Electrostatic Capacitive Touch Panel Cover Glass Segmentation
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Solution Overview
Problem
In display devices with electrostatic capacitive touch panels, static electricity generated by contact can reach the control circuit through the outer edge of the sensor film, causing malfunctions due to the limited coverage of the cover glass over the sensor film.
Innovation Solution
The electrostatic capacitive touch panel includes a sensor film with a cover glass protecting the first surface in a central area and a supporting member fixed to the outer edge area, extending the path of static electricity discharge and reducing the risk of circuit malfunctions, while optimizing the placement of the cover glass to minimize costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover glass is provided to cover the entire sensor film area, then the protection against static electricity is improved, but the manufacturing cost increases
Solution Approach 1:
The patent divides the sensor film area into two distinct zones: a first area where the cover glass is provided for static electricity protection, and a second area where the cover glass is omitted to reduce manufacturing cost. This segmentation allows selective application of the cover glass only where it is most needed for protecting the circuit substrate from static discharge.
Solution Approach 2:
The cover glass is strategically positioned to cover only the first area of the sensor film, which corresponds to regions where circuit substrates are located. This local quality approach ensures that static electricity protection is applied precisely where the circuit substrates need protection, rather than uniformly across the entire sensor film area.
2Ease of manufacture
If the cover glass coverage area is reduced to lower cost, then the manufacturing cost is reduced, but the protection against static electricity may be insufficient
Solution Approach 1:
The patent introduces a resin layer as an intermediary protective element that covers the circuit substrates in the first area. This resin layer works in conjunction with the cover glass to provide comprehensive static electricity protection, allowing the cover glass to be reduced in coverage area while maintaining adequate protection through the combined shielding effect of the cover glass and resin layer.
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 lengthens the path of static electricity discharge, reducing the likelihood of circuit malfunctions and lowering the cost of the cover glass by reducing its coverage area, while maintaining accurate touch detection and display quality.
Implementation Method 1
an electrostatic capacitive touch panel that detects a contact
Implementation Method 2
the cover glass is provided so as to cover the entire sensor film when viewed from a direction perpendicular to the display surface and protects the sensor film
Data Source
AI summary
Provided is a display device with an electrostatic capacitive touch panel including a display panel, the electrostatic capacitive touch panel, a circuit substrate provided with a control circuit that controls the display panel and the electrostatic capacitive touch panel, and a supporting member supporting the electrostatic capacitive touch panel, in which the electrostatic capacitive touch panel includes a sensor film having a first surface and a second surface on a side opposite to the first surface and detecting a contact with the electrostatic capacitive touch panel, and a cover glass protecting the first surface of the sensor film in a first area, which is a partial area in an area where the sensor film is present when viewed from a direction perpendicular to the first surface, and the supporting member is fixed to the first surface in a second area, which is an area outside the first area in the area where the sensor film is present when viewed in the direction perpendicular to the first surface.