CN219266667U

CN219266667U - Head-up display device

Info

Publication number: CN219266667U
Application number: CN202223422432.0U
Authority: CN
Inventors: 金野千明; 梶川启之; 小野长平; 三泽昭央
Original assignee: Maxell Ltd
Current assignee: Maxell Ltd
Priority date: 2022-06-13
Filing date: 2022-12-16
Publication date: 2023-06-27
Anticipated expiration: 2032-12-16
Also published as: WO2023243213A1; JP2023181839A; CN117233964A

Abstract

The utility model provides a head-up display device which can reflect image light on an image light reflecting surface standing in front of a user to perform good display. According to the present utility model, "object 3" which is a sustainable development object: good health and well-being. The head-up display device is a head-up display device for a vehicle. The head-up display device includes an image display device and an image light projecting section. The image display device generates image light and emits the image light as emission light. The image light projecting unit reflects the outgoing light emitted from the image display device and projects the outgoing light onto the display area of the vehicle. The head-up display device is disposed in front of the driver of the vehicle, and is configured such that the outgoing light reflected by the image light projecting unit is directed to the front side of the vehicle.

Description

Head-up display device

Technical Field

The present utility model relates to a head-up display device.

Background

Conventionally, a head-up display device (hereinafter, sometimes referred to as a HUD device) capable of displaying various information has been known. The HUD device displays information to a user by reflecting image light on an image light reflecting surface (for example, a windshield of a vehicle).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2022-027798

Disclosure of Invention

Technical problem to be solved by the utility model

However, in the conventional configuration, when the image light reflection surface is provided upright in front of the user, it is considered that it is not easy to realize a good display.

Accordingly, an object of the present utility model is to provide a HUD device capable of reflecting image light on an image light reflecting surface standing in front of a user to perform a good display.

Technical means for solving the problems

According to the present utility model, the following HUD device is provided. The HUD device is a HUD device for a vehicle. The HUD device includes an image display device and an image light projecting unit. The image display device generates image light and emits the image light as emission light. The image light projecting unit reflects the outgoing light emitted from the image display device and projects the reflected light onto a display area of the vehicle. The HUD device is disposed in front of the driver of the vehicle, and is configured such that the light emitted from the image light projecting unit is directed toward the front side of the vehicle.

In the HUD device, a transmission portion disposed at an opening portion of a housing accommodating the image display device and the image light projecting portion is configured to be recessed inward of the housing.

In the HUD device, a transmission portion disposed at an opening portion of a housing accommodating the image display device and the image light projecting portion is planar, and an angle formed between a windshield or a windshield of a vehicle and the planar transmission portion is set to 55 ° or more and 90 ° or less.

In this HUD device, a polarizing filter is not disposed between the display area and the image display device on the optical path of the image light.

The HUD device includes a first surface, a transmission portion for transmitting the light emitted from the image light projecting portion is provided on the first surface, the HUD device is disposed inside a dashboard of the vehicle, the dashboard includes a second surface, an opening through which the light emitted passes is formed on the second surface, a curvature of the second surface is set to form a curved surface distant from the first surface, and a curvature of the first surface is set to form a curved surface distant from the second surface with respect to the second surface.

Effects of the utility model

The present utility model can provide a HUD device capable of reflecting image light on an image light reflecting surface standing in front of a user to perform a good display.

Drawings

Fig. 1 is a schematic diagram showing a configuration example of a vehicle mounted with a head-up display device (HUD device).

Fig. 2 is a schematic diagram showing a configuration example of an image display unit and the like constituting the HUD device, with respect to a conventional configuration.

Fig. 3 is a schematic diagram showing a more detailed configuration example of the video display unit of fig. 2, with respect to the conventional configuration.

Fig. 4 is a perspective view showing an external appearance example of a HUD device including the video display unit of fig. 3, which is related to a conventional configuration.

Fig. 5 is a functional block diagram showing a configuration example of a control system of the HUD device of fig. 1.

Fig. 6 is a functional block diagram showing an example of a configuration of the vehicle information acquisition unit of fig. 5.

