JP2023037911A - Display controller, display control program, and virtual image display system - Google Patents

Abstract

The present invention appropriately optimizes the display quality of a virtual image when there are multiple display positions in the vertical direction of content displayed by a virtual image in front of a moving object. A display control device 2 controls the display mode of a virtual image displayed in front of a moving object. The display control device 2 includes a distortion correction pattern storage section 4a that stores a plurality of distortion correction patterns corresponding to each of a plurality of display positions of content that differ in the vertical direction, and a display position identification section 4b that specifies the display position of the content. and a distortion correction pattern application unit that corrects distortion of the virtual image by applying a distortion correction pattern corresponding to the display position specified by the display position identification unit from among the plurality of distortion correction patterns stored in the distortion correction pattern storage unit. 4c. [Selection diagram] Figure 1

Description

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

For example, there is provided a display control device for controlling a display mode of a virtual image displayed in front of a mobile object such as a vehicle. In this type of configuration, the light imaged as a virtual image is projected toward the projection range of the windshield, and the light projected on the windshield is reflected toward the driver's seat side in the projection range, so that the virtual image is displayed. The driver can visually recognize the content

By the way, the curvature of the windshield is not uniform as a whole but varies in parts. Therefore, there is a problem of distortion of the content displayed by the virtual image. For example, in Patent Document 1, since the driver's eye height varies, a plurality of distortion correction patterns are prepared according to the driver's eye height, and the driver's eye height is selected from among the plurality of distortion correction patterns. A configuration is disclosed in which an optimum distortion correction pattern is selected each time according to the situation and the distortion correction pattern is changed.

Japanese Patent No. 6340383

On the other hand, there are cases where a plurality of content display positions are provided in the vertical direction. When content is displayed at two positions, a lower display position and an upper and lower display position, and a distortion correction pattern optimized for one of the lower display position and the upper display position is prepared, the distortion correction pattern is not displayed at one of the display positions. However, at the other display position, even if the distortion correction pattern is applied, the virtual image cannot be properly distorted. The technique of Patent Literature 1, which prepares a plurality of distortion correction patterns according to the height of the driver's eyes, cannot solve the above-described problem that may occur when content is displayed at a plurality of positions in the vertical direction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and its object is to appropriately display the display quality of the virtual image when the display positions of the content displayed by the virtual image in front of the moving body are set to a plurality of positions in the vertical direction. To provide a display control device, a display control program, and a virtual image display system that can be optimized for

According to the first aspect of the invention, the display mode of the virtual image displayed in front of the moving object is controlled. A distortion correction pattern storage unit (4a) stores a plurality of distortion correction patterns corresponding to each of a plurality of display positions of content that differ in the vertical direction. A display position specifying unit (4b) specifies the display position of the content. A distortion correction pattern application unit (4c) applies a distortion correction pattern corresponding to the display position identified by the display position identification unit from among the plurality of distortion correction patterns stored in the distortion correction pattern storage unit to generate a virtual image. Correct distortion.

A plurality of distortion correction patterns are stored corresponding to each of a plurality of display positions of contents different in the vertical direction, and distortion correction of the virtual image is performed by applying a distortion correction pattern corresponding to the display position from among the plurality of distortion correction patterns. I made it When content is displayed at a plurality of positions in the vertical direction, distortion of the virtual image can be appropriately corrected regardless of the display position of the content, and distortion of the virtual image can be avoided. As a result, the display quality of the virtual image can be appropriately optimized when the display positions of the content displayed by the virtual image in front of the moving object are set to a plurality of positions in the vertical direction.

