WO2022244511A1

WO2022244511A1 - Display device

Info

Publication number: WO2022244511A1
Application number: PCT/JP2022/015996
Authority: WO
Inventors: 貴博白井; 泰弘小野; 裕稲垣
Original assignee: 株式会社東海理化電機製作所
Priority date: 2021-05-17
Filing date: 2022-03-30
Publication date: 2022-11-24
Also published as: CN117295629A; JP2022176747A

Abstract

A display device (1) comprises a display unit (2) that displays a display image (21) on a display screen (20), an optical path alteration unit (3) that alters the optical path (26) of light (25) outputted from the display screen (20) to form an in-air image (36) that is based on the display image (21) in an in-air display area (35), and a drive unit (4) that drives the display unit (2) to a first position (11) and a second position (12). From the first position (11), the display image (21) is presented directly to a user. From the second position (12), the display image (21) is directed toward the optical path alteration unit (3), and the in-air image (36) is presented to the user.

Description

Display device

Cross-reference to related applications

This application claims the priority of Japanese Patent Application No. 2021-083328 filed on May 17, 2021, and the entire contents of Japanese Patent Application No. 2021-083328 are incorporated by reference into this application. do.

The present invention relates to display devices.

2. Description of the Related Art A display device that is arranged on an instrument panel of a vehicle and has a retractable display is known (see Patent Document 1, for example).

When this display device is not used, the display is stored in a housing and covered with a cover, and when used, the cover is slid upward to unfold the display from the housing.

JP 2007-126135 A

In the display device disclosed in Patent Document 1, the forward visibility may be obstructed by the display, and the occupants may feel a sense of blockage. There is a problem that it is not possible to see and the convenience is lowered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display device capable of improving convenience.

A display device according to an embodiment of the present invention includes a display unit that displays a display image on a display screen, and an image is formed on a display area in the air by changing the optical path of light output from the display screen, and an image is formed in the air based on the display image. An optical path changing unit for generating an image and a display unit are driven to a first position and a second position, the display image being directly presented to the user at the first position, and the display image being optically changed at the second position. and a drive for presenting an aerial image to the user.

According to one embodiment of the present invention, it is possible to provide a display device that improves convenience.

FIG. 1A is an explanatory diagram showing a display screen of a display unit of the display device according to the first embodiment. FIG. 1B is an explanatory diagram showing aerial imaging according to the first embodiment. FIG. 1C is a block diagram showing the display device according to the first embodiment. FIG. 2A is an explanatory diagram schematically showing a state in which the display device according to the first embodiment is at a first position; FIG. 2B is an explanatory diagram schematically showing a state in which the display device according to the first embodiment is at the second position; FIG. 3A is an explanatory diagram schematically showing a state in which the display device according to the modification is at the first position. FIG. 3B is an explanatory diagram schematically showing a state in which the display device according to the modification is at the second position. FIG. 4 is a flow chart showing the operation of the display device according to the first embodiment. FIG. 5A is an explanatory diagram schematically showing a state in which the display device according to the second embodiment is at the first position. FIG. 5B is an explanatory diagram schematically showing a state in which the display device according to the second embodiment is at the second position. FIG. 6A is an explanatory diagram schematically showing a state in which the display device according to the third embodiment is at the first position. FIG. 6B is an explanatory diagram schematically showing a state in which the display device according to the third embodiment is at the second position.

(Summary of embodiment)
A display device according to an embodiment includes a display unit that displays a display image on a display screen, and an image is formed on a display area in the air by changing an optical path of light output from the display screen, and an aerial image is formed based on the display image. and driving the display unit to a first position and a second position, where the display image is directly presented to the user at the first position, and the display image is sent to the optical path changer at the second position. and a drive for presenting an aerial image to a user.

The display device presents the display image to the user at the first position, and presents the aerial image formation to the user at the second position. The display image is less likely to be affected by ambient light and is easier to see than the presentation of . can. Therefore, the display device can improve convenience.

