Display system for a vehicle

Abstract

A display system (12) of a vehicle is provided with a display (21) arranged in the vehicle, a display CTL (70) that supplies display data to the display, a display power relay (40) that switches on and off the supply of power to the display, a CTL power relay (50) that switches on and off the supply of power to the display CTL, an instruction acceptance section (37), and a power controller (60) that controls the display power relay and the CTL power relay. The power controller is configured to bring the display power relay and the CTL power relay to on to set the display system to a display mode, and when an off instruction is accepted from the instruction acceptance section in the display mode, bring the display power relay to off, and on the other hand, maintain the on state of the CTL power relay to set the display system to a sleep mode in which the supply of power to the display is turned off while the supply of power to the display CTL is maintained.

Description

[0001] This application claims priority to online application No. 2022-046246 filed in Japan on March 23, 2022, and all of its contents, including the description, claims, abstract and drawings, are incorporated herein by reference. Technical Field

[0002] This disclosure relates to display systems for vehicles, and more particularly to power control of displays and display controllers mounted in vehicles. Background Technology

[0003] Buses and similar vehicles are equipped with LED displays on the front, rear, and / or sides of the vehicle. The vehicle operates when these LED displays show the route name, destination, stops, etc. Additionally, some such vehicles also have displays (e.g., LCD screens) inside the passenger compartment that show all stops, etc.

[0004] The display system installed in vehicles such as dedicated bus lines consists of a display and a display controller that supplies display data to the display. Furthermore, the power supply to the display system is controlled by a power switch located indoors and the vehicle's ignition switch.

[0005] Patent Document 1 discloses a technology that, when a vehicle is placed with the ignition power on, cuts off its power supply under certain conditions to prevent the battery from being depleted.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2009-101778

[0007] Regarding display systems installed in vehicles, there are instances where power to the display system is cut off due to operation by a vehicle occupant. In such cases, when power to the display system is restored through operation by the vehicle occupant on the display, there is a time delay before the image is displayed on the display because the display controller undergoes a startup process. Summary of the Invention

[0008] The purpose of this disclosure is to display an image quickly on a display when a vehicle occupant performs an operation that displays an image on the display.

[0009] The display system of the vehicle according to the present disclosure is characterized by including a display configured to be provided on an outer surface of the vehicle or inside a passenger compartment; a display controller configured to supply display data to the display; a display power supply relay configured to switch on and off a power supply to the display; a controller power supply relay configured to switch on and off a power supply to the display controller; an instruction receiving unit configured to receive an instruction to switch on and off the display power supply relay from an occupant of the vehicle; and a power supply controller configured to control the display power supply relay and the controller power supply relay, wherein the power supply controller is configured to switch the display system to a display mode in which the display controller and the display are supplied with power by switching the controller power supply relay from off to on at a predetermined timing and switching the display power supply relay from off to on at a timing at which an instruction to switch on is received from the instruction receiving unit, and switch the display system to a sleep mode in which power is supplied to the display controller while the power supply to the display is cut off by maintaining the controller power supply relay in the on state when an instruction to switch off is received from the instruction receiving unit in the display mode, and switch the display power supply relay from on to off.

[0010] In the display system of the vehicle according to the present disclosure, the power supply controller can be configured to switch the display system to the sleep mode by switching the display power supply relay from on to off when a predetermined time elapses from a timing at which a switch from on to off of an ignition switch of the vehicle is detected in the display mode.

[0011] In the display system of the vehicle according to the present disclosure, the power supply controller can be configured to switch the display system to the display mode again by switching the display power supply relay from off to on when an instruction to switch on is received from the instruction receiving unit in the sleep mode.

[0012] In the display system of the vehicle according to the present disclosure, the power supply controller can be configured to switch the controller power supply relay from on to off when a lock of a door of the vehicle by a key is detected by a lock detection unit.

[0013] In the display system of the vehicle according to the present disclosure, the power supply controller can be configured to switch the controller power supply relay from off to on when an unlock of the door of the vehicle by the key is detected by an unlock detection unit.

