WO2020130026A1

WO2020130026A1 - Head up display device and helmet

Info

Publication number: WO2020130026A1
Application number: PCT/JP2019/049569
Authority: WO
Inventors: 山田　学; 将紀平松; 航佐藤; 元樹田島; 直哉松岡; 海山浅岡
Original assignee: Ｎｓウエスト株式会社
Priority date: 2018-12-20
Filing date: 2019-12-18
Publication date: 2020-06-25

Abstract

Provided is a head up display (HUD) device (3) installed in a helmet (101), wherein: a projection unit (39) that projects display light on a combiner (73) comprises a light emitter (57) that emits the display light, a housing (61) in which is formed a projection opening (63) through which the display light emitted from the light emitter passes, and a translucent cover member (65) provided so as to cover the projection opening; the projection unit is built into a jaw part (113) of a helmet body (105) so that the display light projected on the combiner passes through an optical path part (119) provided to a mouth cover (115) of the helmet body; and the cover member is disposed more toward the inside of an interior material than a surface at which a light emitting-side end of the optical path part opens in the surface of the interior material.

Description

Head-up display device and helmet

The present disclosure relates to a head-up display device mounted on a helmet and a helmet equipped with the head-up display device.

Conventionally, by mounting a head-up display (HeadUp Display) device (hereinafter referred to as “HUD device”) on a helmet worn when driving a motorcycle, a user (driver) wearing the helmet concerned On the other hand, it is known that various kinds of information such as vehicle information such as vehicle speed, map information by a navigation system, and warning information are visually recognized as a virtual image in the front of the field of view to enhance convenience and safety during vehicle operation.

The HUD device mounted on the helmet includes a projection unit that projects display light according to the information to be displayed, and a combiner that reflects the display light projected by the projection unit toward the eyes of the user who is the wearer of the helmet. Prepare The combiner is composed of a half mirror and is arranged at a position within the front view of the user within a window opening provided in the front portion of the helmet, and transmits light from the front of the user. Therefore, the user can visually recognize the virtual image (display image) by the display light in a state of being superimposed on the landscape through the combiner. An example of such a HUD device is disclosed in Patent Document 1.

JP, 2017-030530, A

The projection unit that constitutes the HUD device includes, for example, a light emitter that emits display light and a housing that houses the light emitter. An opening that allows the display light to pass through is formed in the housing, and the opening is covered. Thus, it has a structure in which a translucent plate-shaped cover member is provided. It is desired that such a projection unit is built in the helmet in order to make the helmet equipped with the HUD device compact.

When the projection unit is built into the helmet, if the cover member is located on the outer surface of the helmet, the user can easily touch the cover member when handling the helmet, and the surface of the cover member easily gets dirty. When the surface of the cover member becomes dirty, the display light projected from the projection unit is blocked by the dirt on the surface of the cover member, so that the display image displayed by the HUD device is blurred (blurred). Therefore, the visibility of the display image that can be visually recognized by the user via the combiner deteriorates.

Also, a translucent cover plate is provided so as to cover the opening of the housing. As the cover plate, a colorless and transparent clear plate is preferably used in order to avoid dimming the display light projected from the projection unit as much as possible.

　In order to project the display light toward the combiner, such a cover plate is arranged with the surface emitting the display light facing the window opening side of the helmet. Therefore, external light entering the inside of the helmet through the window opening may enter the cover plate. The external light that has entered the cover plate is reflected on the surface thereof, or is once transmitted through the cover plate and then reflected inside the projection unit in the direction of passing through the cover plate again. At this time, since the cover plate is colorless and transparent and the surface has a relatively high light reflectance and light transmittance, the reflected external light is efficiently emitted to the user's face with a small amount of dimming. Be illuminated.

The external light that is highly efficiently projected to the user's face side is then emitted to the combiner and enters the eyes of the user wearing a helmet. When the outside light is applied to the combiner, the outer surface and the inside of the projection unit are reflected in the combiner. Further, when the outside light enters the eyes of the user, the reflection of the outside light may look dazzling. In either case, the visibility of the display image displayed by the HUD device is impaired.

Further, as a helmet for motorcycles, a transparent shield (visor) capable of covering the window opening is rotatably attached within a predetermined angle range to the helmet main body having a window opening formed in the front part. There are many products on the market that can open and close the window opening by rotating. Such a helmet shield is generally attachable/detachable to/from the helmet body, and depending on the brightness of the external environment while the motorcycle is running, it is possible to use shields with different light transmittance from the viewpoint of visibility. It can be replaced.

Helmet shields include colorless and transparent shields, colored transparent shields such as smoke shields with a light-shielding smoke color, and mirror shields that look like a mirror-like appearance. For example, a smoke shield is used in the daytime when the sunlight is strong, while a colorless and transparent shield is used in cloudy weather or at night. Smoke shield is generally called "soft smoke" or "dark smoke", but there are various kinds of smoke with different darkness. In addition, there are various types of mirror shields that have reflecting surfaces of many colors such as blue and red.

In the HUD device as described above, the combiner is arranged inside the shield, but the brightness outside the helmet is not taken into consideration without considering the change of the light-dark state of the user's field of view due to the replacement of the shield having the different light transmittance. Since the brightness of the display image viewed through the combiner is adjusted according to the above, the visibility of the display image may be deteriorated by replacing the shield.

For example, when the shield of a helmet is replaced with a shield having a relatively high light transmittance such as a colorless and transparent shield by a shield having a relatively low light transmittance such as a smoke shield, the visibility of the user becomes dark, and thus the HUD device is darkened. If the brightness of the display image that can be visually recognized by the user is set to bright eyes when using a shield having a high light transmittance, the display image may appear dazzling and hinder driving. ..

On the contrary, when the shield of the helmet is replaced with a shield having a relatively low light transmittance from a shield having a relatively high light transmittance, the field of view of the user becomes bright, so that the display image visible to the user by the HUD device is displayed. If the brightness is set to dark eyes in accordance with the shield having low light transmittance, the display image is obscured by external light and becomes difficult to see. In addition, the brightness of the display image displayed by the HUD device that is easily visible varies from user to user.

In order to achieve the above object, in the technique of the present disclosure, a projection unit is built in a helmet, and a user's hand covers a cover member provided in the projection unit so as to cover an opening through which display light of a housing passes. I placed it in a position that is hard to touch.

Specifically, the technology of the present disclosure targets a HUD device mounted on a helmet.

The HUD device according to the technology of the present disclosure is such that a user wears a helmet provided with an exterior material and an interior material and is placed in front of the user's eyes and has both light transmissivity and light reflectivity. A projection unit for projecting display light for forming a display image visually recognizable as a virtual image through the projection body is provided. The projection unit includes a light emitter that emits display light, a housing having an opening through which the display light emitted from the light emitter passes, and a translucent cover that is provided to cover the opening of the housing. And a member. The projection unit is built in the helmet so that the display light projected on the projection target through the cover member passes through a cylindrical optical path portion provided in the interior material. The cover member is arranged inside the interior material rather than the surface of the interior material on which the optical path portion is opened.

According to this configuration, the cover member of the projection unit is arranged more inward of the interior material than the surface of the interior material on which the optical path is opened. It is possible to make it hard to touch with, and it is possible to prevent dirt of the user's hand from adhering to the surface of the cover member. As a result, blurring (blurring) that occurs in the display image displayed by the HUD device can be reduced, and the visibility of the display image can be improved.

In the above HUD device, it is preferable that the cover member is a plate-like member, and the surface on the side that emits the display light is inclined toward the outside of the helmet.

　External light that has entered the inside of the helmet through the window opening provided in the helmet to provide the user with a field of view may enter the tubular optical path provided in the interior material. When the cover member is in the posture of reflecting the external light entering the tubular optical path portion toward the inside of the window opening, the external light reflected on the surface of the cover member is the eyes of the user wearing the helmet. Then, the reflection on the surface of the cover member looks dazzling, and the visibility of the display image displayed by the HUD device is impaired, and the driving may be hindered.

