Diffraction Grating Display for Multi-Angle Color Projection

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Solution Overview

Problem

Current display technologies are limited in their ability to simultaneously project full-color content to multiple viewers at different viewing angles, leading to a disconcerting experience as viewers move, as they can only display different images based on location and angle relative to the display device.

Innovation Solution

A computer-implemented method using multiple projectors and corresponding diffraction gratings to project specific colors at predefined intensities to content slots, ensuring full-color images are displayed consistently to viewers at various angles by determining which projector projects which color for each viewer based on their viewing angle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional display technologies are used to display images based on viewer location and angle, then different images can be shown to different viewers, but the color perception becomes inconsistent and disconcerting as viewers move

Engineering Contradiction:

Improveability to display different content to different viewersVSAvoidcolor perception consistency

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent divides the display into multiple content slots with different diffraction gratings, where each slot projects specific color components (red, green, blue) to specific viewing angles. This segmentation allows different viewers at different angles to receive appropriate color components while maintaining overall color consistency through coordinated projection from multiple projectors

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the diffraction grating parameters (line spacing, orientation) across different content slots to control the angular distribution of diffracted light. By adjusting these parameters, the system directs specific wavelengths to specific viewing angles, ensuring that viewers at any angle receive the correct color combination for consistent color perception

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If multiple projectors are used to project different colors to different viewing angles, then full-color content can be displayed to multiple viewers simultaneously, but the device complexity increases

Engineering Contradiction:

Improvesimultaneous full-color content projection to multiple viewersVSAvoidnumber of projectors and diffraction gratings

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Each projector in the system is designed to project multiple color components (red, green, blue) to different content slots, and each diffraction grating handles multiple wavelengths. This multi-functionality allows the system to display full-color content to multiple viewers simultaneously without requiring a separate projector for each color or viewer

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines multiple projectors and diffraction gratings into an integrated display system where the projections from multiple projectors are merged in space to form complete color images. The diffraction gratings in different content slots work together to direct the combined light from multiple projectors to the correct viewing angles, achieving full-color multi-viewer display through coordinated merging of optical paths

Inventive Principle:

Principle #5Merging (Combining)

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

Enables simultaneous projection of full-color content to multiple viewers at different angles, enhancing the viewing experience by maintaining consistent color perception as viewers move, and allowing for personalized dynamic displays in various environments.

Implementation Method 1

A diffraction grating is an optical component with a periodic structure that splits and diffracts light into several beams traveling in different directions. The directions of these beams depend on the spacing of the diffraction grating and the wavelength of the light

Methodology Applied

Scientific EffectDiffraction: Diffraction

Implementation Method 2

The directions of these beams depend on the spacing of the diffraction grating and the wavelength of the light so that the diffraction grating acts as a dispersive element

Methodology Applied

Scientific EffectDispersion: Dispersion (of waves)

Data Source

PatentUS11539924B2Multiple projector-enabled content targeting using diffraction grating

Publication Date: 2022.12.27 KYNDRYL INC

AI summary

Multiple projector-enabled content targeting using diffraction grating is provided. A projector of a plurality of projectors in a display device is selected to project a particular color of a plurality of different colors at a predefined intensity to a content slot in a set of content slots via a corresponding diffraction grating to provide different content in full color images to respective viewers of a set of viewers at different viewing angles relative to the display device simultaneously. The different content is projected in the full color images to the respective viewers at the different viewing angles simultaneously using each particular projector of the plurality of projectors to project its particular color of the plurality of different colors at the predefined intensity to each particular content slot of the set of content slots via each corresponding diffraction grating.