Converging Lens Parallel Light for Imaging Artifacts

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Solution Overview

Problem

In existing integrated imaging display systems, light passing through an illumination microlens often irradiates adjacent projection microlenses, causing artifacts that reduce image contrast and resolution.

Innovation Solution

An integrated imaging display system is designed with a converging lens between the light source and illumination microlens array to convert light into parallel light, ensuring each illumination microlens unit irradiates only its corresponding projection microlens unit, avoiding cross-illumination and artifacts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If light from the light source directly illuminates the illumination microlens array without a converging lens, then the system structure is simpler, but light spreads to adjacent projection microlenses causing artifacts and reducing image contrast and resolution

Engineering Contradiction:

Improvesystem structureVSAvoidimage contrast and resolution

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

A converging lens is introduced as an intermediary component between the light source and the illumination microlens array. This mediator focuses the light into parallel beams, ensuring that each illumination microlens receives light only from its corresponding point light source and directs it to the correct projection microlens, preventing cross-illumination and artifacts while maintaining acceptable system complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the optical parameters of the light path by introducing the converging lens, which transforms the light from a divergent state to a parallel state. This parameter change (from divergent to parallel light) ensures precise one-to-one correspondence between illumination and projection microlenses, eliminating artifacts and improving image quality

Inventive Principle:

Principle #35Parameter changes

2Area of stationary object

If the diameter of the light source is increased to improve illumination coverage, then more projection microlenses are illuminated, but light from one illumination microlens irradiates multiple projection microlenses causing artifacts

Engineering Contradiction:

Improveillumination coverageVSAvoidartifacts

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The converging lens acts as a mediator that decouples the relationship between light source size and illumination coverage. It collects light from the extended light source and reformats it into parallel beams, ensuring that each beam corresponds to a specific illumination microlens and projection microlens pair, thus preventing artifacts while maintaining broad illumination coverage

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the illumination and projection processes into discrete one-to-one pairs through the converging lens system. Each point light source is optically coupled to a specific illumination microlens and its corresponding projection microlens, creating independent light paths that prevent cross-contamination and artifact formation

Inventive Principle:

Principle #1Segmentation

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 configuration enhances imaging quality by preventing artifacts and improving contrast, ensuring that each sub-image is accurately projected onto the corresponding projection microlens without overlap or distortion.

Implementation Method 1

each of the point light sources is located at a focal plane of the converging lens, the converging lens is configured to convert all light emitted by the point light sources into parallel light

Methodology Applied

Scientific EffectLight refraction through converging lens: Lens

Implementation Method 2

all light emitted by each of the illumination microlens units is irradiated on a corresponding projection microlens unit after passing through the sub-image

Methodology Applied

Scientific EffectLight focusing through microlens: Lens

Data Source

PatentUS11516447B2Integrated imaging display system

Publication Date: 2022.11.29 ARMY ACAD OF ARMORED FORCES OF PLA

AI summary

An integrated imaging display system is provided. The integrated imaging display system includes: a light source, a converging lens, an illumination microlens array, and a projection microlens array, where illumination microlens units in the illumination microlens array and projection microlens units in the projection microlens array are disposed in a one-to-one correspondence, and the converging lens converts all light emitted by the light source into parallel light and then irradiates the parallel light to the illumination microlens array; a sub-image is provided on a side of each of the illumination microlens units close to the projection microlens unit; all light emitted by each of the illumination microlens units is irradiated on a corresponding projection microlens unit after passing through the sub-image, and the projection microlens array displays an image of the sub-image.