Perhaps you should call them.  Their "history of the LCD key" (which
conveniently leaves out mention of NKK) has this line at the end:

[E=B3] introduces the SI series of inverse LCD switches for avionics
applications with improved sunlight readability and SM series for
military applications with extended command set and environmental
parameters.

So I imagine they have a solution for the daylight readability concern.

-Adam

On 9/27/06, Carey Fisher <careyfisher@ncsradio.com> wrote:
> I started to use them in a new design (not the NKK ones, the higher
> resolution ones from E3: www.e3-keys.com ).  But then I noticed they
> washed out (first color, then text) real easy in any kind of daylight.
> Since I do mobile applications, these were out.  Too bad, too:  I was
> looking forward to dynamic switch labeling on our product instead of the
> customer having to use sticky labels.
> Carey

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