Wearable Display Subpixel Segmentation for Pixel Granularity
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Solution Overview
Problem
Wearable electronic devices with display apparatuses for augmented and virtual reality often suffer from perceived pixel granularity, which diminishes immersion and realistic sensations, and can be burdensome for users due to their weight.
Innovation Solution
A display apparatus with high pixel density, featuring a first and second subpixel with distinct light-emitting devices emitting blue and different colors, respectively, and a novel structure that includes a common layer and insulating layers to enhance aperture ratio and reduce pixel visibility, along with a wireless communication system for comfortable wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel size is reduced to increase pixel density, then display quality and immersion are improved, but manufacturing precision requirements increase and defects become more critical
Solution Approach 1:
The pixel structure is segmented into multiple subpixels (first subpixel with blue light-emitting device, second subpixel with different color light-emitting device) that can be manufactured separately and then combined. This segmentation allows for specialized manufacturing processes for each subpixel type, improving overall precision while reducing the impact of defects in individual subpixels on the entire display.
Solution Approach 2:
Different materials and structures are used in different regions of the display. The first light-emitting device uses materials optimized for blue light emission, while the second light-emitting device uses different materials optimized for other colors. This local quality approach allows each region to be manufactured with optimal precision for its specific function, improving overall display quality while managing manufacturing complexity.
2Weight of moving object
If HMD weight is reduced for user comfort, then wearability is improved, but display quality and processing power may be compromised
Solution Approach 1:
The display apparatus uses thin-film structures for the light-emitting devices and insulating layers, which significantly reduce the overall weight of the HMD while maintaining display quality. The thin-film transistor (TFT) structure and thin insulating layers enable high pixel density displays without adding substantial weight, thus improving wearability without compromising display quality.
Solution Approach 2:
The patent extracts and separates the weight-bearing components from the display functionality. By using lightweight materials for the display structure (thin films, insulating layers) and placing heavier components (battery, processing unit) in a separate wearable device that communicates wirelessly, the HMD itself can be made extremely lightweight while still providing high-quality display output.
3Manufacturing precision
If pixel size is reduced to enhance immersion, then pixel visibility is reduced, but manufacturing complexity increases
Solution Approach 1:
Multiple functional layers (insulating layers, light-emitting devices, electrodes) are merged into a single integrated pixel structure. The first and second subpixels share common structural elements and manufacturing processes, which reduces overall device complexity despite the high pixel density. This merging approach allows minute pixels to be manufactured with consistent quality while managing structural complexity through standardized design 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
The solution provides a high-immersion, lightweight display system with improved display quality by minimizing pixel visibility and weight, enhancing user experience through high-resolution, full-color displays and efficient communication.
Implementation Method 1
The first subpixel includes a first light-emitting device that emits blue light. The second subpixel includes a second light-emitting device that emits light of a color different from the blue color of the light emitted by the first light-emitting device.
Data Source
AI summary
A display apparatus with a high level of immersion or realistic sensation is provided. The display apparatus includes a display portion capable of full-color display, a communication portion having a wireless communication function, and a wearing portion that can be worn on a head. In an emission spectrum of blue display provided by the display portion at a first luminance, when the intensity of a first emission peak at a wavelength higher than or equal to 400 nm and lower than 500 nm is 1, the intensity of a second emission peak at a wavelength higher than or equal to 500 nm and lower than or equal to 700 nm in the emission spectrum is 0.5 or lower. The first luminance is any value higher than 0 cd/m2 and lower than 1 cd/m2.