LCD display question... Refresh rate?

M

mbu

New Member

• Apr 1, 2007

• #1

Does an LCD character display need to be constantly refreshed when something is displayed or it will it hold visible what was displayed until it is either cleared or power shut off?

For example, let’s say I display the words “Hello World”. Will I have to program that in a loop so it is refreshed every so many mSeconds or will the words stay visible until I clear the display? If it needs to be refreshed, what is a good refresh rate so the viewer doesn’t see a flicker?

Thanks…

 

R

raedbenz

New Member

• Apr 1, 2007

• #2

Simply NO

no you dont have,,,,
cause it has internal control unit takes care of refreshing....
just send your data in ASCII code..

 

AllVol

New Member

• Apr 1, 2007

• #3

raedbenz is right.

The LCD will change message only if the power is removed, or you input another message after clearing the screen.

 

M

mbu

New Member

• Apr 1, 2007

• #4

Thanks guys, I appreciate you taking the time to answer my question!

 

Sceadwian

Banned

• Apr 1, 2007

• #5

One thing people forget about these displays is they do have at least a little bit of charactor generator ram, so they can actually be used for simple bit mapped graphics and animation.

 

ikalogic

Member

• Apr 2, 2007

• #6

sure, as long as we all know the difference between lcd and lcd module.. an lcd would need a constant refreshing, and that's what module does, i think it even keeps every pixel energized

 

M

mbu

New Member

• Apr 2, 2007

• #7

ikalogic said:

sure, as long as we all know the difference between lcd and lcd module.. an lcd would need a constant refreshing, and that's what module does, i think it even keeps every pixel energized

Click to expand...

ikalogic,

...so a lcd module is one that comes with its own controller?

 

Last edited: Apr 2, 2007

Sceadwian

Banned

• Apr 2, 2007

• #8

Yes the term 'module' usually implies built in control circuitry. With LCD charactor displays, they all pretty much have the same controller.