Holographic Imaging System with Dynamic Light Attenuation
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Solution Overview
Problem
Current head-mounted display (HMD) systems struggle to effectively overlay holographic virtual objects onto external scenes while maintaining visibility of the real-world environment, particularly due to luminance differences between the virtual and external scenes, leading to issues with the visibility and clarity of the holographic images.
Innovation Solution
The system employs a holographic image generator, a light attenuator, and a camera to determine an attenuation pattern based on the external scene and virtual object, and a compensation pattern to adjust the luminance and visibility of the holographic image, ensuring it is clearly visible against varying background luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light attenuator is used to overlay holographic virtual objects onto external scenes, then the visibility of virtual objects is improved, but the luminance difference between virtual and external scenes causes visibility and clarity issues
Solution Approach 1:
The system dynamically adjusts the attenuation pattern based on real-time capture of the external scene's luminance characteristics. The controller modifies the light attenuator's transmission characteristics in response to varying background conditions, enabling the holographic display to adapt to different lighting environments and maintain optimal visibility contrast.
Solution Approach 2:
The system changes the transmission parameter of the light attenuator dynamically. By capturing the external scene and analyzing its luminance distribution, the controller adjusts the attenuation factor and spatial pattern of the light attenuator to optimize the contrast between the holographic image and the background, resolving the visibility issue under varying luminance conditions.
2Illumination intensity
If the light attenuator is adjusted to enhance holographic image visibility, then the contrast is improved, but the complexity of the system increases
Solution Approach 1:
The existing light attenuator component is made multi-functional by enabling it to perform both fixed attenuation and dynamic, scene-adaptive attenuation. The same physical component serves multiple purposes: maintaining base contrast and dynamically responding to external scene conditions, thereby improving contrast without adding separate dedicated systems.
Solution Approach 2:
The system implements a feedback loop where the camera continuously captures the external scene, the controller analyzes the luminance characteristics, and adjusts the light attenuator accordingly. This closed-loop feedback mechanism enables automatic adaptation to varying conditions, improving contrast while keeping the control system manageable through intelligent automation rather than complex hardware.
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
This solution enhances the visibility and clarity of holographic images by dynamically adjusting the light attenuation and compensation patterns, allowing for seamless integration of virtual objects into the real-world environment, regardless of luminance differences, thereby improving the overall user experience in augmented, mixed, and virtual reality applications.
Implementation Method 1
a light attenuator; at least one controller configured to: determine, based on the virtual object, an attenuation pattern, for rendering a filter area at the light attenuator
Implementation Method 2
a holographic image generator for generating a holographic image including a virtual object to be displayed in an external scene
Data Source
AI summary
A method of controlling an imaging system for a Head Mounted Display (HMD) device. The method comprises capturing an external scene, for example using a camera, determining an attenuation pattern, for rendering a filter area. The method also comprises determining, based on the captured external scene, a compensation pattern to for compensating at least part of the filter area, attenuating the external scene using the attenuation pattern and generating a holographic image of a virtual object, the holographic image including the compensation pattern.