Display Light Guide Layer Cavities for Color Purity
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Solution Overview
Problem
Display devices with light converters can experience a color mixture phenomenon when light is not properly directed, leading to inefficiencies in color purity and light efficiency.
Innovation Solution
A display device design featuring a light guide layer with defined cavities and insulation layers to direct light from pixels to corresponding light converters, preventing light from being provided to adjacent converters and enhancing light efficiency by using a support insulation layer with a higher refractive index than the cover insulation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light converters are disposed on pixels to convert light wavelengths, then color purity is improved, but color mixture phenomenon occurs when light is not properly directed to corresponding converters
Solution Approach 1:
The light guide layer is divided into multiple cavities, with each cavity positioned to correspond to a specific pixel. This segmentation prevents light from one pixel from reaching adjacent light converters, thereby eliminating color mixture while maintaining color purity enhancement
Solution Approach 2:
The light guide layer acts as an intermediary structure between the pixel and the light converter. By introducing this intermediate layer with cavity structures, light transmission is controlled and directed precisely to the intended converter, preventing harmful color mixture effects
2Loss of energy
If light is provided to adjacent light converters, then color mixture occurs, but light efficiency is reduced
Solution Approach 1:
The light guide layer is segmented into multiple cavities, with each cavity positioned to correspond to a specific pixel. This segmentation prevents light from one pixel from reaching adjacent light converters, thereby eliminating color mixture while maintaining color purity enhancement
Solution Approach 2:
The cavity structure in the light guide layer converts potential harmful light leakage into beneficial directed light transmission. By designing cavities that guide light precisely to corresponding converters, the structure transforms what could be wasted light into useful, targeted illumination
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 prevents color mixture and improves light efficiency by ensuring light is directed correctly to the intended converters, enhancing the display's color purity and overall performance.
Implementation Method 1
enhancing light efficiency by using a support insulation layer with a higher refractive index than the cover insulation layer
Data Source
AI summary
A display device includes a substrate on which a pixel area and a non-pixel area around the pixel area are defined, an encapsulation layer disposed on the substrate, a light conversion layer including a light converter disposed on the encapsulation layer to overlap the pixel area, and a light guide layer disposed between the encapsulation layer and the light conversion layer to define a first cavity that overlaps the pixel area and a second cavity that overlaps the non-pixel area.