Fig. 7 is a schematic diagram showing a configuration example of an image display unit and the like constituting the HUD device according to the first embodiment of the present utility model.

Fig. 8 is a diagram showing an example in which the configuration of the HUD device is changed in fig. 7.

Fig. 9 is a schematic diagram showing a configuration example of an image display unit and the like constituting the HUD device according to the second embodiment of the present utility model.

Fig. 10 is a diagram showing an example of the configuration of the HUD device modified in fig. 9.

Detailed Description

Hereinafter, embodiments of the present utility model will be described in detail with reference to the accompanying drawings. In the drawings, the same portions are denoted by the same reference numerals in principle, and duplicate descriptions are omitted. In the drawings, the actual position, size, shape, range, and the like of each component may not be shown in order to facilitate understanding of the present utility model.

In the description of the processing by the program, the function, the processing unit, and the like are mainly described in some cases, and the main body of the processing unit is a processor, a controller formed by the processor, a device, a computer, a system, and the like. The computer executes processing conforming to the program read onto the memory while using the processor as appropriate to use the resources of the memory, the communication interface, and the like. Thereby, a predetermined function, a processing unit, and the like are realized. The processor is constituted by a semiconductor device such as a CPU or GPU, for example. The processor is constituted by a device and a circuit capable of performing a predetermined operation. The processing is not limited to software program processing, but may be a dedicated circuit. Dedicated circuitry can be applied FPGA, ASIC, CPLD, etc.

An outline of the HUD device will be described with reference to fig. 1. A general HUD structure will be described with reference to fig. 2 to 4. In this example, the HUD device is configured to include a light source device and a display panel.

The light source device 100 shown in fig. 3 and the like is configured using, for example, a semiconductor light source element as a light source, and generates predetermined light source light to be supplied to an LCD. The light source device 100 functions as a backlight of an LCD. As the semiconductor light source element, a LED (Light Emitting Diode) element is typically used. The light source device 100 in this embodiment includes a light source (LED circuit board), a collimator, a light guide, a polarization conversion element, and a diffusion plate, and the polarization conversion element is disposed not between the collimator and the light guide (in other words, the front stage of the light guide) but between the light guide and the diffusion plate (or display panel) (in other words, the rear stage of the light guide). The light source device 100 may have other configurations.

The light source device 100 converts light of random polarization from the light guide into light of linear polarization by using a polarization conversion element at the rear stage of the light guide. Therefore, even if there is a residual stress in the light guide, the influence of the residual stress, that is, the change in the polarization state can be dealt with by the conversion to linear polarization by the polarization conversion element. The incident light that enters the LCD panel 64 becomes light from which the influence of residual stress is eliminated, that is, from which the change in polarization state is eliminated. In other words, the light source device 100 can eliminate the influence on polarization caused by the residual stress of the light guide.

In particular, the polarization conversion element may be disposed in the vicinity of the LCD panel 64 (at a position closer to the LCD panel 64 than the light guide). A diffusion plate or the like may be disposed between the polarization conversion element and the LCD panel 64. A thin lens or fresnel lens may also be disposed as an optical element between the polarization conversion element and the LCD panel 64. The function of the optical element (thin lens or fresnel lens) is to perform light distribution control (control of light incidence angle and area) on light that has passed through the lens 63 (fig. 3) at the rear stage of the LCD panel 64. The optical element may be disposed on either one of the front and rear sides with respect to the diffusion plate. The optical element and the diffusion plate may also be an integral component.

HUD device and vehicle

Fig. 1 is a schematic diagram showing a configuration example of a vehicle 2 mounted with a head-up display device (HUD device) 1. The HUD device 1 of fig. 1 is mounted on a vehicle 2. The vehicle 2 is typically an automobile, but is not necessarily limited thereto, and may be a rail vehicle or the like according to circumstances. In fig. 1 and the like, the horizontal direction is the left-right direction, the lateral direction of the vehicle, or the width direction of the vehicle, the vertical direction is the up-down direction and the longitudinal direction of the vehicle, and the horizontal direction orthogonal to the lateral direction of the vehicle is the front-back direction of the vehicle or the traveling direction of the vehicle for the vehicle 2 and the driver.