On the other hand, according to the above configuration, since the surface of the cover member that is a plate-shaped member that emits the display light is directed to the outside of the helmet, it is incident on the inside of the helmet and enters the cylindrical optical path portion. It is possible to prevent external light that has entered from being reflected by the surface of the cover member toward the outside of the helmet and reflected back to the eyes of the user wearing the helmet. As a result, it is possible to prevent the visibility of the display image displayed by the HUD device from being impaired and prevent the driving from being hindered.

Also, the housing may be provided in a posture in which the opening for passing the display light is directed upward. In this case, it is preferable that the optical path portion is provided above and away from the cover member, whereby the cover member is provided with a gap between the cover member and the optical path portion.

　In addition to external light that has entered the helmet, foreign matter such as dust and moisture such as rainwater may enter the cylindrical optical path provided in the interior material. In particular, when the optical path portion extends in the vertical direction, foreign matter and water that have entered the optical path portion may adhere to the cover member located below the optical path portion. However, when the cover member of the projection unit is in contact with the lower end of the cylindrical optical path portion provided in the interior material, foreign matter and rainwater that have entered the optical path portion collect on the surface of the cover member because there is no escape route. When foreign matter is deposited on the surface of the cover member, the display light projected from the projection unit is blocked so that the display image is blurred (blurred), and when the moisture adheres to the surface of the cover member in a granular form, the display projected from the projection unit. Since the light is refracted, the displayed image is distorted.

On the other hand, according to the above configuration, since a gap is provided between the cover member of the projection unit and the cylindrical optical path portion, even if foreign matter or water enters the cylindrical optical path portion through its upper end opening, It can escape to the outside from the gap between the cover member of the projection unit and the optical path portion. As a result, it is possible to prevent foreign matter and water that have entered the cylindrical optical path portion from accumulating on the surface of the cover member of the projection unit, and to reduce the amount of such foreign matter and water even if they adhere to the surface of the cover member. As a result, it is possible to reduce blurring (blurring) and distortion of the display image displayed by the HUD device, and improve the visibility of the display image.

In such a HUD device, it is preferable that a hydrophilic coating film is provided on the surface of the cover member.

The surface of the cover member of the projection unit may be fogged by the water contained in the exhaled breath of the user wearing the helmet through the cylindrical optical path. Here, when the surface of the cover member has water repellency, the water adhered to the surface easily aggregates to form fine droplets on the entire surface. When fine droplets are formed on the entire surface of the cover member, the surface of the cover member becomes white like frosted glass and scatters the display light projected from the projection unit. The image is blurred.

On the other hand, according to the above configuration, since the coating film having hydrophilicity is provided on the surface of the cover member, the breath of the user wearing the helmet hits the surface of the cover member through the optical path portion, and the moisture contained in the breath. Even if adheres to the surface of the cover member, the surface of the cover member can be made to absorb the moisture so that fine droplets are less likely to be formed on the surface of the cover member. Thereby, it is possible to reduce the blur of the display image displayed by the HUD device and further improve the visibility of the display image.

Also, the technology of the present disclosure is intended for a helmet equipped with a HUD device.

The projection unit of the HUD device included in the helmet according to the technique of the present disclosure includes a housing having an opening through which the display light emitted from the light emitting device passes, and a translucency provided so as to cover the opening of the housing. And a cover member having. A cylindrical optical path portion is provided on the side of the housing facing the opening. The projection unit is built in the helmet so that the display light projected on the projection target through the cover member passes through a cylindrical optical path portion provided in the interior material. The cover member is arranged inward of the interior material with respect to the surface of the interior material on which the end on the light emission side of the optical path portion is opened.

Further, since the opening through which the display light of the projection unit passes is covered with the cover plate having a color capable of obtaining the dimming effect, the reflectance of external light on the surface of the cover plate is low due to the dimming effect of the cover plate. In addition, the transmittance of external light in the thickness direction of the cover plate is also reduced. As a result, even if the outside light that has entered the interior through the window opening of the helmet enters the cover plate, the outside light that enters the cover plate is reflected on its surface or the cover plate is moved in the thickness direction. Since the light is dimmed when it passes through, the intensity of the external light reflected on the surface of the cover plate and the inside of the projection unit becomes weak, and it is possible to suppress the reflection on the outer surface of the projection unit and the internal projection target. The reflection of external light on the surface of the cover plate against the eyes of the user can also be reduced. Thereby, the visibility of the display image displayed by the HUD device can be improved.

In the above HUD device, the color with which the cover plate has the dimming effect may be a smoke color. The term "smoke color" as used herein refers to a dark-colored light-transmitting color such as black, gray, brown, blue, or indigo that is observing smoke.

According to this configuration, since the smoke color is adopted as the color of the cover plate, it is possible to suitably obtain the above-mentioned dimming effect on the cover plate. In addition, the display image displayed by the HUD device is displayed in a dark color so that the display image does not become overly visible when viewed in a state where it overlaps with the landscape over the projection target, and the usability of the HUD device is improved. Can be improved.

In the HUD device, the light transmittance in the thickness direction of the cover plate is preferably 50% or less.

According to this configuration, the light is transmitted through the cover plate once, and is reflected inside the projection unit in the direction in which the cover plate is transmitted again. Even if the light is reflected on the combiner, it is sufficiently darker than the display image displayed by the HUD device. Therefore, it is possible to prevent the visibility of the display image from being impaired.

Further, the technology of the present disclosure includes a helmet main body provided with a window opening for providing a wearer with a view, and a transparent shield that is replaceably attached to the helmet main body and may cover at least a part of the window opening. The target is the HUD device mounted on the equipped helmet. The term “transparent” as used herein with respect to “shield” means that it has a property of transmitting visible light (transparency), and includes not only the case of being colorless and transparent but also the case of being semitransparent. As the "transparent shield", for example, a colorless transparent shield, a colored transparent shield such as a smoke shield, or a mirror shield can be adopted.

A HUD device according to the technology of the present disclosure includes a combiner arranged inside a shield, a light emitter that emits display light projected on the combiner, and a control unit that controls generation of display light by the light emitter. Equipped with. Then, the control unit cooperates with an operation device that receives an operation for adjusting the brightness of the display image visible as a virtual image through the combiner by the user wearing the helmet by projecting the display light on the combiner, and displaying the display. The light emitting device is caused to generate display light so that the image has the brightness adjusted by the operation of the operation device.

According to this configuration, the control unit cooperates with the operation device that receives an operation for adjusting the brightness of the display image displayed by the HUD device, and the display image is formed with the brightness adjusted by the operation of the operation device. The display light is generated by the light emitter so that the image displayed by the user can be changed according to the light transmittance of the shield attached to the helmet and used depending on the user's sense of visibility. The brightness of can be manually adjusted to a level where it can be easily visually recognized. Accordingly, it is possible to prevent the visibility of the display image displayed by the HUD device from being deteriorated due to the replacement of the shield of the helmet.

The HUD device may further include an external light sensor that detects the brightness of external light inside the shield. In this case, the control unit preferably causes the light emitter to generate the display light so as to adjust the brightness of the display image according to the brightness of the external light detected by the external light sensor.

According to this configuration, the outside light sensor detects the brightness of outside light in the same space as the user's visual environment inside the shield, and the brightness of the display image depends on the detected outside light inside the shield. Since the brightness is adjusted, the brightness of the display image displayed by the HUD device is once adjusted to a brightness that is easily visible to the user by operating the operation device, and the brightness of the outside of the helmet changes. Accordingly, it can be automatically adjusted, and can be maintained in a state where it is easy to visually recognize the light and dark states of the user's field of vision.

The external light sensor is preferably provided at an upper position in the up-down direction of the peripheral edge portion of the window opening of the helmet body in a posture of detecting the brightness of external light incident through the window opening.

If the helmet equipped with the HUD device is one in which the shield is attached to the helmet body in a vertically rotatable manner within a predetermined angle range and the window opening can be opened and closed by the rotating operation of the shield, high humidity or rain will occur. When it is raining, if the shield is lowered to completely close the window opening, moisture may be accumulated in the helmet and the user may feel uncomfortable. Therefore, in order to protect the eyes of the user and to ventilate the inside of the helmet, the user should use the HUD device in a state where the shield is half-open so that the lower side of the window opening is opened and the upper side is partially covered. Can be.

