JP2015172548A - Display control device, control method, program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display control device that allows a driver to suitably grasp a feel of the distance between the current position and a position corresponding to displayed guide information.SOLUTION: A head-up display 2 includes a light source unit 4 and a combiner 9. The light source unit 4 includes a control part 55 that performs control of acquiring guide images indicating guide information on the transport and displays the guide images to be apparently overlapped on the landscape on a combiner 9. The control part 55 sets the transparency of each of the guide images on the basis of a display target distance LD, which is the distance between the current position and a point related to each of the guide images. The control part 55 displays each of the guide images on the combiner 9 on the basis of the set transparency.

Description

  The present invention relates to a technique for displaying an image superimposed on a front landscape.

  2. Description of the Related Art Conventionally, there is a technique for preventing a virtual image from becoming difficult to see due to the scenery behind the head-up display or the like. For example, Patent Document 1 discloses a technique for transmitting and displaying information that overlaps a superimposition prohibition object in a captured image when displaying information superimposed on a photographed image. In general, in a head-up display or the like, a technique for reducing the display size of a guide image for an object existing far away is known.

JP 2011-242934 A

  In general, when guidance information is displayed over a front landscape with a head-up display or the like, there are a plurality of types of guidance information to be displayed, and the standard display size differs for each type. Therefore, in a mode in which the display size is reduced as the guidance information for an object located far away, the driver determines the absolute positional relationship between the position of the guidance target of each type of guidance information and the current position of the guidance information. It is difficult to grasp by the display mode.

  The present invention has been made to solve the above-described problems, and allows the driver to intuitively grasp the sense of distance between the position corresponding to the displayed guidance information and the current position. The main object is to provide a control device.

  The invention described in the claims includes a display control unit that performs control to display the first guidance information and the second guidance information, a first distance from a reference location to a location related to the first guidance information, A distance acquisition unit that acquires a second distance from a reference location to a location related to the second guidance information, a first transmittance and a first display range according to the first distance, and the second distance A display mode acquisition unit that acquires a second transparency and a second display range according to the display, and the display control unit displays the first guidance information at the first transparency and in the first display range. And controlling to display the second guidance information in the second transmission range and in the second display range.

  The invention described in the claims is a control method executed by the display control device, wherein the display control step performs control for displaying the first guidance information and the second guidance information, and the first control from the reference location. A distance acquisition step of acquiring a first distance to the place related to the guide information and a second distance from the reference place to the place related to the second guide information; and a first distance corresponding to the first distance A display mode acquisition step of acquiring a first transmittance, a first display range, a second transmittance and a second display range according to the second distance, and the display control step includes the first transmittance. In addition, the first guide information is displayed in the first display range, and the second guide information is displayed in the second transmission range and the second display range.

  The invention described in the claims is a program executed by a computer, wherein a display control unit that performs control to display the first guidance information and the second guidance information, and the first guidance information from a reference location. A distance acquisition unit that acquires a first distance to a related location and a second distance from the reference location to a location related to the second guidance information, and a first transmittance according to the first distance And the first display range, the second transmission range according to the second distance, and the display mode acquisition unit for acquiring the second display range, the computer to function, the display control unit at the first transmission The first guide information is displayed in the first display range, and the second guide information is displayed in the second transmission range and the second display range.

1 shows a schematic configuration of a display system. 1 shows a schematic configuration of a navigation device. 1 shows a schematic configuration of a head-up display. The schematic structure of a light source unit is shown. It is a flowchart which shows the procedure of the transmittance | permeability adjustment process. The relationship between the display object distance which concerns on the 1st setting example, and the transmittance | permeability of a guidance image is shown. The relationship between the display object distance which concerns on a 2nd setting example, and the transmittance | permeability of a guidance image is shown. The front scenery and guide image visually recognized through a combiner are shown. The guidance image displayed on a combiner is shown. The schematic structure of the display system which concerns on a modification is shown. It is the example of a display of the display which displayed the guidance image on the front image. It is a display example of the guidance image on the combiner which concerns on a modification. It is a display example of the guidance image on the combiner which concerns on a modification.

  In one preferred embodiment of the present invention, the display control device includes a display control unit that performs control for displaying the first guidance information and the second guidance information, and a location related to the first guidance information from a reference location. A distance acquisition unit that acquires the first distance to the second distance to the place related to the second guidance information from the reference place, the first transmittance according to the first distance, and the first A display mode acquisition unit configured to acquire a display range, a second transparency according to the second distance, and a second display range, wherein the display control unit has the first transparency and the first display range. The first guidance information is displayed, and the second guidance information is displayed in the second display range with the second transparency.

  The display control device includes a display control unit, a distance acquisition unit, and a display mode acquisition unit. The display control unit performs control to display the first guidance information and the second guidance information. The distance acquisition unit acquires a first distance from a reference location to a location related to the first guidance information and a second distance from the reference location to a location related to the second guidance information. The display mode acquisition unit acquires the first transparency and the first display range according to the first distance, and the second transparency and the second display range according to the second distance. Here, the display control unit performs control to display the first guidance information at the first transparency and the first display range, and to display the second guidance information at the second transparency and the second display range. According to this aspect, the display control device can make the user intuitively grasp the sense of distance from the reference location to the location related to each guidance information based on the transparency of each guidance information.

