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« on: August 05, 2014, 06:24:56 PM »
Hello again,
Here is an update on what I have tried and the results of those attempts.
1. Changing Display
I got another identical display, but it did the same thing.
2. Changing the controller
I also have used an Arduino Mega 2560 to run the display. This was running completely different code than the Microchip controller, but the same initialization sequence. Same results.
3. Different values for Initalization.
I have programmed the displays to cycle through various initialization parameters, specifically the contrast current, contrast current range, precharge compensation, precharge voltage, and the VcomH voltage. I was able to observe the changes in the display but none of them ever removed the lines completely.
The best Screen image has been when I use :
Current Range: 0x86
Contrast Current: 0x3F
Precharge Compensation: 0x02
Precharge Voltage: 0x10
this is seen in the image "Menu Navigation". However, the same settings with a display screen which is not as full yields the same streaking lines. The displays also look best when the majority of the screen is on. When there are only a few pixels on, it becomes worse.
4. As for the Display offset, I actually need to use that functionality of this display, but even when it is zero, the streaks occur.
Any more thoughts?