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NFI Touch Screen

NFI Touch Screen System combines an all glass sensor element and image processing controller with resident firmware, driver software, and a setup and diagnostic utility.
The touch screen sensor is composed of laminated layers of chemically strengthened glass. The base layer is patterned with a conductive sensor and optically bonded to a front layer of tough and durable glass. The sensor is highly transmissive and provides protection against glare and reflections. An AC signal is applied to the patterned conductive coating, creating an electrostatic field on the surface of the screen. When a finger – gloved or ungloved – or other conductive stylus comes into contact with the sensor, the electrostatic field is disturbed. The image processing controller detects the changes in distribution of the electrostatic field caused by a touch. The resident firmware is optimized to provide touch sensitivity, accuracy, and rejection of false touches.

Product Highlights

  • Outdoor, harsh environments – Performs consistently and accurately in extreme environmental conditions, including outdoors applications.
  • Extreme durability – Operation unaffected by most surface damage, including scratches, caused by abrasives, chemicals or vandalism.
  • Ruggedized Shock Resistance – Withstands significant shock and vibration without jeopardizing safety or performance.
  • Input Flexibility – Operates with gloves through moisture, dirt and other surface contaminants, as well as with a conductive stylus.

Contributions to the product:

Conceptualization and ResearchSoftware Development Process
Basic touch algorithm enhancements
Adaptive base-lining and signal processing
Coordinate interpolation and extrapolation algorithms
Overall firmware development process
Internal coding standards
Development tools selection
Version control system
Bug tracking system
Written Specifications and ProceduresEmbedded Software Architecture and Design
Hardware requirements and system I/O mapping
Functional specification
Simulation/emulation environment specification
Communication protocol specification
Simulation/emulation design
Overall firmware architecture
Firmware design documents
Code DevelopmentTesting & Debugging
Board start-up and boot-loader
Device drivers
Non-volatile memory management
Real-time framework
Communication protocol stack
Command interpreter
Firmware debug support
Exception/error handler
Performance analysis tools
Diagnostic tools for R&D
Touch controller functional tester
Technical leadershipIntellectual Property
Training and mentorship for the firmware team
Design authority and knowledge sharing