Apparatus and method for rear communication display

1 . A rear communication display device comprising:

an information display optical system configured to output rear communication display information to a rear glass, a trunk garnish or both, which are disposed at a rear of a vehicle; and

a controller configured to determine a display mode for outputting the rear communication display information and control the information display optical system to output the rear communication display information corresponding to the determined display mode,

wherein the determined display mode is one of a plurality of display modes including:

a manual mode in which the rear communication display information is output through a user operation, and

an automatic mode in which the rear communication display information is output based on a driving situation determined from navigation and camera information, and wherein the information display optical system includes:

a first optical system module disposed at a portion of the vehicle where a top end portion of the rear glass meets a roof of the vehicle and configured to output the rear communication display information to a first area of the rear glass;

a second optical system module disposed in an interior of the vehicle and configured to output the rear communication display information to a second area of the rear glass; and

a third optical system module disposed within the trunk garnish and configured to project the rear communication display information to an exterior surface of the trunk garnish.

2 . The rear communication display device of claim 1 , wherein:

the controller is configured, in response to determining that the display mode is the manual mode, to control the information display optical system to display a signal transmitted by the vehicle on the rear glass, the trunk garnish, or both, and

the rear communication display information in the manual mode includes at least one of directional information, deceleration information, stop information, and reverse information.

3 . The rear communication display device of claim 1 , wherein:

the controller is configured, in response to determining that the display mode is the automatic mode, configured to control the information display optical system to display, on the rear glass, the trunk garnish, or both, road condition information and emergency situation information obtained from the driving situation of the vehicle, and

the emergency situation information includes at least one of accident information and congestion information.

4 . The rear communication display device of claim 1 , wherein a portion of the third optical system module is configured to protrude outwardly from the trunk garnish and project the rear communication display information on the exterior surface of the trunk garnish.

5 . A rear communication display device comprising:

an information display optical system configured to output rear communication display information to a rear glass, a trunk garnish or both, which are disposed at a rear of a vehicle; and

a controller configured to determine a display mode for outputting the rear communication display information and control the information display optical system to output the rear communication display information corresponding to the determined display mode,

wherein the determined display mode is one of a plurality of display modes including:

a manual mode in which the rear communication display information is output through a user operation, and

an automatic mode in which the rear communication display information is output based on a driving situation determined from navigation and camera information, wherein the information display optical system includes:

a first optical system module disposed at a portion of the vehicle where a top end portion of the rear glass meets a roof of the vehicle and configured to output the rear communication display information to a first area of the rear glass;

a second optical system module disposed in an interior of the vehicle and configured to output the rear communication display information to a second area of the rear glass; and

a third optical system module disposed within the trunk garnish and configured to output the rear communication display information to a surface of the trunk garnish,

wherein the trunk garnish includes a fixed portion and a rotating portion,

wherein the third optical system module is disposed on a rear surface of the fixed portion,

wherein the rotating portion has a rotation shaft disposed at an end thereof and configured to rotate in an inward direction of the vehicle when a motor coupled to the rotation shaft is turned on, and

wherein the third optical system module displays the rear communication display information on a front surface of the rotating portion.

6 . A method for displaying rear communication display information on a vehicle, comprising:

determining a display mode for outputting the rear communication display information; and

outputting the rear communication display information corresponding to the determined display mode, on a rear glass, a trunk garnish or both, which are disposed at a rear of the vehicle;

wherein the determined display mode is one of a plurality of display modes including:

a manual mode in which the rear communication display information is output through a user operation; and

an automatic mode in which the rear communication display information is output by determining a driving situation based on navigation and camera information, and

wherein outputting the rear communication display information corresponding to the determined display mode comprises:

outputting, using a first optical system module disposed at a portion of the vehicle where a top end portion of the rear glass meets a roof of the vehicle, the rear communication display information to a first area of the rear glass;

outputting, using a second optical system module disposed in an interior of the vehicle, the rear communication display information to a second area of the rear glass; and

projecting, using a third optical system module disposed within the trunk garnish, the rear communication display information to an exterior surface of the trunk garnish.

7 . The method of claim 6 , wherein:

outputting the rear communication display information corresponding to the determined display mode comprises, in response to determining that the display mode is the manual mode, displaying a signal transmitted by the vehicle on the rear glass, the trunk garnish, or both, and

the rear communication display information in the manual mode includes at least one of directional information, deceleration information, stop information, and reverse information.

8 . The method of claim 6 , wherein:

outputting the rear communication display information corresponding to the determined display mode comprises, in response to determining that the display mode is the automatic mode, displaying, on at least one of the rear glass, the trunk garnish, or both, at least one of road condition information and emergency situation information obtained from a driving situation of the vehicle, and

the emergency situation information includes at least one of accident information and congestion information.

9 . The method of claim 6 , wherein the rear communication display information includes (1) an image shape including at least one of a pictogram and an emoticon, or (2) text of a preset length.