Display device for a vehicle

Abstract

Display device (10) for a vehicle (5), wherein the display device (10) draws a display of a predetermined shape on a road surface on one side of a traveling direction by illuminating light on the road surface when a user performs a direction-changing operation, which is an operation for changing the traveling direction of a vehicle (5), and a drawing operation on the road surface is prohibited when a hazard warning switch (14) is in an ON state, characterized in that the change of direction operation is a switching-on operation of a direction switch (13), and the prohibition of the signaling process on the roadway is terminated when the direction switch (13) is set to the ON state while the vehicle (5) is moving or starting to move.

Description

TECHNICAL FIELDThe present invention relates to a display device for a vehicle that draws a display of a predetermined shape on a road surface on a side of a traveling direction by lighting light on the road surface when a user performs a traveling direction changing operation, which is an operation for changing the traveling direction of a vehicle.BACKGROUNDA display device for a vehicle may draw a display of a predetermined shape by lighting light on a road surface. For example, WO 2021 / 006 217 A1 discloses a display device for a vehicle in which, when a turn signal switch (a flasher) is put in an ON state, a lamp on the side of the turn signal of the vehicle is blinked and a display of a predetermined shape is drawn on the road surface by irradiating light to the road surface in a manner connected to the lamp. A display device for a vehicle according to the preamble of the independent claims is the subject of JP 2003-159 986 A.In some cases, an electronic circuit of the lamp is connected to a hazard warning switch. In these cases, the display of the predetermined shape can be drawn on the road surface by irradiating light to the road surface in association with the blinking of the lamps on both sides of the vehicle in response to the hazard lamp switch being switched to the ON state during a period in which the vehicle is stopped. In these cases, there is a possibility that pedestrians or the like may mispreceive in the environment that the vehicle starts, which leads to possible confusion of pedestrians or the like.An advantage of the present invention is to provide a display device for a vehicle that does not cause confusion in pedestrians or the like in the environment.SUMMARYAccording to an aspect of the present invention, there is provided a display device for a vehicle, wherein the display device draws a display of a predetermined shape on a road surface on a side of a traveling direction by lighting light on the road surface when a user performs a traveling direction changing operation which is an operation for changing the traveling direction of the vehicle, and a drawing operation on the road surface is prohibited when a hazard lamp switch is placed in an ON state.According to an aspect of the present invention, the turning operation is an on operation of a turn signal switch, and the prohibition of the drawing operation on the road surface is ended when the turn signal switch is placed in the ON state while the vehicle is running or starts running.According to another aspect of the present invention, the turning operation is a steering operation, and the prohibition of the drawing operation on the road surface is ended when the vehicle is steered while the vehicle is running or starts running.According to another aspect of the present invention, it is desirable that in the display device for the vehicle, the drawing operation on the road surface is not performed even when the turning operation is performed when the hazard switch is placed in the ON state during a period in which the vehicle is stopped.According to the display device for the vehicle of one aspect of the present invention, the display is not drawn on the road surface in a manner associated with the flasher lamp, and confusion of pedestrians or the like in the environment can be prevented.BRIEF DESCRIPTION OF THE DRAWINGSThe embodiment(s) of the present invention will be described with reference to the following figures, in which: FIG. 1 is a schematic diagram showing a vehicle including a display device for a vehicle according to an embodiment of the present invention; FIG. 2 is a block diagram showing a structure of the display device for a vehicle according to the embodiment of the present invention; FIG. 3 is a flowchart showing the flow of display by the display device for a vehicle according to an embodiment of the present invention; FIG. 4 is a flowchart showing the flow of display