Display device

Abstract

To provide a display device capable of taking countermeasures against stray light according to the position of a driver's eyes while preventing intrusion of dust and dirt into the display device.SOLUTION: An aperture 40 includes: a first edge 41 arranged at the forward side of a moving body in a traveling direction; and a second edge 42 arranged at the rear side of the moving body in a traveling direction. When the display device 1 is mounted on the moving body, with a straight line connecting the top of the first edge 41 and the bottom of the second edge 42 as the reference line, and assuming that the outside light passing along the reference line and entering a light transmitting member 33 is the reference outside light, the reference outside light when the aperture 40 is arranged at the first position reaches a lower position than does the reference outside light when the aperture 40 is arranged at a second position at least in part of the light path after the reference outside light is reflected by the light transmitting member 33.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] Patent Document 1 discloses a head-up display with improved appearance and design. This head-up display includes an adjustment unit that adjusts the projection direction of the projection unit, a lid unit that is provided at the opening so as to be movable in the front-rear direction of the vehicle to form an opening through which a display image passes and has a front bezel and a rear bezel, and a control unit that controls the movement of the lid unit according to the projection direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2014 / 171280 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional head-up displays do not provide any measures for preventing stray light due to external light and dust from entering through the opening. Although it is possible to improve the dustproof effect by installing a light-transmitting member in the opening of the head-up display, there is a problem in that stray light reaches the user's eyes when external light is reflected by the light-transmitting member.

[0005] Therefore, an object of the present disclosure is to provide a display device that can prevent dust and dirt from entering the inside of the display device and can take measures against stray light according to the position of the driver's eyes. [Means for solving the problem]

[0006] A display device according to one aspect of the present disclosure is a display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, the display device comprising: an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light-transmitting member that is located on an optical path of the output image light between the display medium and the image generating unit; and an opening that has an opening formed therein and is arranged so as to be movable along the traveling direction of the moving body between a first position and a second position that is located behind the first position in the traveling direction of the moving body, the opening being a projection of the moving body. a first edge portion disposed on a front side in a traveling direction and a second edge portion disposed on a rear side in the traveling direction of the moving body, and when the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is defined as a reference line, and external light passing along the reference line and incident on the light transmitting member is defined as reference external light, the reference external light when the opening is disposed at the first position reaches a lower position in at least a part of an optical path after the reference external light is reflected by the light transmitting member than the reference external light when the opening is disposed at the second position an acute angle formed between the reference line and the light transmitting member when the opening is disposed at the first position is larger than an acute angle formed between the reference line and the light transmitting member when the opening is disposed at the second position. . A display device according to one aspect of the present disclosure is a display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, the display device comprising: an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light-transmitting member located on an optical path of the output image light between the display medium and the image generating unit; and an opening formed therein and arranged so as to be movable along the traveling direction of the moving body between a first position and a second position that is behind the first position in the traveling direction of the moving body, the opening having a first edge portion arranged on the forward side of the traveling direction of the moving body and a second edge portion arranged on the rear side of the traveling direction of the moving body. and an edge portion, and when the display device is mounted on the moving body, if a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is taken as a reference line, and external light passing along the reference line and entering the light-transmitting member is taken as reference external light, the reference external light when the opening is disposed at the first position reaches a lower position in at least a part of the optical path after the reference external light is reflected by the light-transmitting member than the reference external light when the opening is disposed at the second position, and the reference external light when the opening is disposed at the first position reaches a lower position after being reflected by the display medium than the reference external light when the opening is disposed at the second position. A display device according to one aspect of the present disclosure is a display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, the display device comprising: an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light-transmitting member located on an optical path of the output image light between the display medium and the image generating unit; and an opening formed therein and arranged so as to be movable along the traveling direction of the moving body between a first position and a second position that is behind the first position in the traveling direction of the moving body, the opening having a first edge portion arranged on the forward side of the traveling direction of the moving body and a second edge portion arranged on the rear side of the traveling direction of the moving body. and an edge portion, and when the display device is mounted on the moving body, if a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is taken as a reference line, and external light passing along the reference line and entering the light-transmitting member is taken as reference external light, the reference external light when the opening is disposed at the first position reaches a lower position in at least a part of the optical path after the reference external light is reflected by the light-transmitting member than the reference external light when the opening is disposed at the second position, and the reference external light when the opening is disposed at the first position reaches a lower position at the position of the user than the reference external light when the opening is disposed at the second position. A display device according to one aspect of the present disclosure is a display device that projects an image onto a display medium of a moving body to allow a user to visually recognize a virtual image, the display device including: an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light-transmitting member located on an optical path of the output image light between the display medium and the image generating unit; and an opening formed therein and arranged so as to be movable along the traveling direction of the moving body between a first position and a second position that is behind the first position in the traveling direction of the moving body, the opening being disposed on the first side of the first position in the traveling direction of the moving body. and a second edge portion located rearward in the direction of travel of the moving body, and when the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is defined as a reference line, and external light passing along the reference line and entering the light-transmitting member is defined as reference external light, when the opening is located at the first position, the reference external light reaches a lower position in at least a part of the optical path after the reference external light is reflected by the light-transmitting member than the reference external light when the opening is located at the second position, and the opening is located inside the dashboard of the moving body. A display device according to one aspect of the present disclosure is a display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, and includes an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium, a light-transmitting member located on an optical path of the output image light between the display medium and the image generating unit, and an opening formed therein and arranged so as to be movable along the traveling direction of the moving body between a first position and a second position that is behind the first position in the traveling direction of the moving body, the opening having a first edge portion arranged on the forward side of the traveling direction of the moving body, and a second edge portion located rearward in the traveling direction of the moving body, wherein when the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is defined as a reference line, and external light passing along the reference line and entering the light-transmitting member is defined as reference external light, the reference external light when the opening is located at the first position reaches a lower position in at least a part of the optical path after the reference external light is reflected by the light-transmitting member than the reference external light when the opening is located at the second position, and the light-transmitting member has a light-guiding plate including an output optical element that displays a holographic image.

