目前的高清电视的图像是由200余万个像素点构成的。新的4K电视将像素数大大提升至800万以上。4K意味着电视屏幕的水平像素数为4,000个。相比传统高清电视只能清晰地显示演员的面容,4K电视能纤毫毕现地展示人物周围的一草一木。换句话说,图像不但更清晰,而且层次也更丰富。
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Several 4K models employ organic light-emitting diodes, or OLEDs, to produce brighter images. Blacks are blacker, and colors bolder -- the holy grail of television imaging. And because such sets don't require a separate built-in light source to illuminate the picture, as many of today's flat panels do, OLED displays are much thinner and more flexible. One Samsung model is actually slightly curved.
不少4K电视都使用了有机发光二极管屏幕(即OLED)以显示更加明亮的图像。黑色更黑、而彩色更艳——这是评判电视图像的最重要标准。目前的液晶电视都需要内置额外的背光源,而4K电视可以借助OLED直接显示,所以它能更纤薄,更柔韧。三星(Samsung)有一款电视甚至是微微弯曲的。
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There are few sources of 4K video. The content that does exist takes up huge amounts of space. For instance, the 4K documentary TimeScapes -- a 48-minute ode to the people and scenery of the American Southwest -- consumes a whopping 330 gigabytes. (A typical Blu-ray film is more than 10 times smaller.) Netflix (NFLX) and Samsung are currently working to trim gargantuan files.
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