during travel by the display device for a vehicle according to another embodiment of the present invention; FIG. 5 is a flowchart showing the flow of display during the stop of the vehicle by the display device for a vehicle according to another embodiment of the present invention; FIG. 6 is a schematic diagram showing an example display; FIG. 7 is a schematic diagram showing another example display; FIG. 8 is a schematic diagram showing another example display; and FIG. 9 is a schematic diagram showing another example display.DESCRIPTION OF EMBODIMENTSAn embodiment of the present invention will now be described in detail. In the following description, a specific shape, a specific material, a specific direction, a specific numerical value, and the like are merely exemplary to facilitate understanding of the present invention, and the details may be appropriately changed depending on the use, the object, the specification, or the like.(Vehicle)A vehicle 5 including a display device 10 according to an embodiment of the present invention will now be described with reference to FIG. 1.The vehicle 5 includes the display device 10, the details of which will be described below. The vehicle 5 is an engine-driven vehicle having four wheels, but is not limited to such a vehicle. The vehicle 5 may be, for example, an electrically driven vehicle or a hybrid electric vehicle.[Display Device]The display device 10 of the embodiment of the present invention will now be described with reference to FIGS. 1 to 3.The display device 10, serving as a display device for a vehicle, draws a display of a predetermined shape on a road surface on a side of a traveling direction by illuminating the road surface with a sign lamp 12 when a user performs a traveling direction changing operation, which is an operation for changing the traveling direction of the vehicle 5. Examples of the turning operation are a turning operation of a turn signal switch 13 and detection of a steering angle of a predetermined angle or more by a steering angle sensor 15.As described later in detail, according to the display device 10, a drawing operation is performed on the road surface in a manner not associated with a flash lamp 11, and confusion of pedestrians or the like in the environment can be prevented.As shown in FIG. 1, the display device 10 has the flash lamp 11 provided on both left and right sides of the vehicle 5 and the sign lamp 12 provided on both left and right sides of the vehicle 5, and that draws a display of a predetermined shape by projecting light onto the road surface.The display device 10 additionally includes the turn signal switch 13 for making the flash lamp 11 blink on the side of the turn signal when the turn signal of the vehicle 5 is changed, a hazard signal switch 14 for making the flash lamps 11 blink on both sides of the vehicle 5, the steering angle sensor 15 for detecting a steering angle of a steering wheel, and an in-vehicle CAN (Controller Area Network) 16 for transmitting a vehicle speed (see FIG. 2 ).The display device 10 further includes an ECU (Electronic Control Unit) 20 for controlling the turning on and off of various switches 36 to 39 of a display circuit 30, which will be described below, on the basis of turning on and off operations of the travel direction switch 13 and / or the hazard lamp switch 14 and the display circuit 30 including the flash lamps 11 and the sign lamps 12 (see FIG. 2 ).The flasher lamp 11 is a signal lamp indicating a change in the traveling direction of the vehicle 5 by flashing. The flasher lamp 11 also serves as a hazard warning system by causing all flashers 11 to blink simultaneously.As described above, the flasher lamp 11 is mounted on both left and right sides of the vehicle 5. Moreover, the flasher lamp 11 is mounted on the front and rear sides of the vehicle 5, respectively. In the present embodiment, a configuration in which a total of four flash lamps 11 are provided on the front and rear sides as well as on the left and right sides of the vehicle 5 is exemplified, but the present invention is not limited to such a configuration. For example, the flash lamps 11 may be additionally attached to the outside mirrors on the left and right sides or on the left and right sides of the side parts of the vehicle 5.As described above, the sign lamp 12 is provided on both left and right sides of the vehicle 5, and draws the display of the predetermined shape on the road surface by projecting light on the road surface. In the present embodiment, the sign lamp 12 is provided in the vicinity of the respective flash lamp 11 and on an outer side of the flash lamp 11, but the present invention is not limited to such a configuration.The