Electro-optical Device Shielding Layer Signal Interference
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Solution Overview
Problem
Existing electro-optical devices face limitations in miniaturization due to the intrinsic constraints of signal line layout, leading to increased interference and noise in image signals, particularly with high-frequency signals, which hampers the ability to produce high-quality images.
Innovation Solution
The electro-optical device employs a substrate with overlapping signal lines in multiple conductive layers, separated by interlayer insulating layers, and includes a shielding layer to reduce electrical interference, allowing for a more compact design and improved image quality by minimizing noise from high-frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are patterned on a single plane to narrow gaps between adjacent lines, then the area required for signal line layout is reduced, but interference between different kinds of signal increases due to narrower gaps
Solution Approach 1:
The patent transitions from planar signal line arrangement to three-dimensional stacked arrangement using multiple conductive layers. Signal lines that would otherwise be adjacent on a single plane are separated into different layers, reducing electromagnetic interference while maintaining compact layout. The shielding layer is inserted between conductive layers to further suppress interference between stacked signal lines.
Solution Approach 2:
A shielding layer is introduced as an intermediary element between conductive layers containing signal lines. This shielding layer acts as a mediator to block electromagnetic interference between adjacent signal lines in different layers, allowing compact stacking while maintaining signal quality.
2Volume of moving object
If the electro-optical device is miniaturized, then the device size is reduced, but the gap between signal lines becomes narrower causing increased interference and noise
Solution Approach 1:
The patent uses multiple conductive layers stacked in the vertical direction to accommodate signal lines, allowing device miniaturization in the planar direction while maintaining adequate spacing between signal lines through vertical separation. This enables compact device size without sacrificing signal line spacing.
Solution Approach 2:
A shielding layer is positioned between conductive layers to act as a noise barrier, preventing high-frequency signals from interfering with image signals even when device dimensions are reduced. This allows miniaturization while maintaining signal quality.
3Object-affected harmful factors
If signal lines are arranged in multiple conductive layers with interlayer insulating layers, then the device complexity increases, but the ability to suppress interference and reduce noise is improved
Solution Approach 1:
The patent organizes signal lines in multiple conductive layers stacked vertically, which systematically manages interference by separating different signal types in the vertical dimension. This layered approach provides a structured method to handle complexity while achieving interference suppression.
Solution Approach 2:
A shielding layer is strategically positioned between conductive layers to provide targeted interference suppression. This intermediary structure selectively blocks noise pathways without requiring complete restructuring of all signal lines, thereby managing complexity efficiently.
4Area of stationary object
If the peripheral region is reduced to increase pixel region, then the substrate size is reduced, but the space for signal line routing becomes more constrained
Solution Approach 1:
The patent routes signal lines through multiple vertical layers, allowing compact peripheral region design while providing sufficient routing space in the vertical dimension. This enables larger pixel regions without compromising signal line routing capabilities.
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
This approach enables the reduction of the device's size while maintaining high-quality image display by effectively suppressing noise and allowing for a larger pixel region, thus overcoming the limitations of traditional signal line layouts.
Implementation Method 1
a shielding layer that is provided between layers where the plurality of signal lines overlap each other, so as to overlap the plurality of signal lines
Data Source
AI summary
An electro-optical device includes: a substrate; a plurality of pixels provided in a pixel region on the substrate; peripheral circuits that are provided in a peripheral region surrounding the pixel region, the peripheral circuits being for controlling the plurality of pixels; a plurality of signal lines that supply signals for controlling the peripheral circuits, that at least partially overlap each other in the peripheral region, and that are formed in a plurality of different conductive layers with interlayer insulating layers interposed therebetween; and a shielding layer that is provided between layers where the plurality of signal lines overlap each other, so as to overlap the plurality of signal lines.