[0014] The display system of the vehicle according to the present disclosure can be configured such that the indication accepting section is a push-down button provided in the interior of the vehicle, and the power controller is configured to accept, as the turning-on indication of the display power relay, the pressing of the push-down button in a state where the display power relay is turned off, and accept, as the turning-off indication of the display power relay, the pressing of the push-down button in a state where the display power relay is turned on.

[0015] The display system of the vehicle according to the present disclosure can be configured such that the indication accepting section is an ignition switch of the vehicle, and the power controller is configured to accept, as the turning-on indication of the display power relay, a change from off to on of the ignition switch, and accept, as the turning-off indication of the display power relay, a change from on to off of the ignition switch.

[0016] According to the present disclosure, since the power supply to the display controller is maintained in the sleep mode of the display system, when the indication accepting section accepts, from an occupant of the vehicle, an indication of turning on the display power relay (an indication of displaying an image on the display) in this mode, the image is promptly displayed on the display. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of a vehicle according to an embodiment.

[0018] Figure 2 is a functional block diagram of a display system of a vehicle according to an embodiment.

[0019] Figure 3 is a state transition diagram of a controller power supply.

[0020] Figure 4 is a state transition diagram of a display power supply.

[0021] Figure 5 is a state transition diagram of a display controller.

[0022] Figure 6A is a time chart showing an example of state changes of a display controller and a display.

[0023] Figure 6B is a time chart showing another example of state changes of a display controller and a display.

[0024] Figure 7 is a state transition diagram of a display power supply in a display system of a vehicle according to another embodiment.

[0025] Figure 8is a time chart of an example of a state change of a display controller and a display in a display system of a vehicle according to another embodiment. DETAILED DESCRIPTION

[0026] Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings. The structure described below is an example for explanation, and can be appropriately changed according to the specifications of the vehicle and the like. In addition, in the following, in the case of including a plurality of embodiments, modifications, and the like, it is assumed from the beginning that the characteristic portions thereof are appropriately used in combination. The same reference numerals are attached to the same elements in all the drawings, and the repeated explanation is omitted.

[0027] Figure 1 is a perspective view of a vehicle 10 according to an embodiment. In the same drawing, the direction of an arrow FR indicates the front of the vehicle, the direction of an arrow UP indicates the upper of the vehicle, and the direction of an arrow LH indicates the left of the vehicle. In addition, in the same drawing, a display 21I disposed in the cabin and a display 21R disposed on the rear surface of the vehicle are extracted and illustrated, and their disposition places are illustrated with dotted arrows.

[0028] The vehicle 10 is an automobile having a substantially rectangular parallelepiped shape and capable of automatic driving. Specifically, the vehicle 10 is capable of driving in a plurality of driving modes including an automatic driving mode and a manual driving mode. The vehicle 10 is an electric automobile with a non-illustrated rotary motor as a drive source. A battery that supplies electric power to the rotary motor is mounted on the vehicle 10. In addition, as another embodiment, the vehicle 10 can be an automobile with an internal combustion engine as a drive source.

[0029] The vehicle 10 is used as a shuttle for a plurality of unspecified passengers to be shared. A passenger drop-off port 28 is provided on the side portion of the vehicle 10. The passenger drop-off port 28 is substantially at the center in the vehicle front-rear direction and is closed by a door 30 when the vehicle is running. The door 30 is a sliding door, and the front side door 30 moves to the front and the rear side door 30 moves to the rear, whereby the passenger drop-off port 28 is opened.

[0030] The vehicle 10 is provided with a door button 32 disposed on the outer surface of the door 30. By pressing the door button 32 in the closed state of the door 30, the door 30 is opened. In addition, by pressing the door button 32 in the opened state of the door 30, the door 30 is closed.

[0031] As Figure 1As shown, the display 21F is disposed on the front surface of the vehicle, the display 21R is disposed on the rear surface of the vehicle, the display 21S is disposed on the side surface of the vehicle, and the display 21I is disposed in the vehicle cabin. The display 21F on the front surface of the vehicle is disposed on the lower side of the front windshield, the display 21R on the rear surface of the vehicle is disposed on the lower side of the rear glass (not shown), the display 21S on the side surface of the vehicle is disposed on the outer surface on the upper side of the sliding door 30, and the display 21I in the vehicle cabin is disposed on the inner wall near the ceiling on the right side of the vehicle.

