Vehicle-mounted display device

Abstract

The invention relates to an in-vehicle display device. The vehicle-mounted display device displays the dividing lines of the road on the display of the vehicle. The vehicle-mounted display device is provided with: an acquisition unit that acquires camera division line information including information about the position of a division line, and map division line information including information about the position of the division line; and a display control unit that displays the dividing lines. The display control unit fades out the division line based on the camera division line information and then fades in the division line based on the map division line information.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a vehicle-mounted display device that displays a division line of a road on a display of a vehicle. BACKGROUND

[0002] For example, Patent Literature 1 describes a device that detects a division line on a road where a vehicle exists, and displays the detected division line on a display mounted on the vehicle. The device changes the length of the division line displayed on the display based on the detection distance of a detection unit (sensor) that detects the division line.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2020-163903

[0006] In a device that displays a division line as described above, sometimes a division line based on the recognition result of a camera is displayed on a display, or a division line based on map information is displayed on a display. When the information source of such a division line is switched, the position of the division line displayed on the display can shift before and after the switching. As a result, the occupant who observes the display can sometimes feel a sense of discomfort. SUMMARY

[0007] Therefore, the present disclosure describes a vehicle-mounted display device that can switch the information source for displaying a division line while suppressing the occupant from feeling a sense of discomfort.

[0008] One aspect of the present disclosure is a vehicle-mounted display device that displays a division line of a road on a display of a vehicle, the vehicle-mounted display device including: an acquisition unit that acquires first division line information that includes information on the position of the division line and second division line information that includes information on the position of the division line and is different from the first division line information; and a display control unit that performs display of the division line based on the first division line information and display of the division line based on the second division line information as display of the division line in the display, the display control unit performing the following actions in a case where the display of the division line based on the first division line information is switched to the display of the division line based on the second division line information: displaying the division line based on the second division line information after fading out the division line based on the first division line information; or fading in the division line based on the second division line information after eliminating the division line based on the first division line information; or fading in the division line based on the second division line information after fading out the division line based on the first division line information.

[0009] Here, for example, the position of the division line based on the first division line information and the position of the division line based on the second division line information sometimes shift from each other (slightly shift). In this case, when the display of the division line based on the first division line information is switched to the display of the division line based on the second division line information, the position of the division line displayed on the display can differ before and after the switching. Therefore, the in-vehicle display device performs at least one of fading in the division line when the division line is displayed and fading out the division line when the division line is eliminated in a case where the display of the division line based on the first division line information is switched to the display of the division line based on the second division line information. That is, the in-vehicle display device does not instantaneously switch the display of the division line in a case where the information source of the division line is switched. In a case where the display of the division line is instantaneously switched without using the fading in and the fading out, the division line sometimes suddenly disappears, the division line suddenly appears at a position different from the position where the division line disappears, and the occupant sometimes feels a sense of strangeness. Thus, the in-vehicle display device can switch the information source for displaying the division line while suppressing the occupant from feeling the sense of strangeness by using at least one of the fading in and the fading out.

[0010] Another aspect of the present disclosure is an in-vehicle display device that displays a division line of a road on a display of a vehicle, the in-vehicle display device including: an acquisition unit that acquires first division line information including information of a position of the division line and second division line information including information of the position of the division line and different from the first division line information; and a display control unit that performs display of the division line based on the first division line information as display of the division line in the display and display of the division line based on the second division line information, the display control unit causing the division line to gradually change from a position of the division line being displayed based on the first division line information to a position of the division line that should be displayed based on the second division line information in a case where the display of the division line based on the first division line information is switched to the display of the division line based on the second division line information.

[0011] The in-vehicle display device causes the division line to gradually change to the position of the division line that should be displayed based on the second division line information in a case where the display of the division line based on the first division line information is switched to the display of the division line based on the second division line information. That is, the in-vehicle display device does not instantaneously switch the position of the division line displayed on the display in a case where the information source of the division line is switched. In a case where the display position of the division line is instantaneously switched, the division line sometimes suddenly disappears, the division line suddenly appears at a position different from the position where the division line disappears, and the occupant sometimes feels a sense of strangeness. Thus, the in-vehicle display device can switch the information source for displaying the division line while suppressing the occupant from feeling the sense of strangeness by causing the division line to gradually change to the position of the division line that should be displayed based on the second division line information after the display is switched.

[0012] In the above-described in-vehicle display device, the first division line information can include information on a position of a division line of a subject lane in which the vehicle is traveling, and the second division line information can include information on a position of a division line of the subject lane and information on a position of a division line of an adjacent lane that is adjacent to the subject lane. The display control section can, in a case where the display of the division line is switched from being based on the first division line information to being based on the second division line information, cause the division line of the subject lane to transition from the position of the division line of the subject lane that is being displayed based on the first division line information to the position of the division line of the subject lane that should be displayed based on the second division line information, and after the transition is completed, display the division line of the adjacent lane at the position of the division line of the adjacent lane based on the second division line information.

[0013] For example, in a case where the information sources of the division lines are different, there can be a shift in the positions of the division lines displayed based on the information sources. Therefore, in a case where the division lines of the subject lane and the division lines of the adjacent lane are displayed in combination with the information sources of the division lines of the subject lane and the division lines of the adjacent lane being different from each other, there can be a display in which the division lines cross each other or the lanes are wide or narrow. Therefore, the in-vehicle display device displays the division lines of the adjacent lane based on the second division line information after the display of the division lines of the subject lane is switched to the display of the division lines of the subject lane based on the second division line information. That is, the in-vehicle display device can display the division lines of the adjacent lane in a state where the information sources of the division lines of the subject lane and the information sources of the division lines of the adjacent lane are the same (the second division line information). Thus, even in a case where the division lines of the adjacent lane are newly displayed in addition to the division lines of the subject lane, the in-vehicle display device can suppress a sense of strangeness of the occupant.

