MobileRead Forums - View Single Post - Why i think the Illiad will fail (or has already).

mike b · 01-11-2007, 09:58 AM

[QUOTE=jæd]And how readable is the [OLPC] display in bright sunshine...?

From the article:

Keeping the 377-Mhz AMD processor processor from having to sip from the battery was a key concern. When used as an eReader, a separate frame buffer keeps the LCD updated, rather than having the processor do the job. This drastically reduced the power needed to keep a page displayed while a child reads. In general, the XO uses what Bletsas calls "Extreme Suspend," going to sleep after two seconds of inactivity, but waking up within 300 milliseconds of an action.

The innovative display design serves two purposes. By overlaying a lower resolution (1024x768) color screen over a very high resolution (200 DPI, 1200x900) black and white one, then can get what to the eye appears to be a much higher color resolution. The color display is transmissive and requires a 1-watt backlight, which is provided by power-efficient LEDs. The black and white display is reflective, and actually performs better the brighter the ambient light is. This makes it ideal for rural teaching settings, where classes may be held outdoors. Switching from color to black and white is simply a matter of turning off the backlight. The ultra-high resolution black and white display is meant to make the eReader highly useable for textbooks. Bletsas notes that although the display cost only about one-third what a typical laptop LCD costs, it will have a higher resolution that 95% of the laptops on the market.

Elegant.

01-11-2007, 09:58 AM	#103
mike b Member Posts: 16 Karma: 10 Join Date: Jan 2007	[QUOTE=jæd]And how readable is the [OLPC] display in bright sunshine...? From the article: Keeping the 377-Mhz AMD processor processor from having to sip from the battery was a key concern. When used as an eReader, a separate frame buffer keeps the LCD updated, rather than having the processor do the job. This drastically reduced the power needed to keep a page displayed while a child reads. In general, the XO uses what Bletsas calls "Extreme Suspend," going to sleep after two seconds of inactivity, but waking up within 300 milliseconds of an action. The innovative display design serves two purposes. By overlaying a lower resolution (1024x768) color screen over a very high resolution (200 DPI, 1200x900) black and white one, then can get what to the eye appears to be a much higher color resolution. The color display is transmissive and requires a 1-watt backlight, which is provided by power-efficient LEDs. The black and white display is reflective, and actually performs better the brighter the ambient light is. This makes it ideal for rural teaching settings, where classes may be held outdoors. Switching from color to black and white is simply a matter of turning off the backlight. The ultra-high resolution black and white display is meant to make the eReader highly useable for textbooks. Bletsas notes that although the display cost only about one-third what a typical laptop LCD costs, it will have a higher resolution that 95% of the laptops on the market. Elegant.