WO2020085159A1

WO2020085159A1 - Display device

Info

Publication number: WO2020085159A1
Application number: PCT/JP2019/040603
Authority: WO
Inventors: 雅彦東條; 匠佐藤
Original assignee: 日本精機株式会社
Priority date: 2018-10-23
Filing date: 2019-10-16
Publication date: 2020-04-30

Abstract

Provided is a display device with which an image to be viewed as a virtual image can be appropriately displayed. The display device is installed in a vehicle and emits display light that shows an image in the direction toward a windshield so as to display, as a virtual image V, the image on a virtual surface A which is set in front of the windshield. The display device comprises a display control means that controls the display of the image. The virtual surface A is set so as to be tilted toward the front relative to the up-down direction from the perspective of a viewer who views the image. The image includes a prescribed content image C, and a background image B which serves as the background of the content image C. The background image B is displayed with a higher luminance at the top section compared to the bottom section when viewed from the viewer's perspective. Further, the background image B may be displayed in an embodiment satisfying at least one of the following: the top section is a warmer color than the bottom section, has a higher saturation than the bottom section, or has a higher brightness than the bottom section.

Description

Display device

The present invention relates to a display device.

As a conventional display device, in Patent Document 1, a virtual surface (virtual image display surface) set in front of the transparent member is emitted by emitting display light representing an image toward a transparent member such as a windshield of a vehicle. ) Discloses that the image is displayed as a virtual image. The virtual image display surface can be set to be tilted forward with respect to a vertical direction for a viewer (mainly a vehicle driver) who visually recognizes the display image.

JP, 2016-212338, A

When the virtual image display surface is set obliquely as described above, the upper part of the image displayed on the virtual image display surface may be thinner than the lower part and may be blurred due to the characteristics of the optical system. As a result, the image may be visually recognized with the illusion that the upper part of the image is deeper than the lower part, and may not be displayed properly.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device that can appropriately display an image visually recognized as a virtual image.

In order to achieve the above object, the display device according to the present invention,
A display device mounted on a vehicle, which emits display light representing an image toward a transparent member to display the image as a virtual image on a virtual surface set in front of the transparent member,
A display control means for controlling the display of the image,
The virtual surface is set to be inclined forward with respect to a vertical direction for a viewer who visually recognizes the image,
The image includes a predetermined content image and a background image serving as a background of the content image,
The background image is displayed with higher brightness in the upper part as viewed from the viewer than in the lower part.

According to the present invention, an image visually recognized as a virtual image can be appropriately displayed.

It is a block diagram of the display system for vehicles concerning one embodiment of the present invention. It is a figure for demonstrating the mounting aspect in a vehicle of a display apparatus. It is a figure for demonstrating the display mode of the head-up display with which a display device is equipped. (A) is a figure for demonstrating the display mode of a content image and a background image, (b) is a figure for demonstrating the characteristic of a background image. (A) is a figure mainly for demonstrating an item image and a corresponding item image, (b) is a figure for demonstrating the characteristic of a cursor image.

An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a vehicle display system K according to the present embodiment is mounted on a vehicle 1 and includes a display device 100, a vehicle information processing unit 200, and an operation unit 300.

As shown in FIG. 1, the display device 100 includes a head-up display (HUD) 10, a meter 20, and a control device 30. The display device 100 not only displays information about the vehicle 1 (hereinafter referred to as “vehicle information”) but also displays information other than vehicle information in an integrated manner. The vehicle information includes not only information on the vehicle 1 itself but also information on the outside of the vehicle 1 related to the operation of the vehicle 1.

As shown in FIG. 3, the HUD 10 is provided inside the dashboard 2 and emits the display light L toward the windshield 3. The display light L reflected by the windshield 3 travels toward the user 4 (mainly the driver of the vehicle 1). The user 4 can view the image represented by the display light L in front of the windshield 3 as a virtual image V by placing the viewpoint in the eye box E. That is, the HUD 10 displays the virtual image V in front of the windshield 3. Thereby, the user 4 can visually recognize the virtual image V by superimposing it on the landscape.

