Touch Input Device Pressure Feedback for Secure Unlocking
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Solution Overview
Problem
Touch screens lack effective methods for securely unlocking devices based on touch pressure, area, and time, leading to potential errors and security concerns due to the difficulty in accurately determining touch levels.
Innovation Solution
A touch input device with a touch screen that displays a passcode input window, utilizing a controller to generate control signals based on the number, order, and pressure level of touched nodes, classified into at least two pressure levels, allowing for secure unlocking by matching predetermined passcode criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch screen security is enhanced by using touch pressure, area, and time for passcode input, then security level is improved, but measurement precision of touch levels deteriorates due to difficulty in accurately determining touch parameters
Solution Approach 1:
The patent applies feedback by providing visual indicators on the touch screen that show the detected touch pressure level, area, and duration in real-time. This feedback mechanism helps users adjust their touch input to match the required passcode parameters, thereby improving measurement precision while maintaining enhanced security through multi-parameter authentication
Solution Approach 2:
The patent changes the parameters used for authentication from simple touch detection to multi-parameter detection including pressure level, touch area, and touch time duration. By classifying touch pressure into multiple levels and analyzing these parameters collectively, the system achieves both higher security and improved measurement precision through sophisticated parameter analysis
2Reliability
If multiple touch parameters (pressure, area, time) are used for passcode input, then security is improved, but device complexity increases
Solution Approach 1:
The patent makes the touch screen serve multiple functions: it acts as both the display interface and the sensing interface for detecting touch parameters. The same touch screen hardware is used for displaying passcode input windows and for sensing pressure, area, and time parameters, thereby reducing device complexity while maintaining enhanced security through multi-parameter authentication
3Measurement precision
If touch pressure classification into multiple levels is implemented, then measurement precision is improved, but ease of operation deteriorates due to difficulty in controlling touch pressure
Solution Approach 1:
The patent provides visual feedback on the touch screen that indicates the current touch pressure level detected. This feedback allows users to see whether their touch pressure is too light, too heavy, or just right, making it easier to control and adjust their touch pressure to match the required passcode parameter, thereby improving ease of operation while maintaining measurement precision
Data Source
AI summary
In one embodiment, the invention can be a touch input device capable of unlocking a passcode accordance with a touch pressure. The device can include a touch screen which displays a passcode input window; a controller which generates a first control signal as to whether or not a touch on the passcode input window matches a predetermined passcode; and a memory which stores the predetermined passcode. The passcode input window can include a plurality of nodes which are disposed in different positions. The number of touched nodes among the plurality of nodes, the order of the touched nodes among the plurality of nodes, and a pressure level of the touch on each of the touched nodes among the plurality of nodes can be set as the predetermined passcode. Further, the pressure level of the touch can be classified into at least two levels.