Information handling system totem with frictional tethering

1. An information handling system comprising:

a processor operable to execute instructions that process information;

a touchscreen display interfaced with the processor, the touchscreen display operable to detect touches and report the touches to the processor;

an input device disposed on the touchscreen display and having a predetermined footprint detected as a touch by the touchscreen display and reported to the processor;

a capacitive sensor integrated in the input device and operable to detect touches at the input device; and

a friction member disposed at a bottom surface of the input device and interfaced with the capacitive sensor, the friction member retracting into the input device in response to touch detected by the capacitive sensor and extending out of the input device in response to predetermined conditions detected at the input device;

wherein

the capacitive sensor further comprises a proximity sensor that detects end user proximity before an end user touch; and

the friction member retracts at a predetermined proximity.

2. The information handling system of claim 1 further comprising:

a solenoid coupled to the input device and the friction member;

wherein the solenoid activates to extend and retract the friction member.

3. The information handling system of claim 1 further comprising:

a microfluidic reservoir integrated in the input device and interfaced with the friction member;

wherein the microfluidic reservoir pressurizes to extend and depressurizes to retract the friction member.

4. The information handling system of claim 1 further comprising:

one or more accelerometers integrated in the input device and interfaced with the friction member;

wherein the predetermined conditions comprise accelerations sensed by the one or more accelerometers.

5. The information handling system of claim 4 wherein the friction member extends by variable amounts to create variable amounts of friction working against the touchscreen display, the amount of the extending based at least in part on accelerations detected by the one or more accelerometers.

6. The information handling system of claim 4 further comprising:

an input device monitor executing on the processor and interfaced with the one or more accelerometers; and

an input device user interface presented at the touchscreen display by the input device monitor that warns of input device separation from the touchscreen display if sensed accelerations exceed a predetermined condition.

7. The information handling system of claim 6 further comprising plural friction members that extend from the input device, the number of friction members extending from the input device based at least upon accelerations sensed at the input device.

8. The information handling system of claim 1 wherein:

the input device communicates to the processor upon detection of the predetermined conditions; and

in response to the predetermined conditions, the processor discards inputs associated with the input device.

9. A method for managing totems disposed on an information handling system touchscreen display, the method comprising:

extending, in response to predetermined conditions, a friction member from a bottom surface of the totem against the touchscreen display, the friction member engaging against the display to resist movement of the totem across the touchscreen display;

detecting, with a capacitive sensor, an end user proximity to the totem before an end user touch; and

in response to detecting the proximity before the end user touch, retracting the friction member into the totem.

10. The method of claim 9 further comprising:

sensing accelerations at the totem; and

applying the sensed accelerations to adjust friction member engagement against the touchscreen display to adapt to display tilt.

11. The method of claim 10 further comprising:

detecting end user proximity to the totem with a proximity capacitance sensor; and

starting the retracting of the friction member before the end user touch.

12. The method of claim 9 further comprising:

detecting removal of an end user touch from the totem; and

in response to the removal, extending the friction member to engage against the touchscreen display.

13. The method of claim 12 further comprising discarding inputs detected at the touchscreen display after removal of the end user touch as unintended movements associated with the totem.

14. The method of claim 13 further comprising:

extending the friction member with a solenoid; and

selectively extending plural friction members based upon accelerations detected at the totem.

15. The method of claim 9 wherein detecting further comprises:

extending the friction member with pressure applied from a microfluidic reservoir; and

adapting the surface area of the friction member by varying the pressure based upon accelerations detected at the totem.

16. The method of claim 9 further comprising:

detecting a display angle that exceeds a predetermined threshold; and

in response to detecting, issuing at warning at the touchscreen display regarding unintended movement of the totem.

17. An information handling system totem input device comprising:

a body having a bottom surface that interacts with a touchscreen display to make touch inputs at the touchscreen display;

one or more friction members disposed at the bottom surface and configured to selectively extend and retract, the one or more friction members when extended increasing frictional resistance to movement of the body against the touchscreen display; and

a capacitive sensor integrated in the body and configured to measure capacitance at the body associated with end user touch, the capacitive sensor selectively extending and retracting the one or more friction members based at least in part on measured capacitance indicating end user proximity to the body before an end user touch.

18. The information handling system totem input device of claim 17 further comprising:

one or more accelerometers integrated in the body and interfaced with the friction members and capacitive sensor, the accelerometers configured to measure lateral accelerations at the body;

wherein the friction members extend by varied amounts based at least in part upon measured lateral accelerations.