How to easily add haptics to your display: Page 3 of 3

June 28, 2018 // By Chris Chinnock
Adding haptic technology with a tactile touch sensation to touchscreen displays has become a significant design trend within many industries. Automotive, industrial and medical interfaces where the users can't always visually confirm touchscreen actions are clear areas of need for haptic technology. While a number of solutions exist, all involve trade-offs in terms of size, power and functionality.

Professor Tan then described how signals at different frequencies can feel. "A 10-15 Hz signal feels like 'flutter,' a 30-50 Hz signal feels 'rough' (like a jack hammer), and above 100Hz , the sensation is 'smooth vibration'," continued Tan.

The chart below shows the performance envelopes of the three PowerHap actuators. Note that all are well above the human detection threshold over a wide range of frequencies vs. the LRA solution with a narrow frequency range.


The PowerHap shows no significant frequency or amplitude limitations for customized haptic feedback to key human mechanoreceptors.

Another important feature of the PowerHap actuator and Boréas driver combination is the ability to deliver a very low latency response speed of less than 1ms at the system level - not just the actuator. Low latency is important to get fast feedback so the user doesn't keep pressing a button or pressing harder because the haptic response to the touch was too slow.

Finally, TDK summarized the PowerHap performance specifications compared to competitive technologies. 


A comparative summary of haptic actuators' specifications, showing the superiority of PowerHap.

 

About the author:

Chris Chinnock is the founder and President of display consultancy Insight Media - www.insightmedia.info and organizer of the www.displaysummit.com. He can be reached at chris@insightmeda.info

 

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