Protective Member Height Exceeds Sealing Resin in Flexible LED

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Solution Overview

Problem

Existing light emitting devices with flexible substrates face damage to sealing resin members during packaging and shipping due to friction, and when attached to heat sinks, the sealing resin members can be crushed under pressure.

Innovation Solution

A protective member with a height greater than the sealing resin member is disposed adjacent to the sealing resin and electronic components, preventing damage by cushioning against external forces and pressures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the light emitting device uses a flexible substrate with sealing resin members, then the device achieves flexibility and light emission functionality, but the sealing resin members are damaged during packaging and shipping due to friction

Engineering Contradiction:

ImproveflexibilityVSAvoidsealing resin member integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A protective member is provided on the flexible substrate that extends beyond the sealing resin members in plan view. This protective member acts as a cushioning element that absorbs friction and external forces during packaging and shipping, preventing damage to the sealing resin members while maintaining the flexible nature of the device

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Temperature

If the light emitting device is attached to heat sinks, then heat dissipation is improved, but the sealing resin members are crushed under pressure

Engineering Contradiction:

Improveheat dissipationVSAvoidsealing resin member integrity

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The protective member serves as a cushioning barrier between the heat sink and the sealing resin members. When the device is attached to heat sinks, the protective member absorbs the pressing force, preventing the sealing resin members from being crushed while allowing effective heat dissipation

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If the protective member height is greater than the sealing resin member height, then damage prevention is improved, but the device structure becomes more complex

Engineering Contradiction:

Improvesealing resin member protectionVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The protective member is integrated into the flexible substrate as a single structural element rather than a separate component. This multi-functional design provides both structural support and protective cushioning in one element, preventing damage to sealing resin members without significantly increasing device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9385283B2Light emitting device equipped with protective member

Publication Date: 2016.07.05 NICHIA CORP

AI summary

A light emitting device includes a light emitting device body and a protective member. The light emitting device body has a flexible base member, at least one light emitting element arranged on the base member, and a sealing resin member sealing the light emitting element. The protective member is disposed adjacent to the sealing resin member on the base member. The protective member has a height greater than a height of the sealing resin member.