Fiber Bundle Plate Display for Variable Depth of Field

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Solution Overview

Problem

Existing wearable optical systems struggle to display images at varying distances without obstructing the user's field of view or causing distortions, and they lack effective methods for capturing images with depth information.

Innovation Solution

A wearable optical display system using a fiber bundle plate with varying fiber lengths arranged in a spatially sequential pattern, combined with eye tracking sensors, to dynamically adjust the focus of displayed images and capture images with depth information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional optical display system is used to display images at varying distances, then the user can view images, but the field of view is obstructed or distortions occur

Engineering Contradiction:

Improvedisplay distance variabilityVSAvoidfield of view obstruction and distortion

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The optical display system segments the fiber bundle into multiple groups, where each group contains fibers of a specific length corresponding to a specific display distance. This segmentation allows the system to display images at varying distances without using a single complex optical path that would cause obstruction or distortion.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the fiber bundle plate have different fiber lengths, creating local quality variations. Each local region is optimized for a specific display distance, allowing the system to present images at multiple distances simultaneously without compromising image quality or causing distortion in any particular region.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If a fiber bundle plate with varying fiber lengths is used, then images can be displayed at different distances, but the device complexity increases

Engineering Contradiction:

Improvedisplay distance controlVSAvoidfiber bundle structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system changes the physical parameter of fiber length to control display distance. By varying this single parameter across different fiber groups, the system achieves multiple display distances without adding complex mechanical adjustment mechanisms or multiple separate optical systems.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Instead of adjusting display distance through mechanical movement in one dimension, the system uses the spatial arrangement dimension of the fiber bundle plate. Fibers are organized in a two-dimensional plate structure where position correlates with fiber length, adding a spatial dimension to distance control.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Loss of information

If traditional image capturing methods are used, then images can be captured, but depth information is lost

Engineering Contradiction:

Improvedepth informationVSAvoiddepth measurement accuracy

Core Design Contradiction:

Loss of informationVSMeasurement precision

Solution Approach 1:

The system uses eye tracking sensors to provide feedback about the user's gaze and focus. This feedback is combined with the known fiber length-to-distance mapping to determine which depth plane the user is viewing, thereby recovering depth information from the captured image data.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The fiber bundle plate acts as an intermediary that encodes depth information into the spatial arrangement of illuminated fibers. By capturing which specific fibers are illuminated and their known positions, the system can reconstruct depth information that would otherwise be lost in traditional 2D image capture.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 clear, distortion-free display of images at different distances and accurate capture of depth information, enhancing the user's experience and functionality of wearable optical systems.

Implementation Method 1

a fiber bundle, which may be in the form of a plate. The bundle may be formed of a plurality of parallel optical fibers extending from the source

Methodology Applied

Scientific EffectOptical fiber transmission: Optical Fibre

Data Source

PatentUS12598285B2Optical display, image capturing device and methods with variable depth of field

Publication Date: 2026.04.07 EVERYSIGHT LTD

AI summary

An optical display, suitable for use in a wearable device such as a headset, comprises a pixelated illumination array and a fiber bundle, optionally in the form of a plate. The plate is formed of a plurality of parallel optical fibers extending in the direction of the thickness of the plate, the fibers are of at least two different lengths and are arranged in a spatially sequential pattern over at least a part of the plate, and the array is arranged to provide illumination out of the fibers. Different length fibers may be illuminated to present images at different distances from the user's eyes. The fiber bundle plate may also form part of an image capturing device and be used in the creation of a depth map for a captured image.