Display Panel Signal-Line Gap Shielding for Under-Screen Imaging
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Solution Overview
Problem
Existing display technologies face challenges in maintaining high screen-to-body ratios while ensuring adequate light transmittance and imaging quality at locations with embedded imaging modules, such as cameras, due to issues like diffraction and interference from gaps between signal lines.
Innovation Solution
A display panel design incorporating a light shielding portion on the base substrate that covers the orthographic projections of gaps between signal lines, minimizing diffraction and interference, and enhancing light transmittance in regions with embedded image sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If organic light-emitting materials are used in display panels, then color rendering is improved, but material stability deteriorates leading to performance degradation over time
Solution Approach 1:
The patent divides the light-emitting system into separate functional components: a blue light-emitting OLED layer and yellow phosphor particles (Irings) that convert blue light to yellow. This segmentation allows each component to be optimized independently - the OLED maintains stable blue emission while the phosphor handles color conversion, resolving the stability issue while preserving color rendering benefits.
Solution Approach 2:
The patent introduces a wavelength conversion layer containing yellow phosphor particles as an intermediary between the blue OLED and the final displayed image. This intermediary converts the stable blue light into full-color light, enabling the OLED to maintain material stability while achieving good color rendering through the phosphor's wavelength conversion properties.
2Reliability
If material stability is improved to prevent performance degradation, then reliability is improved, but color rendering deteriorates
Solution Approach 1:
The patent creates a composite light-emitting system combining blue OLED material with yellow phosphor particles. The OLED provides stable blue light emission, while the phosphor particles add yellow wavelength to achieve full-color rendering. This composite approach maintains material stability while achieving good color rendering that would be difficult with pure organic light-emitting materials.
3Device complexity
If display panel structure is simplified, then device complexity is reduced, but manufacturing precision deteriorates due to alignment requirements
Solution Approach 1:
The patent resolves the alignment issue by transitioning from planar positioning to three-dimensional positioning. The wavelength conversion layer is formed as a protruding structure that vertically overlaps with the OLED, eliminating the need for precise lateral alignment. This dimensional change simplifies manufacturing while maintaining structural effectiveness.
Solution Approach 2:
The patent uses a thin-film wavelength conversion layer that can be formed as a protruding structure through deposition processes. This thin film approach allows the conversion layer to be positioned vertically above the OLED without requiring complex lateral alignment mechanisms, reducing manufacturing precision requirements while maintaining the intended optical 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
The solution effectively reduces glare and improves imaging quality by reducing brightness changes and enhancing visibility, thus optimizing the under-screen camera solution for better visual experience.
Implementation Method 1
a wavelength conversion layer, which converts blue light into yellow light
Implementation Method 2
an encapsulation layer, which prevents ingress of moisture and oxygen
Data Source
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AI summary
A display panel and a display device are provided. The display panel includes: a base substrate; a plurality of pixel units arranged on the base substrate in an array, wherein each pixel unit comprises a pixel driving circuit and a light-emitting element, and the driving circuit structure is configured to drive the light-emitting element; a plurality of signal lines, electrically connected to the pixel driving circuit, respectively; and a light shielding portion on the base substrate. Orthographic projections of at least two of the signal lines on the base substrate are spaced apart by a gap, at least one of interference and diffraction is generated due to a plurality of gaps in response to that at least a part of light passes through the gaps, and an orthographic projection of the light shielding portion on the base substrate covers at least orthographic projections of the gaps on the base substrate.