[0014] In the above-described in-vehicle display device, the display control section can, after the display of the division line is switched from being based on the second division line information to being based on the first division line information, in a case where the display of the division line is again switched from being based on the first division line information to being based on the second division line information within a predetermined determination time, after causing the division line of the subject lane to gradually transition from the position of the division line of the subject lane that is being displayed based on the first division line information to the position of the division line of the subject lane that should be displayed based on the second division line information, not display the division line of the adjacent lane at the position of the division line of the adjacent lane based on the second division line information until a predetermined display standby time elapses.

[0015] For example, the display of the division line is sometimes switched in the order of the display based on the second division line information, the display based on the first division line information, and the display based on the second division line information. In the case of the display based on the first division line information, the division line of the own lane is displayed, and in the case of the display based on the second division line information, the division line of the adjacent lane is displayed in addition to the own lane. In this case, the division line of the adjacent lane disappears when the display based on the first division line information is performed, and then the division line of the adjacent lane is displayed again when the display based on the second division line information is performed. Therefore, in the in-vehicle display device, the display of the division line of the adjacent lane is not performed until the prescribed display standby time elapses when the display based on the second division line information is performed again. Thus, the in-vehicle display device can suppress the division line of the adjacent lane from disappearing and then being displayed again in a short time, and can suppress the occupant from feeling a sense of strangeness.

[0016] In the above-described in-vehicle display device, the display control portion can not perform switching between the display of the division line based on the first division line information and the display of the division line based on the second division line information during a period until a prescribed switching standby time elapses after the switching between the display of the division line based on the first division line information and the display of the division line based on the second division line information is performed. In this case, the in-vehicle display device can suppress switching of the information source of the division line, and can suppress the occupant from feeling that the switching of the display is troublesome.

[0017] Effects of Invention

[0018] According to one aspect of the present disclosure, it is possible to switch the information source for displaying the division line while suppressing a sense of strangeness of the occupant. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a block diagram showing one example of an in-vehicle display device of the first embodiment.

[0020] Figure 2 is a plan view showing a road on which the host vehicle is traveling.

[0021] Figure 3 is a diagram showing one example of a display image of a division line in a display.

[0022] Figure 4 is a diagram showing one example of a display image of a division line based on camera division line information in a display.

[0023] Figure 5 is a diagram showing one example of a display image of a division line based on map division line information in a display.

[0024] Figure 6 is a block diagram showing one example of an in-vehicle display device of the second embodiment.

[0025] Figure 7 Fig. 1 is a diagram showing an example of a display image of a division line in a display based on camera division line information.

[0026] Figure 8 Fig. 2 is a diagram showing an example of a display image of a division line in a display based on map division line information.

[0027] Figure 9 Fig. 3 is a diagram for explaining a case where a division line is displayed so as to be gradually transitioned.

[0028] Figure 10 Fig. 4 is a diagram showing an example of a display image of a division line in a display based on camera division line information.

[0029] Figure 11 Fig. 5 is a diagram showing an example of a display image of a division line in a display based on map division line information. DETAILED DESCRIPTION

[0030] Hereinafter, exemplary embodiments will be described with reference to the drawings. Note that in each drawing, the same or equivalent elements are denoted by the same reference numerals, and repetitive explanation is omitted.

[0031] (First Embodiment)

[0032] A first embodiment of a vehicle-mounted display device will be described. Figure 1 The vehicle-mounted display device 100 illustrated in the figure is mounted on a vehicle (hereinafter referred to as the host vehicle) such as a passenger car and a truck, and performs image display corresponding to the situation around the host vehicle. The vehicle-mounted display device 100 displays a division line of a road (a division line for dividing a lane provided on a road) as an image displayed corresponding to the situation around the host vehicle, on a display 4. The vehicle-mounted display device 100 is provided with an ECU (Electronic Control Unit) 10 that centrally manages the device. The ECU 10 is an electronic control unit having a CPU (Central Processing Unit) and a storage portion. The storage portion is constituted by, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), or the like. In the ECU 10, various functions are realized, for example, by the CPU executing a program stored in the storage portion. The ECU 10 can also be constituted by a plurality of electronic units.

[0033] The ECU 10 is connected with a camera 1, a GPS receiving section 2, a map database 3, and a display 4. The camera 1 is an imaging device that images an outside situation of the host vehicle. The camera 1 is provided, for example, on an inner side of a front window glass of the host vehicle, and images a front of the host vehicle. The camera 1 transmits an imaged image relating to the outside situation of the host vehicle to the ECU 10. In the present embodiment, the camera 1 can image a road in front of the host vehicle. The GPS receiving section 2 measures a position (for example, latitude and longitude of the host vehicle) of the host vehicle by receiving signals from three or more GPS (Global Positioning System) satellites. The GPS receiving section 2 transmits the measured position information of the host vehicle to the ECU 10.

[0034] The map database 3 is a database that stores map information. The map database 3 is provided, for example, in a storage section mounted on the host vehicle. The map information includes, for example, position information (position on a map) of a road (lane), information of a road shape (lane shape) (for example, a category of a curve, a category of a straight portion, a curvature of a curve, and the like), and position information of a road structure, and the like. Note that the map database 3 can be stored in a server that can communicate with the host vehicle. In the present embodiment, the map information stored in the map database 3 includes "map division line information (second division line information)" as information relating to a division line. The map division line information includes information of a position of a division line. Further, in a case where a plurality of lanes exist in a road, the map division line information includes information of positions of a plurality of division lines for distinguishing the lanes. The map division line information is not limited to be determined for an entire region. The map division line information can be determined for only a part of a region.

