Display Substrate Shield Section for Signal Noise Reduction
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Solution Overview
Problem
Conventional circuit boards in display devices face signal blunting due to external noise interference, especially when the device is high-definition or operates at high speeds, affecting signal transmission from a flexible substrate to a drive IC.
Innovation Solution
A substrate for display devices is designed with a shield section kept at a constant potential, overlapping wires and constant-potential wires via an insulating film to reduce noise interference, ensuring stable signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the circuit board is made higher in definition or the drive IC is driven at a high speed, then the display quality and operation speed are improved, but the signal is easily affected by external noise causing signal blunting
Solution Approach 1:
A shield wire is introduced as an intermediary element between the signal wire and external noise sources. The shield wire acts as a mediator that intercepts and redirects electromagnetic interference away from the signal transmission path, thereby protecting high-speed signals from noise contamination while maintaining operation speed
Solution Approach 2:
The patent converts the harmful electromagnetic field from external noise sources into a beneficial shielding effect. By positioning the shield wire to overlap with the signal wire, the external electromagnetic interference is captured and redirected to ground through the shield wire's connection to the common potential layer, transforming the harmful noise into a controlled reference potential
2Reliability
If a shield section is added to protect signals from noise, then signal transmission quality is improved, but device complexity increases
Solution Approach 1:
The shield wire is merged with the existing common potential layer through direct connection. This integration allows the shield wire to utilize the already-established ground reference without requiring a separate complex grounding system, thereby reducing overall device complexity while maintaining shielding effectiveness
Solution Approach 2:
The common potential layer serves multiple functions: it acts as both the reference potential for the circuit and the grounding path for the shield wire. This multi-functionality eliminates the need for dedicated shielding structures and simplifies the overall device architecture while providing effective noise protection
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 signal blunting and improves display quality by shielding signals from external noise, allowing for higher definition and faster operation without signal degradation.
Implementation Method 1
a shield section (25), disposed to overlap the wire (23) via a first insulating film (27) on the glass substrate (12GS), that is kept at a constant potential
Data Source
AI summary
A substrate for a display includes a substrate section on which a flexible substrate and a driver are mounted, a flexible substrate side terminal area, disposed in a mounting area on the substrate section for the flexible substrate, to which a signal is inputted from the flexible substrate, a driver side terminal area, disposed in a mounting area on the substrate section for the driver, through which at least a part of the signal is inputted and outputted to the driver, a wire, disposed to extend from the mounting area on the substrate section for the flexible substrate to the mounting area for the driver and connected to the flexible substrate side terminal area and the driver side terminal area, through which the signal is transmitted, and a shield section, disposed to overlap the wire via an insulating film on the substrate section, that is kept at a constant potential.