[0032] The displays 21F, 21R, and 21S disposed on the outer surface of the vehicle are LED displays, and the display 21I disposed in the vehicle cabin is a liquid crystal display. Furthermore, the LED display is a display in which a plurality of LED elements are arranged in a matrix and in which characters, symbols, and the like are displayed by selectively lighting the plurality of LED elements. Furthermore, the structure of each of the displays 21F, 21R, 21S, and 21I is not limited to the above-described displays, and as each of the displays, an LED display, a liquid crystal display, an organic EL display, or the like can be selectively used.

[0033] The displays 21F, 21R, and 21S disposed on the outer surface of the vehicle display the route number, the route name, the destination, and representative stop (bus stop) of the route on which the vehicle 10 travels, and the like. In addition, the display 21I disposed in the vehicle cabin displays all of the stops (bus stops) at which the vehicle stops, and the like.

[0034] Figure 2 is a functional block diagram of the display system 12 of the vehicle according to the embodiment (display system 12 mounted on the vehicle). The display system 12 includes the displays 21F, 21R, 21S, and 21I, a display controller 70, a display power relay 40, a controller (CTL) power relay 50, a power controller 60, an unlock / lock detection unit 36, a push button 37 (instruction acceptance unit), an IG switch 38 (ignition switch), and a battery 34. Hereinafter, in the case where it is not necessary to distinguish the displays 21F, 21R, 21S, and 21I, they are described as the display 21. In addition, the controller is appropriately described as CTL. Hereinafter, the CTL power refers to the controller power, and the CTL power relay refers to the controller power relay. In addition, the display CTL refers to the display controller.

[0035] The display controller 70 supplies the display data 76 to each display 21. The display controller 70 has a processor 71 having a CPU, and a storage 72. The storage 72 is, for example, a RAM, a ROM, a flash memory, or the like. The control program 73, the control data 74, the route information 75, and a plurality of display data 76 are stored in the storage 72. The route information 75 is information about a route on which the vehicle 10 runs, and includes, for example, a route number, a route name, a destination, and a stop (a bus stop). The processor 71 operates in accordance with the control program 73 and the control data 74 stored in the storage 72. The processor 71 generates a plurality of display data 76 using the route information 75, and supplies them to each display 21.

[0036] The display power supply relay 40 is a mechanical relay. The display power supply relay 40 has a coil 42, and a switch 41 movable by the coil 42. Both terminals of the coil 42 are connected to the power supply controller 60. An input terminal 43 of the switch 41 is connected to the battery 34, and an output terminal 45 of the switch 41 is connected to each display 21 and the display controller 70. The output terminal 45 of the switch 41 functions as a display power supply 45, and supplies power to each display 21. Further, the display power supply 45 is connected to the display controller 70, but does not supply power to the display controller 70, and the display controller 70 monitors the on-off of the display power supply 45 to control itself.

[0037] The CTL power supply relay 50 is a mechanical relay. The CTL power supply relay 50 has a coil 52, and a switch 51 movable by the coil 52. Both terminals of the coil 52 are connected to the power supply controller 60. An input terminal 53 of the switch 51 is connected to the battery 34, and an output terminal 55 of the switch 51 is connected to the display controller 70. The output terminal 55 of the switch 51 functions as a CTL power supply 55, and supplies power to the display controller 70.

[0038] The power supply controller 60 controls the display power supply relay 40 (the switch 41) and the CTL power supply relay 50 (the switch 51). The power supply controller 60 controls the on-off of the switch 41 by controlling the current flowing to the coil 42 of the display power supply relay 40, and controls the on-off of the switch 51 by controlling the current flowing to the coil 52 of the CTL power supply relay 50. The power supply controller 60 has a processor 61 having a CPU, and a storage 62. The storage 62 is, for example, a RAM, a ROM, a flash memory, or the like. The control program 63 and the control data 64 are stored in the storage 62. The processor 61 operates in accordance with the control program 63 and the control data 64 stored in the storage 62.

