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既然现在流行走技术流,那咱也赶个时髦!
What’s That Green Trail On My Plasma?
When talking about plasma TV, the 2 top concerns for potential buyers are plasma screen burn and excessive glass reflection. While the former can be prevented through judicious use and the latter via ambient light control, there is one other little-known flaw that is inherent in the plasma display technology – phosphor trails.
Pay close attention to the white bars. As they move faster and faster across the screen, you’ll notice that there are green/ yellow trails behind the white bars, and – to a lesser extent – blue/ purple fringing at the front. These are phosphor trails, also known as “phosphor lag“, “comet trails“, “green tinge“, “yellow smear” or “plainbow” on the forums.
Why Does This Happen?
Different chemical elements are used in the production of individual red, green and blue phosphor coating in plasma cells. The difference in chemical properties results in a variation in the excitation and decay time: blue is the fastest; green, the slowest; and red in between. Consider the following illustration of a moving white bar which requires equal mixing of red, green, blue (RGB):
Which explains the blue and magenta fringing at the front of the moving bar, and the yellowish green trail. Because the human eye is least sensitive to blue intensity, people usually only notice the green/ yellow trails when a bright image moves quickly across a dark background. The faster the movement, or the higher the contrast is, the more apparent the phosphor trails become.
[ 本帖最后由 雨轩 于 2010-3-6 16:43 编辑 ] |
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