Light Guide Plate Structure for Low-Leakage Full Lamination

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Solution Overview

Problem

Current light guide plates suffer from light leakage and insufficient structural strength due to air layers causing interface reflections and reduced image contrast, especially when fully laminated with functional modules.

Innovation Solution

A light guide plate with optical microstructures, a reflection layer, and an absorption layer are designed to minimize light leakage and enhance structural strength by overlapping reflection units with optical microstructures and absorption units, allowing full lamination with functional modules.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the light guide plate is fully laminated with functional modules, then structural strength is improved, but light leakage increases due to air layer interface reflections

Engineering Contradiction:

Improvestructural strengthVSAvoidlight leakage

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and eliminates the air layer between the light guide plate and functional modules by directly bonding the functional modules to the light guide plate surface. This removes the harmful interface that causes light leakage while maintaining full lamination for structural strength.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an adhesive layer as an intermediary between the light guide plate and functional modules. This adhesive layer serves as a bonding medium that eliminates air gaps, prevents light leakage at interfaces, and maintains structural strength through full lamination.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If an air layer is present between the light guide plate and functional module, then light guide function is maintained, but image contrast decreases due to interface reflections

Engineering Contradiction:

Improvelight guide functionVSAvoidinterface reflection

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent removes the air layer that causes harmful interface reflections while maintaining the light guide function through direct bonding or adhesive bonding between the light guide plate and functional modules, eliminating the source of image contrast degradation.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The adhesive layer acts as an intermediary that maintains the light guide function while eliminating air-layer-induced reflections. The adhesive provides optical continuity and mechanical bonding, preventing interface reflections that would degrade image contrast.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If optical microstructures are used to guide light, then light guidance is achieved, but light energy is lost due to refraction and light leakage

Engineering Contradiction:

Improvelight guidanceVSAvoidlight energy loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent converts the harmful refraction and light leakage caused by optical microstructures into beneficial effects. By carefully designing the microstructure geometry and combining it with adhesive bonding, the patent maintains light guidance while minimizing energy loss from refraction and leakage at the microstructure interfaces.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 solution reduces light leakage, improves light energy utilization, and enhances structural strength, resulting in improved image contrast and environmental resistance.

Implementation Method 1

Most of the current light guide plates use the interface between the optical microstructure and the air layer to perform total reflection to the light and guide the light to the light-emitting surface

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Implementation Method 2

The absorption layer includes a plurality of first absorption units. The first absorption units respectively overlap at least a part of the reflection units

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 3

The reflection layer includes a plurality of reflection units. The reflection units respectively overlap the plurality of optical microstructures

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS20260003116A1Light guide plate and light source module

Publication Date: 2026.01.01 CORETRONIC CORPORATION

AI summary

A light guide plate includes a plurality of optical microstructures. The plurality of optical microstructures are disposed on a first surface of the light guide plate. An absorption layer including a plurality of first absorption units and a reflection layer including a plurality of reflection units are also provided on the light guide plate. The reflection units respectively overlap the optical microstructures. The first absorption units respectively overlap at least a part of the reflection units. The at least a part of the reflection units are located between the corresponding first absorption units and the optical microstructures. The light guide plate of the disclosure has less light leakage on a non-light emitting surface side. A light source module with the light guide plate is also proposed. The light source module of the disclosure has better light energy utilization rate and is adapted for full lamination with other functional modules.