When the HUD device is used with the helmet shield half-opened as described above, if the external light sensor is provided in a posture to detect the brightness of external light incident through the window opening, the external light sensor Depending on the position where the external light sensor is provided, such as the position of is the lower position in the up-down direction at the peripheral portion of the window opening of the helmet body, the open part of the window opening (the half-opened shield Since the brightness of the outside light outside the helmet is detected from (between the periphery of the window opening), the outside light sensor cannot detect the brightness of the outside light in the same space as the visual environment of the user inside the shield.

On the other hand, according to the above configuration, since the external light sensor is provided at the upper position in the vertical direction at the peripheral edge portion of the window opening of the helmet body, even when the helmet shield is in the half-opened state, The light receiving side of the external light sensor (the side facing the light receiving section for taking in external light) can be covered by the shield. Thereby, even when the HUD device is used with the shield half-opened, the brightness of outside light in the same space as the visual environment of the user inside the shield can be detected by the outside light sensor.

In addition, the outside light sensor is provided at a position at or near the center in the left-right direction of the peripheral portion of the helmet body window opening in a posture that detects the brightness of the outside light incident through the window opening. Is preferred.

If the external light sensor is installed in a posture that detects the brightness of external light entering through the window opening, the position of the external light sensor is the left end position or the right end position in the left-right direction at the peripheral portion of the window opening of the helmet body. Depending on the position where the external light sensor is installed, the direction in which the external light sensor faces (the direction in which the light receiving part that receives the external light faces) is at a relatively small angle with respect to the curved part on the side of the shield. Because of the intersecting relationship, external light incident on the shield from a direction other than the front surface of the external light sensor can be relatively largely refracted at the curved portion of the shield and can be received by the external light sensor. As described above, the amount of light received by the external light sensor is easily affected by the curved surface shape of the shield, and there is concern that the external light sensor may detect the brightness of external light that is different from the visual environment of the user even inside the shield. It

On the other hand, according to the above configuration, the external light sensor is provided at the center of the peripheral portion of the window opening of the helmet body in the left-right direction or at a position near the center. The direction in which the light receiving part that receives the light intersects with the shield at a relatively large angle, and external light that enters the shield from directions other than the front of the external light sensor is refracted at the curved portion of the shield It is possible to prevent light from being received by the sensor. Therefore, the amount of light received by the external light sensor is unlikely to be affected by the curved surface shape of the shield, and the external light sensor can detect the brightness of external light equivalent to the visual environment of the user inside the shield.

Further, the technology of the present disclosure includes a helmet main body provided with a window opening for providing a wearer with a view, and a transparent shield that is replaceably attached to the helmet main body and may cover at least a part of the window opening. A helmet equipped with a HUD device that displays visual information to a user wearing the helmet body.

In the helmet according to the technique of the present disclosure, the HUD device controls a combiner arranged inside the shield, a light emitter that emits display light projected on the combiner, and generation of display light by the light emitter. And a control unit. Then, the control unit cooperates with an operation device that receives an operation for adjusting the brightness of the display image visible as a virtual image through the combiner by the user wearing the helmet by projecting the display light on the combiner, and displaying the display. The light emitting device is caused to generate display light so that the image has the brightness adjusted by the operation of the operation device.

According to the HUD device and the helmet according to the technology of the present disclosure, it is possible to reduce the blurring (bleeding) of the display image that the user can visually recognize as a virtual image through the projection target, and improve the visibility of the display image.

FIG. 1 is a schematic overall configuration diagram of an information presentation system according to an embodiment. FIG. 2 is a schematic block diagram of the information presentation system according to the embodiment. FIG. 3 is a front view of a helmet equipped with the HUD device according to the embodiment. FIG. 4 is a cross-sectional view of a helmet equipped with the HUD device according to the embodiment. FIG. 5 is a perspective view showing a main part of a helmet equipped with the HUD device according to the embodiment. FIG. 6 is a cross-sectional view of a cover member used in the HUD device according to the embodiment. FIG. 7 is a cross-sectional view showing a main part of a helmet equipped with the HUD device according to the embodiment. FIG. 8 is a cross-sectional view of the cover member according to the first modification. FIG. 9 is a cross-sectional view of the cover member according to the second modification. FIG. 10 is a diagram showing an example of a screen for setting the brightness of the HUD display displayed on the information terminal according to the embodiment. FIG. 11 is a side view showing a state in which the shield of the helmet equipped with the HUD device according to the embodiment is half-opened. FIG. 12 is a graph of the values stored in the lookup table array. FIG. 13 is a front view of a helmet equipped with a HUD device according to a modification. FIG. 14 is a front view of a helmet equipped with a HUD device according to a modification. FIG. 15 is a front view of a helmet equipped with a HUD device according to a modification. FIG. 16: is a figure which shows an example of the screen which sets the brightness of HUD display displayed on the information terminal which concerns on a modification.

Hereinafter, exemplary embodiments will be described in detail with reference to the drawings. In the following embodiments, for convenience, a helmet and a HUD device mounted on the helmet are referred to as "upper" and "lower" in the direction corresponding to the upper and lower sides of the face of the user wearing the helmet, respectively. The front side in the direction corresponding to the front and back of the face of the user wearing the helmet is referred to as "front", and the rear side is referred to as the "rear", in the direction corresponding to the left and right of the face of the user wearing the helmet. The left side is called "left" and the right side is called "right".

<Configuration of information presentation system>
FIG. 1 is a schematic overall configuration diagram of an information presentation system 1 according to this embodiment. FIG. 2 is a schematic block diagram of the information presentation system 1. Note that, in FIG. 1, the two-dot chain line arrow indicates the path and traveling direction of the display light. The information presentation system 1 is a system that presents information that contributes to driving assistance to a rider (user) of a motorcycle, and as shown in FIGS. 1 and 2, a HUD mounted on a helmet 101 of the motorcycle. The device 3 and the information terminal 5 that provides various information that can be displayed to the HUD device 3 are provided.

-Information terminal configuration-
As the information terminal 5, a small multifunctional mobile phone called a smartphone is used. The information terminal 5 includes a GPS (Global Positioning System) receiver 7 that receives radio waves from GPS satellites to generate positioning information, a wireless communication module 9 that performs wireless communication with the outside, and the operation of the information terminal 5. A microcomputer 11 that comprehensively controls the display device, a display device 13 with a touch panel as an input/output device, and a power supply 15 that supplies electric power required to operate the information terminal 5.

The GPS receiver 7 is configured with a GPS antenna and the like (not shown). The GPS antenna receives GPS signals transmitted from a plurality of GPS satellites S launched into the earth's orbit. The GPS receiver 7 acquires information on the current position (for example, latitude, longitude, and altitude) of the information terminal 5 based on the GPS signal received by the GPS antenna. In response to a request from the microcomputer 11, the GPS receiver 7 saves the position information of the information terminal 5 that has been positioned in the memory 21 included in the microcomputer 11 and sequentially updates it.

The wireless communication module 9 includes a network communication unit 17 that communicates with an external network N that is a wide area communication network such as the Internet, and a short-range communication unit 19 that performs wireless communication with the HUD device 3 at a short distance.

The network communication unit 17 has a wireless LAN (Local Area Network) function such as WiFi (Wireless Fidelity; registered trademark) and a mobile communication standard communication function such as LTE (Long Time Evolution; registered trademark). In response to a request from the microcomputer 11, the network communication unit 17 receives map information from the external network N, road information regarding construction, traffic jam, etc., information on peripheral facilities based on the current position acquired by the GPS receiver 7, Net information such as disaster information is received and temporarily stored in the memory 21 included in the microcomputer 11.

The short-range communication unit 19 has a communication function based on a short-range wireless communication standard such as Bluetooth (registered trademark). The short-distance communication unit 19 responds to a request from the microcomputer 11 such as position information of the information terminal 5 acquired by the GPS receiver 7, net information acquired by the network communication unit 17, and various applications described later. Various information including application information acquired by software (hereinafter referred to as “application”), display items regarding display images displayed by the HUD device 3, and display setting information such as brightness is read from the memory 21 and wirelessly read. It is transmitted to the HUD device 3 by communication.

