本論文提出一個於家庭觀賞平面電視時，此符合人體工學之顯示系統能夠依據使用者觀看的環境光照度，對環境執行亮度補償的新概念。通常於環境照度較亮的客廳或室內觀看電視時，呈現出的影像內容會失去暗部細節部份，鮮豔度降低且有眩光效應，使得影像較無層次感、對比度不足。相反地，於較暗的環境下觀賞電視，雖影像之色彩較鮮豔，但環境亮度與螢幕亮度則形成強烈的亮度對比，使得觀賞者於觀看電視時眼睛易感到不適。
根據先前研究指出，當環境光較亮時，影像亮度需調得較亮，若環境光較暗時，影像亮度則調暗，但這些皆需調節顯示器面板背光源亮度。為了使人眼能夠舒適的觀賞平面電視，本研究建立『環境光補償單元』(Ambient Light Compensation Unit, ALCU)模組，以不改變顯示器面板內背光源亮度為目的，利用白光發光二極體 (Lighting Emission Diode, LED) 做為亮度補償元件，將LEDs建置於顯示器面板外之背後四周，形成環境光補償用途之環繞光，評估人眼對於不同環境條件下所能容忍的亮度補償範圍，達到保護眼睛的作用並建立視覺疲勞感的建議指標。

We propose the display system that can compensate the luminance for surrounding when watching TV. In general, the image contents tend to lose shadow details and reduce the colorfulness when they are viewed in a bright room. On the contrary, the image appearances with vividness, but stronger contrast on TV screen make the viewer’s eyes feel tired in a dimmer room.
From perivous research, it is known that the perceived image luminance will increase as the surrounding is brighter. When the surrounding becomes dimmer, the perceived image luminance will decrease. We establish the “Ambient Light Compensation Unit” (ALCU) module that the backlight luminance of display don’t be modulated, the luminance compensating components are set up the back of TV device to produce ambient light by LEDs. Next, evaluate the upper and lower ranges that visual tolerance thresholds of LEDs luminance compensation for variable surrounding factors. We expect that this research will alleviate the eye fatigue.

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