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  1. #1
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    lcd display problem with unclear characters

    I have lcd 16*2 doesn't show characters clearly. to see it i have to look from sharp angle, i can't see characters when i look perpendicular. what is the problem?
    Vcc=4.3v

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  2. #2
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    Re: lcd display problem with unclear characters

    Not sure if the display is designed to work with 4.3V single supply. The data sheet should tell. In any case, the circuit lacks a means to adjust Vee for best contrast.



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  3. #3
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    Re: lcd display problem with unclear characters

    Hi.

    I agree, most probably VCC, the missing contrast circuit and thus the contrast may be the problem.

    But also write timing may cause unclear characters. Thus I recommend not to (re)write a character more often than twice per second.

    At least you may try this to see if something will change..

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  4. #4
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    Re: lcd display problem with unclear characters

    The voltage of a LCD is critical if the 5V is down by only a few hundred milivolts can result in no display or very bad contrast on most displays. If you increase the supply voltage you will need a contrast control.



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