Power and communication modes for digital license plate
A digital license plate system having various power and communication modes to improve performance and increase expected battery life is disclosed. In one embodiment, a response to a sensor triggered plate event requires determination of whether a vehicle is running, parked or in-motion. This determination involves waking the processor, establishing wireless connectivity, and determining if the vehicle is in motion based on local sensor data.
1. A power system for a digital license plate comprising:
a digital license plate attached to a vehicle and connected to receive data through a wireless connection, wherein the digital license plate has a SLEEP mode, an ON mode, and an In Motion mode; and wherein
the digital license plate is configured to receive power from a battery of the vehicle at a voltage;
a trigger to move from a sleep mode to an ON mode, the trigger being programmed to move from the sleep mode to an ON mode in response to the voltage transitioning from a parked level to an operation level.
2. The power system of claim 1 , wherein the parked level is 12.6 volts and the operation level is 13.7 volts.
3. The power system of claim 1 , wherein the trigger is further programmed to convert the voltage to a digital value and evaluate whether the digital value indicates transitioning from the parked level to the operation level.
4. A power system for a digital license plate comprising:
a digital license plate attached to a vehicle and connected to receive data through a wireless connection, wherein the digital license plate has a SLEEP mode, an ON mode, and an In Motion mode; and wherein
a trigger programmed to move the digital license plate from the SLEEP mode to the In Motion mode in response to a change in vehicle location meeting a threshold condition.
5. The power system of claim 4 , wherein the trigger is further programmed to:
move the digital license plate from the In Motion Mode to the SLEEP mode in response to failing to detect a change in vehicle location meeting the threshold condition for more than a predetermined time.
6. A power system for a digital license plate comprising:
a digital license plate attached to a vehicle and connected to receive data through a wireless connection, wherein the digital license plate has a SLEEP mode, an ON mode, and an In Motion mode; and wherein
a trigger programmed to move the digital license plate from the SLEEP mode to the ON mode in response to a detecting a wireless connection to a mobile phone.