Semiconductor Display Partition Structure for Flexible Layer Adhesion
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Solution Overview
Problem
The existing display technologies, such as LCDs and AMOLEDs, face challenges with slow response time, limited flexibility, short lifespan, and poor adhesion between the wavelength conversion layer and color filter due to differences in physical properties, which affect the structural reliability and viewing angle of flexible displays.
Innovation Solution
A display apparatus with a new partition wall structure that adjusts the height of light transmitting materials to enhance adhesive force between the wavelength conversion layer and color filter, incorporating a resin that overlaps with the adhesive layer and forms a protrusion arrangement with recess grooves to reinforce coupling, and uses a cylindrical shape to reduce gaps and improve luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a wavelength conversion layer and color filter are used in a flexible display, then the display can achieve full-color capability, but the adhesion between layers deteriorates due to differences in physical properties
Solution Approach 1:
An adhesive layer is introduced as an intermediary between the wavelength conversion layer and color filter to improve bonding. The adhesive layer has specific physical properties (viscosity, curing characteristics) that enable it to bridge the mismatch between the wavelength conversion layer and color filter, thereby resolving the adhesion problem while maintaining full-color display capability
Solution Approach 2:
The physical parameters of the wavelength conversion layer are modified by controlling the height of light transmitting materials and the composition of the wavelength conversion layer itself. These parameter changes enable the wavelength conversion layer to better match the color filter in terms of physical properties, thereby improving adhesion while maintaining full-color capability
2Productivity
If the wavelength conversion layer is made thicker to improve light conversion, then color conversion efficiency is improved, but structural reliability deteriorates due to increased separation risk
Solution Approach 1:
The wavelength conversion layer is segmented into multiple thinner layers rather than using a single thick layer. This segmentation maintains the total light conversion efficiency while reducing the overall thickness, thereby improving structural reliability and reducing the risk of separation between the wavelength conversion layer and color filter
Solution Approach 2:
Instead of increasing thickness in the vertical dimension to improve light conversion, the invention optimizes the horizontal distribution and composition of light transmitting materials. This dimensional shift allows maintaining conversion efficiency while reducing vertical thickness, thereby improving structural reliability
3Illumination intensity
If partition walls are made thinner to increase phosphor filling space, then luminance is improved, but adhesion force between layers deteriorates
Solution Approach 1:
The partition walls are designed with non-uniform properties: they are thin in regions where phosphor filling is needed to maximize luminance, but have localized thickening or reinforcing structures at critical adhesion points. This local quality variation allows simultaneous optimization of luminance and adhesion force
Solution Approach 2:
The partition walls are constructed as composite structures combining different materials with complementary properties. One material provides mechanical strength for adhesion, while another material allows for phosphor filling and light transmission. This composite approach resolves the contradiction between thin partition walls for luminance and sufficient adhesion force
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 secures adhesion reliability, mitigates separation due to bending or deterioration, and enhances viewing angle and luminance by reducing gaps between the color filter and wavelength conversion layer, thereby improving the structural reliability and performance of flexible displays.
Implementation Method 1
a wavelength conversion layer disposed to cover the plurality of LEDs, wherein the wavelength conversion layer comprises a plurality of phosphor layers that convert a wavelength of light
Implementation Method 2
an adhesive layer disposed between the color filter and the wavelength conversion layer
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present invention relates to a display apparatus and, particularly, to a display apparatus using a semiconductor light emitting device. A display apparatus according to the present invention comprises: a substrate including a wiring electrode formed therein; a plurality of semiconductor light emitting devices electrically connected to the wiring electrode; a plurality of phosphor layers for converting wavelengths of light; a plurality of partition parts disposed among the plurality of phosphor layers; a wavelength converting layer disposed to cover the plurality of semiconductor light emitting devices; a color filter disposed to cover the wavelength converting layer; and an adhesive layer disposed between the color filter and the wavelength converting layer, wherein at least one of the plurality of partition parts includes metal thin films and a light transmitting material disposed in a space between the metal thin films, and the adhesive layer is formed to fill at least a part of the space between the metal thin films.