JP2019061088A - Virtual image display unit, virtual image display method, and virtual image display program - Google Patents

Abstract

To provide a virtual image display unit, a virtual image display method, and a virtual image display program that can display an image according to a user's eyesight to improve visibility.SOLUTION: A virtual image display unit 100 comprises: an eyesight acquisition unit 21; a display information acquisition unit 22; a display image creation unit 23; and a projection processing unit 25. The eyesight acquisition unit 21 acquires a user's eyesight, and the display information acquisition unit 22 acquires information to be displayed. The display image creation unit 23 creates a display image for displaying an image corresponding to the information acquired by the display information acquisition unit 22 according to the eyesight acquired by the eyesight acquisition unit 21. The projection processing unit 25 performs projection processing of projecting the display image created by the display image creation unit 23 as a virtual image.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a virtual image display device, a virtual image display method, and a virtual image display program.

  A virtual image display device such as a head-up display mounted on a vehicle transmits light entering from the outside of the vehicle and reflects a display image projected from an optical unit disposed in the vehicle to a windshield of the vehicle, etc. Display a virtual image superimposed on the landscape of The virtual image display apparatus can recognize the information of the image projected from the optical unit with almost no change in the line of sight or focus of the user viewing the scene outside the vehicle.

  When the amount of information of the display image displayed by the virtual image display device increases, the individual images included in the display image become finer, and the visibility decreases depending on the user's visual acuity. Patent Document 1 discloses a display control device capable of determining a driver's visual state while getting on a vehicle. This display control device calculates the size of the Landord ring corresponding to the legal vision required for the operation according to the distance from the display device displaying the Landord ring used for visual acuity measurement to the eye point of the user, Display the ring. If the user can recognize the notch direction of the displayed Landodox ring, it can grasp that it has legal vision.

JP 2005-096645 A

  In the display control device described in Patent Document 1, it can be understood that the user's visual acuity has legal visual acuity, but when the visual acuity has legal visual acuity but is relatively low, the detail displayed inside and outside the vehicle The visibility to the image can not be improved.

  In particular, a virtual image display device tends to include more information in a display image because a user who is visually recognizing the outside of a vehicle can recognize a virtual image with little change in the line of sight or focus, and the user's visual acuity is low. In this case, the visibility of the displayed image is low.

  The present invention has been made in view of such circumstances, and the object of the present invention is to provide a virtual image display apparatus capable of displaying an image according to the user's visual acuity and enhancing visibility, a virtual image display method, and a virtual image It is to provide a display program.

  The virtual image display apparatus according to an aspect of the present invention includes the visual acuity acquisition unit for acquiring the visual acuity of the user, a display information acquisition unit for acquiring information to be displayed, and an image corresponding to the information acquired by the display information acquisition unit. A display image generation unit that generates a display image to be displayed according to the visual acuity acquired by the visual acuity acquisition unit, and a projection processing unit that performs a projection process that projects the display image generated by the display image generation unit as a virtual image.

  Another aspect of the present invention is a virtual image display method. In this virtual image display method, the visual acuity acquisition step acquires an image corresponding to the information acquired by the visual information acquisition step of acquiring the visual acuity of the user, the display information acquisition step of acquiring the information to be displayed, and the display information acquisition step. And a projection processing step of performing a projection process of projecting the display image generated in the display image generation step as a virtual image, in a display image generation step of generating a display image to be displayed according to the visual acuity.

  According to the present invention, it is possible to display an image according to the user's eyesight and to improve visibility.

FIG. 1 is a side view schematically showing a configuration of a virtual image display device according to an embodiment. It is a block diagram showing composition of a virtual image display. It is a schematic diagram which shows an example of the display image displayed as a virtual image. It is a chart showing an example of a priority order table. It is a flowchart which shows the procedure of a virtual image display process. It is a schematic diagram which shows an example of the display image displayed as a virtual image at the time of vision measurement. It is a schematic diagram which shows an example of the display image displayed as a virtual image according to the vision. It is a schematic diagram which shows an example of the display image displayed as a virtual image according to the vision. It is a schematic diagram which shows an example of the display image at the time of visual acuity measurement in a modification. It is a side view showing typically the composition of the virtual image display concerning a modification.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to FIG. 1 to FIG. The same or equivalent constituent elements and members shown in the respective drawings are denoted by the same reference numerals, and redundant description will be omitted as appropriate. In addition, dimensions of members in each drawing are shown appropriately enlarged or reduced for easy understanding. In each drawing, a part of members which are not important in describing the embodiment is omitted and displayed.

