Bent Display Optical Resonance Layer for Color Uniformity
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Solution Overview
Problem
Conventional display devices with bent screens face challenges in maintaining uniform color characteristics due to differences in light emission angles, leading to variations in color perception across different regions of the screen.
Innovation Solution
A display device with a substrate having a first region and a second region bent relative to each other, featuring light-emitting diodes (LEDs) with varying heights and an optical resonance layer between the pixel electrode and counter electrode, which minimizes color deviations by using materials like hole transport, hole injection, and electron injection materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the screen is bent to provide various configurations, then adaptability and versatility are improved, but color uniformity deteriorates due to differences in light emission angles across regions
Solution Approach 1:
The patent applies local quality by introducing an optical resonance layer specifically at the second region (bent region) of the substrate, while the first region (flat region) does not have this layer. This localized structural modification allows the bent region to compensate for color deviations caused by bending, thereby maintaining color uniformity across different screen regions while preserving the adaptable bent configuration.
2Stability of the object's composition
If LEDs with different heights are used in bent and flat regions, then color consistency is improved, but device complexity increases
Solution Approach 1:
The patent implements local quality by configuring LEDs in the second region (bent region) with different heights compared to LEDs in the first region (flat region). Specifically, the emission layer of LEDs in the bent region is positioned at a different height from the substrate than LEDs in the flat region. This localized structural differentiation compensates for color deviations in the bent region, achieving color consistency while minimizing complexity by only modifying the bent region rather than the entire display structure.
3Manufacturing precision
If an optical resonance layer is added to the bent region, then color deviation is minimized, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by adding the optical resonance layer only to the second region (bent region) of the substrate, while leaving the first region (flat region) without this layer. This selective placement minimizes color deviation in the bent region where it is most needed, while avoiding unnecessary manufacturing complexity in regions where it is not required, thereby optimizing the balance between manufacturing precision and device complexity.
4Stability of the object's composition
If the emission layer height varies across regions, then color perception uniformity is improved, but structural complexity increases
Solution Approach 1:
The patent implements local quality by varying the emission layer height specifically in the second region (bent region) while maintaining a consistent emission layer height in the first region (flat region). This localized height variation compensates for color perception deviations caused by bending in the second region, achieving color perception uniformity across the entire display while minimizing structural complexity by limiting modifications to only the bent region.
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 ensures that the color coordinates of light emitted from different regions of the screen are minimized, providing uniform color perception regardless of the emission angle, thereby enhancing the display's color consistency and efficiency.
Implementation Method 1
an optical resonance layer at the second region corresponding to the second LED
Implementation Method 2
an emission layer configured to emit light of a first color
Data Source
AI summary
A display device includes: a substrate comprising a first region and a second region bent relative to the first region; a plurality of first pixels at the first region, each of the first pixels comprising a first light-emitting diode (LED), the first LED comprising a pixel electrode, an emission layer for emitting light of a first color, and a counter electrode; a plurality of second pixels at the second region, each of the second pixels comprising a second LED, the second LED comprising a pixel electrode, an emission layer configured to emit the first color, and a counter electrode; and an optical resonance layer at the second region corresponding to the second LED.