[0035] The display 4 is a display device provided in a passenger compartment of the host vehicle. The display 4 can be a center display, can be a MID (Multi Information Display), or can be a HUD (Head Up Display). The display 4 displays various information in response to a control signal from the ECU 10.

[0036] The ECU 10 functionally includes a vehicle position recognition unit 11, a dividing line recognition unit 12, an acquisition unit 13, and a display control unit 14. The vehicle position recognition unit 11 recognizes the position of the vehicle. The vehicle position recognition unit 11 can recognize the position of the vehicle based on the position information measured by the GPS receiving unit 2. Alternatively, the vehicle position recognition unit 11 may use the position information of fixed obstacles such as utility poles contained in the map information of the map database 3 and the detection results of radar installed in the vehicle to identify the position of the vehicle through the well-known SLAM (Simultaneous Localization and Mapping) technology.

[0037] The dividing line recognition unit 12 recognizes the position of the dividing line in front of the vehicle based on the image captured by the camera 1. For example, the dividing line recognition unit 12 uses a well-known image processing technology to extract the dividing line based on the captured image, and recognizes the position of the dividing line relative to the vehicle. The dividing line recognition unit 12 can also recognize each position on the dividing line. It should be noted that the dividing line recognition unit 12 can also recognize the absolute position of the dividing line represented by latitude and longitude, etc. as the position of the dividing line. Hereinafter, the information on the position of the dividing line recognized by the dividing line recognition unit 12 based on the image captured by the camera 1 is referred to as "camera dividing line information (first dividing line information)".

[0038] It should be noted that if Figure 2 As shown, for example, assume that a vehicle V is traveling in lane L, and an adjacent lane L10 exists to the right of lane L. Lane L is defined by a pair of dividing lines K1 and K2, while adjacent lane L10 is defined by a pair of dividing lines K1 and K10. That is, dividing line K1 is the dividing line on the right side of lane L and also the dividing line on the left side of adjacent lane L10.

[0039] In this embodiment, the dividing line of the own lane refers to the pair of dividing lines (the left dividing line and the right dividing line) that constitute the own lane. The dividing line of the adjacent lane adjacent to the own lane refers to the dividing line of the pair of dividing lines that constitute the adjacent lane that does not also function as the dividing line of the own lane. Figure 2 In the example shown, the dividing lines of the own lane are dividing line K1 and dividing line K2, and the dividing line of the adjacent lane L10 is dividing line K10.

[0040] The dividing line recognition unit 12 identifies the dividing line of the host lane based on the image captured by the camera 1. Furthermore, if the road on which the host vehicle is traveling has multiple lanes, the dividing line recognition unit 12 also identifies the dividing line of the adjacent lane based on the image captured by the camera 1 in addition to the dividing line of the host lane. However, depending on the driving positions of other vehicles around the host vehicle and the road shape, the dividing line of the adjacent lane may not be captured by the camera 1 (making it difficult to capture). Therefore, even when there are multiple lanes, the dividing line recognition unit 12 may only recognize the dividing line of the host lane.

[0041] The acquisition unit 13 acquires the camera dividing line information identified by the dividing line identification unit 12 and the map dividing line information stored in the map database 3. The map dividing line information is different from the camera dividing line information. Here, the difference between the map dividing line information and the camera dividing line information may be a difference in the information source when identifying (setting) the position of the dividing line, a difference in the method when identifying (setting) the position of the dividing line, or a difference in the accuracy of the position of the dividing line. As described above, the camera dividing line information is identified based on the image captured by the camera 1 mounted on the vehicle. The map dividing line information stored in the map database 3 is pre-set information. Therefore, the map dividing line information and the camera dividing line information are different from each other.

[0042] The display control unit 14 controls the display of dividing lines on the display 4. The display control unit 14 displays dividing lines based on the camera dividing line information acquired by the acquisition unit 13 or based on the map dividing line information acquired by the acquisition unit 13 as dividing lines on the display 4. Here, the display control unit 14 displays either the dividing lines based on the camera dividing line information or the dividing lines based on the map dividing line information. When displaying dividing lines based on the map dividing line information, the display control unit 14 may determine the dividing lines of the area to be displayed based on the vehicle's position information identified by the vehicle position recognition unit 11 and the dividing line position information included in the map dividing line information.

[0043] In this embodiment, if Figure 3 As shown, the display control unit 14 causes the display 4 to display the dividing line KA and the vehicle icon VA representing the vehicle. The display control unit 14 displays the vehicle icon VA and the dividing line KA so that the vehicle and the dividing line appear as if viewed from behind and diagonally above the vehicle. Displaying the dividing line KA on the display 4 causes the display 4 to display an image (e.g., a line) corresponding to the dividing line.

[0044] The display control portion 14 displays the division line at the position of the display 4 corresponding to the position of the division line of the camera division line information, as the display of the division line based on the camera division line information. Specifically, the display control portion 14 displays the vehicle icon VA and the division line KA in a manner corresponding to the positional relationship between the actual position of the host vehicle and the position of the division line based on the camera division line information, and the positional relationship between the vehicle icon VA displayed on the display 4 and the position of the division line KA based on the camera division line information, when causing the display 4 to display the division line based on the camera division line information.

