Backlight Module Integrated Optical Film Brightness Enhancement

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Solution Overview

Problem

Conventional backlight modules suffer from insufficient brightness and high assembly costs due to excessive components, which are not effectively addressed by adding additional diffusion films or microlens films.

Innovation Solution

An integrated optical film comprising a base with a brightness enhancement layer and a diffusion layer is used, where the brightness enhancement layer has columns with dispersed diffusion particles, and the diffusion layer has granular patterns, reducing the number of components while enhancing light scattering and gathering.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If additional diffusion films or microlens films are added to improve brightness, then brightness is improved, but device complexity and assembly cost increase

Engineering Contradiction:

ImprovebrightnessVSAvoidnumber of components

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent merges multiple optical functions (diffusion, light gathering, brightness enhancement) into a single integrated optical film. This film contains both diffusion particles and light gathering columns within one structure, eliminating the need for separate diffusion films and microlens films, thereby reducing component count while maintaining brightness improvement

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated optical film performs multiple functions simultaneously: it diffuses light through dispersed particles, gathers light through column structures, and enhances overall brightness. This multi-functional design replaces what would traditionally require multiple separate components

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Illumination intensity

If multiple optical films (diffusion films, microlens films, prism sheets) are used to enhance brightness, then brightness is improved, but assembly cost increases

Engineering Contradiction:

ImprovebrightnessVSAvoidassembly cost

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

By combining multiple optical functions into one integrated film, the patent reduces the number of assembly steps and components required. The single film structure eliminates the need to assemble multiple separate optical films, directly reducing assembly cost while achieving the same brightness enhancement

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If conventional diffusion films and microlens films are used separately, then light scattering and gathering functions are provided, but the number of components becomes excessive

Engineering Contradiction:

Improveoptical function coverageVSAvoidnumber of components

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent integrates diffusion particles and light gathering columns within a single optical film structure. This merging maintains both light scattering and light gathering functions while reducing the component quantity from multiple separate films to one integrated film

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 integrated optical film significantly improves brightness and reduces assembly costs by minimizing the number of components, achieving a higher brightness of approximately 9901 cd/m2 while maintaining a lower component count compared to conventional modules.

Implementation Method 1

The brightness enhancement layer has a plurality of brightness enhancement columns and a plurality of diffusion particles. The brightness enhancement columns are disposed on the first surface and the diffusion particles are dispersed in the brightness enhancement columns.

Methodology Applied

Scientific EffectLight scattering: Scattering

Implementation Method 2

The integrated optical film includes a base, a brightness enhancement layer and a diffusion layer... the brightness enhancement layer has a plurality of brightness enhancement columns... The diffusion layer has a plurality of granular patterns disposed on the second surface

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 3

The diffusion particles are dispersed in the brightness enhancement columns... The diffusion layer has a plurality of granular patterns disposed on the second surface in an irregular arrangement

Methodology Applied

Scientific EffectLight diffusion: Scattering

Data Source

PatentUS7607813B1Backlight module

Publication Date: 2009.10.27 BOE TECHNOLOGY GROUP CO LTD

AI summary

A backlight module includes a light source and an integrated optical film. The integrated optical film includes a base, a brightness enhancement layer and a diffusion layer. The base has a first surface and a second surface opposite to each other. The brightness enhancement layer has a plurality of brightness enhancement columns and a plurality of diffusion particles. The brightness enhancement columns are disposed on the first surface. The diffusion particles are dispersed in the brightness enhancement columns. The diffusion layer has a plurality of granular patterns disposed on the second surface in an irregular arrangement. Light beams emitted from the light source pass through the diffusion layer, the base and the brightness enhancement layer in proper order.