Bent PCB Light Module Wiring Protection

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Solution Overview

Problem

Bending printed circuit boards (PCBs) to arrange light emitting diodes (LEDs) in backlight assemblies can damage metal wiring, increasing manufacturing complexity and costs as multiple PCBs are required, complicating the arrangement of LEDs with desired orientations.

Innovation Solution

A light module for a backlight assembly featuring a printed circuit board with a bent shape, where the first and second portions are connected by a bend, with wiring connecting members on protrusions and assistance connecting members to prevent damage to metal wiring during bending, ensuring secure electrical connections between LEDs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a printed circuit board (PCB) is bent to arrange light emitting diodes (LEDs) with a predetermined angle, then the arrangement flexibility of LEDs is improved, but the metal wiring at the bent portion may be damaged

Engineering Contradiction:

Improvearrangement flexibility of LEDsVSAvoidintegrity of metal wiring

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The PCB is divided into a first portion and a second portion connected by a bend, with wiring connecting members positioned at the bent portion to segment the wiring path and prevent damage to the metal wiring during bending

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Wiring connecting members are introduced as intermediary elements at the bent portion of the PCB to transfer electrical connections between the first and second portions without requiring continuous metal wiring through the bend, thereby preventing wiring damage

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple printed circuit boards (PCBs) are used to arrange light emitting diodes (LEDs), then the arrangement flexibility of LEDs is improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improvearrangement flexibility of LEDsVSAvoidnumber of PCBs

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple PCB functions are merged into a single bent PCB structure, where the first and second portions of the same PCB board perform the roles that would otherwise require separate PCBs, thereby reducing device complexity and manufacturing cost

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If multiple printed circuit boards (PCBs) are used to arrange light emitting diodes (LEDs), then the arrangement flexibility of LEDs is improved, but the manufacturing process becomes more complicated

Engineering Contradiction:

Improvearrangement flexibility of LEDsVSAvoidmanufacturing process complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The manufacturing process is segmented into distinct steps: forming the bent PCB shape, positioning wiring connecting members at the bent portion, and mounting LEDs on the first and second portions, thereby simplifying the overall manufacturing process compared to assembling multiple separate PCBs

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8882330B2Light module having a bent portion between light sources

Publication Date: 2014.11.11 SAMSUNG DISPLAY CO LTD

AI summary

A light module for a backlight assembly that prevents metal wiring from being damaged at a bent portion and a backlight assembly including the same are presented. The light module for the backlight assembly includes: a printed circuit board (PCB) including a first portion and a second portion connected by a connection having a bend; a first light source formed on the first portion of the printed circuit board (PCB); a second light source formed on the second portion of the printed circuit board (PCB); a first wiring connecting member connected to the first light source and formed on the first portion; and a second wiring connecting member connected to the second light source and formed on the second portion, wherein the first wiring connecting member and the second wiring connecting member are connected to each other.