Full-face mask, display control method, and program

Abstract

To provide a full face type mask that avoids an optical element for performing information display from contacting an external obstacle and can be manufactured easily at low cost.SOLUTION: A full face type mask 1 comprises: a front transparent body 11 that is arranged at a portion corresponding to a portion covering at least both eyes of a wearer; a frame part 12 that covers the periphery of the front transparent body; and a video projection device 20 for the single eye. The video projection device 20 has, on an inner surface side of the front transparent body 11, a display element 21, a lens part 22 that transmits emission light from the display element, and a projection unit 23 that has a beam splitter 24 and a concave mirror 25. The projection unit 23 is disposed to make emission light from the lens part 22 incident on the beam splitter 24 through a space on the inner surface side of the front transparent body 11, transmit the light through the beam splitter, and cause the light to be reflected on the concave mirror 25, and cause the beam splitter 24 to reflect the reflected light from the concave mirror 25 toward the signal eye of the wearer.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a full-face type mask, a display control method, and a program. [Background technology]

[0002] Head Mounted Displays (HMDs), which are worn by the wearer on the head, are now on the market.

[0003] Patent Document 1 describes a compact, reattachable display device for eyewear having a head-mounted frame, the device comprising a housing assembly, a circuit configuration, an electronic imaging assembly, and an optical element. The housing assembly has a mounting mechanism movably mounted to the temple of the frame that is received on the head of the eyewear. The circuit configuration is housed in the housing assembly and receives a data signal or a video signal. The electronic imaging assembly is supported by the housing assembly and communicates with the circuit configuration housed in the housing assembly to create an image. The optical element comprises a transparent mount that supports an eyepiece assembly in front of the user's eye, the mount being capable of receiving an image from the electronic imaging assembly and relaying the image internally. The optical element comprises an eyepiece assembly that is supported by the transparent mount and allows the image to enter the user's eye.

[0004] Patent Document 2 describes a head-mounted image display system including a support frame with a headset arranged to be supported by a user's head, and a display assembly supported by the support frame in front of the user's eyes. The display assembly includes a display element, an optical relay, an optical path, and an eyepiece assembly. The display element operates to provide an image separated from ambient light. The optical relay has two optical surfaces arranged to pass ambient light through the two optical surfaces toward the user's eyes. The optical path is an optical path arranged within the optical relay to receive light from the display element, having at least a portion along and between the two optical surfaces of the optical relay. The eyepiece assembly includes an interface arranged within the optical relay and arranged to transfer light that has passed along at least a portion of the optical path to the user's eye outside the optical path.

[0005] The '2006 patent describes that the optical device can be used in full face mask systems such as diver's masks, firefighter face shields, astronaut suit masks, face masks for hazardous materials body suits, etc. The '2006 patent also describes mounting the display and circuitry on the eyeglasses, and for diving masks, the circuitry and display can be mounted directly in the face mask, around its edge. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 2001-522064 [Patent Document 2] Special Publication No. 2002-539498 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the device described in Patent Document 1 is a display device for eyewear having a head-mounted frame. Therefore, when the device described in Patent Document 1 is attached to a face mask-type mask that covers the wearer's face, such as a gas mask, the optical elements are provided on the outside of the mask, and the displayed information is shifted from the field of view due to contact with an obstacle, etc., so it is difficult to say that it can always be reliably viewed. In fact, when wearing a face mask-type mask, it is difficult to grasp the sense of distance and contact with obstacles is more frequent than when not wearing a face mask, so this problem is a challenge to be solved. Note that the device described in Patent Document 1 can be worn inside the face mask-type mask together with eyewear, but it becomes a double equipment.

[0008] In addition, the head mounted image display system described in Patent Document 2 is a system in which the light between the display and the beam splitter passes through an optical relay, so the size of the optical system including the optical relay becomes large. Therefore, if a full-face type mask system is adopted in the system described in Patent Document 2, the structure of the front transparent body of the mask becomes complex and thick, and it is not a structure that can be manufactured using existing face masks, so the manufacturing time and cost will increase.

[0009] In view of the above-mentioned problems, an object of the present disclosure is to provide a full-face mask, a display control method, and a program that can be easily and inexpensively manufactured and that can prevent the optical elements for displaying information from coming into contact with external obstacles. [Means for solving the problem]

[0010] A full-face mask according to a first aspect of the present disclosure includes a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device. The image projection device includes a display element, a lens portion that passes light emitted from the display element, and a projection unit having a beam splitter and a concave mirror on the inner surface side of the front transparent body. The projection unit is arranged so that light emitted from the lens portion enters the beam splitter through a space on the inner surface side of the front transparent body, passes through the beam splitter, and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter to the one eye side of the wearer.

[0011] A display control method according to a second aspect of the present disclosure is a display control method for a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device. The image projection device has, on the inner surface side of the front transparent body, a display element, a lens portion that passes light emitted from the display element, a projection unit having a beam splitter and a concave mirror, and an angle adjustment mechanism that adjusts the reflection angle of the beam splitter. The projection unit is arranged so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, transmitted through the beam splitter and reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter to one eye side of the wearer. In the display control method, the image projection device changes the display brightness of the display element according to the reflection angle adjusted by the angle adjustment mechanism.