As shown in FIG. 3, the HUD 10 is set in front of the windshield 3 and on the virtual plane A that is set forward with respect to the vertical direction (the same as the vertical direction of the vehicle 1) for the user 4. The virtual image V is displayed. The virtual surface A corresponds to the display surface of the LCD 11 described later and is a displayable area of the virtual image V. The virtual surface A has a rectangular shape when viewed from the normal direction. For example, in the virtual plane A, one end closest to the vehicle 1 is set at a position of about 5 m (for example, 6 m) from the vehicle 1, and the other end farthest from the vehicle 1 is at a position of about 10 m (for example, 12 m) of the vehicle 1. Is set to. The virtual surface A and the eye box E are preset based on the size of the display surface of the LCD 11, various mirrors included in the HUD 10, and an optical system including the windshield 3.

As shown in FIG. 1, the HUD 10 is configured to include an LCD (Liquid Crystal Display) 11, a light source 12 (backlight) that illuminates the LCD 11 from behind, and a reflection unit (not shown). For example, the LCD 11 is of a TFT (Thin Film Transistor) type, and the light source 12 is composed of an LED (Light Emitting Diode).

Under the control of the control device 30, the HUD 10 generates the display light L by the LCD 11 illuminated by the light source 12 displaying an image. The generated display light L is emitted toward the windshield 3 after being reflected by the reflecting portion. The reflector is composed of, for example, two mirrors, a folding mirror and a concave mirror. The folding mirror folds the display light L emitted from the LCD 11 and directs it toward the concave mirror. The concave mirror expands the display light L from the folding mirror and reflects it toward the windshield 3. As a result, the virtual image V visually recognized by the user 4 is an enlarged image of the image displayed on the display surface of the LCD 11. Note that the number of mirrors forming the reflecting portion can be arbitrarily changed according to the design.

In the HUD 10, by arranging the display surface of the LCD 11 with an inclination, the virtual surface A can be set obliquely as described above. The display device that emits the display light L is not limited to the LCD 11. The display device may use an OLED (Organic Light Emitting Diodes), DMD (Digital Micromirror Device), LCOS (Liquid Crystal On Silicon), or the like. Even in this case, by tilting the display surface (screen when using DMD or LCOS) of the display device, the virtual surface A can be set obliquely as described above. The tilt angle of the virtual surface A may be adjustable by adjusting the tilt angle of the display surface of the display device or the screen with an actuator.

As shown in FIG. 2, the meter 20 is located in front of the steering wheel 5 as viewed from the user 4 and reports predetermined vehicle information. The vehicle information includes measured quantities relating to the vehicle 1, such as vehicle speed and engine speed. As shown in FIG. 1, the meter 20 includes an LCD 21 and a light source 22 (backlight) that illuminates the LCD 21 from behind. For example, the LCD 21 is a TFT type, and the light source 22 is composed of LEDs. Under the control of the control device 30, the meter 20 displays a later-described notification image R as an image showing vehicle information.

Here, as shown in FIG. 3, an arbitrary portion between the virtual surface A on which the virtual image V is formed and the eye box E is referred to as a virtual image display unit 10a. This is because the virtual image V is displayed when the user 4 makes a line of sight on the virtual image display unit 10a. An image displayable area of the LCD 21 of the meter 20 is referred to as an image display unit 20a. In such a case, as shown in FIG. 2, the virtual image display unit 10a realized by the HUD 10 is located above the image display unit 20a realized by the meter 20. Hereinafter, displaying the virtual image V by the HUD 10 may be referred to as “displaying an image (virtual image V) on the virtual image display unit 10 a”, and displaying the image by the meter 20 is “displaying on the image display unit 20 a”. Display an image ". Further, the virtual image display unit 10a and the image display unit 20a may be collectively referred to simply as "display unit".

The control device 30 includes a microcomputer that controls the overall operation of the display device 100, and includes a control unit 31, a ROM (Read Only Memory) 32, and a RAM (Random Access Memory) 33, as shown in FIG. . Further, the control device 30 includes a drive circuit and an input / output circuit for communicating with various systems in the vehicle 1 as a configuration not shown.

