Backlight of Text and Graphic LCD

FYP Starter Pack, ICs, Voltage Regulator, Resistor, Capacitor......

Backlight of Text and Graphic LCD

Postby ABSF » Sun Mar 06, 2011 11:52 am

If the backlite of your 16x2 LCD or GLCD is faulty. Is it possible to repair/replace it or just throw it away and buy a new one?
Where can you get these backlight items?

I have a Yamaha GLCD 240 x 220 with a faulty backlite. The whole thing costs RM370 (LCD+backlite). Can someone suggest a cheaper way to repair it? It works on +5V in series with a 25 ohm resistor. Has anyone tried with a few white LEDs in place of the backlite?

Allen
The next war will determine NOT who is right BUT what is left.
User avatar
ABSF
Professional
 
Posts: 810
Joined: Wed Nov 10, 2010 9:32 am
Location: E Malaysia

Re: Backlight of Text and Graphic LCD

Postby kl84 » Mon Mar 07, 2011 10:46 am

I've never done that. Can try to remove the backlight but keep the white screen. Usually the backlight has a piece of white screen to even the light source, but not all are removable though. Then solder the smd leds at the corners/edges, focus to the center of the lcd. Or may be place the some smd leds in grid under the lcd screen.
User avatar
kl84
Amateur
 
Posts: 166
Joined: Thu Jul 08, 2010 12:14 pm

Re: Backlight of Text and Graphic LCD

Postby ABSF » Mon Mar 07, 2011 11:17 am

Thanks kl84. I'll try it out with a used text LCD that came without backlte and put some SMD LED underneath. But first I have to savage some LED from used printer PCB.

Will post here if it works.

Allen
The next war will determine NOT who is right BUT what is left.
User avatar
ABSF
Professional
 
Posts: 810
Joined: Wed Nov 10, 2010 9:32 am
Location: E Malaysia

Re: Backlight of Text and Graphic LCD

Postby sich » Tue Mar 08, 2011 1:12 am

Wow...going into DIY lcd backlight now. Good good... :D
~> How to ask QUESTIONS the SMART way in FORUM? <~
User avatar
sich
Moderator
 
Posts: 603
Joined: Tue Apr 21, 2009 2:15 pm


Return to Electronic Component

Who is online

Users browsing this forum: No registered users and 3 guests

cron