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Vertical line of dead pixels on 50g LCD
04-06-2021, 12:59 PM
Post: #9
RE: Vertical line of dead pixels on 50g LCD
Thanks for your all reply.

(04-06-2021 09:01 AM)SammysHP Wrote:  The display controller used the the HP 39/49/50 etc. seems to have problems driving all columns with the same voltage independent of its content. Maybe using the grayscale mode makes it worse. Also contrast is set too high which makes it more obvious.
I set contrast high to show problem obviously.

(04-06-2021 07:34 AM)franz.b Wrote:  
(04-06-2021 03:01 AM)BINUBALL Wrote:  I found this thread while googling. When I use newRPL, If there are many numbers and string on stack like below. There are vertical light black line around numbers and string.
[Image: 20210406_105856.jpg]
I feel uncomfortable with this. Is this dead pixels? I've tested 50g's screen pixels by making 131×80 black grob. But I think every pixel is ok on this test.
Code:
::
80 131 MAKEGROB INVGROB
;
@

it seems to me a problem of flat batteries and / or badly adjusted contrast ...
Yes, my 50g has all two problem. 5.0V low battery and high contrast..

S.Korean / 50G | fx-570EX | 200LX
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RE: Vertical line of dead pixels on 50g LCD - BINUBALL - 04-06-2021 12:59 PM



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