LED 藍光傷眼?美國能源局再提報告闢謠 - 螢幕

By Elvira
at 2015-10-27T15:09
at 2015-10-27T15:09
Table of Contents
新聞縮網址 http://goo.gl/UB2hSp
LED 發出的藍光究竟會否傷眼?這個問題一直以來深受國內外關注且爭議不斷。美國能源
局(Department of Energy,DOE)為破除大眾對 LED 藍光傷眼的迷思,曾在 2013 年所
發布的固態照明技術概要書中,就已提出相關資料論述。日前,DOE 又發布技術報告「
True Colors」,再度針對外界誤解,說明 LED 照明的安全性。
DOE 比較市面上經「商用 LED 產品評估報告」(Commercially Available LED Product
Evaluation and Reporting,CALiPER)測試的 20 款 LED 照明燈具,涵蓋了色溫(
Correlated Color Temperature,CCT)2,700 K 至 6,500 K、演色性(Color
Rendering Index,CRI)62 至 98 等範圍,藉以觀察 LED 燈具在不同 CCT 與 CRI 下的
光譜能量分布圖(Spectral Power Distribution,SPD)。
色溫可做為評量光源的指標,暖光色溫較低,冷光色溫較高;色溫愈高的照明燈具,其藍
光峰值也就愈明顯。根據光譜能量分布圖所示,色溫較高的白光 LED,其放射高峰值約在
450 nm 左右,同時也在波長 550 nm 到 650 nm 之間,呈現另一波峰值。DOE 表示,在
波長約 400 nm 到 480 nm 藍光區光線下「過度」曝露,會導致視網膜受損。
然而,DOE 強調這並不代表 LED 比其他傳統光源更易造成視力、藝術品等損害。當 LED
與傳統光源在同一色溫下,兩者的藍光含量其實相同。也就是說,LED 並沒有比傳統照明
來得傷眼,加上無紅外線或紫外線等有害光源,對人體所造成的危害也相對較小。而且依
照現行國際標準來看,白光 LED 並不具藍光危害(blue light hazard)的威脅。
DOE 也指出,近年來各地許多博物館,都相當注重 LED 或傳統照明等光源對文物、藝術
品的損害性,因此在選擇照明光源上相當審慎。目前已有愈來愈多博物館採用 LED 照明
,其實也間接證明 LED 照明對物品同樣不構成危害。
----
http://goo.gl/l3ENqm
原始報告PDF
還沒空細看,不過似乎是說LED與傳統螢光燈式發光體比較
在藍光區段,綜合考慮三種指標
Blue light hazard efficacy
CIE spectral damage potential
Melanopic flux
下,LED並沒有比較傷眼睛
(同亮度 同色溫下 傷害值沒比較高)
--
LED 發出的藍光究竟會否傷眼?這個問題一直以來深受國內外關注且爭議不斷。美國能源
局(Department of Energy,DOE)為破除大眾對 LED 藍光傷眼的迷思,曾在 2013 年所
發布的固態照明技術概要書中,就已提出相關資料論述。日前,DOE 又發布技術報告「
True Colors」,再度針對外界誤解,說明 LED 照明的安全性。
DOE 比較市面上經「商用 LED 產品評估報告」(Commercially Available LED Product
Evaluation and Reporting,CALiPER)測試的 20 款 LED 照明燈具,涵蓋了色溫(
Correlated Color Temperature,CCT)2,700 K 至 6,500 K、演色性(Color
Rendering Index,CRI)62 至 98 等範圍,藉以觀察 LED 燈具在不同 CCT 與 CRI 下的
光譜能量分布圖(Spectral Power Distribution,SPD)。
色溫可做為評量光源的指標,暖光色溫較低,冷光色溫較高;色溫愈高的照明燈具,其藍
光峰值也就愈明顯。根據光譜能量分布圖所示,色溫較高的白光 LED,其放射高峰值約在
450 nm 左右,同時也在波長 550 nm 到 650 nm 之間,呈現另一波峰值。DOE 表示,在
波長約 400 nm 到 480 nm 藍光區光線下「過度」曝露,會導致視網膜受損。
然而,DOE 強調這並不代表 LED 比其他傳統光源更易造成視力、藝術品等損害。當 LED
與傳統光源在同一色溫下,兩者的藍光含量其實相同。也就是說,LED 並沒有比傳統照明
來得傷眼,加上無紅外線或紫外線等有害光源,對人體所造成的危害也相對較小。而且依
照現行國際標準來看,白光 LED 並不具藍光危害(blue light hazard)的威脅。
DOE 也指出,近年來各地許多博物館,都相當注重 LED 或傳統照明等光源對文物、藝術
品的損害性,因此在選擇照明光源上相當審慎。目前已有愈來愈多博物館採用 LED 照明
,其實也間接證明 LED 照明對物品同樣不構成危害。
----
http://goo.gl/l3ENqm
原始報告PDF
還沒空細看,不過似乎是說LED與傳統螢光燈式發光體比較
在藍光區段,綜合考慮三種指標
Blue light hazard efficacy
CIE spectral damage potential
Melanopic flux
下,LED並沒有比較傷眼睛
(同亮度 同色溫下 傷害值沒比較高)
--
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