The HUD device 1 obtains vehicle information 4 from various sensors and the like provided in each part of the vehicle 2. Various sensors detect, for example, various events occurring in the vehicle 2, or periodically detect values of various parameters related to the running condition. The vehicle information 4 includes, for example, speed information, gear information, steering angle information, lamp illumination information, outside light information, distance information, infrared information, engine on/off information, captured image information, acceleration gyro information, GPS (Global Positioning System) information, navigation information, inter-vehicle communication information, road-to-vehicle communication information, and the like of the vehicle 2. The captured image information includes in-vehicle captured image information and out-of-vehicle captured image information. The GPS information includes latitude and longitude, current time information, and the like.

Based on such vehicle information 4, the HUD device 1 projects an image onto the display area 5 of the windshield 3 using the image display unit 12 (fig. 2). Thus, the projected image is superimposed on the scenery as a virtual image 9 corresponding thereto, and the HUD device 1 causes the driver (viewpoint of the driver) 6 of the vehicle 2 to observe such scenery. The windshield 3 or the windshield of the present utility model is referred to as an image light reflecting surface.

Fig. 2 is a schematic diagram showing a configuration example of the image display unit 12 and the like constituting the HUD device 1, which is a part of the vehicle 2 shown in fig. 1. The image display unit 12 is housed in the housing of the HUD device 1. The image display unit 12 of fig. 2 includes an image display device 35, a mirror M1, and a mirror M2. The mirror M1 is a first mirror disposed at a subsequent stage on the optical path. The mirror M1 is, for example, a concave mirror (magnifying mirror), and is provided on the optical path of the image light between the mirror M2 and the display area 5. The mirror M1 functions as an image light projecting unit that projects the image light emitted from the image display device 35 onto the display area 5, thereby causing the projected image light to be viewed as a virtual image by a user such as the driver 6. The mirror M2 is a second mirror disposed at a preceding stage on the optical path. The mirror M2 is, for example, a flat mirror, and is provided on the optical path of the image light between the image display device 35 and the mirror M1. The mirror M2 functions as an image light reflecting portion that reflects the image light from the image display device 35 toward the mirror M1. In the case where the optical path of the image light is to be shortened, only the mirror M1 may be disposed, that is, the mirror M2 may not be disposed. In addition, in the optical path of the image light of the present utility model, no polarization filter is disposed between the display area 5 and the image display device 35. The image light (in other words, projection light) emitted from the image display device 35 is reflected by the mirror M2 or the mirror M2 and the mirror M1 or the mirror M1, and is emitted from the opening 71 (fig. 3) of the housing. The image light emitted from the image display unit 12 passes through the opening 7 of the instrument panel of the vehicle 2 and reaches the display area 5 of the windshield 3. The image light is reflected in the display area 5 of the windshield 3 and reaches the viewpoint 6. The driver can observe this image light as a virtual image 9 from the viewpoint 6.

[ image display Unit ]

Fig. 3 shows a more detailed configuration example of the image display unit 12 of fig. 2. The image display unit 12 of fig. 3 includes an image display device 35, a lens 63, a mirror M2, and a mirror M1. In addition, the angle of the mirror M1 can be adjusted by the driving mechanism 62. The image display device 35, the lens 63, the mirror M2, and the mirror M1 with the driving mechanism 62 in fig. 3 are housed in the case 61. The case 61 is provided with an opening 71. In the configuration example of fig. 3, the optical system for projecting the image light to the display area 5 includes a lens 63, a mirror M2, and a mirror M1. The lens 63 is a correction lens, and the outgoing direction of the light beam to the mirror M1 is adjusted by the lens 63, so that distortion (distortion) correction is performed in accordance with the shape of the mirror M1. In this way, an optical element optimally designed to improve aberration correction capability can be provided between the mirror M1 and the image display device 35.

The image display device 35 includes, for example, a light source device 100 and a display panel 64. The image display device 35 is a projector (projection type image display device) that projects an image formed on the display panel 64 using light emitted from the light source device 100 (in other words, light source light). The light source device 100 is typically configured to include a LED (Light Emitting Diode) light source.

