Quote:
Originally Posted by murraypaul
There is X% chance of a single point failure in a given size of screen.
If you are making 4 small screens, and a failure occurs, it will only occur in one of them, so you lose one screen, and keep three.
If you are making one large screen, and a failure occurs, you lose that screen.
Very simplistically, four times the screen area means four times more likely for a defect to occur on that screen.
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What kind of failure are you talking about? My devices have some capsules that remain permanently gray. Since a pixel is composed of hundreds of capsules it is not a problem.
Quote:
Originally Posted by HarryT
Exactly. If you have a 10% production defect rate in a screen of a certain size, doubling the linear size of the screen makes it into a 34% defect rate. (The original screen has a 0.9 probability of being defect-free, the larger screen only has a 0.9^4 = 0.66 probability of being defect-free.) So if you charge $20 for the smaller screen, you need to charge $272 (20 x 4 x 3.4) for the larger screen to make the same amount of money from your production run.
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Where do you get the 3.4 from? 34% is 0.34 if that is what you were going for, but you wouldn't multiply it like that.
The 2nd grade math goes like this:
$20x4x(0.9/0.66)=$109.09
And I still don't see what size dependent failure you are talking about.