The control unit 31 controls the image display operation by the HUD 10 and the meter 20, and includes a CPU (Central Processing Unit) and a GDC (Graphics Display Controller) that executes image processing in cooperation with the CPU. The GDC includes, for example, a GPU (Graphics Processing Unit), an FPGA (Field-Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), and the like. Note that the configurations of the control device 30 and the control unit 31 are arbitrary as long as the functions described below are satisfied.

The ROM 32 is composed of, for example, an EEPROM (Electrically Erasable Programmable Read-Only Memory) and a flash memory. The ROM 32 stores an operation program for image display control and fixed data such as image part data in advance.

RAM 33 is composed of, for example, SRAM (Static RAM), DRAM (Dynamic RAM), and the like. The ROM 32 and the RAM 33 may be built in the control unit 31.

The CPU of the control unit 31 controls the display of each display unit (the virtual image display unit 10a and the image display unit 20a) based on various image data stored in the ROM 32 in cooperation with the GDC. The GDC determines the control content of the display operation of each display unit based on the display control command from the CPU. The GDC reads the image part data required to form one screen displayed on each display unit from the ROM 32 and transfers it to the RAM 33. Further, the GDC uses the RAM 33 to create picture data for one screen based on the image part data and various image data received by communication from outside the display device 100. Then, when the GDC completes the picture data for one screen in the RAM 33, the GDC transfers the picture data to each display unit in synchronization with the image update timing. As a result, the image is displayed on each display unit.

(Regarding Image Displayed on Virtual Image Display Unit 10a) Specifically, the virtual image V that can be displayed on the virtual image display unit 10a by the control unit 31 includes the content image C and the background image B (see FIG. 4A, etc.), And a cursor image S (see FIG. 5). Layers are assigned in advance to each image forming the virtual image V, and the control unit 31 can individually control the display of the images arranged in each layer when the images are superimposed and drawn. Has become. Of these images, the lowest layer is assigned to the background image B, and the background image B functions as a mount as a background located behind the cursor image S and the content image C. Whether the layer assigned to the content image C or the cursor image S is the upper layer is arbitrary as long as the visibility of the content image C is not hindered. For example, the cursor image S may be assigned to the uppermost layer, and the cursor image S may be superimposed and displayed on the front side of the content image C in drawing control.

The content image C is, for example, for notifying various vehicle information, and includes a measured amount (vehicle speed, engine speed, etc.) of the vehicle 1, warning information (fuel drop, engine oil pressure abnormality, tire air pressure abnormality, etc.), and the like. It is an image for notifying route guidance information, road guidance information (for example, an image imitating a road sign, etc.), or a front caution object located in front of the vehicle 1. It should be noted that the content image C is not limited to showing vehicle information, and may be an entertainment image (moving image) such as a television or a movie.

Further, the control unit 31 can display, as the content image C, an item image H selected by a predetermined operation when the user 4 views details of various vehicle information. There are a plurality of item images H, and as shown in FIG. 5A, they are arranged in the vertical direction as viewed from the user 4. These item images H are displayed downward as seen from the user 4 as the predetermined priority is higher. In FIG. 5A, among the display positions of the item images H, reference numerals P1, P2, and P3 are attached in order from the highest priority. The priority is determined according to the positional relationship with the cursor image S described below.

The cursor image S is a selected image which indicates that a target image of any of the plurality of item images H has been selected and which is visually recognized to overlap the target image. Specifically, as shown in FIG. 5A, the cursor image S is visually recognized as overlapping with the item image H displayed at the position P1. When a selection operation is performed from the operation unit 300 described below, the plurality of item images H move vertically with respect to the immovable cursor image S according to the selection operation. For example, as shown in FIG. 5A, when the item image H at the position P2 moves to the position P1 in accordance with the selection operation, the item image H at the position P1 moves to the position P3 and the position P3. The matching item image H may be moved to the position P2. That is, the closer the item image H is to the immovable cursor image S, the higher the priority. The other features of the cursor image S and the features of the background image B will be described later.

