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PostPosted: Tue Jan 13, 2009 14:57 
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Joined: Tue Jan 13, 2009 14:01
Posts: 2
Hi everyone here in New year....

i would like to ask very noob like query for a QVGA type lcd..
I have one of such a LCD make samsung, its datasheet describes that its backlight LED's current capacity is 15mA nominal and 20 mA maximum..
I am driving its backlight with 8mA by using 12 volt supply in series with 50 ohm series resistor ,, my question is:
Does it make any worse effect to the LCD operation by driving it with 8 mA supply backlight which is lesser than 15mA (its nominal rating) ?


Thanks and regards!!!


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PostPosted: Wed Jan 14, 2009 3:16 
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Joined: Sun May 05, 2002 22:05
Posts: 2063
Location: Lappeenranta, Finland
Using lower current that what is specified shouldn't damage it. In fact it should give the white LEDs longer lifetime.


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PostPosted: Thu Jan 15, 2009 7:11 
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Joined: Tue Jan 13, 2009 14:01
Posts: 2
Thanx for the quick reply...

It means, using lower current does not cuase any malfunctioning of LCD e.g. image can not displayed on the LCD screen.
right??

Regard!!!


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