Display Substrate NFC Antenna Layout for Higher Aperture Ratio
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Solution Overview
Problem
The integration of NFC antennas with display substrates in electronic devices increases manufacturing costs and complicates the manufacturing process due to the complex structure of display substrates, potentially affecting the display function.
Innovation Solution
A display substrate design that integrates an NFC antenna network within the display substrate, comprising a base substrate, pixel driving circuit layer, and antenna layer, with specific configurations to ensure compatibility and minimize overlap with other components, allowing for flexible formation during the display substrate manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If NFC antenna is integrated with display substrate, then manufacturing cost is reduced and aperture ratio is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the NFC antenna structure with the display substrate by forming antenna lines in the same metal layers (first metal layer and second metal layer) that constitute the pixel driving circuit. The antenna lines share the same manufacturing process steps (sputtering, patterning, etching) as the circuit lines, eliminating the need for separate antenna fabrication and reducing overall manufacturing complexity despite integrating multiple functions.
Solution Approach 2:
The metal layers in the display substrate serve dual purposes: they form both the pixel driving circuit lines (gate lines, source lines, drain lines) and the NFC antenna lines. This multi-functionality allows a single manufacturing process to create both display and communication functions, reducing the need for additional manufacturing steps and materials.
2Area of stationary object
If NFC antenna network is integrated into display substrate, then aperture ratio is improved, but display function may be affected due to complex structure
Solution Approach 1:
The antenna network is segmented into multiple independent antenna lines (first antenna lines in first metal layer, second antenna lines in second metal layer) that are distributed across different regions of the display substrate. This segmentation allows the antenna function to be implemented without creating large continuous structures that would interfere with display pixels, thereby maintaining high aperture ratio while ensuring display reliability.
Solution Approach 2:
The patent utilizes the vertical dimension by forming antenna lines in multiple stacked metal layers (first metal layer and second metal layer at different heights). This three-dimensional arrangement allows antenna lines to coexist with display pixels in the planar view without overlapping conflicts, maintaining both high aperture ratio and display function reliability.
Data Source
AI summary
A display substrate, a manufacturing method thereof and a display device. The display substrate includes a base substrate, a pixel driving circuit layer and an antenna layer, wherein the pixel driving circuit layer is arranged on the base substrate and includes a thin film transistor and a plurality of signal lines, and the antenna layer is arranged on a side of the pixel driving circuit layer far away from the pixel driving circuit layer and includes a first antenna arranging region including a first antenna network formed by a plurality of first antenna lines.