The virtual image V shown in FIG. 4A shows an example of how the user 4 seated in the driver's seat of the vehicle 1 can see (the same applies to FIG. 5A). Since the virtual plane A is set obliquely as described above, in order for the user 4 to visually recognize the virtual image V as shown in FIG. In consideration of the projection onto A, the control unit 31 controls the display of the virtual image V. For example, in order to allow the user 4 to visually recognize the rectangular virtual image V that faces the user 4, a trapezoidal virtual image V obtained by projecting the rectangle onto the virtual plane A from the viewpoint of the user 4 is displayed. . Each image forming the virtual image V described below is display-controlled in consideration of the fact that the virtual plane A is oblique in this way. As the viewpoint position of the user 4, the control unit 31 may use an assumed viewpoint position stored in the ROM 32 in advance, or may be detected by a viewpoint detecting means (not shown) such as a camera capturing the user 4. You may specify suitably based on a signal.

Note that the control unit 31, as shown in FIG. 4A, according to the type of image that can be displayed as the virtual image V, is a virtual image V that is visually recognized to face the user 4 (hereinafter, the virtual image V in the facing mode). Display control of a virtual image V (hereinafter, referred to as a virtual image V in a road surface superimposition mode) that is visually recognized as being superimposed on the road surface, which is not shown. . For example, the measurement amount, the warning information, the road guidance information, and the content image C for notifying the attention object can be the virtual image V in the facing manner. Further, for example, as the content image C for notifying the route guidance information, an arrow-shaped image that is visually recognized by being superimposed on the front road surface and that guides the route can be the virtual image V in the road surface superimposition mode. .

(Regarding the image displayed on the image display unit 20a)
The notification image R, which can be displayed on the image display unit 20a by the control unit 31 and is used to notify the vehicle 1, includes a first instrument image M1, a second instrument image M2, a corresponding item image Hc, and a corresponding cursor image Sc. It is configured to include.

The first instrument image M1 is an image representing, for example, a speedometer. The second instrument image M2 is an image representing a tachometer, for example.

There are a plurality of corresponding item images Hc, which are arranged in the vertical direction when viewed from the user 4, and correspond to the above-mentioned plurality of item images H. These corresponding item images Hc are displayed higher when viewed from the user 4 as the predetermined priority is higher. In FIG. 5A, reference numerals Pc1, Pc2, and Pc3 are assigned to the display positions of the corresponding item image Hc in descending order of priority. The priority is determined according to the positional relationship with the corresponding cursor image Sc described below.

The corresponding cursor image Sc is a corresponding selection image indicating that any one of the plurality of corresponding item images Hc is selected. Note that the corresponding cursor image Sc is not limited to the one that is visually recognized overlapping with the selected corresponding item image Hc. Specifically, as shown in FIG. 5A, the corresponding cursor image Sc is displayed in such a manner that the corresponding item image Hc displayed at the position Pc1 can be recognized as being in the selected state. When a selection operation is performed from the operation unit 300, which will be described later, a plurality of corresponding item images Hc move vertically with respect to the corresponding corresponding cursor image Sc that does not move. For example, as shown in FIG. 5A, when the item image H at the position Pc2 moves to the position Pc1 according to the selection operation, the corresponding item image Hc at the position Pc1 moves to the position Pc3, and the position Pc3 moves to the position Pc3. The corresponding item image Hc in Pc3 may be moved to the position Pc2. That is, the priority of the corresponding item image Hc is higher as it is closer to the immovable corresponding cursor image Sc.

When one selection operation is performed, the item image H and the corresponding item image Hc are scrolled in conjunction with each other. For example, when the item image H displayed at the position P2 or the position P3 in the virtual image V moves downward toward the cursor image S, the corresponding item image Hc displayed at the position Pc2 or the position Pc3 in the notification image R corresponds. It moves upward toward the cursor image Sc.
That is, the arrangement of the item images H in the virtual image V and the arrangement of the corresponding item images Hc in the notification image R are reversed in the vertical direction, and the movement direction and the notification of the item images H in the virtual image V according to one selection operation are notified. The moving directions of the corresponding item image Hc in the image R are opposite to each other. As described above, in the notification image R as the actual image, the corresponding item image Hc having a high priority is conventionally positioned upward, while in the virtual image V, the item image H having a high priority is positioned downward.
In this way, as described above, the characteristic that the upper portion of the virtual image V is more difficult to visually recognize than the lower portion (in other words, the characteristic that the lower portion of the virtual image V is easier to visually recognize than the upper portion) is utilized, and the priority is set. The item image H having a high value can be displayed easily.

