Wavelength-Selective Screens for Immersive Display Cross-Talk

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Solution Overview

Problem

Immersive display systems face challenges in maintaining high contrast ratio and dynamic range due to cross-talk or cross-reflection between multiple projection surfaces, which reduces image quality, especially in large venues with varied viewing angles.

Innovation Solution

The implementation of a multilayer structure in projection screens that selectively absorbs cross-reflected light by configuring each screen to diffusely reflect light in non-overlapping wavelength bands, thereby suppressing cross-talk and enhancing contrast and dynamic range.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple projection surfaces are used to provide immersive viewing, then the viewing experience and realism are improved, but cross-talk or cross-reflection between surfaces reduces contrast ratio and dynamic range

Engineering Contradiction:

Improveimmersive viewing capabilityVSAvoidcross-talk or cross-reflection

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Each projection surface is assigned a unique wavelength band (first, second, and third wavelength bands) that does not overlap with others. The screens are configured to reflect light in their assigned bands while absorbing light in other bands, creating locally optimized optical properties that prevent cross-talk between surfaces.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs wavelength-selective screens that change their optical response based on the wavelength of incident light. Each screen reflects its assigned wavelength band while absorbing other bands, effectively using color/wavelength selection to eliminate cross-talk and maintain high contrast ratios across multiple projection surfaces.

Inventive Principle:

Principle #32Color changes

2Adaptability or versatility

If multiple projection surfaces are used to create immersive experience, then the viewing angles and realism are enhanced, but light mixing on surfaces diminishes image quality

Engineering Contradiction:

Improveviewing angle rangeVSAvoidimage quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Each projection surface is configured with specific optical properties tailored to its assigned wavelength band. The screens exhibit high reflectivity for their assigned band and high absorption for other bands, creating locally optimized performance that maintains image quality across wide viewing angles without light mixing.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The wavelength-selective screens dynamically respond to the wavelength of incident light by reflecting the assigned band and absorbing others. This color-selective behavior prevents light mixing between surfaces, maintaining sharp image quality and high contrast ratios even when viewed from multiple angles simultaneously.

Inventive Principle:

Principle #32Color changes

3Device complexity

If conventional projection screens are used in immersive display systems, then the system simplicity is maintained, but cross-reflection reduces contrast ratio and dynamic range

Engineering Contradiction:

Improvesystem structureVSAvoidcross-reflection

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces wavelength-selective screens that change their optical response based on wavelength. Each screen is designed to reflect its assigned wavelength band while absorbing other bands, effectively using optical property differentiation to eliminate cross-reflection and maintain high contrast ratios without complicating the overall system structure.

Inventive Principle:

Principle #32Color changes

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 approach significantly reduces cross-talk, allowing for high-contrast, high-dynamic range immersive viewing experiences by ensuring that cross-reflected light is absorbed rather than mixed with the intended image, thereby maintaining image quality across a wide range of viewing angles.

Implementation Method 1

wavelength-selective absorption of the cross-reflected light

Methodology Applied

Scientific EffectWavelength-selective absorption: Absorption (EM radiation)

Implementation Method 2

diffusely reflect light in a first red wavelength band, a first green wavelength band, and a first blue wavelength band

Methodology Applied

Scientific EffectDiffuse reflection: Reflection

Data Source

PatentUS9766535B2Display systems and methods employing wavelength multiplexing of colors

Publication Date: 2017.09.19 BARCO INC

AI summary

An immersive display system is disclosed that includes screens configured to mitigate reduction in contrast ratio due at least in part to peripheral light incident on the screens. The immersive display system includes at least two screens and at least two projector systems. The screens have a multi-layered structure configured to selectively reflect light in narrow wavelength bands. Each screen is configured to strongly diffusely reflect light in narrow wavelength bands that are different from the wavelength bands reflected by other screens in the immersive display system. Projector systems can be configured to provide light to associated screens in the narrow wavelength bands reflected by those screens.