Backlight Assembly Optical Plate Snap-Fix Mechanism

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Solution Overview

Problem

Conventional LCD backlight assemblies rely on double-sided adhesive tape to prevent the optical plate from moving, which is time-consuming and inefficient.

Innovation Solution

The backlight assembly incorporates a fixing portion with protrusions and a receiving member with combination portions, including a separation preventing portion and a supporting portion, to securely attach the optical plate without the need for adhesive tape, using a protrusion and connecting portion design that fits into a combination groove to prevent separation and deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If double-sided adhesive tape is used to attach the optical plate to the mold frame, then the optical plate can be prevented from moving, but the assembly process becomes time-consuming and less efficient

Engineering Contradiction:

Improvestability of optical plate attachmentVSAvoidassembly speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent removes the adhesive tape from the assembly process entirely, replacing it with a mechanical snap-fit structure where the optical plate's protrusion engages with the mold frame's groove, enabling tool-free, rapid assembly while maintaining secure attachment

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the chemical bonding mechanism of adhesive tape with a mechanical interlocking system consisting of a protrusion on the optical plate that fits into a groove on the mold frame, providing both ease of assembly and reliable fixation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If adhesive tape is used to secure the optical plate, then the optical plate remains stable, but the assembly process becomes more complex and less automated

Engineering Contradiction:

Improveoptical plate fixationVSAvoidassembly process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent eliminates the adhesive tape component and the manual application steps associated with it, replacing the entire chemical bonding process with a simple mechanical snap-fit operation that can be performed by hand or automated easily

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent substitutes the multi-step adhesive application and drying process with a single mechanical insertion motion where the optical plate is snapped into place, significantly simplifying the assembly procedure

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If adhesive tape is used to attach the optical plate, then the optical plate can be held in position, but the assembly time increases

Engineering Contradiction:

Improveoptical plate positioningVSAvoidassembly time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The optical plate is pre-formed with an integrated protrusion structure during manufacturing, and the mold frame includes pre-formed grooves, allowing both components to be ready for immediate snap-fit assembly without requiring additional preparation steps

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces the time-consuming adhesive application, positioning, and drying/waiting process with an immediate mechanical snap-fit operation that secures the optical plate in a single motion, eliminating waiting time entirely

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS7901126B2Backlight assembly and method of assembling the same

Publication Date: 2011.03.08 SAMSUNG DISPLAY CO LTD

AI summary

A backlight assembly comprises an optical plate that has a fixing portion and a receiving member that has a combination portion combined with the fixing portion. The fixing portion comprises a protrusion that is extended from the optical plate and a connecting portion that is bent with respect to and extended from the protrusion.