Display Apparatus Insulator Parts Noise Interference
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Solution Overview
Problem
In display apparatuses with touch panels, noise interference from the peripheral region affects signal detection, leading to a decrease in signal-to-noise ratio and impaired sensing performance when a finger or input tool approaches the peripheral area.
Innovation Solution
The implementation of a display apparatus design with a first substrate, a second substrate, and insulator parts with varying permittivity, where the insulator parts with lower permittivity are positioned to overlap the lead wirings in the peripheral region, reducing electrostatic capacitance and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarization plate or dielectric body is provided on the upper surface of the substrate in the peripheral region, then the display quality is improved, but the electrostatic capacitance between lead wirings and external objects increases causing noise interference
Solution Approach 1:
The patent applies different dielectric properties to different regions: high permittivity dielectric bodies are placed only in the display region to enhance display quality, while the peripheral region uses low permittivity insulator parts or air spaces to minimize noise interference. This local differentiation resolves the contradiction by optimizing each region for its specific function.
Solution Approach 2:
The patent segments the substrate surface into display region and peripheral region with distinct dielectric characteristics. The display region contains high permittivity dielectric bodies for quality enhancement, while the peripheral region uses low permittivity insulator parts or spaces, creating segmented zones with optimized properties for their respective purposes.
2Reliability
If insulator parts with high permittivity are used in the peripheral region, then the dielectric performance is improved, but the signal-to-noise ratio decreases due to increased noise transmission
Solution Approach 1:
The patent implements local quality differentiation by using high permittivity dielectric bodies exclusively in the display region where dielectric performance is critical, while employing low permittivity insulator parts in the peripheral region where noise reduction is paramount. This resolves the contradiction by matching dielectric properties to regional requirements.
Solution Approach 2:
The patent changes the permittivity parameter of insulator parts based on location: high permittivity in the display region for optimal dielectric performance, and low permittivity in the peripheral region for noise reduction. This parameter differentiation resolves the contradiction between dielectric performance and signal-to-noise ratio.
3Reliability
If lead wirings are arranged in the peripheral region for driving electrodes, then the electrical connection is improved, but the susceptibility to noise from external objects increases
Solution Approach 1:
The patent introduces low permittivity insulator parts as intermediary elements between the lead wirings in the peripheral region and external objects. These insulator parts act as mediators that reduce capacitive coupling and noise transmission, protecting the electrical connections while maintaining their functionality.
Solution Approach 2:
The patent applies different insulating properties to different spatial locations: standard insulation in the display region and enhanced low permittivity insulation in the peripheral region where lead wirings are located. This local quality optimization protects electrical connections from noise while maintaining overall system performance.
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 design enhances the signal-to-noise ratio and improves the sensing performance by minimizing noise transmission from the peripheral region, allowing for more accurate input position sensing.
Implementation Method 1
capacitance between the lead wirings arranged in the peripheral region and the finger or input tool relatively increases
Implementation Method 2
The second insulator part or the space has a permittivity lower than a permittivity of the first insulator part
Data Source
AI summary
A display apparatus includes a first substrate, a second substrate facing the first substrate, lead wirings provided on the first substrate or the second substrate and a first insulator part provided on an upper surface of the second substrate. The lead wirings are arranged in a peripheral region when seen in a plan view and the first insulator part is arranged so as to overlap a display region when seen in a plan view. Second insulator parts or spaces with a permittivity lower than a permittivity of the first insulator part are provided at sides of the first insulator part. The second insulator parts or the spaces are arranged so as to overlap the lead wirings in the peripheral region when seen in a plan view.