Graphite Sheet Penetrating Mold Slot for Display Heat Dissipation
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Solution Overview
Problem
Display devices face challenges in effectively dissipating heat generated from the emission layer, leading to thermal stress and reduced efficiency and lifespan due to inadequate heat management.
Innovation Solution
The use of graphite sheets with a central portion on the rear surface of the display panel and end portions passing through mold slots in the mold frame, along with a curved portion that penetrates the mold frame, enhances heat dissipation by transferring heat to the back cover, thereby improving thermal conductivity and reducing surface temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a graphite sheet is attached to the rear surface of the display panel, then heat dissipation is improved, but the graphite sheet cannot effectively transfer heat to the back cover due to the mold frame blocking the heat path
Solution Approach 1:
The graphite sheet is divided into multiple sections: a front portion on the display panel, a curved portion that bends around the mold frame, and a rear portion on the back cover. This segmentation allows the heat dissipation path to continue around the obstacle (mold frame) rather than being blocked, effectively transferring heat from the front to the rear while maintaining thermal conductivity throughout the entire structure.
2Temperature
If the graphite sheet is made thick to improve heat dissipation, then thermal conductivity increases, but the curved portion cannot penetrate the mold slot portion
Solution Approach 1:
The graphite sheet has non-uniform thickness: the front and rear portions are thicker for effective heat conduction, while the curved portion has reduced thickness to enable bending and penetration through the mold slot. This local variation in thickness allows the sheet to simultaneously achieve good thermal conductivity where needed and geometric flexibility where required, resolving the contradiction between heat dissipation performance and manufacturability.
3Loss of energy
If the graphite sheet passes through the mold slot portion, then heat transfer to the back cover is enabled, but the graphite sheet may shift position during assembly
Solution Approach 1:
The curved portion of the graphite sheet is nested within the mold slot portion, with the mold frame acting as a containing structure. The mold slot serves as a guide and constraint that holds the curved portion in place, preventing lateral shifting during assembly and use. This nesting arrangement simultaneously enables heat transfer through the mold frame while providing positional stability through the structural constraint of the mold slot.
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
This configuration effectively reduces the surface temperature of the display panel by up to 15 degrees Celsius compared to conventional methods, enhancing heat dissipation and extending the device's lifespan and efficiency.
Implementation Method 1
a graphite sheet is attached to a rear surface of the display device to diffuse heat generated from the emission layer. The graphite sheet is a thermal spread sheet, and is a product obtained by thermally processing natural graphite to increase thermal conductivity.
Data Source
AI summary
A display device includes a display panel, a mold frame, and graphite sheets. The mold frame includes a mold slot portion therethrough to support the display panel. The graphite sheets include a central portion on a rear surface of the display panel, and end portions passing through the mold slot portion to be on the rear surface of the mold frame. The graphite sheet is rolled and arranged in a mounting space between the display panel and a back cover, such that heat generated from the display panel may be dissipated to the outside via the graphite sheet and the back cover.