# How Game Controllers Change Button Functions Using Plug-in Accessories

> A system for game controllers that automatically changes what a button does when you physically attach a hardware accessory to the controller.

- **Patent:** US 10543427
- **Original title:** Game controller function remapping via external accessory
- **Owner:** Microsoft Technology Licensing LLC
- **Granted:** 2020
- **Status:** Active
- **Times cited:** 2
- **Field:** consumer_electronics, gaming, mechanical

## What it does

This patent describes a game controller that detects when an external piece of hardware is plugged into it. When the accessory is attached, the controller's internal software, called a control mapping machine, automatically changes the function of existing buttons. For example, a standard 'A' button might perform a jump action normally, but when a specific accessory is attached, that same 'A' button could trigger a different action, like reloading a weapon or opening a menu. The system relies on the controller recognizing the accessory and sending updated signals to the connected console or PC.

## What it does NOT cover

- Does not cover software-based button remapping that occurs purely through console settings menus.
- Does not cover wireless accessory connections that do not involve a physical interface on the controller.
- Does not cover mapping changes that occur without the presence of an additional hardware control on the accessory.

## The clever bit

The innovation lies in making the controller 'aware' of its own physical state—specifically, that the mapping logic is tied to the physical presence of an accessory rather than a user-selected software profile.

## Real-world examples

1. Xbox Elite Controller back-paddle attachments
2. Modular gaming controller grips
3. Customizable eSports controller add-ons

## Why it matters

This technology allows for modular hardware design, enabling gamers to expand their controller's capabilities without buying an entirely new device. It is particularly relevant for professional gaming and accessibility, where users need custom layouts that can be swapped quickly. By automating the mapping change upon physical connection, it removes the need for manual configuration.

## Frequently asked questions

### What does How Game Controllers Change Button Functions Using Plug-in Accessories cover?

A system for game controllers that automatically changes what a button does when you physically attach a hardware accessory to the controller.

### Who owns patent US 10543427?

Microsoft Technology Licensing LLC owns this patent, granted in 2020.

### When does this patent expire?

This patent is expected to expire on January 28, 2040, when the invention enters the public domain.

### What is patent US 10543427 cited by?

This patent has been cited by 2 later patents that build on its ideas.

### What problem does this patent solve?

This technology allows for modular hardware design, enabling gamers to expand their controller's capabilities without buying an entirely new device. It is particularly relevant for professional gaming and accessibility, where users need custom layouts that can be swapped quickly. By automating the mapping change upon physical connection, it removes the need for manual configuration.

### What does this patent NOT cover?

Does not cover software-based button remapping that occurs purely through console settings menus.

**Full plain-English explainer:** https://patentbrief.org/patent/us/10543427/joy-con-motion-controls

**Original patent:** https://patents.google.com/patent/US10543427

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._