[First embodiment]
(Outline of display device 1)
FIG. 1A is an explanatory diagram showing a display screen of a display unit, FIG. 1B is an explanatory diagram showing aerial imaging, and FIG. 1C is a block diagram of a display device. FIG. 2A is an explanatory diagram schematically showing a state in which the display device is at the first position, and FIG. 2B is an explanatory diagram schematically showing a state in which the display device is at the second position. 2A and 2B, the user side is on the left side of the paper. Note that in each drawing according to the embodiments described below, the ratio between figures may differ from the actual ratio. Further, in FIG. 1C, arrows indicate the flow of main signals and information. The vertical and horizontal directions are based on the vertical and horizontal directions of the vehicle 8 unless otherwise specified.

As an example, as shown in FIGS. 1A and 1B, the display device 1 is mounted on a vehicle 8 and arranged near the center of a dashboard 80 between the driver's seat and the passenger's seat. Note that the display device 1 is not limited to the vicinity of the center of the dashboard 80 , and may be arranged at another position on the dashboard 80 , may be arranged outside the dashboard 80 , or may be arranged outside the vehicle 8 . can be

The display device 1 of this embodiment is configured to display an image requested by the controlled device 85, as shown in FIGS. 1A, 1B and 1C. The controlled device 85 is a navigation device, an air conditioner, a music and video reproducing device, a vehicle control device, or the like mounted on the vehicle 8, or a portable terminal connected by wire or wirelessly.

The vehicle control device, for example, comprehensively controls the vehicle 8, and causes the display device 1 to display an image related to warning, an image related to automatic driving, an image related to settings of the vehicle 8, and the like. Mobile terminals are, for example, mobile personal computers, smart phones, tablet terminals, phablet terminals, smart watches, and the like. Note that these images are images of figures, symbols, characters, etc., and images in which these are combined.

As shown in FIGS. 2A and 2B, the display device 1 includes a display unit 2 that displays a display image 21 on a display screen 20, and an aerial display area by changing an optical path 26 of light 25 output from the display screen 20. 35 to form an aerial image 36 based on the display image 21; a driving unit 4 for directly presenting the image 21 to the user, and directing the display image 21 to the optical path changing unit 3 at the second position 12 to present an aerial image 36 to the user.

The display device 1 also includes a housing 10 that rotatably supports the display unit 2 and whose front surface 100 on the user side can be opened and closed. This housing 10 is arranged on a dashboard 80 . Further, the housing 10 is configured such that its upper portion is exposed to the dashboard 80 . The display device 1 can secure a movement path for the display section 2 by opening and closing the front section 100 . Furthermore, the display device 1 can hide the space for storing the display unit 2 when the display image 21 is presented by the front surface unit 100 .

The display unit 2 has a rotating shaft 23 in the left-right direction of the display screen 20 at the lower end 22 . As shown in FIGS. 2A and 2B, when the display unit 2 is driven from the first position 11 to the second position 12, the drive unit 4 opens the front surface 100 of the housing 10 and rotates the rotation shaft 23 as an axis. After rotating the display unit 2 to the second position 12 as above, the front part 100 is closed, and when driving from the second position 12 to the first position 11, the front part 100 is opened and the rotation shaft 23 is used as an axis The front part 100 is configured to be closed after the display part 2 is rotated to the first position 11 .

Further, as shown in FIGS. 1A and 1B, the display device 1 includes an illuminance measurement unit 5 that measures the illuminance around the display unit 2, and a first measurement of the display unit 2 based on the illuminance measured by the illuminance measurement unit 5. a control unit 7 for controlling the drive unit 4 to switch between the position 11 and the second position 12;

Furthermore, as shown in FIG. 1C, the display device 1 includes an operation detection unit 6 that detects an operation on the aerial image formation 36 by a detection target. When an operation on the operation target image included in the aerial image formation 36 is detected based on the detection result of the operation detection unit ₆ , the control unit 7 outputs operation information S6 for executing a function assigned to the operation target image. is configured to

1A and 1B show a rectangular operation target image 15 as an example. A function of the controlled device 85 is assigned to the operation target image 15 . The user can cause the controlled device 85 to perform the desired function by performing a touch operation on the operation target image 15 of the desired function with the operation finger 9 to be detected.

