3D Integrated Imaging Structure for Depth-of-Field Control

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Solution Overview

Problem

Current 3D naked-eye display technologies using microlens arrays produce average display effects due to insufficient control over the depth of field and parallax processing.

Innovation Solution

A 3D integrated imaging device comprising a spacer layer, a three-dimensional structure layer, and a microlens array, where the spacer layer controls the depth of field by adjusting the distance between the microlens array and the structure layer, and the microlens array cooperates with the structure layer to enhance stereoscopic perception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a microlens array is used for 3D naked-eye display, then binocular parallax perception is achieved, but the display effect of the reproduced image remains average due to insufficient depth of field control

Engineering Contradiction:

Improvedepth of field controlVSAvoiddisplay effect quality

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces a spacer layer as an intermediary component between the image array and microlens array. This spacer layer with controlled thickness (1-200 microns) acts as a mediator to precisely control the distance between layers, thereby achieving accurate depth of field control and improving the overall display effect quality

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies parameter changes by precisely controlling the thickness parameter of the spacer layer (within 1-200 microns) and the distance parameter between the image array and microlens array. By adjusting these parameters, the depth of field is optimized, transforming the average display effect into a high-quality stereoscopic display

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the distance between the microlens array and structure layer is fixed, then manufacturing is simplified, but flexible depth of field adjustment cannot be achieved

Engineering Contradiction:

Improvedepth of field adjustabilityVSAvoidstructure layer configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamics by making the distance between the image array and microlens array adjustable through the spacer layer. This dynamic configuration allows the depth of field to be adjusted flexibly, enabling the system to adapt to different viewing conditions and requirements while maintaining a relatively simple overall structure

Inventive Principle:

Principle #15Dynamics

3Reliability

If multiple layers are added to control depth of field, then display quality improves, but device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvestereoscopic display performanceVSAvoiddevice assembly process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the spacer layer function with the existing layer structure, combining the distance control function into a single integrated component rather than adding separate complex adjustment mechanisms. This merging approach maintains ease of manufacture while achieving improved stereoscopic display performance through better depth of field control

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

The device achieves flexible depth of field control and improved stereoscopic display performance, allowing for dynamic adjustment of the depth of field and enhancing the 3D display effect without the need for special viewing aids.

Implementation Method 1

n is a refractive index of the microlens

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

g is a sum of a thickness of the spacer layer and a height of the microlens

Methodology Applied

Scientific EffectLens focusing: Lens

Implementation Method 3

The spacer layer has a preset thickness... g is a sum of a thickness of the spacer layer and a height of the microlens

Methodology Applied

Scientific EffectPhysical spacing:

Implementation Method 4

each eye forms a distinct angle with the observed object, resulting in a slight difference between the images perceived by the left and right eyes, resulting in parallax

Methodology Applied

Scientific EffectParallax: Parallax

Data Source

PatentUS12504644B23D integrated imaging devices and preparation methods thereof

Publication Date: 2025.12.23 SVG TECH GRP CO LTD

AI summary

The present disclosure relates to a 3D integrated imaging device and a preparation method thereof. The 3D integrated imaging device includes a spacer layer, a three-dimensional structure layer, and a microlens array. The spacer layer has a preset thickness. The three-dimensional structure layer is disposed on a surface of a side of the spacer layer and includes a plurality of micro-nano structure units. The microlens array is arranged on a surface of a side of the spacer layer away from the three-dimensional structure layer and includes a plurality of microlenses. The plurality of micro-nano structure units correspond to the plurality of micro-lenses one by one. A front view pattern of the plurality of micro-nano structure units is a superposition of images formed by each layered image of a target stereoscopic image under the plurality of micro-lenses according to different depths of field after the target stereoscopic image is layered.