  In one aspect of the display control device, when the first distance and the second distance are equal, the first display range is larger than the second display range, the first transmission and the second transmission are equal, and the first distance is As the length becomes longer, the first display range becomes smaller and the first transmittance increases, and as the second distance becomes longer, the second display range becomes smaller and the second transmittance increases. Here, “when the first distance and the second distance are equal” is not limited to the case where the first distance and the second distance are completely the same, but may be different within a predetermined distance range. It may be included. According to this aspect, when displaying guidance information with different reference display sizes, the display control device gives the user a sense of distance from the reference location to the location related to each guidance information based on the transparency of each guidance information. It can be intuitively grasped.

  In one aspect of the display control device, the display control unit differs in reflectivity of the display unit between the first guide information and the second guide information when the first distance and the second distance are different. Display in the area. According to this aspect, the display control apparatus can appropriately display each piece of guide information with the set transparency without adjusting the light amount for displaying the guide information for each piece of guide information.

  In another aspect of the display control device, the display unit includes regions having different reflectivities, and the display control unit is configured to display the first and second guidance information based on the first and second transmittances. An area for displaying each of these is determined. In this aspect, the display control device can display the guide information with appropriate transparency by controlling the display position of the guide information.

  In another aspect of the display control device, the display unit can change a reflectance for each predetermined unit area, and the display control unit can change the first based on the first and second transmittances. And the reflectance of the area | region which displays each of 2nd guidance information is changed. In this aspect, the display control apparatus can display the guidance information with appropriate transparency regardless of the display position of the guidance information.

  In another aspect of the display control device, the display mode acquisition unit includes a first transmittance according to the speed of the moving body that moves with the display control device and the first distance, the speed, and the second. The second transparency according to the distance is acquired. According to this aspect, the display control device can suitably set the transparency of each piece of guide information according to the time until the place related to the guide information and the reference place pass each other.

  In another aspect of the display control device, the display control unit causes the display unit to display each of the first and second guidance information with overlapping displays based on the first and second transmittances. . According to this aspect, even when the guidance information is displayed in an overlapping manner, the display control device can cause the driver to appropriately grasp the sense of distance from the reference location to the location related to each guidance information.

  In another aspect of the display control device, the display control unit is configured to display the first display only when the first distance and the second distance are equal and the first display range is larger than the second display range. The first and second guidance information is displayed based on the second transparency. According to this aspect, the display control device can make the driver intuitively understand that the distance from the reference location to the location corresponding to each guidance information is the same based on the transparency of each guidance information.

  In still another embodiment of the present invention, a control method executed by the display control device, the display control step for performing control to display the first guidance information and the second guidance information, and the first from the reference location. A distance acquisition step of acquiring a first distance to the place related to the guide information and a second distance from the reference place to the place related to the second guide information; and a first distance corresponding to the first distance A display mode acquisition step of acquiring a first transmittance, a first display range, a second transmittance and a second display range according to the second distance, and the display control step includes the first transmittance. The first guidance information is displayed in the first display range, and the second guidance information is displayed in the second transmission range and the second display range. By executing this control method, the display control device can make the user intuitively grasp the sense of distance from the reference location to the location related to each guide information based on the transparency of each guide information.

  In still another embodiment of the present invention, a program executed by a computer, the display control unit performing control to display the first guidance information and the second guidance information, and the first guidance information from a reference location A distance acquisition unit that acquires a first distance to a related location and a second distance from the reference location to a location related to the second guidance information, and a first transmittance according to the first distance And the first display range, the second transmission range according to the second distance, and the display mode acquisition unit for acquiring the second display range, the computer to function, the display control unit at the first transmission In addition, the first guide information is displayed in the first display range, and the second guide information is displayed in the second transmission range and the second display range. By executing this program, the computer can make the user intuitively grasp the sense of distance from the reference location to the location related to each guide information based on the transparency of each guide information. Preferably, the program is stored in a storage medium.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[Schematic configuration]
(1) System Configuration FIG. 1 shows a configuration example of a display system 100 according to the embodiment. As shown in FIG. 1, the display system 100 is mounted on a vehicle Ve, and includes a navigation device 1 and a head-up display 2.

  The navigation device 1 has a function of performing route guidance from a departure place to a destination. The navigation device 1 can be, for example, a stationary navigation device installed in the vehicle Ve, a portable terminal such as a PND (Portable Navigation Device), or a smartphone.

  The head-up display 2 is an apparatus that generates an image (also referred to as a “guide image”) that displays information for assisting driving and visually recognizes the guide image as a virtual image from the position (eye point) of the driver's eyes. . The head-up display 2 displays, for example, an arrow indicating the direction of the guide route, information on a guide point such as a right / left turn point, information on traveling of the vehicle Ve such as a vehicle speed, information indicating a facility mark, and a forward direction as a guide image. Display information and information on traffic regulations. The head-up display 2 is supplied from the navigation device 1 with various information necessary for generating a guide image such as guide route information.

  When the navigation device 1 is a mobile terminal such as a smartphone, the navigation device 1 may be held by a cradle or the like. In this case, the navigation device 1 may exchange information with the head-up display 2 via a cradle or the like.

(2) Configuration of Navigation Device FIG. 2 shows the configuration of the navigation device 1. As shown in FIG. 2, the navigation device 1 includes a self-supporting positioning device 10, a GPS receiver 18, a system controller 20, a disk drive 31, a data storage unit 36, a communication interface 37, a communication device 38, an interface 39, and a display unit 40. A voice output unit 50 and an input device 60.

