Opening a can of Pixels- Dead Pixels
I have bounced around the boards for at least half a decade. Every time Apple releases a new flat panel model (desktop or portable) there are questions about pixels, screen clarity, intrinsic faults, etc. The people that have problems are vocal and those that are happy rarely chime in. I haven't seen any new Macs with dead pixels yet, but I am sure that it does happen. When I got my revB iTang, there were three partially dead pixels. Strangely, I grew used to them. When I sent my iBook in for repair (bad handle), Apple fixed it for free; I didn't even ask. Their stance is strong. A threshold of dead pixels has to be met. I think it somewhere in the order of 27 single instance failures, or 5 completely dead pixels in a row. (This coming from a friend that once worked at Apple.) I was told that a lot of companies have similar rules. Check out Apple's technical notes for the older PBs. There, they state that to keep the computers affordable, that they allow for a certain # of failed transistors. (I am looking for a link.)
A lot of people are fear dead pixels on the 17'' iMac, most before they buy or receive one.
Lets crunch the numbers.
Given:
17 iMac 1440*900 resolution = 1,296,000 pixels.
and an arbitrary 5 dead pixels
and 'dead' = all transistors for a single pixel are not working
and that I don't care about sig. figs. or showing the work
case 1, simple RGB, 3 transistors (1 for each color)
# transistors Pixels *3 = 3,888,000 transistors
5 dead pixels * 3 transistors/ # transistors * 100 ≈ 0.0003858%
case 2, simple 3 transistor model (see above)
25 single or stacked transistors failed
25 bad transistors/ total # of transistors *100 ≈ 0.000643 %
Somebody told me that there were between 5 to 7 transistors per pixel. Given the former, that's 6,480,000 transistors per point. This isn't including all of the processing for the images. WOW!, those are some big numbers.
I am not belittling the fact that a single pixel out or that is improperly colored is distracting- it's down right annoying. Nobody wants something that is defective from the start, but how often does it really happen.
Chime in as you wish, about numbers or what ever is related to this thread.
How many dead pixels have you experienced on your new Macs?
Which models do you own iMac, PB, iBook, etc..?
Is there a lot of this fear board/rumor generated, or is it a common occurrence?
I have bounced around the boards for at least half a decade. Every time Apple releases a new flat panel model (desktop or portable) there are questions about pixels, screen clarity, intrinsic faults, etc. The people that have problems are vocal and those that are happy rarely chime in. I haven't seen any new Macs with dead pixels yet, but I am sure that it does happen. When I got my revB iTang, there were three partially dead pixels. Strangely, I grew used to them. When I sent my iBook in for repair (bad handle), Apple fixed it for free; I didn't even ask. Their stance is strong. A threshold of dead pixels has to be met. I think it somewhere in the order of 27 single instance failures, or 5 completely dead pixels in a row. (This coming from a friend that once worked at Apple.) I was told that a lot of companies have similar rules. Check out Apple's technical notes for the older PBs. There, they state that to keep the computers affordable, that they allow for a certain # of failed transistors. (I am looking for a link.)
A lot of people are fear dead pixels on the 17'' iMac, most before they buy or receive one.
Lets crunch the numbers.
Given:
17 iMac 1440*900 resolution = 1,296,000 pixels.
and an arbitrary 5 dead pixels
and 'dead' = all transistors for a single pixel are not working
and that I don't care about sig. figs. or showing the work
case 1, simple RGB, 3 transistors (1 for each color)
# transistors Pixels *3 = 3,888,000 transistors
5 dead pixels * 3 transistors/ # transistors * 100 ≈ 0.0003858%
case 2, simple 3 transistor model (see above)
25 single or stacked transistors failed
25 bad transistors/ total # of transistors *100 ≈ 0.000643 %
Somebody told me that there were between 5 to 7 transistors per pixel. Given the former, that's 6,480,000 transistors per point. This isn't including all of the processing for the images. WOW!, those are some big numbers.
I am not belittling the fact that a single pixel out or that is improperly colored is distracting- it's down right annoying. Nobody wants something that is defective from the start, but how often does it really happen.
Chime in as you wish, about numbers or what ever is related to this thread.
How many dead pixels have you experienced on your new Macs?
Which models do you own iMac, PB, iBook, etc..?
Is there a lot of this fear board/rumor generated, or is it a common occurrence?