Dual Color 7-seg LED display ??

I was looking at the chart here:

http://en.wikipedia.org/wiki/Color_blindness

that shows what a rainbow looks like to people with various forms of
color blindness. It seems that if one were to make the data in a
two-color display either blue and orange or indigo and green, one would
cover all the bases and have a combination that would be easily
distinguished by those with various types of color blindness, except of
course the kind you mention that is a complete lack of color perception.
I remember reading that some military radar screens used blue
and orange as a color combination, but I think that was because some
study indicated it was the color combination easiest to stare at for
long periods of time...

Bitrex wrote:
D Yuniskis wrote:
Bitrex wrote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.

Unless you're colorblind.

Is there a type of colorblindness that makes it difficult to
distinguish between green and yellow? I thought the main kinds were
blue-yellow and red-green...

Yes, achromatopsia. Though *considerably* less common than R-G.

Note that color blindness may also be a temporary condition
brought on my illness (migraine, etc.) as well as "acquired"
with age. It can also affect only *portions* of your
field of vision.

I was looking at the chart here:

http://en.wikipedia.org/wiki/Color_blindness

that shows what a rainbow looks like to people with various forms of
color blindness. It seems that if one were to make the data in a
two-color display either blue and orange or indigo and green, one would
cover all the bases and have a combination that would be easily
distinguished by those with various types of color blindness, except of
course the kind you mention that is a complete lack of color perception.

Even with particular types of color blindness (red-green, for
example), you can chose the colors such that a color blind person
can perceive the *difference* -- though they may not be able to tell
which color is which.

E.g., ages ago, when my Dad applied for his (initial) driver's
license, the examiner showed him a stoplight and asked the
meaning of each (lit) "indicator". At one point, he rotated the
"display" sideways instead of the familiar vertical orientation.
Not knowing which end was the "top", my father couldn't
tell "stop" from "go".

I remember reading that some military radar screens used blue
and orange as a color combination, but I think that was because some
study indicated it was the color combination easiest to stare at for
long periods of time...

Or, perhaps the phosphors had the longest persistence?

All the comments in this thread were interesting and useful.

But, I have not found any dual-color 7-seg LED displays.

Has anyone run across a display like this, with any two colors ??

don

don <don> <@invalid
wibbled on Thursday 11 February 2010 03:07

All the comments in this thread were interesting and useful.

But, I have not found any dual-color 7-seg LED displays.

Has anyone run across a display like this, with any two colors ??

don

Eh? I gave you a reference to a Kingbright part, R/G and therefore yellow
supported.



Yes, Thanks, I saw that.

Tim Watts wrote:
don <don> <@invalid
wibbled on Thursday 11 February 2010 03:07

All the comments in this thread were interesting and useful.

But, I have not found any dual-color 7-seg LED displays.

Has anyone run across a display like this, with any two colors ??

don

Eh? I gave you a reference to a Kingbright part, R/G and therefore yellow
supported.



Yes, Thanks, I saw that.

At 1.5" tall, its an over kill for the from panel.

I would hope others have seen more out in the wild.

don

On Thu, 11 Feb 2010 07:14:59 -0700, don <don> wrote:

Tim Watts wrote:
don <don> <@invalid
wibbled on Thursday 11 February 2010 03:07

All the comments in this thread were interesting and useful.

But, I have not found any dual-color 7-seg LED displays.

Has anyone run across a display like this, with any two colors ??

don
Eh? I gave you a reference to a Kingbright part, R/G and therefore yellow
supported.



Yes, Thanks, I saw that.

At 1.5" tall, its an over kill for the from panel.

I would hope others have seen more out in the wild.

don

I've seen plenty of them in various sizes (like the common 14.22mm).

But if you just want onesies-twosies, you should start searching
distributors and such like.

Thats the problem, I have been googleing for days.

Tim Watts wrote:
don <don> <@invalid
wibbled on Thursday 11 February 2010 03:07

All the comments in this thread were interesting and useful.

But, I have not found any dual-color 7-seg LED displays.

Has anyone run across a display like this, with any two colors ??

don

Eh? I gave you a reference to a Kingbright part, R/G and therefore yellow
supported.



Yes, Thanks, I saw that.

At 1.5" tall, its an over kill for the from panel.