  The autonomous positioning device 10 includes an acceleration sensor 11, an angular velocity sensor 12, and a distance sensor 13. The acceleration sensor 11 is made of, for example, a piezoelectric element, detects the acceleration of the vehicle Ve, and outputs acceleration data. The angular velocity sensor 12 is composed of, for example, a vibrating gyroscope, detects the angular velocity of the vehicle Ve when the direction of the vehicle Ve is changed, and outputs angular velocity data and relative azimuth data. The distance sensor 13 measures a vehicle speed pulse composed of a pulse signal generated with the rotation of the wheel of the vehicle Ve.

  The GPS receiver 18 receives radio waves 19 carrying downlink data including positioning data from a plurality of GPS satellites. The positioning data is used to detect the absolute position (also referred to as “current position”) of the vehicle Ve from latitude and longitude information.

  The system controller 20 includes an interface 21, a CPU (Central Processing Unit) 22, a ROM (Read Only Memory) 23, and a RAM (Random Access Memory) 24, and controls the entire navigation apparatus 1.

  The interface 21 performs an interface operation with the acceleration sensor 11, the angular velocity sensor 12, the distance sensor 13, and the GPS receiver 18. From these, vehicle speed pulses, acceleration data, relative azimuth data, angular velocity data, GPS positioning data, absolute azimuth data, and the like are input to the system controller 20. The CPU 22 controls the entire system controller 20. The ROM 23 includes a nonvolatile memory (not shown) in which a control program for controlling the system controller 20 is stored. The RAM 24 stores various data such as route data preset by the user via the input device 60 so as to be readable, and provides a working area to the CPU 22.

  A system controller 20, a disk drive 31 such as a CD-ROM drive or a DVD-ROM drive, a data storage unit 36, a communication interface 37, a display unit 40, an audio output unit 50, and an input device 60 are mutually connected via a bus line 30. It is connected to the.

  The disk drive 31 reads and outputs content data such as music data and video data from a disk 33 such as a CD or DVD under the control of the system controller 20. The disk drive 31 may be either a CD-ROM drive or a DVD-ROM drive, or may be a CD and DVD compatible drive.

  The data storage unit 36 is configured by, for example, an HDD and stores various data used for navigation processing such as map data. The map data includes road data represented by links corresponding to roads and nodes corresponding to road connecting portions, facility information about each facility, and the like. The facility information includes, for example, guide image information such as a facility mark to be displayed for each registered facility and position information of the facility.

  The communication device 38 includes, for example, an FM tuner, a beacon receiver, a portable terminal, a dedicated communication module, and the like. Receive road traffic information such as traffic information and other information. In addition, the communication device 38 transmits to the head-up display 2 various information used for navigation processing, such as current position information acquired from the GPS receiver 18, information such as vehicle speed pulses acquired from the autonomous positioning device 10, and map data. To do.

  The display unit 40 displays various display data on a display device such as a display under the control of the system controller 20. Specifically, the system controller 20 reads map data from the data storage unit 36. The display unit 40 displays the map data read from the data storage unit 36 by the system controller 20 on the display screen. The display unit 40 includes a graphic controller 41 that controls the entire display unit 40 based on control data sent from the CPU 22 via the bus line 30 and a memory such as a VRAM (Video RAM), and can display image information that can be displayed immediately. A buffer memory 42 that temporarily stores, a display control unit 43 that controls display of a display 44 such as a liquid crystal display or a CRT (Cathode Ray Tube) based on image data output from the graphic controller 41, and a display 44 are provided. . The display 44 functions as an image display unit, and includes, for example, a liquid crystal display device having a diagonal of about 5 to 10 inches and is mounted near the front panel in the vehicle.

  The audio output unit 50 performs D / A (Digital to Analog) conversion of audio digital data sent from the CD-ROM drive 31, DVD-ROM 32, RAM 24, or the like via the bus line 30 under the control of the system controller 20. A D / A converter 51 to perform, an amplifier (AMP) 52 that amplifies the audio analog signal output from the D / A converter 51, and a speaker 53 that converts the amplified audio analog signal into sound and outputs the sound into the vehicle. It is prepared for.

  The input device 60 includes keys, switches, buttons, a remote controller, a voice input device, and the like for inputting various commands and data. The input device 60 is disposed around the front panel and the display 44 of the main body of the in-vehicle electronic system mounted in the vehicle. When the display 44 is a touch panel system, the touch panel provided on the display screen of the display 44 also functions as the input device 60.

(3) Configuration of Head-Up Display FIG. 3 is a schematic configuration diagram of the head-up display 2. As shown in FIG. 3, the head-up display 2 according to the present embodiment includes a light source unit 4 and a combiner 9. The vehicle Ve includes a front window 25, a ceiling portion 27, a hood 28, a dashboard 29, and the like. It is attached.

  The light source unit 4 is installed on the ceiling portion 27 in the passenger compartment via the support members 5a and 5b, and emits light constituting a guide image indicating information for assisting driving toward the combiner 9 so that the combiner 9 The driver is caused to visually recognize the virtual image “Iv”.

