Display Device Color Conversion Layer Stacking
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Solution Overview
Problem
Current display devices, such as LCDs and AMOLEDs, face challenges with mediocre response time, short lifespan, and limited flexibility, while increasing pixel integration and density is difficult due to the size of semiconductor light emitting devices and narrow pixel intervals.
Innovation Solution
A display device structure incorporating a substrate with semiconductor light emitting devices and a color conversion part that includes a porous layer, wavelength conversion layer, and reflective layer, where the wavelength conversion layer is between the porous layer and reflective layer, and the porous layer is formed of an electro-polishable material, with an adhesive member allowing physical coupling to the semiconductor light emitting device, and a reflective electrode between the conductivity type electrodes to maximize light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pixel integration or pixel density is increased, then display resolution is improved, but it becomes difficult to realize color due to the size of semiconductor light emitting devices and narrow pixel intervals
Solution Approach 1:
The color conversion function is segmented from the semiconductor light emitting device and integrated into a separate color conversion part. This allows the light emitting device to be minimized in size for high pixel density while the color conversion part handles color realization independently, resolving the conflict between small device size and color accuracy.
Solution Approach 2:
The patent transitions from planar color conversion to a three-dimensional stacked structure where the color conversion part is vertically integrated on top of the semiconductor light emitting device. This vertical integration allows color conversion functionality to be added without increasing lateral pixel size, enabling high pixel density while maintaining color accuracy.
2Length of moving object
If the size of semiconductor light emitting devices is reduced, then pixel density is improved, but color conversion becomes difficult due to narrow space between pixels
Solution Approach 1:
The color conversion part is positioned in the vertical dimension above the semiconductor light emitting device rather than in the lateral plane. This vertical stacking approach allows color conversion to occur in the Z-direction, eliminating space constraints in the X-Y plane and enabling high pixel density with adequate color conversion functionality.
Solution Approach 2:
The color conversion part is nested vertically on top of the semiconductor light emitting device, creating a compact stacked structure. This nesting allows the color conversion functionality to be integrated within the vertical space above each pixel, maintaining color conversion capability while minimizing lateral footprint for high pixel density.
3Quantity of substance
If pixel intervals are narrowed, then pixel density is improved, but light mixing between adjacent pixels increases
Solution Approach 1:
The color conversion part is segmented as a separate integrated component with defined boundaries for each pixel. This segmentation creates optical isolation between adjacent pixels, preventing light mixing while allowing narrow pixel intervals for high pixel density.
Solution Approach 2:
By moving color conversion to the vertical dimension, the patent creates a layered structure where each pixel's light path is confined to its vertical column. This prevents lateral light mixing between adjacent pixels even when pixel intervals are narrowed, as the color conversion occurs above each pixel rather than beside it.
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 enables high pixel density and narrow pixel spacing, allowing for efficient color conversion and maximizing color conversion efficiency by preventing light loss and mixing, thus enhancing display performance.
Implementation Method 1
a wavelength conversion layer; and a reflective layer, wherein the wavelength conversion layer is disposed between the porous layer and the reflective layer
Implementation Method 2
a porous layer; a wavelength conversion layer
Implementation Method 3
a reflective layer, wherein the wavelength conversion layer is disposed between the porous layer and the reflective layer
Implementation Method 4
the porous layer is formed of an electro-polishable porous terminal
Data Source
AI summary
The present invention relates to a display device, and particularly, to a display device using a semiconductor light emitting device. The display device includes a substrate including an electrode, a plurality of light emitting devices assembled on the substrate, and a color conversion part stacked on the plurality of semiconductor light emitting devices and converting a color. Specifically, the color conversion part includes: a porous layer, a wavelength conversion layer, and a reflective layer, wherein the wavelength conversion layer is disposed between the porous layer and the reflective layer, and the porous layer is formed of an electro-polishable porous terminal. A surface of the reflective layer includes a first region and a second region surrounded by the first region, the second region has roughness higher than that of the first region, and a plurality of first protrusions are disposed in the second region.