Why Samsung Foldable Screens Bubble and Lose Touch

Analysis of the Galaxy Fold display failure: how hinge geometry and support stress flexible display in foldable phones, causing bulging, touch loss, and blanking.

How Facial Recognition Turnstiles Work

Overview of facial recognition turnstiles for access control and attendance tracking in construction sites and factories, system components, workflows, and configurations.

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.

Awinic Trackpad Pressure and Haptic Solution

Technical summary of pressure-sensitive trackpad and haptic feedback implementation, covering Awinic AW8680X/AW86927 architecture, sensor ADC, motor driver, and HID PTP support.

Face Recognition: Principles and Process

Face recognition primer describing the technical pipeline: image acquisition and detection, data preprocessing, feature extraction, and similarity-based matching.

Iris Recognition for Smart Door Locks

Iris recognition for smart locks: technical advances - extended recognition range, self-tracking and dynamic matching - improving security and anti-spoofing.

How Fingerprint Unlock Works

Overview of fingerprint recognition: pattern types, optical/capacitive/RF capture methods, processing workflow from quality evaluation to feature extraction and matching.

Capacitive Touchscreen: Principles and Troubleshooting

Technical overview of capacitive touchscreen design, projected capacitive operation, optical artifacts, false touches, and calibration and driver guidance for reliable operation.

Three Under-Display Fingerprint Technologies

Technical overview of under-display fingerprint technologies—optical, ultrasonic, and capacitive—examining principles, trade-offs, production challenges, and market maturity.

Principles of Smartphone Touchscreens

Technical overview of capacitive touchscreen operation: explains capacitance, ITO electrode grids, projected-capacitive multitouch sensing, and why protectors work but gloves fail.

Why Iris Recognition Is Not Widely Adopted

Analysis of iris recognition challenges, advantages and comparison with face recognition, covering accuracy, spoof resistance, cost, device dependence and deployment trade-offs.

Resistive vs Capacitive Touchscreens: Key Differences

Comparison of resistive and capacitive touchscreens covering sensitivity, accuracy, durability, cost, multi-touch, and environmental tolerance.

Types of Touchscreen Technologies

Technical overview of touchscreen technology, system architecture, and comparison of resistive and capacitive touch sensing methods used in embedded devices.

Capacitive vs Resistive Touchscreens: Key Differences

Technical comparison of capacitive touchscreens and resistive touchscreens, covering operating principles, mutual/self-capacitance, multi-touch and practical selection criteria.

Comparing Emerging Materials for Touch Panels

Overview of metal mesh as an ITO alternative for touch panels: materials, fabrication methods, adoption and key challenges in transmittance, line width, and durability.

Overview of Face Recognition Technology and Applications

Technical overview of face recognition: detection methods, feature types, challenges (illumination, pose, occlusion), applications and security concerns in biometric systems.

TVS Diode Causing Power-On Short in Industrial Touchscreen

Incident report on an industrial touch screen where a failed TVS diode caused a power short; troubleshooting, diode role, selection guidelines, and transient protection advice.

Why modern touchscreens no longer need calibration

Explains why early resistive touchscreens required user calibration and why modern capacitive touchscreens typically avoid calibration by using capacitance-based position sensing.

Resistive vs Capacitive Touchscreens: Concepts and Differences

Overview of resistive touchscreen and capacitive touchscreen technologies: operating principles, pros and cons, multi-touch behavior, durability, and input suitability.

Common Touchscreen Technologies and How Mobile Touchscreens Work

Overview of common touchscreen technologies and how mobile touch works, explaining capacitive and resistive touchscreen principles, SAW, optical and light-guide methods.