(Embodiment)
FIG. 1 is a side view schematically showing the configuration of a virtual image display device 100 according to the embodiment. The virtual image display device 100 is disposed, for example, in the dashboard or on the dashboard below the windshield 90 of the vehicle, and displays the virtual image 60 in front of the windshield 90 or the combiner. In the virtual image display device 100, the projection unit 30 emits image display light based on the display image output from the control unit 20, reflects the light by the projection mirror 40, and projects the light on the windshield 90 or the combiner. The virtual image display device 100 reflects the projected image display light by the windshield 90 or the combiner, projects the virtual image 60 superimposed on the landscape outside the vehicle in front of the windshield, and provides it to the user.

  The virtual image display device 100 includes an image corresponding to, for example, the traveling speed of the vehicle, vehicle information such as the temperature of the engine and the remaining amount of fuel, external environment information such as the outside air temperature, and information on road signs such as the maximum speed. Generate a display image. The virtual image display device 100 also generates a display image including an image corresponding to current position information and route guidance information acquired from a map display device such as a navigation device mounted on a vehicle.

  The virtual image display device 100 increases or decreases the amount of information contained in the display image according to the acquired user's visual acuity, changes the size of the image corresponding to each information, generates a display image, and displays it as a virtual image. The virtual image display device 100 according to the embodiment described below can be used not only in vehicles but also in aircraft, game machines, entertainment facilities, etc., and can be miniaturized and used as a wearable device. You can also.

  FIG. 2 is a block diagram showing the configuration of the virtual image display device 100. As shown in FIG. The virtual image display device 100 includes an input unit 10, a storage unit 11, a control unit 20, a projection unit 30, and a projection mirror 40. The input unit 10 includes switches such as operation keys, arrow keys, and a touch panel, and receives an operation input by the user. The input unit 10 may be, for example, a touch panel incorporated in a display device. In addition to the operation input, the input unit 10 may also correspond to an input by another means such as a voice input or a gesture input. The storage unit 11 is configured by a data storage device such as a random access memory (RAM), a flash memory, a hard disk storage device, etc., and stores a priority order table 11a described later.

  The control unit 20 includes a vision acquisition unit 21, a display information acquisition unit 22, a display image generation unit 23, a priority setting unit 24, and a projection processing unit 25. The control unit 20 is constituted by, for example, a CPU, and executes the processing by the above-described units according to a computer program stored in a non-volatile memory (not shown) and various information used for the computer program.

  In the control unit 20, the vision acquisition unit 21 acquires the vision by measuring the user's vision. The visual acuity acquisition unit 21 sequentially displays the visual acuity measurement image (for example, a Landordo ring or the like) generated by the display image generation unit 23 as a virtual image in front of the windshield 90, and the user's reply to each visual acuity measurement image By acquiring from the input unit 10, the visual acuity of the user is measured.

  For example, a plurality of visual acuity measurement images are prepared from small to large outer dimensions, and correspond to the height of the visual acuity. For example, the control unit 20 sequentially displays the vision measurement images corresponding to the visual acuity of 0.3 to 1.5 as the virtual image in front of the windshield 90, and the user's reply to each vision measurement image is input unit 10 Get from For example, when displaying the Landordo ring as a virtual image as an image for vision measurement, the user inputs an answer from the input unit 10 as to whether the side with the notch in each Landordo ring is up, down, left or right. To get The vision acquisition unit 21 determines whether the user's answer to each vision measurement image is correct or incorrect, and acquires the maximum vision for which the correct answer is obtained as the user's vision. Vision measurement can be further enhanced by various algorithms such as trying several measurements.

  Further, the eyesight acquiring unit 21 may acquire the eyesight input by the user through the input unit 10. In this case, the user needs to know how much his or her vision is. However, even if the user knows his or her own visual acuity by means of a separate visual acuity test etc., the visual acuity changes depending on the difference in day and night and the feeling of fatigue of the eyes etc. It is preferable to perform vision measurement by reflecting a virtual image forward.

