Pressure Sensing Assembly with Integrated Fingerprint Identification
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Solution Overview
Problem
Existing display devices with integrated fingerprint identification modules face issues of increased power consumption and signal interference due to unnecessary operation of the fingerprint identification module, affecting the display effect.
Innovation Solution
A pressure sensing assembly integrated with a fingerprint identification function, comprising pressure sensing units and control units, where the fingerprint identification module is activated only upon detection of pressure, reducing unnecessary power consumption and signal interference by using pressure sensing modules and switching transistors to control the connection of pressure sensing and fingerprint identification signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fingerprint identification module is continuously activated in a full-screen display device, then the fingerprint identification function is always available, but the power consumption increases and unnecessary noise occurs due to circuit coupling
Solution Approach 1:
The patent applies preliminary action by activating the fingerprint identification module only when pressure is detected before fingerprint recognition is needed. The pressure sensing unit continuously monitors pressure, and only when pressure exceeds a threshold does the system activate the fingerprint identification module, thereby preparing the system in advance only when necessary rather than keeping it continuously active.
Solution Approach 2:
The patent implements dynamics by making the fingerprint identification module's operational state changeable based on real-time pressure conditions. The module dynamically transitions between active and inactive states according to whether pressure is detected, allowing the system to adapt its configuration to current operational needs rather than maintaining a fixed state.
2Reliability
If the fingerprint identification module operates continuously, then fingerprint recognition is always ready, but unnecessary noise occurs due to circuit coupling affecting display effect
Solution Approach 1:
The patent applies the taking out principle by separating the activation control of the fingerprint identification module from continuous operation. The module is extracted from the always-on state and instead activated only when pressure sensing triggers it, thereby removing the source of continuous circuit coupling noise while preserving fingerprint recognition capability when needed.
3Use of energy by moving object
If the fingerprint identification module is activated only upon pressure detection, then power consumption is reduced, but the response time for fingerprint recognition may be delayed
Solution Approach 1:
The pressure sensing unit continuously monitors pressure in advance, so when a finger is placed on the screen, the system is already prepared to activate the fingerprint identification module immediately. This preliminary monitoring eliminates the delay that would occur from cold-starting the module, as the activation condition is already being watched for in real-time.
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 solution effectively reduces power consumption and prevents signal interference, ensuring the fingerprint identification module operates only when needed, thereby maintaining a clear display effect and optimizing resource usage.
Implementation Method 1
The pressure sensing module in the nth row and the mth column is configured to output a pressure sensing electrical signal corresponding to a pressure applied thereto
Implementation Method 2
The fingerprint identification module in the nth row and the mth column is configured to, upon the receipt of the fingerprint identification control signal, convert a received optical signal into a corresponding fingerprint identification electrical signal
Data Source
AI summary
A pressure sensing assembly integrated with a fingerprint identification function includes a pressure sensing unit and a control unit. The pressure sensing unit includes a plurality of pressure sensing sub-units arranged in N rows and M columns, a pressure sensing processing sub-unit, and a fingerprint identification processing sub-unit, where N and M are each a positive integer. A pressure sensing sub-unit in an nth row and an mth column includes a pressure sensing module in the nth row and the mth column and a fingerprint identification module in the nth row and the mth column. The pressure sensing processing sub-unit and the fingerprint identification module in the nth row and the mth column are connected to the control unit, where n is a positive integer smaller than or equal to N, and m is a positive integer smaller than or equal to M. The control unit is configured to, upon the receipt of a pressure sensing indication signal, transmit a fingerprint identification control signal to the fingerprint identification module in the nth row and the mth column.