LED Substrate Reference Line Layout for Driving Signal Noise Reduction
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Solution Overview
Problem
Noise interference on driving lines in LED light-emitting substrates affects the luminous quality, as existing technologies fail to effectively mitigate signal interferences between different driving signals.
Innovation Solution
The light-emitting substrate incorporates a configuration with multiple reference power lines, capacitors, and strategically arranged driving lines to reduce noise by electrically connecting reference power lines between driving lines and using capacitors to stabilize power supply voltages, thereby minimizing signal interferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple driving lines are arranged closely to increase signal channel density, then device integration is improved, but noise interference between adjacent driving lines increases
Solution Approach 1:
The patent introduces reference power lines as intermediary elements positioned between adjacent driving lines (such as clock signal lines and driving data lines). These reference power lines act as mediators that reduce electromagnetic coupling and noise interference between the driving lines, enabling higher signal channel density without compromising signal quality.
Solution Approach 2:
The patent extracts the noise interference problem by separating the reference power supply function from the driving signal function. By dedicating specific reference power lines solely for providing stable reference voltages and isolating them from signal transmission functions, the design reduces the harmful effects of noise while maintaining high integration.
2Reliability
If reference power lines are added between driving lines to reduce noise, then signal stability is improved, but device complexity increases
Solution Approach 1:
The reference power lines serve multiple functions simultaneously: they provide reference supply voltages to chips, act as shielding elements between driving lines to reduce noise, and establish stable voltage benchmarks for signal regulation. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the reference power supply network with the signal transmission network by integrating reference power lines into the same substrate structure as driving lines. This unified design approach allows noise reduction functionality to be incorporated without requiring entirely separate systems, thus controlling overall device complexity.
3Object-affected harmful factors
If capacitors are added to stabilize power supply voltages, then noise reduction is improved, but manufacturing complexity increases
Solution Approach 1:
The capacitors are nested within the existing multi-layer substrate structure, utilizing available space between functional layers. By integrating capacitors into the nested layer configuration rather than adding external components, the manufacturing process complexity is minimized while still achieving power supply stabilization and noise reduction.
Data Source
AI summary
A light-emitting substrate comprises a plurality of signal channels arranged in sequence along a row direction. Each signal channel comprises a plurality of control areas arranged along a column direction, and each control area comprises at least one light area controlled by a same chip. In each signal channel, the light-emitting substrate is provided with a first driving line, a second driving line, and a plurality of reference power lines. The first driving line and the second driving line are respectively used for providing different driving signals to the chip. The reference power line is used for providing a reference power supply voltage to the chip. The reference power lines in a same signal channel are electrically connected, and at least one reference power line is provided between the first driving line and the second driving line.