As the display panel 64, a liquid crystal panel (Liquid Crystal Display: LCD) is typical. The display panel 64 generates an image based on the image data instructed and inputted from the control device, and displays the image on the display screen of the display panel 64. The display panel 64 modulates the transmittance of light from the light source device 100 for each pixel according to image data, thereby forming an image for projection onto the display area 5, and emits the image light (in other words, projection light). In the configuration example of fig. 3, the emission direction of the image light from the image display device 35 is the vertical direction (Z direction). The dot-dash arrows indicate the optical axes of the image light.

The display panel 64 is not limited to a liquid crystal panel, and may be a screen panel having a diffusion function. As a mechanism for projecting an image onto a screen plate having a diffusion function, a mechanism in which an image of DMD (Digital Micromirror Device) or a liquid crystal panel is combined with a projection lens to project the image, or a mechanism in which a microelectromechanical system (Micro Electro Mechanical Systems) is used may be employed.

A condenser lens 63 is provided as a lens between the display panel 64 of the image display device 35 and the mirror M2. The condenser lens 63 is a lens for adjusting the optical distance required for forming the virtual image 9, and has a function of magnifying the projection light from the display panel 64 and making it incident on the second mirror M2.

The mirror M1 and the mirror M2 are, for example, free-form-surface mirrors, or mirrors having an optical axis asymmetric shape. The mirror M2 reflects the image light emitted from the image display device 35 toward the mirror M1 through the lens 63. The mirror M1 is, for example, a concave mirror (in other words, a magnifier). The mirror M1 reflects and enlarges the image light reflected by the mirror M2 toward the windshield 3 through the opening 71 at an angle set by the driving mechanism 62, and projects the image light onto the display area 5.

Thus, the driver 6 (fig. 2) observes the image projected onto the display area 5 as a virtual image 9 in front of the transparent windshield 3 in a superimposed manner on a landscape (e.g., road, building, person, etc.) outside the vehicle. Examples of the virtual image 9 as the projection image include a road sign, the current speed of the vehicle, and various information to be attached to an object in a landscape. Thus, an Augmented Reality (AR) function and the like are realized in which various information is added to an object in a landscape and displayed.

In the configuration example of the image display unit 12 in fig. 2 and 3, the position of the display region 5 and the virtual image 9 on the windshield 3 can be adjusted by adjusting the installation angle of the mirror M1 by the driving mechanism 62. The mirror M1 is mounted with a driving mechanism 62 for changing the setting angle of the mirror M1. The driving mechanism 62 is a mechanism including a stepping motor or the like. The driving mechanism 62 changes the setting angle of the mirror M1 based on the control from the control device. In addition, the setting angle of the mirror M1 can also be changed based on a manual operation by the user. Thereby, the position of the virtual image 9 observed by the driver 6 on the display area 5 can be adjusted, for example, in the up-down direction.

In addition, for example, by increasing the area of the mirror M1 or the like, the area of the display area 5 can be enlarged, and more information can be projected onto the display area 5.

Fig. 4 is a perspective view showing an external appearance of an example of mounting the HUD device 1 including the video display unit 12 of fig. 3. An opening 71 is formed in the case 61. A transparent cover member 71a called a glare trap (antiglare shield) or the like is provided in the opening 71. In the case 61, the mirror M1 is provided to reflect light from the mirror M2 toward the cover member 71a of the opening 71.

[ control System of HUD device ]

Fig. 5 is a functional block diagram showing a configuration example of a main part of the control system in the HUD device 1 of fig. 1. Fig. 6 is a functional block diagram showing a configuration example of the vehicle information acquisition unit 15, which is a portion related to acquisition of the vehicle information 4 in fig. 5.

The HUD device 1 of fig. 5 includes a control device 10, an image display unit 12, a speaker 11, and a sunlight sensor 66. The control device 10 is constituted by, for example, an electronic control unit (Electronic Control Unit: ECU). The image display unit 12 has the structure of fig. 2, 3, and fig. 7 to 10 described later. The control device 10 is not limited to being mounted in the housing 61, and may be mounted outside the housing 61.