[0039] The unlocking / locking detection section 36 (hereinafter, also simply referred to as the detection section 36) detects unlocking and locking of the door 30 by the key of the vehicle 10. For example, unlocking or locking of the door 30 is performed by inserting and turning the key carried by the attendant of the vehicle 10 into the key hole (not shown) provided in the vehicle 10. In addition, unlocking or locking of the door 30 is performed by receiving a wave from the smart key carried by the attendant by the key wave receiver (not shown) mounted on the vehicle 10. Specifically, when the unlocking button or the locking button provided in the smart key is pressed, the key wave receiver receives the wave output from the smart key, whereby unlocking or locking of the door 30 is performed. In addition, when the operation of opening the door 30 (pressing of the door button 32) is performed in a state where the wave of the smart key is received by the key wave receiver, unlocking of the door 30 is performed. In addition, when the operation of closing the door 30 (pressing of the door button 32) is performed in a state where the wave of the smart key is received by the key wave receiver, locking of the door 30 is performed when the wave of the smart key is not received by the key wave receiver and a certain time elapses. The mode of unlocking or locking of the door 30 by the key of the vehicle 10 is various. The detection section 36 can be, for example, a sensor that detects the mechanical action of the lock portion of the door 30 or the key wave receiver mounted on the vehicle 10. In addition, the detection section 36 can be, for example, a detection system configured to include the key wave receiver and the door button 32. The mode of the detection section 36 is not limited as long as unlocking or locking of the door 30 by the key can be detected. The detection section 36 is electrically connected to the power supply controller 60.

[0040] The push-down button 37 is an instruction receiving section that receives an instruction of on / off of the display power supply relay 40 (switch 41). The push-down button 37 is provided in the vicinity of the driver's seat in the room and is operated by the attendant of the vehicle 10. In addition, the push-down button 37 can be the power button of the navigation·system of the vehicle 10. That is, it is also possible to switch on / off of the display power supply relay 40 (switch 41) in association with pressing of the power button of the navigation·system (to turn on the display power supply 45 when the power of the navigation·system is turned on, and to turn off the display power supply 45 when the power of the navigation·system is turned off). The push-down button 37 is electrically connected to the power supply controller 60.

[0041] The ignition switch 38 (hereinafter, described as the IG switch 38) of the vehicle 10 is electrically connected to the power supply controller 60. Information of on / off of the IG switch 38 is input to the power supply controller 60.

[0042] The battery 34 is mounted on the vehicle 10 and is electrically connected to the input terminal 43 of the display power supply relay 40, the input terminal 53 of the CTL power supply relay 51, and the power supply controller 60. The battery 34 supplies electric power to the display system 12.

[0043] Figure 3 is a state transition diagram of the CTL power supply 55 (CTL power supply relay 50). When the CTL power supply 55 is in the off state (switch 51: open) and the unlock / lock detection section 36 detects the unlocking of the door 30, the power supply controller 60 causes the CTL power supply 55 to be in the on state (switch 51: closed). Also, when the CTL power supply 55 is in the on state (switch 51: closed) and the unlock / lock detection section 36 detects the locking of the door 30, the power supply controller 60 causes the CTL power supply 55 to be in the off state (switch 51: open).

[0044] Figure 4 is a state transition diagram of the display power supply 45 (display power supply relay 40). When the display power supply 45 is in the off state (switch 41: open) and the depression of the push button 37 is detected, the power supply controller 60 causes the display power supply 45 to be in the on state (switch 41: closed). Also, when the display power supply 45 is in the on state (switch 41: closed) and the depression of the push button 37 is detected, the power supply controller 60 causes the display power supply 45 to be in the off state (switch 41: open). Also, when the display power supply 45 is in the on state and a predetermined time elapses after the detection of the switching from the on to the off of the IG switch 38, the power supply controller 60 causes the display power supply 45 to be in the off state. The control of the IG switch 38 for the display power supply 45 is to prevent the situation where the battery is depleted due to the forgetfulness of the attendant to cause the display power supply 45 to be in the off state.