Functional block diagram showing the first embodiment A diagram schematically showing the configuration of the HUD A diagram showing a distortion correction table The figure which shows the aspect by which a virtual image is imaged. A diagram showing a distortion correction table for comparison The figure which shows the aspect by which the virtual image of comparison object is imaged. flowchart flowchart FIG. 11 shows the second embodiment and shows a distortion correction table; The figure which shows the aspect by which a virtual image is imaged. A diagram showing a distortion correction table for comparison Functional block diagram showing the third embodiment FIG. 4 is a diagram showing a mode of linearly correcting a distortion correction pattern; FIG. 5 is a diagram showing a mode of linearly correcting a distortion correction pattern to be compared;

Hereinafter, some embodiments applied to a display control device mounted on a vehicle as a mobile object will be described with reference to the drawings. In each embodiment shown below, the same reference numerals are given to parts corresponding to the contents described in the preceding embodiments, and redundant description may be omitted. The vertical direction means the height direction of the vehicle, and the horizontal direction means the width direction of the vehicle.

(First embodiment)
A first embodiment will be described with reference to FIGS. 1 to 8. FIG.
As shown in FIG. 1, a virtual image display system 1 mounted on a vehicle includes a meter device 2 and a head-up display (hereinafter referred to as HUD (Head-Up Display)) 3. are connected for data communication. The meter device 2 corresponds to a display control device. The virtual image display system 1 presents, for example, vehicle speed, engine speed, turn-by-turn route display, line-of-sight guidance for detecting pedestrians in front, etc., to the driver or other occupant in the form of a virtual image to assist driving. It is a system to implement. The HUD 3 is mounted on the vehicle as one of a plurality of in-vehicle display devices together with a multi-information display, a center information display, and the like.

The meter device 2 has a function of integrally controlling display by a plurality of in-vehicle display devices including the HUD 3 in the virtual image display system 1 . In addition to the meter device 2, a dedicated device may be prepared for integrally controlling the display by the vehicle-mounted display device. The meter device 2 mainly includes a microcomputer having a control section 4, a RAM 5, a storage section 6, an input/output interface 7, a bus connecting them, and the like.

The control unit 4 is hardware that executes various arithmetic processing in cooperation with the RAM 5, and includes at least one arithmetic core such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit). The control unit 4 may have a configuration including an FPGA (Field-Programmable Gate Array), an NPU (Neural network Processing Unit), an IP (Intellectual Property) core having other dedicated functions, and the like. The control unit 4 accesses the RAM 5 to perform various arithmetic processing and controls the operation of the meter device 2 .

The storage unit 6 includes a nonvolatile storage medium and stores various programs executed by the control unit 4 . Various programs stored in the storage unit 6 include a display control program. The control unit 4 has a function of drawing the original image of the content displayed as a virtual image, and when drawing the original image of the content, the control unit 4 transmits video data including the drawn original image from the input/output interface 7 to the HUD 3 . Upon receiving the video data transmitted from the meter device 2, the HUD 3 displays the content included in the received video data as a virtual image.

As shown in FIG. 2 , the HUD 3 is housed in a housing space within the instrument panel 9 below the windshield 8 . The HUD 3 projects the light imaged as the virtual image Vi toward the projection range PA of the windshield 8 . The light projected onto the windshield 8 is reflected toward the driver's seat in the projection range PA, so that the driver can visually recognize the virtual image Vi.

HUD 3 includes projector 10 and enlarging optical system 11 . The projector 10 includes an LCD (Liquid Crystal Display) panel and a backlight as a light source. The projector 10 is fixed to the housing of the HUD 3 with the display surface of the LCD panel facing the magnifying optical system 11 . The projector 10 displays each frame image of the video data on the display surface of the LCD panel, illuminates the display surface with a light source to form a virtual image Vi, and emits the light toward the magnifying optical system 11 . The magnifying optical system 11 includes a concave mirror formed by vapor-depositing a metal such as aluminum on the surface of a substrate made of synthetic resin, glass, or the like, and is rotatably arranged. The enlarging optical system 11 spreads the light emitted from the projector 10 by reflection and projects the light toward the upper projection range PA.

