How Snap's AR Tech Measures Distance for Virtual Button Presses
A method for mobile devices to calculate exactly when a user's finger or controller touches a virtual object in augmented reality by measuring precise distances from the camera.
Original patent title: “Distance determination for mixed reality interaction”
A method for mobile devices to calculate exactly when a user's finger or controller touches a virtual object in augmented reality by measuring precise distances from the camera. Granted to Snap Inc in 2024 with 22 claims and 2 forward citations.
Key facts
Coverage
What does this patent actually cover?
This patent describes a mathematical system for mobile devices to determine the depth and position of physical surfaces in the real world. It uses a specific formula involving two camera lenses to calculate the distance to a point on a surface. Once the device knows where that surface is, it renders a virtual button or control there. The system tracks the user's finger or controller and triggers an action when the user's movement crosses a specific distance threshold from that virtual object. It also includes a dynamic adjustment feature where the threshold for 'touching' the button gets tighter as the interaction continues, allowing for more precise control.
The gap
What does this patent NOT cover?
- Does not cover interaction methods that rely solely on 2D screen coordinates without depth calculation.
- Does not cover systems that do not use a dual-camera (stereo) setup for distance calculation.
- Does not cover non-visual methods of interaction like voice commands or haptic-only inputs.
- Does not cover general object recognition that does not involve triggering a virtual control.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
The system dynamically shrinks the activation threshold (the 'hitbox') based on the user's previous interactions, effectively 'locking' the user onto the virtual control once they have successfully engaged with it.
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Snapchat AR Lenses with interactive buttons
Mobile augmented reality shopping apps
Virtual control panels in AR environments
Why it matters
The bigger picture
As augmented reality moves from simple filters to interactive tools, the 'tap' is the most critical interface challenge. This patent addresses the 'ghost touch' problem where users struggle to know if they are actually interacting with a virtual object. It provides a technical framework for making virtual buttons feel responsive on mobile hardware.
Filed
December 29, 2021
Granted
June 11, 2024
Market context
Who's building on this
Companies in this space
Snap Inc. is the primary assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more → and continues to integrate this into their Lens Studio platform. Other major players in mobile AR, such as Meta and Apple, are actively researching similar depth-based interaction models for their respective AR glasses and mobile platforms.
Market impact
This patent helps standardize how AR interfaces handle depth, which is essential for moving beyond passive filters to functional AR applications. By defining a mathematical approach to 'touching' digital objects, it provides a foundation for developers to build more reliable and intuitive UI/UX in mobile AR.
Claim 1 — Plain English
What this patent covers
This patent describes a mathematical system for mobile devices to determine the depth and position of physical surfaces in the real world. It uses a specific formula involving two camera lenses to calculate the distance to a point on a surface. Once the device knows where that surface is, it renders a virtual button or control there. The system tracks the user's finger or controller and triggers an action when the user's movement crosses a specific distance threshold from that virtual object. It also includes a dynamic adjustment feature where the threshold for 'touching' the button gets tighter as the interaction continues, allowing for more precise control.
The clever bit
The system dynamically shrinks the activation threshold (the 'hitbox') based on the user's previous interactions, effectively 'locking' the user onto the virtual control once they have successfully engaged with it.
What it does not cover
- Does not cover interaction methods that rely solely on 2D screen coordinates without depth calculation.
- Does not cover systems that do not use a dual-camera (stereo) setup for distance calculation.
- Does not cover non-visual methods of interaction like voice commands or haptic-only inputs.
- Does not cover general object recognition that does not involve triggering a virtual control.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
PatentBrief Score
Impact Score
Moderate
Citation count
10/40
Early citations
Claim breadth
15/20
Broad claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →
Recency
20/20
Granted within 5 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$94K – $300K
Midpoint $187K · 15.5 yr remaining · industry ×1.6
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
The original legal language
Original claims
22 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Lucas, B. (2024). How Snap's AR Tech Measures Distance for Virtual Button Presses (U.S. Patent No. 12,008,152). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/12008152/vision-pro-persona
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Snap's AR Tech Measures Distance for Virtual Button Presses cover?
A method for mobile devices to calculate exactly when a user's finger or controller touches a virtual object in augmented reality by measuring precise distances from the camera.
Who owns patent US 12008152?
Snap Inc owns this patent, granted in 2024.
When does this patent expire?
This patent is expected to expire on June 11, 2044, when the invention enters the public domain.
What is patent US 12008152 cited by?
This patent has been cited by 2 later patents that build on its ideas.
What problem does this patent solve?
As augmented reality moves from simple filters to interactive tools, the 'tap' is the most critical interface challenge. This patent addresses the 'ghost touch' problem where users struggle to know if they are actually interacting with a virtual object. It provides a technical framework for making virtual buttons feel responsive on mobile hardware.
What does this patent NOT cover?
Does not cover interaction methods that rely solely on 2D screen coordinates without depth calculation.
Patent monitoring