Heat-Radiating Sheet Segmentation for Display Thermal Management
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Solution Overview
Problem
Organic light-emitting display apparatuses face a heat radiation problem when driven, leading to uneven heat distribution and potential low-temperature burns due to concentrated heat in central portions and inadequate heat dissipation at edge portions.
Innovation Solution
A display apparatus with a heat-radiating sheet system, where a first heat-radiating sheet is positioned closer to the heat generating source in the central portion and a second heat-radiating sheet is positioned closer to the display panel in edge portions, both with different vertical heights, along with an insulator to inhibit heat conduction, ensuring even heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single heat-radiating sheet is used uniformly across the display panel, then the structure is simple, but heat distribution becomes uneven with concentrated heat in central portions and inadequate dissipation at edge portions
Solution Approach 1:
The heat-radiating sheet is divided into a first heat-radiating sheet in the central portion and a second heat-radiating sheet in the edge portions, with different vertical heights. This segmentation allows each region to have optimized heat radiation characteristics, preventing heat concentration in the center while improving edge heat dissipation.
Solution Approach 2:
Different regions of the display panel are assigned different heat-radiating sheet configurations - the central portion has a first heat-radiating sheet at one vertical height while edge portions have a second heat-radiating sheet at a different vertical height. This local quality differentiation addresses the specific heat management needs of each region.
2Ease of manufacture
If heat-radiating sheets are positioned at the same vertical height across the display panel, then the manufacturing process is simplified, but heat dissipation efficiency at edge portions remains insufficient
Solution Approach 1:
The solution introduces vertical height as an additional dimension for heat-radiating sheet positioning. By varying the vertical height of heat-radiating sheets between central and edge portions, the patent optimizes heat dissipation paths without complicating the horizontal positioning process.
3Loss of energy
If no insulator is used between the heat-radiating sheet and display panel, then heat conduction is maximized, but heat cannot be effectively distributed to edge portions for dissipation
Solution Approach 1:
An insulator is introduced as an intermediary element between the display panel and the heat-radiating sheets. This insulator strategically blocks heat conduction paths to redirect heat flow toward edge portions, enabling more uniform heat distribution across the display panel surface.
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 enhances heat dissipation from edge portions, preventing excessive temperature rises and low-temperature burns by evenly distributing heat across the display surface, improving overall thermal management.
Implementation Method 1
a heat-radiating sheet located on a non-display surface of the display panel
Implementation Method 2
an insulator for inhibiting heat conduction, being located between the first heat-radiating sheet and the display panel
Implementation Method 3
a heat-radiating sheet located on a non-display surface of the display panel
Data Source
AI summary
A display apparatus includes a display panel, and a heat-radiating sheet located on a non-display surface of the display panel, wherein the heat-radiating sheet includes a first heat-radiating sheet in a central portion of the display panel, and a second heat-radiating sheet in edge portions of the display panel, and locations (heights) of the first heat-radiating sheet and the second heat-radiating sheet in a vertical direction are different from each other.