  The combiner 9 projects the display image emitted from the light source unit 4 and reflects the display image to the driver's eye point “Pe” to display the display image as a virtual image Iv. And the combiner 9 has the support shaft part 8 installed in the ceiling part 27, and rotates the support shaft part 8 as a spindle. The support shaft portion 8 is installed, for example, in the vicinity of the ceiling portion 27 in the vicinity of the upper end of the front window 25, in other words, the position where a sun visor (not shown) for the driver is installed. The support shaft portion 8 may be installed instead of the above-described sun visor. The combiner 9 is an example of the “display unit” in the present invention.

(4) Configuration of Light Source Unit FIG. 4 is a diagram schematically showing the configuration of the light source unit 4. As illustrated in FIG. 4, the light source unit 3 includes a light source 54, a control unit 55, and a communication unit 56.

  The light source 54 includes, for example, red, blue, and green laser light sources, and emits light (also referred to as “display light”) that constitutes a display image to be irradiated to the combiner 9 based on the control of the control unit 55. .

  The communication unit 56 receives various types of information used for navigation processing from the navigation device 1 based on the control of the control unit 55. For example, the communication unit 56 receives information necessary for generating a guidance image such as guidance route information and current position information from the navigation device 1.

  The control unit 55 includes a CPU, a ROM that stores a control program executed by the CPU, data, and the like, and a RAM that sequentially reads and writes various data as a work memory when the CPU operates. Control.

  The control unit 55 generates a guide image based on information transmitted from the navigation device 1 and causes the light source 54 to emit display light constituting the guide image. For example, the control unit 55 recognizes an object (also referred to as “display object Dtag”) on which a guidance image such as a facility or an intersection in the forward landscape is displayed, and displays the display object Dtag at a position corresponding to the display object Dtag. A guide image showing information on the information is displayed.

  Moreover, the control part 55 adjusts the transmittance | permeability by which each guide image is displayed on the combiner 9 by adjusting the brightness | luminance (lightness) of each guide image. This control will be described in detail in the section [Transmissivity adjustment processing]. The control unit 55 functions as a “display control unit”, a “distance acquisition unit”, a “display mode acquisition unit”, and a computer that executes a program in the present invention.

[Transmissivity adjustment processing]
Next, a transmittance adjustment process for adjusting the transmittance of the guide image displayed on the combiner 9 will be described. Schematically, the control unit 55 guides such that the longer the distance between the current position and the display target Dtag (also referred to as “display target distance LD”), the higher the transmittance of the guide image of the display target Dtag. Adjust the brightness of the image. Thereby, the control part 55 keeps the visibility of a front scenery suitably, making a driver | operator grasp intuitively the distance to the display object Dtag corresponding to each guidance image.

(1) Processing Flow FIG. 5 is a flowchart showing the procedure of transmittance adjustment processing according to the present embodiment. The control unit 55 repeatedly executes the process of the flowchart shown in FIG.

  First, the control unit 55 recognizes a display target Dtag on which a guide image is to be displayed (step S101). In this case, the control unit 55 first recognizes the position and traveling direction of the vehicle Ve based on the measurement information of the GPS receiver 18 received from the navigation device 1 and the measurement information of the self-supporting positioning device 13. And the control part 55 is within the predetermined angle from the advancing direction of the vehicle Ve, Comprising: The thing with which the guidance image which should be displayed is registered into map data among the facilities, intersections, etc. which exist in the vicinity of the vehicle Ve, Recognized as a display target Dtag.

  Next, the control unit 55 determines the display position of the guide image corresponding to each display target Dtag (step S102). For example, the control unit 55 calculates the position on the combiner 9 where each display target Dtag is visually recognized based on a known viewpoint conversion process or the like, and uses the calculated display position of the display target Dtag on the combiner 9 as a reference image. The display position of is determined.

  Next, the control unit 55 calculates a display target distance LD that is a distance between the current position and the display target Dtag (step S103). In this case, for each display target Dtag, the control unit 55 sets the distance between the position of the display target Dtag registered in the map data and the current position indicated by the measurement information of the GPS receiver 18 as the display target distance LD. calculate.

And the control part 55 sets the transmittance | permeability and display size of the guidance image corresponding to each display object Dtag according to the display object distance LD (step S104). An example of setting the transmittance in step S104 will be described later. In this case, the control unit 55 determines the display size of each guide image so that the display size of the guide image corresponding to each display target Dtag decreases as the display target distance LD increases. And the control part 55 displays each guide image on the combiner 9 with the set transmittance | permeability and display size (step S105). That is, the control unit 55 adjusts the amount of display light emitted to the light source 54 for each guide image according to the set transmittance. As a result, as will be described later, the control unit 55 displays the guide image corresponding to the display target Dtag that is far from the current position so as to be inconspicuous (that is, the transmittance is high) and exists near the current position. The display target Dtag to be displayed is displayed so as to be conspicuously dark (that is, the transmittance is low). Note that the control unit 55 displays a guide image that does not include the display target Dtag, such as a guide image indicating the vehicle speed, with a predetermined transmittance.
(2) Setting example of transmittance Next, a specific example (first setting example, second setting example) of the guide image transmittance setting method executed in step S104 of FIG. 5 will be described with reference to FIGS. I will explain.

  FIG. 6A is a table showing the relationship between the display target distance LD and the guide image transmittance according to the first setting example. FIG. 6B is a graph showing the relationship between the display target distance LD and the transmittance shown in FIG.