  The display information acquisition unit 22 acquires information to be displayed on the virtual image 60 from the external device 80. The information to be displayed includes, for example, information on the traveling speed of the vehicle, information on the vehicle such as the engine temperature and fuel consumption, information on the external environment such as the outside temperature, information on road traffic regulations such as the maximum speed, and current position information and route guidance information is there. The external device 80 is an electronic control device mounted on a vehicle, a map display device such as a car navigation device, a VICS receiving device for receiving road traffic information from VICS (Vehicle Information and Communication System), and a drive recorder And the like.

  The display information acquisition unit 22 acquires information on the vehicle and information on the external environment from the electronic control unit mounted on the vehicle. The display information acquisition unit 22 mainly acquires information on road traffic regulation, current position information and route guidance information from the map display device, but when the VICS receiver and the external imaging device are mounted on a vehicle, these are also obtained. Each piece of information may be acquired from the device of

  The display image generation unit 23 generates a display image including an image corresponding to each information input from the display information acquisition unit 22, and outputs the display image to the projection unit 30. FIG. 3 is a schematic view showing an example of a display image displayed as a virtual image, and FIG. 4 is a chart showing an example of the priority order table 11a. The display image A shown in FIG. 3 is an image having a rectangular area whose width and height directions have predetermined pixel dimensions, and image data corresponding to various information is arranged in this area.

  The display image A includes a traveling speed image 50 showing the traveling speed of the vehicle, an engine information image 51 showing the engine temperature etc., a maintenance speed image 52 showing the maintenance speed of the automatic traveling control, and a collision warning of a collision against the preceding vehicle. A warning image 53 is included. Vehicle information such as traveling speed, engine information, maintenance speed, and collision warning is obtained from an electronic control unit mounted on the vehicle. Each piece of information is monitored or controlled in an electronic control device such as a speedometer system, an engine control system, an automatic travel control system, and a collision prevention control system. Further, the outside air temperature image 54 a is generated based on the outside air temperature information measured by the outside air temperature sensor with which the electronic control device is provided to monitor the outside environment.

  Further, the display image A includes a reception broadcast station image 54b as in-vehicle information. Information on the receiving station is obtained from the audio device. The reception broadcast station image 54b displays frequencies such as AM broadcast, FM broadcast, and television broadcast, a channel number, a broadcast station name, and the like.

  Further, the display image A includes an image for displaying information on road traffic regulation. For example, the display image A is a restriction sign image 55 such as the maximum speed image 55a and the parking prohibition image 55b, a warning sign image 56 indicating that the road is under construction or slippery, a national road number, a municipality, a direction and a distance The guide sign image 57 etc. which show etc are displayed. Information on road signs such as restriction signs, warning signs, and guide signs included in the display image A is acquired by the display information acquisition unit 22 corresponding to the current position of the vehicle and extracted by the map display device. Further, as the information of the road sign, information of the road sign extracted by image analysis from an image captured by the external imaging device provided in the vehicle may be used.

  Further, the display image A includes a route guidance image 58 regarding route guidance provided by the map display device. The map display device connects the current position and the destination based on the route setting information including the destination input by the user, the route setting condition and the like, and creates a route candidate applicable to the route setting condition based on the map data. The route setting condition is, for example, a condition such as a short moving time or a short distance. The map display device performs route guidance in real time so that the vehicle travels according to the set route selected by the user from among the created route candidates. The display image generation unit 23 causes the display image A to include the route guidance image 58 based on the route guidance information acquired by the display information acquisition unit 22 from the map display device. The route guidance image 58 shown in FIG. 3 guides turning 200 m ahead to the right.

  Also, although not included in the display image A shown in FIG. 3, it is possible to acquire road traffic information provided by the VICS from the VICS receiver and display traffic congestion information images and traffic regulation images by road construction etc. Good.

  The display image generation unit 23 changes the arrangement of the above-described images in the display image area and changes the display size (size) in accordance with the user's vision acquired by the vision acquisition unit 21. The display image generation unit 23 enlarges the display size of each image when the user's vision is low, and reduces the display size when the user's vision is high. The display image generation unit 23 selects an image to be included in the display image based on the priority table 11 a stored in the storage unit 11 in order to suppress an increase in the entire display image when the display size of each image is increased. Change the amount of information to generate a display image. The display image generation unit 23 generates a display image by increasing the amount of information when the visual acuity is high and reducing the amount of information except for information with low priority when the visual acuity is low. When the visual acuity is low, the display image generation unit 23 mutually sets each image corresponding to the high priority information in the area of the display image including the space generated by excluding the image corresponding to the low priority information. Adjust the positional relationship of to change the layout, and increase the external dimensions of each image.