In this embodiment, the item (list) indicated by each of the item image H displayed at the position P1 and the corresponding item image Hc displayed at the position Pc1 has the same content. The same applies to the correspondence relationship between the position P2 and the position Pc2 and the correspondence relationship between the position P3 and the position Pc3. For example, if the item image H displayed at the position P1 shows the list "repair history", the corresponding item image Hc displayed at the position Pc1 also shows the list "repair history". Further, if the item image H displayed at the position P2 shows the list "navi setting", the corresponding item image Hc displayed at the position Pc2 also shows the list "navi setting". Further, if the item image H displayed at the position P3 shows the list of "driving mode switching", the corresponding item image Hc displayed at the position Pc3 also shows the list of "driving mode switching".

The cursor image S and the corresponding cursor image Sc have a correspondence relationship between the lower position P1 in the virtual image V and the lower position Pc1 in the notification image R, but the display modes may be different from each other. For example, the corresponding cursor image Sc may be a frame-shaped image surrounding the corresponding item image Pc1 displayed at the position Pc1, or at least a part of the corresponding item image Pc1 may have a color, saturation, gradation, luminance, It may be realized by changing the shape or the like.

Returning to FIG. 1, the control unit 31 communicates with other components in the vehicle 1 (vehicle information processing unit 200, operation unit 300, etc.). As the communication, for example, a communication method such as CAN (Controller Area Network), Ethernet, MOST, LVDS (Low Voltage Differential Signaling) can be applied.

The vehicle information processing unit 200 analyzes an information of the vehicle 1 itself and controls an operation of each unit of the vehicle 1, an ECU (Electronic Control Unit), a peripheral information acquisition unit that acquires information of the periphery (outside) of the vehicle 1, and The vehicle 1 includes a front object detection unit that detects a front object of the vehicle 1, a car navigation (car navigation) device, and the like.
The peripheral information acquisition unit communicates between the vehicle 1 and a wireless network (V2N: Vehicle To Cellular Network), communicates between the vehicle 1 and another vehicle (V2V: Vehicle To Vehicle), and communicates between the vehicle 1 and a pedestrian (V2P: Vehicle To Pedestrian), and various modules that enable communication (V2I: Vehicle To roadside Infrastructure) between the vehicle 1 and the roadside infrastructure. That is, the peripheral information acquisition unit enables communication by the V2X (Vehicle To Everything) between the vehicle 1 and the outside of the vehicle 1.
The front object detection unit is, for example, a stereo camera that captures a landscape in front of the vehicle 1, or a distance measurement sensor such as LIDAR (Laser Imaging Detection And Ranging) that measures a distance from the vehicle 1 to an object located in front of the vehicle 1. Alternatively, it is composed of a sonar that detects an object located in front of the vehicle 1, an ultrasonic sensor, a millimeter wave radar, and the like.
The car navigation device includes a GPS controller that calculates the position of the vehicle 1 based on a GPS (Global Positioning System) signal received from an artificial satellite or the like, and a storage unit that stores map data. The car navigation device reads the map data near the current position from the storage unit based on the position information from the GPS controller, and determines the guide route to the destination set by the user 4. The car navigation device outputs information about the current position of the vehicle 1 and the determined guide route to the control unit 31.

For example, the control unit 31 can display the content image C for notifying the measurement amount and the warning information described above based on the information from the ECU. Further, the control unit 31 can display the content image C for notifying the route guidance information and the road guidance information described above based on the information from the peripheral information acquisition unit and the car navigation device. In addition, the control unit 31 can display the content image C for notifying the front attention object based on the information from the front object detection unit. The control unit 31 can also display the first instrument image M1 and the second instrument image M2 based on the information from the ECU.