  As shown in FIGS. 6A and 6B, in the first setting example, the control unit 55 sets the guide image transmittance higher as the display target distance LD is shorter at a short distance within 2 m from the current position. To do. As a result, the control unit 55 naturally disappears the display of the guidance image of the passing display target Dtag. Further, the control unit 55 increases the transmittance of the guide image as the display target distance LD is longer at a position 3 m or more away from the current position, and sets the transmittance to 100% when the display target distance LD is 300 m or longer. To hide the guide image. By doing in this way, the control part 55 displays the guidance image of the display object Dtag farther from the current position so as not to obstruct the driver's field of view, and preferably ensures the visibility of the front landscape.

  Next, a second setting example will be described. In the second setting example, the control unit 55 sets the transmittance in consideration of the traveling speed of the vehicle Ve in addition to the display target distance LD.

  FIG. 7A is a table showing the relationship between the display target distance LD and the guide image transmittance according to the second setting example. FIG. 7A shows the transmittance for each display target distance LD when traveling at a speed of 30 km / h and the transmittance for each display target distance LD when traveling at a speed of 80 km / h. In addition, in FIG. 7A, for reference, in addition to the transmittance, the estimated arrival time (that is, the time until passing each other) at the display target Dtag when the speed is 30 km / h and the speed is 80 k / m is shown. Yes. FIG. 7B is a graph showing the relationship between the display target distance LD and the transmittance shown in FIG. Here, the graph G1 shows the relationship between the display target distance LD and the transmittance when traveling at 30 km / h, and the graph G2 shows the relationship between the display target distance LD and the transmittance when traveling at 80 km / h. .

  As shown in FIGS. 7A and 7B, in the second setting example, the control unit 55 is based on the estimated arrival time at the display target Dtag that is proportional to the display target distance LD and inversely proportional to the vehicle speed. The transmittance is set. Specifically, when the estimated arrival time is less than 1 second, the control unit 55 sets the transmittance higher as the display target distance LD is shorter, and sets the transmittance lower as the vehicle speed is slower. That is, in this case, the control unit 55 sets the transmittance higher as the estimated arrival time is shorter. Further, when the estimated arrival time is 1 second or longer, the control unit 55 sets the transmittance lower as the display target distance LD is shorter, and sets the transmittance higher as the vehicle speed is slower. That is, in this case, the control unit 55 sets the transmittance higher as the estimated arrival time is longer.

  Thus, in the second setting example, the control unit 55 sets the transmittance of the guide image of each display target Dtag according to the time until the vehicle Ve and the display target Dtag pass each other. Thereby, the control part 55 can ensure the visibility to a driver | operator's front scenery suitably by making the transmittance | permeability of the guidance image of the display object Dtag with a long time until passing each other high.

(3) Display Example Next, a display example in the present embodiment will be described. FIG. 8 shows a forward landscape and a guide image that are visually recognized through the combiner 9. In the example of FIG. 8, the control unit 55 includes, as a guide image, a guide route image 81 indicating a route to turn left at the next intersection 72 to be passed, and a guide point (intersection 72 in FIG. 8) to be next turned left and right An arrow image 82 indicating the traveling direction, a distance display image 83 indicating the distance to the guide point, and facility mark images 84A to 84C indicating facility marks for each facility (facility 74A to 74C in FIG. 8) are displayed in the forward scenery. Overlaid on the combiner 9.

  As illustrated in FIG. 8, the control unit 55 sets the transmittance of each guide image 81 to 84 based on the display target distance LD that is the distance to the corresponding display target Dtag. Specifically, the control unit 55 gradually changes the transmittance at each position of the guide route image 81 so as to increase as the distance between the position on the corresponding road 71A, 71B and the current position increases. ing. The control unit 55 sets the transparency of the arrow image 82 and the distance display image 83 based on the display target distance LD with respect to the intersection 72 corresponding to the display target Dtag. In FIG. 8, the control unit 55 sets the transparency of the arrow image 82 and the distance display image 83 to be the same as the portion corresponding to the road 71 </ b> B of the guide route image 81.

  In addition, the control unit 55 sets the transmittance of the facility mark images 84A to 84C based on the display target distances LD for the facilities 74A to 74C corresponding to these display targets Dtag. Specifically, the control unit 55 makes the transmittance of the facility mark image 84C corresponding to the facility 74C farthest from the current position among the facilities 74A to 74C the highest, and the facility corresponding to the facility 74A closest to the current position. The transmittance of the mark image 84A is made the lowest.

  Moreover, the control part 55 determines the display size of each corresponding guide image 81-84 based on display object distance LD. Specifically, the control unit 55 displays each guide image 81 to 84 based on the reference size of each guide image 81 to 84 determined according to the type of each guide image 81 to 84 and each display target distance LD. The size is determined. Here, the “reference size” indicates the display size of the guide image when the display target distance LD is a predetermined reference distance, for example, the size of the guide image registered in advance in map data or the like. In this case, the control unit 55 determines the display size of each guide image 81 to 84 so that the display size of each guide image 81 to 84 decreases as the display target distance LD increases.

  As described above, the control unit 55 sets the transmittance of the corresponding guide image based on the display target distance LD regardless of the type of the display target Dtag. Thereby, the driver can intuitively grasp the sense of distance to the display target Dtag corresponding to each guide image, regardless of the content displayed by the guide image. In addition, the control unit 55 can display the guide image of the display target Dtag farther from the current position so as to be thin so as not to disturb the driver's field of view, and can preferably ensure the visibility of the front landscape.