[0045] Figure 5 is a state transition diagram of the display controller 70. Among the states of the display controller 70, there are an off state (Sl), an on state (S2), a sleep state (S3), and a display state (S4). When the CTL power supply 55 is off, the display controller 70 is in the off state (Sl). If the CTL power supply 55 is turned on in the off state (Sl), the display controller 70 transitions to the on state (S2). In the on state (S2), the display controller 70 reads in the control program 73 and the control data 74 to perform the on processing. Further, the on processing includes, for example, processing of generating a plurality of display data 76 (data in the form of a bitmap) using the route information 75.

[0046] Also, if the on processing is completed in the on state (S2), the display controller 70 transitions to the sleep state (S3). In the sleep state (S3), the display controller 70 suppresses the power consumption of the display controller 70 by stopping the driving of a part or all of the clock signals in the processor 71.

[0047] Further, if the display power source 45 is turned on by the attendant of the vehicle pressing the push button 37 in the sleep state (S3), the display controller 70 shifts to a display state (S4). In the display state (S4), the display controller 70 restarts driving of the clock signal stopped in the sleep state (S3), and supplies the plurality of display data 76 stored in the storage section 72 to each display 21. Thus, each display 21 receives the display data 76, and displays an image according to the display data 76.

[0048] Further, if the display power source 45 is turned off in the display state (S4), the display controller 70 shifts to the sleep state (S3) again. The display controller 70 shifts between the sleep state (S3) and the display state (S4) by turning on and off the display power source 45. Further, if the CTL power source 55 is turned off in the sleep state (S3), the display controller 70 returns to the power-off state (S1).

[0049] Figure 6A is a time chart showing an example of the state transition of the display controller 70 and the displays 21. As shown in Figure 6A at time tO, the vehicle 10 is parked at a parking lot or the like. At this time, both the CTL power source 55 and the display power source 45 are turned off, the display controller 70 is in the power-off state, and the displays 21 are turned off.

[0050] At time tl, the attendant of the vehicle 10 unlocks the lock of the door 30 of the vehicle 10 with a key, and gets on the vehicle 10. At this time, the unlocking and locking detection section 36 detects the unlocking, and the power controller 60 changes the CTL power source 55 (CTL power source relay 50) from off to on. Thus, the display controller 70 shifts from the power-off state to the start state, and performs a start process in the display controller 70.

[0051] At time t2, the IG switch 38 is turned on. Further, at time t3, the start process in the display controller 70 is completed, and the display controller 70 shifts to the sleep state.

[0052] At time t4, the push button 37 is pressed by the attendant. The power controller 60 detects the pressing of the push button 37, and changes the display power source 45 (display power source relay 40) from off to on. Thus, the display system 12 shifts to a display mode in which power is supplied to both the display controller 70 and the displays 21. The display controller 70 shifts to the display state, and the displays 21 display images.

[0053] In this embodiment, the display controller 70 shifts to the display state (S4) at the timing at which the unlocking of the door 30 of the vehicle 10 is detected (the timing at which the attendant gets on the vehicle 10 is detected, Figure 6AThe CTL power supply 55 (CTL power supply relay 50) is turned on to start the startup processing of the display controller 70, so that the images can be displayed on the displays 21 quickly when the attendant presses the push-down button 37 (when the display power supply 45 is turned on).

[0054] The vehicle 10 is operated between the period t4 to t5. Further, at the time t5, the push-down button 37 is pressed by the attendant. The power supply controller 60 detects the pressing of the push-down button 37, and turns the display power supply 45 (display power supply relay 40) from on to off. Thus, the display system 12 becomes the sleep mode in which the power supply to the displays 21 is turned off while the power supply to the display controller 70 is maintained. The display controller 70 becomes the sleep state, and the displays 21 are turned off.

