Camera-Tracked Input Unit Layout to Prevent LED Overlap
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In input devices with multiple light-emitting units, adjacent units can overlap when viewed through a camera, affecting tracking accuracy.
Innovation Solution
The input device features a tracked unit with light-emitting units arranged on side-by-side outer surfaces and a light shield portion located outside these units to prevent overlap, enhancing tracking accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple light-emitting units are provided in the input device, then the tracking information can be enhanced, but adjacent light-emitting units may overlap when viewed through a camera, reducing tracking accuracy
Solution Approach 1:
A light shield portion is introduced as an intermediary element between adjacent light-emitting units. This light shield prevents light from one unit from being detected by a camera as if it originated from another unit, thereby eliminating false overlap detection while maintaining multiple light-emitting units for enhanced tracking information
Solution Approach 2:
The light shield portion extends in a direction from the outer surface of the tracked unit toward the light-emitting units, creating a three-dimensional spatial separation. This dimensional approach ensures that light paths from different units are physically separated, preventing overlap in camera images regardless of viewing angle
Data Source
AI summary
Two light-emitting units are to be prevented from overlapping each other in an image obtained through a camera. A tracked unit (30) has a first outer surface (A1) provided with a first light-emitting unit (H1), a second outer surface (A2) provided with a second light-emitting unit (H2), and a light shield portion (B). The second outer surface (A2) faces a second direction different from that of the first outer surface (A1). The light shield portion (B) is located further outside than the first light-emitting unit (H1) and the second light-emitting unit (H2).