A field angle VA is set in the HUD 3 . Assuming that the virtual range in the space where the virtual image Vi can be formed by the HUD 3 is an imaging plane IS, the angle of view VA is defined based on a virtual line connecting the driver's eye point EP and the outer edge of the imaging plane IS. viewing angle. The eyepoint EP is a position indicating the eye level of the driver. The angle of view VA is an angle range within which the driver can visually recognize the virtual image Vi when viewed from the eye point EP. In the HUD 3, the horizontal angle of view (eg, about 5-6°) in the horizontal direction is larger than the vertical angle of view (eg, about 2-3°) in the vertical direction. A front range that overlaps with the imaging plane IS when viewed from the eye point EP is within the angle of view VA.

The content displayed as the virtual image Vi includes upper display content and lower display content. The upper display content is, for example, various types of information related to turn-by-turn route display, line-of-sight guidance for detecting pedestrians in front, etc. Display when route guidance to turn left or right or when a pedestrian in front is detected. Displayed only when the conditions are met. The display position of the upper display content may be associated with, for example, a specific superimposed object that exists in the scenery ahead, such as a road surface, a pedestrian, or a road sign, and can be visually moved to follow the superimposed object. For example, when a pedestrian crosses in front of the vehicle, the display position of the upper display content associated with the pedestrian moves in the left-right direction following the movement of the pedestrian. The upper display content is not limited to various types of information related to route display such as turn-by-turn and line-of-sight guidance for detecting pedestrians ahead. The upper display content may be content used for augmented reality (AR) display, or may be content not used for augmented reality display.

The lower display content is, for example, various information related to vehicle speed, engine speed, etc., and is always displayed when the ignition is on. The display position of the lower display content is fixed in terms of the appearance of the driver. The lower display content is not limited to various information related to vehicle speed and engine speed.

The display position of the content will be explained. As the display position of the content, there are a lower display position and an upper display position with respect to one eye point. When receiving the angle switching signal transmitted from the meter device 2, the HUD 3 rotates the concave mirror of the magnifying optical system 11 to switch the angle, thereby switching the content display position between the lower display position and the upper display position. The content displayed in the lower display position is mainly the lower display content described above. The content displayed in the upper display position is mainly the above-described upper display content.

Since the curvature of the windshield 8 is not uniform throughout, but varies locally, there is a problem of distortion of the content displayed as a virtual image. When there are two content display positions, a lower display position and an upper display position, for example, if a distortion correction pattern optimized for the lower display position is prepared, the distortion correction pattern is applied to the lower display position to properly display the virtual image. Although the distortion can be corrected, the virtual image cannot be properly distorted at the upper display position even if the distortion correction pattern is applied. Regarding this point, the control unit 4 has the following functions. It should be noted that the distortion correction pattern includes various parameters and the like used in calculations for solving the problem of content distortion.

The control unit 4 includes a distortion correction pattern storage unit 4a, a display position specifying unit 4b, and a distortion correction pattern application unit 4c. The distortion correction pattern storage unit 4a stores distortion correction patterns corresponding to the lower display position and the upper display position as a distortion correction table. That is, as shown in FIG. 3, the distortion correction pattern storage unit 4a stores the distortion correction pattern "01" that is common to the three eyepoints and optimized for the lower display position, and also stores the distortion correction pattern "01" that is optimized for the upper display position. Then, the distortion correction pattern "02" is stored. Of the three eyepoints, "Short" indicates the eye level position assuming a relatively short person, and "Center" indicates the eye level position assuming a person of medium height. , "Tall" indicates the position at the eye level assuming a relatively tall person.

The display position specifying unit 4b specifies the display position of the content. For example, when a lower display content display request event occurs, the display position specifying unit 4b specifies the lower display position as the display position of the lower display content. For example, when a display request event for the top display content occurs, the display position specifying unit 4b specifies the top position as the display position of the top display content.

