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View Full Version : Weird Idea - Need Pixel Info


Computer_Phreak
Jun 3, 2003, 07:01 PM
Ok...

I have an unusual idea, but i need some background info first. Black pixels, specifically on the ipod, is the topic.

1. What is the response time in ms (balllpark)?

2. From the time of the request till the time the pixel turns completely black, are there any shades of grey in between? Or does the pixel turn from off to on at the last ms of the response time?

shadowfax
Jun 3, 2003, 07:08 PM
you really should ask apple technical service about this in an email or something. i am sure they have this data, but i am reasonably certain they don't bother to publish it in even the most detailed data sheets.

scem0
Jun 3, 2003, 07:10 PM
Do you care to explain what this idea is?

I'm sure I'm not the only one very interested.

http://www.blizzforums.com/images/smilies/uhh.gif Not that I want to steal the idea or anything.... http://www.blizzforums.com/images/smilies/devil.gif
;)

- scem0 http://www.blizzforums.com/images/smilies/twitch.gif

Computer_Phreak
Jun 3, 2003, 07:17 PM
ok... well lets assume that a pixel actually DID go from white to black in a linear manner (which im sure it doesn't). The pixel could be rapidly turned on and off in certain patterns to produce artificial colors of grey...

does anyone else think they understand my blabbering? :D

Mr. Anderson
Jun 3, 2003, 07:22 PM
Ah, but there might not be anyway to differentiate levels of gray. You'd also have to deal with the persistance of the LED and of human eyes.

I'm thinking its not possible, that or the results won't really be worth it. A fast on off might get you the semblance of gray (1 extra color only).

D

Computer_Phreak
Jun 3, 2003, 07:25 PM
Originally posted by Mr. Anderson
Ah, but there might not be anyway to differentiate levels of gray. You'd also have to deal with the persistance of the LED and of human eyes.

I'm thinking its not possible, that or the results won't really be worth it. A fast on off might get you the semblance of gray (1 extra color only).

D

ya i figured it probably wouldn't be possible... ill try to whip up a graph if there seems to be any possibility in it.

King Cobra
Jun 3, 2003, 07:26 PM
Well the sequence of the two frames, one black and one white, would have to be very fast. Experiment with it for a while to see what works best.

I'm thinking you'll need to go at least 50 frames per second. But then again, you may just get an invisible line or a very faint gray.

But I don't think Apple does this now. Apple did this with some monitors on the boot screen for OS 9. The boot screen was off-center for one frame, and it was noticible. The flash for that one frame was very short-lived, somewhere around 0.01 seconds.

Computer_Phreak
Jun 3, 2003, 07:33 PM
here is a quick drawing i did in paint...

it assumes that the progression of white to black in the pixels is linear, and that the ipod would be able to switch the pixel on and off every milisecond.

http://home.sc.rr.com/pchris/idea.JPG

That would theoretically keep the level of grey quite static at a mid-tone.

cb911
Jun 3, 2003, 09:59 PM
hhmmm... that's an interesting idea. perhaps you would have better luck trying at an iPod only site, i know there's a few out there. you could ask in the forums there, i'm sure you'd get some good answers.

shadowfax
Jun 3, 2003, 10:23 PM
yeah.

try this one:
http://www.ipodlounge.com/forums/

the place seems pretty active. but i don't think you've found a very efficient way of making a grayscale rather than monochrome screen. it seems like there is a contrast adjustment on there. if you could just adlust that on a per pixel basis, you would be set.