Something I've noticed is that if I look at the screen from below center viewing, it looks dimmer. I notice about a 10-15% increase in brightness if I look at the screen from about 10-15 degrees above center. Seems the Samsung screen is pixel shifted as it would most likely be below eye level. My experience is aiming directly at me actually causes a slightly dimmer visual that if I tilt the top edge towards me about 1/4 - 1/2 inch. This actually yeilds a brighter screen and if I wear a dark shirt, a very visible screen even in direct sunlight.
Also, make sure you re-select Day Mode and increase to full brightness. A common problem is to land in night mode and come back out a day or so later only to increase the brightness. This does not remove the digital darkening layer we add for night mode. Big difference we notice after adding Day/Night Mode.