[0007] Some of these specific aspects may be realized using a system, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized using any combination of a system, a method, an integrated circuit, a computer program, and a recording medium. Effect of the Invention

[0008] According to the display device of the present disclosure, it is possible to prevent dust and dirt from entering the inside of the display device, and to take measures against stray light according to the position of the driver's eyes. [Brief description of the drawings]

[0009] [Figure 1A] FIG. 1A is a diagram showing a vehicle and a display device according to the first embodiment. [Figure 1B] FIG. 1B is a perspective view showing the display device according to the first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view showing the display device according to the first embodiment. [Diagram 3] FIG. 3 is a cross-sectional view showing the internal structure and the front window of the display device according to the first embodiment when the opening of the display device is placed in a first position. [Figure 4A] FIG. 4A is a cross-sectional view showing the internal structure and the front window of the display device in accordance with Embodiment 1 when the opening of the display device is placed in a second position. [Figure 4B] FIG. 4B is an explanatory diagram illustrating the upper end of the first edge portion. [Figure 4C] FIG. 4C is an explanatory diagram illustrating the lower end of the second edge portion. [Diagram 5] FIG. 5 is a diagram showing positions where external light reaches when a conventional light-transmitting member is used, and positions where external light reaches when the light-transmitting member of the embodiment is used. [Figure 6] FIG. 6 is a cross-sectional view showing an internal structure and a front window of a display device according to a modification of the first embodiment when the opening of the display device is placed in a first position. [Figure 7] FIG. 7 is a cross-sectional view showing an internal structure and a front window of a display device according to a modification of the first embodiment when the opening of the display device is placed in a second position. [Figure 8A] FIG. 8A is a cross-sectional view showing a display device according to the second embodiment. [Figure 8B] FIG. 8B is a cross-sectional view showing the display device and the front window according to the second embodiment. [Figure 9] FIG. 9 is a cross-sectional view showing the internal structure and the front window of a display device according to another modified example when the opening of the display device is placed in a first position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, the arrangement and connection of the components, steps, and the order of steps shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in an independent claim are described as optional components. Furthermore, in all embodiments, the contents of each can be combined.

[0011] Moreover, each figure is a schematic diagram and is not necessarily illustrated precisely. In each figure, the same components are given the same reference numerals. Furthermore, in the following embodiments, expressions such as "approximately the same" are used. For example, "approximately the same" does not only mean a perfect match, but also means a substantial match, that is, including an error of, for example, about several percent. Furthermore, "approximately the same" means a match within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "approximately".

[0012] In the following embodiments, the second edge side relative to the first edge side is defined as the X-axis positive direction, the opening side relative to the first housing is defined as the Z-axis positive direction, and the direction perpendicular to the X-axis positive direction and the Z-axis positive direction, and the left side of Fig. 1B is defined as the Y-axis positive direction. The directions in Fig. 1B are also applied to Fig. 2 and subsequent figures.

[0013] The display system of the present disclosure will be specifically described below with reference to the drawings.

[0014] (Embodiment 1) <Configuration> Fig. 1A is a diagram showing a vehicle 2 and a display device 1 according to embodiment 1. Fig. 1B is a perspective view showing the display device 1 according to embodiment 1. Fig. 2 is an exploded perspective view showing the display device 1 according to embodiment 1.

[0015] 1A, 1B, and 2, the display device 1 is disposed, for example, on the dashboard (also called an instrument panel) of a vehicle 2. A windshield 3 (also called a windshield) is disposed above the dashboard of the vehicle 2. The display device 1 is disposed between the dashboard and the windshield 3.

[0016] Here, the windshield 3 is an example of a display medium. The vehicle 2 is an example of a moving body. The moving body may be an aircraft, a ship, or the like, in addition to the vehicle 2.

[0017] The display device 1 can display a virtual image corresponding to an image represented by the image light emitted from the image generation unit 20 to a user such as a driver or a passenger by reflecting the image light representing the image onto the windshield 3. That is, the display device 1 projects the image light constituting the image emitted by the image generation unit 20 forward onto the windshield 3, thereby displaying an image represented by the image light onto the windshield 3. In this way, the display device 1 can project an image onto the windshield 3 of the vehicle 2, allowing the user to visually recognize a virtual image.

[0018] Here, the image light is light that represents image information including numbers, letters, figures, etc., and is displayed as a virtual image in front of the windshield 3. The image is a still image or a moving image, and is an image of numbers, letters, figures, etc.

[0019] Fig. 3 is a cross-sectional view showing the internal structure of the display device 1 and the front window 3 when the opening 40 of the display device 1 according to embodiment 1 is arranged at a first position. Fig. 4A is a cross-sectional view showing the internal structure of the display device 1 and the front window 3 when the opening 40 of the display device 1 according to embodiment 1 is arranged at a second position.

[0020] As shown in FIGS. 3 and 4A, the display device 1 includes a first housing 10, an image generating section 20, a first reflecting mirror 31 and a second reflecting mirror 32, a light transmitting member 33, and an opening 40.

[0021] [First housing 10] The first housing 10 is a housing that houses the image generating unit 20 and the light transmitting member 33. The first housing 10 constitutes an outer shell of the display device 1. The first housing 10 is fixed to the vehicle 2 in a state where it is attached to the dashboard.

[0022] A housing opening 11 for arranging the light transmitting member 33 is formed on the positive Z-axis direction side of the first housing 10. The positive X-axis direction side of the housing opening 11 is warped upward toward the positive Z-axis direction in accordance with the shape of the curved light transmitting member 33. In other words, a part of the positive X-axis direction side of the first housing 10 extends toward the positive Z-axis direction.

[0023] [Image Generation Unit 20] The image generating unit 20 generates an image and outputs image light indicating the generated image so that the image is projected on the windshield 3. Specifically, the image generating unit 20 emits image light from the display unit 25. The image light emitted from the display unit 25 of the image generating unit 20 is reflected by the first reflecting mirror 31, then reflected by the second reflecting mirror 32, enters the light transmitting member 33, passes through the opening of the opening 40, and is emitted from the display device 1 to be projected on the windshield 3. That is, the image generating unit 20 can project a predetermined image on the windshield 3 by emitting image light indicating an image. The image light is reflected on the windshield 3, so that the user can recognize a virtual image. The image generating unit 20 is, for example, a liquid crystal display device having a liquid crystal display or the like.

[0024] The image generating unit 20 includes a display unit 25, a second housing 22, a light emitting module 23, and a condenser lens 24.