The microcomputer 11 includes a memory 21 and a CPU (Central Processing Unit) 23. The memory 21 temporarily or permanently stores various information including a program for operating the information terminal 5. The memory 21 is typically realized by a combination of a RAM (Random Access Memory) and a ROM (Read Only Memory). Various programs stored in the memory 21 include a mobile OS (Operating System) and a plurality of applications that operate on the mobile OS to realize a specific function.

The plurality of applications include a time application 25, a speed application 27, a navigation application (hereinafter referred to as “navi application”) 29, and a cooperation application 31. The plurality of

applications

27, 29, 31 are pre-installed in the information terminal 5 and stored in the memory 21.

The time application 25 is software that acquires the current time. In the time application 25, for example, based on the time stamp acquired by communication with the base station or the time information acquired by the GPS receiver 7, further, NITZ (Network Identity and Time Zone) or NTP (Network Time Protocol). The current time is acquired using such time synchronization technology.

The speed application 27 is software that detects the moving speed of the information terminal 5. The speed application 27 detects the moving speed of the information terminal 5 based on the position information of the information terminal 5 acquired by the GPS receiver 7, for example.

The navigation application 29 is software that guides the route to the destination set by the user. In the navigation application 29, for example, the destination is based on the map information acquired by the network communication unit 17 or previously stored in the memory 21 and the position information of the information terminal 5 acquired by the GPS receiver 7. Route guidance to.

The cooperation application 31 is software that cooperates with the HUD device 3 using wireless communication by the short-range communication unit 19 and transmits various information such as application information, net information, and display setting information on the HUD device 3 to the HUD device 3. Is.

The display of the HUD device 3 can be set with this cooperation application 31. Specifically, as display settings, items to be displayed on the HUD device 3 are set from a plurality of items including the current time, moving speed, and route guidance information (navigation information), and display images displayed by the HUD device 3 are set. You can set the brightness. The display setting information set by the cooperation application 31 is stored in the memory 21.

CPU 23 is typically realized by an IC (Integrated Circuit), an LSI (Large Scale Integration), an ASIC (Application Specific Integration Circuit), or the like. The CPU 23 performs calculations for processing various data, and controls the operation of the wireless communication module 9 and the display device 13 with a touch panel and the execution of

various applications

25, 27, 29, 31.

The microcomputer 11 causes the GPS receiver 7 to acquire information on the current position by the function of the CPU 23, causes the network communication unit 17 to establish a connection with the external network N, collects net information, and executes the cooperative application 31. By this, the short-range communication unit 19 is caused to establish a connection with the HUD device 3, and application information, net information, and display setting information acquired by various processes according to the execution of other

various applications

25, 27, 29 are displayed. It is transmitted to the HUD device 3.

The display device with a touch panel 13 is an electronic device in which a display device that displays an image on the screen 33 of the information terminal 5 and a touch panel that detects a position (touched position) in the screen 33 touched by the user are integrated. Thus, it has both an image output function and a user operation input function. In the information terminal 5, it is possible to perform

various applications

25, 27, 29, 31 by the touch operation on the display device 13 with a touch panel, and to perform the display setting on the HUD device 3 when the cooperative application 31 is executed. It has become.

The power supply 15 is composed of a secondary battery such as a lithium-ion battery. The power supply 15 is electrically connected to the wireless communication module 9, the microcomputer 11, and the display device with a touch panel 13 via wiring. When the information terminal 5 is turned on by a power switch (not shown), power is supplied from the power source 15 to the wireless communication module 9, the microcomputer 11 and the display device 13 with a touch panel, and the information terminal 5 is predetermined according to the user's operation. It is designed to work.

The information terminal 5 also serves as an operation device that receives an operation for setting display on the HUD device 3. In the information terminal 5, in view of the visibility of the HUD display, it corresponds to the replacement with the shield 107 having different light transmittance, and the individual difference in brightness of the HUD display that the user feels easy to see. As one of the display settings, as described above, the cooperative application 31 allows the user to manually set the brightness of the HUD display.

FIG. 10 is a diagram showing an example of a screen 33 for setting the brightness of the HUD display displayed on the information terminal 5. In this embodiment, the brightness of the HUD display set by the cooperation application 31 is divided into five levels of first to fifth levels. As the screen 33 for setting the brightness of the HUD display, a screen having a layout that presents choices 33a of brightness levels of first to fifth stages as illustrated in FIG. 10 can be adopted. The five brightness levels are the first brightness level, the second brightness level, the third brightness level, the fourth brightness level, and the fifth brightness level, which are brighter in this order. The brightness level is the brightest level, and the fifth brightness level is the darkest level.

On the screen 33 for setting the brightness of the HUD display, the options 33a of the first to fifth brightness levels are presented in order from the top. The brightness level option 33a includes, for example, an icon 33b indicating the degree of brightness, a description 33c regarding the recommended light transmittance of the shield 107, and a selection field 33d for the brightness level arranged side by side as one set. It is an item. In the linked application 31, on such a setting screen 33, the brightness of the HUD display can be increased by the user selecting one selection field 33d from the enumerated five brightness level options 33a by touch operation. Is set. Note that FIG. 10 illustrates an example in which the first brightness level option 33a is selected.

-HUD device configuration-
FIG. 3 is a front view of the helmet 101 on which the HUD device 3 is mounted. FIG. 4 is a sectional view of the helmet 101 on which the HUD device 3 is mounted. FIG. 5 is a perspective view showing a main part of the helmet 101 on which the HUD device 3 is mounted. FIG. 6 is a cross-sectional view of the cover member 65 used in the HUD device 3. FIG. 7 is a cross-sectional view showing a main part of the helmet 101 on which the HUD device 3 is mounted.

Note that, in FIGS. 3 and 4, the double-dashed line arrow indicates the path and the traveling direction of the display light as in FIG. Further, in FIG. 4, the liner 111 in the jaw 113 of the helmet body 105 is not shown for convenience. Further, in FIG. 5, a part of the shell 109, the shield 107, and the liner 111 of the helmet 101 is shown by a chain double-dashed line, and the constituent members of these helmets 101 are shown transparently.

The HUD device 3 is a projection type display device that projects visual information in the visual field of the user wearing the helmet 101. As shown in FIGS. 1 to 4, the HUD device 3 includes a wireless communication module 35 that performs wireless communication with the outside, a control unit 37 that controls a display operation of the HUD device 3, and a display light. And a projection unit 39 for projecting, a combiner unit 41 for allowing a user to visually recognize a display image by the display light projected from the projection unit 39 as a virtual image, and an operation unit for inputting an operation by the user to the HUD device 3 concerned. 43 and a power supply 45 that supplies electric power required to operate the HUD device 3. Further, as shown in FIG. 3, the HUD device 3 includes an external light sensor 3a used for automatically adjusting the brightness of the display image according to the external environment.

The helmet 101 in which the HUD device 3 according to this embodiment is mounted is a full-face type helmet, and a helmet body 105 having a window opening 103 formed in the front portion for providing the wearing user with a view, A transparent shield 107 that is replaceably attached to the helmet body 105 and that can open and close the window opening 103 is provided.

As shown in FIGS. 3 to 5, the helmet main body 105 includes a shell 109 (also referred to as a cap body) that forms an outer shell thereof, a liner 111 that is entirely provided inside the shell 109, and a helmet main body 105. The mouse cover 115 provided inside the liner 111 in the jaw 113 is provided. The shell 109 is made of ABS (Acrylonitrile Butadiene Styrene) resin, FRP (Fiber Reinforced Plastics), or the like, and plays a role of dispersing impact energy from the outside. This shell 109 is an exterior material. The liner 111 is made of expanded polystyrene or the like and functions as a buffer that absorbs impact energy. The mouse cover 115 is made of ABS resin, FRP, or the like, and serves to hold and protect the liner 111 and to give the upper surface of the jaw 113 of the helmet body 105 a design. The liner 111 and the mouse cover 115 are members disposed inside the exterior material, and the liner 111 and the mouse cover 115 constitute the interior material A.

The shield 107 is rotatably attached to the left and right sides of the window opening 103 of the helmet body 105 (shell 109) using fasteners 117 or the like within a predetermined angle range, and opens and closes the window opening 103 by rotating in the vertical direction. .. The shield 107 is made of a translucent resin such as polycarbonate.

