JP2010190765A - Navigation apparatus and display method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation apparatus capable of attaining easy display without interrupting a driver's field of view by solving the following problem: a conventional navigation apparatus which switches between color scheme data, and brightness, contrast and the like in forming an image according to outside brightness, uniformly switches the color scheme of the whole screen displayed thereby, however, a driver's field of view may be interrupted when the outside of a vehicle is dark, such as at night. <P>SOLUTION: The navigation apparatus, having a display unit, includes: a running state acquisition unit for acquiring a running state of an own vehicle; a dividing unit for dividing information to be displayed on the display unit into a plurality of display areas; and a drawing unit performing a display after changing at least one of drawing attributes of contrast, concentration and hue according to the running state acquired by the running state acquisition unit for each of the display areas divided by the dividing unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display technology for a navigation device.

  2. Description of the Related Art Conventionally, a navigation device has a technique for switching color scheme data, luminance, contrast, and the like when generating an image according to external brightness (Patent Document 1).

  Patent Document 1 describes a technique regarding such a navigation device.

JP 2000-10543 A

  In the above navigation device, since the color scheme of the entire screen displayed by the navigation device is uniformly switched, there is a possibility that the driver's view may be hindered when the outside of the vehicle is dark such as at night.

  It is an object of the present invention to provide a display technique that hardly disturbs the driver's field of view in a navigation device.

  In order to solve the above problems, a navigation device according to the present invention includes a traveling state acquisition unit that acquires a traveling state of a host vehicle, a division processing unit that divides information to be displayed on the display unit into a plurality of display regions, For each display area divided by the division processing unit, a drawing processing unit that changes and displays at least one drawing attribute of contrast, density, and hue according to the traveling state acquired by the traveling state acquisition unit, and It is characterized by having.

  Further, in the display method of the navigation device including the display unit according to the present invention, the navigation device divides the driving status acquisition procedure for acquiring the driving status of the vehicle and the information to be displayed on the display unit into a plurality of display areas. A display process divided by the division processing procedure, and at least one drawing attribute of contrast, density, and hue is changed and displayed according to the driving situation acquired by the driving condition acquisition unit The drawing processing procedure is performed.

FIG. 1 is a diagram illustrating a functional configuration of the in-vehicle device. FIG. 2 is a hardware configuration diagram of the in-vehicle device. FIG. 3 is a diagram illustrating a configuration example of a link table. FIG. 4 is a diagram illustrating a configuration example of the density determination table. FIG. 5 is a diagram illustrating a configuration example of the hue determination table. FIG. 6 is a diagram illustrating a configuration example of a contrast determination table. FIG. 7 is a diagram illustrating a configuration example of the area-specific adjustment item table. FIG. 8 is a flowchart of the map drawing process. FIG. 9 is a flowchart of the path drawing process. FIG. 10 is a flowchart of the drawing adjustment process. FIG. 11 is a diagram illustrating an example of a screen displayed by the route drawing process. FIG. 12 is a diagram illustrating a configuration example of the adjustment determination table.

  Hereinafter, a navigation device 100 which is an in-vehicle device to which an embodiment of the present invention is applied will be described with reference to the drawings.

  FIG. 1 is a functional block diagram of the navigation device 100.

  As illustrated, the navigation device 100 includes a measurement position detection unit 101, a traffic jam information acquisition unit 102, a map information storage unit 103, a route search unit 104, a current position calculation unit 105, and a vehicle information acquisition unit 106. An adjustment information storage unit 107, an image processing unit 108, and a display unit 109 including a backlight control unit 110.

  The measurement position detection unit 101 detects position information included in information such as GPS (Global Positioning System) as a measurement position that is the position of the measured vehicle.

  The traffic jam information acquisition unit 102 acquires traffic jam information that specifies the location of traffic jams, the size of traffic jams, and the like based on rough current traffic information such as VICS (Vehicle Information Communication System: registered trademark) information.

  The map information storage unit 103 stores terrain information, roads, or facilities information constituting the map.

  The route search unit 104 searches for a route to the destination using information indicating the measurement position detected by the measurement position detection unit 101, traffic information acquired by the traffic information acquisition unit 102, and the like. Specifically, for example, the route search unit 104 searches for a route to the destination according to a route search method such as the Dijkstra method, with the position indicated by the information indicating the measurement position as the departure point.

  The route search unit 104 stores a route obtained as a result of the search as a recommended route.

  The current position calculation unit 105 indicates the current position according to the information indicating the measurement position detected by the measurement position detection unit 101, the date and time of travel, and the reliability obtained as a result of map matching. Calculate the coordinates.

  The vehicle information acquisition unit 106 acquires vehicle information such as the traveling speed of the vehicle to which the navigation device 100 is attached.

  The adjustment information storage unit 107 stores information for performing image adjustment of information displayed on the screen. In particular, the drawing adjustment information corresponding to the traveling speed of the vehicle is stored.