[0025] The display unit 25 is a liquid crystal display element such as a liquid crystal display (LCD). For example, the display unit 25 is a light-transmitting or light-semi-transmitting TFT liquid crystal display (Thin Film Transistor Liquid Crystal Display). When light is irradiated from the back side of the display unit 25, the light emitting surface emits light due to the transmitted light. The display unit 25 emits image light showing an image including numbers, letters, figures, etc. from the emitting surface in response to a control instruction from a control unit mounted on the vehicle 2 of FIG. 1A. The display unit 25 is driven by AC power obtained from the vehicle 2 side.

[0026] Moreover, the display unit 25 has an optical axis parallel to the specified direction. In this embodiment, the optical axis is inclined upward toward the positive Z-axis direction with respect to the positive X-axis direction.

[0027] Moreover, the display unit 25 is inclined with respect to a plane perpendicular to the optical axis of the light emitting module 23. Specifically, the display unit 25 is fixed to the second housing 22 so as to be perpendicular to the optical axis.

[0028] The second housing 22 is a housing that houses the light emitting module 23, the condenser lens 24, etc. The second housing 22 is disposed on the bottom plate portion of the first housing 10. The second housing 22 is fixed to the bottom portion of the first housing 10 by a fixing member such as a screw.

[0029] The light emitting module 23 includes a light source and a substrate. The light emitting module 23 is an example of a projection unit.

[0030] The light source is mounted on the board in a position in which it irradiates light from the rear side of the display unit 25 toward the display unit 25 via the condenser lens 24. The light source is configured, for example, with a light emitting diode (LED). For example, the light source is driven by DC power obtained from a power source (not shown) in the vehicle 2. The light source is turned on or off in response to an ON signal or an OFF signal from the control unit.

[0031] The board has a light source mounted on the surface facing condenser lens 24 and display unit 25. The board is supported by second housing 22 in an orientation inclined downward in the positive X-axis direction with respect to the ZY plane.

[0032] The condenser lens 24 is disposed on the side in the emission direction of the light from the light source, and is disposed on the optical path between the light source and the display unit 25. In the present embodiment, the condenser lens 24 is supported by the second housing 22 in a position in which the central axis of the condenser lens 24 substantially coincides with the optical axis of the light source.

[0033] The condenser lens 24 is a lens that condenses light emitted from a light source toward the display unit 25. The light emitted from the condenser lens 24 is irradiated onto the entire rear surface of the display unit 25.

[0034] The condenser lens 24 is made of a light-transmitting material such as glass, transparent resin, etc. In this embodiment, the condenser lens 24 is a convex lens. However, the condenser lens 24 may be a concave lens.

[0035] [First Reflection Mirror 31 and Second Reflection Mirror 32] The first reflecting mirror 31 reflects the image light emitted from the image generating unit 20 toward the second reflecting mirror 32. In addition, the second reflecting mirror 32 reflects the image light emitted from the image generating unit 20 toward the light transmitting member 33.

[0036] Specifically, the first reflecting mirror 31 and the second reflecting mirror 32 are disposed in the first housing 10 so as to face each other with a predetermined distance between them.

[0037] More specifically, the first reflecting mirror 31 is disposed on the positive X-axis side of the first housing 10 so as to face the exit surface of the image generating unit 20 disposed on the negative X-axis side of the first housing 10. The first reflecting mirror 31 is disposed on the positive Z-axis side of the image generating unit 20. The second reflecting mirror 32 is disposed on the negative X-axis side of the first housing 10 so as to face the first reflecting mirror 31 disposed on the positive X-axis side of the first housing 10. That is, the second reflecting mirror 32 is disposed so as to be aligned with the first reflecting mirror 31 along the X-axis direction. The second reflecting mirror 32 is disposed on the positive Z-axis side of the image generating unit 20 in the Z-axis direction.

[0038] That is, the first reflecting mirror 31 and the second reflecting mirror 32 are disposed between the image generating section 20 and the light transmitting member 33 in the Z-axis direction.

[0039] Since the first reflecting mirror 31 and the second reflecting mirror 32 are disposed in the first housing 10 in this manner, the image light emitted by the image generating unit 20 is incident on the first reflecting mirror 31 and reflected by the first reflecting mirror 31, and then incident on the second reflecting mirror 32 and reflected by the second reflecting mirror 32, and then incident on the light transmitting member 33. In other words, the first reflecting mirror 31 is disposed on the optical path between the image generating unit 20 and the second reflecting mirror 32, and the second reflecting mirror 32 is disposed on the optical path between the first reflecting mirror 31 and the light transmitting member 33.

[0040] Thereafter, the image light incident on the light transmitting member 33 passes through the light transmitting member 33, and the image is projected onto the windshield 3.

[0041] The first reflecting mirror 31 and the second reflecting mirror 32 are convex mirrors or concave mirrors. In this embodiment, each of the first reflecting mirror 31 and the second reflecting mirror 32 is a curved concave mirror. In this embodiment, each of the first reflecting mirror 31 and the second reflecting mirror 32 is a rectangular mirror that is elongated in the Z-axis direction. The shapes of the first reflecting mirror 31 and the second reflecting mirror 32 are not particularly limited, and may be polygonal or circular.

[0042] The second reflecting mirror 32 may be able to swing about the Y-axis direction. In this case, it is possible to adjust the position of the image projected onto the windshield 3. The second reflecting mirror 32 may be able to swing by manual operation or by electric operation using a drive mechanism.

[0043] [Light-transmitting material 33] The light transmitting member 33 is a thin plate that is at least partially curved. The light transmitting member 33 has light transmissivity. Therefore, the image light that has passed through the light transmitting member 33 is projected onto the windshield 3.

[0044] Moreover, the light transmitting member 33 is fixed to the first housing 10 so as to cover (block) the housing opening 11 of the first housing 10. Moreover, the light transmitting member 33 is disposed on the Z-axis positive side of the second reflecting mirror 32 in a posture that is approximately parallel to the XY plane. That is, the light transmitting member 33 is located on the optical path of the image light between the front window 3 and the image generating unit 20. Specifically, the light transmitting member 33 is disposed on the optical path between the second reflecting mirror 32 and the front window 3. Therefore, the light transmitting member 33 can transmit the image light emitted by the image generating unit 20 toward the front window 3.

