N900 Screen burnout possibility when always on?
 

I've recently set a profile on my phone where I have about 30-40 contacts on the desktop, so I can see if they are online.

Obviously with the screen turning off this is a bit annoying.

I know there is an option to leave the screen on whilst it charges, but I'm unsure if this will drastically shorten the life of my display...

Does anyone know if this is the case, please?

Re: N900 Screen burnout possibility when always on?
 

Good question :) well obviously if it runs 24/7 then yeah just like any other LCD screen ...if you keep it on for hour or so I think it wont damage the device just remember to keep brightness on medium or even low since highest brightness generates a lot of heat which is bad for other components as well ;)

btw there is an app called simple brightness applet which can help you to keep display on even when you're not charging the device

Re: N900 Screen burnout possibility when always on?
 

The lifetime of the screen - even if always on - is much longer than the useful lifetime of the device.

10-years is typical.

Re: N900 Screen burnout possibility when always on?
 

Cheers guys,

HellFlyer, I know about the app, but I'll only have it on this profile when it's charging.... so not something I need.

Flynx, I would need a bit of assurance before I trust that so blindly. Hey, you could be right, and it's a direct answer to my question... maybe I'm just a chicken...

Re: N900 Screen burnout possibility when always on?
 

Well, you can divide most display technologies into two systems - the imaging system and the light engine. The screen will fail when one of those two systems fails first.

The N900 screen is like an LED TV, it uses an LCD panel (TFT) to make the image and an array of white LEDs to make light.

LCDs are very robust (provided you don't crack it). You can completely melt a digital watch in an oven and the LCD will still work. The LED backlight would be the limiting factor - except they used multiple LEDs. So even if one fails, the others will still illuminate the screen.

This is not true of the AMOLED screens used on HTC phones. Organic screens have a shorter lifespan. (AMOLEDs ues less power, so they sacrifice long-term display life for short-term battery life.)

I buy Nokia because of their hardware. Not only the most feature-packed, but also incredibly rugged. I leave my screen on when charging because I use my phone as an alarm clock. Because it's TFT LCD with LED backlight, I have no hesitation about doing so.

Say it shortened the life of the display from 10 years to 8 years. Do you think you will still be using your N900 in 2018?

Re: N900 Screen burnout possibility when always on?
 

abso!utely spot on well put too.

Re: N900 Screen burnout possibility when always on?
 

Very good indeed :) So from now on I gonna use my N900 as a regular TV :D

Just two questions...what's the lifetime of LED? and do you know how many LEDs light up N900?

Re: N900 Screen burnout possibility when always on?
 

Thanks to the stringent control of all hardware products, LCD should have MTBF (mean time before failure) of at least 50000 hours in order to sell to major developed districts. If you're not purchased the hardware in some distant under-developing countries, you can safely assume that it won't fail within 50000 hours of constant use.<Br><Br>

Flynx is right, you might not see your N900 after 5 years. so 50000 hours ~ 5.7 years should be fine for you.

Re: N900 Screen burnout possibility when always on?
 

You make a good point. The N900 is overclockable, which makes thermal management critical. But that's a whole other discussion.

I don't know the lifetime of the LEDs used in the N900. They are measured in hours. One year is approx 9,000 hours. A quick google search turns up numbers between 50,000 and 100,000 (5-10 years). Personally, I have never seen an LED fail from old age.

I took my N900 apart. I think I remember the LCD screen and backlight being combined in one aluminum-enclosed unit. So you'd have to actually disassemble the screen to find out how many LEDs were in there. Or research it on the 'net.

Re: N900 Screen burnout possibility when always on?
 

Thanks for clarifying guys , its really good to know :) not that I dont trust Nokia's hardware its just that I want to know. In fact I was using Nokia phones for 7 years and never had hardware problem with them except a horrible joystick of N73 :D

Re: N900 Screen burnout possibility when always on?
 

Also, when they say "50,000 hours MTBF", they are referring to continuous use.

If your display is only on 6 hours a day (25% of the time), that translates to 20 years before failure.