Rollable Display Panel Heat Pipe Layout for Flexible Cooling
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Solution Overview
Problem
Existing display devices face challenges in effectively diffusing and releasing heat generated during operation, particularly in rollable display panels, where conventional heat dissipation methods like heat dissipation sheets may not suffice due to limitations in flexibility and rolling characteristics.
Innovation Solution
Incorporation of a heat pipe in contact with a metal layer within the display device, which is insulated from the transistor and does not overlap with the light emitting element, along with a flexible film structure that allows for efficient heat dissipation even in rolled configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat dissipation sheets are used in rollable display panels, then heat dissipation function is provided, but flexibility and rolling characteristics are limited
Solution Approach 1:
The patent employs flexible thin film structures including a flexible heat dissipation sheet and a flexible reflective sheet that can bend and roll without compromising their heat dissipation and light reflection functions. These thin films are designed with sufficient flexibility to accommodate the rolling motion of the display panel while maintaining their thermal and optical performance.
Solution Approach 2:
The patent introduces a flexible reflective sheet positioned between the display panel and the heat dissipation sheet, creating a multi-layer structure that addresses both heat dissipation and flexibility requirements through dimensional arrangement. This layered configuration allows the system to maintain effective heat management while enabling the rollable display to bend and fold properly.
2Temperature
If a heat pipe is added to enhance heat dissipation, then heat diffusion and discharge are improved, but device complexity increases
Solution Approach 1:
The patent integrates the heat pipe with the existing metal layer within the display panel structure, combining the heat dissipation function with the structural components already present. This merging approach allows the heat pipe to utilize the metal layer as part of its heat conduction path, reducing the need for separate heat dissipation components and simplifying the overall device structure.
Solution Approach 2:
The metal layer serves multiple functions: it provides structural support within the display panel, acts as an electrical connection layer, and simultaneously serves as a heat conduction path for the heat pipe. This multi-functionality reduces the need for additional dedicated heat dissipation components, thereby reducing device complexity while maintaining effective heat management.
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 heat pipe enhances the diffusion and discharge of heat generated in the display panel, maintaining operational efficiency and image quality by minimizing interference with the rolling mechanism and ensuring consistent performance across different states.
Implementation Method 1
a heat pipe in contact with the metal layer
Implementation Method 2
The heat pipe enhances the diffusion and discharge of heat generated in the display panel
Data Source
AI summary
A display device includes: a first base layer; a second base layer on the first base layer; a pixel circuit layer on the second base layer, the pixel circuit layer including a transistor; a display element layer on the pixel circuit layer, the display element layer including a light emitting element electrically connected to the transistor; a metal layer between the first base layer and the second base layer; and a heat pipe in contact with the metal layer.