[0045] The light-transmitting member 33 also serves as an anti-fouling cover that prevents dust and dirt from entering the first housing 10. For example, the surface of the light-transmitting member 33 on the windshield 3 side may be hard-coated. In this case, even if dust and dirt adhere to this surface, the dirt can be easily wiped off. The surface of the light-transmitting member 33 on the windshield 3 side is the surface on the positive side of the X-axis of the light-transmitting member 33, and is the exit surface from which image light is emitted.

[0046] Furthermore, the light transmitting member 33 has a curved portion 33a that curves upward as it approaches the direction opposite to the traveling direction. That is, since the positive X-axis direction side of the housing opening 11 extends toward the positive Z-axis direction, the positive X-axis direction side of the light transmitting member 33 curves upward toward the positive Z-axis direction to correspond to the shape of the housing opening 11. The curved portion 33a has an arc shape in a cross-sectional view.

[0047] Furthermore, the light transmitting member 33 may be entirely or partially curved. When the light transmitting member 33 is partially curved, the light transmitting member 33 may have, in addition to the curved portion 33a, a flat portion located on the negative X-axis direction side of the curved portion 33a.

[0048] [Opening 40] The opening 40 is a frame-shaped body in which an opening 40a is formed. Image light that has passed through the light-transmitting member 33 passes through the opening 40a. External light that has entered from the outside of the front window 3 and external light that has been reflected by the light-transmitting member 33 also pass through the opening 40a.

[0049] The opening 40 is disposed on the front window 3 side of the light transmitting member 33 so as to cover the light transmitting member 33. That is, the opening 40a is disposed at a position facing the light transmitting member 33. The opening 40a is disposed so as to overlap at least a portion of the light transmitting member 33 along the Z-axis direction.

[0050] The opening 40 is arranged so as to be movable along the traveling direction of the vehicle 2 between a first position and a second position located behind the first position in the traveling direction of the vehicle 2. That is, the opening 40 is movable along the X-axis direction between a first position arranged on the X-axis minus side with respect to the light transmitting member 33 and a second position arranged on the X-axis plus side with respect to the light transmitting member 33. In this embodiment, when the opening 40 is at the first position, the opening 40a is arranged at a position that does not overlap with the curved portion 33a of the light transmitting member 33 along the Z-axis direction. When the opening 40 is at the second position, the opening 40a is arranged at a position that overlaps with the curved portion 33a of the light transmitting member 33 along the Z-axis direction.

[0051] When the opening 40 moves from the first position to the second position, the opening 40 moves along the surface of the light transmitting member 33, so the second edge 42 of the opening 40 may be raised higher than the first edge 41. In other words, the opening 40 that has moved to the second position has a posture in which the second edge 42 is higher than the first edge 41. On the other hand, when the opening 40 moves from the second position to the first position, the opening 40 moves along the surface of the light transmitting member 33, so the first edge 41 and the second edge 42 of the opening 40 may be at the same height. In other words, the opening 40 that has moved to the first position may have a posture in which the first edge 41 and the second edge 42 are aligned along the XY plane.

[0052] Furthermore, when the housing opening 11 of the first housing 10 is large enough to be inserted into the opening 40a of the opening 40, the opening 40 may be in a position in which the first edge 41 and the second edge 42 are aligned along the XY plane in both the first position and the second position.

[0053] The opening 40 may be movable by manual operation. The opening 40 may be movable by a drive mechanism such as an electric motor, a gear, or a belt. In this case, the opening 40 may be input-operated by an input device mounted on the vehicle 2. The opening 40 may be driven and controlled by a drive mechanism and a control unit that controls the drive mechanism when a sensor mounted on the vehicle detects the position of the user's eyes. That is, the control unit may control the drive mechanism to move the opening 40 when a sensor detects the position of the user's eyes. This allows the opening 40 to automatically move in conjunction with the position of the user's eyes. The control unit is a processor or the like that can execute a program.

[0054] Such an opening 40 has a first edge 41 , a second edge 42 , and a pair of third edges 43 .

[0055] The first edge 41 is disposed on the front side in the traveling direction of the moving body, that is, on the negative X-axis direction side of the second edge 42, facing the second edge 42. The first edge 41 is movable along the X-axis direction together with the movement of the opening 40.

[0056] Moreover, the first edge 41 extends in the positive direction of the Z axis so as to rise up from the light transmitting member 33. The tip of the first edge 41 is disposed at a position higher than the light transmitting member 33. Specifically, the tip of the first edge 41 is disposed at a position higher than the curved portion 33a. This allows the first edge 41 to block external light. In other words, the opening 40 has a light blocking performance.

[0057] The second edge portion 42 is disposed on the rear side in the traveling direction of the vehicle 2, that is, on the positive X-axis direction side of the first edge portion 41. The second edge portion 42 is movable along the X-axis direction together with the movement of the opening portion 40.

[0058] The pair of third edge portions 43 are disposed on both ends of the first edge portion 41 and the second edge portion 42, and are connected to the first edge portion 41 and the second edge portion 42, respectively.

[0059] In this embodiment, when the display device 1 is mounted on the vehicle 2, a straight line connecting an upper end of the first edge 41 and a lower end of the second edge 42 is set as a reference line. In addition, in this embodiment, external light passing along the reference line and entering the light transmitting member 33 is set as reference external light. In this case, the acute angle γ1 formed between the reference line and the light transmitting member 33 when the opening 40 is disposed at the first position may be larger than the acute angle γ2 formed between the reference line and the light transmitting member 33 when the opening 40 is disposed at the second position.

[0060] Here, the upper end of the first edge portion 41 and the lower end of the second edge portion 42 will be described. Fig. 4B is an explanatory diagram illustrating the upper end of the first edge portion 41. Fig. 4C is an explanatory diagram illustrating the lower end of the second edge portion 42. Note that Figs. 4B and 4C only show cross sections of the first edge portion 41, the second edge portion 42, and the light transmitting member 33.

[0061] First, the upper end of the first edge portion 41 is the vertically upper end of the first edge portion 41. However, this is not limited to this. As shown in FIG. 4B, when the upper end of the first edge portion 41 has a curved shape, a straight line that includes the lower end of the second edge portion 42 and is tangent to the first edge portion 41 becomes the reference line. In this case, the contact point of the first edge portion 41 where the straight line is tangent may be defined as the upper end of the first edge portion 41.

