2x16 LCD Screen Character Background Problem

[flashabu]

[SOLVED]2x16 LCD Screen Character Background Problem

Hi guys,

I have a strange problem with displaying text/characters on my blue backlit 2x16 LCD screen. The code is working correctly and if I look the screen with an angle, I can read it. However it cannot be read by looking the screen from above. Here I am attaching the photos of my problem:



I don't put those boxes there and I have no idea where they come from Can there be a wrong connection or smth? Any idea?
Thanks a lot

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It was the most quick problem solving of mine It was because of over voltage. I connect a 4.7K resistor through V0, problem is gone If somebody faced such thing, try this.

 

[paulfjujo]

hello,

try to reduce the back light...by adding serial resitor.
and play with contrast adjustment.

 

[MUKESH.K.S]

Re: [SOLVED]2x16 LCD Screen Character Background Problem

Use 10k pot to adjust the contrast

 

[ADGAN]

You haven't adjust the contrast

 

[pjmelect]

I agree, the contrast control is set to high, you should set the contrast for a compromise between readability and speed of response, the adjustment between the two is very fine. You should fit a pot and not a fixed resistor otherwise the speed of response is not optimally set.

 

[bianchi77]

put 10K trimpot to the GND on LCD VEE pin, adjust it until you can see the best contrast, mostly I put 1K resistor to ground to make it fix....so far it works for me...