  The priority order is set for each information at a stage of, for example, "low", "medium", and "high" as in the priority order table 11a shown in FIG. When the user's visual acuity acquired by the visual acuity acquiring part 21 is high (for example, when the visual acuity is 1.2 or more), the display image generation part 23 has low, medium and high priority shown in FIG. 4. Generate a display image that includes everything. In addition, when the visual acuity of the user acquired by the visual acuity acquiring part 21 is medium (for example, when the visual acuity is not less than 0.8 and less than 1.2), the display image generating part 23 excludes those with low priority. Generate a display image that includes medium and high. In addition, when the user's visual acuity acquired by the visual acuity acquiring part 21 is low (for example, when the visual acuity is less than 0.8), the display image generation part 23 excludes high and low priority ones. Generate a display image to include.

  The priority setting unit 24 acquires the priority that the user inputs to the input unit 10, initializes the priority table 11a, and changes it as needed. The priority stored in the priority table 11a may be set by default. Further, when the user inputs the priority by the input unit 10, the control unit 20 generates a display image for displaying the information name, the category, and the priority to be selected by the display image generation unit 23, and displays the virtual image 60 to display priority. It is good to be able to choose the order.

  The projection processing unit 25 performs projection processing for projecting the display image generated by the display image generation unit 23 as a virtual image. The projection processing unit 25 controls the luminance and display timing of an image displayed by the projection image display unit 31 described later, the luminance and the operation timing of the light source 32, and the like in the projection processing. The projection processing unit 25 instructs the display image generation unit 23 to output the generated display image to the projection image display unit 31 and causes the projection image display unit 31 to display the input display image. To command. The projection processing unit 25 also controls the display image luminance of the projection image display unit 31 and the luminance of the light source 32 based on information such as an illuminance sensor (not shown).

  The projection unit 30 accommodates an optical system (not shown) including a projection image display unit 31, a light source 32, various optical lenses, and a mirror. The projection unit 30 generates and displays image display light based on the display image. The projection image display unit 31 may be, for example, a liquid crystal on silicon (LCOS) as a reflective liquid crystal display panel, a liquid crystal display (LCD) as a transmissive liquid crystal panel, or a digital light processing DLP using a digital mirror device. ) Is used. The projection image display unit 31 displays the display image input from the display image generation unit 23, is irradiated with light from the light source 32, and image display light generated by the reflection or transmission thereof is transmitted to the projection mirror 40 through the optical system. Projected The luminance and display timing of the image displayed by the projection image display unit 31, the luminance and operation timing of the light source 32, and the like are controlled by the projection processing unit 25 as described above.

  The projection image display unit 31 may be an image display device including an element that emits light by itself, such as an organic EL (Electro Luminescence), a fluorescent display tube (Vacuum Fluorescent Display), or a light emitting diode (LED). In addition, the projection unit 30 may be laser light scanning by a transmissive liquid crystal or a micro electro mechanical systems (MEMS) mirror.

  The projection mirror 40 is configured by, for example, a concave mirror. The projection mirror 40 reflects the image display light projected from the projection unit 30 to change the direction of the image display light to the direction of the windshield 90 or the combiner.

  Next, the operation of the virtual image display device 100 according to the embodiment will be described. FIG. 5 is a flowchart showing the procedure of the virtual image display process. The eyesight acquiring unit 21 of the control unit 20 measures the eyesight of the user based on the eyesight measurement image (for example, a Landordo ring or the like) displayed as a virtual image 60 in front of the windshield 90 (S1). FIG. 6 is a schematic view showing an example of a display image displayed as a virtual image at the time of vision measurement. The display image shown in FIG. 6 includes a display of a Landordo ring as a vision measurement image, that the vision is being measured, and that the user is prompted to answer.

  The user inputs the direction of the notch of the land ring by the input unit 10. The visual acuity acquisition unit 21 outputs a signal indicating that the user's answer has been acquired from the input unit 10 to the display image generation unit 23 and the projection processing unit 25. The display image generation unit 23 and the projection processing unit 25 sequentially display the vision measurement image as a virtual image. The vision acquisition unit 21 determines whether the user's answer to each vision measurement image is correct or incorrect, and acquires the maximum vision for which the correct answer is obtained as the user's vision (S2). The eyesight acquiring unit 21 may acquire the eyesight input by the user through the input unit 10.

