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Pixel colors and power use

Im trying to find a theme that is efficient and uses low power. I read that there are certain pixel colors that use less energy then other colors.
As an example it uses more energy to produce white pixels then it does to produce black pixels.
I have a SGS vibrant and im trying to determine a good theme that uses low energy ... like black froyo but I want to know if there are other colors that are better in color use then all black.
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Each pixel is represented by 3 subpixels. Each one is 8bit number. The lower the numbers of each subpixel, the lower power used to display pixel and darker colour (You can check it in gimp or photoshop ). But be aware that darker colours won't give You noticeable power savings. More You can achieve by reducing brightness.
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sgtGarcia[PL] said:
Each pixel is represented by 3 subpixels. Each one is 8bit number. The lower the numbers of each subpixel, the lower power used to display pixel and darker colour (You can check it in gimp or photoshop ). But be aware that darker colours won't give You noticeable power savings. More You can achieve by reducing brightness.
Sent from my GT-I5700 using XDA App
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I know that its not going to be a noticible change in power consumption but anything helps when you use your phone in excess of heavily.
I was also reading an article (I think it was done by google) about subpixels. They were cutting out or shutting off specific ranges. Since each pixel has an RGB subpixel structure they would run a power test that eliminated the B from the RGB so only RG showed. Or if the subpixels value was above a certain amount to "Kill It".
Do.you know if there's any app's that allow you to reproduce this subpixel killing?
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ironlood said:
Do.you know if there's any app's that allow you to reproduce this subpixel killing?
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Seriously, I don't even think if I read something 'bout it.
PS. : I've checked Your phone & it got amoled screen type ( I didn't check earlier ) , that means that using darker scheme/theme will probably give You bit more than slightly improvement with battery life.

sgtGarcia[PL] said:
Seriously, I don't even think if I read something 'bout it.
PS. : I've checked Your phone & it got amoled screen type ( I didn't check earlier ) , that means that using darker scheme/theme will probably give You bit more than slightly improvement with battery life.
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Click to collapse
Thanks
Sent from my SGH-T959 using XDA Premium App

With LCD screens how ever, I don't think you would get any power savings at all. OLED screens use very tiny amounts of power. I'd like to see if you can get any measurable improvement.

The Radio -=[WLAN,BT,Phone]=-
WMLongLife
WMLongLife is an automatic 2G/3G band-switching solution. It will keep your device in 2G when you do not need to use 3G, and will switch to 3G automatically when you do need it. For most users, having your device in 2G uses much less battery, and thus your phone lasts longer on a single charge. 2G also usually generates less radiation than 3G........
Running on my HTC Diamond 2 WM6.1 without any problems at all
Then there is the Theme Generator to get your pixels the color you want 'm in...
don't forget to download that tool to the right <g>

New battery preservation technique for new OS development

I just thought of this, but since AMOLED screens disable pixels in order to preserve battery life, and since on average my cellphone display consumption accounts for over 50% of battery drainage...
I thought of this...
Why don't include a setting profile that scales down the viewport of the entire android amoled screen to a portion of it? with all DPI it shouldn't become worse, and at least you can do calls with the phone when it should be dead.
It should be an extreme measure ofcourse, but could help.

Hnmm how to do that???

yes but how to do it?

[Q] screen filter for IPS screen to save battery??

hello friends, i m using CHD A116 from last two month and i am not happy with battery performance. i have done every tweak to make my battery last long.
but when it comes to screen there is nothing to do with it.
i read that AMOLED Screen + screen filter app = reduce battery consumption by screen.
but for IPS screen "screen filter app" does not work. it only make screen darker. power consumption still remain same.
please suggest any app that work for IPS screen phones too..thanks
(and sorry for my bad English)

Do any custom ROMs/Kernels allow you to have full control over screen brightness?

Regardless of ambient light, is there a way to set full brightness on the S6?
Running the stock ROM/kernel, even on full britghtness, the screen can go brighter unless the light sensor detects a high ambient light. I am wondering if its possible to change this.
Currently means PWM is still active on the screen even on full brightness. Same with the note 4 but this was not the case with previous samsung devices. PWM on full brightness is a deal breaker for me so I need to know now or this phone is being sold.