The shield 107 has a function of blocking foreign matter such as dust, wind, and ultraviolet rays that jump into the helmet body 105 through the window opening 103 with the window opening 103 closed. The shield 107 can be removed by removing the fastener 117, and the light transmittance of a colorless transparent shield, a colored transparent shield such as a smoke shield, or a mirror shield differs depending on the brightness of the external environment. It can be replaced with various shields.

The wireless communication module 35 has a communication function based on a short-range wireless communication standard such as Bluetooth. The wireless communication module 35 receives the net information, application information, and display setting information transmitted from the short-range communication section 19 of the information terminal 5 in response to a request from the microcomputer 53 provided in the control unit 37. , In the memory 49 included in the microcomputer 53. The wireless communication module 35 is provided on the PCB together with the control unit 37, and is incorporated as a PCB module 47 on the left side of the jaw 113 of the helmet body 105.

The outside light sensor 3a is a so-called illuminance sensor, and has a light receiving element such as a photodiode that generates a photocurrent according to the brightness of the outside light in the light receiving portion 3b that receives the outside light, and is incident on the light receiving element. The brightness of the external light is detected by converting the external light into an electric current. The external light sensor 3a is electrically connected to the microcomputer 53, and outputs the detected brightness of external light to the CPU 51 included in the microcomputer 53.

The external light sensor 3a is arranged on the helmet body 105 so as to be located inside the shield 107 in the closed state. Specifically, the external light sensor 3a is in a posture that detects the brightness of external light that enters through the window opening 103, that is, in a posture that the light receiving unit 3b faces the window opening 103 side, and the window opening of the helmet main body 105. It is provided at the center or near the center in the left-right direction of the lower surface of the upper forehead part 101a in the vertical direction of the peripheral edge portion of 103.

As shown in FIG. 11, the shield 107 of the helmet 101 equipped with the HUD device 3 can be opened halfway. When the humidity is high or it is raining, if the shield 107 is lowered and the window opening 103 is completely closed, moisture may be trapped in the helmet 101 and it may feel uncomfortable. In order to ventilate the inside of the helmet 101 while protecting it, the shield 107 may be made half-open so as to open the lower side of the window opening 103 and partially cover the upper side, and the HUD device 3 can be used in that state. possible.

In the HUD device 3, since the external light sensor 3a is provided at the upper position in the vertical direction at the peripheral portion of the window opening 103 of the helmet body 105, the shield 107 of the helmet 101 is in the half-opened state as described above. Sometimes, the light receiving side of the external light sensor 3a (the side facing the light receiving section 3b) is covered with the shield 107. Thereby, even when the HUD device 3 is used with the shield 107 in the half-opened state, the brightness of outside light in the same space as the user's visual environment is detected by the outside light sensor 3a inside the shield 107. Therefore, it is possible to preferably automatically adjust the brightness of the display image based on the brightness of the external light detected by the external light sensor 3a.

The control unit 37 controls the generation of display light by the light emitter 57 provided in the projection unit 39. The control unit 37 has a microcomputer 53 including a memory 49 and a CPU 51, and a GDC (Graphics Display Controller) 55 which is an integrated circuit in charge of processing related to image display.

The memory 49 temporarily or permanently stores various information including a program for operating the HUD device 3. The memory 49 also stores net information, application information, and display setting information received by the wireless communication module 35. The memory 49 is typically realized by a combination of RAM and ROM.

The memory 49 stores a look-up table 66 (shown in FIG. 12) indicating the relationship between the brightness of the external light inside the shield 107 detected by the external light sensor 3a and the intensity of the display light forming the display image. There is.

FIG. 12 is a graph showing the values stored in the array of the lookup table 66. The lookup table 66 stores values for adjusting the intensity of the display light according to the brightness of the external light inside the shield 107 detected by the external light sensor 3a, as shown in the graph of FIG. It is a data structure with an array. In the array of the look-up table 66, the value indicating the intensity of the display light is associated with the value indicating the brightness of the external light inside the shield 107 detected by the external light sensor 3a, and the value outside the shield 107 is displayed. The brighter the light, the stronger the display light, and the darker the external light inside the shield 107, the weaker the display light is defined for each brightness level of the HUD display set in the information terminal 5.

The CPU 51 is typically realized by an IC, LSI, ASIC, or the like. The CPU 51 performs calculations for processing various data and controls the operations of the wireless communication module 35, the projection unit 39 and the GDC 55.

The GDC 55 generates display image data to be visually recognized by the user via the combiner 73 included in the combiner unit 41, based on the net information, application information, and display setting information stored in the memory 49. The display image data generated by the GDC 55 is image data representing the information of the item set in the display setting of the cooperative application 31 of the information terminal 5. The microcomputer 53 causes the GDC 55 to generate display image data by the function of the CPU 51, and outputs the image signal to the light emitter 57 included in the projection unit 39.

At this time, the CPU 51, based on the brightness level of the HUD display set by the information terminal 5 and the brightness of the external light inside the shield 107 detected by the external light sensor 3a, is stored in the memory 49 as a lookup table 66. With reference to, the intensity of the display light is determined according to the brightness of the external light in the shield 107, and the information on the determined intensity of the display light is output to the light emitter 57 together with the image data of the display image. .. Then, the control unit 37 adjusts the display image visually recognized by the user according to the brightness of the external light inside the shield detected by the external light sensor 3a at the brightness level set by the information terminal 5. The light emitting device 57 is caused to generate the display light so that the display light has the given brightness.

The projection unit 39 is built in on the right side of the jaw 113 of the helmet body 105. This projection unit 39 generates a display light having a pattern corresponding to a display image based on an image signal input from the GDC 55 and emits the light, and a display unit emitted from the light emitter 57. A concave mirror 59 that reflects toward 41, a housing 61 that accommodates the light emitter 57 and the concave mirror 59, and a cover member 65 that is provided to cover the projection opening 63 formed in the housing 61. There is.

The housing 61 is provided at a position from the right rear side to the right front side of the jaw 113 of the helmet body 105 with the projection opening 63 facing upward. The housing 61 is configured by combining a plurality of resin-made housing constituent members (not shown), and a housing space for housing the light emitter 57 and the concave mirror 59 is provided inside. The projection opening 63 is an opening for allowing the display light emitted from the light emitter 57 to pass from the inside (housing space) of the housing 61 to the outside, and has a substantially rectangular shape on the upper surface of the front portion of the housing 61. Has been formed.

The light emitting device 57 is housed in a portion from the middle of the housing 61 to the rear position on the side opposite to the projection opening 63. Although not shown, the light emitter 57 includes a display element including a light source such as an LED (Light Emitting Diode) and a reflective display panel such as an LCOS (Liquid Crystal On Silicon), an optical lens such as a convex lens or a concave lens, and a diffusion plate. , TIR (Total Internal Reflection) prism. The light emitting device 57 generates display light having a light intensity such that a display image displayed by the HUD device 3 has a brightness level set by the information terminal 5, and directs the generated display light to the concave mirror 59. And emit.

The concave mirror 59 is housed in a position corresponding to the front side of the housing 61 and below the projection opening 63. The concave mirror 59 has a free-curved reflective surface 67 having no rotational symmetry, and is provided with the reflective surface 67 facing the projection opening 63 side. The concave mirror 59 reflects the display light received from the light emitting device 57 upward toward the projection opening 63 by the reflecting surface 67, and the display image visually recognized by the user is a size suitable for display during driving. And position it.

In the projection unit 39, the display light emitted from the light emitter 57 and reflected by the concave mirror 59 passes through the projection opening 63, and is projected onto the combiner 79 included in the combiner unit 41 via the cover member 65. The cover member 65 is a substantially rectangular plate-shaped member, has translucency, and transmits display light. As shown in FIG. 6, the cover member 65 includes a base material 69 made of polycarbonate (PC) or the like, and a coating film 71 provided on the surface of the base material 69. The coating film 71 is made of silicate (xM ^I ₂ O·ySiO ₂ ) or the like and has hydrophilicity. That is, the surface of the cover member 65 is rendered hydrophilic by the coating film 71.