The control device 10 corresponds to a controller that controls the entire and respective parts of the HUD device 1, and mainly controls the display of the projected video image (virtual image 9) and the control of the audio output in the HUD device 1. The control device 10 is constituted by a wired circuit board or the like, for example. The wired circuit board is mounted in the case 61 of fig. 3 and 4, for example. The control device 10 includes a vehicle information acquisition unit 15, a Microcontroller (MCU) 16, a nonvolatile memory 17, a volatile memory 18, an audio driver 19, a display driver 20, a communication unit 21, and the like, which are mounted on the wiring board.

As is well known, the MCU16 has various peripheral functions in addition to a processor and a memory such as CPU (Central Processing Unit). Accordingly, the modules in the control device 10 other than the MCU16 may be appropriately mounted in the MCU 16. The control device 10 is not limited to the MCU16, and may be implemented using an ECU or other semiconductor device.

The vehicle information acquiring unit 15 acquires the vehicle information 4 based on a communication protocol corresponding to the CAN (Controller Area Network) interface, LIN (Local Interconnect Network) interface, or the like, for example.

As shown in fig. 6, the vehicle information 4 is generated by information acquisition devices such as various sensors connected to the vehicle information acquisition unit 15. Fig. 6 shows examples of various information acquisition apparatuses. In addition, various information acquisition devices shown in fig. 6 can be deleted, added, or replaced with other types of devices as appropriate.

For example, the vehicle speed sensor 41 detects the speed of the vehicle 2 of fig. 1, and generates speed information as a detection result. The shift position sensor 42 detects a current gear and generates gear information as a detection result. The steering wheel steering angle sensor 43 detects the current steering wheel steering angle and generates steering wheel steering angle information as a detection result. The headlight sensor 44 detects ON/OFF of the headlight, and generates the lamp illumination information as a detection result.

The illuminance sensor 45 and the chromaticity sensor 46 detect external light, and generate external light information as a detection result. The distance measuring sensor 47 detects a distance between the vehicle 2 and an external object, and generates distance information as a detection result. The infrared sensor 48 detects the presence or absence of an object at a short distance of the vehicle 2, a distance, and the like, and generates infrared information as a detection result. The engine start sensor 49 detects ON/OFF of the engine, and generates ON/OFF information (ON/OFF information) as a detection result.

The acceleration sensor 50 and the gyro sensor 51 detect the acceleration and the angular velocity of the vehicle 2, and as a result of the detection, acceleration gyro information indicating the posture and the behavior of the vehicle 2 is generated. The temperature sensor 52 detects the temperature inside and outside the vehicle, and generates temperature information as a detection result. For example, the ambient temperature of the HUD device 1 can be detected by the temperature sensor 52. A temperature sensor may be additionally mounted in the HUD device 1.

The road-to-vehicle communication wireless transceiver 53 generates road-to-vehicle communication information by road-to-vehicle communication between the vehicle 2 and a road, a sign, a signal lamp, or the like. The wireless transceiver 54 for vehicle-to-vehicle communication generates vehicle-to-vehicle communication information by vehicle-to-vehicle communication between the vehicle 2 and other vehicles around. The in-vehicle camera 55 and the out-of-vehicle camera 56 generate in-vehicle captured image information and out-of-vehicle captured image information by capturing images of the in-vehicle and out-of-vehicle. Specifically, the in-vehicle camera 55 is, for example, a camera DMS (Driver Monitoring System) for capturing the posture, the eye position, the movement, and the like of the driver 6 in fig. 2. In this case, the fatigue state of the driver 6, the position of the line of sight, and the like can be grasped by analyzing the captured image.

On the other hand, the vehicle exterior camera 56 captures, for example, surrounding conditions such as the front and rear of the vehicle 2. In this case, by analyzing the captured image, it is possible to grasp the presence or absence of obstacles such as other vehicles and people present around, road surface conditions such as buildings, terrains, rain, snow, ice, and irregularities, and the like. The vehicle exterior camera 56 includes, for example, a vehicle recorder or the like for recording a running state by using an image.

