Here are my suggestions:<div><br></div><div>Perhaps you have an "inverted" display? Coloured dots on a black background?<div><br></div><div>Blue light tends to be perceived darker than other light.</div><div><br></div><div>Your LCD contrast setting is too dark.</div><div><br></div><div>HTH,</div><div><br></div><div>Andrew<br><br>On Sunday, 9 August 2015, Robin Gilks <<a href="mailto:robin@gilks.org">robin@gilks.org</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Greetings all<br>
<br>
I've only ever used green and yellow HD44780 style character mode LCDs and<br>
they have had a backlight (which draws a LOT of current) but been<br>
perfectly readable without the backlight being on.<br>
<br>
I'm now playing with a blue one and the backlight has to be on to read it<br>
- is this normal for blue LCDs ?<br>
<br>
I haven't checked the current yet (rebuilding alpha hardware into beta<br>
stage prototype) but I'm guessing its quite low since modern blue LEDs<br>
seem to be very efficient.<br>
<br>
Cheers<br>
<br>
--<br>
Robin Gilks<br>
<br>
<br>
<br>
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