Lamp Fixing Structure for Backlight Module Wire Reliability

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Solution Overview

Problem

Conventional backlight modules for LCDs face issues with solder cracks between lamps and wires due to external forces, leading to unreliable connections and increased production costs, particularly because of complex manual wire winding processes.

Innovation Solution

A lamp fixing structure with a lamp holder and protecting member featuring a pressing part and a first hole, where the wire passes through the hole, allowing the pressing part to secure the wire tightly, and a chamber for easy electrical connection, eliminating the need for complex winding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the wire is connected to the lamp by hook-soldering inside the lamp protecting member, then electrical connection is achieved, but solder cracks occur due to external force application

Engineering Contradiction:

Improvesolder connection reliabilityVSAvoidsolder crack from external force

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The lamp protecting member is divided into two functional regions: a first region for wire passing through and a second region for lamp insertion. This segmentation allows the wire to be routed through a dedicated passage that provides mechanical protection, separating the electrical connection function from the mechanical protection function and preventing solder cracks from external forces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary structure (the protected passage through the lamp protecting member) that mediates between the wire and the external environment. This intermediary provides a protected route for the wire, isolating the soldered connection from direct exposure to external forces that would cause cracking.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If manual wire winding is used to fix the wire, then solder crack resistance is improved, but production time and cost increase significantly

Engineering Contradiction:

Improvewire fixation reliabilityVSAvoidproduction time

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The lamp protecting member is designed to automatically perform the wire fixation function through its inherent structure. The first region with the integrated passage self-services by providing both wire routing and fixation capabilities, eliminating the need for separate manual wire winding operations and reducing production time while maintaining reliability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent merges multiple functions into the lamp protecting member: protection function, wire guiding function, and wire fixation function. By combining these functions into a single integrated component with a specifically designed passage, the need for separate manual wire winding steps is eliminated, improving productivity while maintaining wire fixation reliability.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If the lamp and wire are inserted through a slit after soldering, then assembly is completed, but the connected parts are damaged due to diameter mismatch

Engineering Contradiction:

Improveassembly processVSAvoidconnected parts integrity

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The lamp protecting member is segmented into distinct functional regions: a first region with a passage for wire insertion and a second region for lamp insertion. This segmentation allows each component (wire and lamp) to be inserted through appropriately sized openings, preventing damage to the soldered connection that would occur if both had to pass through a narrow slit.

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If a small hole is provided in the lamp protecting member for wire passage, then wire routing is achieved, but the wire is not securely fixed and solder cracks occur

Engineering Contradiction:

Improvewire routingVSAvoidwire fixation security

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The lamp protecting member is divided into a first region for wire passage and a second region for lamp insertion. The first region contains a specifically designed passage that not only routes the wire but also provides fixation capability, segmenting the functions of wire routing and wire securing into a dedicated structural region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from a simple hole (one-dimensional opening) to a three-dimensional passage structure with varying cross-sections along its length. This dimensional change allows the passage to provide both wire routing and mechanical fixation through its expanded or constricted sections, ensuring wire security while maintaining ease of manufacture.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS7722242B2Lamp fixing structure and backlight module

Publication Date: 2010.05.25 INNOLUX CORP

AI summary

A lamp fixing structure is arranged with a lamp which has an electrode and a wire electrically connected to the electrode. The lamp fixing structure includes a lamp holder and at least one lamp protecting member. The lamp holder has at least one pressing part. The lamp protecting member has a first hole. The lamp is inserted into the lamp protecting member. The wire passes through the lamp protecting member from the first hole. The pressing part presses the lamp protecting member so that the first hole is fitted to the wire tightly.