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general question on pixels

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Last response: in Graphics & Displays
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August 11, 2013 9:48:08 AM

how to detect dead pixels?? what will be there color on different color backgrounds lyk white,blue etc etc...can anybody brief me??
August 11, 2013 9:53:57 AM

nag shankar said:
how to detect dead pixels?? what will be there color on different color backgrounds lyk white,blue etc etc...can anybody brief me??


For me, dead pixels mostly appeared as darkish/greenish spots on a white background. If a pixel can not display the color it is supposed to display, it's pretty safe to say it's dead.

What kind of display are you asking about though? LCD?
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August 11, 2013 9:57:31 AM

You can pick a dead pixel out of a solid color background.
Here is one such tester:
http://jasonfarrell.com/misc/deadpixeltest.php
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August 11, 2013 9:59:28 AM

How to detect them is simply to look at the screen! :p 

There are technically two different things here: a "dead" pixel is always black; a "stuck" pixel is always lit up the same color. Mostly I see the latter as opposed to the former. Good pixels change color and brightness in response to commands from the GPU. A stuck pixel can in principle be stuck on any particular color.
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August 11, 2013 10:17:18 AM

LED is just an LCD with a different kind of backlight (LED instead of thin fluorescent tubes). The actual LCD panel works the same basic way for an "LCD" or "LED"
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August 11, 2013 10:17:20 AM

that dot semms to be black in color on all backgruond!!!! even on black background!! it shud be white dot on black background if it is a dead pixel rite??

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August 11, 2013 10:17:29 AM

that dot seems to be black in color on all backgruond!!!! even on black background!! it shud be white dot on black background if it is a dead pixel rite??

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August 11, 2013 10:19:09 AM

As I indicated, a pixel can be stuck either "on" (a bright color) or "off" (black). What makes it dead is that it never changes color or brightness.
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August 11, 2013 11:43:27 AM

nag shankar said:
that dot semms to be black in color on all backgruond!!!! even on black background!!


I laughed at this

Realistically a dead pixel will generally be stuck at a certain color.
It will not show up on some backgrounds if its RGB value matches the surrounding.

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August 11, 2013 12:38:26 PM

anyways...wil it spread around??
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August 11, 2013 12:40:08 PM

I am not sure what you mean by "spread around"
If you mean get worse, then usually not but it can happen.
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August 12, 2013 9:47:58 AM

i mean..wil it increase in future,now i'm havin only small 1's,wil it become bigger nd wil ther be stil more dots in future?

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