Slit Heat Dissipation Sheet for Rollable Display Bending
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Solution Overview
Problem
Electronic devices with rollable or flexible displays face challenges in heat dissipation due to the deformation of conventional heat dissipation sheets when subjected to repeated folding or bending, necessitating a flexible and extendible heat dissipation solution.
Innovation Solution
A heat dissipation structure with a slit structure that allows for flexibility and extendibility, featuring a bending area with a slit extending along a specific direction, and a heat dissipation sheet that faces display areas and a folding area, ensuring durability and effective heat diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional heat dissipation sheet made of highly conductive metal material is used, then heat dissipation efficiency is improved, but the sheet permanently deforms when subjected to repeated rolling or folding motions
Solution Approach 1:
The patent applies this principle by using a flexible polymer substrate instead of rigid metal for the heat dissipation sheet. The polymer material inherently provides flexibility and elastic recovery, allowing the sheet to undergo repeated folding and bending without permanent deformation while still maintaining heat dissipation functionality through thermal conductive coatings or structures applied to the flexible base.
Solution Approach 2:
The patent employs composite materials by combining a flexible polymer substrate with thermal conductive materials (such as metal coatings, ceramic layers, or thermally conductive fillers embedded in the polymer). This composite structure integrates the flexibility and elastic recovery of the polymer with the high thermal conductivity of the conductive materials, resolving the contradiction between heat dissipation efficiency and durability under deformation.
2Temperature
If a rigid heat dissipation sheet is used, then heat dissipation performance is improved, but the sheet cannot accommodate the folding or bending of rollable or flexible displays
Solution Approach 1:
The patent applies this principle by replacing rigid metal heat dissipation sheets with flexible polymer-based sheets that can conform to the folding and bending of rollable or flexible displays. The flexible substrate allows the heat dissipation structure to adapt to various configurations while maintaining thermal management functionality.
Solution Approach 2:
The patent applies this principle by designing a heat dissipation sheet that dynamically adapts its shape and configuration along with the display device. The flexible material allows the sheet to transition between different states (flat, folded, bent) without compromising structural integrity or heat dissipation performance, enabling the system to maintain functionality across multiple operational states.
3Adaptability or versatility
If the heat dissipation sheet is made flexible to accommodate folding, then adaptability is improved, but heat dissipation efficiency may be reduced
Solution Approach 1:
The patent resolves this contradiction by creating a composite structure where a flexible polymer substrate is combined with high thermal conductivity materials. The polymer provides the necessary flexibility and adaptability for folding, while the thermal conductive coatings or embedded materials ensure efficient heat dissipation is maintained despite the flexible nature of the substrate.
Solution Approach 2:
The patent applies this principle by applying thermal conductive materials selectively to specific regions of the flexible substrate where heat dissipation is most critical. This localized approach ensures high heat dissipation efficiency in key areas while maintaining the overall flexibility and adaptability of the sheet structure.
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 solution prevents heat concentration on the display, enhancing user convenience by securing durability and efficient heat dissipation in devices with rollable or flexible displays.
Implementation Method 1
a heat dissipation sheet configured to receive heat generated from the electrical component
Data Source
AI summary
According to various embodiments of the disclosure, an electronic device may comprise a housing including a first housing and a second housing for guiding a sliding movement of the first housing, a display having at least a portion configured to be unfolded based on the sliding movement of the first housing and including a first display area disposed on the first housing and a second display area extending from the first display area, an electrical component disposed in the housing, a heat dissipation sheet configured to receive heat generated from the electrical component and including a bending area facing the first display area and a fixed area facing the second display area, and a slit structure formed in at least a portion of the bending area and including at least a portion extending along a first direction inclined from a direction of the sliding movement of the first housing.