[0045] Further, the display control portion 14 displays the division line at the position of the display 4 corresponding to the position of the division line of the map division line information, as the display of the division line based on the map division line information. Specifically, the display control portion 14 displays the vehicle icon VA and the division line KA in a manner corresponding to the positional relationship between the actual position of the host vehicle and the position of the division line based on the map division line information, and the positional relationship between the vehicle icon VA displayed on the display 4 and the position of the division line KA based on the map division line information, when causing the display 4 to display the division line based on the map division line information.

[0046] Note that, sometimes, another vehicle is detected in the vicinity of the host vehicle by a radar or the like mounted on the host vehicle. In this case, the display control portion 14 can also cause the display 4 to display another vehicle icon VB indicating the detected other vehicle. At this time, the display control portion 14 displays the other vehicle icon VB in a manner corresponding to the positional relationship between the actual position of the host vehicle and the position of the detected other vehicle, and the positional relationship between the position of the vehicle icon VA displayed on the display 4 and the position of the other vehicle icon VB.

[0047] The display control portion 14 switches the display of the division line based on the camera division line information and the display of the division line based on the map division line information, based on various conditions such as the running position of the host vehicle and the recognition state of the division line based on the captured image of the camera 1. For example, when the display of the division line based on the map division line information is performed, sometimes, the vehicle enters a region in which the map division line information is not included in the map information. In this case, the display control portion 14 cannot perform the display of the division line based on the map division line information. In such a case, the display control portion 14 switches from the display of the division line based on the map division line information to the display of the division line based on the camera division line information. Further, for example, due to the influence of the state of another vehicle in the vicinity of the host vehicle, fog, backlight, or the like, sometimes, the division line recognition portion 12 cannot appropriately recognize the division line based on the captured image of the camera 1. In such a case, the display control portion 14 switches from the display of the division line based on the camera division line information to the display of the division line based on the map division line information.

[0048] As described above, the display control unit 14 determines whether to switch the display of dividing lines based on various conditions, such as the vehicle's driving position and the status of dividing line recognition based on the image captured by the camera 1. Alternatively, a priority for displaying dividing lines may be determined for camera dividing line information and map dividing line information. In this case, the display control unit 14 may determine whether to switch the display based on the determined priority when both camera dividing line information and map dividing line information are available. For example, the display of dividing lines may be based on the lower-priority information of the camera dividing line information and the map dividing line information. In this state, the higher-priority information may also be available. In this case, the display control unit 14 determines that it is necessary to switch the display of dividing lines from the lower-priority information of the camera dividing line information and the map dividing line information to the higher-priority information. If it is determined that switching the display of dividing lines is necessary, the display control unit 14 switches the display of dividing lines based on the camera dividing line information to the display of dividing lines based on the map dividing line information.

[0049] Hereinafter, a case will be described in which it is determined that the display of the dividing line needs to be switched, and the display control unit 14 switches the display of the dividing line based on the camera dividing line information and the display of the dividing line based on the map dividing line information. Figure 4 As shown in FIG. 4 , it is assumed that the display 4 is displaying the dividing line MA based on the camera dividing line information. In this state, it is determined that the display of the dividing line needs to be switched, and the display is switched to the dividing line based on the map dividing line information. It should be noted that the dividing line recognition unit 12 is based on the image captured by the camera 1, as shown in FIG. Figure 2 As shown in FIG, the state of the dividing line K1 and the dividing line K2 of the own lane L and the dividing line K10 of the adjacent lane L10 of the own vehicle V is recognized. In addition, it is assumed that the map dividing line information stored in the map database 3 is also as shown in FIG. Figure 2 As shown, the periphery of the traveling position of the host vehicle V includes information on the positions of the dividing lines K1 and K2 of the host lane L of the host vehicle V and information on the position of the dividing line K10 of the adjacent lane L10 .

[0050] based on Figure 4 The dividing line MA of the camera dividing line information shown includes the dividing line K1 of the own lane L (see Figure 2 ) corresponding to the dividing line M1A, and the dividing line K2 of the lane L (refer to Figure 2 ) corresponding to the dividing line M2A, and the dividing line K10 of the adjacent lane L10 (refer to Figure 2 ) corresponds to the dividing line M10A.

[0051] The display control unit 14 Figure 4The display of the dividing line MA of the camera dividing line information shown is switched to the display based on Figure 5 When displaying the dividing line NA of the map dividing line information shown in FIG. 1 , after fading out the dividing line MA based on the camera dividing line information, the dividing line NA based on the map dividing line information is faded in. Figure 5 The dividing line NA of the map dividing line information shown includes the dividing line K1 of the own lane L (see Figure 2 ) corresponding to the dividing line N1A, and the dividing line K2 of the lane L (refer to Figure 2 ) corresponding to the dividing line N2A, and the dividing line K10 of the adjacent lane L10 (refer to Figure 2 ) corresponds to the dividing line N10A.

[0052] It should be noted that fading out the dividing line may mean gradually lightening the color of the dividing line, gradually approaching the background color, gradually reducing the brightness of the dividing line, gradually thinning the dividing line, or a combination of two or more of these. Furthermore, fading in the dividing line may mean gradually darkening the color of the dividing line, gradually approaching the color of the dividing line from the background color to the color that should be displayed, gradually increasing the brightness of the dividing line, gradually thickening the dividing line, or a combination of two or more of these.

[0053] Alternatively, the display control unit 14 may be configured to Figure 4 The display of the dividing line MA of the camera dividing line information shown is switched to the display based on Figure 5 In the case of displaying the dividing line NA based on the map dividing line information shown in the figure, the dividing line MA based on the camera dividing line information is faded out, and then the dividing line NA based on the map dividing line information is displayed. Here, the dividing line NA based on the map dividing line information is not gradually displayed by fading in, but is displayed instantaneously.