drawing lamp 12 includes, for example, a semiconductor light emitting element such as an LED, a first lens for projecting light emitted from the semiconductor light emitting element onto a projection screen, and a second lens for drawing the display by directing an image of a predetermined shape on the projection screen onto the road surface. On the screen, a transparent area corresponding to the predetermined shape to be drawn on the road surface can be formed from the beginning. Alternatively, a configuration similar to that of a transmissive liquid crystal in which light of different patterns is transmitted by selectively driving a plurality of elements arranged in a matrix form may be used.In the present embodiment, as the predetermined shape drawn by the drawing lamp 12, a figure in which a plurality of V shapes are combined with an acute angle portion pointing in the traveling direction is shown, but the present invention is not limited to such a configuration. It is sufficient that a shape indicating the traveling direction is displayed on the road surface.As described above, the turn signal switch 13 causes the turn signal lamp 11 on the side of the turn signal to blink when the turn signal of the vehicle 5 is changed. The turn signal switch 13 is the so-called turn signal indicator and is located on the left or right side of a steering column. The travel switch 13 is a rotatable lever. When the turn signal switch 13 is switched to the ON state by being turned to the left side, the flash lamp 11 on the left side is blinked, and when the turn signal switch 13 is switched to the ON state by being turned to the right side, the flash lamp 11 on the right side is blinked.As described above, the hazard lamp switch 14 causes all the hazard lamps 11 to blink. The hazard light switch 14 is a push button switch disposed between the driver and passenger seats.As illustrated in FIG. 2, the display circuit 30 includes a relay circuit 31 in which a flasher relay 35 periodically connected to and disconnected from a power supply (not illustrated) is provided, a left side display circuit 32 in which the flasher lamp 11 on the left side and the sign lamp 12 on the left side are connected in parallel with each other, a right side display circuit 33 in which the flasher lamp 11 on the right side and the sign lamp 12 on the right side are connected in parallel with each other, and a both side display circuit 34 connected to the left side display circuit 32 and the right side display circuit 33.The switch 36 is provided between the relay circuit 31 and the left-side (left) and right-side (right) display circuits 32 and 33. The switch 36 can be switched between a left ON state in which the relay circuit 31 is connected to the left display circuit 32, a right ON state in which the relay circuit 31 is connected to the right display circuit 33, and an OFF state in which the relay circuit 31 is connected to neither the left nor right display circuits 32 and 33.The switch 36 is controlled and controlled in conjunction with a state of the travel direction switch 13. When the travel direction switch 13 is turned to the ON state to the left, the switch 36 is turned to the left ON state, and the left side display circuit 32 is supplied with power. Similarly, the switch 36 is switched to the right ON state when the heading switch 13 is switched to the ON state to the right, and the right display circuit 33 is supplied with power. On the other hand, the switch 36 is switched to the OFF state when the heading switch 13 is switched to the OFF state.The both-side display circuit 34 connects the relay circuit 31 and the left and right display circuits 32 and 33 by bypassing the switch 36. The switch 37 is controlled and controlled in conjunction with the state of the hazard warning light 14. When the hazard lamp switch 14 is set to the ON state, the switch 37 is turned ON and both the left and right display circuits 32 and 33 are energized. On the other hand, the switch 37 is switched to the OFF state when the hazard warning switch 14 is switched to the OFF state.As described above, in the left display circuit 32, the flash lamp 11 and the sign lamp 12 are connected in parallel with each other. Moreover, on a line where the sign lamp 12 is provided, the switch 38 is provided. When the switch 38 is set to the ON state, the sign lamp 12 and the flasher lamp 11 are lit in complete synchronization. The right display circuit 33 is similarly constructed and includes the switch 39. the switches 38 and 39 are turned off when the drawing operation on the road surface is prohibited.The ECU 20 controls the switch 36 based on an operation of the travel direction switch 13, and controls the