[0062] Next, the lower end of the second edge 42 is the vertically lower end of the second edge 42. However, this is not limited to this. As shown in FIG. 4C , when the second edge 42 of the opening 40 does not contact the light-transmitting member 33, that is, when there is a gap between the second edge 42 and the light-transmitting member 33, the intersection point where the extension of the two-dot chain line along the wall surface of the second edge 42 and the light-transmitting member 33 intersect may be defined as the lower end of the second edge 42.

[0063] When the opening 40 is disposed at the first position, the non-reference light reaches a position that is a predetermined distance lower than the eyebox even if the eyebox is located at a higher position relative to the position of the eyes. When the opening 40 is disposed at the second position, the non-reference light reaches a position that is a predetermined distance lower than the eyebox even if the eyebox is located at a lower position relative to the position of the eyes.

[0064] Furthermore, the non-reference light when the opening 40 is disposed at the first position reaches a lower position in at least a part of the optical path after the non-reference light is reflected by the light transmitting member 33 than the non-reference light when the opening 40 is disposed at the second position. In this embodiment, the non-reference light when the opening 40 is disposed at the first position reaches a lower position after being reflected by the windshield 3 than the non-reference light when the opening 40 is disposed at the second position. Specifically, the non-reference light when the opening 40 is disposed at the first position reaches a lower position at the user's position than the non-reference light when the opening 40 is disposed at the second position. In this way, by moving the opening 40, the position of the non-reference light reaching the user can be optimized according to the position of the user's eyes.

[0065] Next, a formula for calculating how the non-reference light reaches a low position at the user's position will be described.

[0066] 5 is a diagram showing the position where external light reaches when a conventional light-transmitting member is used, and the position where external light reaches when the light-transmitting member 33 of the embodiment is used. FIG. 5 illustrates a case where the opening is disposed at the second position. Also, FIG. 5 omits illustration of the second edge, the first housing, and the like. The reference external light incident on the light-transmitting member 33 of the embodiment is shown by a solid line, the conventional light-transmitting member is shown by a two-dot chain line, and the reference external light incident on the conventional light-transmitting member is shown by a two-dot chain line.

[0067] D1 denotes the height from the horizontal line passing through the surface edge on the first edge 41 side of the light transmitting member 33 to the tip of the first edge 41, D2 denotes the height from the horizontal line to the point where the solid non-standard light enters the inner surface of the windshield 3 (the surface on the vehicle interior side), D3 denotes the height from the point where the solid non-standard light enters the inner surface of the windshield 3 to the position on the user where the double-dashed non-standard light reaches, D4 denotes the height from the position on the user where the solid non-standard light reaches to the vertical lower end of the eye placement area shown by the double-dashed line, and D5 denotes the height from the vertical lower end of the eye placement area shown by the double-dashed line to the horizontal line. Also, L1 denotes the width from the intersection of the surface of the conventional light transmitting member and the surface of the light transmitting member 33 to the edge on the user side of the light transmitting member 33, L2 denotes the width from the edge on the user side of the light transmitting member 33 to the point where the solid non-standard light enters the inner surface of the windshield 3, and L3 denotes the width from the point where the light enters the windshield 3 to the user.

[0068] The angle between the horizontal line and the inner surface of the front window 3 on the passenger compartment side is indicated by d. The acute angle between the horizontal line passing through the point where the light enters the conventional light-transmitting member and the two-dot chain line non-reference light that enters the conventional light-transmitting member is indicated by θ. The angle between the horizontal line passing through the point where the light enters the conventional light-transmitting member and the surface (tangent) of the conventional light-transmitting member is indicated by a. The angle between the horizontal line passing through the point where the light enters the conventional light-transmitting member and the light reflected by the conventional light-transmitting member of the two-dot chain line is indicated by θ+2a. The width between the point where the solid line non-reference light enters the light-transmitting member 33 and the point where the two-dot chain line non-reference light enters the conventional light-transmitting member is indicated by ΔT. The angle between the horizontal line passing through the surface edge on the first edge portion 41 side of the light-transmitting member 33 and the surface (tangent) of the solid line non-reference light that enters the light-transmitting member 33 is indicated by g. The angle c indicates the angle between the non-reference light indicated by the two-dot chain line reflected by a conventional light-transmitting member and a line parallel to the vertical direction including the point where the light is incident on the inner surface of the windshield 3. The angle c+2d indicates the angle between the non-reference light indicated by the two-dot chain line reflected on the inner surface of the windshield 3 and a line parallel to the vertical direction including the point where the non-reference light is incident on the inner surface of the windshield 3.

[0069] In this case, the following relations (1) to (6) hold true.

[0070] tan(θ+2a)=D2 / L2 Equation (1) tan(c+2d)=L3 / D3 Equation (2) c=90-(θ+2a) Equation (3) D3=L3 / tan(c+2d)=L3 / tan(90-(θ+2a-2d))=L3×tan(θ+2a-2d) Equation (4) D4=D3-D5 Equation (5) ΔT=L1×(tan(a)-tan(g)) Equation (6)

[0071] In this manner, in the present embodiment, the curvature of the curved portion 33a of the light transmitting member 33 can be made smaller than that of the conventional light transmitting member. In other words, the overall height of the light transmitting member 33 can be made smaller than that of the conventional light transmitting member. For this reason, the display device 1 equipped with the light transmitting member 33 of the present embodiment can be prevented from becoming larger than a display device equipped with a conventional light transmitting member, and deterioration in mountability on the display device 1 can be prevented.

[0072] <Operation> In such a display device 1, the image light emitted from the image generation unit 20 is incident on and reflected by the first reflecting mirror 31, and then incident on the second reflecting mirror 32. The image light incident on the second reflecting mirror 32 is reflected by the second reflecting mirror 32, incident on and passing through the light transmitting member 33, and then emitted from the light transmitting member 33 to be incident on the windshield 3. As the image light enters the windshield 3, an image is projected onto the windshield 3.

[0073] Furthermore, regardless of whether the position of the opening 40 is the first position or the second position, the external light that has passed through the front window 3 passes through the opening 40a of the opening 40 and enters the light-transmitting member 33. The external light that enters the light-transmitting member 33 is reflected by the light-transmitting member 33 and enters the front window 3. The external light that enters the front window 3 is reflected and reaches a position lower than the user's eyebox. By adjusting the position of the opening 40 according to the position of the eyebox, it is possible to prevent light from reaching the user's eyebox.