  The image processing unit 108 acquires the route searched by the route search unit 104, the current position calculated by the current position calculation unit 105, the vehicle information acquired by the vehicle information acquisition unit 105, and the adjustment information storage unit 107. Based on the rendered drawing adjustment information, processing for configuring image information to be displayed is performed.

  The display unit 109 displays the image information configured by the image processing unit 108 to the user.

  The backlight control unit 110 is a part of the display unit 109 and controls the light emission amount of the backlight according to the luminance of the image information displayed on the display unit 109.

  As described above, the navigation device 100 includes the measurement position detection unit 101, the traffic jam information acquisition unit 102, the map information storage unit 103, the route search unit 104, the current position calculation unit 105, the vehicle information acquisition unit 106, Via this, information indicating the driving situation can be acquired.

  FIG. 2 shows a hardware configuration diagram of the navigation device 100.

  The navigation device 100 includes a display 1, a storage device 2, a voice input / output device 3 (including a microphone 31 as a voice input device and a speaker 32 as a voice output device), an input device 4, a ROM device 5, and a CPU ( Central Processing Unit (6), RAM (Random Access Memory) 7, ROM (Read Only Memory) 8, vehicle speed sensor 9, gyro sensor 10, GPS (Global Positioning System) receiver 11, and FM multiplex broadcast reception A device 12 and a beacon receiving device 13 are provided.

  The display 1 is a unit that graphically displays information output by the navigation device 100. The display 1 is composed of a liquid crystal display, an organic EL display, or the like. When the display 1 of the navigation device 100 is a self-luminous system such as an organic EL display, the backlight control unit 110 does not necessarily control the light emission amount of the backlight, and the brightness of the entire screen. As long as it can control.

  The storage device 2 is composed of at least a readable / writable storage medium such as an HDD (Hard Disk Drive) or a nonvolatile memory card.

  In this storage medium, a link table 200, a density determination table 300, a hue determination table 310, a contrast determination table 320, and an adjustment item table for each area 330 are stored.

  FIG. 3 is a diagram illustrating the configuration of the link table 200.

  The link table 200 is map data (including link data of links constituting roads on the map) necessary for a normal route search device.

  The link table 200 includes, for each mesh identification code (mesh ID) 201, which is a partitioned area on the map, link data 202 of each link constituting a road included in the mesh area.

  The link data 202 includes, for each link ID 211 that is a link identifier, a start node / end node 222 that is coordinate information of two nodes (start node and end node) constituting the link, and a road that indicates the type of road including the link. Type 223, link length 224 indicating the length of the link, link travel time 225 stored in advance, start connection link indicating link connected to start node and link connected to end node, end connection link 226, link Including a name 227 indicating a name of the road (for example, “National Route 1” or the like).

  Here, by distinguishing the start node and the end node for the two nodes constituting the link, the upward direction and the downward direction of the same road are managed as different links.

  FIG. 4 is a diagram showing the configuration of the density determination table 300. The density determination table 300 stores the density for adjusting the drawing information in association with the distance from the vehicle position, the distance between the vehicle and the intersection, and the travel frequency.

  Specifically, the record of the concentration determination table 300 includes a distance 301 from the vehicle position, a distance 302 between the vehicle and the intersection, a travel frequency 303, and a concentration 304.

  The distance 301 from the vehicle position is information indicating the distance between the drawing position and the position of the vehicle to which the navigation device 100 is attached. For example, a specific distance such as “100 m” or “ This is information for specifying a predetermined range such as “100 m to 200 m”.

  The distance 302 between the own vehicle and the intersection is information indicating the distance between the intersection on which the right / left turn should be made immediately on the recommended route and the position of the vehicle to which the navigation device 100 is attached, for example, “100 m”. For example, it is information specifying a specific distance or a predetermined range such as “100 m to 200 m”.

  The travel frequency 303 is information indicating the frequency at which the host vehicle has traveled on the road to which the current position of the host vehicle that is the vehicle to which the navigation device 100 is attached belongs. For example, it is information indicating the number of times of passing or entering during a predetermined period.

  The density 304 is information for specifying the color intensity of the area when the area on the drawing target screen is displayed. For example, the density 304 may store a value specifying a predetermined density, or may store an increase / decrease amount of light and shade with respect to the predetermined density.

  In this embodiment, the density refers to information for specifying the gradation of each of the R, G, and B channels included in a certain pixel to be drawn. Therefore, increasing the density of a certain pixel means increasing the gradation value of each RGB channel of the pixel while maintaining the hue.

  FIG. 5 is a diagram illustrating the configuration of the color tone table 310. The hue table 310 stores the hue to be adjusted in association with the traveling speed of the host vehicle.

  Specifically, the records constituting the hue table 310 include information on the traveling speed 311 of the host vehicle and the hue 312.

  The traveling speed 311 of the host vehicle is a traveling speed of the host vehicle that is the vehicle to which the navigation device 100 is attached. For example, the traveling speed 311 is a predetermined speed such as “30 km / h” or a predetermined speed such as “20 km / h to 30 km / h”. This information identifies the range.