In the projection unit 39, the projection part 73 in which the projection opening 63 of the housing 61 is covered with the cover member 65 is arranged inside the jaw 113 of the helmet body 105 and outside the mouse cover 115. The mouse cover 115 has a curved shape that follows the shape of the jaw 113 of the helmet body 105. A cylindrical optical path portion 119 is integrally provided on the right side of the mouse cover 115 in such a manner as to bulge forward. The optical path portion 119 is a part of the mouse cover 115. The optical path portion 119 is located on the side of the housing 61 that constitutes the projection unit 39 facing the projection opening 63.

The cylinder center axis X of the optical path portion 119 extends in the vertical direction, and therefore the optical path portion 119 extends in the vertical direction. The lower end opening of the optical path portion 119 is a light incident port on which the display light from the projection unit 39 is incident. The light incident port of the optical path portion 119 faces the cover member 65 of the projection unit 39 in a state of being separated upward by a predetermined distance. Therefore, the light entrance of the optical path section 119 faces the projection opening 63 of the projection unit 39 via the cover member 65. Further, the optical path portion 119 is provided apart from the cover member 65 upward, and a gap 77 is formed between an end portion of the optical path portion 119 on the light entrance side and the upper surface of the cover member 65. The size of the gap 77 will be described later. On the other hand, the upper end opening of the optical path portion 119 is an end portion on the light emission side from which the display light from the projection unit 39 is emitted and serves as a light emission opening. The light exit port of the optical path portion 119 is opened on the surface of the mouse cover 115 located above. That is, the surface of the optical path portion 119 on which the light emission port is opened is the surface located above the mouse cover 115 (the upper surface of the mouse cover 115). The light emission port of the optical path portion 119 opens toward the combiner 79 included in the combiner unit 41. Further, the upper and lower openings of the optical path portion 119 are not closed by other members and are open. A liner 111 is provided on the outer side of the mouse cover 115 so as to surround a portion of the projection unit 39 corresponding to above the projection portion 73 and the optical path portion 119.

In this way, the projection unit 39 is built in the chin 113 of the helmet body 105 so that the display light projected on the combiner 79 via the cover member 65 passes through the optical path 119. The cover member 65, which constitutes the projection part of the projection unit 39, is arranged inward of the interior material A rather than the surface (upper surface) on the surface of the mouse cover 115 where the light exit side end of the optical path portion 119 is open. ing. That is, when viewed from above, the cover member 65 is positioned toward the back of the interior material A, so that when the jaw 113 is held when handling the helmet 101, it is difficult for a finger to touch the cover member 65. .. In particular, in this embodiment, since the optical path portion 119 has a tubular shape and is arranged above the cover member 65, in order to touch the cover member 65, a finger must be intentionally inserted into the optical path portion 119. Of course, this also makes it difficult for the user to touch the cover member 65 with a finger or hand when handling the helmet 101.

The cover member 65 is inclined in the direction in which the surface on the side that emits the display light is directed to the outside of the helmet body 105. Specifically, the cover member 65 is provided in an inclined posture in which the surface thereof is inclined forward so as to form an obtuse angle to the front side with respect to the cylinder center axis X of the optical path portion 119. As a result, the helmet 101 is worn by reflecting the external light that has entered the inside of the helmet 101 and entered the optical path portion 119 toward the back side of the shell 109 that constitutes the jaw 113 on the surface of the cover member 65. Reflection on the eyes E of the user is suppressed.

Such an inclined posture of the cover member 65 prevents the external light from being reflected back to the user's eye E by the surface of the cover member 65, so that the end surface on the side that emits the display light is incident on the inside of the helmet 101. It is preferable that the optical path unit 119 has an obtuse angle with respect to the incident direction of external light that can reach the cover member 65. For example, the angle α formed by the surface of the cover member 65 and the cylinder center axis X of the optical path portion 119 on the front side is an angle of 100 degrees or more and 125 degrees or less.

The cover member 65 is arranged at a position where a gap 77 is formed between it and the optical path portion 119 in the vertical direction in which the projection unit 39 projects the display light. The gap 77 is provided corresponding to the entire circumference of the lower end of the optical path portion 119. As a result, even if foreign matter such as dust or water such as rainwater enters the optical path portion 119 through its upper end opening, it can escape to the outside from the gap 77 between the cover member 65 of the projection unit 39 and the optical path portion 119. It is like this. The size D of the gap 77, that is, the distance between the surface of the cover member 65 and the lower end of the optical path portion 119 is, for example, 1 mm or more and 5 mm or less. At least a part of the gap 77 may be set to such a size D.

The combiner unit 41 supports the combiner 79 that receives the display light reflected by the concave mirror 59 from below and reflects it in a direction visible to the user, and positions the combiner 79 in front of the eyes of the user wearing the helmet 101. And a support mechanism 81.

The combiner 79 is a transparent or semi-transparent plate-like component, and has a free-form semi-transmissive reflection surface 83 (planar shape in the drawing) having no rotational symmetry. The combiner 79 is arranged so as to be located inside the shield 107 in the closed state. The combiner 79 is a projected object having both light transmissivity and light reflectivity, and is composed of a half mirror. The half mirror has a property of reflecting a part of incident light and transmitting a part thereof. An antireflection film called an AR (Anti Reflection) coat made of magnesium fluoride (MgF ₂ ) or the like is provided on the back surface of the combiner 79.

The support mechanism 81 supports the combiner 79 at a position within the front view of the user within the window opening 103 provided in the front portion of the helmet body 105. The combiner 79 is disposed in front of the right eye E of the user, and the support mechanism 81 causes the semi-transmissive reflection surface 83 to be disposed on the face side of the user, with the rear end located above and the front end located below. Supported in a forward leaning position.

The support mechanism 81 has a stay 85 extending vertically. The upper part of the stay 85 is held by a holder (not shown) built in the forehead part 121 of the helmet body 105. A combiner 79 is connected to the lower end of the stay 85 via a rotary shaft 87 extending in the left-right direction. The support mechanism 81 is capable of adjusting the orientation of the semi-transmissive reflection surface 83 by rotating the combiner 79 around the rotation axis 87.

The operation unit 43 is provided at a location corresponding to the PCB module 47 of the helmet body 105. Although not shown, the operation unit 43 includes a power switch and an operation switch. The power switch is a push button type switch having a function of switching on and off (turning on and off) the power of the HUD device 3. The operation switch is a push button type switch having a function of switching on and off the display of the HUD device 3.

The power supply 45 is built in the back of the helmet body 105. The power source 45 is composed of a secondary battery such as a lithium ion battery. The power source 45 is electrically connected to the wireless communication module 35, the control unit 37, and the light emitting device 57 via wiring. When the HUD device 3 is turned on by the power switch in the operation unit 43, power is supplied from the power source 45 to the wireless communication module 35, the control unit 37, and the light emitter 57, and the operation switch is operated. The display operation is performed according to the switching of the display on and off.

<Operation of information presentation system>
In the information presentation system 1 having the above configuration, when the HUD device 3 is turned on and the cooperative application 31 is executed by the information terminal 5, the HUD device 3 receives net information, application information, and display setting information. .. Then, based on the received net information and application information, the display image data corresponding to the preset item included in the display setting information is generated by the GDC 55. At this time, when the display of the HUD device 3 is in the ON state, the display light corresponding to the data of the display image generated by the GDC 55 is displayed by the light emitter 57 of the projection unit 39 as the display image set by the information terminal 5. Is generated with the light intensity corresponding to the brightness level of. The display light is emitted from the light emitting device 57, is then reflected by the concave mirror 59, is projected from the projection unit 39 to the combiner 73, and is further reflected by the combiner 73 so as to be in the field of view of the user. As a result, the user can visually recognize the display image by the display light as a virtual image in a state of being superimposed on the scenery in the front view through the combiner 73.

