Thank you... I'm going to look to see if our new iPads have them
It's likely if you can't see nothing wrong.. you don't have any... ;-)
The iPads screen is made up of over 3 million tiny pixels (2080x1536 of them) if it's a solitary dead pixel it will appear on a white screen as a tiny black dot, and would just about be visible, (may need a magnifying glass..lol) but in any case you would really have to look closely. Pixels that get stuck 'on' can be more troublesome depending on the level they are stuck on at..ie. if they happen to be stuck at maximum brightness and are a light colour they can show up quite easily, and are more annoying of the 2 types. For example it it was stuck on a blue colour then the only time you may not notice it is on a blue screen.
However with the resolution of the iPad being so high they will be really tiny, though sometimes you can get a cluster of them together having the effect of making the dot you see appear slightly larger and more clearly visible, and as stated they are always in the same place of course.
Bad pixels have been the subject of some controversey since they first started manufacturing LCD panels, indeed at one time you would be very fortunate to buy a lcd monitor or TV without it having one or more bad pixels, so to prevent lots of returned products, manufacturers stated in the specifications that their monitors were in specification if it had say less than 5 or 10 bad pixels, and dealers would not change them unless that number was exceeded, the tolerance number varied between the brands, and prices paid.
Their argument was.. that to manufacture and guarantee every panel to be 100% perfect would not be financially viable, as it would result in too many panels being scrapped making the price of the panels too expensive, so that the public wouldn't be able to afford the higher prices they would need to charge... in effect killing the whole of the industry.
These days things have improved a lot, we still get bad pixels on monitors and TV's or any item that uses LCD panels, but they certainly don't occur so frequently. I bought my current Dell 27" monitor because Dell have a policy on their topend monitors of having zero bad pixels, IOW if your new monitor has even 1 bad pixel they will replace it without any hassle.
Some other companies are less obliging... thankfully IME Apple is not one of them... not when the Apple item is brand new anyway.
TBH if one gets a bad pixel appear after a few weeks or months of use then it's a case of living with it.. it's not a disaster, and after a time you learn to ignore it, assuming you can see it in the first place..lol but I won't tolerate bad pixels when a item is brand new, especially if it's expensive, thankfully most retailers are a little more inclined to replace when new than they used to do.
There's nothing worse that seeing a bright pink or blue dot smack in the centre of your screen, but there were some that would'nt change it for you, without a lot of grief.
I bought a Canon 60D DSLR last year which had a stuck pixel just off centre on its 3inch lcd, and ended up sending it back to
Amazon, imagine how that looked on my new toy which had just cost me almost £1000, but some dealers may have said that it was acceptable... well sorry..but not for me it isn't.. Which is why I bought it from
Amazon just to get their easy no quible return option.
Slowly however, manufacturing processes have improved so much that bad pixels are rare, they still occur, but far less frequently.
The OP should take it back and get it replaced while he can.
This book by Lunar is available at all good book stores priced 99p...lol