  The hue 312 is information for specifying the hue of the area when the area on the drawing target screen is displayed. For example, the hue 312 stores information indicating a tendency of a predetermined color (cold color, warm color, etc.).

  In this embodiment, the color tone refers to information for specifying a ratio of gradation values between R, G, and B channels of a certain pixel to be drawn. Accordingly, when warming a color of a certain pixel, the balance of gradation values between RGB channels of the pixel is changed. For example, it means increasing the gradation value of the R channel of the target pixel relative to other G and B channels.

  FIG. 6 is a diagram showing the configuration of the contrast determination table 320. The contrast determination table 320 stores the contrast and brightness in association with the distance between the vehicle and the intersection and the traveling speed.

  Specifically, the record of the contrast determination table 320 includes a distance 321 between the host vehicle and the intersection, a traveling speed 322, a contrast 323, and a luminance 324.

  The distance 321 between the host vehicle and the intersection is information indicating the distance between the intersection that should make a right or left turn on the recommended route and the position of the vehicle to which the navigation device 100 is attached, for example, “100 m”. For example, it is information specifying a specific distance or a predetermined range such as “100 m to 200 m”.

  The traveling speed 322 is a traveling speed of the vehicle that is the vehicle to which the navigation device 100 is attached. For example, a predetermined speed such as “30 km / h” or a predetermined range such as “20 km / h to 30 km / h” is specified. Information.

  Note that the contrast 323 determines the degree to which the distribution of the gradation value and the synthesized value of a predetermined channel is dispersed with respect to the gradation value and the synthesized value of each of the R, G, and B channels constituting each pixel of the display area. Information. For example, a histogram for the R channel in the display area is formed and expressed by a coefficient or the like for dispersing the histogram.

  The luminance 324 is information for specifying the light emission degree of the backlight of the display screen. That is, the higher the luminance 324, the higher the light emission level of the backlight.

  FIG. 7 is a diagram showing the configuration of the area-specific adjustment item table 330. The area-specific adjustment item table 330 stores an attribute item to be adjusted in association with each classification of the drawing target area.

  Specifically, the area-specific adjustment item table 330 includes an area type 331 and an adjustment item 332.

  The area type 331 is information for specifying the type of area on the drawing target screen that is determined in advance. For example, a “recommended route area” to which a link string indicating roads constituting a recommended route belongs.

  The adjustment item 332 is information for specifying an attribute to be adjusted in the drawing target area. For example, “density” and “contrast”. The adjustment item 332 includes information used for specifying each attribute, for example, information such as a traveling speed and a traveling frequency.

  Returning to FIG. The voice input / output device 3 includes a microphone 31 as a voice input device and a speaker 32 as a voice output device. The microphone 31 acquires sound outside the navigation device 100 such as a voice uttered by a user or another passenger.

  The speaker 32 outputs a message to the user generated by the CPU 6 or the like as an audio signal. The microphone 31 and the speaker 32 are separately arranged at predetermined parts of the vehicle. However, it may be housed in an integral housing. The navigation device 100 can include a plurality of microphones 31 and speakers 32.

  The input device 4 is a device that receives an instruction from the user through an operation by the user. The input device 4 includes a touch panel 41, a dial switch 42, and other hardware switches (not shown) such as scroll keys and scale change keys.

  The touch panel 41 is mounted on the display surface side of the display 1 and can see through the display screen. The touch panel 41 specifies a touch position corresponding to the XY coordinates of the image displayed on the display 1, converts the touch position into coordinates, and outputs the coordinate. The touch panel 41 is configured by a pressure-sensitive or electrostatic input detection element.

  The dial switch 42 is configured to be rotatable clockwise and counterclockwise, generates a pulse signal for every rotation of a predetermined angle, and outputs the pulse signal to the CPU 6 or the like. The CPU 6 obtains the rotation angle of the dial from the number of pulse signals.

  The ROM device 5 includes at least a readable storage medium such as a ROM (Read Only Memory) such as a CD-ROM or a DVD-ROM, or an IC (Integrated Circuit) card. In this storage medium, for example, moving image data, audio data, and the like are stored.

  The CPU 6 executes various processes such as numerical calculation and controlling each device.

  The RAM 7 stores map data, calculation data, and the like read from the storage device 3.

  The ROM 8 stores programs and data.

  The CPU 6, the RAM 7, and the ROM 8 of the navigation device 100 are connected via an I / F (interface) bus 14 for connecting various kinds of hardware to each other.

  The CPU 6, RAM 7, and ROM 8 are central units that perform various processes. For example, the measurement position is detected based on information output from the various sensors 9 and 10, the GPS receiver 11, the FM multiplex broadcast receiver 12, and the like. Further, map data necessary for display is read from the storage device 2 or the ROM device 5 based on the obtained measurement position information.