(Configuration of display unit 2)
The display unit 2 is, for example, a touch panel that receives touch operations and the like, but is not limited to this, and may be configured only with a display. The display unit 2 includes, for example, an organic EL (Electro-Luminescence) display that displays a display image 21 and a touch sensor that detects a touch operation or the like on the display image 21 . The display unit 2 may be a liquid crystal display or the like. This touch sensor is, for example, a capacitive touch sensor, and is configured using a plurality of intersecting transparent electrodes.

The display unit 2 displays a display image 21 based on the display information S1 output from the control unit 7, as shown in FIG. _1C . This display information S1 is information of an image to be displayed on the display section ₂ generated by the control section ₇ based on the image information S7 obtained from the controlled device 85. FIG.

Further, when the contact of the operating finger 9 is detected, the display section ₂ outputs the detection information S2 including the information of the coordinates on the display screen 20 where the contact is detected to the control section 7 .

As shown in FIG. 2A, the display unit 2 of the present embodiment is upright at the first position 11, but is not limited thereto, and is tilted according to the display area 35 where the aerial image 36 is displayed. The position may be the first position 11 . Also, the display unit 2 may be supported so that the user can change the tilt angle.

(Configuration of Optical Path Changing Unit 3)
As shown in FIGS. 2A and 2B, the optical path changing unit 3 of the present embodiment includes a retroreflective member 30 that reflects incident light 25 in a direction parallel to the incident direction, and a retroreflective member 30 that transmits part of the incident light 25. and a beam splitter 31 for reflecting the others. The display unit 2 outputs the light 25 from the display screen 20 to the retroreflective member 30 and the beam splitter 31 at the second position 12 shown in FIG. 2B.

The retroreflective member 30 is a prism-type or microbead-type retroreflective element. The retroreflective member 30 of the present embodiment is, for example, a microbead type retroreflective element. The retroreflective member 30 has a plurality of minute ball lenses with a refractive index of about 2 arranged side by side in the vertical and horizontal directions of the incident surface 300 .

The retroreflective member 30 is arranged at an angle of approximately 90° with the display section 2 at the second position 12, as shown in FIGS. 2A and 2B. Note that the angle between the retroreflective member 30 and the display section 2 is not limited to 90°.

As shown in FIGS. 2A and 2B, the beam splitter 31 has an incident surface 310 on which the light 25 is incident, and an exit surface 311 which is a surface on the back side of the incident surface 310 and from which the light 25 exits. The beam splitter 31 has, for example, a reflecting film formed of a thin film of silver or aluminum on the incident surface 310 .

The beam splitter 31 reflects part of the light 25 incident on the incident surface 310 and emits the other part from the exit surface 311 to the display area 35 .

The beam splitter 31 is arranged in the upper part of the housing 10 so that the emission surface 311 is exposed on the upper surface 800 of the dashboard 80 . The display screen 20 and the display area 35 of the display unit 2 at the second position 12 have a plane-symmetrical relationship with the beam splitter 31 as a plane of symmetry. In other words, the display screen 20 and the display area 35 have a rotationally symmetrical relationship about a straight line passing through the center of the beam splitter 31 in the plane of FIG. 2B.

In addition, the beam splitter 31 may have the exit surface 311 smoked to suppress the light transmittance so that the inside of the housing 10 is difficult to see.

Display Image 21 and Aerial Image 36 The optical path 26 of the light 25 emitted from the display screen 20 of the display unit 2 at the second position 12 is first changed by the beam splitter 31 . Next, part of the light 25 incident on the incident surface 310 of the beam splitter 31 is reflected in the direction of the retroreflective member 30, and the optical path 26 is changed.

Next, the light 25 incident on the incident surface 300 of the retroreflective member 30 is reflected in a direction parallel to and opposite to the incident light 25, and the optical path 26 is changed. The light 25 reflected by the retroreflective member 30 is incident on the incident surface 310 of the beam splitter 31 , partially transmitted, emitted from the exit surface 311 and converged to form an aerial image 36 in the display area 35 .

A solid-line arrow on the display unit 2 side shown in FIG. 2B is the display image 21 displayed on the display unit 2 . A solid-line arrow on the display area 35 side shown in FIG. 2B is an aerial image 36 displayed in the display area 35 . Note that the direction of the arrow indicates the orientation of the displayed image, as an example.

