Background striped on TFT ILI9225

[proksa1]

Hi Friends!

I faced an issue on 2" TFT LCD screen, the background is striped a bit. I use STM32F103C8T6 mcu & TFT_22_ILI9225 library, LCD has ILI9225 controller. Does anyone have an idea what is the reason of this mistake?

Thanks in Advance!
Zoltan