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0 pointsbravo2211y ago0 comments

You have a segmented e-ink display in there.

They have a full pixel display. They are different. E-Ink displays are 1.18mm thick per their spec sheet and you have to add some mechanically stiff backing to that.

Looking at a detailed photo [1] it looks like a STN segmented LCD but I could be wrong.

Incidentally, do you have a pair of callipers handy? Could you measure the PayPal Security Key?

I don't think it is the same thickness as a credit card.

[1] http://www.stahlke.org/dan/displaycard/front.jpg

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cgjaro11y ago

I do have a PayPal Security Key. My calliper measures 0.81mm, compared to 0.78mm for credit cards. So it is indeed pretty much the same thickness.

bravo22OP11y ago

Thanks.

I looked at more teardown pics. It is definitely a segmented display which is far easier to drive than an active matrix (i.e. "pixels"). They also don't have wireless and a host of other things that this device proclaims to have.