{
  "patent_number": "US RE45905",
  "country": "US",
  "title": "How Nintendo's Wii Remote Tracks Motion and Infrared Light",
  "original_title": "USRE45905E1 - Video game system with wireless modular handheld controller",
  "summary": "A patent describing the Wii Remote's technology for tracking physical movement and infrared light to control video games wirelessly.",
  "what_it_does": "This patent details a handheld controller that uses a combination of sensors to track its position in 3D space. It features an infrared camera that detects light emitted from a sensor bar near the TV, allowing the system to calculate the controller's X and Y coordinates on the screen. Simultaneously, an internal three-axis accelerometer measures physical movement and tilt. The controller then wirelessly sends this combined data to the game console, while also providing feedback through a built-in speaker or vibration motor.",
  "what_it_does_not_cover": [
    "Does not cover controllers that rely solely on inertial sensors without an infrared-based optical tracking component.",
    "Does not cover wired controllers that require a physical tether to the main console unit.",
    "Does not cover systems that track motion using external cameras pointed at the user (like the original Kinect).",
    "Does not cover touch-based input methods or gesture recognition that does not involve the specific infrared-to-camera tracking method described."
  ],
  "filed": "2013-11-27",
  "granted": "2016-03-01",
  "expires": null,
  "status": "active",
  "holder": "Nintendo Co Ltd",
  "holder_url": "https://patentbrief.org/company/nintendo-co-ltd",
  "inventors": [
    {
      "name": "Kuniaki Ito",
      "url": "https://patentbrief.org/inventor/kuniaki-ito"
    },
    {
      "name": "Ryoji Kuroda",
      "url": "https://patentbrief.org/inventor/ryoji-kuroda"
    },
    {
      "name": "Masahiro Urata",
      "url": "https://patentbrief.org/inventor/masahiro-urata"
    },
    {
      "name": "Akio Ikeda",
      "url": "https://patentbrief.org/inventor/akio-ikeda"
    },
    {
      "name": "Genyo Takeda",
      "url": "https://patentbrief.org/inventor/genyo-takeda"
    }
  ],
  "times_cited": 11,
  "tags": [
    "consumer_electronics",
    "gaming",
    "mechanical"
  ],
  "abstract": "A home entertainment system for video games and other applications includes a main unit and handheld controllers. The handheld controllers sense their own motion by detecting illumination emitted by emitters positioned at either side of a display. The controllers can be plugged into expansion units that customize the overall control interface for particular applications including but not limited to legacy video games.",
  "url": "https://patentbrief.org/patent/us/RE45905/walkman-portable-cassette-player",
  "markdown_url": "https://patentbrief.org/patent/us/RE45905/walkman-portable-cassette-player/md",
  "google_patents_url": "https://patents.google.com/patent/USRE45905",
  "relatedPatents": []
}