When the display position of the content is specified by the display position specifying unit 4b, the distortion correction pattern application unit 4c selects the specified display position from among the plurality of distortion correction patterns stored in the distortion correction pattern storage unit 4a. A corresponding distortion correction pattern is identified, and the identified distortion correction pattern is applied to correct the distortion of the virtual image. When the display position of the content is identified as the lower display position, the distortion correction pattern application unit 4c identifies the distortion correction pattern "01" and applies the identified distortion correction pattern "01" to distort the virtual image. to correct. When the display position of the content is specified as the upper display position, the distortion correction pattern applying unit 4c specifies the distortion correction pattern "02" and applies the specified distortion correction pattern "02" to distort the virtual image. to correct.

That is, as shown in FIG. 4, a distortion correction pattern "01" is prepared as a distortion correction pattern optimized for the lower display position, and a distortion correction pattern "02" is prepared as a distortion correction pattern optimized for the upper display position. By doing so, the distortion of the virtual image can be appropriately corrected regardless of whether the display position of the content is the lower display position or the upper display position, and the distortion of the virtual image can be avoided.

As a comparison target, as shown in FIG. 5, for example, in a configuration that stores only the distortion correction pattern "01" optimized for the lower display position, as shown in FIG. Distortion of the virtual image can be properly corrected, and the distortion of the virtual image can be avoided. However, when the display position of the content is the upper display position, the distortion of the virtual image cannot be corrected appropriately, and the distortion of the virtual image can be avoided. Can not do it. In this embodiment, by preparing distortion correction patterns optimized for each of the lower display position and the upper display position, the distortion of the virtual image can be appropriately corrected regardless of whether the display position of the content is the lower display position or the upper display position. , and the distortion of the virtual image can be avoided.

Next, the operation of the above configuration will be described with reference to FIGS. 7 and 8. FIG. When switching the display position of the content, there are a case where the virtual image is moved and then the light source is turned on, and a case where the light source is turned on and then the virtual image is vertically moved. Each case will be described below. Also, here, a case will be described where, for example, a display request event for the upper display content is generated while the lower display content is being displayed at the lower display position.

(1) When turning on the light source after moving the virtual image (see Fig. 7)
For example, when the lower display content is displayed at the lower display position, the control unit 4 corrects the distortion of the virtual image by applying the distortion correction pattern "01" for the lower display position. When the control unit 4 determines that a display request event for the upper display content, that is, a display request event for the upper display position has occurred (S1: YES), the control unit 4 specifies the upper display position as the display position of the content (display position specifying procedure ), and the light source is turned off (S2). The control unit 4 specifies the distortion correction pattern "02" at the upper display position as the distortion correction pattern to be applied, and applies the distortion correction pattern "02" (S3, corresponding to the distortion correction pattern application procedure). That is, the control unit 4 switches the applied distortion correction pattern from the distortion correction pattern "01" to the distortion correction pattern "02".

The control unit 4 transmits an angle switching signal to the HUD 3, rotates the concave mirror of the magnifying optical system 11 to switch the angle, and moves the virtual image upward (S4). After completing the upward movement of the virtual image, the control unit 4 turns on the light source (S5), and ends the series of processes. When the state where the lower display content is displayed at the lower display position is switched to the state where the upper display content is displayed at the upper display position, the distortion correction pattern to be applied is changed from the distortion correction pattern "01" to the distortion correction pattern "02". By switching to , it is possible to appropriately optimize the display quality of the virtual image displayed in front of the vehicle.

(2) When moving the virtual image vertically after turning on the light source (see FIG. 8)
The control unit 4 performs S11 to S13 similar to S1 to S3 described above. When the distortion correction pattern to be applied is switched from the distortion correction pattern “01” to the distortion correction pattern “02”, the control unit 4 turns on the light source (S14), transmits an angle switching signal to the HUD 3, The angle is switched by rotating the concave mirror to move the virtual image upward (S15). That is, in this case as well, the distortion correction pattern to be applied is changed from the distortion correction pattern "01" in accordance with the switching from the state in which the lower display content is displayed in the lower display position to the state in which the upper display content is displayed in the upper display position. By switching to the distortion correction pattern "02", it is possible to appropriately optimize the display quality of the virtual image displayed in front of the vehicle. When turning on the light source after moving the virtual image, it is necessary to detect the completion of movement of the virtual image. This eliminates the need for additional processing, and simplifies the processing.

