OLED Display Back Cover Hemming for Stiffness and Heat Dissipation
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Solution Overview
Problem
OLED display apparatuses face challenges in achieving sufficient stiffness and heat radiation performance due to their lightweight and thin design, making it difficult to integrate mechanical structures for support and heat dissipation.
Innovation Solution
A display apparatus with a back cover featuring a hemming part that is bent to form a space for a heat radiation member, including heat radiation pins and an extension member, which enhances stiffness and heat radiation efficiency by maintaining a uniform air gap and facilitating heat transfer through convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If OLED display apparatus uses lightweight and thin design, then weight and thickness are reduced, but stiffness and mechanical support capability deteriorate
Solution Approach 1:
The patent combines multiple functions into the back cover: it serves as both the rear protective cover and the heat radiation structure. The heat radiation member is integrated within the back cover assembly, merging the support function and heat dissipation function into a single unified structure, thereby providing mechanical support without adding separate heavy components.
Solution Approach 2:
The patent utilizes the depth dimension by creating a hemming part that bends toward the rear surface, forming a three-dimensional structure within the back cover. This dimensional change allows the heat radiation member to be positioned in a folded configuration, maximizing heat radiation area while maintaining a thin overall profile.
2Weight of moving object
If OLED display apparatus uses lightweight and thin design, then weight and thickness are reduced, but heat radiation performance deteriorates
Solution Approach 1:
The heat radiation member is nested within the back cover assembly, specifically positioned within the hemming part. This nesting allows the heat radiation structure to be contained within the existing back cover volume, providing effective heat dissipation without increasing the overall size or weight of the display apparatus.
Solution Approach 2:
The hemming part is formed by bending the back cover to create a curved, folded structure that faces the rear surface. This curvature creates an extended surface area for heat radiation while maintaining a compact form factor, allowing heat to dissipate more effectively from the OLED panel through the back cover.
3Strength
If back cover is bent to form hemming part, then stiffness and heat radiation area are increased, but manufacturing complexity increases
Solution Approach 1:
The hemming part is formed as an integral part of the back cover through bending, combining the structural support function and the heat radiation surface into a single formed component. This integration eliminates the need for separate heat radiation plates or additional structural supports, simplifying the overall manufacturing process despite the bending operation.
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 increases the stiffness of the display apparatus, improves heat radiation performance, and prevents afterimage issues by maintaining a flat surface and utilizing a heat radiation member within the formed space, effectively addressing the limitations of OLED display designs.
Implementation Method 1
facilitating heat transfer through convection
Implementation Method 2
heat radiation pins coupled to heat radiation holes
Data Source
AI summary
Discussed is a display apparatus including a display panel, and a back cover coupled to a rear surface of the display panel. The back cover includes a hemming part formed to face a rear surface of the back cover by bending at least a portion of the back cover.