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These OLEDs are passively drawn, which means that each line is lit at once. If you have a line with almost all the pixels lit it wont be as bright as a line with only 50% or less lit up.
Hello Bill,

Unfortunately because these are Passive Matrix OLEDs the brightness of the pixels can vary based on how many pixels are on in a row.
The brightness will be higher if you only have a few pixels lit, as opposed to having the whole row on.
OLEDs / NHD-3.12-25664UCY2 display - inconsistent pixel brightness in same areas
« Last post by bill on May 23, 2018, 09:11:33 AM »

    Using the NHD-3.12-25664UCY2  (256 x 64) using the 4-wire interface I have no problems sending full screen images and displaying them.  However all the images and patterns I send use the same grayscale value.  However, on the display some of pixels vary in their grayscale/intensity?  It's always the same pixels too.  I have tried two different displays with same results.  I would think if its noise that the pixels would be random but they are always the same. I checked the initialization sequence and it matches example in the data sheet.

    I have attached two images.  One with a picture and one with all the pixels set at the same greyscale level  (0x04).   On the image with all set to the same greyscale you can see a rectangle area at the left and right side of the LCD - but I am sending all the same greyscale values.  With the picture on some of the pixels are of different brightness/grayscale.

Please help.


TFTs / Re: EVE2 Startup for 7" Display
« Last post by warriorofwire on May 22, 2018, 01:18:23 AM »
Thanks for the reply!  I had a bug with my vertex2ii command bits.  I realized this when I was able to tweak the background color.  It's now working as expected.

I'm building a more trimmed, straightforward library for my simple consumption (no ifdefs).  The next hurdle is bitmap display!
Graphic LCDs / Re: NHD-C12864B2Z-RN-FBW on Arduino Zero
« Last post by Ted_M on May 21, 2018, 12:00:37 PM »
Hi Casey,

Have you been able to resolve this?
TFTs / Re: Display Font related issue
« Last post by Ted_M on May 21, 2018, 11:49:42 AM »
Hi Darshana,

I hope you have resolved this.  If not, please take a look at the U8glib for some examples:

Vacuum Fluorescent Displays / Re: M0216SD-162SDAR2-1 Jumper Settings
« Last post by Ted_M on May 21, 2018, 11:41:01 AM »
Hi kpengwin,

Have you been able to resolve this issue?
Graphic LCDs / Re: NHD-320240WG-BXTFH-VZ# initialization problem
« Last post by Ted_M on May 21, 2018, 11:37:49 AM »
Hi Vinvald,

Have you been able to resolve this issue?
Graphic LCDs / Re: NHD-C160100DiZ-FSW-FBW won't display anything
« Last post by Ted_M on May 21, 2018, 11:35:50 AM »
Hi Ronnie,

Have you been able to resolve this issue?
TFTs / Re: NHD-7.0-800480EF-ASXN Unable to get LCD to display colors
« Last post by Ted_M on May 21, 2018, 11:34:17 AM »
Hi Tom,

Have you been able to resolve this issue?
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