Display Panel Optical Layer for Light Extraction and Sensing
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Solution Overview
Problem
Existing display technologies face challenges in enhancing user experience through improved light extraction efficiency and integrated light sensing capabilities while avoiding interference and reliability issues.
Innovation Solution
The proposed display panel incorporates a substrate with an array layer, a display layer containing light-emitting devices, an optical layer with a first optical structure aligned with the intervals between light-emitting devices, and a light-shielding member with a light pass area overlapping the optical structure, enhancing light extraction and sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional display structure is used, then the manufacturing process is simple, but the light extraction efficiency is low
Solution Approach 1:
The patent introduces an optical layer with optical structures (such as microlenses or diffraction gratings) positioned at a different spatial dimension above the light-emitting devices. This dimensional addition enables light to be extracted and redirected in multiple directions, significantly improving light extraction efficiency without complicating the base manufacturing process of the display panel itself.
Solution Approach 2:
The optical layer acts as an intermediary component between the light-emitting devices and the external environment. This intermediate layer with specialized optical structures mediates the light extraction process, enhancing efficiency by manipulating light paths through refraction, reflection, or diffraction, while remaining a separate, add-on component that does not interfere with the core display manufacturing.
2Manufacturing precision
If light-emitting devices are densely arranged, then the display resolution is high, but the intervals between devices are reduced limiting optical structure placement
Solution Approach 1:
By moving the optical structures to a vertical dimension above the light-emitting devices rather than attempting to place them in the horizontal plane between devices, the patent enables high-resolution displays to still accommodate optical enhancement structures. The optical layer operates in the Z-dimension, allowing dense XY-plane device arrangement while maintaining sufficient vertical space for optical functionality.
Solution Approach 2:
The optical layer serves multiple functions simultaneously: it extracts light from densely packed devices, redirects light to improve viewing angles, and can potentially integrate with touch sensing or other display functions. This multi-functionality allows the system to achieve high resolution without sacrificing optical performance.
3Loss of energy
If optical structures are added to improve light extraction, then the light extraction efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent segments the display system into distinct functional layers: the light-emitting device layer and the separate optical enhancement layer. This segmentation allows the optical structures to be designed, manufactured, and optimized independently, reducing overall system complexity while maintaining high light extraction efficiency. Each layer can be processed using specialized techniques appropriate to its function.
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 light extraction efficiency, enhances display quality, and integrates effective light sensing, thereby improving user experience while minimizing interference and reliability issues.
Implementation Method 1
an optical layer located on a side of the display layer away from the array layer, where the optical layer includes a first optical structure, and at least a portion of the first optical structure is arranged corresponding to intervals between the plurality of light-emitting devices
Implementation Method 2
a light-shielding member located on a side of the optical layer facing the substrate, wherein the light-shielding member includes a light pass area
Data Source
AI summary
A display panel includes a substrate; an array layer on the substrate; a display layer located on a side of the array layer away from the substrate, where the display layer includes a plurality of light-emitting devices; an optical layer located on a side of the display layer away from the array layer. The optical layer includes a first optical structure, and at least a portion of the first optical structure is arranged corresponding to intervals between the plurality of light-emitting devices; and a light-shielding member located on a side of the optical layer facing the substrate. The light-shielding member includes a light pass area, and the light pass area overlaps with the first optical structure. The first optical structure includes a transparent material, and at least portion of the first optical structure is disposed around the plurality of light-emitting devices.