Information handling system stylus location aid having selectable vibration

1. An information handling system comprising:

a housing;

a processor disposed in the housing and operable to execute instructions that process information;

a memory disposed in the housing and interfaced with the processor, the memory operable to store the instructions and information;

an embedded controller disposed in the housing and interfaced with the processor, the embedded controller operable to manage operating conditions in the housing;

a radio disposed in the housing and interfaced with the processor, the radio operable to communicate with radios external to the housing;

a stylus external to the housing and having a writing tip, a processing resource, a haptic device operable to vibrate at a frequency selected from a frequency range and interfaced with the processing resource and a radio interfaced with the processing resource;

a non-transient memory disposed in the housing and operable to store instructions and information;

a stylus locator having instructions stored in the non-transient memory that, when executed by at least one of the processors, the embedded controller or the processing resource, cause vibration of the haptic device at a frequency selected based upon a distance between the housing and the stylus;

a microphone interfaced with the processor and operable to detect audible sound of the haptic device;

wherein the stylus locator instructions analyze the audible sound to determine when the stylus is under an object.

2. The information handling system of claim 1 wherein the stylus locator instructions further:

radio communication by a wireless personal area network protocol; and

distance determined based upon the radio communication applying High Accuracy Distance Measurement (HADM).

3. The information handling system of claim 1 wherein the stylus locator instructions further:

radio communication by a wireless personal area network protocol; and

determine distance based upon the radio communication by applying a Radio Signal Strength Indicator (RSSI).

4. The information handling system of claim 1 wherein the haptic device comprises a haptic film operable to vibrate in range from a low frequency audible to human hearing to an ultrasonic frequency inaudible to human hearing.

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

a microphone operable to detect the ultrasonic frequency;

wherein stylus locator instructions further command an ultrasonic frequency, detect the ultrasonic frequency, and apply the ultrasonic frequency to determine a direction to the stylus.

6. The information handling system of claim 5 further comprising:

a speaker disposed in the housing and operable to output an audible noise; and

a microphone disposed in the housing and operable to detect the audible noise;

wherein the stylus locator instructions sense a time for audible noise to travel between the stylus and the housing to determine a distance between the stylus and the housing.

7. The information handling system of claim 6 wherein the audible noise has an ultrasonic frequency.

8. An information handling system comprising:

a housing;

a processor disposed in the housing and operable to execute instructions that process information;

a memory disposed in the housing and interfaced with the processor, the memory operable to store the instructions and information;

an embedded controller disposed in the housing and interfaced with the processor, the embedded controller operable to manage operating conditions in the housing;

a radio disposed in the housing and interfaced with the processor, the radio operable to communicate with radios external to the housing;

a stylus external to the housing and having a writing tip, a processing resource, a haptic device operable to vibrate at a frequency selected from a frequency range and interfaced with the processing resource and a radio interfaced with the processing resource;

an ambient light sensor disposed in the housing and interfaced with the processor operable to determine ambient light at the housing; and

a light disposed in the stylus and interfaced with the processing resource;

a non-transient memory disposed in the housing and operable to store instructions and information; and

a stylus locator having instructions stored in the non-transient memory that, when executed by at least one of the processors, the embedded controller or the processing resource, cause vibration of the haptic device when a stylus lost indication is detected;

wherein the stylus locator instructions further command through the radios illumination of the light in response to a predetermined ambient light when the stylus lost indication is detected.

9. A method for locating a stylus from an information handling system, the method comprising:

detecting a distance between the information handling system and the stylus;

applying the distance to command a haptic vibration at the stylus with a frequency selected from a frequency range;

detecting the audible noise with a microphone disposed in the stylus; and

analyzing the audible noise to determine that the stylus is disposed under an object.

10. The method of claim 9 further comprising:

vibrating a haptic film coupled at the stylus housing exterior to generate the haptic vibration; and

generating an audible noise by interaction of the haptic vibration against a surface on which the stylus rests.

11. The method of claim 10 further comprising:

comparing the detected audible noise with an expected audible noise for the selected frequency; and

in response to comparing, estimating whether the stylus is under an object.

12. The method of claim 10 further comprising:

vibrating the haptic film to generate an ultrasonic noise;

detecting the ultrasonic noise with a microphone of the information handling system; and

analyzing the detected ultrasonic noise to determine a direction to the stylus.

13. The method of claim 10 wherein the detecting a distance further comprises:

vibrating the haptic film to generate an ultrasonic noise; and

analyzing the ultrasonic noise to estimate the distance.

14. The method of claim 9 further comprising:

detecting an ambient light; and

when the ambient light is less than a predetermined ambient light, illuminating a light at the stylus.

15. The method of claim 10 wherein the haptic film comprises an electro-active polymer.

16. A method for locating a stylus, the method comprising:

scanning from a portable information handling system with a wireless personal area network for a stylus;

responding to the scanning from the stylus to the portable information handling system through the wireless personal area network;

analyzing at the portable information handling system the stylus responding to estimate a distance between the portable information handling system and the stylus;

communicating the distance from the portable information handling system to the stylus through the wireless personal area network; and

in response to the distance, vibrating a haptic film coupled at the stylus exterior at a frequency selected from a range of frequencies based upon the distance;

sensing ambient light at the portable information handling system; and

when the ambient light is less than a predetermined ambient light, commanding illumination of a light at the stylus with the vibrating.

17. The method of claim 16 further comprising:

detecting with a microphone at the portable information handling system an audible noise associated with the vibrating;

comparing the audible noise with an expected audible noise for the distance and selected frequency; and

determining from the comparing when stylus is under an object.