Display Panel Metal Wire Stacking for Fingerprint Light Transmittance
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Solution Overview
Problem
The light transmittance performance of display panels is relatively poor, resulting in weak light signals received by fingerprint recognition units, which affects the strength of fingerprint recognition signals.
Innovation Solution
The display panel incorporates a design with multiple layers of metal wires, where vertical projections of first type and second type metal wires are overlapped in specific regions, reducing the area obscured by metal wires and enhancing light transmittance, allowing more light to be received by the fingerprint recognition unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional metal wire layout is used in display panel, then electrical connectivity is ensured, but light transmittance performance deteriorates causing weak fingerprint recognition signals
Solution Approach 1:
The patent transitions from a two-dimensional planar metal wire layout to a three-dimensional stacked architecture. Multiple metal wire layers are vertically arranged with overlapping projections in gap regions, utilizing the third dimension (vertical stacking) to reduce the effective area occupied by metal wires in the light transmission path, thereby improving light transmittance while maintaining electrical connectivity.
Solution Approach 2:
The patent implements a nested structure where multiple metal wire layers are positioned within the same vertical projection space. The first and second metal wires are arranged in different layers with their projections overlapping in the gap region, creating a nested configuration that minimizes the total area blocked by metal wires, thus enhancing light transmission to the fingerprint recognition unit.
2Adaptability or versatility
If more metal wires are added to ensure electrical connectivity, then device functionality is improved, but the area obscured by metal wires increases reducing light transmittance
Solution Approach 1:
The patent resolves the contradiction by moving metal wire routing into the vertical dimension through multi-layer stacking. This allows increased device functionality with additional metal wires while maintaining good light transmittance, as the wires are distributed across multiple layers rather than occupying horizontal space in a single plane.
Solution Approach 2:
The patent applies different spatial arrangements to different regions: in gap regions where light transmission is critical, metal wires from different layers are overlapped to minimize coverage area; in active circuit regions, full connectivity is provided. This localized optimization balances functionality and light transmittance requirements.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a display assembly and a fingerprint recognition assembly. The display assembly includes a base substrate, a plurality of pixel driving circuit units disposed on one side of the base substrate and at least two kinds of metal wires extending along a first direction, the plurality of pixel driving circuit units are arranged in a matrix along the first direction and a second direction, and a first gap region is formed between adjacent two of the plurality of pixel driving circuit units in the first direction. The display panel provided by the present disclosure provides the at least two kinds of metal wires to include a plurality of first type metal wires and a plurality of second type metal wires.