In-vehicle device and driving trajectory projection method

A driving trajectory projection method adapted to an in-vehicle device, wherein the in-vehicle device is adapted to be disposed on a first vehicle, and the driving trajectory projection method comprises:

• receiving a turn signal information of the first vehicle, wherein the turn signal information is selected from a left-turn instruction, a right-turn instruction, or a straight-driving instruction;
• performing a projection step to project a suggestion driving trajectory in response to that the turn signal information is the left-turn instruction or the right-turn instruction, wherein the projection step comprises:
• receiving a first driving speed of the first vehicle;
• capturing a driving frame upon the first vehicle drives in a first lane, wherein the driving frame comprises an image of a second vehicle, the second vehicle drives in a second lane and drives behind the first vehicle, wherein the second lane is at a left side of the first lane or a right side of the first lane;
• calculating a second driving speed of the second vehicle and a first distance between the first vehicle and the second vehicle according to the image of the second vehicle;
• and
• projecting the suggestion driving trajectory on the second lane, wherein the suggestion driving trajectory is selected from a historical driving trajectory or a system driving trajectory;
• and
• stopping projecting the suggestion driving trajectory in response to that the turn signal information is the straight driving instruction;
• wherein, the historical driving trajectory is stored in a storage module.

An in-vehicle device adapted to be disposed on a first vehicle, wherein the in-vehicle device comprises:

• at least one projection module configured to project a remind driving trajectory;
• a communication module configured to receive a gear information, a driving environment information, and a steering wheel information of the first vehicle, wherein the gear information is selected from a parking gear, a neutral gear, a driving gear, or a reverse gear;
• at least one camera module configured to continuously capture the driving environment information of the first vehicle along a capturing direction of the at least one camera module;
• and
• a processing module electrically connected to the at least one projection module, the communication module, and the at least one camera module, wherein the processing module is configured to calculate the reminding driving trajectory according to the gear information, the driving environment information and the steering wheel information;
• wherein, in response to that the gear information is the driving gear, the processing module controls the at least one projection module to project the reminding driving trajectory on a ground surface in front of the first vehicle;
• in response to that the gear information is the reverse gear, the processing module controls the at least one projection module to project the reminding driving trajectory on a ground surface behind the first vehicle;
• in response to that the gear information is the parking gear or the neutral gear, the processing module controls the at least one projection module to stop projecting the reminding driving trajectory;
• wherein the reminding driving trajectory comprises at least one straight-line trajectory;
• and
• wherein the steering wheel information comprises an angle value, the angle value is within an angle range, and the angle range has a minimum value, a first middle value, a second middle value, and a maximum value;
• in response to that the angle value is between the minimum value and the first middle value, the at least one straight-line trajectory is offset from a straight-line forward direction of the first vehicle by a first offset angle or is offset from a straight-line backward direction of the first vehicle by a second offset angle;
• in response to that the angle value is between the first middle value and the second middle value, the at least one straight-line trajectory is parallel with a direction of a vehicle body length of the first vehicle;
• and
• in response to that the angle value is between the second middle value and the maximum value, the at least one straight-line trajectory is offset from the straight-line forward direction by another first offset angle or is offset from the straight-line backward direction by another second offset angle.

A driving trajectory projection method adapted to an in-vehicle device, wherein the in-vehicle device is adapted to be disposed on a first vehicle, and the driving trajectory projection method comprises:

• receiving a gear information, a driving environment information and a first driving speed of the first vehicle, wherein the gear information is selected from a parking gear, a neutral gear, a driving gear, or a reverse gear;
• performing a projection step to project a remind driving trajectory in response to that the gear information is the driving gear and the reverse gear and the first driving speed meets a preset condition, wherein the projection step comprises:
• receiving a steering wheel information of the first vehicle;
• projecting the reminding driving trajectory on a ground surface in front of the first vehicle in response to that the gear information is the driving gear and the first driving speed meets the preset condition;
• and
• projecting the reminding driving trajectory on a ground surface behind the first vehicle in response to that the gear information is the reverse gear and the first driving speed meets the preset condition;
• stopping projecting the reminding driving trajectory in response to that the gear information is the parking gear and the neutral gear;
• wherein the reminding driving trajectory comprises at least one straight-line trajectory;
• wherein the steering wheel information comprises an angle value, the angle value is within an angle range, and the angle range has a minimum value, a first middle value, a second middle value, and a maximum value;
• in response to that the angle value is between the minimum value and the first middle value, the at least one straight-line trajectory is offset from a straight-line forward direction of the first vehicle by a first offset angle or is offset from a straight-line backward direction of the first vehicle by a second offset angle;
• in response to that the angle value is between the first middle value and the second middle value, the at least one straight-line trajectory is parallel with a direction for a body length of the first vehicle;
• and
• in response to that the angle value is between the second middle value and the maximum value, the at least one straight-line trajectory is offset from the straight-line forward direction by another first offset angle or is offset from the straight-line backward direction by another second offset angle.