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Panasonic Viera plasma HDTVs deliver exceptional picture performance throughout the lifetime of these products. Various elements and material characteristics of all electronic displays change with use over time. In order to achieve the optimal picture performance throughout the life of the set, Panasonic Viera plasma HDTVs incorporate an automatic control which adjusts an internal driving voltage at predetermined intervals of operational hours.
As a result of this automatic voltage adjustment, background brightness will increase from its initial value. After several years of typical use, the internal material characteristics will stabilize and no additional automatic voltage adjustments are required. The Black Level at this stabilized point will yield excellent picture performance.
The newest Viera plasma HDTVs incorporate an improved automatic control which applies the voltage adjustments in smaller increments. This results in a more gradual change in the Black Level over time.
上面的引用是松下官方说的,懂英文的朋友应该能看懂上面的话,“内部驱动电压会按照预先设定的程序,随机器使用时间自动调整。调整的结果是黑位逐渐提升,以至于黑位越来越差。电压提升几年后在内部材料稳定之后无需调整。
最新的PDP自动电压调整的幅度更小,由于电压调整导致的黑位变化也更小。”
松下的说辞里,把电压逐年“提升”说为“调整”,不管怎么说,结果就是黑位越来越差,也就是画质越来越差,等离子随着使用年限的增加,画质会劣化,特别是2009年之前的产品,之后松下做了改进。
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