According to the HUD device 3 according to this embodiment and the helmet 101 in which the HUD device 3 is mounted, the cover member 65 of the projection unit 39 is removed from the surface of the jaw 113 of the helmet body 105 in the vertical direction in which the projection unit 39 projects the display light. Since the liner 111 provided inside the jaw 113 is arranged at a position recessed from the outer surface, the cover member 65 can be made hard to touch by the user when the user handles the helmet 101, and the user can easily touch the cover member 65. It is possible to prevent the stains on the hands from being attached to the surface of the cover member 65. Thereby, blurring (blurring) that occurs in the display image displayed by the HUD device 3 can be reduced, and the visibility of the display image can be improved.

Further, according to the HUD device 3 and the helmet 101 mounted with the HUD device 3 according to this embodiment, the cover member 65 that is a plate-shaped member is inclined in a direction in which the surface on the side that emits the display light is directed to the outside of the helmet 101. Therefore, as shown by the alternate long and short dash line in FIG. 4, the external light that has entered the helmet 101 and entered the optical path portion 119 is reflected on the back surface of the shell 109 that constitutes the jaw 113 on the surface of the cover member 65. It is possible to prevent the light from being reflected toward the eyes E of the user wearing the helmet 101. As a result, it is possible to prevent the visibility of the display image displayed by the HUD device 3 from being impaired and to prevent the driving from being hindered.

Further, according to the HUD device 3 according to this embodiment and the helmet 101 equipped with the same, the cover member 65 of the projection unit 39 is provided with a gap 77 between the cover member 65 and the optical path portion 119 provided on the helmet 101. Therefore, as shown in FIG. 7, when the shield 107 is raised and the window opening 103 is opened, even if water 201 such as rainwater enters the optical path portion 119 through the upper end opening, the cover of the projection unit 39 is covered. It can escape to the outside from the gap 77 between the member 65 and the optical path portion 119.

Further, not only the moisture 201 but also foreign matter such as dust that has entered the optical path portion 119 through the upper end opening thereof can be released to the outside from the gap 77 between the cover member 65 and the optical path portion 119. As a result, it is possible to prevent the moisture 201 and the foreign matter that have entered the optical path portion 119 from accumulating on the surface of the cover member 65 of the projection unit 39, and even if the moisture 201 and the foreign matter adhere to the surface of the cover member 65, the adhesion amount can be reduced. it can. As a result, blurring (blurring) and distortion of the display image displayed by the HUD device 3 can be reduced, and the visibility of the display image can be improved.

Further, according to the HUD device 3 according to this embodiment and the helmet 101 equipped with the HUD device 3, since the coating film 71 having hydrophilicity is provided on the surface of the cover member 65, the breath of the user wearing the helmet 101 may be suppressed. Even if the moisture contained in the exhaled breath hits the surface of the cover member 65 through the optical path portion 119 and adheres to the surface of the cover member 65, the moisture 301 is made to adapt to the surface of the cover member 65 as shown by the chain double-dashed line in FIG. Therefore, it is possible to make it difficult for fine droplets to be formed on the surface of the cover member 65. Thereby, it is possible to reduce the blur of the display image displayed by the HUD device 3 and improve the visibility of the display image.

As described above, the preferred embodiment has been described as an example of the technology of the present disclosure. However, the technique of the present disclosure is not limited to this, and is also applicable to the embodiment in which changes, replacements, additions, omissions, etc. are appropriately made. Further, the constituent elements described in the accompanying drawings and the detailed description may include constituent elements that are not essential for solving the problems. Therefore, those non-essential components should not be immediately recognized as being essential, because the non-essential components are described in the accompanying drawings or the detailed description.

For example, the following embodiment may have the following configurations.

In the above-described embodiment, the external light sensor 3a is provided at the center or near the center in the left-right direction on the lower surface of the upper forehead portion 101a in the vertical direction of the peripheral portion of the window opening 103 of the helmet body 105. The technology of the present disclosure is not limited to this. Examples of positions where the external light sensor 3a can be provided in the helmet 101 on which the HUD device 3 is mounted are shown in the front views of the helmet 101 in FIGS. 13 to 14.

As shown in FIG. 13, the external light sensor 3a is provided at the center or in the vicinity of the center in the left-right direction on the upper surface of the lower jaw 113 in the vertical direction of the peripheral portion of the window opening 103 of the helmet body 105. May be. Further, as shown in FIG. 14, the external light sensor 3a may be provided at a position on the upper side in the up-down direction of the left side portion in the left-right direction of the peripheral portion of the window opening 103 of the helmet body 105. Further, as shown in FIG. 15, the outside light sensor 3a may be provided at a position on the upper side in the vertical direction of the right side portion in the left and right direction of the peripheral portion of the window opening 103 of the helmet body 105.

In the above embodiment, the brightness of the HUD display is set by the user selecting one of the five brightness level options 33a listed on the setting screen 33 of the information terminal 5. The technique of the present disclosure is not limited to this. FIG. 16 shows an example of the screen 33 for setting the brightness of the HUD display displayed on the information terminal 5.

The brightness of the HUD display is, for example, as shown in FIG. 16, a bar 33e having a brightness level, an icon 33f showing an image of brightness arranged on both left and right sides of the bar 33e, and a slide operation along the bar 33e. The setting screen 33 displaying the possible sliders 33g may be continuously adjustable in a stepless manner. The user can adjust the brightness of the HUD display by sliding the slider 33g left and right by a touch operation. In addition, as the screen 33 for setting the brightness of the HUD display displayed on the information terminal 5, any screen can be adopted.

In the above-described embodiment, the HUD device 3 has been described by exemplifying the configuration of projecting the display light from the projection unit 39 to the combiner 79 provided as a projection target separately from the shield 107 of the helmet 101. The disclosed technology is not limited to this. The HUD device 3 uses the shield 107 of the helmet 101 as a projection target instead of the combiner 79, and projects display light from the projection unit 39 onto the shield 107, thereby superimposing the display light on the landscape of the front view through the shield 107. In the state, the display image by the display light may be displayed as a virtual image.

In the above-described embodiment, the gap 77 between the cover member 65 of the projection unit 39 and the optical path portion 119 is provided so as to correspond to the entire circumference of the lower end of the optical path portion 119, but the technique of the present disclosure is not limited to this. Absent. The gap 77 may be provided only in a part of the portion corresponding to the lower side of the optical path portion 119, such as being provided only in the portion corresponding to the front side of the lower end of the optical path portion 119.

In the above embodiment, a smartphone is illustrated as the information terminal 5 that cooperates with the HUD device 3, but the technology of the present disclosure is not limited to this. The information terminal 5 may be a terminal having a function similar to a smart phone such as a smart watch, a tablet terminal, or a PDA (Personal Data Assistant), and has a function of connecting to the external network N and a GPS receiver 7, Any other portable information terminal may be used as long as it can communicate with the device 3. Further, the HUD device 3 communicates with the motorcycle instead of the information terminal 5 or in addition to the information terminal 5, and receives detection information from various sensors mounted on the motorcycle to form a display image. May be.

In the above-described embodiment, a reflective display panel such as LCOS (Liquid Crystal On Silicon) is illustrated as the display element used for the light emitter 57, but the technology of the present disclosure is not limited to this. As the display element of the light emitter 57, for example, a self-luminous display element such as an organic EL (Electro Luminescence) display panel or a VFD (Vacuum Fluorescent Display) may be used.

In the above embodiment, the projection unit 39 has the concave mirror 59, but the technology of the present disclosure is not limited to this. The projection unit 39 may have a convex mirror or a plane mirror instead of the concave mirror 59.

In the above embodiment, the information presented as a display image to the user by the HUD device 3 is the current time, speed, and route guidance information, but the technique of the present disclosure is not limited to this. The information on the current time, speed, and route guidance is only an example of information that can be presented by the HUD device 3, and may be information other than those that contribute to driving of the motorcycle, and the cooperation application 31 of the information terminal 5 may be used. Other information useful for the user, such as information about peripheral facilities in the traveling area, may be set as an item to be displayed on the HUD device 3.

In the above embodiment, the full-face type helmet was described as an example of the helmet 101 on which the HUD device 3 is mounted, but the technology of the present disclosure is not limited to this. The full-face type helmet 101 is only an example of the helmet 101 on which the HUD device 3 is mounted, and any open face type (jet type) or semi-jet type may be used as long as it has a part that can accommodate a projection unit. It is possible to employ any type of helmet such as (three quarters type) as the helmet 101 on which the HUD device 3 is mounted.

