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Messages - bidbid21

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1
Character LCDs / Re: NHD-0216K1Z-NSW-BBW6L contrast problem
« on: January 03, 2018, 07:44:07 AM »
Hi,
After many search, I think that the problem is caused by electrostatic discharge.
It is possible that connect iron display frame to the ground?
Thanks

2
Character LCDs / Re: NHD-0216K1Z-NSW-BBW6L contrast problem
« on: December 13, 2017, 02:56:25 AM »
The display is assembly on electronic card that is RFID Reader. This reader is powered by ethernet PoE. The supply of display is regulared by LD50 regulator + capacitor and zener diode (for protect)
The stikers on lcd display has browned because I think the chip on display heated.
I have measure the temperature of display after 1hour of use in real condition. I have got 38°celsius in touch display chip.
For tests, I have disassembly display (chip and LCD Cell) and i have reverse old LCD cell to new PCB and new LCD cell to old PCB
old LCD cell on new PCB (i noticed dead pixels
new LCD cell on old PCB

3
Character LCDs / Re: NHD-0216K1Z-NSW-BBW6L contrast problem
« on: December 12, 2017, 09:23:20 AM »
Actually, the voltage of display is 5v(by 7805 regulator) and contrast 0.9v (by the tension divider bridge between 5v and ground)
I saw that the stikers on the chip has browned.
The display was use in building (ambient temperature)
burned stickers
display after set V0 to Ground

4
Character LCDs / NHD-0216K1Z-NSW-BBW6L contrast problem
« on: December 12, 2017, 02:34:57 AM »
Hi,
Actually, I have a problem with display NHD-0216K1Z-NSW-BBW-L.
After about one mouth for use, the contrat of this does not work anymore.
Half charactere are displayed and se screen twinkles.
Do you have a solution?
Thanks

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