I think it's the fact that he wants to use it as a clock, and not just to check for messages. Thanks DroidXcon for the info. I too like to use my Fascinate as a clock at night. I figured since Samsung designed the clock to come on when docked, and they give no warning about screen burn-in, that it would be covered under their warranty. So I don't worry about it too much.
yeah best thing to do would be to drop the brightness to low but that doesnt guarentee that it wont burn in. Unlike LCD which burn in happens do to crystal alignment OLED is a completely differnt type of screen, burn in occurs when the emitter material ages. if the screen ages all at the same time you wouldnt notice this occurence at most you would notice a slight color shift. but since certain colors require more power than others they will age more quickly leaving burn in.
longest to shortest living colors are as follows in this order.
1. Red
2. Green
3. Blue
Blue is the most difficult color to work with always.
as the technology matures you will see increase in life and less burn in will occur.
Also you will see longer life times.
there are 2 main types of OLEDs that are used.
Fluorescent and phosphorescent
At the moment Samsung uses 2 colors that are fluorescent and 1 that is phosphorescent.
Phospheorescent is more efficient and uses less power; but at the moment 2 of the colors although more efficient, do not live as long. We are working on making phospheorescent live longer and as time goes on you will see screens start to use all 3 colors with phospheorescent materials and battery life will be alot less.
Many people try to compare LCD screens vs OLED screens but you cant really do that with phones because they are built completely different so raising the brightness on both is a useless test.
comparing LCD and OLED is completely apples and oranges.