  The effect by the display based on a present Example is further supplementally demonstrated with reference to FIG. FIG. 9 shows an example in which two different types of first guide images 85A to 85C and second guide images 86A to 86C are displayed on the combiner 9. Here, each display target Dtag corresponding to the first guide image 85A and the second guide image 86A exists closest, and each display target Dtag corresponding to the first guide image 85C and the second guide image 86C is farthest away. It shall exist.

  In the example of FIG. 9, the first guide images 85A to 85C and the second guide images 85A to 85C have different display shapes and reference sizes (that is, display sizes when the display target distance LD is a predetermined distance). The first guide images 85A to 85C and the second guide images 85A to 85C change so that the display size decreases as the corresponding display target distance LD increases. Further, the first guide images 85A to 85C and the second guide images 86A to 86C have overlapping portions, respectively. Thus, in the example of FIG. 9, it is difficult to grasp the perspective of the corresponding display target Dtag only by the display position, size, shape, and the like of each guide image.

  Even in this case, the control unit 55 sets the transmittance of each of the first guide images 85A to 85C and the second guide images 85A to 85C higher as the corresponding display target distance LD is longer. Then, the control unit 55 sets the first guide image 85A and the second guide image 86A having the same display target distance LD to the same transmittance, and the first guide image 85B and the second guide image having the same display target distance LD. 86B is set to the same transmittance, and the first guide image 85C and the second guide image 86C having the same display target distance LD are set to the same transmittance. Thereby, the control part 55 can make a driver | operator intuitively grasp the sense of perspective of the display target Dtag corresponding to each guide image regardless of the type of the guide image. In addition, even when the guide images are overlapped, the driver can preferably grasp the perspective of the display target Dtag with respect to these guide images.

  In the example of FIG. 9, the first guide images 85A to 85C are an example of “first guide information” in the present invention, and the second guide images 86A to 86C are “second guide information” in the present invention. It is an example.

  As described above, the head-up display 2 according to the present embodiment includes the light source unit 4 and the combiner 9. The control unit 55 of the light source unit 4 performs control to acquire a guidance image indicating guidance information regarding movement and display the guidance image on the combiner 9 so as to be superimposed on the apparent scenery. Further, the control unit 55 sets the display transparency of each guide image based on the display target distance LD that is the distance between the point of the display target Dtag related to each of the guide images and the current position. And the control part 55 displays each guide image on the combiner 9 based on the set transparency. Thereby, the head-up display 2 can make a driver | operator intuitively grasp | ascertain the distance to each display object Dtag based on the transparency of the guidance image with respect to each display object Dtag.

[Modification]
Hereinafter, modified examples suitable for the above-described embodiments will be described. The following modifications may be applied in any combination to the above-described embodiments.

(Modification 1)
Instead of displaying the guidance image superimposed on the front landscape by the head-up display 2, the display system 100 causes the navigation device 1 to display the guidance image superimposed on the image captured by the camera that captures the front landscape. Also good.

  FIG. 10 shows a configuration example of a display system 100A according to a modification. A display system 100 </ b> A illustrated in FIG. 10 includes a camera 3. The camera 3 is fixed toward the front of the vehicle Ve, and generates an image (also referred to as “front image Im”) obtained by capturing the front of the vehicle Ve at predetermined intervals. The camera 3 supplies the generated front image Im to the navigation device 1.

  The system controller 20 of the navigation device 1 causes the display 44 to display the guidance image superimposed on the front image Im acquired from the camera 3. FIG. 11 is a display example of the display 44 in which the same guide images 81 to 84 as the display example of FIG. 8 are superimposed on the front image Im. In the example shown in FIG. 11, the system controller 20 sets the transmittance of each guide image 81 to 84 higher as the display target distance LD with respect to each display target Dtag is longer, as in the example of FIG. 8. Thereby, the control part 55 can make a driver | operator intuitively grasp | ascertain the distance feeling of the display target Dtag corresponding to each guidance image similarly to the example of FIG. In addition, the control unit 55 can display the guide image of the display target Dtag farther from the current position so as to be thin so as not to disturb the driver's field of view, and can preferably ensure the visibility of the front landscape.

(Modification 2)
Instead of adjusting the transmittance of the guide image displayed on the combiner 9 by changing the brightness of the guide image, the control unit 55 adjusts the display position of each guide image on the combiner 9 having regions with different reflectivities. By doing so, the transmittance of each guide image may be adjusted.

  FIG. 12 shows a display example of the guidance image on the combiner 9A according to the modification. The combiner 9A shown in FIG. 12 has a first region 91H and a second region 91L having different reflectivities, and the reflectivity in the first region 91H is set higher than the reflectivity in the second region 91L. .

  In FIG. 12, the control unit 55 determines the display position of each guide image 82 to 84 based on the display target distance LD for each guide image 82 to 84. Specifically, the control unit 55 displays a guide image (facility mark image) 84 that should be displayed with relatively high transmittance on the first area 91H, and guide images 82 to 82 that should be displayed with relatively low transmittance. 83 is displayed on the second area 91L. As a result, the guide image (facility mark image) 84 is displayed with a lower transmittance (that is, higher luminance) than the guide images 82 to 83. In this case, the control unit 55 causes the light source 54 to emit display light constituting each of the guide images 82 to 84 with the same amount of light.