The operation unit 300 supplies a signal indicating the operation content to the control unit 31 in response to the operation of the user 4. The operation unit 300 includes, for example, a steering switch provided on the steering wheel 5 and a touch panel. In particular, the operation unit 300 selects the list currently displayed, that is, aligns the item image H with the cursor image S and the corresponding item image Hc with the corresponding cursor image Sc as described above. It is possible to accept a selection operation. The selection operation may be, for example, an operation of moving the tiltable steering switch in the vertical direction or an operation of tracing the touch panel in the vertical direction. It should be noted that the operation unit 300 may be composed of a known operation means provided in a place other than the steering wheel 5.

The above is the description of the configuration of the vehicle display system K. Next, the features of the background image B and the cursor image S will be described.

The background image B is, for example, a still image, and as shown in FIG. 4B, the upper part viewed from the user 4 is displayed with higher brightness than the lower part. Specifically, the background image B is displayed so that the brightness gradually increases from the lower side to the upper side.
As a result, in the content image C displayed by being superimposed on the background image B, it is possible to prevent the upper portion of the content image C from being visually recognized as if it were deeper than the lower portion. Therefore, the virtual image V in the front facing mode can be appropriately displayed while facing the virtual image V, and the virtual image V in the road superimposing mode can be appropriately displayed by being superposed on the road surface.

Moreover, not only the brightness but also the warmer color, the higher saturation, and the higher lightness can make the user 4 illusion that the visual target is in front. Therefore, the background image B may be displayed in such a manner that the upper part as viewed from the user 4 is warmer than the lower part, has a higher saturation, and has a higher lightness than the lower part. .

For example, when a warm color is used, the background image B may be displayed in a gradation mode so that the background color gradually becomes warmer from the lower side toward the upper side. As an example, gradation may be applied so that the lower part of the background image B is a cold color such as blue, the middle part is a neutral color such as purple or green, and the upper part is a warm color such as red or orange.

For example, when the saturation is used, the background image B may be displayed in a gradation mode so that the saturation becomes gradually higher from the lower side to the upper side. As an example, the gradation may be applied so that the lower part of the background image B is achromatic and the upper part thereof is a highly saturated color such as blue or green.

For example, when the brightness is used, the background image B may be displayed in a gradation manner so that the brightness gradually increases from the bottom to the top. As an example, the gradation may be applied such that the lower part of the background image B is darker than the upper part and the upper part is brighter than the lower part (white or the like).

It should be noted that the background image B is optional as long as the upper part as viewed from the user 4 is warmer than the lower part, has a higher saturation, and / or has a higher lightness than the lower part. As long as the content image C can be viewed properly, it is not necessary to use strict gradation. In addition, the control unit 31 can change and control the luminance, warm color, saturation, and lightness of the background image B (variation of various attributes in the vertical direction of the background image B) according to the external light intensity. Good.

Similar to the background image B, the cursor image S can also be displayed with higher brightness in the upper part as viewed from the user 4 than in the lower part, as shown in FIG. 5B. Specifically, the cursor image S is displayed so that the brightness gradually increases from the lower side to the upper side. Further, similarly to the background image B, the cursor image S satisfies at least one of a warmer color, a higher saturation, and a higher lightness than the lower part viewed from the user 4. It may be displayed in a form.
Thus, the item image H selected in the cursor image S can be displayed in an easy-to-see manner for the same reason as described above.

The present invention is not limited to the above embodiments and drawings. Modifications (including deletion of constituent elements) can be appropriately added without changing the gist of the present invention.

(1) The display device 100 described above is mounted on the vehicle 1 and is set in front of the transparent member by emitting the display light L representing an image toward the transparent member (the windshield 3). The image is displayed as a virtual image V on the virtual surface A. The display device 100 includes a display control unit (for example, the control device 30) that controls the display of the image, and the virtual surface A is forward in the vertical direction for the viewer (user 4) who visually recognizes the image. The image is set to be inclined, and the image includes a predetermined content image C and a background image B that is the background of the content image C. The background image B has a higher upper part as viewed from the viewer than a lower part. Displayed in brightness.
Therefore, as described above, in the content image C displayed by being superimposed on the background image B, it is possible to prevent the upper portion of the content image C from being perceived as if it were deeper than the lower portion. it can. That is, the image visually recognized as the virtual image V can be appropriately displayed. Further, if the fixed background image B is used regardless of the type of the content image C, an image visually recognized as the virtual image V can be appropriately displayed without controlling the vertical brightness of the content image C. It is possible to suppress an increase in control load on the control device 30.

