Dynamic Dimming Layer for AR Display Ambient Light Compensation
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Solution Overview
Problem
Augmented reality (AR) display systems face challenges in maintaining contrast and color accuracy due to ambient light interference from the physical environment, which degrades the AR experience by limiting contrast and introducing unwanted color tints.
Innovation Solution
An electronic device with a translucent display senses light superposition characteristic values and adjusts display operating parameters, such as tinting and color composition, to match predetermined display characteristics of computer-generated reality (CGR) objects, ensuring they appear as intended within a performance threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a physical fixed dimming layer is integrated with the translucent display to block ambient light, then contrast between physical environment and displayed content is improved, but the display shows a constantly darker version of the physical environment and cannot be used in low light situations
Solution Approach 1:
The patent applies a dynamic dimming layer that can change its optical properties in real-time based on ambient light conditions. The layer transitions between transparent and opaque states, allowing the display to adapt to varying lighting environments. This resolves the contradiction by providing contrast enhancement when needed while maintaining adaptability to different lighting conditions, unlike fixed dimming layers that permanently darken the display.
Solution Approach 2:
The patent changes the optical parameters of the dimming layer dynamically. By adjusting the layer's transparency and opacity parameters in response to ambient light detection, the system optimizes contrast for computer-generated content while maintaining the ability to function in low light environments. This parameter adjustment mechanism resolves the contradiction between contrast enhancement and environmental adaptability.
2Illumination intensity
If additive display methods are used to composite computer-generated content with physical environment, then the display can show bright content, but color composition of the physical environment interferes with displayed content by providing dominant hues that are difficult to mask
Solution Approach 1:
The patent introduces a color correction layer as an intermediary between the physical environment light and the computer-generated content. This layer acts as a mediator that filters and adjusts the color composition of ambient light before it reaches the display, reducing dominant environmental hues that would otherwise interfere with the displayed content's color accuracy.
Solution Approach 2:
The patent dynamically adjusts the color characteristics of the display output based on detected ambient light color composition. By changing the color rendering parameters in response to environmental conditions, the system compensates for color interference and maintains accurate color representation of both physical and computer-generated content.
Data Source
AI summary
A method includes sensing a plurality of light superposition characteristic values associated with ambient light from a physical environment. The ambient light emanates from the physical environment towards one side of a translucent display. The plurality of light superposition characteristic values quantifies interactions with the ambient light. The method includes determining a plurality of display correction values associated with the electronic device based on a function of the plurality of light superposition characteristic values and predetermined display characteristics of a computer-generated reality (CGR) object. The method includes changing one or more display operating parameters associated with the electronic device in accordance with the plurality of display correction values in order to satisfy the predetermined display characteristics of the CGR object within a performance threshold.