  The display information acquisition unit 22 acquires information to be displayed as the virtual image 60 from the external device 80 (S3). As described above, the information acquired by the display information acquiring unit 22 is information on a vehicle, information on an external environment, information on road traffic regulation, current position information, route guidance information, and the like.

  The display image generation unit 23 determines whether the visual acuity acquired by the visual acuity acquisition unit 21 is high (S4), and determines that the visual acuity is high (S4: YES), all information acquired by the display information acquisition unit 22 A display image including the corresponding image is generated (S5). For example, when the user's eyesight acquired by the eyesight acquiring unit 21 is 1.2 or more, the display image generation unit 23 determines that the eyesight is high. The display image generated by the display image generation unit 23 is, for example, the display image A shown in FIG. 3 and is set to “low”, “medium” and “high” in the priority order in the priority order table 11 a shown in FIG. Contains each image corresponding to the

  In step S4, when the visual acuity is not high and it is determined as “No” (S4: NO), the display image generation unit 23 determines whether the visual acuity acquired by the visual acuity acquisition unit 21 is middle (S6) . If the display image generation unit 23 determines in step S6 that the visual acuity is moderate (S6: YES), the priority order in the priority table 11a is “low” in the information acquired by the display information acquisition unit 22. A display image including an image corresponding to the information set to "medium" and "high" is generated (S7).

  For example, the display image generation unit 23 determines that the visual acuity is middle when the visual acuity of the user acquired by the visual acuity acquisition unit 21 is not less than 0.8 and less than 1.2. FIG. 7 is a schematic view showing an example of a display image displayed as a virtual image according to the eyesight. The display image generation unit 23 generates, for example, a display image B illustrated in FIG. 7 when the user's visual acuity is moderate. In display image B, traveling speed image 50, engine information image 51, maintenance speed image 52 and collision warning image 53 as vehicle information, maximum speed image 55a and warning sign image 56 as restriction information, route guidance as route guidance information An image 58 is included.

  In step S6, when it is determined that the visual acuity is not medium but "No" (S6: NO), the display image generation unit 23 determines that the visual acuity acquired by the visual acuity acquisition unit 21 is low, and the display information acquisition unit 22 Among the information, a display image including an image corresponding to the information set to "high" is generated except for the ones with "low" and "medium" priority in the priority table 11a (S8). In this case, the display image generation unit 23 determines, for example, that the user's eyesight is less than 0.8. FIG. 8 is a schematic view showing an example of a display image displayed as a virtual image according to the eyesight. The display image generation unit 23 generates, for example, a display image C illustrated in FIG. 8 when the user's vision is low. The display image C includes a traveling speed image 50 as vehicle information, a maximum speed image 55a and a warning sign image 56 as restriction information, and a route guidance image 58 as route guidance information.

  The display image generation unit 23 changes the size of each image corresponding to the information on the vehicle, the information on the external environment, the information on road traffic regulation, the current position information, the route guidance information, etc. according to the user's vision. , And the visibility of the display image can be enhanced. The display image generation unit 23 generates a display image by changing the amount of information based on the priority order table 11a. The display image generation unit 23 increases the amount of information when the visual acuity is high, and when the visual acuity is low, generates a display image excluding information with a low priority to improve the visibility of the display image. it can.

  The priority order of each information in the priority order table 11a can be changed by acquiring the priority order input to the input unit 10 by the user using the priority order setting unit 24. Therefore, the information required by the user is prioritized as a virtual image It can be displayed as 60.

  The visual acuity acquisition unit 21 acquires the user's answer to the visual acuity measurement image projected forward of the windshield 90 as the virtual image 60, and determines whether the user's answer is correct or not, thereby obtaining the maximum visual acuity for which the correct answer is obtained. Acquire as the eyesight of the user. The virtual image display device 100 can obtain the visual acuity at the start of driving by measuring the visual acuity before starting the driving operation while the user is in the vehicle, and it is possible to obtain the visual acuity at the start of driving. The visibility of the display image can be enhanced according to the changing visual acuity.

(Modification)
The display image generation unit 23 may set the color of the image corresponding to each information included in the display image based on the hue, lightness and saturation of the color input by the user. The virtual image display device 100 displays a color setting screen on which a color sample of hue, lightness and saturation is displayed as a virtual image, and changes the color of each image displayed on the display image based on color setting information input by the user. .

