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 argument over LCD TV quality:here's a buying guide |
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作者：Anonymous 在 罕见奇谈 发贴, 来自 http://www.hjclub.org
Category 5: Viewing Angle
Plasma TV have typically a 160 degree viewing angle. This is primarily because light is emanated directly from the sub pixels whereby in an LCD TV light is eminated from the backlight. The backlight is then polarized by the sub pixels to produce colour, in effect causing degradation at angles more than 25 degrees off axis. However with new substrate materials and improving technology LCD TVs can only get better.
Conclusion: Plasma
Category 6: Animation Quality
Its very important for TVs to be able to display fast paced action movie scenes with no blury, smearing afterimages. For LCD TVs the switching speed within subpixels for for display content is quite slow, making blurring a common problem. The switches need time to cycle through the on-off sequence, typically 1/30th second. This is more time than it takes to display two video fields - so rapidly moving LCD images leave trails behind them, or the images seems like its blurred.
While LCD technology has come a long way, there is still room to improve in this department. Hitachi attempts to remove blurring by adoption of the super impulse method. This method inserts black colouring based on internal processing each time the display content changes. This increases the speed of response to gray levels.
Ther are new LCD TV s to be released in late 2004 which have a grey to grey response rate of 8ms. This means LCD TVs will improve, removing any of the smearing afterimage that is seen in todays LCD TVs. Todays LCDs typically have a response time of 16ms.
作者：Anonymous 在 罕见奇谈 发贴, 来自 http://www.hjclub.org |
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