LCD backlighting

[lukeh182]

is it possible to backlight an LCD that is not backlit? it is just a 20x4 text LCD. is it possible to use LEDs or something to make it shine? i don't have it yet so i can't try it out but i was just wondering if anyone knew?

 

[specialk]

It can be done using either EL sheets (check out allelectronics.com for some kits) or by side-lighting the screen using LEDs; however it would be cheaper and easier just to buy a backlit 4x20 LCD off of eBay for $15. You risk spending too much, having a crappy result if you do it yourself, and wasting time (how much do YOU value your time?)

-special [k]

 

[lukeh182]

i couldn't find any backlit LCDs on ebay. the one i got wasn't backlit but it only cost $7 plus $5 shipping. can you direct me to the backlit ones?

 

[specialk]

Keep in mind that these are auctions, not fixed price, so the prices can (and do) often go up.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3806007961&category=26206
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3805535945&category=26206
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3805727263&category=26206
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3805727242&category=26206
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3805198560&category=26206

In the future you can find them here:
Home > All Categories > Business & Industrial > Electronic Components > Semiconductors, Actives > LCDs, Displays

[edit] The EL backlit displays require a seperate inverter I believe, however, the color is usually more uniform than LED backlighting. [/edit]

-special [k]

 

[lukeh182]

thanx, i guess i just didn't know where to look!

 

[camay123]

Buy a LED baclight LCD. Not EL.

They last longer. ~50000hrs for LED agains ~3000hrs for EL.

 

[crystalfontz]

lukeh182 wrote: "is it possible to backlight an LCD that is not backlit? . . ."

Usually not, because a non-backlit display will have a reflective rear polarizer that will not allow light from behind the display to show through.