Since the display image 21 displayed on the display screen 20 at the first position 11 and the aerial image 36 displayed on the display area 35 at the second position 12 are images in the same direction, the display unit 2 displays the first There is no need to invert the displayed image 21 at the position 11 and the second position 12 .

Note that the position of the aerial image formation 36 is mainly determined by the positions of the display unit 2 and the beam splitter 31 . Therefore, when the aerial image formation 36 is tilted toward the user from the plane of FIG. 2B, that is, tilted counterclockwise, the display section 2 and the beam splitter 31 should be moved counterclockwise.

(Configuration of drive unit 4)
The drive unit 4, for example, drives the display unit 2 and the front surface unit 100 separately, and includes a motor and gears. The drive section 4 is connected to the control section 7 and drives the display section 2 and the front section 100 based _on the drive signal S3 output from the control section 7 .

When driving the display unit 2 from the first position 11 to the second position 12 based on the drive signal S3 _, as shown in FIG. After the front part 100 is rotated, the display part 2 is rotated counterclockwise around the rotation shaft 23 . After rotating the display unit 2 to the second position 12, the driving unit 4 rotates the front surface unit 100 clockwise. A rotation axis 101 of the front face portion 100 is parallel to the rotation axis 23 of the display portion 2 .

An angle from the first position 11 to the second position 12 is, for example, 225°, but is not limited to this. The opening 102 formed when the front surface 100 is opened has a size that allows the display unit 2 to rotate, as shown in FIG. 2B. Note that the display device 1 may be provided with a stopper that defines the second position 12 of the display section 2 .

As shown in FIG. 2B, when driving the display unit 2 from the second position 12 to the first position 11 based on the drive signal S3 _, the drive unit 4 first rotates counterclockwise about the rotation shaft 101 After the front part 100 is rotated, the display part 2 is rotated clockwise about the rotation shaft 23 . After rotating the display unit 2 to the first position 11, the driving unit 4 rotates the front surface unit 100 clockwise.

Note that the front part 100 is not limited to rotation, and may be configured to slide in the horizontal direction or in the vertical direction.

(Configuration of illuminance measurement unit 5)
The illuminance measurement unit 5 is arranged on the upper surface 10a of the housing 10 near the display unit 2 and the display area 35, as shown in FIGS. 1A and 1B. The illuminance measuring unit 5 may be arranged on the upper surface 800 of the dashboard 80 near the display unit 2 and the display area 35 .

The illuminance measurement unit 5 is, for example, an illuminance sensor configured using a photodiode. The illuminance measurement unit 5 outputs illuminance information S ₄ including information on the measured illuminance to the control unit 7 .

When the display device 1 does not include the illuminance measuring unit 5, for example, when the headlights of the vehicle 8 are off, the display unit 2 is switched to the second position 12, and when the headlights are on, the display unit 2 is switched to the first position 11. Alternatively, a configuration including a switch for switching between the first position 11 and the second position 12 may be employed.

In addition, the display device 1 can be moved to the first position 11 and the second position by the user performing a touch operation, a push operation, or the like on the display screen 20 of the display unit 2 and the image displayed on the aerial image formation 36 . 12 may be switchable, that is, switchable between presentation of the display image 21 and presentation of the aerial image 36 .

(Configuration of Operation Detection Unit 6)
The operation detection unit 6 is, for example, a distance sensor that measures the distance from the display area 35 to the detection target. As shown in FIGS. 2A and 2B, the operation detection unit 6 is arranged on the upper surface 10a of the housing 10 on the side of the end 312 of the beam splitter 31 away from the display unit 2, but is not limited to this. , the top surface 800 of the dashboard 80 . The operation detection unit 6 is not limited to a distance sensor, and may be configured to detect an operation on the aerial image 36 by a detection target using a camera that captures an image of the display area 35 .

The operation detection unit 6 measures the position of the display area 35 touched by the operation finger 9 based on the distance from the display area 35 to the operation finger 9 as a detection target, and controls operation detection information _S5 including position information. Output to part 7. Further, the operation detection unit 6 detects a tracing operation or a touch operation performed on the display area 35, or detects gestures such as sweeping a hand performed near the display area 35 or drawing a specific figure. , and outputs operation detection information S5 including gesture information to the control unit ₇ .

