What is the A and K on a character LCD?

Post Reply
Xtrabuilds
Posts: 6
Joined: Wed Sep 12, 2018 6:19 pm

What is the A and K on a character LCD?

Post by Xtrabuilds » Tue Oct 30, 2018 9:18 pm

What does the A and K on a character LCD stand for? I know that is how you power the LCDs backlight, but which is positive and which negative?

LCD_Designs
Posts: 262
Joined: Thu Feb 22, 2018 9:49 pm

Re: What is the A and K on a character LCD?

Post by LCD_Designs » Mon Nov 05, 2018 3:02 pm

A is the positive side of the LED https://focuslcds.com/journals/el-backl ... ting-edge/ backlight, K is the negative or ground.
If you reverse the wires/polarity the display will not light up.

Note: LED are the most popular. In the older days, EL was around and provided a nice even light, but there were issues with AC and noise and shorter half-life, so all new designs are now LED.

Post Reply