Display Panel Signal-Line Shielding for Under-Screen Imaging
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Solution Overview
Problem
Existing display technologies with under-screen cameras face challenges in maintaining light transmittance and imaging quality due to diffraction and interference caused by gaps between signal lines, leading to glare and reduced visibility.
Innovation Solution
A display panel design incorporating a light shielding portion on the base substrate that covers the gaps between signal lines, reducing diffraction and interference, and ensuring higher light transmittance in the imaging region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If gaps are formed between signal lines, then light transmittance is improved, but diffraction and interference occur causing glare and reduced imaging quality
Solution Approach 1:
A light shielding portion is introduced as an intermediary element positioned between the gaps of signal lines and the imaging module. This light shielding portion blocks light passing through the gaps, preventing diffraction and interference patterns from forming on the imaging sensor, thereby eliminating glare while preserving the necessary light transmission paths for normal display operation
Solution Approach 2:
The light shielding portion is selectively positioned only in regions where gaps between signal lines would cause imaging problems, rather than uniformly shielding the entire display area. This localized approach maintains high light transmittance in pixel regions while providing targeted glare prevention in signal line gap regions, optimizing both display brightness and imaging quality
2Measurement precision
If signal lines are arranged closely to increase pixel density, then screen resolution is improved, but gaps between signal lines cause more diffraction and interference
Solution Approach 1:
The light shielding portion serves as a mediator that decouples the relationship between signal line spacing and imaging quality. By blocking light from the gaps, it allows signal lines to be arranged closely for high pixel density without the gaps causing diffraction and interference patterns on the imaging sensor
Solution Approach 2:
The display area is segmented into functional zones: pixel emission regions and signal line gap regions. The light shielding portion is specifically placed in the signal line gap regions, allowing the pixel regions to maintain high density arrangements while the shielded regions prevent optical interference from reaching the imaging module
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 shielding portion effectively eliminates glare and improves imaging quality by minimizing brightness changes, enhancing visibility and image clarity in the under-screen camera solution.
Implementation Method 1
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 plurality of gaps
Implementation Method 2
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 plurality of gaps
Implementation Method 3
The light shielding portion effectively eliminates glare and improves imaging quality by minimizing brightness changes
Data Source
AI summary
A display panel is provided, including a base substrate, pixel units, signal lines, and a light shielding portion. Each pixel unit includes a light-emitting element and a pixel driving circuit. The pixel units include first pixel units in a first display region of the display panel and second pixel units in a second display region of the display panel. The signal lines are electrically connected to pixel driving circuits of the second pixel units respectively. Orthographic projections of at least two of the signal lines on the base substrate are spaced apart from each other by a gap, and an orthographic projection of the light shielding portion on the base substrate covers an orthographic projection of the gap on the base substrate and orthographic projections of the second pixel units. The light shielding portion includes first light shielding sub-portions arranged in an array along row and column directions.