[0074] <Action and effect> Next, the effects of the display device 1 according to the present embodiment will be described.

[0075] As described above, the display device 1 according to the present embodiment is a display device 1 that projects an image onto a display medium (front windshield 3) of a moving body (vehicle 2) to allow a user to view a virtual image, and includes an image generating unit 20 that generates an image and outputs image light representing the generated image so that the image is projected onto the display medium, a light-transmitting member 33 that is located on the optical path of the output image light between the display medium and the image generating unit 20, and an opening 40 that forms an opening 40a and is arranged so as to be movable along the traveling direction of the moving body between a first position and a second position that is behind the first position in the traveling direction of the moving body. The opening 40 also has a first edge 41 that is arranged on the front side of the traveling direction of the moving body, and a second edge 42 that is arranged on the rear side of the traveling direction of the moving body. Furthermore, when the display device 1 is mounted on a moving body, if a straight line connecting the upper end of the first edge 41 and the lower end of the second edge 42 is taken as a reference line, and external light passing along the reference line and entering the light-transmitting member 33 is taken as reference external light, the reference external light when the opening 40 is positioned at the first position reaches a lower position in at least a part of the optical path after the reference external light is reflected by the light-transmitting member 33 than the reference external light when the opening 40 is positioned at the second position.

[0076] According to this, the light transmitting member 33 can be disposed at a position facing the opening 40a, so that it is possible to prevent dust and dirt from entering through the opening 40a.

[0077] Moreover, by moving the opening 40, it is possible to shift the optical path of the non-standard light after it is reflected by the light transmitting member 33. In other words, since the position of the opening 40 can be adjusted so that the non-standard light does not reach the user's eyes, the user becomes less likely to feel glare from the non-standard light.

[0078] Therefore, according to the display device 1, it is possible to prevent dust and dirt from entering the inside of the display device 1 and to take measures against stray light according to the position of the driver's eyes. As a result, it is possible to prevent stray light due to external light from reaching the user's eyes, so that the user is less likely to feel glare due to external light.

[0079] In the display device 1 according to the present embodiment, the light transmitting member 33 has a curved portion 33a that curves upward as it approaches the opposite direction to the traveling direction.

[0080] According to this, when the opening 40 is disposed at the second position, the reference external light can be made incident on the curved portion 33a. As a result, when the opening 40 is disposed at the second position, the external light can be made incident on the curved portion 33a at a position lower than the eye box.

[0081] Furthermore, in the display device 1 of this embodiment, when the opening 40 is positioned at the first position, the non-reference light reaches a lower position after being reflected by the display medium than the non-reference light when the opening 40 is positioned at the second position.

[0082] According to this, even if the user feels dazzled by external light when the opening 40 is in the second position, the external light can be made to reach a position lower than the eye box position by moving the opening 40 toward the first position. In other words, the position of the opening 40 can be adjusted so that the external light does not reach the user's eyes, so that the user is less likely to feel dazzled by the external light.

[0083] Furthermore, in the display device 1 of this embodiment, the reference outside light when the opening 40 is positioned at the first position reaches a lower position than the reference outside light when the opening 40 is positioned at the second position.

[0084] According to this, even if a short person is riding in the vehicle 2, by moving the opening 40 to the first position, it is possible to prevent external light from reaching the user's eyes.

[0085] In the display device 1 according to the present embodiment, the first edge portion 41 protrudes upward from the light transmitting member 33. The tip of the first edge portion 41 is disposed at a position higher than the light transmitting member 33.

[0086] According to this, by moving the opening 40, the amount of external light incident on the light transmitting member 33 can be reduced. In other words, since the external light can be blocked by the first edge portion 41, the amount of external light taken into the inside of the display device 1 can be reduced. Therefore, the external light that has entered and passed through the light transmitting member 33 is collected and reaches the inside of the image generating unit 20, and the rise in temperature inside the image generating unit 20 can be suppressed. As a result, the deterioration of the image generating unit 20 can be suppressed.

[0087] In the display device 1 according to the present embodiment, the image generating section 20 includes a display section 25 and a projection section (light emitting module 23).

[0088] According to this, the image generating unit 20 can project an image onto the windshield 3 by outputting image light.

[0089] (Modification of the first embodiment) The display device 1 of this modified example differs from the display device of embodiment 1 in that a light transmitting member 33 is provided in the opening 140. Unless otherwise specified, other configurations in this modified example are the same as those in embodiment 1, and the same configurations are denoted by the same reference numerals and detailed description of the configurations will be omitted.

[0090] Fig. 6 is a cross-sectional view showing the internal structure of the display device 1 and the front window 3 when the opening 140 of the display device 1 according to the modification of embodiment 1 is arranged at a first position. Fig. 7 is a cross-sectional view showing the internal structure of the display device 1 and the front window 3 when the opening 140 of the display device 1 according to the modification of embodiment 1 is arranged at a second position.

[0091] In the display device 1 of this modified example, as shown in Fig. 6 and Fig. 7, the light transmitting member 33 is connected to the opening 140. Specifically, the light transmitting member 33 is disposed in the opening 140 so as to cover the entire opening 40a of the opening 140. Therefore, the light transmitting member 33 is movable along the traveling direction of the vehicle 2 together with the opening 140. In this case, another light transmitting member may be disposed in the housing opening 11 of the first housing 10 of this modified example, or another light transmitting member may not be disposed.

[0092] In addition, the light transmitting member 33 is disposed in the opening 40a so as to be curved upward as it approaches the opposite direction to the traveling direction. That is, the curved portion 33a of the light transmitting member 33 is connected to the second edge portion 42, and the portion of the light transmitting member 33 opposite to the curved portion 33a (the portion on the negative X-axis direction side) is connected to the first edge portion 41.

[0093] Here, the lower end of the second edge portion 42 in this embodiment will be described. In this embodiment, since the light transmitting member 33 is disposed in the opening 140, the intersection point where the light transmitting member 33 and the wall surface of the second edge portion 42 intersect may be defined as the lower end of the second edge portion 42.

[0094] In the display device 1 according to this modified example, the light transmitting member 33 is connected to the opening 140 and is movable together with the opening 140 in the traveling direction of the moving body.

