On Dec 30, 7:10*pm, "PCool" wrote:
There is an interesting discussion here athttp://www.postfrontal.com/forum/topic.asp?TOPIC_ID=5589&whichpage=6
with a lot of pictures I have taken out of new PNAs with 800-900 nits
displays.

This PNA has also a spare RS232. *I am searching for a Dell Streak to
compare, but it is was gone out of production a few months ago.
With the sun in front of us, and not in the back, brightness is the only
help to make the screen visible at all.

I am also about to review the Holux 61CS, which is a long awaited unbranded
device with a very good visibility.
(I dont sell them!)

paolo

I think the following exerpt from a Gliding Internation Article may
clear up many misconceptions that high brightness makes a display
sunlight readable. Brightness minimually affects the sunlight
readability. Contrast ratio is the most important factor.

The Craggy Aero Ultimate Le aviation quality display sets the standard
in sunlight readability it delivers a radically high level of screen
brightness that results in unparalleled picture sharpness and
vividness. The VHB LED backlight in the LCD module consumes only 4.5
Watts at full brightness. The LCD screen temperature is quite small
and there are few thermal management issues. The LCD module displays
a VGA (640 x 480) image.
Contrast ratio is the most important factor in high and full sunlight
applications. Contrast ratio of a display is defined as the luminance
(brightness) ratio between a brighter state and a darker state. The
color LCDs “white” state and “black” state are used to calculate the
contrast ratio.
Contrast ratio = CR = luminance of the “white” /luminance of the
“black”.
If white and black are equally bright, then CR = 1 and the display is
not readable. Due to the coatings applied to the display the contrast
ratio of the Ultimate Le is extremely high. The high contrast ratio
makes the view in direct sunlight only slightly dependent on the
backlight intensity. Even at the low backlight setting the display
is totally readable in full sunlight. These characteristic contribute
to the overall superior direct sunlight performance in the cockpit.
No longer do you need to run software in the white or no terrain mode,
the color and clarity are vibrant in full sun.

http://www.craggyaero.com/ultimate_le.htm


Richard
www.craggyaero.com