Under-screen Fingerprint Sensor Touch Input Differentiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Under-screen fingerprint sensors in electronic devices often misinterpret user touches on the display screen as fingerprint recognition inputs, leading to misoperations due to the inability to accurately distinguish between touch events.
Innovation Solution
A method is implemented where the processor determines whether a touch event is within a specific region of the display screen corresponding to the fingerprint sensor, using a predetermined threshold to differentiate between simple touches and fingerprint recognition inputs by analyzing the area size of the touched region, with separate averages calculated for touch and fingerprint operations to set this threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fingerprint sensor is installed under the touch display screen to enable fingerprint recognition, then the device security and functionality are improved, but the system cannot accurately distinguish between user touches and fingerprint recognition inputs, leading to misoperations
Solution Approach 1:
The patent segments the touch input detection into two distinct processes: general touch detection by the touch screen and fingerprint-specific detection by the fingerprint sensor. By dividing the detection functions and processing them separately with different threshold criteria, the system can accurately distinguish between ordinary touches and fingerprint recognition attempts, resolving the misoperation issue while maintaining both touch functionality and fingerprint security.
Solution Approach 2:
The patent applies different pressure thresholds and detection parameters for touch operations versus fingerprint recognition. The touch screen uses one set of sensitivity parameters while the fingerprint sensor uses another set optimized for fingerprint detection. This parameter differentiation allows the system to reliably distinguish between the two types of inputs, preventing misoperations while maintaining both functionalities.
2Reliability
If the system responds to all touches in the fingerprint sensor region as fingerprint recognition attempts, then fingerprint security is enhanced, but normal touch operations in the same region become unresponsive or cause misoperations
Solution Approach 1:
The patent implements dynamic response based on the detected input type. When the fingerprint sensor detects a valid fingerprint pattern, the system activates fingerprint recognition mode with corresponding security functions. When only a regular touch is detected without fingerprint characteristics, the system responds with normal touch operations. This dynamic adaptation allows the same physical region to serve both purposes without conflict.
Solution Approach 2:
The system uses feedback from the fingerprint sensor to determine whether to activate fingerprint recognition or respond as a normal touch. The fingerprint sensor continuously monitors the touch region and provides feedback about whether a fingerprint is present. Based on this feedback, the system dynamically adjusts its response, ensuring both security and operational responsiveness.
Data Source
AI summary
A method for distinguishing between touches intended as commands on a display screen and fingertip presentation for fingerprint recognition, applied to an electronic device, includes: (Step 1) detecting a touched area of a touch event on a display screen; (Step 2) determining whether an area size of the touched area is greater than a predetermined threshold; (Step 3) when the area size of the touched area is smaller than the predetermined threshold, determining that the touch event is a touch operation and executing a corresponding function; and (Step 4) when the area size of the touched area is greater than the predetermined threshold, determining that the touch event is for fingerprint recognition, detecting the fingerprint input by the fingerprint sensor and executing a function corresponding to the fingerprint presentation and recognition.