  Here, a specific description will be given of a specific method for determining the display position of the guide image. In the first example, for each guide image 82 to 84, the control unit 55 has the first area 91H or the area where the display close to the target transmittance set based on the first or second setting example can be realized. It is determined which of the two areas 91L. In this case, the control unit 55 may store in advance a table or the like indicating which of the first area 91H or the second area 91L is displayed for each set target transmittance. In the second example, the control unit 55 stores in advance a table or the like indicating which of the first area 91H or the second area 91L is displayed for each display target distance LD. And the control part 55 determines the display area on the combiner 9 of the guide images 82-84 with reference to the above-mentioned table from the display object distance LD calculated with respect to each guide image 82-84.

  Thus, also by this modification, the control part 55 can adjust the transmittance | permeability of a corresponding guide image suitably according to display object distance LD.

  In the example of FIG. 12, the combiner 9 </ b> A has two regions with different reflectivities, but may instead have three or more regions with different reflectivities. Thereby, the control unit 55 can adjust the transmittance of the guide image with higher accuracy.

(Modification 3)
The head-up display 2 has a combiner capable of electronically controlling the transmittance for each predetermined unit area, and controls the transmittance of the unit area that overlaps the display position of each guide image, thereby reducing the transmittance of each guide image. You may adjust.

  FIG. 13 shows a display example of the combiner 9B according to this modification. The combiner 9B illustrated in FIG. 13 is, for example, a light control glass capable of controlling the transmittance for each predetermined unit region, and is electrically connected to the control unit 55. In FIG. 13, the control unit 55 displays the facility mark images 84 </ b> A to 84 </ b> C whose transmittances set based on the first or second setting example described in FIGS. 6 and 7 are 0%, 50%, and 80%, respectively. It is displayed on the combiner 9B.

  In this case, the control unit 55 sets the transmittance of the rectangular area 92H including the facility mark image 84A, the rectangular area 92M including the facility mark image 84B, and the rectangular area 92L including the facility mark image 84C to the respective facility mark images 84A to 84C. Control is performed so that the transmittance is set for. Specifically, the control unit 55 transmits a control signal to the combiner 9B so that the transmittance of the rectangular region 92H is 0%, the transmittance of the rectangular region 92M is 50%, and the transmittance of the rectangular region 92L is 80%. Set to. Further, the control unit 55 controls the combiner 9B so that the transmittance is 100% with respect to the region 92T of the combiner 9B other than the rectangular regions 92H, 92M, and 92L where the guide image is displayed.

  As described above, in this modification, the control unit 55 does not adjust the transmittance of the guide image displayed on the combiner 9 by changing the luminance of the guide image, but the display position of each guide image and the set transmission value. The transmittance of the combiner 9B is adjusted for each unit area according to the rate. Also by this, the control unit 55 can display each guide image with an appropriate transmittance according to the display target distance LD. Moreover, the control part 55 can ensure suitably the visibility to a driver | operator's front scenery by making the transmittance | permeability 100% in the area | region where the guidance image is not displayed.

(Modification 4)
The controller 55 may adjust the saturation in addition to the luminance (brightness) when adjusting the transmittance of the guide image. For example, when increasing the transmittance of the guide image, the control unit 55 decreases the luminance and the saturation of the guide image. Further, when reducing the transmittance of the guide image, the control unit 55 increases the luminance and the saturation of the guide image. Thereby, the control part 55 can make a driver | operator visually recognize a guidance image clearly and effectively, so that the target transmittance | permeability is low.

(Modification 5)
In FIG. 3, the head-up display 2 has a combiner 9 and makes the driver visually recognize the virtual image Iv based on the emitted light of the light source unit 4 reflected by the combiner 9. However, the configuration to which the present invention is applicable is not limited to this. Instead of this, the head-up display 2 may not have the combiner 9 and may allow the driver to visually recognize the virtual image Iv based on the emitted light of the light source unit 4 reflected by the windshield 25.

  Further, the position of the light source unit 4 is not limited to the case where it is installed on the ceiling portion 27. Instead of this, the light source unit 4 may be installed on the dashboard 29 or installed inside the dashboard 29. When installed on the dashboard 29, the combiner 9 is provided on the dashboard 29, or light is directly reflected from the light source unit 4 on the windshield 25 to allow the driver to recognize the virtual image Iv. When installed in the dashboard, the dashboard 29 is provided with an opening for allowing light to pass through the combiner 9 or the windshield 25.

  Further, the display system 100 may include a head mounted display for mounting instead of the head up display 2 mounted on the vehicle Ve, as a device that displays a virtual image superimposed on the front scenery. In this case, the head mounted display may cause the guide image to be visually recognized as the virtual image Iv when the user walks. Even in this case, the head mounted display can appropriately set the transmittance of each guide image by executing the flowchart of FIG.

(Modification 6)
The system controller 20 may execute part of the processing of the control unit 55. For example, the system controller 20 may generate a guide image for the head-up display 2 to display, and the light source unit 4 of the head-up display 2 may receive the guide image. In this case, the system controller 20 executes the process of the flowchart of FIG. 5 instead of the control unit 55. Then, in step S105 of FIG. 5, the system controller 20 displays each guide image by transmitting, for example, an instruction signal to display each guide image with the transmittance set in step S104 to the light source unit 4. The display is performed with an appropriate transmittance according to the target distance LD.

