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The Display: Lower Price, Lower Quality

Hands-On: Amazon's Fourth-Gen Kindle Refresh
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There's no question that electronic ink technology is completely different from what you seen from an LCD monitor. However, the first stage of E Ink's electronic paper screen production is essentially the same. There's a matrix similar to what you'd find in a computer display, except that E Ink covers that with a layer of transparent microscopic capsules that contain viscous fluid, along with positively-charged white pigments and negatively-charged black pigments.

IPS Panel Under The MicroscopeIPS Panel Under The MicroscopeE-Ink Panel Under The MicroscopeE-Ink Panel Under The Microscope

For an e-book reader, the benefits of E Ink technology are obvious because image quality is independent of viewing angles and lighting conditions. It's truly like reading a pad of paper. Better yet, power is only consumed when the screen changes, like when you turn a page. That makes the battery life of an e-book reader nearly 100 times greater than that of an LCD-based tablet or mobile phone.

E-Ink Display - Turning A Page (Amazon Kindle)

Kindle Keyboard: TextKindle Keyboard: Text

Kindle (4th-gen) TextKindle (4th-gen) Text

According to its spec sheet, Amazon is using the same 6" E Ink 16-level gray scale display (600 x 800 pixel resolution at 167 PPI) on the third- and fourth-gen Kindles. After using the new silver Kindle for a few hours, though, it felt like I was reading text on an inferior screen.

Turning on our microscope, text on the fourth-generation Kindle appears more dithered around the borders. Meanwhile, text on the Kindle Keyboard is slightly sharper, and the black is a little darker (focus on the "y" and "o" in the pictures).

Deeper Black on Kindle KeyboardDeeper Black on Kindle Keyboard

We called up E Ink Corporation to ask if this was a batch-related issue, and was told that this is most likely due to Amazon choosing a particular grade of display panels. So, while the new Kindle comes at a lower price, the company is probably cutting its costs as well by using a slightly cheaper display.

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