For example, the case where the display request event for the upper display content is generated from the state where the lower display content is displayed at the lower display position has been described above. When the display request event of the display content occurs, the distortion correction pattern to be applied is switched from the distortion correction pattern "02" to the distortion correction pattern "01", thereby appropriately adjusting the display quality of the virtual image displayed in front of the vehicle. can be optimized to

As described above, according to the first embodiment, the following effects can be obtained.
A distortion correction pattern "01" corresponding to the lower display position of the content and a distortion correction pattern "02" corresponding to the upper display position of the content are stored, a distortion correction pattern corresponding to the display position is specified, and the specified distortion correction pattern is specified. was applied to correct the distortion of the virtual image. The distortion of the virtual image can be appropriately corrected regardless of whether the display position of the content is the lower display position or the upper display position, and the distortion of the virtual image can be avoided. As a result, the display quality of the virtual image can be appropriately optimized when the display positions of the content displayed by the virtual image in front of the moving body are set to two positions in the vertical direction.

(Second embodiment)
A second embodiment will be described with reference to FIGS. 9 to 11. FIG. The second embodiment is configured to store a plurality of distortion correction patterns corresponding to eyepoints. That is, as shown in FIG. 9, the distortion correction pattern storage unit 4a stores the distortion correction pattern optimized for the lower display position and the distortion correction pattern optimized for the upper display position for each of the three eyepoints. memorize The distortion correction pattern storage unit 4a stores the distortion correction pattern "11" optimized for the lower display position and the distortion correction pattern "14" optimized for the upper display position for the eyepoint "Short". do. The distortion correction pattern storage unit 4a stores the distortion correction pattern "12" optimized for the lower display position and the distortion correction pattern "15" optimized for the upper display position for the eyepoint "Center". do. The distortion correction pattern storage unit 4a stores the distortion correction pattern "13" optimized for the lower display position and the distortion correction pattern "16" optimized for the upper display position for the eyepoint "Tall". do.

In this case, as shown in FIG. 10, distortion correction patterns "11", "12", and "13" are prepared as distortion correction patterns for each eyepoint optimized for the lower display position, and optimized for the upper display position. By preparing distortion correction patterns "14", "15", and "16" as distortion correction patterns for each eye point, the eye point can be further corrected regardless of whether the display position of the content is the lower display position or the upper display position. Any of "Short", "Center", and "Tall" can appropriately correct the distortion of the virtual image, and the distortion of the virtual image can be avoided. FIG. 10 illustrates distortion correction patterns "12" and "15" corresponding to the eye point "Center" and distortion correction patterns "13" and "16" corresponding to the eye point "Tall". The same applies to the distortion correction patterns "11" and "14" corresponding to the eye point "Short".

As a comparison target, as shown in FIG. 11, in a configuration in which only distortion correction patterns "11", "12", and "13" optimized for the lower display position are stored, a virtual image is not displayed when the display position of the content is the lower display position. Distortion of the virtual image can be properly corrected, and the distortion of the virtual image can be avoided. However, when the display position of the content is the upper display position, the distortion of the virtual image cannot be corrected appropriately, and the distortion of the virtual image can be avoided. Can not do it. In this embodiment, by preparing distortion correction patterns optimized for each of the lower display position and the upper display position, the distortion of the virtual image can be appropriately corrected regardless of whether the display position of the content is the lower display position or the upper display position. , and the distortion of the virtual image can be avoided.

