Backlight Module Optical Film Snap-Fixing for Narrow Bezel

Solution Overview

Problem

Current backlight modules for LCDs face challenges in achieving a narrow bezel and firm connection between the optical film and the back plate, leading to wave warping and a wider non-visual bezel due to the reliance on through holes and supports, which compromises the display's flatness and increases costs.

Innovation Solution

A backlight module design featuring a light guide plate with snap-fitted optical film fixing portions that evenly distribute gravity, eliminating the need for back plate supports and reducing bezel width by integrating the optical film directly onto the light guide plate's surfaces, utilizing snap-fitting mechanisms to secure the film layers and enhance assembly firmness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If through holes and supports are used to fix the optical film, then the optical film can be secured to the back plate, but the bezel width increases and the display flatness deteriorates

Engineering Contradiction:

Improveoptical film fixationVSAvoidbezel width

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The optical film is merged with the light guide plate through direct fixation. The fixing portion of the optical film is snap-fitted to the fixing surface of the light guide plate, eliminating the need for separate supports and through holes, thereby reducing bezel width while maintaining fixation reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The supports and through holes are extracted (removed) from the structure. By taking out these unnecessary components and using the light guide plate's own fixing surface, the design achieves a narrower bezel while maintaining the optical film fixation function

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If through holes and supports are used to fix the optical film, then the optical film can be secured to the back plate, but the assembly firmness deteriorates and wave warping occurs

Engineering Contradiction:

Improveoptical film fixationVSAvoiddisplay flatness

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The optical film is merged with the light guide plate through direct fixation. The fixing portion of the optical film is snap-fitted to the fixing surface of the light guide plate, eliminating the need for separate supports and through holes, thereby reducing bezel width while maintaining fixation reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The light guide plate serves itself by providing the fixing surface for the optical film. The fixing surface on the light guide plate enables the optical film to be secured without requiring additional supports or complex fixation structures, thereby improving assembly firmness and preventing wave warping

Inventive Principle:

Principle #25Self-service

3Reliability

If through holes and supports are used to fix the optical film, then the optical film can be secured to the back plate, but the manufacturing cost increases

Engineering Contradiction:

Improveoptical film fixationVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The optical film is merged with the light guide plate through direct fixation. The fixing portion of the optical film is snap-fitted to the fixing surface of the light guide plate, eliminating the need for separate supports and through holes, thereby reducing bezel width while maintaining fixation reliability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The supports and through holes are extracted (removed) from the structure. By taking out these unnecessary components and using the light guide plate's own fixing surface, the design achieves a narrower bezel while maintaining the optical film fixation function

Inventive Principle:

Principle #2Taking out (Extraction)

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 ensures a flat display with reduced bezel width, improved assembly firmness, and cost savings by eliminating the need for back plate supports, while maintaining the structural integrity and optical performance of the LCD.

Implementation Method 1

snap-fitted to the at least one fixing surface of the light guide plate

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

snap-fitting mechanisms to secure the film layers and enhance assembly firmness

Methodology Applied

Scientific EffectMechanical fastening: Mechanical Fastener

Implementation Method 3

light guide plate, including a light incident surface and a light exit surface that are adjacent to each other

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Data Source

PatentUS11537003B2Backlight module and display device

Publication Date: 2022.12.27 K TRONICS (SUZHOU) TECH CO LTD

AI summary

Disclosed are a backlight module and a display device. An optical film includes a main body portion and at least one fixing portion connected to the main body portion, the main body portion is fixed to a light exit surface of a light guide plate, and the fixing portion is snap-fitted to a fixing surface of the light guide plate; the fixing portion is snap-fitted to the fixing surface of the light guide plate.