  The CPU 6, RAM 7, and ROM 8 develop the graphics of the read map data and display the current position on the display 1 in a superimposed manner. Further, using the map data or the like stored in the storage device 2 or the ROM device 5, an optimum route (recommended route) connecting the starting point (measurement position) instructed by the user and the destination is searched. Further, the user is guided using the speaker 32 and the display 1.

  The vehicle speed sensor 9, the gyro sensor 10, and the GPS receiver 11 are used by the navigation device 100 to detect a measurement position (own vehicle position) and the like.

  The vehicle speed sensor 9 is a sensor that outputs a value used to calculate the vehicle speed.

  The gyro sensor 10 is constituted by an optical fiber gyro, a vibration gyro, or the like, and detects an angular velocity due to rotation of a moving body.

  The GPS receiver 11 receives a signal from a GPS satellite and measures the distance between the mobile body and the GPS satellite and the rate of change of the distance with respect to three or more satellites, thereby measuring the measurement position, traveling speed, and It measures the direction of travel.

  The FM multiplex broadcast receiver 12 receives an FM multiplex broadcast signal sent from an FM multiplex broadcast station. FM multiplex broadcasting includes VICS information, current traffic information, regulation information, SA / PA (service area / parking area) information, parking information, weather information, text information provided by radio stations as FM multiplex general information, etc. There is.

  The beacon receiving device 13 receives rough current traffic information such as VICS information, regulation information, SA / PA information, parking lot information, weather information, emergency alerts, and the like. For example, it is a receiving device such as an optical beacon that communicates by light and a radio beacon that communicates by radio waves.

  Note that the measurement position detection unit 101 of the navigation device 100 described above identifies the measurement position based on GPS information received via the GPS receiver 11.

  The traffic jam information acquisition unit 102 described above acquires traffic jam information based on information received via the FM multiplex broadcast receiving device 12 or the beacon receiving device 13. The map information storage unit 103 and the adjustment information storage unit 107 described above are realized by the above-described tables stored in the storage device 2.

  The vehicle information acquisition unit 106 described above acquires vehicle information via the vehicle speed sensor 9, the gyro sensor 10, the GPS receiver 11, and the like.

  The route search unit 104, the current position calculation unit 105, and the image processing unit 108 described above are achieved by executing a program loaded on the RAM 7 by the CPU 6.

  The display unit 109 and the backlight control unit 110 are achieved by the display 1 and the voice input / output device 3.

  In addition, in order to make an understanding of the structure of the navigation apparatus 100 easy, each above-mentioned component is classified according to the main processing content. Therefore, the present invention is not limited by the way of classifying the components and their names. The configuration of the navigation device 100 can be classified into more components depending on the processing content. Moreover, it can also classify | categorize so that one component may perform more processes.

  Each functional unit may be constructed by hardware (ASIC, GPU, etc.). Further, the processing of each functional unit may be executed by one hardware or may be executed by a plurality of hardware.

  Next, the operation of the navigation device 100 will be described.

  FIG. 8 is a diagram illustrating a processing flow of the map drawing process of the navigation device 100.

  The map drawing process is a process of displaying information such as a map indicating the periphery of the vehicle that is the vehicle on which the navigation device 100 is mounted in the navigation device 100. Usually, the map drawing process is a process performed every time the position of the vehicle is changed or according to a predetermined cycle.

  First, the current position calculation unit 105 specifies the current position of the own vehicle more finely based on the measured position of the own vehicle (step S001).

  Specifically, the current position calculation unit 105 acquires the measurement position of the vehicle from the measurement position detection unit 101, collates with the map information stored in the map information storage unit 103 (map matching process), and determines the current position. Calculate, and specify the calculated current position as the vehicle position.

  Next, the image processing unit 108 specifies an area on the map to be drawn based on the current position specified in step S001 (step S002).

  Specifically, the image processing unit 108 reads out map information of a surrounding area to which the current position belongs from the map information storage unit 103, and specifies the map information of the surrounding area as a drawing area based on the current position.

  Then, the image processing unit 108 divides the drawing area specified in step S002 according to a predetermined rule (step S003).

  Specifically, the image processing unit 108 sets an area on the map within a predetermined range from the own vehicle among the drawing areas specified at step S002 as an area around the own vehicle, and an area on the map in the other range. Is divided into peripheral areas.

  Next, the image processing unit 108 adjusts the drawing for the vehicle surrounding area divided in step S003 (step S004).

  Specifically, the image processing unit 108 performs a drawing adjustment process to be described later on the surrounding area of the own vehicle.

  Next, the image processing unit 108 adjusts drawing for the peripheral area divided in step S003 (step S005).

  Specifically, the image processing unit 108 performs a drawing adjustment process described later on the peripheral area.

  Next, the image processing unit 108 adjusts the drawing for the auxiliary area that is a screen display area other than the area for drawing the map (step S006).

  Specifically, the image processing unit 108 targets areas on the screen other than the drawing area specified in step S002, such as a display area for information used for operation of the navigation device 100, a display area for traffic jam information, and the like. A drawing adjustment process described later is performed.

