Did anybody got a idea to switch the Keyboard illumination separately off.
During specially ambient light conditions the keyboard layout comes unreadable.
Thanks Ingo
on my device, the KB lights are automatically turned on if the light is not enough, it's using the light sensor (same for LCD brightness).
Same, when the light is very poor the light sensor triggers the keyboard lights to turn on
Yeh
One thing I have been very pleased with on my Xperia is the sensitivity and success rate of the automatic light sensing.
Every phone I have had in the past 5 or so years has had this sort of thing (incuding almost every N series device from Nokia and an iPhone and non even came close to switching as correctly (at the right time) and as quickly as this does.
I have not once yet found myself having a problem with seeing the screen or Keyboard.
Hi
Just wondered if the Screen Adjuster app poses any risk of damaging the S4 screen after a while? My phone has a noticeable yellowy green tint which makes photos and videos appear slightly green. I downloaded the Screen Adjuster app which lets you adjust the red green and blue sliders and it reduces the yellow tint (although it doesn't work when playing videos annoyingly).
I have seen on other similar apps the developer putting a warning not to use the colour slider tints on OLED screens as it damages them, so I just wondered if I always have the Screen Adjuster switched on whether I am damaging my screen in the long run?
Hello guys,
To save battery thru screen use as much white background as possible cuz LCD Screen uses White pixel backlight and white will use less battery,, it's the complete opposite of amoled screen while they use black pixel.
To save battery more turn on gps but device only, cuz the Google play services (locations)
Use the wifi and network to share the location, so leave it at device only and the GPS will be offline until you use an app needs GPS
More tips I will share,
Thanks
this with lcd screen is bull****. only way to save battery on display is to set brightness down.
backlight for the whole screen makes the light, not the pixels itself like on amoled.
He actually is true but the effect is so low it doesn't matter.
To Display a black (or dark) image the LCD needs to block the backlight (which is always on) and this in fact requires more energy than letting the light pass and displaying a white screen.
Hi there !
Just call me a noob - but I don't understand a feature of that "Ultra power saving mode". It's the black and white display.
If we dare to ignore the special features of a pentile matrix, it comes down to a pixel consisting of three subpixels: Red, Green, Blue (RGB).
To display greyscales of the color "white" , we need ALL THREE subpixels illuminated: [•••]
For displaying the colors "red", "green" or "blue" we'd need just ONE subpixel illuminated: [•] or [•] or [•]
Clear so far ? - Well.
AMOLED displays control each subpixel directly - many subpixels illuminated = high energy drain, few subpixels illuminated = low energy drain.
So is there any sound reason for choosing a display color (grey) which always needs ALL subpixels illuminated, thus causing three times the battery drain a red, green or blue display would cause ?
Do I overlook something ?
AMOLED display is just multiple lights producing images. The reason the ultra power saving mode is black and white is because AMOLED display will turn off the light in the subpixels to produce the black color.
Chefproll said:
Hi there !
Just call me a noob - but I don't understand a feature of that "Ultra power saving mode". It's the black and white display.
If we dare to ignore the special features of a pentile matrix, it comes down to a pixel consisting of three subpixels: Red, Green, Blue (RGB).
To display greyscales of the color "white" , we need ALL THREE subpixels illuminated: [•••]
For displaying the colors "red", "green" or "blue" we'd need just ONE subpixel illuminated: [•] or [•] or [•]
Clear so far ? - Well.
AMOLED displays control each subpixel directly - many subpixels illuminated = high energy drain, few subpixels illuminated = low energy drain.
So is there any sound reason for choosing a display color (grey) which always needs ALL subpixels illuminated, thus causing three times the battery drain a red, green or blue display would cause ?
Do I overlook something ?
Click to expand...
Click to collapse
U r right ...
So... Instead of white pixel there should be one of 3 main colors ( red blue green ) in order to minimize the power consumption .
Using white pixel makes no sense for AMOLED displays ...
does having a red blue or green tinted display make any sense to you ? that is why.
Found this information, maybe it is useful:
An AMOLED doesn't have a backlight at all.
Instead, each little sub-pixel is like a tiny red, blue, or green colored light.
If the screen is instructed to display black, it doesn't need to block any light, it simply doesn't light up any of the little colored sub-pixels.
So theoretically, black pixels save you a lot of power because those pixels can be turned completely off.
However, people sometimes make the mistake of thinking this is a function of brightness—that dark colors like gray are similarly efficient.
Source: http://www.greenbot.com/article/283...interface-really-save-on-amoled-displays.html
Kind regards, Stefan.
zurkx said:
does having a red blue or green tinted display make any sense to you ? that is why.
Click to expand...
Click to collapse
Did you understand the purpose of an energy saving feature ? - I'll tell you. It's for saving energy.
Not for giving you a pretty sight.
Basic information (I thought everybody knew that): AMOLED indeed is like millions of single LEDs. The more illuminate, the more power you need.
Black screen: NO energy consumption. White screen: Highest energy consumption (because white light consists of red, green and blue light). Red, blue or green screen: 1/3 energy consumption, because just one out of each three subpixel LEDs is lit, thus just one out of three subpixel LEDs consumes energy.
So you need ONE LED for displaying a red, blue or green pixel. But you need THREE LEDs for displaying a white or grey pixel, so it's three times the power consumption.
Now again: It's an energy saving feature. With a green, red or blue screen, energy consumption would be 33 %. But with a grey screen, energy consumption is 100 %.
So where's the sense ?
you're incorrectly making the assumption that an active subpixel always draws full power.
if a subpixel is used to display #808080(which should be a very average grey) it should use around 50% of what it uses when used for displaying #FFFFFF(white)
I don't know how power consumption scales compared to brightness, but using multiple subpixels at 25-40% instead of 1 subpixel at 100% would save a lot of power if power consumption scales with an upward curve as brightness increases.
I don't know the exact characteristics of OLEDs or the effect that pentile has on battery usage so I can't exactly tell why it would drain less in B&W than in color, but grey definitely drains less power than white.
1 interesting thing I just found out:
while I've had several OLED devices, the Note 4 is actually the only one I've ever seen that turns off subpixels to display pure black(#000000)
other devices keep subpixels at their lowest active setting, resulting in a faint green/grey glow.(effectively #010101-#101010, as the lowest setting can vary in brightness between different subpixels)
a downside to this is that black causes ghosting, as it takes a subpixel significantly more time to wake up than to increase brightness.
EDIT: I just did some calculations and comparisons, although this example specifically applies to RGB screens you'd notice a similar effect in RGBG screens.
to create the B&W equivalent of a single colored subpixel at 100% brightness you'd need 3 subpixels to be at only 28%.
even if power consumption is linear to brightness it would still mean a drop in display power consumption of 16%
no its for pretending to save energy not to actually save it. it looks like its an eink screen in that mode so people are happy. thats the sense.
Possibly another reason for choosing black and white instead black and green or other colors to have subpixels "age" at similar rate instead one color loosing brightness at faster rate than others.
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