I think it's not really advisable to keep the screen on "extended brightness" mode for longer periods of time, because AMOLED panels wear out over time and this would be a definite way to make it wear out faster. Also it generates a lot of heat. There's a reason why Samsung implemented this adaptive mechanism.

mindfever91 said:
I think it's not really advisable to keep the screen on "extended brightness" mode for longer periods of time, because AMOLED panels wear out over time and this would be a definite way to make it wear out faster. Also it generates a lot of heat. There's a reason why Samsung implemented this adaptive mechanism.
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Thankyou for replying but you did not answer the question at all. I specifically stated this is a deal breaker for me, and that it means that I have to sell this $1000 phone for great effort at a reduced price because of it.
If something is this important to me then I clearly do not care about wearing it out over time. My galaxy s1+s2 has been running on modified AMOLED gamma values for 6 years and they are still fine so I dont care if the displays wears out in 10 years time.
I cannot use the phone becuase the PWM effect means the screen flickers like crazy. It gives me a headache after 1 minute of use. The phone is worthless to me in this state. If i can increase the brightness to full hopefuly the PWM effect stops and I can use a screen filter to lower the brightness, so it will not wear our the display as well.
Lastly why was this moved to Help and Troubleshooting, it is a very important question about the phone. All previous SGS phones have been fine, this is a game changer for the worst.

Yuge said:
Thankyou for replying but you did not answer the question at all. I specifically stated this is a deal breaker for me, and that it means that I have to sell this $1000 phone for great effort at a reduced price because of it.
If something is this important to me then I clearly do not care about wearing it out over time. My galaxy s1+s2 has been running on modified AMOLED gamma values for 6 years and they are still fine so I dont care if the displays wears out in 10 years time.
I cannot use the phone becuase the PWM effect means the screen flickers like crazy. It gives me a headache after 1 minute of use. The phone is worthless to me in this state. If i can increase the brightness to full hopefuly the PWM effect stops and I can use a screen filter to lower the brightness, so it will not wear our the display as well.
Lastly why was this moved to Help and Troubleshooting, it is a very important question about the phone. All previous SGS phones have been fine, this is a game changer for the worst.
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Not really sure where the issue is at, are you stating that when the brightness is reduced you can visibly see the phone flicker? I use an app called Velis Auto Brightness, it gives you way more customization to the brightness level. I like it because it mathematically calculates based off the luminescence (in the environment) of how bright the display should be to show accurate color perception, rather than focusing on batter life as much.
The extra brightness mode on the phone is just a high contrast feature, I haven't found a way to force it on as of yet. I know the phone goes up to 700 nits in sunlight, but the biggest difference is the contrast feature on it.

Brittany_Menton said:
Not really sure where the issue is at, are you stating that when the brightness is reduced you can visibly see the phone flicker? I use an app called Velis Auto Brightness, it gives you way more customization to the brightness level. I like it because it mathematically calculates based off the luminescence (in the environment) of how bright the display should be to show accurate color perception, rather than focusing on batter life as much.
The extra brightness mode on the phone is just a high contrast feature, I haven't found a way to force it on as of yet. I know the phone goes up to 700 nits in sunlight, but the biggest difference is the contrast feature on it.
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I can see the phone flicker even when the brightness is on max setting, because it is not truly the the max brightness of the screen hardware. All the galaxy phones after the s2 did this, except when you turned them to max they stopped flickering. The s6 is the first device that does not allow you manual control over brightness, so I just want to know if custom roms have done this.
IF you don't know what I mean this is how they flicker.
https://www.youtube.com/watch?v=D2f0TZtpRA4
Also you are wrong that the extra brightness is just contrast, it increase the lumens as well as reduces or stops the flicker PWM effect. This is how phones using PWM reduce brightness, by making the screen flicker on and off, whereas in phones like the S2 the actual display dimmed. Some people can see this and are sensitive to it, some people are sensitive to to it but they don't know it, and some people dont see it and aren't affected by it.
But it doesn't look like anyone has made a Kernel that allows for full control over the AMOLED in the S6 so I plan on selling the phone soon.
Lastly I hope someone moves this to a more appropriate section where a DEV can see it, not the basic QA section like how do i change wallpaper.

