Flexible Grayscale OLED Brightness issue-brightness/contrast varies on different session

Hi All,

I just brought MPN: LCD-14606 Flexible Grayscale OLED and I uploaded both Example 1_text and Example 2 - Graphics code

https://learn.sparkfun.com/tutorials/fl … -guide/all

I used Arduino Uno as my micro-controller and connections are as follow:

VIN->3.3V

GND->GND

RES’->pin 9

SDIN->pin11

SCLK->pin13

CS’->pin 10

I can see the Monkey image on the OLED. However, the top 1/4 session is much brighter than the other (see attached picture).

I also tried to call .setContrast() to change the contract from 0 to 255 (see attached video). The brightness will be changed globally and the top 1/4 session is still the brightest.

uint8_t i;

for (i=0;i<255;i++)

{

flexibleOLED.setContrast(i);

delay (100);

}


Can you advise if you saw the same issue before? Is there a faulty in the OLED I got.

Your help will be much appreciated.

Thank you.

Warm Regards,

Vito