[0054] Furthermore, the display control unit 14 may also be configured to Figure 4 The display of the dividing line MA of the camera dividing line information shown is switched to the display based on Figure 5 In the case of displaying the dividing line NA based on the map dividing line information shown in the figure, after eliminating the dividing line MA based on the camera dividing line information, the dividing line NA based on the map dividing line information is faded in. Here, eliminating the dividing line MA based on the camera dividing line information does not gradually eliminate the display by fading out, but rather instantly eliminates the display of the dividing line MA.

[0055] Thus, the display control section 14 switches the display of the division line MA based on the camera division line information to the display of the division line NA based on the map division line information using at least either of fade-in and fade-out when it is determined that the display of the division line needs to be switched. Figure 4 As shown in FIG. 6, the display control section 14 switches the display of the division line MA based on the camera division line information to the display of the division line NA based on the map division line information using at least either of fade-in and fade-out when it is determined that the display of the division line needs to be switched. Figure 5 As shown in FIG. 6, the display control section 14 switches the display of the division line MA based on the camera division line information to the display of the division line NA based on the map division line information using at least either of fade-in and fade-out when it is determined that the display of the division line needs to be switched. Figure 5 As shown in FIG. 6, the display control section 14 switches the display of the division line MA based on the camera division line information to the display of the division line NA based on the map division line information using at least either of fade-in and fade-out when it is determined that the display of the division line needs to be switched. Figure 5 As shown in FIG. 6, the display control section 14 switches the display of the division line MA based on the camera division line information to the display of the division line NA based on the map division line information using at least either of fade-in and fade-out when it is determined that the display of the division line needs to be switched. Figure 4 As shown in FIG. 6, the display control section 14 switches the display of the division line MA based on the camera division line information to the display of the division line NA based on the map division line information using at least either of fade-in and fade-out when it is determined that the display of the division line needs to be switched.

[0056] Here, for example, the position of the division line MA based on the camera division line information and the position of the division line NA based on the map division line information sometimes shift from each other (slightly shift). This occurs, for example, due to an error in recognition of the division line based on the captured image of the camera 1, an error in recognition of the position of the host vehicle V in the case where the division line is displayed based on the map division line information, or the like. In this case, for example, when the display of the division line MA based on the camera division line information is switched to the display of the division line NA based on the map division line information, the position of the division line displayed on the display 4 can differ before and after the switching.

[0057] Thus, the display control section 14 of the in-vehicle display device 100 performs at least either of fade-in when the division line is displayed and fade-out when the division line is eliminated in the case where the display of the division line based on the camera division line information is switched to the display of the division line based on the map division line information. That is, the in-vehicle display device 100 does not instantaneously switch the display of the division line in the case where the information source of the division line is switched. In the case where the display of the division line is instantaneously switched without using fade-in and fade-out, the division line sometimes suddenly disappears, the division line suddenly appears at a position different from the position where the division line disappeared, and the occupant sometimes feels a sense of strangeness. Thus, the in-vehicle display device 100 can switch the information source for displaying the division line while suppressing the occupant from feeling a sense of strangeness by using at least either of fade-in and fade-out.

[0058] It should be noted that the display control unit 14 may also be configured as follows: after switching between the display of the dividing line based on the camera dividing line information and the display of the dividing line based on the map dividing line information, the display of the dividing line based on the camera dividing line information and the display of the dividing line based on the map dividing line information are not switched until a prescribed switching standby time has passed. The prescribed switching standby time is predetermined. In this case, the vehicle-mounted display device 100 can suppress the switching of the dividing line information source, thereby suppressing the passengers from feeling troubled by the display switching. It should be noted that such suppression of the switching of the dividing line display is performed when both the camera dividing line information and the map dividing line information can be used. After it is determined that switching is necessary, the display of the dividing line based on the information before the switching is maintained until the prescribed switching standby time has passed. The display control unit 14 switches the display of the dividing line after the prescribed switching standby time has passed.

[0059] (Second embodiment)

[0060] Next, a second embodiment of the vehicle-mounted display device will be described. Figure 6 As shown, the vehicle-mounted display device 100A of this embodiment includes a display control unit 14A instead of the display control unit 14 of the vehicle-mounted display device 100 of the first embodiment. The configuration of this embodiment other than the display control unit 14A is the same as that of the first embodiment, and detailed description thereof will be omitted.

[0061] The display control unit 14A displays a dividing line on the display 4 at a dividing line position based on the camera dividing line information or at a dividing line position based on the map dividing line information. The display control unit 14A differs from the display control unit 14 of the first embodiment only in the configuration for switching the display of the dividing line; the rest of the configuration is the same as that of the display control unit 14 of the first embodiment.

[0062] Hereinafter, a case will be described in which it is determined that the display of the dividing line needs to be switched, and the display control unit 14A switches the display of the dividing line based on the camera dividing line information and the display of the dividing line based on the map dividing line information. Figure 7 As shown in FIG, it is assumed that the dividing line PA is being displayed at the position of the dividing line based on the camera dividing line information. When it is determined that the display of the dividing line needs to be switched in this state, as shown in FIG. Figure 8 As shown, the display control unit 14A displays the dividing line PA at the position of the dividing line based on the map dividing line information.