As described above, according to the second embodiment, the following effects can be obtained.
Distortion correction patterns "11", "12" and "13" corresponding to the lower display position of the content and distortion correction patterns "14", "15" and "16" corresponding to the upper display position of the content are stored for each eye point. , a distortion correction pattern corresponding to the display position of each eye point is specified, and the specified distortion correction pattern is applied to correct the distortion of the virtual image. It is possible to appropriately correct the distortion of the virtual image regardless of whether the display position of the content is the lower display position or the upper display position, so that the distortion of the virtual image can be avoided. As a result, the display quality of the virtual image can be appropriately optimized when the display positions of the content displayed by the virtual image in front of the moving body are set to two positions in the vertical direction.

(Third embodiment)
A third embodiment will be described with reference to FIGS. 12 to 14. FIG. The third embodiment is configured to linearly correct the distortion correction pattern according to the eyepoint. As shown in FIG. 12, in the meter device 22 of the virtual image display system 21, the control unit 4 includes a distortion correction pattern storage unit 4a, a display position specifying unit 4b, a distortion correction pattern application unit 4c, and a distortion correction pattern A correction unit 4d is provided.

The distortion correction pattern correction unit 4d linearly corrects the distortion correction pattern according to the eyepoint. That is, for example, if the eyepoint is between "Short" and "Center", the distortion correction pattern correction unit 4d uses the distortion correction pattern corresponding to "Short" and the distortion correction pattern corresponding to "Center". linearly correcting the image using the "Short" and "Center" to calculate the distortion correction pattern corresponding to the eye point between "Short" and "Center". For example, if the eye point is between "Center" and "Tall," the distortion correction pattern corrector 4d uses the distortion correction pattern corresponding to "Center" and the distortion correction pattern corresponding to "Tall." Correct and compute the distortion correction pattern corresponding to the eyepoint between "Center" and "Tall".

That is, as shown in FIG. 13, the distortion correction pattern correcting unit 4d selects the distortion correction pattern "11" optimized for the lower display position with respect to the three eyepoints for each of the lower display position and the upper display position. "12" and "13" are linearly corrected, and distortion correction patterns "14", "15" and "16" optimized for the upper display position are linearly corrected. When the distortion correction pattern is linearly corrected by the distortion correction pattern correction unit 4d, the distortion correction pattern application unit 4c applies the linearly corrected distortion correction pattern to correct the distortion of the virtual image.

For comparison, as shown in FIG. 14, in the configuration in which only the distortion correction patterns "11", "12", and "13" optimized for the lower display position according to the eye point are linearly corrected, the content display position is lower. At the display position, the distortion correction pattern can be applied more finely according to the eye point, but at the upper display position of the content, the distortion correction pattern cannot be applied more finely according to the eye point. In the present embodiment, the distortion correction patterns "11", "12", and "13" optimized for the lower display position are linearly corrected according to the eyepoint, and the distortion correction pattern "14" optimized for the upper display position. By linearly correcting "15" and "16" as well, it is possible to apply a finer distortion correction pattern according to the eye point regardless of whether the display position of the content is the lower display position or the upper display position.

As described above, according to the third embodiment, the following effects can be obtained.
The distortion correction patterns "11", "12" and "13" optimized for the lower display position are linearly corrected according to the eyepoint, and the distortion correction patterns "14", "15" and "14" optimized for the upper display position are obtained. 16” is also linearly corrected. As a result, the distortion correction pattern can be applied more finely according to the eye point regardless of whether the display position of the content is the lower display position or the upper display position.

(Other embodiments)
Although the present disclosure has been described with reference to examples, it is understood that it is not limited to such examples or structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and configurations, as well as other combinations and configurations including single elements, more, or less, are within the scope and spirit of this disclosure.

Although a display control device mounted on a vehicle is exemplified as a mobile body, it can also be applied to a ship, an aircraft, or the like as a mobile body. In other words, the present invention may be applied to any mobile object as long as it displays a virtual image including information about the movement of the mobile object in front of it.

Although the two display positions, the upper display position and the lower display position, are illustrated as different display positions in the vertical direction, the present invention can also be applied to three display positions, for example, the upper display position, the middle display position, and the lower display position. In that case, a distortion correction pattern optimized for the lower display position, a distortion correction pattern optimized for the middle display position, and a distortion correction pattern optimized for the upper display position may be prepared. Furthermore, there may be four or more different display positions in the vertical direction.