  Next, the image processing unit 108 instructs the display unit 109 to adjust the luminance of the backlight control unit 110 (step S007).

  Specifically, the image processing unit 108 adjusts the luminance of the backlight control unit 110 according to, for example, the current time, the lighting state of the headlamp, and the like.

  The above is the map drawing process.

  By performing the map drawing process described above, the navigation device 100 can distinguish and adjust the drawing of each of the area around the host vehicle, the surrounding area, and the auxiliary area. For example, it is possible to prevent the screen display from stimulating more than necessary by setting the contrast of the surrounding area of the vehicle to be increased and setting the contrast of the peripheral area to be decreased. In addition, by doing so, the driver can grasp information drawn on the screen efficiently while suppressing the luminance of the backlight, which leads to a reduction in the power consumption of the navigation device 100 and the environment. Friendly.

  Next, route drawing processing, which is drawing processing when the navigation device 100 is guiding a predetermined route, will be described with reference to FIG.

  FIG. 9 is a diagram illustrating a flow of route drawing processing of the navigation device 100.

  In the route drawing process, when the navigation device 100 is guiding a predetermined route searched by the route search unit 104 (hereinafter referred to as a recommended route), the route drawing process of the host vehicle that is the vehicle on which the navigation device 100 is mounted. This is a process for displaying information such as a map showing the periphery. Usually, the route drawing process is a process that is performed every time the position of the vehicle is changed or according to a predetermined cycle.

  First, the current position calculation unit 105 specifies the current position of the own vehicle more finely based on the measured position of the own vehicle (step S101).

  The process in step S101 is the same as the process in step S001 of the map drawing process.

  Next, the image processing unit 108 specifies an area on the map to be drawn based on the current position specified in step S101 (step S102).

  The process in step S102 is the same as the process in step S002 of the map drawing process.

  Then, the image processing unit 108 divides the drawing area specified in step S102 according to a predetermined rule (step S103).

  Specifically, the image processing unit 108 sets a region indicating a road included in the route set as the recommended route among the drawing regions identified in step S102 as a recommended route region, and within a predetermined distance from the recommended route. An area on the map in (2) is set as a recommended route surrounding area, and an area on the map that is not included in the recommended route area and the recommended route surrounding area is divided into peripheral areas.

  Note that the distance from the recommended route for determining the recommended route surrounding area is set to be shorter as the distance from the vehicle position increases.

  Next, the image processing unit 108 adjusts drawing for the recommended route area divided in step S103 (step S104).

  Specifically, the image processing unit 108 performs a drawing adjustment process described later on the recommended route area.

  Next, the image processing unit 108 adjusts drawing for the recommended route surrounding area divided in step S103 (step S105).

  Specifically, the image processing unit 108 performs a drawing adjustment process described later on the recommended route surrounding area.

  Next, the image processing unit 108 adjusts drawing for the peripheral area divided in step S103 (step S106).

  The process of step S106 is the same as the drawing process of the peripheral area in step S005 of the map drawing process.

  Next, the image processing unit 108 adjusts the drawing for the auxiliary area that is a screen display area other than the area for drawing the map (step S107).

  The processing in step S107 is the same as the drawing processing of the trapping area in step S006 of the map drawing processing.

  Next, the image processing unit 108 instructs the display unit 109 to adjust the luminance of the backlight control unit 110 (step S108).

  The process in step S108 is the same as the brightness adjustment process in step S007 of the map drawing process.

  The above is the path drawing process.

  By performing the above-described route drawing process, the navigation apparatus 100 can distinguish and adjust drawing of the recommended route, the region around the recommended route, the peripheral region, and the auxiliary region. For example, by setting to reduce the density of the recommended route area, setting the density of the recommended route surrounding area to be displayed in gradation, and setting to increase the density of the surrounding area, information other than the route that is likely to travel It becomes possible to display the image so that it is difficult to see, and it is possible to prevent the screen display from stimulating vision more than necessary. In addition, by doing so, the driver can grasp information drawn on the screen efficiently while suppressing the luminance of the backlight, which leads to a reduction in the power consumption of the navigation device 100 and the environment. Friendly.

  FIG. 10 is a diagram illustrating a processing flow of a drawing adjustment process performed in the map drawing process and the route drawing process of the navigation device 100.

  The drawing adjustment process is a process in the navigation device 100 that adjusts and displays drawing information for the drawing area specified by the navigation device 100. Normally, the drawing adjustment process is a process that is performed as necessary by designating a drawing area from the map drawing process or the route drawing process.

  First, the image processing unit 108 specifies an adjustment item according to the type of the designated drawing area (step S201).

  Specifically, the image processing unit 108 searches the information of the area 331 in the area-specific adjustment item table 330 and specifies the adjustment item 332 according to the type of the designated drawing area as an attribute to be adjusted. Further, information used for specifying the value of each attribute to be adjusted is also acquired.

  For example, in the case of a recommended route area, the density, hue, and contrast, which are adjustment items corresponding to the recommended route area, are specified as attributes to be adjusted.

