Ultra-high-definition televisions, also called "4K" sets, have been on the market less than two years but already make up at least 10 percent of revenue at Sony's TV business, its chief executive said Tuesday.
The TV sets have a screen resolution four times that of today's best high-definition televisions and can display very sharp images when fed with 4K content, but first- and second-generation models are much more expensive than conventional TVs.
Sony's current cheapest 4K television, a 55-inch model, costs $3,000, and its most expensive set, an 84-inch model, costs $25,000.
Related: Sony shines a spotlight on 4K at CES
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