switch 37 based on an operation of the hazard lamp switch 14 to control the flashing or lighting of the flashing lamps 11.In addition to controlling the switches 36 and 37, the ECU 20 controls the switches 38 and 39 based on the heading switch 13, the hazard warning switch 14, the steering angle, and the vehicle speed to control the drawing operation by the drawing lamp 12.The ECU 20 has a CPU (Central Processing Unit) that is a computation processor and memory units such as a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and performs signal processing according to a program stored in the ROM in advance while utilizing a temporary storage function of the RAM.As illustrated in FIG. 2, the ECU 20 is connected to the travel direction switch 13, the hazard lamp switch 14, the steering angle sensor 15, the in-vehicle CAN 16, and the switches 36 to 39 of the display circuit 30, receives inputs of ON / OFF manipulation signals of the travel direction switch 13 and the hazard lamp switch 14, and outputs ON / OFF control signals to the switches 36 to 39 of the display circuit 30.Example displays drawn on the road surface according to an embodiment of the present invention will now be described. All display patterns of the flasher lamp 11 and the sign lamps 12 will be described later with reference to FIGS. 4 and 5.To illustrate the example displays, reference is made as appropriate to Figures 6 to 9. FIG. 6 shows a state in which the flash lamp 11 is extinguished and the drawing operation on the road surface is not performed. FIG. 7 shows a state in which the turning signal lamp 11 on the side of the traveling direction is blinked and the drawing operation is performed on the road surface on the side of the traveling direction. FIG. 8 shows a state in which the flash lamps 11 blink on both sides and the drawing operation on the road surface is not performed. FIG. 9 shows a state in which the flash lamps 11 on both sides are blinked and the drawing operation is performed on the road surface on the traveling direction side.The ECU 20 prohibits the drawing operation on the road surface by the drawing lamp 12 when the hazard lamp 14 is set to the ON state (e.g., an example shown in FIG. 8 ). Specifically, the ECU 20 follows the flow of display shown in FIG. 3.As shown in FIG. 3, when the ECU 20 determines that the travel direction switch 13 is set to the ON state, the flow proceeds to step S 12. On the other hand, when the ECU 20 determines that the travel direction switch 13 is placed in the OFF state, the processing proceeds to S 15.When the ECU 20 determines in step S 12 that the hazard lamp switch 14 is set to the ON state, the processing proceeds to step S 13, and when the ECU 20 determines that the hazard lamp switch 14 is set to the OFF state, the processing proceeds to step S 14.In step S 13, the ECU 20 switches the switch 36 in the traveling direction side display circuit 30 to the ON state and switches the switch 37 to the ON state, thereby connecting the relay circuit 31 and the both-side display circuit 34, and switches the switches 38 and 39 to the OFF state. With this process, the flash lamps 11 on both sides are blinked while the drawing operation on the road surface by the drawing lamp 12 is not performed (see FIG. 8 ). That is, when the heading switch 13 and the hazard lamp switch 14 are both in the ON state, the ECU 20 does not cause the sign lamp 12 to perform the sign operation on the road surface.In step S 14, the ECU 20 switches the switch 36 in the traveling direction side display circuit 30 to the ON state to thereby connect the relay circuit 31 and the traveling direction side display circuit, switches the switch 37 to the OFF state, and switches one of the switches 38 and 39, which is respectively on the traveling direction side, to the ON state. With this process, the drawing lamp 12 on the traveling direction side performs the drawing operation on the road surface, and the blinking lamp 11 on the traveling direction side is blinked (see FIG. 7 ). That is, when the heading switch 13 is set to the ON state but the hazard lamp switch 14 is set to the OFF state, the ECU 20 causes the sign lamp 12 to perform the sign operation on the road surface.When the ECU 20 determines in step S 15 that the hazard lamp switch 14 is set to the ON state, the processing proceeds to step S 16, and when the ECU 20 determines that the hazard lamp switch 14 is set to the OFF state, the processing proceeds to step S 11.In step S 16, the ECU 20 switches the switch 36 in the display circuit 30 to the OFF state and switches the switch 37 to the ON state, thereby connecting the relay circuit 31 and the both-side display circuit 34, and switches the switches 