Question about AMOLED displays

[dreamlight]

Dumb questions, but are black wallpapers even useful on non AMOLED displays? Like if it won't do any good it won't do any bad either will it?

[themctipers]

it will save battery as it doesn't have to light up those pixels, as it is OLED

 

grey is not black, only black (complete darkness) will save battery 

[Aytex]

2 minutes ago, themctipers said:

it will save battery as it doesn't have to light up those pixels, as it is OLED

 

grey is not black, only black (complete darkness) will save battery 

They're asking if it saves battery on ips LCD panel.

[themctipers]

Just now, Aytex said:

They're asking if it saves battery on ips LCD panel.

i thought amoled was samsung's branding for oled, no? 

[D13H4RD]

No.

 

Black wallpapers are useful on OLED because OLEDs are self-illuminating and don't need the help of a backlight.

 

LCDs on the other hand require a backlight to shine through when the display is powered on. Even if the display is showing a perfectly black image, the backlight will still shine through, creating a gray-ish image that only the best LCDs attempt to make it closer to actual black. It's because of this that backlight bleed usually only occurs on LCDs.

 

It's because of this that OLEDs have an "infinite" contrast ratio, that is the ratio of the brightest point to the darkest point is extremely high, much higher than IPS LCDs. They do have downsides, though. Some are susceptible to motion blur and their lifespan tends to be significantly shorter due to the use of organic materials, which decompose and break down over time.

[D13H4RD]

Just now, themctipers said:

i thought amoled was samsung's branding for oled, no? 

AMOLED just simply means "Active Matrix Organic Light Emitting Diode".

 

Samsung's trademark is "Super AMOLED", which is their name for an AMOLED panel that includes an integrated digitizer.

[05dfleming]

14 minutes ago, dreamlight said:

Dumb questions, but are black wallpapers even useful on non AMOLED displays? Like if it won't do any good it won't do any bad either will it?

It's not a dumb question at all and it's not useful on LCDs. As on LCD screens (TN, VA, IPS, PLS) the backlight is what is consuming most the power, even with a black image the backlight is still on. Hence why blacks look gray on those screens, but on AMOLED screens each pixel is self-illuminating. Therefore any black content will have those pixels turned off and look truly black (Almost anyway, there is some leakage) Using a black image on an LCD screen won't do any damage

 

If you'd like to read more in-depth about the differences, this article is alright

http://www.androidauthority.com/amoled-vs-lcd-differences-572859/

[dreamlight]

3 minutes ago, 05dfleming said:

It's not a dumb question at all and it won't save any power at all. As on LCD screens (TN, VA, IPS, PLS) the backlight is what is consuming most the power, even with a black image the backlight is still on. Hence why blacks look grey on those screens. Have a black image won't do any damage

 

If you'd like to read more in-depth about the differences, this article is alright

http://www.androidauthority.com/amoled-vs-lcd-differences-572859/

Thanks