yric 发表于 9-7-2013 11:16 PM 
其实没什么formula. 先量sofa和摆放tv的距离，再上谷歌找“led tv size and viewing distance” 后断定大 ...
感谢分享。我谷歌了。看到thx的推荐观赏距离-42吋fullHD的话，就是42吋/0.84=4.66尺。那么说你的观赏距离是4尺半？如果你的距离还是有6尺的话，我想50吋会好点（42吋的价钱好像比较不值，可以用每寸价格来做比较看看）。因为很多电影的格式是2.35：1 ，即使在50吋的电视看，上下黑边也是很大的，那么画面就更小了。
Diagonal measurement × 1.2 (corresponding to 40-degree viewing angle)[edit]THX recommends that the “best seat-to-screen distance” is one where the view angle approximates 40 degrees, [25] (the actual angle is 40.04 degrees). [3] Their recommendation was originally presented at the 2006 CES show, and was stated as being the theoretical maximum horizontal view angle, based on average human vision. [26] In the opinion of THX the location where the display is viewed at a 40 degree view angle provides the most “immersive cinematic experience”, [25] all other things considered. For consumer application of their recommendations, THX recommends dividing the diagonal screen measurement by .84 to calculate the optimum viewing distance, for a 1080p resolution. This equates to multiplying the diagonal measurement with about 1.2. [25]
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