[0055] In the sleep mode of the display system 12, the power supply to the display controller 70 is maintained, so that in this mode, the images can be displayed on the displays 21 quickly when the attendant presses the push-down button 37 again (when the display power supply 45 is turned on). When the display power supply 45 is turned on in the sleep mode, the display system 12 is turned to the display mode again. The display system 12 is turned between the sleep mode and the display mode by the on / off of the display power supply 45.

[0056] At the time t6, the IG switch 38 is turned off. Further, at the time t7, the attendant gets off the vehicle 10, and locks the door 30 with the key of the vehicle 10. At this time, the lock / unlock detector 36 detects the locking, and the power supply controller 60 turns the CTL power supply 55 (CTL power supply relay 50) from off to on. Thus, the display controller 70 is turned from the sleep state to the shutdown state.

[0057] Figure 6B is a time chart showing another example of the state changes of the display controller 70 and the displays 21. From tO to t4, Figure 6B is the same operation as Figure 6A , and the operation after t4 is different from Figure 6A . The case where the attendant forgets to turn the display power supply 45 off by the push-down button 37 after operating the vehicle 10 is shown in Figure 6B

[0058] As shown in Figure 6B , at the time t4, the push-down button 37 is pressed by the attendant, and the display power supply 45 is turned from off to on. Thus, the display system 12 becomes the display mode, the display controller 70 becomes the display state, and the displays 21 display the images.

[0059] ​Further, after the operation of the vehicle 10 is performed, the attendant forgets to make the display power supply 45 off, and at time t6, the IG switch 38 is switched from on to off. The power supply controller 60 detects the switching of the IG switch 38 from on to off, and measures the elapsed time from the time (t6) of the detection of the switching with a timer. Further, after the elapsed time reaches a predetermined time TP (at time t61), the power supply controller 60 switches the display power supply 45 (the display power supply relay 40) from on to off. Thereby, the display system 12 becomes the sleep mode, the display controller 70 becomes the sleep state, and the display of each display 21 becomes off. Note that the predetermined time TP can be stored in advance in the storage section 62 of the power supply controller 60. Figure 6B Figure 6B

[0060] Thus, the power supply controller 60 automatically makes the display power supply 45 off, and therefore, even in the case where the attendant forgets to make the display power supply 45 off, the battery can be prevented from being depleted. Figure 6B The operation of the display system after time t61 is the same as the operation of the display system after time t6. Figure 6A

[0061] Next, the display system of the vehicle of another embodiment will be described. Figure 7 is a state transition diagram of the display power supply 45 in the other embodiment, Figure 8 is a time chart showing an example of the state changes of the display controller 70 and the display 21 in the other embodiment. The other embodiment differs from the above-described embodiment in the control of the display power supply 45 by the power supply controller 60, and is the same structure in other respects. The other embodiment uses the IG switch 38 as the instruction receiving section that receives the instruction of the on / off of the display power supply 45 (the display power supply relay 40).

[0062] As shown in Figure 7 , when the display power supply 45 is in the off state (the switch 41: open) and the change of the IG switch 38 from off to on is detected, the power supply controller 60 makes the display power supply 45 in the on state (the switch 41: closed). Further, when the display power supply 45 is in the on state (the switch 41: closed) and the change of the IG switch 38 from on to off is detected, the power supply controller 60 makes the display power supply 45 in the off state (the switch 41: open).

[0063] Figure 8 t0 to tl are the same operation as Figure 6A , and the operation after tl is different from Figure 6A . As Figure 8 ​​​As shown, at time tl, the unlocking / locking detection section 36 detects unlocking of the door 30, and the power controller 60 changes the CTL power supply 55 (CTL power supply relay 50) from off to on. Thereby, the display controller 70 shifts from the power-off state to the power-on state, and the power-on processing is performed by the display controller 70.

[0064] At time t2, the power-on processing is completed by the display controller 70, and the display controller 70 shifts to the sleep state.

[0065] At time t3, the IG switch 38 is turned on by the attendant. The power controller 60 detects the on of the IG switch 38, and changes the display power supply 45 (display power supply relay 40) from off to on. Thereby, the display system 12 shifts to the display mode in which both the display controller 70 and the displays 21 are supplied with power. The display controller 70 shifts to the display state, and each of the displays 21 displays an image.

