 3^F

推

greenpeace21

03/05 10:25, , 4^F

03/05 10:25, 4^F

→

SUCKERKING

03/05 11:50, , 5^F

03/05 11:50, 5^F