Fingerprint Recognition: Types and Principles

Overview of fingerprint recognition: feature extraction, enrollment/verification, template use, and sensor technologies — optical, capacitive, and ultrasonic.

Access Control System Components and Installation

Overview of access control system components, including identity recognition, sensors, controllers, locks, wiring, and detailed installation, commissioning and grounding guidelines.

What Is Hover Touch and How It Works

Overview of hover touch (pre-touch): how capacitive self- and mutual-capacitance sensing enables hover detection on phones, tradeoffs, and practical applications.

Under-Display Fingerprint Methods and Development Trends

Overview of under-display fingerprint recognition technologies (optical, ultrasonic, capacitive), comparing implementation trade-offs, production readiness, and industry trends.

Face Fusion with Deep Learning: Technical Analysis

Practical engineer's guide to face fusion using Delaunay triangulation, affine transforms and seamless cloning, covering landmark workflows and triangle-based warping.

Can facial recognition reduce retail theft?

Analysis of facial recognition in retail: how connected databases, camera placement and privacy concerns affect its effectiveness against shoplifting and evolving theft tactics.

Capacitive Touchscreen Structure and Principle

Technical overview of capacitive touchscreen structure and sensing principle, covering ITO layers, electrode placement, coupling capacitance, and touch coordinate calculation.

Human-Computer Interaction: Roles and Main Interaction Methods

Overview of human-computer interaction (HCI): principles, roles and main interface types—GUI, voice, touch, gesture, VR/AR and brain-computer interfaces.

How Capacitive and Other Touchscreens Detect Input

Technical overview of capacitive screen operation and touchscreens: capacitive sensing, sensor arrays, multi-touch, plus resistive and pressure-based detection methods.

How the Touchscreen Was Invented

Technical overview of touchscreen history and evolution, from Johnson's early prototype to Hurst's resistive touchscreen, adoption, materials, and multi-touch trends.

Four Common Touchscreen Repair Techniques

Practical touchscreen repair cases and troubleshooting guide covering diagnostics, backlight and circuit fixes, calibration issues, grounding and connector remedies

Palmprint Recognition: How It Works vs Fingerprint

Overview of palmprint recognition for payments: CIS imaging (global-shutter vs rolling-shutter, BSI+global-shutter), algorithm pipeline, vein verification, and market trade-offs.

Biometrics vs Face Recognition

Compare biometrics and face recognition: definitions, technical process, application areas, key differences, and privacy/security considerations.

Face Recognition Access Control: Functions and Uses

Technical overview of face recognition access control systems, covering facial authentication, turnstile integration, security features, centralized management, and use cases.

How Smartphone Touchscreens Work

Overview of resistive and capacitive touchscreens: how capacitive touch detection uses coupling capacitance and ITO sensing layers, plus limitations like wet-screen drift.

Fixing Capacitive Touchscreen Malfunctions

How capacitive touchscreens work and causes of touchscreen drift (capacitance drift), including contamination, unstable supply, temperature, static, plus troubleshooting steps.

Does a Capacitive Screen Cause Ghosting While Charging?

Explains how capacitive touchscreen errors while charging stem from power-supply instability and charger noise, and recommends using genuine chargers, filtering, or firmware fixes.

Capacitive Touch Sensing Using MCU Microcontrollers

Technical overview of touch sensing for microcontrollers, comparing capacitive and resistive interfaces, dedicated touch ICs, and MCU-based implementation trade-offs.

Three Methods for Fingerprint Recognition

Technical overview of under-display fingerprint recognition methods: optical, ultrasonic, and capacitive; compares implementations, production maturity, and development trends.

Six Ways to Fix an Unresponsive Smartphone Touchscreen

Diagnose and fix intermittent smartphone touchscreen unresponsiveness with six steps: test chargers/outlets, charge from PC, reboot, use recovery mode and avoid unofficial ROMs.