Stylus system with proximity-based display activation

1 . A method comprising:

determining that a motion of a stylus has occurred;

transmitting, from the stylus to a wireless transceiver circuit on a mobile device, a notification of the motion of the stylus;

transmitting, from the wireless transceiver circuit to a touch controller circuit on the mobile device, a power-on signal;

transitioning the touch controller circuit from a low-power state to a working state;

transmitting, from the touch controller circuit, a short-range wireless connection beacon;

receiving, at the touch controller circuit, in an instance where the stylus is within atouch downlink distance of the touch controller circuit, a response from the stylus to the short-range wireless connection beacon;

transitioning a primary processor of the mobile device from a sleep state to a wake state in response to receiving the response from the stylus to the short-range wireless connection beacon; and

receiving, at the mobile device from the stylus, stylus data.

2 . The method of claim 1 comprising:

ceasing, in an instance where the stylus is at a distance greater than the touch downlink distance of the touch controller circuit for a first timeout duration, the transmitting of the short-range wireless connection beacon; and

transitioning the touch controller circuit from a working state to a low-power state.

3 . The method of claim 1 comprising:

rendering, by the primary processor on a display of the mobile device and based on the stylus data, output data.

4 . The method of claim 1 comprising:

a transmitting, from the wireless transceiver circuit to a touch controller circuit on the mobile device, a power-on signal in a dedicated electronic signal path from the wireless transceiver circuit to a touch controller circuit.

5 . A method comprising:

determining, by a mobile device, that motion of an input device has occurred;

sending, based on the determining of the motion of the input device, a power-on signal to a touch controller circuit;

sending a first wireless connection beacon using a short-range wireless communication protocol;

receiving acknowledgement data responsive to the wireless connection beacon from the input device;

sending, in an instance where a central processing unit (CPU) is in a low-power state, a power-on signal to the CPU in response to receiving the acknowledgement data from the input device to the short-range wireless connection beacon; and

receiving, using the short-range wireless communication protocol, input data associated with an interaction of the input device with a display of the mobile device.

6 . The method of claim 5 comprising:

sending, based at least in part on the acknowledgement data, the power-on signal to the CPU of the mobile device.

7 . The method of claim 5 comprising:

sending, based on a manual action of a user, the power-on signal to the CPU of the mobile device.

8 . The method of claim 5 wherein the sending of the power-on signal to the touch controller circuit occurs from a wireless transceiver circuit and in a dedicated electronic signal path to the touch controller circuit.

9 . The method of claim 5 comprising:

ceasing, in an instance where the input device is at a distance greater than a touch downlink distance of the touch controller circuit for a first timeout duration, the sending of the first wireless connection beacon using the short-range wireless communication protocol; and

sending a power-off signal to the touch controller circuit.

10 . The method of claim 9 comprising:

sending a second wireless connection beacon using the short-range wireless communication protocol;

sending, in an instance where no acknowledgement data responsive to the second wireless connection beacon is received from the input device within a second timeout duration, a power-off signal to the CPU.

11 . The method of claim 5 comprising:

receiving, by a wireless transceiver circuit, trajectory data from the input device; and

determining, based on the trajectory data, that the motion of the input device has occurred.

12 . The method of claim 5 comprising:

controlling, by the CPU, a display of the mobile device to render output data based on the input data.

13 . A system comprising:

a mobile device, comprising:

at least one processor;

a short-range wireless transceiver;

a display;

a touch controller circuit; and

non-transitory computer-readable memory storing instructions that, when executed by the at least one processor are effective to:

determine that motion of an input device has occurred;

send, based on the determination of the motion of the input device, a power-on signal to the touch controller circuit;

send a wireless connection beacon using a short-range wireless communication protocol and the short-range wireless transceiver;

receive, by the short-range wireless transceiver, acknowledgement data responsive to the wireless connection beacon from the input device;

send, in an instance where a central processing unit (CPU) of the mobile device is in a low-power state, a power-on signal to the CPU in response to receiving the acknowledgement data from the input device to the short-range wireless connection beacon; and

receive, by the short-range wireless transceiver, input data associated with an interaction of the input device with the display.

14 . The system of claim 13 , wherein the mobile device comprises:

an electronic signal path from the short-range wireless transceiver to the touch controller circuit dedicated to sending, based on the determination of the motion of the input device, a power-on signal to the touch controller circuit.

15 . The system of claim 13 wherein the instructions, when executed by the at least one processor, are effective to:

render, on the display and based on the input data, output data.

16 . The system of claim 13 , wherein the instructions, when executed by the at least one processor, are effective to:

cease, in an instance where the input device is at a distance greater than a touch downlink distance of the touch controller circuit for a first timeout duration, sending of the wireless connection beacon using the short-range wireless communication protocol; and

send a power-off signal to the touch controller circuit.

17 . The system of claim 13 , wherein the mobile device comprises a wireless transceiver circuit and wherein a determination that a motion of the input device has occurred is based on trajectory data of the input device received by the wireless transceiver circuit.

18 . The system of claim 13 , wherein the instructions, when executed by the at least one processor, are effective to:

send, in an instance where no input data is received by the touch controller circuit within a second timeout duration, a power-off signal to the CPU.

19 . The system of claim 13 wherein the instructions, when executed by the at least one processor, are effective to:

send, based at least in part on the acknowledgement data, a power-on signal to the CPU.

20 . The system of claim 13 comprising:

a stylus wherein the stylus is effective to:

receive a wireless connection beacon; and

send, based on the wireless connection beacon, acknowledgement data effective to transition the CPU from a low-power state to a working state.