Display Device Driving Element Heat Dissipation via Inner Frame
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Solution Overview
Problem
Conventional display devices face inefficiencies in heat dissipation from driving elements, as the heat conduction path is limited by the outer frame, which restricts further enhancement of dissipating efficiency.
Innovation Solution
The display device positions the driving element on the inner side of the flexible printed circuit, allowing direct heat conduction to a second metal frame of the back light module, increasing the convection area with cold air and eliminating the need for the outer frame, thereby enhancing heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the driving element is contacted with the outer frame for heat dissipation, then the heat can be conducted to external space, but the dissipating efficiency is limited and cannot be further increased
Solution Approach 1:
The patent extracts the heat dissipation function from the outer frame by introducing a dedicated second frame (heat dissipation frame) that directly contacts the driving element. This separates the heat dissipation pathway from the structural support function, allowing the driving element to dissipate heat through the second frame independently, thereby improving heat dissipation efficiency without complicating the overall structure.
Solution Approach 2:
The second frame acts as an intermediary component between the driving element and the external environment for heat dissipation. It provides a dedicated thermal conduction pathway that mediates the heat transfer process, enabling more efficient heat removal from the driving element while maintaining structural integrity through the first frame and outer frame.
2Shape
If a plastic frame with colorful paint is used to cover the metal frame, then aesthetic feeling is improved, but the heat conduction between the frame and cold air is affected
Solution Approach 1:
The patent segments the frame structure into multiple functional components: the first frame for structural support, the second frame (metal frame) dedicated to heat dissipation, and the plastic frame for aesthetic coverage. This segmentation allows each component to perform its specific function optimally - the metal second frame maintains heat conduction capability while the plastic frame provides aesthetic appearance.
Solution Approach 2:
Different parts of the frame structure are assigned different material properties and functions. The second frame uses metal material with high thermal conductivity for heat dissipation, while the outer plastic frame provides aesthetic appearance. This local differentiation of material quality allows simultaneous achievement of heat conduction efficiency and aesthetic appearance.
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 significantly improves heat dissipation efficiency by increasing the convection area and simplifies the structure, reducing costs and interference from high-frequency signals.
Implementation Method 1
the heat generated by the driving element is directly conducted to the second frame of the back light module
Implementation Method 2
The convection area between the second frame and the cold air is larger, such that the heat conduction is obviously promoted and the dissipating efficiency of the whole structure is increased
Data Source
AI summary
A display device includes a display panel, a flexible printed circuit and a back light module. The flexible printed circuit is suitable for supporting the driving element and is electrically connected to the display panel. The back light module includes at least one light source, a first frame and a second frame. The second frame surrounds the light source, the first frame surrounds the second frame, and the display panel and the flexible printed circuit are disposed at one side of the first frame, wherein the first frame has at least an opening, the second frame has a element contacting surface, the driving element is disposed on the flexible printed circuit, and the element contacting surface protrudes from the opening for being connected to the driving element.