  In this modification, the system controller 20 functions as a “display control unit”, a “distance acquisition unit”, a “display mode acquisition unit”, and a computer that executes a program in the present invention.

  In another example, the head-up display 2 may have a part or all of the functions of the navigation device 1. In this case, the light source unit 4 may include, for example, a memory that stores map data, sensors such as a GPS receiver, and the like.

(Modification 7)
Instead of using the distance between the current position and the display target Dtag as the display target distance LD, the display system 100 may set the distance between the position specified by the user and the display target Dtag as the display target distance LD. In this case, the display system 100 includes, for example, an information terminal that can display a map, and the information terminal accepts an input for designating an arbitrary position on the displayed map. And an information terminal acquires the image image | photographed from the position on the designated map from a server apparatus via a network etc., and displays the said image. Then, the information terminal regards a facility or the like existing in the displayed image as the display target Dtag, and calculates a display target distance Dtag from the designated position to the display target Dtag. Then, the information terminal determines the transparency and display size of the guide image of each display target Dtag according to the display target distance Dtag, and superimposes it on the image taken from the specified position on the map. To display. Thus, in this modification, the designated position on the map is an example of the “reference place” in the present invention.

(Modification 8)
In the description of FIG. 9, the control unit 55 sets the transparency of the guide images having the same display target distance LD to the same value. Instead, the control unit 55 considers that the display target distances LD are equal when the display target distances LD are within a predetermined difference, and sets the transparency of the corresponding guide images to the same value. Good.

(Modification 9)
As in the example of FIG. 9, the control unit 55 sets the transparency set based on the display target distance LD only when the guide images having the same display target distance LD and different types (that is, reference sizes) are displayed simultaneously. These guidance images may be displayed by the above. That is, the control unit 55 displays the guide images based on the display target distance LD only when the guide images having different reference sizes are displayed at the same time, and only when the display target distances LD of the display targets Dtag indicated by these control images are equal. Display with the same transparency. Also by this, the driver can appropriately recognize the display target Dtag existing at the same distance from the current position based on the transparency of the guide image.

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Head-up display 4 Light source unit 9 Combiner 25 Windshield 28 Bonnet 29 Dashboard 100 Display system

Claims (11)

A display control unit that performs control to display the first guidance information and the second guidance information;
A distance acquisition unit that acquires a first distance from a reference location to a location related to the first guidance information and a second distance from the reference location to a location related to the second guidance information;
A display mode acquisition unit that acquires a first transmittance and a first display range according to the first distance, and a second transmittance and a second display range according to the second distance;
The display control unit is configured to display the first guidance information at the first transmission level and the first display range, and to display the second guidance information at the second transmission level and the second display range. A display control device. When the first distance and the second distance are equal, the first display range is larger than the second display range, and the first transmittance and the second transmittance are equal,
As the first distance increases, the first display range decreases, and the first transparency increases, and as the second distance increases, the second display range decreases, and the The display control apparatus according to claim 1, wherein the second transparency increases.   When the first distance and the second distance are different, the display control unit displays the first guidance information and the second guidance information in regions having different reflectivities of the display unit. The display control apparatus according to claim 1 or 2. The display unit has areas with different reflectivities,
The display control apparatus according to claim 3, wherein the display control unit determines a region in which each of the first and second guidance information is displayed based on the first and second transmittances. The display unit can freely change the reflectance for each predetermined unit area,
The display control according to claim 3, wherein the display control unit changes a reflectance of a region in which each of the first and second guidance information is displayed based on the first and second transmittances. apparatus.   The display mode acquisition unit obtains a first transmittance according to the speed of the moving body that moves together with the display control device and the first distance, and a second transmittance according to the speed and the second distance. The display control apparatus according to claim 1, wherein the display control apparatus acquires the display control apparatus.   7. The display control unit according to claim 1, wherein the display control unit causes the display unit to display each of the first guidance information and the second guidance information with overlapping displays based on the first and second transmittances. The display control apparatus according to any one of the above.   The display control unit is based on the first and second transmittances only when the first distance and the second distance are equal and the first display range is larger than the second display range. The display control apparatus according to claim 1, wherein the second guidance information is displayed. A control method executed by a display control device,
A display control step for performing control to display the first guidance information and the second guidance information;
A distance acquisition step of acquiring a first distance from a reference location to a location related to the first guidance information and a second distance from the reference location to a location related to the second guidance information;
A display mode acquisition step of acquiring a first transmittance and a first display range according to the first distance, and a second transmittance and a second display range according to the second distance;
In the display control step, the first guide information is displayed in the first display range and the first display range, and the second guide information is displayed in the second display range and the second display range. The control method characterized by performing. A program executed by a computer,
A display control unit that performs control to display the first guidance information and the second guidance information;
A distance acquisition unit that acquires a first distance from a reference location to a location related to the first guidance information and a second distance from the reference location to a location related to the second guidance information;
Causing the computer to function as a display mode acquisition unit that acquires the first transmittance and the first display range according to the first distance, and the second transmittance and the second display range according to the second distance;
The display control unit is configured to display the first guidance information at the first transmission level and the first display range, and to display the second guidance information at the second transmission level and the second display range. A program characterized by that.   A storage medium storing the program according to claim 10.