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Automotive Touchscreen Haptic Feedback

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As the user interfaces of in-car entertainment systems become more sophisticated, it becomes more difficult to control them hands-free without looking directly at the screen. The lack of tactile feedback causes the user's brain to look at the screen to confirm input selection. By incorporating load cells to measure contact force, the on-board computer can confirm correct and incorrect inputs using variable vibrations, assuring the driver that his or her action has been correctly recorded.

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How it works :

  1. The LSB200 miniature load cell is placed behind each mounting corner of the touch screen. A bolt passes through each load cell holding both the display and the load cell.
  2. When the user taps the screen, the sensors measure the force of the tap.
  3. This force is then amplified via an IDA100 module powered by 12V from the vehicle.
  4. The amplified signal is sent to a computer that activates a vibromotor proportionally in response to the touch force.

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