Flash LED Cover Heat Dissipation Sheet for Surface Temperature Control

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Solution Overview

Problem

Portable electronic devices with flash LEDs face issues with local heating, leading to temperature increases that can cause user inconvenience and potential accidents.

Innovation Solution

An electronic device is designed with a heat dissipation sheet attached to the cover, featuring a heat diffusion member and a light reflection member to effectively dissipate heat and reflect light, thereby reducing temperature rises.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a flash LED is used for lighting functions, then illumination intensity is improved, but temperature increases causing heat accumulation

Engineering Contradiction:

Improveflash LED light outputVSAvoidsurface temperature

Core Design Contradiction:

Illumination intensityVSTemperature

Solution Approach 1:

A heat dissipation sheet is introduced as an intermediary component between the flash LED and the cover. This sheet includes a light reflection member that reflects light toward the light transmission portion and a heat diffusion member that diffuses heat, thereby mediating the thermal and optical interaction between the LED and cover.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The heat dissipation sheet is formed as a composite structure combining a light reflection member and a heat diffusion member. This composite material approach allows simultaneous optimization of light reflection efficiency and heat diffusion performance, resolving the contradiction between illumination and heat management.

Inventive Principle:

Principle #40Composite materials

2Duration of action of moving object

If the flash LED operates continuously, then illumination function is maintained, but heat accumulation increases leading to safety concerns

Engineering Contradiction:

Improveflash LED operation durationVSAvoidheat accumulation

Core Design Contradiction:

Duration of action of moving objectVSObject-affected harmful factors

Solution Approach 1:

The heat dissipation sheet converts the harmful heat energy into beneficial diffusion patterns. The heat diffusion member spreads heat over a larger area, and the light reflection member redirects light energy, effectively converting the harmful thermal accumulation into manageable heat distribution while maintaining continuous operation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Temperature

If a heat dissipation structure is added to reduce temperature, then temperature control is improved, but device complexity increases

Engineering Contradiction:

Improvesurface temperature controlVSAvoidstructure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The heat dissipation sheet performs multiple functions simultaneously: it reflects light toward the transmission portion, diffuses heat across the cover surface, and protects the flash LED from thermal damage. This multi-functional design reduces the need for separate components, thereby limiting the increase in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The heat dissipation sheet is implemented as a thin film structure rather than a bulky mechanical cooling system. This flexible film approach provides effective heat dissipation and light reflection without significantly increasing device thickness or structural complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

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 implementation of the heat dissipation sheet significantly reduces the surface temperature of the electronic device, enhancing user safety and device performance by preventing heat accumulation.

Implementation Method 1

a light reflection member disposed on the second surface of the cover to surround at least a portion of the light transmission portion... the light reflection member is configured to reflect a portion of the flash light, emitted by the light source, in a direction toward the inner space from the cover

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 2

a heat dissipation sheet attached on the second surface of the cover to surround at least a portion of the light transmission portion... the heat dissipation sheet includes a heat diffusion member... significantly reduces the surface temperature of the electronic device, enhancing user safety and device performance by preventing heat accumulation

Methodology Applied

Scientific EffectHeat dissipation: Conduction (thermal)

Data Source

PatentUS20250031509A1Electronic device including at least one light source and heat dissipation structure

Publication Date: 2025.01.23 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a cover including a first surface which is a portion of an outer surface of the electronic device and a second surface facing in a direction opposite to the first surface, and including a light transmission portion, a substrate disposed in an inner space of the electronic device, a light source disposed on the substrate to emit light through the light transmission portion, and a heat dissipation sheet disposed on the second surface of the cover to surround at least a portion of the light transmission portion, and a heat dissipation sheet attached on the second surface of the cover to surround at least a portion of the light transmission portion, wherein the heat dissipation sheet includes a heat diffusion member, and a light reflection member.