(Configuration of control unit 7)
The control unit 7 includes, for example, a CPU (Central Processing Unit) that performs calculations and processing on acquired data according to a stored program, a semiconductor memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory). It is a microcomputer that This ROM stores, for example, a program for operating the control unit 7 . The RAM is used, for example, as a storage area for temporarily storing calculation results and the like.

The controller 7 has an illuminance threshold 70 . When the illuminance measured by the illuminance measuring unit 5 is equal to or higher than the illuminance threshold value 70, the control unit 7 presents the display image 21 of the display unit 2 to the user, and when the illuminance value is smaller than the illuminance threshold value 70, the control unit 7 presents the user with an aerial connection. An image 36 is presented.

As an example, the display device 1 presents the aerial image 36 when the user turns on the power of the vehicle 8, but is not limited to this. may be determined based on the illuminance when the power is turned on.

The control unit ₇ causes the display unit 2 to display the display image 21 based on the image information S7 obtained from the controlled device 85 . Further, the control unit ₇ outputs the operation target image 15 of the aerial imaging 36 operated based on the operation detection information S5 obtained from the operation detection unit ₆ and the image information S7 obtained from the controlled device 85. judge.

If the control unit 7 determines that an operation has been performed on the operation target image 15, the control unit ₇ generates operation information S6 including information on the operation target image 15 that has been operated, and outputs the operation information S6 to the controlled device 85. . The controlled device 85 executes the function assigned to the operation target image 15 operated based _on the acquired operation information S6.

Note that when the illuminance is lower than the illuminance threshold 70 and the image to be displayed is an image with content that is prioritized over securing the forward field of view, the control unit 7 does not present the aerial image formation 36, but displays the image displayed by the display unit 2. 21 will be given priority. If the illuminance is less than the illuminance threshold value 70 and the content of the image is not given priority over securing the front view, the control unit 7 presents the aerial image formation 36 .

(About modification)
FIG. 3A is an explanatory diagram schematically showing a state in which the display device of the modification is at the first position, and FIG. 3B is an explanatory diagram schematically showing the state in which the display device is at the second position. .

In this modification, the optical path changing unit 3 causes the light 25 of the display unit 2 incident on the incident surface 320 to be emitted from the emitting surface 321 instead of the retroreflective member 30 and the beam splitter 31, and forms an aerial image 36 in the display area 35. It is configured as an imaging member 32 for imaging. The imaging member 32 is arranged so that the output surface 321 is exposed on the upper surface 10a of the housing 10, as shown in FIGS. 3A and 3B.

The imaging member 32 is composed of, for example, a large number of micromirrors, a large number of microholes, a large number of dihedral reflectors, and the like. As an example, the imaging member 32 of the present embodiment is configured by forming micromirrors that are combined perpendicularly to the side surfaces of the holes and arranging them vertically and horizontally.

As shown in FIG. 3B, the imaging member 32 forms an aerial image 36 at a plane-symmetrical position with the imaging member 32 as a plane of symmetry. That is, the angle α from the imaging member 32 to the display screen 20 of the display unit 2 is equal to the angle α from the imaging member 32 to the display area 35 as shown in FIG. 3B.

Note that, as shown in FIG. 3B, the imaging member 32 intersects the light 25 after exiting from the imaging member 32, thereby generating an aerial image 36 in which the display image 21 displayed on the display unit 2 is inverted. . Therefore, the control unit 7 displays the display image 21 in which the display image 21 at the first position 11 is reversed at the second position 12 .

An example of the operation of the display device 1 of this embodiment will be described below according to the flowchart of FIG. It is assumed that the display device 1 presents the aerial image 36 after the user turns on the power of the vehicle 8 .

(motion)
When the control unit 7 of the display device ₁ acquires the illuminance information S4 from the illuminance measurement unit 5 (Step 1), it compares the illuminance based _on the illuminance information S4 with the illuminance threshold value 70 .

If the illuminance is lower than the illuminance threshold value 70 (Step 2: Yes), the controller 7 continues presenting the aerial image 36 (Step 3).