(2) Further, the background image B is displayed in such a manner that the upper portion viewed from the viewer is warmer than the lower portion, has a higher saturation, and / or has a higher lightness than the lower portion. May be.
By doing so, as described above, the image visually recognized as the virtual image V can be displayed more appropriately.

(3) The content image C includes a plurality of item images H arranged in the vertical direction as viewed by the viewer, and the item image H is displayed downward as viewed from the viewer as the priority level is higher in advance. It may be done.
By doing so, the characteristic that the lower part of the virtual image V is easier to see than the upper part can be displayed, and the item image H having a high priority can be displayed easily.

(4) The display device 100 further includes an image display unit 20a which is located below the virtual image display unit 10a on which the virtual image V is displayed when viewed from the viewer, and which displays the notification image R for performing the notification regarding the vehicle 1. Prepare The display control means also controls the display of the notification image R, and the notification image R is arranged in the up-down direction as viewed by the viewer and includes a plurality of corresponding item images Hc corresponding to a plurality of item images H. The image Hc is displayed higher as viewed from the viewer as the predetermined priority is higher.
In this way, it is possible to easily display the item image H having a high priority while maintaining the correspondence relationship between the display contents of the item image H in the virtual image V and the corresponding item image Hc in the notification image R.

(5) The display control means can indicate that the target image of any of the plurality of item images H is selected, and can display the cursor image S that is visually recognized to overlap the target image. The image S is displayed with higher brightness in the upper part as viewed from the viewer than in the lower part.
This makes it possible to display the selected item image H on the cursor image S in an easy-to-see manner. Note that when the brightness of the cursor image S is not used to make the item image H easy to see, the cursor image S does not have to be visually recognized overlapping the item image H. You may employ | adopt the control which cursor image S moves to an up-down direction.

In the above description, in order to facilitate understanding of the present invention, description of publicly known technical matters has been appropriately omitted.

K ... Vehicle display system 100 ... Display device 10 ... HUD
10a ... Virtual image display part V ... Virtual image C ... Content image, H ... Item image, S ... Cursor image B ... Background image 20 ... Meter 20a ... Image display part R ... Notification image, Hc ... Corresponding item image, Sc ... Corresponding cursor image 30 ... Control device 31 ... Control part, 32 ... ROM, 33 ... RAM
200 ... Vehicle information processing section 300 ... Operation section 1 ... Vehicle 2 ... Dashboard 3 ... Windshield 4 ... User 5 ... Steering wheel E ... Eye box, L ... Display light, A ... Virtual plane

Claims

A display device mounted on a vehicle, which emits display light representing an image toward a transparent member to display the image as a virtual image on a virtual surface set in front of the transparent member,
A display control means for controlling the display of the image,
The virtual surface is set to be inclined forward with respect to a vertical direction for a viewer who visually recognizes the image,
The image includes a predetermined content image and a background image serving as a background of the content image,
The background image is displayed with higher brightness in the upper part as viewed from the viewer than in the lower part.
Display device.
The background image is displayed in such a manner that the upper part as viewed from the viewer is warmer than the lower part, has a higher saturation, or has a higher lightness,
The display device according to claim 1.
The content image includes a plurality of item images arranged in the vertical direction viewed from the viewer,
The item image is displayed downward as viewed from the viewer as the predetermined priority is higher,
The display device according to claim 1.
Further comprising an image display unit that is located below the virtual image display unit on which the virtual image is displayed when viewed from the viewer, and that displays a notification image for performing a notification regarding the vehicle,
The display control means also controls the display of the notification image,
The notification image is arranged in the vertical direction viewed from the viewer, and includes a plurality of corresponding item images corresponding to the plurality of item images,
The corresponding item image is displayed higher as viewed from the viewer as the predetermined priority is higher.
The display device according to claim 3.
The display control means indicates that a target image of any of the plurality of item images is selected, and is capable of displaying a cursor image that is visually recognized overlapping with the target image,
The cursor image is displayed with higher brightness in the upper part as viewed from the viewer than in the lower part.
The display device according to claim 3.