Toshiba offers an interesting screen: it is USB powered. The slab has a diagonal of 14 inches and incorporates a graphics card, USB DisplayLink technology. Toshiba announced that it can operate without being connected to an outlet, even if it is obviously possible to go through a conventional transformer.
To get to run a screen with 2.5 W, Toshiba has made concessions: the panel has a response time of 16 ms only, it only displays 256,000 colors and contrast is very low advertised: 400:1 . The definition is correct: 1366 x 768. For brightness, Toshiba announces 220 cd / m² with the AC adapter and does not specify brightness can be achieved with USB.
Please note that the proposed entrance is only USB: No way to connect the screen to VGA, DVI or HDMI. The camera is fairly compact 1.5 x 23.9 x 34 cm to 1.2 kg. Even if the characteristics somewhat dated, it is an achievement to reach this power a screen diagonal of 2.5 W with a standard USB port can provide.
Everything is sold for $ 200, which is OK, nothing more. 
To get to run a screen with 2.5 W, Toshiba has made concessions: the panel has a response time of 16 ms only, it only displays 256,000 colors and contrast is very low advertised: 400:1 . The definition is correct: 1366 x 768. For brightness, Toshiba announces 220 cd / m² with the AC adapter and does not specify brightness can be achieved with USB.
Please note that the proposed entrance is only USB: No way to connect the screen to VGA, DVI or HDMI. The camera is fairly compact 1.5 x 23.9 x 34 cm to 1.2 kg. Even if the characteristics somewhat dated, it is an achievement to reach this power a screen diagonal of 2.5 W with a standard USB port can provide.
Everything is sold for $ 200, which is OK, nothing more.
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