Here, in step 2, the control unit 7 outputs the driving signal S3 to the driving unit ₄ when the illuminance is equal to or higher than the illuminance threshold value 70 (Step 2: No). The driving unit 4 switches from presentation of the aerial image formation 36 to presentation of the display image 21 (Step 4).

The drive unit 4 rotates the front surface unit 100 counterclockwise about the rotation shaft 101 based on the acquired drive signal S3 _, and then rotates the display unit 2 clockwise about the rotation shaft 23 . After rotating the display unit 2 to the first position 11, the driving unit 4 rotates the front surface unit 100 clockwise.

After switching from the aerial image formation 36 to the display image 21, the control unit 7 may continue presenting the display image 21 even if the illuminance becomes lower than the illuminance threshold value 70, or may continue to present the display image 21 within a predetermined time. If so, the presentation of the display image 21 may be continued and then switched to the aerial imaging 36 when the illuminance becomes smaller than the illuminance threshold value 70 .

(Effect of the first embodiment)
The display device 1 according to this embodiment can improve convenience. Specifically, the display device 1 presents the display image 21 to the user at the first position 11, and presents the aerial image 36 to the user at the second position 12. Therefore, the presentation of the display image 21 makes the display image 21 easier to see than the presentation of the aerial image 36, and the presentation of the aerial image 36 gives the user a feeling of being closed or obstructs the view more than the presentation of the display image 21. can be suppressed. Therefore, the display device 1 can improve convenience.

In the display device 1, the display unit 2 is configured as a touch panel for receiving touch operations and the like, and the operation detection unit 6 for detecting touch operations and the like on the aerial image formation 36 is provided. , there is no need to provide an additional operation unit, and the cost is suppressed and the operability is high.

Since the display device 1 can switch between presentation of the display image 21 and presentation of the aerial image 36 on a single display, the cost is suppressed compared to the case where a plurality of displays are provided.

[Second embodiment]
The second embodiment differs from the other embodiments in that the display section 2 and the beam splitter 31 rotate.

FIG. 5A is an explanatory diagram schematically showing a state in which the display device is at the first position, and FIG. 5B is an explanatory diagram schematically showing a state in which the display device is at the second position. In the embodiments described below, portions having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof will be omitted.

As shown in FIGS. 5A and 5B, the display device 1 includes a housing 10 that rotatably supports the display section 2 and supports the optical path changing section 3 so that it can be opened and closed. The display unit 2 has a rotation shaft 23 in the left-right direction of the display screen 20 at the lower end 22 . When driving the display unit 2 from the first position 11 to the second position 12, the driving unit 4 opens the optical path changing unit 3 and rotates the display unit 2 to the second position 12 about the rotation shaft 23. After that, when driving from the second position 12 to the first position 11 by closing the optical path changing unit 3, the optical path changing unit 3 is opened and the display unit 2 is rotated to the first position 11 about the rotation shaft 23. After that, the optical path changing unit 3 is closed.

The optical path changing section 3 includes a retroreflective member 30 and a beam splitter 31 . The openable/closable optical path changing section 3 of the present embodiment is a beam splitter 31 . The beam splitter 31 is configured to rotate about a rotating shaft 313 provided at an end portion 312 away from the display section 2 . This rotation axis 313 is parallel to the rotation axis 23 of the display unit 2 . In the display device 1, the opening 103 is formed by rotating the beam splitter 31, and the display section 2 can be rotated. Note that the beam splitter 31 is not limited to rotating, and may be configured to slide in the horizontal direction.

When driving the display unit 2 from the first position 11 to the second position ₁₂ based on the drive signal S3 as shown in FIG. After the splitter 31 is rotated, the display unit 2 is rotated clockwise around the rotation shaft 23 . After rotating the display unit 2 to the second position 12, the drive unit 4 rotates the beam splitter 31 counterclockwise. Note that the display device 1 may be provided with a stopper that defines the second position 12 of the display section 2 . Further, the display device 1 may be provided with a stopper that defines the closed state of the beam splitter 31 .

