DRV2603 Demonstration Program

www.ti.com

Figure 2 and Figure 3 compare the acceleration (in blue) between a driver without auto-resonance

detection and a driver with auto-resonance detection.

Figure 2. LRA Auto-Resonance Off

Figure 3. LRA Auto-Resonance On

2.2.3

Mode 2 – LRA Clicks

Mode 2 showcases LRA clicks and double clicks. Notice the difference in length of the click with braking

and without braking. Then compare the double clicks and notice the event separation is only possible with

braking.

Figure 4 and Figure 5 show the difference between a click with braking and a click without braking. Notice

the acceleration (in blue) is much longer when braking is not applied.

Figure 4. LRA Click without Braking

Figure 5. LRA Click with Braking

2.2.4

Mode 3 – User Interface Effects

Mode 3 showcases LRA user interface effects.

1. Button 1 – Basic click effect

2. Button 2 – Click and Release effect – when holding the board press this button. The button will click

when pressed down and bump when released giving a full button effect.

3. Button 3 – Double tick effect – the double tick effect can be used for a backspace key or some other

special function key.

4. Button 4 – Scroll wheel effect – press this button while holding the board and feel the scroll-like effect

imitating a flick or scroll gesture.

6

DRV2603 ERM/LRA Haptic Driver Evaluation Kit

SLOU340A – May 2012 – Revised May 2012

Submit Documentation Feedback

Copyright © 2012, Texas Instruments Incorporated