  The color sample shall be displayed by changing the hue, lightness and saturation continuously or intermittently and can be selected by the user. The color sample is displayed by changing from a specific color (for example, blue) to another specific color (for example, red), and can be selected by the user. The display image generation unit 23 changes the image corresponding to each piece of information so as to be corrected by the selected color.

  The user can set, for example, the display image in the daytime to be strong in blue and the display image in the nighttime to be strong in red according to the preference of the color. The virtual image display device 100 can further enhance the visibility by generating a display image by changing the color of the image displayed on the display image. In addition, the user may store the color setting information of the user in one or more types in the storage unit 11 so that the user can call and use the color setting information. In this case, a plurality of users can use the storage unit 11 to store color setting information having high visibility of the image for the user.

  Furthermore, in the embodiment, the visual acuity measurement images are displayed as virtual images one by one at the time of measuring the visual acuity of the user, but a plurality of visual acuity measurement images may be displayed. FIG. 9 is a schematic view showing an example of a display image at the time of visual acuity measurement in the modification. The display image shown in FIG. 9 includes a plurality of Landdod rings as visual acuity measurement images, a display indicating that visual acuity measurement is in progress, and a prompt for the user's response.

  The user selects one of the plurality of land circles and inputs the direction of the notch through the input unit 10. When the user sequentially selects the Landord ring and all the answers are completed, the vision acquisition unit 21 determines whether the user's answer to each vision measurement image is correct or incorrect, and uses the maximum vision for which the correct answer is obtained as the user's vision. get.

  In the embodiment, the virtual image display device 100 projects the display image on the windshield 90, but may project it on the combiner. FIG. 10 is a side view schematically showing the configuration of a virtual image display device 100 according to a modification. The virtual image display device 100 is disposed, for example, in a dashboard below the windshield 90 of the vehicle or on the dashboard, and displays a virtual image 60 in front of the combiner 41. In the virtual image display device 100, the projection unit 30 emits the image display light based on the display image output from the control unit 20, reflects the light by the projection mirror 40, and projects the light on the combiner 41.

  The combiner 41 is a half mirror and is disposed on the inner side of the windshield 90. The user recognizes the image in which the virtual image 60 is superimposed on the landscape outside the vehicle viewed through the windshield 90. As a result, the user can observe the virtual image 60 through the windshield 90, and thus can obtain information while moving the sight line during driving operation.

Next, features of the virtual image display device 100, the virtual image display method, and the virtual image display program according to the embodiment and the modification will be described.
The virtual image display device 100 includes a vision acquisition unit 21, a display information acquisition unit 22, a display image generation unit 23, and a projection processing unit 25. The vision acquisition unit 21 acquires the vision of the user, and the display information acquisition unit 22 acquires information to be displayed. The display image generation unit 23 generates a display image in which an image corresponding to the information acquired by the display information acquisition unit 22 is displayed according to the visual acuity acquired by the visual acuity acquisition unit 21. The projection processing unit 25 performs projection processing for projecting the display image generated by the display image generation unit 23 as a virtual image. As a result, the virtual image display device 100 displays an image according to the visual acuity, so the visibility of the display image can be enhanced.

  Further, the display image generation unit 23 changes the display dimensions of the image corresponding to the information acquired by the display information acquisition unit 22 according to the visual acuity acquired by the visual acuity acquisition unit 21. Thus, the virtual image display device 100 can increase the visibility of a display image by reducing the image when the visual acuity is high and enlarging the image when the visual acuity is low.

  Further, the display image generation unit 23 changes the amount of information included in the display image according to the visual acuity acquired by the visual acuity acquisition unit 21. As a result, the virtual image display device 100 can increase the amount of information when the visual acuity is high, and reduce the amount of information when the visual acuity is low, thereby enhancing the visibility of the display image.

  The priority setting unit 24 sets the priority of the information acquired by the display information acquisition unit 22. The display image generation unit 23 changes the amount of information included in the display image based on the set priority. Thereby, the virtual image display apparatus 100 can improve the visibility of a display image by generating a display image excluding information with low priority when the visual acuity is low.

  Further, the visual acuity acquisition unit 21 acquires visual acuity based on the user's answer to the visual acuity measurement image projected as a virtual image. Thereby, the virtual image display device 100 can acquire the visual acuity in the state where the user is on the vehicle. By performing the vision measurement before starting the driving operation, it is possible to acquire the vision at the start of the driving.

