This is the company’s first phone with a dynamic OLED panel — technology that Samsung’s marketing department is referring to as “Infinity O AMOLED.” We’re looking at an HDR10+ screen that uses “dynamic tone mapping” to improve the contrast, keep details visible even in dark spots and optimize colors when you’re say, watching a movie. Unrelated to that, the screen also reduces blue light by 42 percent in an effort to minimize eye strain. That’s not a special night mode, mind you, but the default experience.
Source: The Galaxy S10 features Samsung’s first dynamic AMOLED screen