Worth switch off OLED display on MP3 players?

[Jim]

I have an MP3 player powered from an AAA cell and with an OLED display.

There is a setting which lets me dim the display after a selectable
delay (up to 15 seconds).

I believe the power consumption of OLED is at least as low as LCD. So
it seems to me that if I leave the display on permanently then I would
use negligible extra power from the battery. Is this correct?

Is there another reason to want to dim the display?

Maybe an image displayed for a long time would burn itself into the
display as a ghost image. Would this happen to a noticeable extent?

So overall, is it alright to set my MP3's OLED display to ALWAYS ON?

 

[Pooh Bear]

Jim wrote:

I have an MP3 player powered from an AAA cell and with an OLED display.

There is a setting which lets me dim the display after a selectable
delay (up to 15 seconds).

I believe the power consumption of OLED is at least as low as LCD. So
it seems to me that if I leave the display on permanently then I would
use negligible extra power from the battery. Is this correct?

Is there another reason to want to dim the display?

Maybe an image displayed for a long time would burn itself into the
display as a ghost image. Would this happen to a noticeable extent?

So overall, is it alright to set my MP3's OLED display to ALWAYS ON?

It's up to you but OLEDs use *much* more power than LCDs.

Graham

 

[Dave Platt]

I believe the power consumption of OLED is at least as low as LCD. So
it seems to me that if I leave the display on permanently then I would
use negligible extra power from the battery. Is this correct?

Nope. OLEDs do use more power than a reflective LCD. They're
probably more fairly compared to a transmissive LCD with an active
backlight. Since AAA cells are pretty wimpy, you'll probably extend
your MP3 player's run time significantly by dimming the display.

Maybe an image displayed for a long time would burn itself into the
display as a ghost image. Would this happen to a noticeable extent?

The hardware engineers I work with tell me that OLEDs do have a
burn-in problem, if they're used steadily and if the average
brightnesses of the individual pixels is not kept equal over the long
term. So, yes, you may reduce burn-in/ghosting problems on your
display by dimming it whenever feasible.

--
Dave Platt <dplatt@radagast.org> AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

 

[Jim]

Jim wrote:

I have an MP3 player powered from an AAA cell and with an OLED
display.

There is a setting which lets me dim the display after a
selectable delay (up to 15 seconds).

I believe the power consumption of OLED is at least as low as LCD.
So it seems to me that if I leave the display on permanently
then I would use negligible extra power from the battery. Is this
correct?

Is there another reason to want to dim the display?

Maybe an image displayed for a long time would burn itself into
the display as a ghost image. Would this happen to a noticeable
extent?

So overall, is it alright to set my MP3's OLED display to ALWAYS
ON?

On 20 Jun 2006, Pooh Bear wrote:

It's up to you but OLEDs use *much* more power than LCDs.

I went and took another look and saw that passive OLEDs (which I
portbably have got in my MP3 player) take more power than active
OLEDs.

Also seems that some pople compare OLED with LCD + backlight
(backlight is about half the total power used)
http://www.wave-report.com/tutorials/oled.htm

This page ignore backlighting "OLEDs do not require backlighting,
they consume much less power than LCDs. Most of the power in an LCD
is consumed by the backlight."
<http://www.electronicproducts.com/ShowPage.asp?
FileName=onestopdisplays.jun2006.html>

Am not too sure what the following article concludes about power but
it seems very relevant.
<http://powerelectronics.com/power_management/led_drivers/power_power
ing_passive_oled/>