Yuge said:
I can see the phone flicker even when the brightness is on max setting, because it is not truly the the max brightness of the screen hardware. All the galaxy phones after the s2 did this, except when you turned them to max they stopped flickering. The s6 is the first device that does not allow you manual control over brightness, so I just want to know if custom roms have done this.
IF you don't know what I mean this is how they flicker.
https://www.youtube.com/watch?v=D2f0TZtpRA4
Also you are wrong that the extra brightness is just contrast, it increase the lumens as well as reduces or stops the flicker PWM effect. This is how phones using PWM reduce brightness, by making the screen flicker on and off, whereas in phones like the S2 the actual display dimmed. Some people can see this and are sensitive to it, some people are sensitive to to it but they don't know it, and some people dont see it and aren't affected by it.
But it doesn't look like anyone has made a Kernel that allows for full control over the AMOLED in the S6 so I plan on selling the phone soon.
Lastly I hope someone moves this to a more appropriate section where a DEV can see it, not the basic QA section like how do i change wallpaper.
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Click to collapse
I really don't see the problem. All of the phones today flicker, that's how they show images on the screen. You're not going to find custom roms on this device because AOSP is not working on the phone yet, so if its a deal breaker go ahead and return it and get a new phone.

Yuge said:
I can see the phone flicker even when the brightness is on max setting, because it is not truly the the max brightness of the screen hardware. All the galaxy phones after the s2 did this, except when you turned them to max they stopped flickering. The s6 is the first device that does not allow you manual control over brightness, so I just want to know if custom roms have done this.
IF you don't know what I mean this is how they flicker.
https://www.youtube.com/watch?v=D2f0TZtpRA4
Also you are wrong that the extra brightness is just contrast, it increase the lumens as well as reduces or stops the flicker PWM effect. This is how phones using PWM reduce brightness, by making the screen flicker on and off, whereas in phones like the S2 the actual display dimmed. Some people can see this and are sensitive to it, some people are sensitive to to it but they don't know it, and some people dont see it and aren't affected by it.
But it doesn't look like anyone has made a Kernel that allows for full control over the AMOLED in the S6 so I plan on selling the phone soon.
Lastly I hope someone moves this to a more appropriate section where a DEV can see it, not the basic QA section like how do i change wallpaper.
Click to expand...
Click to collapse
Questions do not belong into Development. It will be clear once you read the respective section rules.. I'm afraid that you'll have to live with the thread in Q&A

Question about heat issue and screen dim

hey guys !
iv got real issue with the flip 4 , i like the brightness to be full and also the extra brightness
but every min that i just do simple stuff like open face book or just playing few sec with the phone my phone begin to warm in the upper side
and the screen dim much , but i only do stuff like few second so whats the point of the brightness
im at home and its not hot in my room.
maybe its defect of the screen or its like that ? cause when i hade s 22 ultra it also dim screen when get warm and the iphone also dim the screen when become hot but in the flip 4 i just do simple stuff and the screen dim then even the brigthness slider when i play with it is not function wtf? can you help me thx

Why are you burning up your retinas? Dim light isn't harmful to your eyes but bright light can be.
There absolutely no reason to use full brightness indoors all the time.
Moreover full brightness greatly reduces battery run time, lifespan as well as display lifespan.
It's best practice to not use these devices in direct sunlight... it will rag them out.
If you're hitting the thermal limits of the device and its battery or cpu core temps are too high ie the device is operating within normal parameters as opposed to a defective thermal sensor all you can do is reduce the load.
By turning down display brightness, reducing bandwidth usage and better optimizing the device to reduce power consumption. What's it's average mAh usage? SOT?
Heat is the inevitable byproduct of power consumption; reduce power consumption to reduce the heat.

blackhawk said:
Why are you burning up your retinas? Dim light isn't harmful to your eyes but bright light can be.
There absolutely no reason to use full brightness indoors all the time.
Moreover full brightness greatly reduces battery run time, lifespan as well as display lifespan.
It's best practice to not use these devices in direct sunlight... it will rag them out.
If you're hitting the thermal limits of the device and its battery or cpu core temps are too high ie the device is operating within normal parameters as opposed to a defective thermal sensor all you can do is reduce the load.
By turning down display brightness, reducing bandwidth usage and better optimizing the device to reduce power consumption. What's it's average mAh usage? SOT?
Heat is the inevitable byproduct of power consumption; reduce power consumption to reduce the heat.
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Click to collapse
man loll i just say i play with facebook whatsapp for just around 2 min and the screen dim all you sayed got nothing to do with it , i see better with max brightness thats why they made it so??? its not possible that after 2 min the screen will dim the phone is new from today and i dont have nothing on it so this strange