The GPS receiver 57 generates GPS information obtained by receiving GPS signals from GPS satellites. For example, the current time, latitude, and longitude can be acquired by the GPS receiver 57. The VICS (Vehicle Information and Communication System, registered trademark) receiver 58 generates VICS information obtained by receiving a VICS signal. The GPS receiver 57, VICS receiver 58 may also be provided as part of the navigation system.

In fig. 5, the MCU16 receives such vehicle information 4 via the vehicle information acquisition unit 15. The MCU16 generates sound data for the speaker 11, video data for the video display device 35, and the like based on the vehicle information 4 and the like. The MCU16 includes a sound data generating section 27, an image data generating section 28, a distortion correcting section 29, a light source adjusting section 30, a mirror adjusting section 31, and a protection processing section 75. These portions are mainly realized by the CPU of the MCU16 reading and executing programs stored in the nonvolatile memory 17 or the volatile memory 18.

The sound data generating unit 27 generates sound data based on the vehicle information 4 and the like as necessary. The sound data is generated, for example, when the navigation system is guided by sound, when a warning is issued to the driver 6 by the AR function, or the like. The audio driver 19 drives the speaker 11 based on the audio data, and causes the speaker 11 to output audio.

The video data generating unit 28 generates video data for determining the display content of the projection video projected onto the display area 5 of fig. 2 or the like based on the vehicle information 4 or the like. The distortion correction unit 29 generates corrected image data obtained by performing distortion correction on the image data from the image data generation unit 28. Specifically, in the case where an image from the image display device 35 is projected onto the display area 5 as shown in fig. 2, the distortion correction unit 29 corrects distortion of the image due to the curvature of the windshield 3.

The display driver 20 drives each display element (pixel) included in the display panel 64 in the image display device 35 based on the corrected image data from the distortion correction unit 29. Thereby, the video display device 35 generates and displays a video for projection onto the display area 5 based on the corrected video data.

The light source adjusting unit 30 controls the brightness and the like of a light source (LED element described later) in the image display device 35. When the position of the display area 5 on the windshield 3 needs to be adjusted, the mirror adjustment unit 31 changes the installation angle of the mirror M1 by driving the driving mechanism 62 in the image display unit 12 of fig. 3.

The nonvolatile memory 17 mainly stores programs to be executed by the CPU in the MCU16, setting parameters used for processing of each part in the MCU16, predetermined audio data, video data, and the like.

The volatile memory 18 mainly stores the acquired vehicle information 4 and various data used in the processing of the respective parts in the MCU16 as appropriate. The communication unit 21 is a device equipped with a communication interface, and communicates with the outside of the HUD device 1 based on a communication protocol conforming to CAN, LIN, or the like. The communication unit 21 may be integrated with the vehicle information acquisition unit 15. The respective parts in the control device 10 of fig. 5 may be implemented by a dedicated circuit such as FPGA (Field Programmable Gate Array), as appropriate.

Next, an example of the structure of the HUD device 1 will be described with reference to fig. 7 to 10. In addition, the same descriptions as described above may be omitted. The point different from the above description is that, in the case of the HUD device 1 shown in fig. 7 to 10, the image light (outgoing light) from the image display unit 12 is emitted toward the image light reflecting surface (windshield 3) standing in front of the viewpoint of the driver of the vehicle 2.

First, a first embodiment will be described with reference to fig. 7 and 8. Fig. 7 is a schematic diagram showing a configuration example of an image display unit and the like constituting the HUD device. Fig. 8 is a diagram showing an example in which the configuration of the HUD device is changed in fig. 7.