38 and 39 to the OFF state. With this process, the flash lamps 11 on both sides are blinked while the drawing operation on the road surface by the drawing lamp 12 is not performed (see FIG. 8 ). That is, when the heading switch 13 is set to the ON state and the hazard lamp switch 14 is set to the ON state, the ECU 20 does not cause the sign lamp 12 to perform the sign operation on the road surface.In this way, when the hazard lamp switch 14 is set to the ON state, the drawing operation on the road surface is always prohibited, and therefore, the drawing operation on the road surface is not performed in a manner connected to the hazard lamp 11, and confusion of pedestrians or the like in the environment can be prevented.Next, another embodiment of the present invention will be described. In the example flow of FIG. 3, the drawing operation on the road surface is prohibited whenever the hazard lamp switch 14 is set to the ON state. Alternatively, as shown in FIGS. 4 and 5, the prohibition of the drawing operation on the road surface may be canceled under certain conditions. In the example processes of FIGS. 4 and 5, the drawing process on the road surface is performed even when the hazard lamp switch 14 is placed in the ON state, when the turn signal switch 13 is placed in the ON state, or when a steering process is performed while the vehicle 5 is running or running.On the other hand, when the vehicle 5 is stopped and the hazard switch 14 is set in the ON state, the drawing operation on the road surface is prohibited. Therefore, the ECU 20 does not cause the sign lamp 12 to execute the sign operation on the road surface even when the travel direction switch 13 is placed in the ON state, when the hazard warning switch 14 is placed in the ON state while the vehicle 5 is stationary (when a vehicle speed transmitted from the in-vehicle CAN is less than a predetermined speed).More specifically, in the display circuit 30, the switch 36 on the traveling direction side is switched to the ON state so that the relay circuit 31 and the traveling direction side display circuit are connected to each other, the switch 37 is switched to the ON state, and the switches 38 and 39 are set to the OFF state. With this method, the flash lamps 11 on both sides are blinked while the drawing operation on the road surface is not performed by the drawing lamp 12 (see FIG. 8 ; an operation similar to step S 33 to be described below).Further, as described above, the ECU 20 terminates prohibition of the drawing operation on the road surface by the sign lamp 12 even when the hazard lamp switch 14 is placed in the ON state when the travel direction switch 13 is placed in the ON state while the vehicle 5 is traveling or starting to travel (when the vehicle speed transmitted from the in-vehicle CAN 16 is greater than or equal to the predetermined speed).More specifically, in the display circuit 30, the switch 36 on the traveling direction side is switched to the ON state, and the switch 37 is switched to the ON state, so that the relay circuit 31 and the both-side display circuit 34 are connected to each other, and a switch of the switches 38 and 39 on the traveling direction side is switched to the ON state, so that the sign lamp 12 on the traveling direction side is connected. With this process, the sign lamp 12 on the traveling direction side performs the sign operation on the road surface, and the flash lamps 11 on both sides are blinked (see FIG. 9 ; an operation similar to step S 24 to be described below).In the present embodiment, a configuration is used in which whether the vehicle 5 is traveling or starts to travel is recognized based on the vehicle speed transmitted from the in-vehicle CAN 16, but the present invention is not limited to such a configuration. Thus, for example, it can be detected on the basis of the position of the shift lever in a D range that the vehicle 5 is driving or begins to drive.Moreover, the ECU 20 stops the sign operation on the road surface from being prohibited by the sign lamp 12 even when the hazard lamp switch 14 is placed in the ON state when a steering angle detected by the steering angle sensor 15 is equal to or greater than a predetermined angle while the vehicle 5 is running or starting to run.More specifically, in the display circuit 30, the switch 36 is set to the OFF state and the switch 37 is set to the ON state so that the relay circuit 31 and the both-side display circuit 34 are connected to each other, and a switch among the switches 38 and 39 on the traveling direction side is set to the ON state so that the sign lamp 12 on the traveling direction side is connected. With this process, the sign lamp 12 on the traveling direction side performs the sign operation on the road surface, and the flash lamps 11 on both sides are blinked (see FIG. 9 ; an operation similar to step S 28 to be described below).In this way, even when the hazard switch 14 is set to the ON state, when the user performs the turning operation while the vehicle 5 is traveling or starts to travel, the prohibition of the drawing operation is ended, and an intention of the turning operation of the vehicle 5 can be notified to other vehicles or the like in the environment.