How does the LED Cover work?

[daneshpastry]

I'm curious about the technology inside the LED Cover - what powers it? What's behind the display tech? How does the phone send it information?

Does anyone have any insight? I figured NFC explained most of it, but I was surprised to see that it functions fully with NFC being on.

 

[pete4k]

The case gets power from the phone in similar way as wireless charging, or s-pen and those LEDs don't need much. I think it uses NFC for communication and I suspect there are some magnetic sensors that trip and let the phone know the cover is there, so NFC switch off maybe just mean it won't communicate with anything else, but cover.

 

[daneshpastry]

The case gets power from the phone in similar way as wireless charging, or s-pen and those LEDs don't need much. I think it uses NFC for communication and I suspect there are some magnetic sensors that trip and let the phone know the cover is there, so NFC switch off maybe just mean it won't communicate with anything else, but cover.

So I guess some sort of conductive power method? I didn't even think of how the s-pen works - it's more than likely the same method.

 

[cue7578]

Magnets

For clear view LED cover you will notice a round thing on the cover. It is a magnet. On the back cover also sme magnet.

LED works by magnetic induction.

 

[jontr]

The case gets power from the phone in similar way as wireless charging, or s-pen and those LEDs don't need much. I think it uses NFC for communication and I suspect there are some magnetic sensors that trip and let the phone know the cover is there, so NFC switch off maybe just mean it won't communicate with anything else, but cover.

Actually NFC works with the cover on, but only when the cover is open - ie. phone is unlocked. I have no problems with pairing my NFC headphones with the cover on.

 

[sohell]

Does this mean the wireless charging in the note 8 goes two ways?
Not only can it be used to receive a charge, but it can provide a charge, too?

Are there any other mobiles that can do thee same? Or is it a common feature?

 

[rayraynz]

Its using NFC which has a small wireless charging component to it -
The NFC / paywave function on your credit card recieves a small amount of power which powers the chip and they can communicate at 13mhz.
The power supply can be up to 2.3 volts at 6 milliamps. Thats enough to power a few tiny LED bulbs.

As with all wireless power, it is incredibly inefficient and so i see it as just a battery drain. Probably would have been better to use a semi opaque window in the case which just shows the phone screen and positioned a clock to show through, building on the Always-On Display feature.

 

[HuckFinn]

I've been using the LED case for several months now and I did not notice any significant battery drain. Keep in mind the LEDs only light up when you either hit the power button, close the cover or when a notification comes in. They never stay on for more than a couple seconds. Also note that when the case is closed, the AOD is turned off, saving whatever power those pixels are consuming. So AOD always on vs. a few inefficient LED's on for a few seconds. I'm sure it all depends how often the LEDs are turned on as to whether you consume more or less power.

As for just having a window, well then you would not have the touch gestures on the case itself. You can answer or dismiss a call by a swipe on the display of the case.

 

[anwedr]

One thing I noticed when using the wireless charger is that charging stops once the LED case front lights up. Charging resumes once the LEDs disappear.

It's a flaw. Everytime I must flip open the case to do wireless charge.

Sent from my SM-N9500 using Tapatalk

 

[iceepyon]

Probably via the wireless charging pad on the back of the device. Or via the electromagnetic grid that powers the S-Pen

 

[dnmeboy]

"I have no problems with pairing my NFC headphones with the cover on."

NFC Headphones?

 

[millab]

"I have no problems with pairing my NFC headphones with the cover on."

NFC Headphones?

Yeah I have some too - bluetooth headphones that are NFC enabled so you can just tap to pair them - Mine are Sennheiser Momentum Wireless

 

[joluke]

It get conductive energy like the spen... Spen working via NFC LOOOOL. You guys are funny

 

[iceepyon]

It get conductive energy like the spen... Spen working via NFC LOOOOL. You guys are funny

The S-Pen gets it power from the electro-magnetic grid that is under the display. But it has to be close enought to the display to receieve a charge.

 

[doggydog2]

Sadly, Note 9 display won't react when hovering over screen with spen finger.. i remember it worked in old days. anyone can explain technical difference?

 

[renaultmaniac]

i have a note 10 plus and two led cases after the last update both cases work but make strange symbols ..... did reset the phone but nothing changed....