  Next, the image processing unit 108 determines whether or not the attribute to be adjusted specified in step S201 includes density, and if so, specifies and applies the density. If the density is not included, control is transferred to the next step S203 (step S202).

  Specifically, the image processing unit 108 determines the density 304 with reference to the density determination table 300. At that time, the image processing unit 108, for each pixel indicating the point included in the region, the distance from the vehicle position to the point and the straight line distance between the vehicle and the nearest intersection on the recommended route And the density 304 corresponding to the traveling frequency of the road included in the region is determined.

  When information used to specify the value of the attribute to be adjusted specified in step S201 is acquired, the corresponding density 304 is specified based on the information. That is, when the travel frequency 303 is specified as information for specifying the density 304, the density 304 is specified based on the travel frequency 303.

  The road traveling frequency is determined based on the number of times of passing or entering the road with reference to travel history information (not shown) stored in the storage device 2 provided in the navigation device 100 or the like.

  Next, the image processing unit 108 determines whether or not the attribute to be adjusted specified in step S201 includes information specifying the hue, and if so, specifies and applies the hue. If no hue is included, control is transferred to the next step S204 (step S203).

  Specifically, the image processing unit 108 refers to the color determination table 310 and determines the color 312. At that time, the image processing unit 108 determines a color 312 corresponding to the latest travel speed acquired at the time of the vehicle.

  Note that the image processing unit 108 acquires the traveling speed via the vehicle information acquisition unit 106.

  Next, the image processing unit 108 determines whether or not the attribute to be adjusted specified in step S201 includes contrast, and if so, specifies and applies the contrast. If the contrast is not included, control is transferred to the next step S205 (step S204).

  Specifically, the image processing unit 108 determines the contrast 323 with reference to the contrast determination table 320. At that time, the image processing unit 108 determines the contrast 323 corresponding to the distance between the own vehicle and the intersection where the nearest right / left turn is made on the recommended route, and the latest traveling speed acquired at that time of the own vehicle. .

  When information used for specifying the value of the attribute to be adjusted specified in step S201 is acquired, the corresponding contrast 323 is specified based on the information. That is, when the travel speed 322 is specified as information for specifying the contrast 323, the contrast 323 is specified based on the travel speed 322.

  Next, the image processing unit 108 causes the display unit 109 to draw the drawing area by reflecting the adjustment results in steps S202 to S204 on the designated drawing area.

  The drawing adjustment process has been described above.

  By the drawing adjustment processing, the image to be displayed on the display 1 can be displayed by adjusting the contrast, hue, density, and the like individually according to the type of each divided region obtained by dividing the image. .

  Further, in the drawing adjustment process, the image processing unit 108 further sets a drawing area for the area where the traffic jam occurs based on the information on the traffic jam acquired from the VICS or the like, and adjusts and displays the drawing attributes such as the contrast. You may make it do.

  Hereinafter, an example of the screen 400 displayed on the display 1 by the route drawing process will be described.

  FIG. 11 shows a car mark 401 indicating the current position of the host vehicle, roads 410 to 412 that are roads constituting the recommended route, and boundaries 420R and L (points on the right side of the host vehicle) indicating points separated from the recommended route by a predetermined distance. 420R, the left boundary of the vehicle is 420L), recommended route surrounding areas 421R and 421L in the boundaries 420R and 420L, peripheral areas 430R and 430L outside the boundaries 420R and 420L, auxiliary areas 440 and auxiliary areas It is a figure which shows the positional relationship on the screen of the menu call button 441 and the traffic information display area 442 which are included.

  The car mark 401 is the position of the vehicle on which the navigation device 100 is mounted.

  The menu call button 411 is a button for displaying a menu for selecting a function that can be executed by the navigation device 100 when an input from the user is received.

  The traffic jam information display area 442 is an area for displaying information related to the traffic jam acquired from VICS or the like. For example, the traffic jam information display area 442 is an area for showing information for identifying the traffic jam spot and the scale of the nearest traffic jam.

  The road 410 includes a road 410 to which the own vehicle position belongs, a road 411 that is within a predetermined distance from the own vehicle position, and a road 412 that is farther than the predetermined distance from the own vehicle position. The road 411 is drawn so as to have a higher density than the road 410, and the road 412 is drawn so as to have a higher density than the road 411.

  In addition, the recommended route surrounding areas 421R and 421L are displayed so that the density gradually increases from the roads 410 to 412 constituting the recommended route toward the surrounding areas 430R and 430L, that is, to form a gradation.

  The embodiment of the present invention has been described above.

  The navigation device 100 to which an embodiment of the present invention is applied can show information on an area on a map that is considered to be of great interest to the user so as to stand out when necessary. Thereby, the user can avoid that the screen of the navigation apparatus 100 is too bright and the visual field is obstructed when the outside of the vehicle is dark, such as at night. In addition, since the amount of light emitted from the backlight or the like can be minimized, the power consumption of the navigation device 100 can be reduced.