(Example Display)Referring now to FIGS. 4 and 5, the operations of display by the ECU 20 will be described.As shown in FIG. 4, when the vehicle speed transmitted from the in-vehicle CAN 16 is equal to or greater than a predetermined vehicle speed, the ECU 20 determines that the vehicle 5 is traveling or starts traveling in step S 21, and the processing proceeds to S 22. When the vehicle speed is less than the predetermined speed, the ECU 20 determines that the vehicle 5 is stationary, and the processing proceeds to step S 31 (see FIG. 5 ).[Travel or Start of Travel]In step S 22, when the ECU 20 determines that the travel direction switch 13 is placed in the ON state, the processing proceeds to step S 23, and when the ECU 20 determines that the travel direction switch 13 is placed in the OFF state, the processing proceeds to step S 26.When the ECU 20 determines in step S 23 that the hazard lamp switch 14 is placed in the ON state, the processing proceeds to step S 24, and when the ECU 20 determines that the hazard lamp switch 14 is placed in the OFF state, the processing proceeds to step S 25.In step S 24, the ECU 20 switches the switch 36 in the traveling direction side display circuit 30 to the ON state, and switches the switch 37 to the ON state, thereby connecting the relay circuit 31 and the both-side display circuit 34 to each other, and switches a switch of the traveling direction side switches 38 and 39 to the ON state, so that the sign lamp 12 on the traveling direction side is connected. With this process, the drawing lamp 12 on the traveling direction side performs the drawing operation on the road surface, and the flash lamps 11 on both sides are blinked (see FIG. 9 ).In step S 25, the ECU 20 switches the switch 36 in the traveling direction side display circuit 30 to the ON state to connect the relay circuit 31 and the traveling direction side display circuit to each other, switches the switch 37 to the OFF state, and switches a switch from the traveling direction side switches 38 and 39 to the ON state, so that the sign lamp 12 on the traveling direction side is connected. With this process, the drawing lamp 12 on the traveling direction side performs the drawing operation on the road surface, and the blinking lamp 11 on the traveling direction side is blinked (see FIG. 7 ).In step S 26, when the ECU 20 determines that the hazard switch 14 is set to the ON state, the processing proceeds to step S 27, and when the ECU 20 determines that the hazard switch 14 is set to the OFF state, the processing proceeds to step S 21.In step S 27, when the steering angle detected by the steering angle sensor 15 is equal to or greater than a predetermined angle, the ECU 20 determines that the vehicle 5 is being steered, and the processing proceeds to step S 28. When the steering angle is less than the predetermined angle, the ECU 20 determines that the vehicle 5 is not being steered, and the processing proceeds to step S 29.In step S 28, the ECU 20 switches the switch 36 in the display circuit 30 to the OFF state and switches the switch 37 to the ON state to thereby connect the relay circuit 31 and the both-side display circuit 34 to each other, and switches a switch of the switches 38 and 39 on the traveling direction side to the ON state so that the sign lamp 12 on the traveling direction side is connected. With this process, the sign lamp 12 on the traveling direction side performs the sign operation on the road surface, and the flash lamps 11 on both sides are blinked (see FIG. 9 ).In step S 29, the ECU 20 switches the switch 36 in the display circuit 30 to the OFF state and switches the switch 37 to the ON state, thereby connecting the relay circuit 31 and the both-side display circuit 34 to each other, and switches the switches 38 and 39 to the OFF state. With this process, the flash lamps 11 on both sides are blinked while the drawing operation on the road surface is not performed by the drawing lamp 12 (see FIG. 8 ).When the determination in step S 26 is NO, the ECU 20 switches the switch 36 in the display circuit 30 to the OFF state and switches the switch 37 to the OFF state to disconnect the relay circuit 31 and the both-side display circuit 34 from each other, and switches the switches 38 and 39 to the OFF state. With this process, the drawing operation on the road surface is not performed, and the flash lamp 11 is not illuminated (see FIG. 6 ).