VR Headset Blue Light Suppression via Dynamic Pixel Adjustment
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Solution Overview
Problem
Long-term use of virtual reality headsets leads to visual fatigue due to blue light emission, with existing methods either inadequately suppressing blue light or resulting in a poor user experience with yellowish images.
Innovation Solution
A method and apparatus that calculate the cumulative blue component of pixels on a virtual reality headset screen, using weight areas divided based on blue light impact on human eyes, to determine a dynamic blue light suppression factor and adjust the blue component value of each pixel in real-time, ensuring balanced eye protection and display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blue light component is suppressed by decreasing B value in RGB of pixels according to a fixed ratio, then blue light intensity is reduced and eye protection is improved, but images become continuously yellowish leading to poor user experience
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed blue light suppression ratio to a dynamic adjustment mechanism. The system calculates cumulative blue light exposure over time and adjusts the suppression factor accordingly, allowing the blue component reduction to vary based on actual exposure levels rather than applying a constant reduction that degrades image quality continuously
Solution Approach 2:
The patent changes the parameter of blue light suppression from a fixed ratio to a time-dependent variable. By introducing cumulative exposure time as a parameter, the system modifies the suppression factor dynamically, reducing blue light only when necessary based on exposure duration while maintaining normal color reproduction during short usage periods
2Adaptability or versatility
If screens are placed close to eyes for immersive virtual reality experience, then closure and immersion are improved, but blue light irritation to eyes increases leading to visual fatigue
Solution Approach 1:
The patent implements feedback by continuously monitoring cumulative blue light exposure and using this information to adjust suppression levels in real-time. The system creates a closed-loop control where exposure data feeds back into the suppression algorithm, enabling adaptive protection that responds to actual usage patterns rather than applying uniform suppression
Solution Approach 2:
The patent applies preliminary action by calculating and accumulating blue light exposure in advance before applying suppression. The system tracks exposure from time t0 to t1, building up a cumulative total that informs subsequent suppression decisions, allowing proactive adjustment before significant visual fatigue occurs
Data Source
AI summary
The present invention discloses a method and an apparatus for eye protection based on a screen of a virtual reality headset, the method comprising: calculating, based on a plurality of weight areas divided on a screen of a virtual reality headset, a total cumulative amount of a blue component of pixels on the screen from a t0 moment to a t1 moment, wherein the plurality of weight areas is divided according to weights of impact of blue light on human eyes; determining, according to the total cumulative amount of the blue component from the t0 moment to the t1 moment, a blue light suppression factor at the t1 moment, and then obtaining a suppressed blue component value of each pixel of an image at a next frame; outputting the image of the next frame with the suppressed blue component value. In such a way, the present invention can strike a balance between eye protection and guarantee of display performance.