LCD displays are much slower than LED displays so I doubt you will have a
problem.

At 10:15 AM 4/28/02 -0400, you wrote:
>Are you clearing the display before you write the screen again?  If so,
>then there is a period of blank screen which may beat against another
>light source.  Since it's fairly far away from 120/60/30Hz then the
>effect shouldn't be too bad, but it'll attract attention and be a little
>distracting.
>
>I would just write to all the memory locations and not erase the display
>each time.  If the display hasn't changed since the last write then
>there will be no noticable beating at all.
>
>-Adam
>
>michael brown wrote:
>
>>I'm doing a project now that may actually end up being used in the real
>>world on a wide scale.  It's the firmware for an escape-sequence processing
>>serial interface to a Hitachi based 2line X 20char LCD text display.  The
>>program is written in C and uses a RAM based virtual display.  This virtual
>>screen is periodically "painted" to the LCD.  Right now I am "painting" the
>>LCD every 50ms (20 full screen paints/second) when there is nothing else to
>>do.
>>
>>Now, my question is, "Is this advisable?".  IOW, is it ok to strobe the
>>display rapidly?  It looks ok, under incandescent lighting, but I worry that
>>fluorescent lighting may cause "beat" problems.  Should I just change the
>>code to only paint the screen when necessary?  I did it this way thinking
>>that
>>watch-dog timeouts or other reset issues could be handled invisibly, since
>>RAM doesn't change on a reset (8052 type).
>>
>>--
>>Michael Brown
>>Instant Net Solutions
>>www.KillerPCs.net
>>
>>"In the land of the blind, he who has one eye is king"
>>
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>>
>>
>
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Larry G. Nelson Sr.
mailto:L.Nelson@ieee.org
http://www.ultranet.com/~nr

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