Nintendo's Switch 2 Joy-Con controllers will include optical sensors that let them function like computer mice when placed on flat surfaces. A patent published today by the World Intellectual Property Organization details how the controllers use reflected light to track movement, similar to traditional optical mouse technology.

The patent, filed in January 2023, describes a "sensor for mouse operation" built into the Joy-Con's rail side - the part that normally attaches to the console. When placed horizontally on a desk or table, players can grip the controller's outer edge while sliding it around to control cursor movement. The shoulder buttons act as left and right mouse clicks in this configuration.

"The sensor for mouse operation detects reflected light from a detected surface, the light changing by moving over the detected surface in a state in which either the first side surface or the second side surface is placed on the detected surface."— From Nintendo's patent filing

Nintendo has designed the ergonomics to keep the controller's analog stick accessible even in mouse mode - it points horizontally when the Joy-Con is laid on its side. The patent notes this setup is "easy to hold" and allows natural finger positioning for clicking the shoulder buttons.

The mouse functionality could prove especially useful for PC-style games coming to Switch 2, like strategy titles and first-person shooters. Players will be able to use traditional controller inputs or switch to more precise mouse aiming when needed. The patent even shows both Joy-Cons being used as mice simultaneously, hinting at potential dual-cursor gameplay mechanics.

While patents don't always reflect final products, Nintendo already teased this feature in the Switch 2's reveal trailer last month, briefly showing the Joy-Cons sliding across a surface. The company is expected to share more details about the Switch 2 and its innovative controllers during its next Direct presentation on April 2nd.