Display Device Coated Layer Warpage Management
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Solution Overview
Problem
Display devices face reliability issues due to warpage caused by temperature changes, which affect their performance and lead to defects such as cracks and lifting of components.
Innovation Solution
A display device with a coated layer on its surface, featuring different emissivity and black concentration regions to manage temperature differences, reducing warpage by optimizing heat dissipation and stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of display device components is reduced, then the overall device thickness is reduced, but warpage due to stress difference from temperature change increases
Solution Approach 1:
The patent applies local quality by creating a coated layer with spatially varying black concentration across different regions of the plate. Specifically, the coated layer has higher black concentration in edge regions compared to the center region, which creates differential heat absorption characteristics that compensate for thermal stress-induced warpage in thin-component display devices
2Ease of manufacture
If components are thinned to reduce device thickness, then manufacturing progress is achieved, but temperature-induced stress differences cause warpage and performance degradation
Solution Approach 1:
The patent implements parameter changes by modifying the optical properties (black concentration) of the coated layer in different spatial regions. This parameter modification allows the plate to differentially absorb thermal radiation, creating internal stress compensation that prevents warpage and maintains display device reliability despite using thin components
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 reduces temperature differences across the device, minimizing warpage and enhancing reliability by evenly distributing temperatures, thus preventing cracks and improving overall performance.
Implementation Method 1
a coated layer on at least one surface of the plate... emissivity of the first region is different from emissivity of the second region
Implementation Method 2
black concentration of the first region is different from black concentration of the second region
Data Source
AI summary
A display device may include a plate, a display panel on the plate, at least one circuit chip connected to a side of the display panel, and a coated layer on at least one surface of the plate. The coated layer may include a first region overlapping the at least one circuit chip and a second region not overlapping the at least one circuit chip, and black concentration of the first region is different from black concentration of the second region.