I have to apologize. I missed some of your message. You're right. I'm
wrong. I am really sorry. Technically, I may be violating my pledge not
to go OT but I think this message does not violate the spirit of the pledge.
On 11/17/2016 07:44 AM, Scott Granados wrote:
My explanation is exactly what you said, you use matrixes of transistors to
move the liquid crystals in to different charged states that filter white light.
I’m not going to argue with you because you’re to dense to listen and it’s a
waste of my time but you literally confirmed everything I said in your response.
On Nov 17, 2016, at 8:06 AM, Todor Fassl <fassl....@gmail.com> wrote:
You don't actually understand how a screen works, right?
Actually, I googled it and it does make sense. So a touch screen works by
filtering phosphorescent light. It's likechristmas lights. They are just white
lights with a colored transparent plastic bulb. The screen aligns crystals to
filter the light depending on what color each pixel is to display. If you align
the crystals so they filter all of the light, that's black. So actually, the
device probably is absorbing that energy and radiating it as heat when you turn
the screen curtain on.
Your explanation is nonsense but the screen curtain may not save energy. You
happen to be right but for the wrong reason.
On 11/16/2016 09:52 PM, Scott Granados wrote:
Of course black requires power, any light omitted regardless of color requires
the same amount of power. The color of the pixels doesn’t matter they all
generate the same amount regardless of whether it’s white, black or something
in-between. Hell, pixels technically don’t even have to omit visible light to
draw power if they generated something in the infrared or ultraviolet spectrum.
It’s not like CRT displays where black is generated by pulsing off the
electron gun.;)
A good understanding of how displays work would be a good start. In the case
of these screens, basically each pixel or color element consists of a
transistor array and elements that are combined to generate a particular set of
colors. Some use red, green and blue in combination, others use C Y M and K
and all designs use a backlight. You also have designs where the transistor
array enables a set of chemicals which can become opaque to certain colors or
all colors based on the light filtered so it’s a subtractive system. You start
with a white light in the back and you filter out all the color combinations
you want to block to leave yourself with the color you wish to display that
remains. In this case, you’d activate all the transistors in the array to
filter out all colors and be left with the absence of color for that particular
element. If the screen curtain is enabled the back light is still generating
the same white and the pixel elements are filtering out that white light on all
elements being left with the absence of color yet the net energy drain is the
same. Whether an additive or subtractive system you will draw power per
element to generate a color or in the case of black the absence of color. You
also still have the multiplexer / demultiplexer electronics that are carrying
the black signal that draw power regardless of the color being generated, the
graphics processor is generating a signal with all black elements and so on and
so forth. All displays work a little differently whether it’s LCD which tends
to be subtractive or LED where you use light emitting components or OLED that
uses organic chemistry under electrical stimulus to generate light the concepts
are the same.
On Nov 16, 2016, at 10:11 PM, Todor Fassl <fassl....@gmail.com> wrote:
No, black does not requirejuice. I have been thinking about this and this
thing about the screen curtain not saving power defies the laws of physics.
When the screen curtain is off, light is emitted from the screen. Energy is
escaping through the screen. If the screen curtain is off, where does that
energy go? Does turning on the screen curtain make the device disipate more
energy as heat or something? I doubt it.
On 11/16/2016 11:31 AM, Scott Granados wrote:
David this sounds correct to me as well, black requires juice just like all the
other colors. Turning down the brightness is the only way to save power with
the screen. Frankly, I don’t bother, just put the brightness in auto mode and
let her rip.
On Nov 15, 2016, at 1:00 PM, David Chittenden <dchitten...@gmail.com> wrote:
According to Apple, screen curtain has no effect on battery life. Screen
curtain sets all the pixels to black. It does not turn the backlight off.
Kind regards,
David Chittenden, MSc, MRCAA
Email: dchitten...@gmail.com
Mobile: +64 21 2288 288
Sent from my iPhone
On 16/11/2016, at 06:42, Anders Holmberg <and...@pipkrokodil.se> wrote:
Hi!
Screen curtain does not help saving battery from what i have heard.
But i am not sure.
/A
13 nov. 2016 kl. 19:17 skrev Anne Robertson <a...@anarchie.org.uk>:
Hello,
The battery drain problem is a known issue and would appear to be fixed by the
second release of iOS 10.1.1. It has nothing to do with using VoiceOver as
non-voiceOver users have the same problem.
Cheers,
Anne
On 13 Nov 2016, at 17:50, Todor Fassl <fassl....@gmail.com> wrote:
Have you fiddled with the screen brightness? I have the screen bightness on my
itouch set to zero and the screen curtain on as well. But some of my friends
who are visually impaired turned the brightness up and it drained their battery
a lot.
On 11/12/2016 01:27 PM, Andrew Lamanche wrote:
Hi Listers,
I have a new ipod touch - the latest one - but I'm somewhat puzzled if not disappointed, that the
battery doesn't last on it as long as it is promised in the advert on Apple's website. I haven't
been using it very much and yet the battery drains quite quickly. In the last 24 hours i would
have used it for about 3 hours and it's already down to 20% only. Is this normal? Just wanted to
know what your experiences with batter life are, any tips and tricks? I've switched off
"background app refresh", and enabled "reduced motion" both of which are
supposed to improve battery life. I've also switched of mail fetching so that I do it only
manually.
Andrew
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