I would hope others have seen more out in the wild.

don

Yes, only the larger displays are dual color.

don

don <don> <@invalid
wibbled on Friday 12 February 2010 01:15


Yes, only the larger displays are dual color.

don

Weird. I'm also surprised that noone seems to do RGB displays either.
There's even a webpage somewhere of someone who made their own by butchering
a cheap device and replacing the LEDs with surface mount RGB ones...

LOL, yes I saw that as well.

Tim Watts wrote:
don <don> <@invalid
wibbled on Friday 12 February 2010 01:15


Yes, only the larger displays are dual color.

don

Weird. I'm also surprised that noone seems to do RGB displays either.
There's even a webpage somewhere of someone who made their own by butchering
a cheap device and replacing the LEDs with surface mount RGB ones...

LOL, yes I saw that as well.

Thats one of the reasons I stared looking for a dual-color 7-seg LEDs

don

On Fri, 12 Feb 2010 03:36:00 -0700, the renowned don <don> wrote:

Tim Watts wrote:
don <don> <@invalid
wibbled on Friday 12 February 2010 01:15


Yes, only the larger displays are dual color.

don
Weird. I'm also surprised that noone seems to do RGB displays either.
There's even a webpage somewhere of someone who made their own by butchering
a cheap device and replacing the LEDs with surface mount RGB ones...

LOL, yes I saw that as well.

Thats one of the reasons I stared looking for a dual-color 7-seg LEDs

don

Did you try "staring" at Digikey?


Best regards,
Spehro Pefhany

Spehro Pefhany wrote:
On Fri, 12 Feb 2010 03:36:00 -0700, the renowned don <don> wrote:

Tim Watts wrote:
don <don> <@invalid
wibbled on Friday 12 February 2010 01:15


Yes, only the larger displays are dual color.

don
Weird. I'm also surprised that noone seems to do RGB displays either.
There's even a webpage somewhere of someone who made their own by butchering
a cheap device and replacing the LEDs with surface mount RGB ones...

LOL, yes I saw that as well.

Thats one of the reasons I stared looking for a dual-color 7-seg LEDs

don

Did you try "staring" at Digikey?


Best regards,
Spehro Pefhany

Just the single word "staring" on Digikey search shows "no records".

Did I spell that right ??

don'

On Fri, 12 Feb 2010 10:06:20 -0700, don <don> wrote:

Spehro Pefhany wrote:
On Fri, 12 Feb 2010 03:36:00 -0700, the renowned don <don> wrote:

Tim Watts wrote:
don <don> <@invalid
wibbled on Friday 12 February 2010 01:15


Yes, only the larger displays are dual color.

don
Weird. I'm also surprised that noone seems to do RGB displays either.
There's even a webpage somewhere of someone who made their own by butchering
a cheap device and replacing the LEDs with surface mount RGB ones...

LOL, yes I saw that as well.

Thats one of the reasons I stared looking for a dual-color 7-seg LEDs

don
Did you try "staring" at Digikey?


Best regards,
Spehro Pefhany
Just the single word "staring" on Digikey search shows "no records".

Did I spell that right ??

don'

Maybe spelt/spelled "Stanley".

This is a 1" tall Red/Green 7-seg LED.

Spehro Pefhany wrote:
On Fri, 12 Feb 2010 10:06:20 -0700, don <don> wrote:

Spehro Pefhany wrote:
On Fri, 12 Feb 2010 03:36:00 -0700, the renowned don <don> wrote:

Tim Watts wrote:
don <don> <@invalid
wibbled on Friday 12 February 2010 01:15


Yes, only the larger displays are dual color.

don
Weird. I'm also surprised that noone seems to do RGB displays either.
There's even a webpage somewhere of someone who made their own by butchering
a cheap device and replacing the LEDs with surface mount RGB ones...

LOL, yes I saw that as well.

Thats one of the reasons I stared looking for a dual-color 7-seg LEDs

don
Did you try "staring" at Digikey?


Best regards,
Spehro Pefhany
Just the single word "staring" on Digikey search shows "no records".

Did I spell that right ??

don'

Maybe spelt/spelled "Stanley".

This is a 1" tall Red/Green 7-seg LED.

Digikey Part#: 404-1134-ND

I will try a couple out.

thanks

don