nosferatu123 said:
man loll i just say i play with facebook whatsapp for just around 2 min and the screen dim all you sayed got nothing to do with it , i see better with max brightness thats why they made it so??? its not possible that after 2 min the screen will dim the phone is new from today and i dont have nothing on it so this strange
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Is it just those 2 social media apps doing this?
I don't allow any social media or shopping apps on my phones. Trashware at best, spyware and/or malware at worst.

Just general use outside/car mine gets pretty warm and screen dims. Compared to my S22 Ultra it rarely dimmed but also a bigger phone

You likely know this but it bears repeating:
The processor and other circuits are mostly on the upper-half of the phone, near the camera. These chips do get warm, even hot, when applications are in use.
A lithium ion batter, when being charged or discharged, gets warm, even hot, depending the current flow needed to operate the applications, chips, and screen.
An OLED display can get warm, even hot, when lit brightly.
An OLED screen in sunlight will get warm, even hot, even if powered off, because it appears black.
Outside, if the OLED is bright white, it still gets hot because turning on all the pixels takes power, which is expressed as photos (light) and heat.
A very compact phone, like the Flip, has little surface area to expel heat. It doesn't have a fan, so the only way the phone cools is by convection (passing heat to the surrounding air) or transferring heat to your hand or (don't try this) water.
A folded Flip has about one-half the area to dispel heat because the screen cannot effectively radiate heat to the air or your hand.
Some applications use a lot of processing power even if you think you're using them. This is why so many people on this site discuss removing and/or disabling applications.
You can check in Settings --> Battery and Device Care --> tap on Battery --> tap on the graph, and the phone will display which applications are using the batter.
It's my understanding that the processor, battery and screen all have "checks" to ensure they don't get too hot, and Android can throttle these components to prevent wearing them out, burning them out, or causing a fire.
Hopefully others will better understand some of the challenges Samsung has in creating such a unique phone.

wpscully said:
You likely know this but it bears repeating:
The processor and other circuits are mostly on the upper-half of the phone, near the camera. These chips do get warm, even hot, when applications are in use.
A lithium ion batter, when being charged or discharged, gets warm, even hot, depending the current flow needed to operate the applications, chips, and screen.
An OLED display can get warm, even hot, when lit brightly.
An OLED screen in sunlight will get warm, even hot, even if powered off, because it appears black.
Outside, if the OLED is bright white, it still gets hot because turning on all the pixels takes power, which is expressed as photos (light) and heat.
A very compact phone, like the Flip, has little surface area to expel heat. It doesn't have a fan, so the only way the phone cools is by convection (passing heat to the surrounding air) or transferring heat to your hand or (don't try this) water.
A folded Flip has about one-half the area to dispel heat because the screen cannot effectively radiate heat to the air or your hand.
Some applications use a lot of processing power even if you think you're using them. This is why so many people on this site discuss removing and/or disabling applications.
You can check in Settings --> Battery and Device Care --> tap on Battery --> tap on the graph, and the phone will display which applications are using the batter.
It's my understanding that the processor, battery and screen all have "checks" to ensure they don't get too hot, and Android can throttle these components to prevent wearing them out, burning them out, or causing a fire.
Hopefully others will better understand some of the challenges Samsung has in creating such a unique phone.
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thx for your great reply

hyelton said:
Just general use outside/car mine gets pretty warm and screen dims. Compared to my S22 Ultra it rarely dimmed but also a bigger phone
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My flip4 is up and running and no negatives so far. Just slightly warm while I was downloading over wi-fi some 15GB of my music. The overall quality of this phone is pretty good, just like my S22, but it folds to 1/2 of S22 in size. Spent several hrs setting it up and debloating, I always do these things manually. This phone is very responsive and operates smoothly.
On the side note: picking up the delivery from Bestbuy, rather than getting it to my door by Fedex, wasn't a good idea - now I have to look somewhere for an mt box for packing up and shipping my trade-in, Bestbuy just handed to me two small retail packages w/ the phone and silicone cover. They don't handle trade ins.