HMD Lens Alignment via Encoded Color Patterns
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Solution Overview
Problem
Determining an accurate interpupillary distance for head-mounted display devices is often requiring professional assistance, leading to incorrect setups and reduced user experience when such assistance is absent.
Innovation Solution
A device and method utilizing a light source device with distinct light sources and lenses to project light patterns for accurate determination and adjustment of interpupillary distance, allowing users to align the lenses correctly without professional help.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If professional assistance is used for measuring interpupillary distance, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The system enables users to perform self-alignment by projecting encoded light patterns that automatically reveal misalignment through color shifts. Users can adjust lens positions based on visual feedback without requiring opticians or complex measurement tools, making the alignment process self-serviceable.
Solution Approach 2:
The patent uses color-encoded light patterns where specific colors indicate alignment status. When light passes through misaligned lenses, color filters reveal chromatic aberration and color shifts that guide users in adjusting lens positions to achieve proper interpupillary distance alignment.
2Ease of operation
If users set up display devices without professional assistance, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The system provides real-time visual feedback through color-coded light patterns that change based on lens alignment status. This feedback loop allows users to iteratively adjust lens positions and observe color changes, enabling them to achieve accurate alignment through intuitive visual guidance rather than complex measurements.
Solution Approach 2:
Color filters and encoded light patterns transform abstract alignment information into visible color changes. Users can intuitively perceive misalignment through color shifts and adjust lenses accordingly, converting a technically complex alignment problem into a simple visual task that maintains high precision while improving ease of operation.
3Measurement precision
If multiple light sources are used for alignment, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The light sources serve multiple functions: they provide illumination for the display, encode alignment information through color patterns, and enable the alignment measurement process itself. By making the light sources multi-functional, the system reduces overall device complexity while maintaining high measurement precision through the encoded color patterns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to accurately set up head-mounted display devices for correct interpupillary distance, improving user experience and visual quality by providing a self-adjustment mechanism for proper alignment.
Implementation Method 1
a first light source device configured to transmit a first light in a first direction and a second light in a second direction that is distinct from the first direction
Implementation Method 2
a first set of one or more lenses configured for directing the first light and the second light from the first light source device toward a first eye of a user
Data Source
AI summary
A head-mounted display device includes a first light element configured to transmit a first light having a first color; a second light element configured to transmit a second light having a second color; a first lens configured for directing the first light in a first direction and directing the second light in a second direction; and a first set of one or more lenses configured for directing the first light and the second light from the first lens toward a first eye of a user. Also disclosed is a method that includes transmitting a first light and a second light through a first lens and a first set of one or more lenses and directing the first light and the second light toward a first eye of a user. Further disclosed is a method for adjusting a position of one or more lenses.