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Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
Touch Panels – Capabilities, Design, & Assembly Webinar
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Touch Panels – Capabilities, Design, & Assembly Webinar

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With all of the exciting new touch screen technologies in the market today, choosing the best product for your application can be a struggle. Check out our touch panel webinar for an in-depth …

With all of the exciting new touch screen technologies in the market today, choosing the best product for your application can be a struggle. Check out our touch panel webinar for an in-depth discussion with Derek Dixon, our User Interface Products Sales Director to learn more about the capabilities, design, application challenges and assembly of touch panels.

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  • 1.  Touch PanelsCapabilities, Design, & Assembly [1.18.13]  DELIVERING QUALITY SINCE 1952.
  • 2. Agenda Touch panels are the new interface standard Epec’s Touch Technologies – Benefits – Applications – Sizes Design/Engineering Assembly/Integration Summary 2
  • 3. Resistive Touch Panels Two transparent electrode layers (film/film or film/glass) are separated by very small transparent insulation spacers. Pressure from a finger or stylus brings the layers into contact. The result is a drop in voltage at the contact point. The change in voltage is detected by the controller. 3
  • 4. Resistive Touch Panels 4-Wire – X/Y are separate layers. – Touch screen will not operated with damaged top layer. 5-Wire – Bottom layer contains all the electrodes. – Top layer is probe. – Increased durability. • Operates with scratched/cut top layer. 4
  • 5. Resistive Touch Panels 8-Wire Based on 4-wire technology. (4) additional sensing points are used to reference sensor voltage back to the controller. – Better accuracy and reduces need for calibration. – Usually seen in larger sizes (10”+) 5
  • 6. Resistive Touch Panels Benefits – Lowest cost technology – Low power consumption – Pressure actuated. • Finger, gloves and stylus. – Resistant to water and dust. Limitations: – One Touch – Lower light transmission (78 - 82%) – Lower durability than other technologies • 4-wire: 1 Million touches • 5-wire: 10 Million touches • 8-wire: 1 Million touches Size Range: 2.8 - 21” (Diagonal) – Standard and custom sizes. 6
  • 7. Infrared Touch Panels Infrared touch panel employs an array of vertical and horizontal Infrared LEDs and sensors that detect the interruption of a light beamed across the surface of the screen. 7
  • 8. Infrared Touch Panels Benefits – Large sizes – Multi-touch capable (2 touches) – Works with any opaque object. – High durability – No glass substrate Limitations: – Profile height • Bezel must be designed to include IR sensors – Sunlight immunity can be a problem – Finger or conductive stylus only. Size Range: 15- 46” (Diagonal) – Standard and custom sizes 8
  • 9. Surface Capacitive A transparent electrode film is placed on glass substrate (under scratch resistant cover). A small voltage is applied to each corner, generating a uniform low voltage electrical field across the panel. The location of a touch is calculated by the change in the electrical current. 9
  • 10. Surface Capacitive Benefits – 90% light transmission – Unaffected by moisture, temperature and dust. – Works with finger and conductive stylus. – Over 100 Million actuations. Limitations: – Single touch – Finger or conductive stylus only. – May require calibration (EMI) Size Range: 5 - 24” (Diagonal) – Standard and custom sizes 10
  • 11. Projected Capacitive (PCAP) 1 or 2 conductive layers form an X-Y array of lines to create a grid of electrodes. The X/Y intersections are scanned continuously. 11
  • 12. Projected Capacitive (PCAP) By apply voltage, a grid of capacitors is created. Bringing a finger close to the sensor changes the electrostatic field. The change at every point on the grid is measured to determine the location. 12
  • 13. Projected Capacitive (PCAP) Benefits – Glass top layer • Scratch resistant – Multi-touch – recognizes two or more simultaneous touch points. • 2- 10 multi-touches (dependent on controller) – Touch coordinates are drift free. – Precise position location – Excellent optical clarity (90%+) – Zero-bezel design (flush surface) – Auto-calibration Limitations – Gloved hand* – Higher cost Size Range: 7 - 24” (Diagonal) 13
  • 14. Touch Controllers/Interfaces Controller – PCBA – Chipset – COF (Chip on flex) Interface – USB – RS232 – 12C or (I2C) Drivers available for most operating systems including – Windows – Linux – Android 14
  • 15. Design Considerations What is the best solution for my product? – Size – Environment – Application • Aerospace, medical and military – Durability • Number of touches • Surface hardness • Sealing – Nema4 and IP65 – Input • Stylus, gloved hand, finger – Cost 15
  • 16. Touch Panel Integration Mounting the touch panel to the display – Rear Mounting – Front Mounting 16
  • 17. Touch Panel Integration General Guidelines – A. Bezel edge to active area - 1.00 mm (min) – B. Bezel edge to viewable area - .8mm (min) – C. Bezel face to touch screen - .3 - .7 mm – D. Gasket edge to viewable area – 1.00 (min) • Spacing may need to increase due to gasket material. Gasket material selection – NEMA 4 and IP65 standards 17
  • 18. Comparison Chart There is no perfect touch technology! TOUCH TECHNOLOGY Surface Projected Resisitive Capacitive Capacitive Infrared Size 2.8 - 21" 5 - 24" 7 - 24" 15 - 46" Touch Accuracy Good Good Excellent Good Operating Force 50g - 100g 0g 0g 0g Light Transmission Poor/Good Very good Excellent Excellent Calibration Stability Poor/Good Poor Good Excellent Touch Life 1 - 10 Million 100 Million Unlimited Unlimited Gloved Hand Yes No Yes Yes Stylus Yes Cond. Stylus Cond. Stylus Yes Sealing Nema 4/IP65 Nema 4/IP65 Nema 4/IP65 Nema 4/IP65 Multi-touch No* No Yes No Operating Temp (10) -70°C* (20) -70°C (10) -70°C (20) -70°C Humidity Good Excellent Excellent Excellent Surface Moisture Unaffected Unaffected Unaffected Affected Surace Contaminants Unaffected Unaffected Unaffected Affected 18
  • 19. Summary Multiple touch technologies. – Epec’s technology offerings cover over 90% of the touch units sold. Standard and custom sizes. – Engineering documentation is available for standard sizes. Design support from concept through production. – Reverse engineering 19
  • 20. Build To Print Electronics We are a leading provider of printed circuit boards, flex and rigid-flex circuits, membrane switches, touch panels, silicone rubber keypads, graphic overlays, custom battery packs, and electronic fans & motors. 20
  • 21. Thank You If you require additional information please contact us with any questions or requests. North American Headquarters 174 Duchaine Blvd. New Bedford, MA 02745 Tel: (508) 995-5171 Fax: (508) 998-8694 Contact Us By Email: Sales sales@epectec.com Quotes quoting@epectec.com Engineering engineering@epectec.com Visit Our Website For More Information www.epectec.com Stay Connected with Epec Engineered Technologies Join our Social Community and keep in touch with all our latest technology investments, current news, upcoming events, and promotions. Visit our Social Media Websites for more information. 21

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