[0095] Furthermore, since the light transmitting member 33 can be provided integrally with the opening 140 , the light transmitting member 33 can be moved together with the opening 140 .

[0096] (Embodiment 2) The display device 1 of the present embodiment differs from the display device of embodiment 1 in that the light transmitting member 33 has a light guide plate 60. Unless otherwise specified, the other configurations of the present embodiment are the same as those of embodiment 1, and the same configurations are denoted by the same reference numerals and detailed description of the configurations is omitted.

[0097] <Configuration> Fig. 8A is a cross-sectional view showing the display device 1 according to embodiment 2. Fig. 8B is a cross-sectional view showing the display device 1 and the front window 3 according to embodiment 2.

[0098] 8A, in the display device 1 of the present embodiment, the light transmitting member 33 has a light guide plate 60 including an emission optical element 62 that displays a holographic image. The light guide plate 60 projects image light constituting an image emitted from the display unit 25 of the image generating unit 20 onto the windshield 3, thereby enabling the user to see the holographic image indicated by the image light.

[0099] Specifically, the light guide plate 60 includes a light guide body 61 and an output optical element 62 .

[0100] The light guide 61 is a long plate that is translucent and extends in a predetermined direction from an incident surface 61a The light guide 61 has an incident surface 61a and an exit surface 61b.

[0101] The incident surface 61a is a surface onto which the image light reflected by the reflecting mirror 63 is incident. The incident surface 61a is disposed so as to face the reflecting mirror 63. The incident surface 61a is a part of the rear surface of the light guide plate 60, and is a surface on one end side of the light guide plate 60. The rear surface is a surface of the light guide 61 on the image generating unit 20 side. The incident surface 61a may be a side surface of the light guide plate 60. Therefore, the incident surface 61a is not limited to the rear surface of the light guide 61.

[0102] The exit surface 61b emits the image light that has entered from the entrance surface 61a and has been guided inside, toward the front window 3. The exit surface 61b faces the front window 3 and is separated by a predetermined distance from the front window 3. The exit surface 61b is a part of the surface of the light guide 61. The surface is the surface of the light guide 61 facing the front window 3.

[0103] The emission optical element 62 is a plate-shaped light-transmitting diffraction hologram that is contained inside the light guide 61. The emission optical element 62 is disposed in the longitudinal direction of the light guide 61 along the front and back surfaces of the light guide 61.

[0104] The output optical element 62 receives image light reflected by the reflecting mirror 63 and incident from the incident surface 61a. Every time the image light enters (transmits) the output optical element 62 from a predetermined direction, the output optical element 62 diffracts the image light to cause a portion of the image light to exit from the output surface 61b at a predetermined exit angle via the light guide 61. Specifically, a portion of the image light diffracted by the output optical element 62 exits from the exit surface 61b via the light guide 61, and the remaining image light is diffracted by the output optical element 62 while being guided through the light guide 61, and exits from the exit surface 61b. The exit angle is the angle of the light that exits with respect to the normal to the surface of the output optical element 62.

[0105] Furthermore, the output optical element 62 diverges the output image light so that the output angles of the image light differ in a predetermined region of the output optical element 62. When diffracting the incident image light, the output optical element 62 varies the output angle depending on the position (portion) on the output optical element 62 where the image light is diffracted. As a result, the output optical element 62 varies the output angles of some of the image light diffracted by the output optical element 62.

[0106] The light guide 61 in this embodiment is curved. Therefore, the emission optical element 62 is also curved. Specifically, the light guide 61 and the emission optical element 62 are warped upward as they approach the image generating unit 20. In addition, the front and back surfaces of the light guide 61 are curved surfaces.

[0107] The light guide plate 60 may be disposed in the opening as a light transmitting member so as to cover the entire opening of the opening. Therefore, the light transmitting member 33 may be movable along the traveling direction of the vehicle 2 together with the opening. The light guide plate 60 may be disposed in the housing opening of the first housing.

[0108] <Action and effect> Next, the effects of the display device 1 according to the present embodiment will be described.

[0109] As described above, in the display device 1 according to the present embodiment, the light transmitting member 33 has the light guide plate 60 including the emission optical element 62 that displays a holographic image.

[0110] This allows a holographic image to be projected onto the windshield 3. This allows the user to visually recognize the image in a three-dimensional manner. Therefore, by displaying information related to the traveling of the vehicle 2, the user can easily grasp the information related to the traveling of the vehicle 2, and thus drive the vehicle 2 safely.

[0111] (Other variations, etc.) Although the present disclosure has been described above based on the embodiments, the present disclosure is not limited to these embodiments.

[0112] For example, in the display device 1 according to each of the above-mentioned embodiments, as shown in FIG. 9, the opening 40 may be disposed inside the dashboard 50 of the vehicle 2. FIG. 9 is a cross-sectional view showing the internal structure of the display device 1 and the front windshield 3 when the opening 40 of the display device 1 according to the other modified example is disposed at the first position. According to this, by integrating the light transmitting member 33 with the opening 140, it is possible to suppress the variation in the assembly of the light transmitting member 33 and the opening 140. In addition, by disposing the light transmitting member 33 below the dashboard 50, the external light incident on the light transmitting member 33 at a small angle is blocked by the dashboard 50, so that the acute angle between the reference external light and the light transmitting member 33 can be made as large as possible. Therefore, the external light reaches a position lower than the user's eyes at the user's position. As a result, the user is less likely to feel glare.

[0113] Also, even if the opening 40 is disposed inside the dashboard 50 as shown in FIG. 9, the acute angle formed between the reference line and the light transmitting member 33 when the opening 40 is disposed at the first position may be larger than the acute angle formed between the reference line and the light transmitting member 33 when the opening 40 is disposed at the second position. According to this, the acute angle formed between the reference line and the light transmitting member 33 when the opening 40 is disposed at the first position is set to be larger than the angle when the opening 40 is disposed at the second position. Therefore, by moving the position of the opening 40, it is possible to adjust the external light reflected by the front windshield 3 to reach a position lower than the position of the user's eye box. For example, the external light reflected by the light transmitting member 33 when the opening 40 is disposed at the first position reaches a lower position in at least a part of the optical path after the external light is reflected by the light transmitting member 33 than the external light reflected by the opening 40 when the opening 40 is disposed at the second position. Furthermore, naturally, when a straight line connecting the edge of the opening 50a of the dashboard 50 on the negative X-axis direction side and the lower end of the second edge 42 is taken as a reference line, the acute angle formed between the reference line and the light-transmitting member 33 when the opening 40 is positioned in the first position may be larger than the acute angle formed between the reference line and the light-transmitting member 33 when the opening 40 is positioned in the second position.

