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brightness


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Showing 1-8 of 8 posts in this discussion
Initial post: May 6, 2012 3:27:17 PM PDT
Can I change the brightness to my Kindle?

Posted on May 6, 2012 3:28:49 PM PDT
Only on the Fire. E-ink kindles aren't lit.

In reply to an earlier post on May 6, 2012 3:30:56 PM PDT
Its the Kindle touch screen..any difference?

In reply to an earlier post on May 6, 2012 3:32:11 PM PDT
Just Peachy says:
Is it a Touch? Is it in black and white only? The Fire has a touch screen but is backlit and in color. The Touch is eInk and you cannot change the brightness.

Posted on May 6, 2012 3:32:42 PM PDT
Arual says:
Beverly,

If you DO mean the Fire, tap the gear icon on the top right of your screen. You'll see the word "Brightness." Tap that and you can change it to what is comfortable for you.

In reply to an earlier post on May 6, 2012 3:33:45 PM PDT
Ok, thank you...

Posted on May 6, 2012 3:34:22 PM PDT
Arual says:
Woops, I was too slow.

No, Beverly. As Erich said, the screen brightness on e-ink Kindles cannot be changed. A Touch is an e-ink model.

In reply to an earlier post on May 6, 2012 3:41:31 PM PDT
Last edited by the author on May 6, 2012 3:43:43 PM PDT
Dragi Raos says:
Huge difference, like between TV screen and a page from newspapers.

All Kindles except Fire use something called e-ink screens. They consist, to simplify a bit, of tiny capsules of opaque (or strongly opalescent) white viscous fluid with even tinier black particles suspended in it. Electric field pushes those particles into the fluid, or brings them near the surface. But even when immersed, black particles show a bit (because capsules are very small, much smaller than individual pixels making up the page image) - hence overall "grayness" of the page. The important point is that the screen is opaque, and therefore can only be lit from front, just like paper.

Fire, OTOH, has LCD screen, with array of tiny transparent filters in three primary (additive) colors, lit from behind (by LEDs, I think; fluorescent lamps are also used on some screens). Above (or below) filters are two polarizers with perpendicular planes of polarization, sandwiching a layer of liquid crystals (a peculiar kind of liquid with large, semi-organized molecules), which can be induced by electric field to rotate the plane of polarization of light passing through it. This sandwich acts as "valve" or shutter for light.

See
http://en.wikipedia.org/wiki/Electronic_paper#Electrophoretic
vs.
http://en.wikipedia.org/wiki/Liquid_crystal_display
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Discussion in:  Kindle forum
Participants:  5
Total posts:  8
Initial post:  May 6, 2012
Latest post:  May 6, 2012

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