Optical Package Bonding Structure for Flare Suppression

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Solution Overview

Problem

Conventional optical package structures experience light reflection and flare issues due to refractive index changes, affecting image sensing accuracy and causing unwanted light spots during light emission, particularly in image sensors and display elements.

Innovation Solution

An optical package structure featuring a multi-layered bonding structural member with a light-absorption layer positioned between opaque first and second bonding layers, which absorbs external light and reduces reflections to the optical function region, thereby minimizing flare formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a conventional bonding layer is used to connect the optical element, then the structure is simple and easy to manufacture, but light reflection occurs due to refractive index changes causing flare

Engineering Contradiction:

Improvebonding layer structureVSAvoidlight reflection and flare

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The bonding layer is segmented into multiple functional layers: a first bonding layer for structural connection, a light-absorption layer for absorbing stray light, and a second bonding layer for additional bonding. This segmentation allows each layer to perform its specific function independently, solving the flare problem while maintaining manufacturing simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The light-absorption layer acts as an intermediary between the optical element and the external environment. It mediates the interaction by absorbing stray light that would otherwise reflect off the bonding layers and enter the optical function region, thereby eliminating flare without complicating the overall bonding structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the light transmittable layer allows external light to enter the image-sensing region, then image sensing function is enabled, but light reflection at certain angles causes flare

Engineering Contradiction:

Improvelight transmission functionVSAvoidimage sensing accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

Different regions of the optical package are assigned different optical properties. The light transmittable layer maintains high transmittance in the optical function region to enable image sensing, while the bonding structural member with light-absorption layer provides light absorption in non-optical regions to prevent flare. This local differentiation resolves the contradiction between light transmission and measurement precision.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If a multi-layer bonding structural member with light-absorption layer is added to reduce flare, then image sensing accuracy is improved, but device complexity increases

Engineering Contradiction:

Improveimage sensing accuracyVSAvoidbonding structural member structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The bonding function and light absorption function are merged into a single integrated bonding structural member. The first bonding layer, light-absorption layer, and second bonding layer are combined in sequence to form one component that simultaneously provides structural bonding and flare prevention, avoiding the need for separate bonding layers and light absorption layers as distinct components.

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 light-absorption layer effectively reduces light reflections and refractions, enhancing image sensing accuracy and eliminating unwanted light spots by absorbing external light and minimizing flare occurrences.

Implementation Method 1

The light-absorption layer is configured to absorb light emitted to the bonding structural member

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

when the light passes through the light transmittable layer at certain angles, a light reflection phenomenon may occur due to changes of a refractive index

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS20240204020A1Optical package structure and method for manufacturing the same

Publication Date: 2024.06.20 TONG HSING ELECTRONICS IND LTD

AI summary

An optical package structure and a method for manufacturing the same are provided. The optical package structure includes an optical element, a bonding structural member, and a light transmittable member. The bonding structural member is bonded to a surface of the optical element. The bonding structural member includes a first bonding layer, a light-absorption layer, and a second bonding layer. The first bonding layer and the second bonding layer are made of an opaque material. The light-absorption layer is disposed between the first bonding layer and the second bonding layer. The light transmittable member is bonded to the bonding structural member and spaced apart from the optical element. The light-absorption layer is configured to absorb light emitted to the bonding structural member.