In the above embodiment, the helmet 101 equipped with the HUD device 3 has been described by taking the helmet 101 worn when driving a motorcycle as an example, but the technique of the present disclosure is not limited to this. The HUD device 3 can of course be applied to a motorcycle such as a water bike or a bicycle, or a helmet worn in other vehicles such as a snowmobile.

As in Modification 1 shown in FIG. 8, the cover plate 65 is configured by attaching a smoke film 71, which is a semitransparent dark resin film, to the surface of a colorless and transparent base material 69. The base material 69 and the smoke film 71 are made of, for example, polycarbonate (PC) or methyl polymetallate (PMMA) resin, and the smoke film 71 is made of a dark-colored material. Further, the cover plate 65 may be composed of a single resin plate 73 made of a dark colored material, as in the second modification shown in FIG. Since the cover plate 65 has the smoke color in this way, it is possible to obtain a dimming effect of lowering the light transmittance in the thickness direction as compared with the case of being colorless and transparent.

The light transmittance in the thickness direction of the cover plate 65 is 5% or more and 50% or less. The light transmittance of the cover plate 65 is a value of total light transmittance measured according to JIS K 7361-1 (or JIS K 7375:2008), and is, for example, manufactured by Murakami Color Research Laboratory Co., Ltd. It is possible to measure using a measuring device (high-speed integrating sphere type spectral transmittance measuring device model: DOT-41).

The light transmittance of the cover plate 65 is set in the above range because the user can display the display image displayed by the HUD device 3 when the light transmittance of the cover plate 65 in the thickness direction is less than 5%. When the amount of power of the power source consumed by the light emitting device 57 is increased to make the brightness easily visible and the light transmittance of the cover plate 65 in the thickness direction exceeds 50%, the light is transmitted through the cover plate 65 once. This is because the light reflected in the direction of passing through the cover plate 65 again inside the projection unit 39 may be reflected in the combiner, and the visibility of the display image displayed by the HUD device 3 may be impaired.

As described above, the technology of the present disclosure is useful for a HUD device mounted on a helmet and a helmet equipped with the HUD device.

A... Interior material D... Gap size E... User's eye N... External network S... GPS satellite X... Cylinder center axis of optical path 1... Information presentation system 3... HUD device 5... Information terminal 7... GPS receiver 9 ... wireless communication module 11 ... microcomputer 13 ... display device with touch panel 15 ... power supply 17 ... network communication unit 19 ... short-range communication unit 21 ... memory 23 ... CPU
25... Time application 27... Speed application 29... Navigation application 31... Linkage application 33... Screen 35... Wireless communication module 37... Control unit 39... Projection unit 41... Combiner unit 43... Operation unit 45... Power supply 47... PCB module 49... Memory 51... CPU
53... Microcomputer 55... GDC
57... Light emitting device 59... Concave surface mirror 61... Housing 63... Projection opening 65... Cover member 67... Reflecting surface 69... Base material 71... Coating film 73... Projection site 77... Gap 79... Combiner (projected object)
81... Support mechanism 83... Semi-transmissive reflective surface 85... Stay 87... Rotating shaft 101... Helmet 103... Window opening 105... Helmet body 107... Shield 109... Shell (exterior material)
111... Liner 113... Jaw 115... Mouse cover 117... Fastener 119... Optical path 121...

Forehead

201, 301... Moisture

Claims

A head-up display device mounted on a helmet including an exterior material and an interior material,
Display light for forming a display image visible to the user as a virtual image through the projection target, with respect to the projection target having both light transmissivity and light reflectivity arranged in front of the user wearing the helmet. Equipped with a projection unit for projecting
The projection unit includes a light emitter that emits display light, a housing that has an opening that allows the display light emitted from the light emitter to pass through, and a light-transmitting member that is provided to cover the opening of the housing. A cover member having a property,
The projection unit is built in the helmet so that the display light projected onto the projection target through the cover member is passed through a cylindrical optical path portion provided in the interior material,
The head-up display device, wherein the cover member is arranged inside the interior material rather than a surface of the interior material on which a light emitting side end of the optical path portion is opened.
The head-up display device according to claim 1,
The head-up display device, wherein the cover member is a plate-like member, and a surface of the cover member that emits display light is inclined in a direction toward the outside of the helmet.
The head-up display device according to claim 1,
The housing is provided with the opening facing upwards,
The head-up display device, wherein the optical path portion is provided so as to be apart from the cover member upward and extend in the vertical direction.
The head-up display device according to claim 3,
A head-up display device, wherein a hydrophilic coating film is provided on the surface of the cover member.
A helmet equipped with an exterior material and an interior material, and equipped with a head-up display device,
The head-up display device is a display image that can be visually recognized by the user as a virtual image through the projection target, with respect to the projection target that is disposed in front of the eyes of the user wearing the helmet and has both light transmittance and light reflectivity. A projection unit for projecting display light for forming
The projection unit includes a light emitter that emits display light, a housing that has an opening that allows the display light emitted from the light emitter to pass through, and a light-transmitting member that is provided to cover the opening of the housing. A cover member having a property,
A cylindrical optical path portion is provided on a side of the housing facing the opening,
The projection unit is built in the helmet so that the display light projected onto the projection target through the cover member is passed through a cylindrical optical path portion provided in the interior material,
The said cover member is arrange|positioned inward of the said interior material rather than the surface in which the edge part by the side of the said optical path part on the light-emission side in the surface of the said interior material was opened.
A head-up display device mounted on a helmet,
Display light for forming a display image visually recognizable as a virtual image by the user through the projection target, which is located in front of the user wearing the helmet and has both light transmittance and light reflectivity. Equipped with a projection unit to project,
The projection unit includes a light emitter that emits display light, a housing that has an opening that allows the display light emitted from the light emitter to pass through, and a light-transmitting member that is provided to cover the opening of the housing. And a cover plate having
The head-up display device according to claim 1, wherein the cover plate has a color capable of obtaining a dimming effect that makes the light transmittance in the thickness direction lower than that in the case of being colorless and transparent.
The head-up display device according to claim 6,
The head-up display device according to claim 1, wherein the cover plate has a smoke reduction color.
The head-up display device according to claim 6,
The head-up display device, wherein the cover plate has a light transmittance of 50% or less in the thickness direction.
A helmet equipped with a head-up display device,
The head-up display device is a display image that is visible to the user as a virtual image through the projection target, with respect to the projection target having both light transmissivity and light reflectivity located in front of the user wearing the helmet. A projection unit for projecting display light for forming is provided,
The projection unit includes a light emitter that emits display light, a housing that has an opening that allows the display light emitted from the light emitter to pass through, and a light-transmitting member that is provided to cover the opening of the housing. And a cover plate having
The helmet according to claim 1, wherein the cover plate has a color that provides a light-reducing effect that lowers the light transmittance in the thickness direction as compared with the case of being colorless and transparent.
Mounted on a helmet including a helmet body provided with a window opening for providing a wearer with a view and a transparent shield that is replaceably attached to the helmet body and can cover at least a part of the window opening. Head-up display device,
A combiner arranged inside the shield,
A light emitter for emitting display light projected on the combiner,
A control unit for controlling the generation of display light in the light emitter,
The control unit cooperates with an operation device that receives an operation for adjusting the brightness of a display image visible as a virtual image through the combiner by a user wearing the helmet by projecting display light on the combiner. A head-up display device, wherein the light emitting device generates display light so that the display image has a brightness adjusted by an operation of the operation device.
A helmet body provided with a window opening for providing a wearer with a view,
A transparent shield that is replaceably attached to the helmet body and that can cover at least a portion of the window opening;
A helmet equipped with a head-up display device for displaying visual information to a user wearing the helmet body,
The head-up display device includes a combiner disposed inside the shield, a light emitter that emits display light projected on the combiner, and a control unit that controls generation of the display light by the light emitter. ,,
The control unit cooperates with an operation device that receives an operation for adjusting the brightness of a display image visible as a virtual image through the combiner by a user wearing the helmet by projecting display light on the combiner. A helmet for causing the light emitting device to generate display light so that the display image has a brightness adjusted by an operation of the operation device.