Display Signal Wiring Layout With Shield Lines for Phase Expansion
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Solution Overview
Problem
As pixel pitch decreases in electro-optical devices, the increased driving frequency leads to a short sampling time, deteriorating sampling capability and potentially increasing production costs, while existing phase expansion techniques complicate wiring and increase noise due to adjacent signal lines.
Innovation Solution
The electro-optical device employs a phase expansion method with m×n signal wiring lines grouped into groups, each with extended portions, and a shield line placed between adjacent groups to minimize noise interference, allowing efficient driving control and reducing electromagnetic noise effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase expansion is used to control switching elements, then high-resolution image display is achieved, but electromagnetic noise between adjacent signal lines increases
Solution Approach 1:
A shield line is introduced as an intermediary element between adjacent signal wiring lines to block electromagnetic noise. The shield line acts as a mediator that prevents direct electromagnetic interference between signal lines while allowing the phase expansion technique to maintain high-resolution image display capability.
Solution Approach 2:
The harmful electromagnetic noise is extracted and isolated from the signal transmission path by introducing a dedicated shield line. This separates the noise-blocking function from the signal transmission function, allowing each to be optimized independently.
2Length of moving object
If pixel pitch is reduced to achieve miniaturization, then high-resolution display is enabled, but sampling time becomes short and sampling capability deteriorates
Solution Approach 1:
The patent dynamically adjusts the timing and control of switching elements to accommodate the reduced pixel pitch. By optimizing the switching timing and using shield lines to maintain signal integrity, the system maintains reliable sampling capability despite the reduced pixel pitch and correspondingly shorter sampling time.
3Manufacturing precision
If more signal wiring lines are added for phase expansion, then driving control precision is improved, but wiring complexity and noise interference increase
Solution Approach 1:
The signal wiring lines are segmented and organized into groups with shield lines placed between adjacent groups. This segmentation reduces the complexity of managing multiple signal lines by creating structured zones, while still maintaining the precision required for phase expansion driving control.
Solution Approach 2:
Shield lines are introduced as intermediary elements between signal wiring lines to manage electromagnetic interference. This adds a layer of complexity management that allows precise driving control to be maintained without proportionally increasing overall wiring complexity.
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 configuration enables high-resolution image display with reduced noise interference, maintaining high image quality while minimizing the complexity and cost of the device configuration.
Implementation Method 1
a shield line which is formed between two adjacent groups of signal wiring lines for each data sequence along the signal wiring line in a portion where the signal wiring lines extend
Data Source
AI summary
An electro-optical device includes a display unit that has a plurality of switching elements provided at intersections of a plurality of scanning lines and a plurality of data lines and that drives the plurality of switching elements based on image signals supplied to the plurality of data lines so as to display images, a driving unit that controls driving of the display unit through a phase expansion so as to drive the plurality of switching elements for predetermined blocks, m×n signal wiring lines that transmit image signals, the image signals being divided into m (where m is a natural number of 2 or more) parallel data sequences and each of the data sequences including n (where n is a natural number of m or less) image signals, and that have extended portions such that the m×n signal wiring lines are grouped into a plurality of groups of signal wiring lines, each of the groups including n signal wiring lines for each data sequence on a substrate, and such that the plurality of groups of signal wiring lines for each data sequence are grouped, and a shield line that is formed between two adjacent groups of signal wiring lines for each data sequence along the signal wiring lines in a portion where the signal wiring lines extend.