The controller and techniques described in this disclosure may be implemented by a dedicated computer provided by configuring a processor and memory programmed to perform one or more functions embodied by the computer program. can be Alternatively, the controller and techniques described in this disclosure may be implemented by a dedicated computer provided by configuring the processor with one or more dedicated hardware logic circuits. Alternatively, the controller and techniques described in this disclosure can be implemented by a combination of a processor and memory programmed to perform one or more functions and a processor configured with one or more hardware logic circuits. It may also be implemented by one or more dedicated computers configured. The computer program may also be stored as computer-executable instructions on a computer-readable non-transitional tangible storage medium.

In the drawings, 1 and 21 are virtual image display systems, 2 and 22 are meter devices (display control devices), 3 is a HUD, 4 is a control unit, 4a is a distortion correction pattern storage unit, 4b is a display position specifying unit, and 4c is distortion. A correction pattern application unit 4d is a distortion correction pattern correction unit.

Claims (7)

A display control device (2) for controlling a display mode of a virtual image displayed in front of a moving body,
a distortion correction pattern storage unit (4a) that stores a plurality of distortion correction patterns corresponding to each of a plurality of display positions of content that differ in the vertical direction;
a display position specifying unit (4b) for specifying the display position of the content;
A distortion correction pattern application unit that applies a distortion correction pattern corresponding to the display position identified by the display position identification unit from among the plurality of distortion correction patterns stored in the distortion correction pattern storage unit to correct distortion of the virtual image. (4c), and a display control device. 2. The distortion correction pattern application unit according to claim 1, wherein the distortion correction pattern application unit turns off the light source, applies the distortion correction pattern specified by the distortion correction pattern specification unit, moves the virtual image in the vertical direction, and then turns on the light source. Display controller. 2. The display according to claim 1, wherein the distortion correction pattern applying unit turns off the light source, applies the distortion correction pattern specified by the distortion correction pattern specifying unit, turns on the light source, and then vertically moves the virtual image. Control device. The distortion correction pattern storage unit stores a plurality of distortion correction patterns corresponding to each of a plurality of display positions of content that differ in the vertical direction and corresponding to a plurality of heights of the driver's eyes that differ in the vertical direction. 4. The display control device according to any one of Items 1 to 3. A distortion correction pattern correction unit (4d) linearly corrects the distortion correction pattern according to a plurality of heights of the driver's eyes that are different in the vertical direction,
5. The display control device according to any one of claims 1 to 4, wherein the distortion correction pattern application section applies the distortion correction pattern linearly corrected by the distortion correction pattern correction section to correct the distortion of the virtual image. A distortion correction pattern storage unit (4a) for storing a plurality of distortion correction patterns corresponding to each of a plurality of display positions of contents that differ in the vertical direction is provided, and the display mode of the virtual image displayed in front of the moving body is controlled. a display position specifying procedure for specifying a content display position in a control unit (4) of a display control device (2);
A distortion correction pattern application procedure for correcting distortion of a virtual image by applying a distortion correction pattern corresponding to the display position identified by the display position identification procedure from among the plurality of distortion correction patterns stored in the distortion correction pattern storage unit. and a display control program that executes A virtual image display system (1) mounted on a mobile object,
a distortion correction pattern storage unit (4a) that stores a plurality of distortion correction patterns corresponding to each of a plurality of display positions of content that differ in the vertical direction;
a display position specifying unit (4b) for specifying the display position of the content;
A distortion correction pattern application unit that applies a distortion correction pattern corresponding to the display position identified by the display position identification unit from among the plurality of distortion correction patterns stored in the distortion correction pattern storage unit to correct distortion of the virtual image. (4c);
A virtual image display system comprising a head-up display (3) for displaying a virtual image in front of the moving object.

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