Thermally Conductive Indicium Layers for Cooler Device Surfaces

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Solution Overview

Problem

Integrated circuits in electronic devices generate significant heat, which can lead to elevated surface temperatures that may cause user discomfort and potential injury, especially in portable devices with limited space for heat dissipation.

Innovation Solution

An indicium with multiple layers, including a thermally conductive layer positioned between a cosmetic and support layer, directs heat away from the heat-generating component to the device housing, utilizing materials like copper and stainless steel to manage heat distribution and aesthetics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If integrated circuits perform higher complexity operations, then functionality is improved, but heat generation increases causing user discomfort and potential injury

Engineering Contradiction:
ImprovefunctionalityVSAvoidheat generation
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful heat generated by integrated circuits into a beneficial effect by using the heat itself to drive a thermoelectric generator that produces electrical power. The thermoelectric generator utilizes the temperature differential between the hot component and the cooler housing to generate electricity, thereby converting waste heat into useful energy and reducing the harmful thermal effects.

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

Solution Approach 2:

The patent introduces a thermally conductive layer as an intermediary between the heat-generating integrated circuit and the device housing. This layer acts as a mediator to facilitate controlled heat transfer, distributing the thermal energy across a larger area of the housing to reduce localized temperature peaks that could cause user discomfort or injury.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Temperature

If heat is directed to the device housing, then heat dissipation is improved, but surface temperature may still be elevated

Engineering Contradiction:
Improveheat dissipationVSAvoidsurface temperature
Core Design Contradiction:
TemperatureVSObject-affected harmful factors

Solution Approach 1:

The patent segments the thermal management function by dividing it into multiple components: a thermally conductive layer for heat distribution, a thermoelectric generator for heat-to-energy conversion, and the housing structure for final heat dissipation. This segmentation allows each component to perform its specific function optimally, with the thermoelectric generator creating a temperature differential that drives heat flow while generating power, and the housing distributing heat across its surface area to reduce localized temperatures.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent changes the thermal parameters of the system by introducing materials with specific thermal conductivities and utilizing the thermoelectric effect. The thermally conductive layer has high thermal conductivity to facilitate heat transfer, while the thermoelectric generator exploits the Seebeck effect to convert temperature differential into electrical energy, thereby changing the thermal energy pathway and reducing harmful surface temperatures.

Inventive Principle:
Principle #35Parameter changes

3Temperature

If a thermally conductive layer is added to the indicium, then heat management is improved, but device complexity increases

Engineering Contradiction:
Improveheat managementVSAvoidstructure
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The patent applies multi-functionality to the indicium by integrating multiple functions into a single component structure. The indicium serves as both a cosmetic identifier and a thermal management element. The thermally conductive layer within the indicium performs heat distribution, while the thermoelectric generator embedded in the indicium generates power, allowing the indicium to simultaneously fulfill aesthetic, thermal, and energy generation functions without requiring separate dedicated components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the cosmetic indicium with the thermal management system by integrating the thermally conductive layer and thermoelectric generator directly into the indicium structure. This consolidation eliminates the need for separate heat sinks or power generation components, reducing overall device complexity while achieving effective heat management and energy recovery.

Inventive Principle:
Principle #5Merging (Combining)

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 indicium effectively dissipates heat from the heat-generating components, maintaining a cooler surface temperature for user contact and reducing the risk of thermal discomfort or injury while providing aesthetic appeal.

Implementation Method 1

a second layer coupled with the first layer, the second layer including a second thermal conductivity different from the first thermal conductivity. The second metal may be configured to: receive thermal energy from the heat-generating component, and direct at least some of the thermal energy to the housing

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20250261340A1Electronic devices including an indicium with a thermal conduit
Publication Date: 2025.08.14 APPLE INC
  • US20250261340A1 patent drawing
  • US20250261340A1 patent drawing
  • US20250261340A1 patent drawing

AI summary

An indicium (e.g., logo) for an electronic device includes multiple layers of material bonded together, with at least one of the layers having a relatively higher thermal conductivity than the other layers. Using the layer with the higher thermal conductivity, the indicium may direct heat away from a heat-generating component and distribute the heat to a housing of the electronic device. In order to provide a particular appearance, the indicium may include a layer that covers the relatively higher thermally conductive layer. Based on the higher thermally conductive layer, the indicium may limit or prevent heat flow through the layer covering the thermally conductive layer.