Conductive Aid for Capacitive Touchscreen Operation
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Solution Overview
Problem
Capacitive touchscreens are not functional for users wearing thick gloves or those with prosthetic limbs, as they rely on direct contact and body conductivity to operate, which is not possible in these cases, limiting their ability to interact with capacitive interfaces.
Innovation Solution
The development of conductive aids such as finger socks, adhesive conductive patches, and integrated conductive tips for prosthetic limbs, which can be connected to the user's skin via conductive lines to provide the necessary electrical charge, allowing for effective interaction with capacitive touchscreens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If capacitive touchscreen relies on direct contact and body conductivity, then it achieves simple and reliable operation, but it becomes unusable for users wearing thick gloves or with prosthetic limbs
Solution Approach 1:
The patent introduces a conductive aid as an intermediary element between the user and the capacitive touchscreen. This aid includes a conductive body portion that contacts the touchscreen and a conductive element that connects to the user's body, thereby mediating the capacitive coupling when direct contact is not possible due to gloves or prosthetics
Solution Approach 2:
The patent changes the electrical parameters by introducing external conductive elements that provide the necessary capacitance and conductivity. The conductive aid modifies the electrical field interaction by adding conductive material where natural body conductivity is blocked, enabling the touchscreen to detect the touch input
2Reliability
If thick gloves or prosthetic limbs are worn, then user protection or medical necessity is achieved, but capacitive touchscreen functionality is lost
Solution Approach 1:
The conductive aid serves as a mediator that bridges the gap between the protective barrier (gloves or prosthetics) and the touchscreen. The conductive body portion makes contact with the touchscreen while the conductive element connects through or around the barrier to the user's body, restoring functionality without compromising protection
3Adaptability or versatility
If conductive aid is added to enable touchscreen operation, then user compatibility is improved, but device complexity increases
Solution Approach 1:
The conductive aid is segmented into distinct functional portions: a conductive body portion that interfaces with the touchscreen and a conductive element that connects to the user's body. This segmentation allows each part to perform its specific function independently while working together as a system
Solution Approach 2:
The conductive aid is designed to be universally applicable to different users and situations - it can be used with thick gloves, prosthetic limbs, or other barriers. The same basic structure serves multiple functions: providing conductivity, maintaining user protection, and enabling touchscreen operation across various use cases
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
Enables users with prosthetic limbs and those wearing thick gloves to operate capacitive touchscreens by creating a conductive pathway, overcoming the limitations of direct contact and body conductivity, thus expanding the usability of capacitive interfaces.
Implementation Method 1
The conductive tip may be connected by lead wire to a patch on an area of the user's skin, thereby providing the tip of the finger sock with the electrical charge from the user's skin
Implementation Method 2
The capacitive touchscreen relies on the capacitance of the human body to break or alter an electric field set up around a button so configured
Implementation Method 3
In operation, the screen sets up an electrostatic field. When the human finger, having a charge of its own, comes into contact with the touchscreen a distortion of the screen's electrostatic field results
Data Source
AI summary
An apparatus that allows a glove wearer or the wearer of a prosthetic limb to operate a device having a capacitive touchscreen is disclosed. There are three solutions provided in the disclosed invention. The first embodiment of the disclosed invention is directed to a conductive finger sock that can be applied to a digit of a non-conductive artificial limb. The finger sock may cover the whole digit of the artificial limb or may cover only the tip. The second embodiment is an adhesive element having a conductive material such as a conductive thread or a conductive sponge material. The adhesive element can be attached to a glove or to a prosthetic limb or may be used as an actual bandage. The third embodiment of the disclosed invention is directed to a factory integrated conductive tip that is part of a digit of a non-conductive artificial limb. Regardless of the embodiment, the conductive element may be attached to the wearer's skin by a conductive line or may be used without the conductive line and thus may function in isolation.