Conventional wisdom is that the original EInk readers did not come with touch screens because they would dim the screen. Wacom (used by iRex) does not do this, but is expensive. I originally assumed that the PRS-700 used PVI's Touch EPD (
PVI adding "touch" to eink), but this is entirely behind the screen. From the
press release:
Quote:
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PVI’s new Touch EPD uses the innovative “force sensing” touch technology. In this technology, several force sensors are placed under the e-paper display. When a user touches the display, proprietary software calculates the location and intensity of the touch with input from the sensors. There is no additional layer of materials on top of he display as there is in traditional touch technologies; as such, there is no impact to the reflective qualities of the display.
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This does not sound like the PRS-700 at all. It seems that Sony may be using touch layers above the EInk film, and tried to turn a problem into a feature by adding side lighting between the layers.