When driving the display unit 2 from the second position 12 to the first position 11 based on the drive signal S3 _, as shown in FIG. After the beam splitter 31 is rotated, the display unit 2 is rotated counterclockwise around the rotation shaft 23 . After rotating the display unit 2 to the first position 11, the drive unit 4 rotates the beam splitter 31 counterclockwise.

As a modification, the optical path changing section 3 may be configured by the imaging member 32 as in the modification described above. Like the beam splitter 31 , the imaging member 32 has a rotation axis at the end remote from the display section 2 .

In this modified example, when driving the display unit 2 from the first position 11 to the second position 12 based on the drive signal S3 _, the driving unit 4 first rotates the imaging member 32 clockwise about the rotation axis. After rotating, the display unit 2 is rotated clockwise around the rotating shaft 23 . After rotating the display unit 2 to the second position 12, the drive unit 4 rotates the imaging member 32 counterclockwise.

When driving the display unit 2 from the second position 12 to the first position 11 based on the drive signal S3 _, the driving unit 4 first rotates the imaging member 32 clockwise around the rotation axis. After that, the display unit 2 is rotated counterclockwise around the rotating shaft 23 . After rotating the display unit 2 to the first position 11, the driving unit 4 rotates the imaging member 32 counterclockwise.

(Effect of Second Embodiment)
In the display device 1 of the present embodiment, the beam splitter 31, which is difficult for the user to see, opens and closes, and the display unit 2 rotates in the direction of the beam splitter 31 of the vehicle 8. At the time of switching, it is difficult for the user to see the space in which the display unit 2 is stored, that is, the inside of the housing 10, and the appearance is good.

[Third embodiment]
The third embodiment differs from the other embodiments in that the display section rotates at the first position and then slides to the second position.

FIG. 6A is an explanatory diagram schematically showing a state in which the display device is at the first position, and FIG. 6B is an explanatory diagram schematically showing a state in which the display device is at the second position.

As shown in FIGS. 6A and 6B, the drive unit 4 of the present embodiment rotates the display unit 2 by 180° so that the display screen 20 is on the opposite side at the first position 11, and then moves to the second position. It is configured to move up to 12.

The display unit 2 has a rotating shaft 23 and a rotating shaft 24 in a direction intersecting the rotating shaft 23, as shown in FIGS. 6A and 6B. The rotation axis 24 is an axis for turning the display screen 20 from the user side to the windshield 83 side of the vehicle 8 .

As an example, as shown in FIG. 6B , the drive unit 4 of the present embodiment rotates the display screen 20 from the first position 11 so that the display screen 20 is on the opposite side, and then moves to the third position 13 by rotating the rotation shaft 23 . , and is slid into the housing 10 from the third position 13 to move the display unit 2 to the second position 12 . As shown in FIGS. 6A and 6B, the housing 10 is provided with an opening 104 through which the display section 2 can slide.

This third position 13 is a position defined by the second position 12 . An angle from the first position 11 to the third position 13 is, for example, 45°, but is not limited to this.

The display 2 slides linearly from the third position 13 to the second position 12 . A slide guide 16 shown in FIGS. 6A and 6B guides the slide from the third position 13 to the second position 12 of the display 2 . The slide guide 16 also has a stopper 17 at its end, and this stopper 17 defines the second position 12 of the display section 2 .

When driving the display unit 2 from the first position 11 to the second position ₁₂ based on the drive signal S3 as shown in FIG. The display unit 2 is rotated by 180° as an axis so that the display screen 20 faces the windshield 83 side. Subsequently, the drive unit 4 rotates the display unit 2 counterclockwise about the rotation shaft 23 and then guides the display unit 2 to the second position 12 by the slide guide 16 and slides the display unit 2 .

As shown in FIG. 6B, when driving the display unit 2 from the second position 12 to the first position 11 based on the drive signal S3 _, the driving unit 4 first shifts from the second position 12 to the third position. 13 along the slide guide 16. Subsequently, the drive unit 4 rotates the display unit 2 clockwise about the rotation shaft 23 at the third position 13 to the first position 11, and then rotates the rotation shaft 24 at the first position 11. The display unit 2 is rotated by 180° as an axis.

(Effect of the third embodiment)
In the display device 1 of the present embodiment, the opening 104 is smaller than in the case where the optical path changing unit 3 rotates.