  Further, the vision acquisition unit 21 acquires the vision at the start of driving of the vehicle. Thus, the virtual image display device 100 can improve the visibility of the display image according to the visual acuity at the start of driving by acquiring the visual acuity before the user starts driving.

  Further, the display image generation unit 23 generates a display image based on the user's input on the display image of the color sample projected as a virtual image. Thereby, the virtual image display device 100 can further improve the visibility by changing the color of the image to be displayed on the display image to generate the display image.

  The virtual image display method further includes a vision acquisition step, a display information acquisition step, a display image generation step, and a projection processing step. The vision acquisition step acquires the user's vision, and the display information acquisition step acquires information to be displayed. The display image generation step generates a display image that displays an image corresponding to the information acquired in the display information acquisition step in accordance with the visual acuity acquired in the visual acuity acquisition step. The projection processing step performs projection processing for projecting the display image generated in the display image generation step as a virtual image. According to this virtual image display method, since the image according to the visual acuity is displayed, the visibility of the display image can be enhanced.

  In addition, the virtual image display program causes the computer to execute a vision acquisition step, a display information acquisition step, a display image generation step and a projection processing step. The vision acquisition step acquires the user's vision, and the display information acquisition step acquires information to be displayed. The display image generation step generates a display image that displays an image corresponding to the information acquired in the display information acquisition step in accordance with the visual acuity acquired in the visual acuity acquisition step. The projection processing step performs projection processing for projecting the display image generated in the display image generation step as a virtual image. According to this virtual image display program, an image according to the eyesight is displayed, so that the visibility of the display image can be enhanced.

  The above has been described based on the embodiment of the present invention. It is understood by those skilled in the art that these embodiments are exemplifications, and that various modifications and alterations are possible within the scope of the present invention, and such variations and modifications are also within the scope of the present invention. It is about to be Accordingly, the descriptions and drawings herein are to be considered as illustrative and not restrictive.

21 vision acquisition unit, 22 display information acquisition unit, 23 display image generation unit,
24 Priority setting unit, 25 projection processing unit, 100 virtual image display device.

Claims (9)

A vision acquisition unit for acquiring the user's vision;
A display information acquisition unit that acquires information to be displayed;
A display image generation unit that generates a display image that displays an image corresponding to the information acquired by the display information acquisition unit according to the visual acuity acquired by the visual acuity acquisition unit;
A projection processing unit that performs projection processing for projecting the display image generated by the display image generation unit as a virtual image;
A virtual image display apparatus comprising:   The virtual image according to claim 1, wherein the display image generation unit changes a display size of an image corresponding to the information acquired by the display information acquisition unit according to the visual acuity acquired by the visual acuity acquisition unit. Display device.   The virtual image display apparatus according to claim 1, wherein the display image generation unit changes an amount of information included in the display image according to the visual acuity acquired by the visual acuity acquisition unit. A priority setting unit configured to set a priority of information acquired by the display information acquisition unit;
The virtual image display apparatus according to claim 3, wherein the display image generation unit changes an amount of information included in the display image based on the set priority.   The virtual image display apparatus according to any one of claims 1 to 4, wherein the visual acuity acquisition unit acquires visual acuity based on a user's answer to the visual acuity measurement image projected as a virtual image.   The virtual image display apparatus according to any one of claims 1 to 5, wherein the visual acuity acquisition unit acquires visual acuity at the start of driving of the vehicle.   The virtual image display apparatus according to any one of claims 1 to 6, wherein the display image generation unit generates a display image based on a user's input to a display image of a color sample projected as a virtual image. . A vision acquisition step for acquiring a user's vision;
A display information acquisition step of acquiring information to be displayed;
A display image generation step of generating a display image for displaying an image corresponding to the information acquired in the display information acquisition step according to the visual acuity acquired in the visual acuity acquisition step;
A projection process step of performing a projection process of projecting the display image generated in the display image generation step as a virtual image;
A virtual image display method comprising: A vision acquisition step for acquiring a user's vision;
A display information acquisition step of acquiring information to be displayed;
A display image generation step of generating a display image for displaying an image corresponding to the information acquired in the display information acquisition step according to the visual acuity acquired in the visual acuity acquisition step;
A projection process step of performing a projection process of projecting the display image generated in the display image generation step as a virtual image;
A virtual image display program characterized by causing a computer to execute.

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