  In addition, for example, by applying one embodiment of the present invention, the navigation apparatus 100 provides contrast so that the recommended route is conspicuous when the vehicle enters an intersection to be careful to make a right or left turn or the like. It is possible to provide sufficient guidance while ensuring the driver's view by reducing the color density of the road outside the recommended route while increasing the display. Of course, when driving on an unbranched road after passing through an intersection, guidance can be provided without hindering visual stimulation by reducing the contrast of the entire display screen and reducing the amount of light emitted from the backlight. .

  In addition, the navigation device 100 to which an embodiment of the present invention is applied can lower the contrast of the display unit as the road has a higher frequency that the user has traveled in the past. Thereby, when driving on a road that the user knows, it is possible to prevent the driver's visual field from being obstructed compared to driving on an unknown road.

  Note that when a self-luminous organic EL display is used as the display 1, it is not necessary to perform backlight control, and therefore a brightness control unit that controls brightness is applied instead of the backlight control unit 110. Can do. In that case, the brightness may be controlled for each drawing target area in the map drawing process, the route drawing process, or the drawing adjustment process. By doing so, navigation can be performed without hindering the visual field of the user.

  The present invention is not limited to the above embodiment. The above embodiment can be variously modified within the scope of the technical idea of the present invention.

  For example, the density determination table 300, the hue determination table 310, and the contrast determination table 320 of the above embodiment may be integrated into the adjustment determination table 500.

  An example of the adjustment determination table 500 will be described with reference to FIG.

  FIG. 12 is a diagram illustrating a configuration of the adjustment determination table 500. The adjustment determination table 500 is a table that collectively stores combinations of adjustment values of density, color tone, contrast, and backlight to be adjusted.

  Specifically, the record of the adjustment determination table 500 includes the concentration 505 according to the combination of the distance 501 between the own vehicle and the intersection, the traveling frequency 502, the traveling speed 503, and the distance 504 from the own vehicle. , A combination of hue 506, contrast 507, and adjustment value of backlight 508 are stored in association with each other.

  The distance 501 between the own vehicle and the intersection is information indicating the distance between the intersection that should make a right or left turn on the recommended route and the position of the vehicle to which the navigation device 100 is attached, for example, “100 m”. For example, it is information specifying a specific distance or a predetermined range such as “100 m to 200 m”.

  The travel frequency 502 is information indicating the frequency of travel of the host vehicle on a road to which the current position of the host vehicle, which is a vehicle to which the navigation device 100 is attached, belongs. For example, it is information indicating the number of times of passing or entering during a predetermined period.

  The traveling speed 503 is a traveling speed of the vehicle that is the vehicle to which the navigation device 100 is attached. For example, a predetermined speed such as “30 km / h” or a predetermined range such as “20 km / h to 30 km / h” is specified. Information.

  The distance 504 from the own vehicle is information indicating the distance between the drawing position and the position of the vehicle to which the navigation device 100 is attached. For example, a specific distance such as “100 m” or “100 m It is information specifying a predetermined range such as “˜200 m”.

  The density 505 is information for specifying the color intensity of the area when the area on the drawing target screen is displayed. For example, the density 505 may store a value for specifying a predetermined density, or may store an increase / decrease amount of light and shade with respect to the predetermined density.

  The hue 506 is information for specifying the hue of the area when displaying the area on the drawing target screen. For example, the hue 506 stores information indicating a tendency of a predetermined color (cold color, warm color, etc.).

  The contrast 507 is information that determines the degree to which the distribution of gradation values and composite values of a predetermined channel is dispersed with respect to the gradation values of R, G, and B channels that constitute each pixel of the display area and the total value thereof. It is. For example, a histogram for the R channel in the display area is formed and expressed by a coefficient or the like for dispersing the histogram.

  The backlight 508 is information that specifies the light emission degree of the backlight of the display screen. That is, the higher the value of the backlight 508, the higher the light emission level of the backlight.

  Using the adjustment determination table 502, the image processing unit 108 uses the distance between the own vehicle and the intersection, the traveling frequency, the traveling speed, and the density, the hue, the contrast, and the light emission amount of the backlight corresponding to the distance from the own vehicle. And make a drawing adjustment.

  By deforming in this way, for example, in steps S202 to S204 of the drawing adjustment process, it is possible to execute a process for specifying density, hue, and contrast at a time. In addition, since an optimum combination of density, hue, and contrast can be determined in advance, it is possible to give a sense of unity to the appearance of drawing on the display screen.

  Moreover, in the said embodiment, although the example of a display was shown on the assumption that the own vehicle position periphery or a driving | running route is made conspicuous, it is not restricted to this, Various display forms can be considered. For example, the area around an arbitrary facility or point may be divided as a close-up drawing area, and attributes such as density, hue, and contrast may be changed to make the area stand out.

  In this way, information desired by the user can be displayed without excess or deficiency.