The display device 1 of at least one embodiment described above can improve convenience.

Although several embodiments and modifications of the present invention have been described above, these embodiments and modifications are merely examples and do not limit the scope of the invention according to the claims. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, etc. can be made without departing from the scope of the present invention. Moreover, not all the combinations of features described in these embodiments and modifications are essential to the means for solving the problems of the invention. Furthermore, these embodiments and modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

1 display device 2 display unit 3 optical path change unit 4 drive unit 5 illuminance measurement unit 6 operation detection unit 7 control unit 10 housings 11 to 13 first to third positions 20 display screen 21 display image 22

end

23, 24 rotation axis 25 light 26 optical path 30 retroreflection member 31 beam splitter 35 display area 36 aerial image formation 100 front part 101 rotation axis 313 rotation axis

Claims

a display unit for displaying a display image on a display screen;
an optical path changing unit that changes an optical path of light output from the display screen to form an image on a display area in the air to generate an aerial image based on the display image;
driving the display unit to a first position and a second position, directly presenting the display image to the user at the second position, and directing the display image toward the optical path changing unit at the second position; a driving unit for presenting the aerial image formation to a user;
A display device.
A housing that rotatably supports the display unit and whose front part on the user side can be opened and closed,
The display unit has a rotation axis in the left-right direction of the display screen at the lower end,
When driving the display unit from the first position to the second position, the drive unit opens the front surface of the housing and moves the display unit to the second position about the rotation shaft. , the front portion is closed, and when driving from the second position to the first position, the front portion is opened and the display portion is moved to the first position about the rotation axis. closing the front part after rotating;
The display device according to claim 1.
A housing that rotatably supports the display unit and supports the optical path changing unit so that it can be opened and closed,
The display unit has a rotation axis in the left-right direction of the display screen at the lower end,
When driving the display unit from the first position to the second position, the driving unit opens the optical path changing unit and rotates the display unit to the second position about the rotation axis. After that, the optical path changing section is closed, and when driving from the second position to the first position, the optical path changing section is opened and the display section is rotated to the first position about the rotation axis. and then closing the optical path changing unit;
The display device according to claim 1.
The drive unit rotates the display unit by 180° so that the display screen is on the opposite side at the first position, and further moves the display unit to the second position.
The display device according to claim 1.
The optical path changing unit has a retroreflective member that reflects incident light in a direction parallel to the incident direction, and a beam splitter that transmits part of the incident light and reflects the rest,
wherein the display unit outputs light from the display screen to the retroreflective member and the beam splitter at the second position;
The display device according to any one of claims 1 to 4.
The optical path changing unit has an imaging member that causes the light incident on the incident surface to exit from the exit surface and forms an image in the display area as the aerial image,
wherein the display unit outputs light from the display screen to the incident surface of the imaging member at the second position;
The display device according to any one of claims 1 to 4.
an illuminance measurement unit that measures illuminance around the display unit;
a control unit that controls the drive unit to switch the display unit between the first position and the second position based on the illuminance measured by the illuminance measurement unit;
The display device according to any one of claims 1 to 6, comprising:
The control unit has an illuminance threshold, and when the illuminance measured by the illuminance measurement unit is equal to or higher than the illuminance threshold, presents the display image of the display unit to the user, and the illuminance measurement unit presents the aerial imaging to the user if the measured illumination is less than the illumination threshold.
The display device according to claim 7.
The display device is mounted on the vehicle,
When the illuminance measured by the illuminance measuring unit is smaller than the illuminance threshold value and the image to be displayed is an image having content that is prioritized over securing forward visibility, the control unit gives priority to the display image by the display unit. and when the illuminance measured by the illuminance measuring unit is smaller than the illuminance threshold value and the displayed image is an image having content not given priority over securing forward visibility, the aerial imaging is presented.
The display device according to claim 7 or 8.
an operation detection unit that detects an operation on the aerial image formation by a detection target;
The control unit outputs operation information for executing a function assigned to the operation target image when an operation on the operation target image included in the aerial imaging is detected based on the detection result of the operation detection unit. ,
The display device according to any one of claims 7 to 9.