VR Text Display Font Sizing by Pixel Per Degree and Distance
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Solution Overview
Problem
Current virtual reality (VR) systems face challenges in providing clear text display, with users experiencing eye fatigue and difficulty in viewing smaller texts due to limited VR hardware performance, leading to inconsistent font sizes across different VR devices and distances, which complicates development and content migration.
Innovation Solution
A text display method and apparatus that determine font sizes based on the pixel per degree of both the VR device and the user's eye, along with the distance between the text and the user, using a correction value to ensure clear and readable font sizes across various VR devices and distances, thereby improving user experience and reducing development costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If smaller font sizes are used to increase information density in VR displays, then more text can be displayed, but text clarity and readability deteriorate significantly
Solution Approach 1:
The patent dynamically adjusts font size parameters based on viewing distance and device-specific pixel per degree characteristics. The system calculates optimal font sizes using the formula that incorporates distance d, PPD VR device, and PPD Human eye to maintain readability while maximizing information display capacity.
2Manufacturing precision
If font sizes are optimized for one VR device, then text is clear on that device, but text becomes inconsistent when migrated to other VR devices with different specifications
Solution Approach 1:
The patent creates a universal font size calculation method that works across different VR devices by normalizing font sizing to the human eye's PPD (pixels per degree) rather than device-specific pixels. This allows the same text content to be migrated between devices while maintaining consistent readability through the standardized formula involving distance and PPD ratios.
3Manufacturing precision
If developers manually adjust font sizes for each VR device, then text clarity can be optimized, but development time and complexity increase significantly
Solution Approach 1:
The patent implements an automatic font size calculation system that eliminates manual adjustment by developers. The system self-determines optimal font sizes by retrieving device PPD specifications and viewing distance parameters, then computing the appropriate font size using the standardized formula, thereby automating what would otherwise require time-consuming manual optimization for each device.
4Device complexity
If fixed font sizes are used in VR displays, then rendering is simpler, but text readability varies significantly with viewing distance
Solution Approach 1:
The patent makes font size dynamic by linking it to the viewing distance parameter d. As the user's distance from the display changes, the system recalculates and adjusts the font size according to the formula that incorporates distance, ensuring text remains readable at various distances while maintaining relatively simple rendering through automated calculation.
Data Source
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AI summary
This application provides a text display method and apparatus in virtual reality, and a virtual reality device. The method includes: receiving text information; determining a font size of the text information based on a pixel per degree PPDVR device of a virtual reality VR device, a pixel per degree PPDHuman eye of an eye of a user, distance information between the text information in VR and the eye of the user, and a correction value α; rendering the text information based on the font size of the text information; and displaying the rendered text information. The text display method in virtual reality provided in this application can resolve a problem of unclear text display in a current virtual reality environment, and can be directly applied to various virtual reality platforms; and can also resolve a problem that in virtual environments, a developer cannot quickly obtain various comfortable and readable font heights in different VR devices and at different distances in the virtual environments, thereby improving user experience and reducing development costs.