[0114] In addition, although the display device according to each of the above embodiments has an opening as a component, when the opening is mounted on a vehicle, the display device may have a configuration excluding the opening as a component requirement.

[0115] In addition, in the display device according to each of the above embodiments, the opening may have a lid that covers the opening of the opening and the light-transmitting member. In other words, when the display device is not in use, the opening and the light-transmitting member are entirely covered with the lid, thereby preventing external light from entering the display device and causing a rise in temperature inside the image generating unit.

[0116] In addition, the present disclosure also includes forms obtained by applying various modifications to the embodiments that a person skilled in the art may conceive, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope that does not deviate from the spirit of the present disclosure. [Industrial Applicability]

[0117] The present disclosure can be used in moving objects such as vehicles. [Explanation of symbols]

[0118] 1 Display device 2. Vehicles (moving objects) 3. Front window (display medium) 20 Image Generation Unit 23 Light emitting module (projection unit) 25 Display section 33 Light-transmitting material 33a Curved section 40, 140 opening 40a opening 41 First edge 42 Second edge 50 Dashboard 60 Light guide plate 62 Output optical element

Claims

1. A display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light transmitting member located on an optical path of the output image light between the display medium and the image generating unit; an opening portion having an opening formed therein and arranged to be movable along the traveling direction of the movable body between a first position and a second position that is located behind the first position in the traveling direction of the movable body; the opening has a first edge portion disposed on a front side in a traveling direction of the moving body and a second edge portion disposed on a rear side in the traveling direction of the moving body, When the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is set as a reference line; If the external light passing along the reference line and incident on the light transmitting member is defined as reference external light, the non-reference light when the opening is disposed at the first position reaches a lower position in at least a part of an optical path after the non-reference light is reflected by the light transmitting member than the non-reference light when the opening is disposed at the second position; An acute angle formed between the reference line and the light transmitting member when the opening is disposed at the first position is larger than an acute angle formed between the reference line and the light transmitting member when the opening is disposed at the second position. Display device.

2. The light transmitting member has a curved portion that curves upward as it approaches the direction opposite to the traveling direction. The display device according to claim 1 .

3. A display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light transmitting member located on an optical path of the output image light between the display medium and the image generating unit; an opening portion having an opening formed therein and arranged to be movable along the traveling direction of the movable body between a first position and a second position that is located behind the first position in the traveling direction of the movable body; the opening has a first edge portion disposed on a front side in a traveling direction of the moving body and a second edge portion disposed on a rear side in the traveling direction of the moving body, When the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is set as a reference line; If the external light passing along the reference line and incident on the light transmitting member is defined as reference external light, the non-reference light when the opening is disposed at the first position reaches a lower position in at least a part of an optical path after the non-reference light is reflected by the light transmitting member than the non-reference light when the opening is disposed at the second position; The reference outside light when the opening is disposed at the first position reaches a lower position after being reflected by the display medium than the reference outside light when the opening is disposed at the second position. Display device.

4. A display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light transmitting member located on an optical path of the output image light between the display medium and the image generating unit; an opening portion having an opening formed therein and arranged to be movable along the traveling direction of the movable body between a first position and a second position that is located behind the first position in the traveling direction of the movable body; the opening has a first edge portion disposed on a front side in a traveling direction of the moving body and a second edge portion disposed on a rear side in the traveling direction of the moving body, When the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is set as a reference line; If the external light passing along the reference line and incident on the light transmitting member is defined as reference external light, the non-reference light when the opening is disposed at the first position reaches a lower position in at least a part of an optical path after the non-reference light is reflected by the light transmitting member than the non-reference light when the opening is disposed at the second position; The reference outside light when the opening is disposed at the first position reaches a lower position at the user's position than the reference outside light when the opening is disposed at the second position. Display device.

5. The light transmitting member is connected to the opening and is movable together with the opening along the traveling direction of the moving body. The display device according to any one of claims 1 to 4.

6. A display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light transmitting member located on an optical path of the output image light between the display medium and the image generating unit; an opening portion having an opening formed therein and arranged to be movable along the traveling direction of the movable body between a first position and a second position that is located behind the first position in the traveling direction of the movable body; the opening has a first edge portion disposed on a front side in a traveling direction of the moving body and a second edge portion disposed on a rear side in the traveling direction of the moving body, When the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is set as a reference line; If the external light passing along the reference line and incident on the light transmitting member is defined as reference external light, the non-reference light when the opening is disposed at the first position reaches a lower position in at least a part of an optical path after the non-reference light is reflected by the light transmitting member than the non-reference light when the opening is disposed at the second position; The opening is disposed inside the dashboard of the vehicle. Display device.

7. The first edge portion protrudes upward from the light transmitting member, The tip of the first edge portion is disposed at a position higher than the light transmitting member. The display device according to any one of claims 1 to 6.

8. The image generating unit includes a display unit and a projection unit. The display device according to any one of claims 1 to 7.

9. A display device that projects an image onto a display medium of a moving body to allow a user to view a virtual image, an image generating unit that generates the image and outputs image light representing the generated image so that the image is projected onto the display medium; a light transmitting member located on an optical path of the output image light between the display medium and the image generating unit; an opening portion having an opening formed therein and arranged to be movable along the traveling direction of the movable body between a first position and a second position that is located behind the first position in the traveling direction of the movable body; the opening has a first edge portion disposed on a front side in a traveling direction of the moving body and a second edge portion disposed on a rear side in the traveling direction of the moving body, When the display device is mounted on the moving body, a straight line connecting an upper end of the first edge portion and a lower end of the second edge portion is set as a reference line; If the external light passing along the reference line and incident on the light transmitting member is defined as reference external light, the non-reference light when the opening is disposed at the first position reaches a lower position in at least a part of an optical path after the non-reference light is reflected by the light transmitting member than the non-reference light when the opening is disposed at the second position; The light transmitting member has a light guide plate including an output optical element that displays a holographic image. Display device.

Images