GM has filed a patent for an embedded vehicle window lighting system that can emit light in such a manner as to reduce an occurrence of total internal reflection of the light.
The new GM patent application has been assigned patent number US 2023/0280522 A1 with the United States Patent and Trademark Office (USPTO), and was published on September 7th, 2023. The patent was originally filed on March 1st, 2022. The patent lists two Michigan-based engineers as the inventors, including Jonglee Park and Michael K. Larsen.
The patent describes an embedded vehicle window lighting system capable of emitting light from any window on a vehicle, including a windshield, side window, or rear window. The patent describes a system that includes an embedded light source within a window or pane of the vehicle, with the light source transmitting a light beam from within the pane, passing through a glass layer into the outside environment. There are multiple interfaces, and a light ray that is incident at a certain angle will “experience total internal reflection” such that the internally reflected light is lost to an observer in the outside environment, therefore reducing brightness for said observer.
This system appears to be useful for a number of different applications, such as displaying messages on vehicle glass without disrupting the view for passengers inside the vehicle. This sort of system may be useful for things like advertisements or announcements, such as on autonomous vehicles. The system could also be useful for integrating turn signals or other exterior indicators.
In other GM patent news, The General has also filed to patent systems for a telescoping steering wheel rim that can better position the air bag for safer vehicle use, as well as a system that can identify a lost item in a vehicle and even notify the potential owner once the item is identified. GM has also patented a system that allows vehicles to move under their own power during assembly.