[0063] For example, it is assumed that although the position of the dividing line based on the camera dividing line information and the position of the dividing line based on the map dividing line information are the same dividing line, a positional shift occurs. In this case, the display control unit 14AFigure 7 The display of the division line PA of the camera division line information shown in FIG. 6 is switched to the display of the division line PA of the map division line information shown in FIG. 7. Figure 8 In the case where the display of the division line PA of the map division line information shown in FIG. 7, the division line PA is gradually shifted from the position of the division line being displayed based on the camera division line information to the position of the division line that should be displayed based on the map division line information.

[0064] Specifically, for example, as shown in FIG. 8, the display position P1 of the division line displayed on the display 4 based on the camera division line information and the display position P2 of the division line displayed on the display 4 based on the map division line information are shifted. In such a case, the display control section 14A gradually switches the division line PA from the display position P1 of the division line being displayed based on the camera division line information to the display position P2 of the division line that should be displayed based on the map division line information. Figure 9

[0065] For example, in the example shown in FIG. 9, the position of the division line PA on the left side of the own vehicle icon VA is shifted between the division line based on the camera division line information and the division line based on the map division line information. Therefore, as shown in FIG. 10, the division line PA on the left side of the own vehicle icon VA is gradually shifted from the position of the division line being displayed based on the camera division line information to the position of the division line that should be displayed based on the map division line information. Figure 7 Figure 8 Figure 8

[0066] Note that in the case where there is no shift in the position of the division line before and after the switching, the shift of the division line at the time of switching the display of the division line is not performed. For example, it can be configured such that the shift of the division line is performed in the case where the shift in the position of the division line before and after the switching is equal to or greater than a prescribed shift amount.

[0067] For example, the display control section 14A determines whether there is a shift in the position of the division line before and after the switching in the case where the display of the division line is to be switched. It can be configured such that the display control section 14A gradually shifts the division line in the case where there is a shift.

[0068] Thus, the display control section 14A gradually shifts the division line based on the shift of the division line in the case where it is determined that the display of the division line needs to be switched, while switching from the display of the division line PA based on the camera division line information shown in FIG. 6 to the display of the division line PA based on the map division line information shown in FIG. 7. Figure 7 Figure 8 Note that in the case where the display of the division line PA of the camera division line information shown in FIG. 6 is switched to the display of the division line PA of the map division line information shown in FIG. 7, the display control section 14A gradually shifts the division line PA from the position of the division line being displayed based on the camera division line information to the position of the division line that should be displayed based on the map division line information. Figure 8 ​​​​​When the division line PA based on the map division line information is being displayed as illustrated, it is sometimes determined that the display of the division line needs to be switched. In this case as well, the display control section 14A causes the division line to gradually transition based on the shift of the division line, while switching from the display of the division line PA based on the map division line information to the display of the division line PA based on the camera division line information. Figure 8 When the division line PA based on the map division line information is being displayed as illustrated, it is sometimes determined that the display of the division line needs to be switched. In this case as well, the display control section 14A causes the division line to gradually transition based on the shift of the division line, while switching from the display of the division line PA based on the map division line information to the display of the division line PA based on the camera division line information. Figure 7 When the division line PA based on the map division line information is being displayed as illustrated, it is sometimes determined that the display of the division line needs to be switched. In this case as well, the display control section 14A causes the division line to gradually transition based on the shift of the division line, while switching from the display of the division line PA based on the map division line information to the display of the division line PA based on the camera division line information.

[0069] Here, sometimes the number of division lines included in the camera division line information and the map division line information differs from each other. For example, as illustrated in FIG. 19, sometimes the camera division line information includes information of the positions of the division lines K1 and K2 of the own lane L on which the own vehicle V is traveling, but does not include information of the position of the division line K10 of the adjacent lane L10. This case can be exemplified by a case where the division line K10 cannot be detected by the camera 1 due to being blocked by other vehicles around the own vehicle V, or the like. On the other hand, the map division line information sometimes includes information of the positions of the division lines K1 and K2 of the own lane L and information of the position of the division line K10 of the adjacent lane L10 that is adjacent to the own lane L. Figure 2

[0070] Thus, in a case where the number of division lines included in the map division line information is more than the number of division lines included in the camera division line information, when the display of the division line based on the camera division line information is switched to the display of the division line based on the map division line information, the number of division lines displayed on the display 4 increases. Here, as illustrated in FIG. 20, assume that the display 4 is displaying the division line QA based on the camera division line information. Based on the division line QA of the camera division line information illustrated in FIG. 20, the division line Q1A corresponding to the division line K1 of the own lane L (refer to FIG. 18) and the division line Q2A corresponding to the division line K2 of the own lane L (refer to FIG. 18) are included. Figure 10 Figure 10 Figure 2 Figure 2

[0071] In a case where it is determined that the display of the division line needs to be switched in this state, and the display based on the map division line information is switched, the display control section 14A displays the division line of the adjacent lane in addition to the division line of the own lane. In this case, the display control section 14A displays the division line of the adjacent lane in addition to the division line of the own lane, based on the division line of the map division line information. Specifically, the display control section 14A displays the division line of the adjacent lane in addition to the division line of the own lane, based on the division line of the map division line information, in a case where it is determined that the display of the division line needs to be switched. Figure 11 ​​​​​As illustrated, the position of the lane division line of the own lane based on the map lane division line information is displayed as the lane division line Q1A and the lane division line Q2A which are the lane division lines QA of the own lane. At this time, the position of the lane division line of the own lane based on the camera lane division line information and the position of the lane division line of the own lane based on the map lane division line information sometimes shift. In this case, as described above, the display control portion 14A causes the lane division line of the own lane to gradually shift from the position of the lane division line of the own lane which is being displayed based on the camera lane division line information to the position of the lane division line of the own lane which should be displayed based on the map lane division line information.