< first embodiment >, first embodiment

In the example of fig. 7, the HUD device 1 is disposed in front of the driver and is located inside the instrument panel 11 in which the opening is formed. The front of the driver is more specifically located forward of the viewpoint of the driver or on the side where the steering wheel is located. In addition, the reflecting surface of the reflecting mirror (mirror) M1 that reflects the outgoing light 10 toward the display area is formed to face the front side of the vehicle or the traveling direction of the vehicle so that the outgoing light or the image light 10 generated in the image display device 35 and passing through the opening portion of the instrument panel 11 is outgoing toward the front of the vehicle or the traveling direction (or traveling direction) of the vehicle. In the same manner as described above, the outgoing light or the image light 10 emitted from the image display device 35 is emitted to the windshield 3 through the opening of the instrument panel 11. The outgoing light or image light 10 is reflected by the windshield 3 to the driver's viewpoint 6. Thus, the driver can observe the virtual image 9 formed based on the emitted light or the image light 10. In addition, as shown in fig. 7, since the mirror M2 is not disposed, the optical path of the image light can be shortened. Thus, the HUD device can be made smaller in volume, and can be made smaller.

Next, an example in which the configuration of fig. 7 is changed will be described with reference to fig. 8. In the example of fig. 8, the number of mirrors increases as compared with the case of fig. 7. The HUD device 1 includes a mirror M2 that guides (reflects) the outgoing light 10 to a mirror M1 of a subsequent stage in the traveling direction of the outgoing light 10. As shown in fig. 8, the mirror M1 that reflects the outgoing light 10 toward the windshield 3 is disposed above the image display device 35, that is, between the image display device 35 and the windshield 3. The reflecting surface of the reflecting mirror M1 faces the front side of the vehicle or the traveling direction of the vehicle. By adopting such a layout, the light 10 emitted from the image display device 35 can be guided upward of the image display device 35. In addition, when the optical path length of the image light in fig. 8 is the same as that of the image light in fig. 7, the mirror M2 is disposed, so that the size of the HUD device 1 in the vehicle longitudinal direction can be reduced.

In this example, a layout using 2 mirrors is shown, but the present utility model is not limited to this example. The optical layout may be changed as appropriate as long as the light 10 emitted from the image display device 35 is reflected toward the front of the vehicle or the traveling direction of the vehicle by the mirror M1 at the rear stage.

As shown in fig. 7 and 8, when the windshield or the front window is erected (erected) in front of the driver, in the arrangement shown in fig. 2 to 4, it is not easy to perform good display in the display area by reflecting the emitted light 10 on the windshield or the windshield in a state where the HUD device is housed in the instrument panel. By way of example, the configuration shown in fig. 7 and 8 can be used to provide a good display.

The glare trap 13 is a transmissive portion, is disposed in an opening of the case, and is a portion through which the image light 10 is transmitted toward the display area, and may be a curved transparent member or a planar transparent member. Fig. 7 and 8 are examples of transparent members using curved surfaces. In the first embodiment, the glare trap 13 (transmission portion) is recessed toward the image display device 35 or recessed toward the inside of the case when viewed from the outside of the instrument panel 11, and has a concave shape. When a transparent member is disposed in the opening of the instrument panel 11 so as to face the concave surface of the glare trap 13, the transparent member protrudes toward the windshield or the windshield, and becomes a convex surface. The curvature of the surface (first surface) on which the glare trap 13 is disposed and the curvature of the surface (second surface) on which the opening of the instrument panel 11 is formed are set to have the following relationship. That is, the curvature of the first face is set to form a curved face distant from the second face, and the curvature of the second face is set to form a curved face distant from the first face. That is, the curvature of the second surface is set to form a curved surface distant from the first surface, and the curvature of the first surface is set to form a curved surface distant from the second surface with respect to the second surface. By setting such curvature, the outgoing light 10 to the display region can be emitted more favorably, and favorable display can be performed.

Next, a second embodiment will be described with reference to fig. 9 and 10. Fig. 9 is a schematic diagram showing a configuration example of an image display unit and the like constituting the HUD device. Fig. 10 is a diagram showing an example of the configuration of the HUD device modified in fig. 9.

< second embodiment >

The example of fig. 9 has the same structure as the example of fig. 7, but the shape of the glare trap is different, and the glare trap 14 (transmission portion) of fig. 9 is planar. The angle between the windshield or the windshield and the planar glare trap 14 is in the range of 55 ° to 90 °. By configuring to have this relationship, the outgoing light 10 that has been sent to the display area can be emitted more favorably, and favorable display can be performed.

