Vapor Chamber Wick Layout for Display Panel and Board Cooling
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Solution Overview
Problem
Existing display devices face challenges in efficiently dissipating heat from both the display panel and the driving board, which can degrade performance and accelerate burn-in phenomena.
Innovation Solution
A vapor chamber is positioned between the display panel and the driving board, featuring a first wick on the inner surface facing the panel and a second wick on the inner surface facing the board, with the first wick occupying a larger area than the second, and a refrigerant dense part for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single wick structure is used in the vapor chamber, then the structure is simple, but heat dissipation from both the display panel and driving board is insufficient
Solution Approach 1:
The vapor chamber is divided into a first vapor chamber portion facing the display panel and a second vapor chamber portion facing the driving board, with separate wick structures in each portion. This segmentation allows independent optimization of heat dissipation for each heat-generating component, improving overall heat dissipation efficiency while maintaining manageable structural complexity through modular design.
Solution Approach 2:
Different wick structures are designed for different regions: the first wick structure in the first vapor chamber portion is optimized for heat dissipation from the display panel, while the second wick structure in the second vapor chamber portion is optimized for the driving board. This local quality approach ensures each region has the appropriate heat dissipation characteristics for its specific thermal requirements.
2Reliability
If the wick area is increased to improve heat dissipation, then heat dissipation efficiency improves, but the space for refrigerant circulation is reduced
Solution Approach 1:
The vapor chamber is segmented into two portions, each with its own wick structure and refrigerant circulation space. This allows the total wick area to be distributed across both portions, maintaining sufficient refrigerant circulation space in each portion while achieving comprehensive heat dissipation coverage for both the display panel and driving board through the combined wick areas.
Solution Approach 2:
The vapor chamber utilizes the third dimension (vertical spacing between the display panel and driving board) to accommodate both wick structures and refrigerant circulation paths. By extending the vapor chamber structure in the vertical direction, sufficient space is provided for refrigerant circulation while maintaining adequate wick surface area for heat dissipation.
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 effectively dissipates heat from both the display panel and the driving board, improving performance and reducing burn-in, while promoting refrigerant circulation for enhanced cooling efficiency.
Implementation Method 1
a first wick and a second wick which are disposed on at least parts of inner surfaces of the external member and face each other
Implementation Method 2
a refrigerant which is contained in the external member
Data Source
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AI summary
A display device includes a display panel, a driving board disposed on a side of the display panel, and a vapor chamber disposed between the display panel and the driving board, wherein the vapor chamber includes an external member, a first wick and a second wick which are disposed on at least parts of inner surfaces of the external member and face each other, a refrigerant which is contained in the external member, and a refrigerant dense part in which the refrigerant densely resides, and an area occupied by the first wick on the inner surfaces of the external member is greater than an area occupied by the second wick on the inner surfaces of the external member.