[0072] For example, in the example illustrated in Figure 10 and Figure 11 the position of the lane division line Q1A on the right side of the own vehicle icon VA shifts between the lane division line based on the camera lane division line information and the lane division line based on the map lane division line information. Therefore, as illustrated in Figure 11 the lane division line Q1A on the right side of the own vehicle icon VA is caused to gradually shift from the position of the lane division line which is being displayed based on the camera lane division line information to the position of the lane division line which should be displayed based on the map lane division line information.

[0073] After the shift (display) of the lane division line QA of the own lane is completed, the display control portion 14A also displays the lane division line Q10A of the adjacent lane at the position of the lane division line of the adjacent lane based on the map lane division line information. That is, after the lane division line Q1A and the lane division line Q2A of the own lane are displayed at the position of the lane division line based on the map lane division line information, the lane division line Q10A of the adjacent lane based on the map lane division line information is displayed.

[0074] As described above, the display control portion 14A of the in-vehicle display device 100A, in a case where the display of the lane division line based on the camera lane division line information is switched to the display of the lane division line based on the map lane division line information, causes the lane division line to gradually shift to the position of the lane division line which should be displayed based on the map lane division line information. That is, the in-vehicle display device 100A, in a case where the information source of the lane division line is switched, does not instantaneously switch the position of the lane division line which is displayed on the display 4. In a case where the display position of the lane division line is instantaneously switched, the lane division line sometimes suddenly disappears, the lane division line suddenly appears at a position different from the position where the lane division line disappeared, and the occupant sometimes feels a sense of strangeness. Thus, the in-vehicle display device 100A, by causing the lane division line to gradually shift to the position of the lane division line which should be displayed based on the map lane division line information after the display is switched, can switch the information source for displaying the lane division line while suppressing the occupant from feeling a sense of strangeness.

[0075] For example, in a case where the information sources of the division lines are different, the positions of the division lines displayed based on these information sources sometimes shift from each other. Therefore, in a case where the division lines of the own lane whose information sources are different from each other and the division lines of the adjacent lane are combined and displayed, the division lines sometimes cross each other, or the display of the width of the lane is sometimes wide or narrow. For example, in the example shown in FIG. 10, when the division line Q1A of the own lane based on the camera division line information indicated by the double dashed line and the division line Q10A of the adjacent lane based on the map division line information are simultaneously displayed, the width of the adjacent lane indicated by the division line Q1A and the division line Q10A becomes narrow. Due to this, the occupant sometimes feels a sense of strangeness. Figure 11

[0076] Therefore, the display control section 14A of the in-vehicle display device 100A displays the division line of the adjacent lane based on the map division line information after the display of the division line of the own lane is switched to the display of the division line of the own lane based on the map division line information. That is, the in-vehicle display device can display the division line of the adjacent lane in a state where the information source of the division line of the own lane and the information source of the division line of the adjacent lane are the same as each other (here, a state where both are the map division line information). Due to this, even in a case where the division line of the adjacent lane is newly displayed in addition to the division line of the own lane, the in-vehicle display device 100A can suppress the occupant from feeling a sense of strangeness.

[0077] (First Modification of the Second Embodiment)

[0078] The first modification of the second embodiment will be described. In this modification, a process of suppressing switching of the display of the division line in the display control section 14A in a short period is added. Here, as with the second embodiment, a state is assumed where the camera division line information includes information of the positions of the division line K1 and the division line K2 of the own lane L in which the host vehicle V travels, but does not include information of the position of the division line K10 of the adjacent lane L10. On the other hand, a state is assumed where the map division line information includes information of the positions of the division line K1 and the division line K2 of the own lane L and information of the position of the division line K10 of the adjacent lane L10 which is adjacent to the own lane L.

[0079] ​In this state, the display control section 14A sometimes switches the display of the division line from the display based on the map division line information to the display based on the camera division line information, and then, within a predetermined determination time, switches the display of the division line from the display based on the camera division line information to the display based on the map division line information again. The predetermined determination time is determined in advance. At the time when this switching is to be performed, from the state in which the display 4 is displaying the division line of the own lane and the division line of the adjacent lane, the division line of the adjacent lane disappears, and then the division line of the adjacent lane is displayed again in addition to the division line of the own lane. In the case where the time during which the division line of the adjacent lane disappears is short, the occupant who observes the display of the division line of the adjacent lane that disappears instantaneously sometimes feels a sense of strangeness.

[0080] Therefore, the display control section 14A can delay the display timing of the division line of the adjacent lane based on the map division line information at the time when the display of the division line based on the camera division line information is switched to the display of the division line based on the map division line information. Here, as described above, the display control section 14A gradually switches the division line of the own lane from the position of the division line of the own lane that is being displayed based on the camera division line information to the position of the division line of the own lane that should be displayed based on the map division line information. The display control section 14A does not display the division line of the adjacent lane at the position of the division line of the adjacent lane based on the map division line information until a predetermined display standby time elapses after the transition of the division line of the own lane is completed. The predetermined display standby time is determined in advance. After the predetermined display standby time elapses, the display control section 14A displays the division line of the adjacent lane at the position of the division line of the adjacent lane based on the map division line information.