[Stopped State]As shown in FIG. 5, in step S 31, when the ECU 20 determines that the travel direction switch 13 is set to the ON state, the process proceeds to step S 32, and when the ECU 20 determines that the travel direction switch 13 is set to the OFF state, the process proceeds to step S 35.When the ECU 20 determines in step S 32 that the hazard lamp switch 14 is set to the ON state, the processing proceeds to step S 33, and when the ECU 20 determines that the hazard lamp switch 14 is set to the OFF state, the processing proceeds to step S 34.In step S 33, the ECU 20 switches the switch 36 in the traveling direction side display circuit 30 to the ON state, and switches the switch 37 to the ON state, thereby connecting the relay circuit 31 and the both-side display circuit 34 to each other, and switches the switches 38 and 39 to the OFF state. With this process, the flash lamps 11 on both sides are blinked while the drawing operation on the road surface is not performed by the drawing lamp 12 (see FIG. 8 ).In step S 34, the ECU 20 switches the switch 36 in the traveling direction side display circuit 30 to the ON state to connect the relay circuit 31 and the traveling direction side display circuit to each other, switches the switch 37 to the OFF state, and switches a switch from the traveling direction side switches 38 and 39 to the ON state. With this process, the drawing lamp 12 on the traveling direction side performs the drawing operation on the road surface, and the blinking lamp 11 on the traveling direction side is blinked (see FIG. 7 ).In step S 35, when the ECU 20 determines that the hazard switch 14 is set to the ON state, the processing proceeds to step S 36, and when the ECU 20 determines that the hazard switch 14 is set to the OFF state, the processing proceeds to step S 21.In step S 36, the ECU 20 switches the switch 36 in the display circuit 30 to the OFF state, and switches the switch 37 to the ON state, thereby connecting the relay circuit 31 and the both-side display circuit 34 to each other, and switches the switches 38 and 39 to the OFF state. With this process, the flash lamps 11 on both sides are blinked while the drawing operation on the road surface is not performed by the drawing lamp 12 (see FIG. 8 ).When the determination in step S 35 is NO, the ECU 20 switches the switch 36 in the display circuit 30 to the OFF state and switches the switch 37 to the OFF state to disconnect the relay circuit 31 and the both-side display circuit 34 from each other, and switches the switches 38 and 39 to the OFF state. With this process, the drawing operation on the road surface is not performed, and the flash lamp 11 is not illuminated (see FIG. 6 ).

Claims

A display device (10) for a vehicle (5), the display device (10) draws a display of a predetermined shape on a road surface on a side of a traveling direction by lighting light on the road surface when a user performs a traveling direction changing operation which is an operation for changing the traveling direction of a vehicle (5) and a drawing operation on the road surface is prohibited when a hazard lamp switch (14) is placed in an ON state, characterized in that the traveling direction changing operation is an ON operation of a traveling direction switch (13), and prohibition of the drawing operation on the road is ended when the traveling direction switch (13) is placed in the ON state while the vehicle (5) is traveling or starts traveling.A display device (10) for a vehicle (5), the display device (10) draws a display of a predetermined shape on a road surface on a side of a traveling direction by lighting light on the road surface when a user performs a traveling direction changing operation which is an operation for changing the traveling direction of a vehicle (5) and a drawing operation on the road surface is prohibited when a hazard switch (14) is set in an ON state, characterized in that the traveling direction changing operation is a steering operation, and prohibition of the drawing operation on the road surface is finished when the vehicle (5) is steered while the vehicle is traveling or starting traveling.The display device (10) for the vehicle (5) according to claim 1 or 2, wherein the drawing operation on the road surface is not performed even when the turning direction operation is performed when the hazard lamp switch (14) is placed in the ON state during a period in which the vehicle (5) is stopped.

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