Light Emitting Display Spacer Heat Dissipation Design
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Solution Overview
Problem
Conventional light emitting displays face heat-related issues due to limited heat dissipation capacity, particularly in active matrix type devices, where the center part generates higher temperatures, leading to degradation from internal heat, oxygen, and moisture exposure.
Innovation Solution
The solution involves a light emitting display design with larger spacers at the central part of the pixel circuit and smaller spacers at the peripheral part, where the spacers protrude higher than the light emitting part, and are made of high thermal conductivity materials, with a metal layer and getter unit on the second electrode in contact with the shield cap, and optionally a heat sink or cooling fan for enhanced heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat sink is adhered to the outer surface of the shield cap for heat dissipation, then heat discharge capability is improved, but the heat dissipation capacity remains very limited and cannot effectively solve the heat-related degradation problems
Solution Approach 1:
The invention divides the heat dissipation function into multiple segments: the shield cap itself acts as a heat dissipation structure, additional heat sinks are attached to the shield cap, and spacers are strategically positioned to facilitate heat flow. This segmentation allows heat to be dissipated through multiple pathways simultaneously, significantly improving overall heat dissipation capacity beyond what a single heat sink could achieve.
Solution Approach 2:
The shield cap is designed to serve multiple functions: it provides sealing protection against oxygen and moisture, structural support for the display device, and acts as a heat dissipation component. By making the shield cap multi-functional, the invention eliminates the need for separate dedicated heat dissipation structures while improving overall heat management effectiveness.
2Illumination intensity
If the light emitting area is increased to improve display performance, then luminous output is improved, but heat generation in the center part increases and causes higher temperature than the outer part
Solution Approach 1:
The invention applies different heat dissipation strategies to different regions of the display. The shield cap is designed with specific geometric features that enhance heat dissipation from the center region where heat generation is highest. Additional heat sinks are positioned to target hot spots, and spacers are strategically located to facilitate heat flow from the center toward the edges, creating a localized heat management approach that maintains temperature distribution uniformity across the entire display area.
3Strength
If spacers are positioned within the pixel circuit part to support the shield cap, then structural support is improved, but the spacers occupy space within the pixel circuit area
Solution Approach 1:
The invention merges the support function with the heat dissipation function. The spacers that provide structural support for the shield cap are designed to also act as heat dissipation elements. By combining these two functions into a single component, the invention eliminates the need for separate support structures that would occupy additional pixel circuit area, while still providing adequate structural support and 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
This design effectively discharges heat generated in the pixel circuit, reducing the risk of degradation and improving the reliability of light emitting displays by maintaining uniform temperature distribution and preventing heat-related deteriorations such as color changes or luminance reduction.
Implementation Method 1
a spacer positioned within the pixel circuit part, and formed on the substrate to protrude higher than the light emitting part
Implementation Method 2
a heat sink 180 is adhered to an outer surface of a shield cap 160 by adhesive 185 for preventing degradation of the display 100 by heat
Implementation Method 3
a cooling fan may be formed at the outer side of the shield cap
Implementation Method 4
An getter 150 is inserted into the display 110 for absorption from moisture and/or oxygen
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention provides a light emitting display with excellent reliability by preventing degradation by heat such as color changes or luminance reduction, through uniform and quick discharge of heat generated internally by the use of banks.