Next, an example in which the configuration of fig. 9 is changed will be described with reference to fig. 10. In the example of fig. 10, the HUD device 1 is configured to include the mirror M2 for guiding the emitted light 10 to the mirror M1 at the subsequent stage in the traveling direction of the emitted light 10, as in the case of fig. 8, as compared with the case of fig. 9, in which the number of mirrors is increased. The HUD device 1 shown in fig. 10 can guide the light 10 emitted from the image display device 35 upward of the image display device 35, as in the case of fig. 8. In addition, when the optical path length of the image light in fig. 10 is the same as that of the image light in fig. 9, the mirror M2 is disposed, so that the HUD device can be reduced in size in the front-rear direction of the vehicle.

The embodiments of the present utility model have been specifically described above, but the present utility model is not limited to the above-described embodiments, and various modifications may be made without departing from the scope of the present utility model. The constituent elements of the embodiment may be added, deleted, substituted, or the like in addition to the necessary constituent elements. The constituent elements may be single or plural, without particular limitation. Various configuration examples may be combined.

In the first and second embodiments, the layout (for example, the arrangement of the mirrors, the number of sheets) may be changed as appropriate as long as the outgoing light 10 can be emitted toward the front side and the outgoing light 10 can be projected on the display area. In the first and second embodiments, the image light reflection surface (specifically, the display area of the windshield 3) may be set to be 50 ° or more and 90 ° or less with respect to the horizontal plane, as an example. The HUD device 1 can perform the same display by adopting the configuration of the control system described with reference to fig. 5 and 6.

In the HUD device 1 that emits the emitted light 10 forward, the invasion of sunlight can be suppressed. Therefore, the HUD device 1 can be configured such that a polarizing filter for coping with solar light is not disposed between the display area and the image display device on the optical path of the emitted light 10, and the number of components can be reduced.

According to the technique of the present embodiment, when the front window glass is raised, it is possible to view navigation information display such as a destination and a speed projected onto the windshield glass or the like, and also view an image in which information necessary for traveling such as warning information display when a vehicle is facing or a pedestrian is detected, and it is possible to prevent a traffic accident by providing an information display device (head-up display device) that contributes to assisting safe driving. Thus, "target 3" which is a sustainable development target (SDGs: sustainable Development Goals) advocated by the united nations: good health and well-being.

Description of the reference numerals

A 1-HUD device, which comprises a first-stage light source,

3 a windscreen of the type comprising a glass,

the instrument panel of the utility model is provided with a plurality of instrument panels,

a glare-catcher for the purpose of 13,

14 glare trap.

Claims

1. A head-up display device for a vehicle, comprising:

an image display device that generates and emits image light; and

an image light projecting unit that reflects image light emitted from the image display device and projects the image light onto a display area of the vehicle,

the head-up display device is disposed in front of the driver of the vehicle, and is configured such that the image light reflected by the image light projecting unit is directed toward the front side of the vehicle.

2. The heads-up display device of claim 1, wherein:

the transmission portion disposed at an opening portion of a housing accommodating the image display device and the image light projection portion is configured to be recessed inward of the housing.

3. The heads-up display device of claim 1, wherein:

the transmission part arranged at the opening part of the shell for accommodating the image display device and the image light projection part is in a plane shape,

an angle between a windshield or a windshield of the vehicle and the planar transmissive portion is set to 55 DEG to 90 deg.

4. The heads-up display device of claim 1, wherein:

and no polarization filter is arranged between the display area and the image display device on the optical path of the image light.

5. The heads-up display device of claim 1, wherein:

the head-up display device has a first surface, a transmission part for transmitting the outgoing light from the image light projection part is arranged on the first surface,

the head-up display device is disposed inside an instrument panel of the vehicle, the instrument panel having a second surface, an opening through which the outgoing light passes being formed on the second surface,

the curvature of the second surface is set to form a curved surface distant from the first surface, and the curvature of the first surface is set to form a curved surface distant from the second surface with respect to the second surface.