  Further, in the above embodiment, in step S202, which is a process for specifying the density in the drawing adjustment process, the density is determined by determining the travel frequency for the road included in the adjustment area. However, the present invention is not limited to this. Instead, for example, the concentration may be determined by obtaining the traveling frequency only for the link to which the vehicle belongs.

  The above is an example of modification.

  In the above embodiment, an example in which the present invention is applied to a vehicle-mounted navigation device has been described. However, the present invention can also be applied to a navigation device other than a vehicle-mounted navigation device.

DESCRIPTION OF SYMBOLS 1 ... Display, 2 ... Memory | storage device, 3 ... Voice input / output device, 4 ... Input device, 5 ... ROM device, 6 ... CPU, 7 ... RAM, 8. ..ROM, 9 ... vehicle speed sensor, 10 ... gyro sensor, 11 ... GPS receiver, 12 ... FM multiplex broadcast receiver, 13 ... beacon receiver, 14 ... bus, DESCRIPTION OF SYMBOLS 31 ... Microphone, 32 ... Speaker, 41 ... Touch panel, 42 ... Dial switch, 100 ... Navigation device, 101 ... Measurement position detection part, 102 ... Congestion information acquisition part, DESCRIPTION OF SYMBOLS 103 ... Map information storage part, 104 ... Route search part, 105 ... Current position calculation part, 106 ... Vehicle information acquisition part, 107 ... Adjustment information storage part, 108 ... Image processing Part, 109... Display part, 1 0 ... backlight control unit

Claims (14)

A navigation device comprising a display unit,
A driving status acquisition unit that acquires the driving status of the vehicle;
A division processing unit that divides information to be displayed on the display unit into a plurality of display areas;
For each display area divided by the division processing unit, a drawing processing unit that changes and displays at least one drawing attribute among contrast, density, and hue in accordance with the traveling state acquired by the traveling state acquisition unit;
A navigation device characterized by comprising: The navigation device according to claim 1, further comprising:
A storage unit storing information for specifying a route to be guided;
The division processing unit, in the process of dividing the information to be displayed, divides the region including the path stored in the storage unit separately from other regions;
A navigation device characterized by that. The navigation device according to claim 2,
The traveling state acquisition unit acquires a speed at which the vehicle travels,
The drawing processing unit changes the drawing attribute according to the speed acquired by the traveling state acquisition unit.
A navigation device characterized by that. The navigation device according to claim 2 or 3, further comprising:
The travel status acquisition unit acquires the current position of the vehicle,
The drawing processing unit changes the drawing attribute according to the current position acquired by the traveling state acquisition unit.
A navigation device characterized by that. The navigation device according to any one of claims 2 to 4,
The drawing processing unit draws a display area at a position far from the current position acquired by the traveling state acquisition unit darker than a display area at a position near the current position;
A navigation device characterized by that. The navigation device according to any one of claims 2 to 5, further comprising:
The travel status acquisition unit acquires the travel frequency of the road on which the vehicle traveled,
The drawing processing unit acquires a traveling frequency of a road on which the vehicle is traveling by the traveling state acquisition unit, and changes the drawing attribute of the road according to the acquired traveling frequency.
A navigation device characterized by that. The navigation device according to claim 4, further comprising:
The travel status acquisition unit acquires a distance between an intersection that needs to make a right or left turn on the route and the current position of the vehicle,
The drawing processing unit changes the drawing attribute according to a distance between the intersection acquired by the traveling state acquisition unit and the current position of the vehicle.
A navigation device characterized by that. The navigation device according to any one of claims 1 to 7,
The drawing processing unit adjusts a gradation value for each position included in the display area in the process of changing the drawing attribute;
A navigation device characterized by that. The navigation device according to any one of claims 2 to 8,
In the process of dividing the information to be displayed, the division processing unit includes an area including the route and an area around the route stored in the storage unit, an area including the route, and an area around the route. To separate from other areas not included in the area,
A navigation device characterized by that. The navigation device according to claim 1,
In the process of dividing the information to be displayed, the division processing unit divides the area including the area around the vehicle position from other areas.
A navigation device characterized by that. The navigation device according to claim 10,
The drawing processing unit sets the contrast of the other region to be lower than the contrast of the region including the region around the vehicle position;
A navigation device characterized by that. The navigation device according to claim 11, further comprising:
The travel status acquisition unit acquires the current position of the vehicle,
The drawing processing unit changes the drawing attribute according to the current position acquired by the traveling state acquisition unit.
A navigation device characterized by that. The navigation device according to any one of claims 10 to 12,
The drawing processing unit adjusts a gradation value for each position included in the display area in the process of changing the drawing attribute;
A navigation device characterized by that. A display method of a navigation device including a display unit,
The navigation device
A driving status acquisition procedure for acquiring the driving status of the vehicle;
A division processing procedure for dividing information to be displayed on the display unit into a plurality of display areas;
For each display area divided by the division processing procedure, a drawing processing procedure for changing and displaying at least one drawing attribute among contrast, density, and hue according to the driving situation acquired by the driving situation acquisition unit;
The display method characterized by implementing.

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