Light Scattering Structure for Display Color Shift Reduction
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Solution Overview
Problem
Conventional organic light emitting display devices experience a color shift phenomenon due to strong linearity of light emission, leading to image quality deterioration when viewed obliquely, as superimposed lights result in image quality degradation.
Innovation Solution
Incorporating a light scattering structure with recesses or protrusions on a second substrate, which scatters light generated in the display structure, thereby reducing the linearity of light emission and minimizing color shift, and using a transparent member with a different refractive index to enhance light scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light scattering structure is added to scatter light and reduce color shift, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent employs a light scattering structure with micropores or rough surfaces on the substrate or encapsulation layer. This porous/scattered structure diffuses light in multiple directions, reducing the linearity of light emission and preventing color shift when viewed obliquely. The light scattering effect is achieved through the physical morphology of the material rather than adding complex optical components, thus improving image quality while controlling device complexity.
2Manufacturing precision
If conventional light scattering methods are used, then color shift is reduced, but additional components increase device complexity and manufacturing cost
Solution Approach 1:
The patent integrates the light scattering function into existing components such as the substrate or encapsulation layer that already serve structural and protective functions. By making these existing components multi-functional (providing both structural support and light scattering), the patent avoids adding separate light scattering components, thereby reducing device complexity and manufacturing cost while still achieving color shift reduction.
Solution Approach 2:
The patent combines the light scattering function with the substrate or encapsulation layer, merging multiple functions into a single integrated component. Instead of having separate light scattering elements, the scattering functionality is merged into the existing structural layers through surface modification or material selection, simplifying the overall device structure and reducing the number of manufacturing steps.
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 light scattering structure effectively scatters superimposed light, improving image quality by reducing color shift and enhancing display device performance without increasing weight or manufacturing costs.
Implementation Method 1
a light scattering structure in the display region, the light scattering structure being configured to scatter light generated in the display structure
Implementation Method 2
a transparent member substantially buried in the recess... a refractive index of the transparent member may be different from a refractive index of the second substrate
Data Source
AI summary
A display device includes a first substrate having a display region and a peripheral region, a display structure in the display region, a second substrate parallel to the first substrate, the second substrate including a light scattering structure in the display region, the light scattering structure being configured to scatter light generated in the display structure, and a shielding member adjacent to the light scattering structure.