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Document Number: 6500493 Rev. 1.1

Pg. 1

MulTI-Touch

Projected Capacitive Touch Screen

Integration Guide

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Summary of Contents for MulTI-Touch

Page 1: ...Document Number 6500493 Rev 1 1 Pg 1 MulTI Touch Projected Capacitive Touch Screen Integration Guide ...

Page 2: ...ation and recommendations are provided for the user s convenience but their accuracy or completeness is not warranted Specifications are subject to change without notice Touch International products and software are warranted to meet their published specifications from the date of shipment and for the period stated in the specification The customer is responsible for determining whether the Touch ...

Page 3: ...Document Number 6500493 Rev 1 1 Pg 3 Document Revision History Revision Page Content Revised By Date 1 0 1 13 Initial Release Mani Thangaraju 5 3 2011 1 1 1 13 Revision Logo Etc Shaun Detmer 4 20 2014 ...

Page 4: ...h Screen that is visible after a bezel is mounted Active Area This is the area of the Touch Screen that will recognize a touch event Underlay A graphic to define keys and buttons for certain display applications ESD This refers to electrostatic discharge VHB This refers to a very high bond EMI This refers to electro magnetic interference RFI This refers to radio frequency interference 2 0 Touch Sc...

Page 5: ...event any static damage to electronic components 3 Clean both sides of the touch screen with a non abrasive anti static solution lens cleaner 4 Clean both sides of the touch screen again with rubbing alcohol 5 Repeat steps 3 and 4 as needed until the touch screen is free of all contaminants such as fingerprints or dust 6 Allow the touch screen to fully dry before integrating 4 0 Touch Screen Integ...

Page 6: ...nting 4 3 Touch Screen Placement and Alignment When choosing a MulTI Touch touch screen ensure that its active area will fit with the active area of your display The active area of the sensor is enclosed by the edge sensor leads Please see Figure 4 for more details Carefully align the active area of the touch screen to the active area of the display To ensure accurate performance the center X and ...

Page 7: ...ponents that create electro magnetic or radio frequency interference Refrain from mounting the controller near devices that generate signals in the range of 50 kHz to 100 kHz as well as transformers and backlight inverters Mounting near these devices can interfere with the performance of the touch screen and controller If a plastic bezel is utilized metalizing and grounding the bezel will help min...

Page 8: ...sitive Please wear a grounded wrist strap while handling the controller Make sure that the controller is grounded to the display s casing or housing Mount the controller as far as possible from components that produce signals from 50 kHz to 100 kHz as well as transformers and backlight inverters Nothing should contact the top and bottom sides of the controller otherwise the controller may short ou...

Page 9: ...ure 7 Grounded Stand Off Figure 8 Grounded Cable If height restrictions cannot accommodate the use of standoffs thin gaskets may be used to mount the controller as long as the controller is properly grounded with a cable Please refer to Figure 9 for this set up Figure 9 Gasket Mounting with Grounded Cable ...

Page 10: ... or the conductive surfaces should be shielded and separated from one another by at least 0 1 Shielding can be applied by placing Kapton or copper tape on the touch screen tails The touch screen tails should not bend at a radius less than 0 125 as seen in Figure 10 If the sensor tail runs through slots or around sharp edges cushion the sharp edges to prevent damage to the sensor tails Please refer...

Page 11: ...nector clips on the control board as indicated by the red arrows in Figure 12 a After the clips have been pulled out insert the sensor tails with the exposed copper wiring on top as indicated by the blue arrows 2 Once the sensor tails have been fully inserted into the connectors close the connector clips to secure the sensor tails in place Figure 12 b illustrates this step Figure 12 a Step 1 Figur...

Page 12: ...ommunication for the control board 1 A Projected Capacitive controller can use a USB mini cable to both power the board and provide data communication This is illustrated in Figure 14 a 2 A Projected Capacitive controller can use a RS232 cable for data communication and a USB mini cable to power the board Another option is to use the RS232 cable for data communication and a power cable These diffe...

Page 13: ...noise level 8 3 Interference Projected Capacitive sensors and controllers can be influenced by EMI and RFI Make sure that the controller is placed far from devices such as transformers and inverters EMI and RFI can severely affect the performance of the touch screen Grounding the controller will help reduce EMI and RFI 9 0 Maintaining the Touch Screen Caution Do not use any cleaners with chemicals...

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