Under-Display Emission Layer Layout for White Angle Stability
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Solution Overview
Problem
Current display devices face challenges in achieving improved display quality, particularly in regions with electronic modules such as cameras, where the transmittance and resolution vary significantly, affecting the overall viewing experience and functionality.
Innovation Solution
The display device incorporates a display panel with distinct regions of varying transmittance and resolution, featuring emission layers with specific light-emitting portions and insulating layers, and metal patterns to optimize light emission and transmission, enhancing the white angle difference characteristic and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If emission layers are arranged in a single direction, then the structure is simple, but the white angle difference characteristic deteriorates
Solution Approach 1:
The patent applies asymmetry by arranging light-emitting portions of emission layers in opposite directions (first direction and second direction) rather than a uniform single direction. This asymmetric arrangement compensates for color coordinate changes at different viewing angles, improving the white angle difference characteristic while maintaining reasonable structural complexity.
Solution Approach 2:
The patent transitions from a one-dimensional linear arrangement of light-emitting portions to a two-dimensional arrangement by introducing opposite directions (first and second directions). This dimensional expansion allows the emission layers to address color coordinate variations from multiple viewing angles simultaneously, improving white angle difference performance.
2Ease of manufacture
If the display panel has uniform transmittance across all regions, then the manufacturing is simple, but the display quality in regions with electronic modules deteriorates
Solution Approach 1:
The patent applies local quality by creating a display panel with non-uniform transmittance characteristics - a first region with first transmittance and a second region with second transmittance. This allows optimization of display quality in specific regions (particularly where electronic modules are located) while maintaining overall manufacturing feasibility through defined regional characteristics.
3Device complexity
If the light-emitting portions are arranged in a single direction, then the device structure is simple, but the color coordinate changes with viewing angles increase
Solution Approach 1:
The patent uses asymmetry by positioning light-emitting portions to extend in opposite directions rather than a single direction. This asymmetric configuration balances color coordinate changes from different viewing angles, improving color stability without requiring overly complex multi-directional arrangements.
Solution Approach 2:
The patent improves color coordinate stability by transitioning from unidirectional to bidirectional arrangement of light-emitting portions. This two-dimensional spatial distribution of emission sources compensates for viewing angle-dependent color shifts, achieving better color consistency across different observation angles.
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 improves the display quality by adjusting the thickness and arrangement of layers under the light-emitting portions, reducing color coordinate changes with viewing angles and enhancing the overall performance of the display device.
Implementation Method 1
a first emission layer in the first sub-region; and a second emission layer in the first sub-region and spaced apart from the first emission layer. The first emission layer has a first light-emitting portion and a second light-emitting portion adjacent to the first light-emitting portion in a first direction, and the second emission layer has a third light-emitting portion and a fourth light-emitting portion adjacent to the third light-emitting portion in the first direction.
Data Source
AI summary
A display device includes a display panel having first and second regions with the second region having a higher resolution than the first region and an electronic module under the first region. The display panel includes first and second emission layers in a first sub-region of the first region with the second emission layer being spaced apart from the first emission layer. The first emission layer has a first light-emitting portion and a second light-emitting portion adjacent to the first light-emitting portion in a first direction, and the second emission layer has a third light-emitting portion and a fourth light-emitting portion adjacent to the third light-emitting portion in the first direction. The first light-emitting portion is inclined from the second light-emitting portion toward a lower surface of the display panel, and the fourth light-emitting portion is inclined from the third light-emitting portion toward an upper surface of the display panel.