VR Housing Coating Layers for Infrared Transmission
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Solution Overview
Problem
Conventional VR systems experience tracking errors due to external visible light affecting image sensors and incorrect grayscale matching, leading to low identification accuracy of feature points.
Innovation Solution
An electronic apparatus with a housing featuring a light transmission portion and a covering structure with sequentially stacked coating layers of varying thicknesses, refractive indices, reflectivities, and transmissivities, which transmits most infrared light and reflects visible light, minimizing external light interference and enhancing image matching accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is made transparent to allow infrared light transmission, then infrared sensing is enabled, but visible light interferes with the image sensor causing tracking errors
Solution Approach 1:
The patent applies local quality by making different portions of the housing have different optical properties. The covering structure includes multiple coating layers with different transmissivities for different wavelengths, allowing the housing to be selectively transparent to infrared light while opaque to visible light. This resolves the contradiction by enabling infrared sensing while blocking visible light interference at the specific location of the light transmission portion.
Solution Approach 2:
The patent uses composite materials in the form of multiple coating layers with different optical characteristics. The covering structure comprises first, second, and third coating layers, each with different transmissivity values for infrared and visible light. This composite structure allows selective wavelength transmission, achieving both infrared transparency and visible light blocking simultaneously, thus resolving the tracking accuracy contradiction.
2Measurement precision
If external visible light is blocked to prevent sensor interference, then tracking accuracy improves, but the housing becomes less transparent affecting overall light transmission
Solution Approach 1:
The patent applies parameter changes by modifying the optical transmission characteristics of the housing through multiple coating layers. Each layer has specific transmissivity parameters for different wavelengths, allowing the system to optimize infrared transmission while blocking visible light. This resolves the contradiction by changing the transmission parameters selectively for different spectral ranges rather than uniformly blocking all light.
3Adaptability or versatility
If multiple coating layers are added to filter light wavelengths, then light transmission control improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the light filtering function into multiple discrete coating layers, each with specific optical properties. The covering structure is segmented into first, second, and third coating layers, where each layer contributes to the overall wavelength selection. This segmentation allows precise control of light transmission while keeping each individual layer relatively simple in structure.
Solution Approach 2:
The patent achieves multi-functionality by designing the covering structure to simultaneously perform multiple functions: blocking visible light, transmitting infrared light, and providing a reflective surface. The combination of multiple coating layers creates a universal structure that handles different wavelength ranges and optical functions in a single integrated component, reducing overall device complexity despite the multiple layers.
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
The solution effectively reduces tracking errors by shielding infrared image sensors from visible light and ensuring accurate image matching, improving tracking precision in VR systems.
Implementation Method 1
The coating layers respectively have different thicknesses, different refractive indices, different reflectivities, and different transmissivities
Implementation Method 2
Reflected light of the covering structure presents a virtual image with a pattern
Implementation Method 3
the covering structure is configured to transmit most of light in a wavelength range of infrared spectrum and not to transmit most of light in a wavelength range of visible spectrum
Data Source
AI summary
An electronic apparatus includes a housing and a covering structure. The housing has a light transmission portion. The covering structure includes a plurality of coating layers sequentially stacked above the light transmission portion. The coating layers respectively have different thicknesses, different refractive indices, different reflectivities, and different transmissivities. Reflected light of the coating layers presents a virtual image with a pattern.