[0066] Between times t3 and t4, the vehicle 10 is operated. Also, at time t4, the IG switch 38 is turned off by the attendant. The power controller 60 detects the off of the IG switch 38, and changes the display power supply 45 (display power supply relay 40) from on to off. Thereby, the display system 12 shifts to the sleep mode in which the power supply to the displays 21 is cut off while the power supply to the display controller 70 is maintained. The display controller 70 shifts to the sleep state, and the display of each of the displays 21 is turned off. Figure 8 The operation of the display system after time t4 is the same as that of Figure 6A The operation of the display system after time t6 is the same as that of

[0067] According to another embodiment described above, the on / off of the display power supply 45 is changed in conjunction with the on / off of the IG switch 38, and therefore, compared with a mode in which the on / off of the display power supply 45 is switched by depressing the button 37 in addition to the operation of the IG switch 38, the attendant can be relieved of the trouble of operating the display system.

[0068] Further, in each of the embodiments described above, only the display power supply 45 is input to each of the displays 21. However, a mode in which the controller power supply 55 is also input to each of the displays 21 so that a part of the display 21 (for example, a memory or the like in the display 21 that temporarily stores the display data 76) is supplied with power from the controller power supply 55 can also be adopted.

Claims

1. A display system of a vehicle characterized by comprising: a display configured on an outer surface of the vehicle or inside a passenger compartment; a display controller that generates display data using route information related to a route on which the vehicle is running, and supplies the display data to the display; a display power supply relay that switches on and off of power supply to the display; a controller power supply relay that switches on and off of power supply to the display controller; an instruction acceptance section that accepts an instruction of on and off of the display power supply relay from an occupant of the vehicle; a power supply controller that controls the display power supply relay and the controller power supply relay; and a lock detection section that detects unlocking of a door of the vehicle by a key, the power supply controller is configured to: switch the controller power supply relay from off to on at a timing when the unlocking of the door is detected by the lock detection section, thereby starting power supply to the display controller and starting processing of generation of the display data by the display controller, the power supply controller is configured to: switch the display power supply relay from off to on at a timing when an on instruction is accepted from the instruction acceptance section after the controller power supply relay is switched from off to on, thereby setting the display system to a display mode in which power supply to both the display controller and the display is performed and the generated display data is supplied to the display, when an off instruction is accepted from the instruction acceptance section in the display mode, switch the display power supply relay from on to off, on the other hand, maintain the on state of the controller power supply relay, thereby setting the display system to a sleep mode in which power supply to the display is cut off while power supply to the display controller is maintained.

2. The display system of the vehicle according to claim 1, characterized in that: the power supply controller is configured to: when a switch of an ignition switch of the vehicle from on to off is detected in the display mode, switch the display power supply relay from on to off at a predetermined time after the detection, thereby making the display system the sleep mode.

3. The display system of the vehicle according to claim 1, characterized in that: the power supply controller is configured to: when an on instruction is accepted from the instruction acceptance section in the sleep mode, switch the display power supply relay from off to on, thereby making the display system the display mode again.

4. The display system of the vehicle according to claim 1, characterized by further comprising a lock detection section that detects locking of a door of the vehicle by a key, the power supply controller switches the controller power supply relay from on to off when locking of the door is detected by the lock detection section.

5. The display system of the vehicle according to any one of claims 1 to 4, characterized in that: the instruction acceptance section is a push-down button configured inside the vehicle, the power supply controller is configured to: ​ ​ ​ when the pressing of the push button is detected in a state where the display power supply relay is off, accepting this as an indication of turning on of the display power supply relay, when the pressing of the push button is detected in a state where the display power supply relay is on, accepting this as an indication of turning off of the display power supply relay.

6. The display system of a vehicle according to any one of claims 1 to 4, characterized in that the indication accepting portion is an ignition switch of the vehicle, the power supply controller is configured to: upon detecting a change from off to on of the ignition switch, accept this as an indication of turning on of the display power supply relay, upon detecting a change from on to off of the ignition switch, accept this as an indication of turning off of the display power supply relay.

Images