acertimeline team mailing list archive

[Michael <m.barren@xxxxxxxxx>]

Paul,

To my understanding, the backlight controller of all LED lit screens use
high frequency flashing of the LEDs with different on-times, to adjust the
(perceived) brightness. So for instance, at 100% brightness, LEDs are on at
all times (no flickering). At 80% brightness, LEDs are flashing while being
on for 80% of time and off for 20% of time. As the brightness decreases, the
flickering increases. All that said, due to the high frequency of flashing,
it's usually difficult to detect the flickering without paying special
attention. If your screen is annoying you, there might be something wrong
with it.

On Mon, Dec 28, 2009 at 11:03 AM, Pål Levold <paal.levold@xxxxxxxxx> wrote:

> When I dim the brightness of my screen it starts flickering a bit when
> going below 34% (on the four lowest steps). It's a somewhat high frequent,
> small change in brightness so it's a bit hard to spot at once. The lower I
> set the brightness, the more significant it gets.
> Is this a hardware problem that occurs no matter what or is it something I
> can do to fix it? Anyone knows if this occurs in Windows too?
>
> Sincerely
> Paul
>
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