[0081] Thus, for example, the display of the division line is sometimes switched in the order of the display based on the map division line information, the display based on the camera division line information, and the display based on the map division line information again. In the case of the display based on the camera division line information, the division line of the own lane is displayed, and in the case of the display based on the map division line information, the division line of the adjacent lane is displayed in addition to the division line of the own lane. In this case, at the time when the display based on the camera division line information is performed, the division line of the adjacent lane disappears, and then at the time when the display based on the map division line information is performed again, the division line of the adjacent lane is displayed again. Therefore, the display control section 14A of the in-vehicle display device 100A does not display the division line of the adjacent lane until a predetermined display standby time elapses at the time when the display based on the map division line information is performed again. Thus, the in-vehicle display device 100A can suppress the division line of the adjacent lane from being displayed again after disappearing for a short time, and suppress the occupant from feeling a sense of strangeness.

[0082] (Second Modification of the Second Embodiment)

[0083] A second modification of the second embodiment will be described. In this modification, a process of suppressing switching of display of the division line in the display control section 14A in a short period is added. Here, the display control section 14A, after switching of display of the division line based on the camera division line information and display of the division line based on the map division line information is performed, does not perform switching of display of the division line based on the camera division line information and display of the division line based on the map division line information during a period until a prescribed switching standby time elapses. After the prescribed switching standby time elapses, the display control section 14A performs switching of display of the division line. In this case, the in-vehicle display device 100A can suppress switching of the information source of the division line and can suppress the occupant from feeling bothered by the switching of the display. Note that the suppression of the switching of the display of the division line is performed in a state in which both the camera division line information and the map division line information can be used. After it is determined that switching is necessary, display of the division line based on the information before the switching is maintained until the prescribed switching standby time elapses. The display control section 14A switches the display of the division line after the prescribed switching standby time elapses.

[0084] The above describes various embodiments and various modifications of the present disclosure, but the present disclosure is not limited to the above-described embodiments and modifications. For example, the case in which the display control section 14 and the display control section 14A switch display of the division line based on the camera division line information and display of the division line based on the map division line information is described as an example. The information source of the case in which the display control section 14 and the like switches display of the division line is not limited to the camera division line information and the map division line information. For example, the display control section 14 and the like can also switch display of the division line based on first map division line information and display of the division line based on second map division line information. The second map division line information can also be information created based on different precision or different information sources from the first map division line information. The display control section 14 and the like can be configured to switch display of the division line based on division line information different from each other. Further, in the second embodiment and the like, the case in which the number of division lines included in the map division line information is more than the number of division lines included in the camera division line information is described as an example. However, this is not limiting, and the number of division lines included in the camera division line information can be more than the number of division lines included in the map division line information.

[0085] Figure 4 The display of the division line in the display 4 described in the first embodiment and the like is one example, and is not limited to a view obtained by viewing the host vehicle and the division line from the rear and obliquely above the host vehicle. A view obtained by viewing the host vehicle and the division line from above (a plan view) can also be displayed in the display 4.

Claims

1. A vehicle-mounted display device that displays a division line of a road on a display of a vehicle, the vehicle-mounted display device comprising: An acquisition unit acquires first division line information including information on positions of division lines and second division line information including information on positions of the division lines and different from the first division line information; a first division line information acquisition unit that acquires first division line information including information of a position of the division line; and a display control unit that performs display of the division line based on the first division line information and display of the division line based on second division line information that is different from the first division line information, as display of the division line in the display, the display control unit, in a case where display of the division line based on the first division line information is switched to display of the division line based on the second division line information, performs the following action: after causing the division line based on the first division line information to fade out, displays the division line based on the second division line information; or after eliminating the division line based on the first division line information, causes the division line based on the second division line information to fade in; or after causing the division line based on the first division line information to fade out, causes the division line based on the second division line information to fade in.

2. A vehicle-mounted display device that displays a division line of a road on a display of a vehicle, the vehicle-mounted display device comprising: an acquisition unit that acquires first division line information including information of a position of the division line and second division line information that includes information of the position of the division line and is different from the first division line information; and a display control unit that performs display of the division line based on the first division line information and display of the division line based on the second division line information, as display of the division line in the display, the display control unit, in a case where display of the division line based on the first division line information is switched to display of the division line based on the second division line information, causes the division line to gradually change from a position of the division line that is being displayed based on the first division line information to a position of the division line that should be displayed based on the second division line information.

3. The vehicle-mounted display device according to claim 2, wherein the first division line information includes information of a position of the division line of a home lane in which the vehicle is traveling, the second division line information includes information of a position of the division line of the home lane and information of a position of the division line of an adjacent lane that is adjacent to the home lane, the display control unit, in a case where display of the division line based on the first division line information is switched to display of the division line based on the second division line information, causes the division line of the home lane to gradually change from a position of the division line of the home lane that is being displayed based on the first division line information to a position of the division line of the home lane that should be displayed based on the second division line information, after the change is completed, also displays the division line of the adjacent lane at a position of the division line of the adjacent lane based on the second division line information.

4. The vehicle-mounted display device according to claim 3, wherein The display control section, after switching the display of the division line from the display based on the second division line information to the display based on the first division line information, in a case where the display of the division line is switched again from the display based on the first division line information to the display based on the second division line information within a prescribed determination time, After causing the division line of the own lane to gradually transition from the position of the division line of the own lane that is being displayed based on the first division line information to the position of the division line of the own lane that should be displayed based on the second division line information, the division line of the adjoining lane is not displayed at the position of the division line of the adjoining lane based on the second division line information until a prescribed display standby time elapses.

5. The in-vehicle display device according to any one of claims 1 to 3, wherein The display control section, after the switching of the display of the division line based on the first division line information and the display of the division line based on the second division line information is performed, does not perform the switching of the display of the division line based on the first division line information and the display of the division line based on the second division line information during a period until a prescribed switching standby time elapses.

Images