[0012] A display control method according to a third aspect of the present disclosure is a display control method for a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device. The image projection device has a display element, a focus adjustment lens that passes light emitted from the display element, and a projection unit having a beam splitter and a concave mirror on the inner surface side of the front transparent body. The image projection device has an external housing on the outer surface side of the front transparent body, in which a distance measuring device that measures a distance to an obstacle is provided. The projection unit is arranged so that light emitted from the focus adjustment lens is incident on the beam splitter through a space on the inner surface side of the front transparent body, transmitted through the beam splitter and reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter to one eye side of the wearer. In the display control method, the ranging device measures the distance to an obstacle, and the focus adjustment lens adjusts the focus on the beam splitter, which serves as the display surface, so that the image to be displayed is viewed at the distance measured by the ranging device.

[0013] A program according to a fourth aspect of the present disclosure is a program for causing a control computer provided in a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device to execute the program on the control computer provided in the image projection device. The image projection device has, on the inner surface side of the front transparent body, a display element, a lens portion that passes light emitted from the display element, a projection unit having a beam splitter and a concave mirror, and an angle adjustment mechanism that adjusts the reflection angle of the beam splitter. The projection unit is arranged so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, transmitted through the beam splitter and reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter to the one eye side of the wearer. The program causes the control computer to execute a process of changing the display brightness of the display element according to the reflection angle adjusted by the angle adjustment mechanism.

[0014] A program according to a fifth aspect of the present disclosure is a program for causing a control computer provided in a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device to execute the program on the control computer provided in the image projection device. The image projection device has a display element, a focus adjustment lens that passes light emitted from the display element, and a projection unit having a beam splitter and a concave mirror on the inner surface side of the front transparent body. The image projection device has an external housing provided with a distance measuring device that measures the distance to an obstacle on the outer surface side of the front transparent body. The projection unit is arranged so that light emitted from the focus adjustment lens is incident on the beam splitter through a space on the inner surface side of the front transparent body, transmitted through the beam splitter and reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter to one eye side of the wearer. The program causes the control computer to measure the distance to an obstacle using the ranging device, and to execute a process of adjusting the focus of the focus adjustment lens so that the image to be displayed is viewed at the distance measured by the ranging device on the beam splitter, which serves as the display surface. Effect of the Invention

[0015] The present disclosure makes it possible to provide a full-face mask, a display control method, and a program that can be manufactured easily and at low cost, and that can prevent the optical elements for displaying information from coming into contact with external obstacles. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a front view showing an example of the configuration of a full-face type mask according to a first embodiment. [Diagram 2] FIG. 1 is a side view showing an example of the configuration of a full-face type mask according to a first embodiment. [Diagram 3] FIG. 3 is a cross-sectional view showing an example of an optical path in the mask of FIGS. [Figure 4]FIG. 3 is a schematic diagram showing the field of view when a wearer wears the mask of FIGS. 1 and 2. [Diagram 5] FIG. 11 is a side view showing an example of an angle adjustment mechanism for a beam splitter in a full-face mask according to the second embodiment. [Figure 6] 6 is a schematic diagram showing an adjustment state in the angle adjustment mechanism of FIG. 5. FIG. [Figure 7] 6 is a block diagram showing an example of the configuration of a control device provided in the mask of FIG. 5. [Figure 8] FIG. 11 is a perspective view showing a state in which an example of a component part having a display function in a full-face type mask according to embodiment 3 is attached to the mask. [Figure 9] FIG. 9 is a perspective view showing how components are attached to the mask, following FIG. 8. [Figure 10] FIG. 11 is a perspective view showing an example of the configuration of a full-face type mask according to a fourth embodiment. [Figure 11] FIG. 11 is a perspective view showing some of the components of the mask of FIG. 10. [Figure 12] 11A and 11B are schematic diagrams showing an example of display control in the mask of FIG. 10. [Figure 13] FIG. 13 is a block diagram showing an example of the configuration of a worker device according to a fifth embodiment. [Figure 14] 13 is a diagram showing an example of a display image displayed on a video projection device provided in the worker device according to the fifth embodiment. FIG. [Figure 15] FIG. 13 is a front view showing an example of the configuration of a full-face type mask according to a sixth embodiment. [Figure 16] FIG. 16 is a cross-sectional view showing a cross section of a portion of the mask of FIG. 15. [Figure 17] FIG. 1 is a diagram illustrating an example of a hardware configuration of an image projection device for a full-face type mask. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment will be described with reference to the drawings. In the embodiments, the same or equivalent elements may be denoted by the same reference numerals, and duplicated descriptions will be omitted as appropriate.

[0018] <Embodiment 1> A full-face type mask according to embodiment 1 will be described with reference to Figures 1 to 4. Figure 1 is a front view showing one configuration example of a full-face type mask according to embodiment 1, and Figure 2 is a side view thereof.

[0019] As shown in Fig. 1, a full-face type mask 1 according to this embodiment (hereinafter simply referred to as "mask 1") includes a front transparent body 11 arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion 12 covering the periphery of the front transparent body 11, and an image projection device 20. Also, as shown in Fig. 1, the mask 1 can include an internal face-contact body (nose cup) 13 that covers the periphery of the mouth and nostrils of the wearer.

[0020] The mask 1 may be a full-face type, and although omitted in FIG. 1 etc., for example, a band or other attachment for fixing the mask 1 body to the head along the back of the head is provided. Alternatively, the mask 1 may be provided with a shield covering the back of the head (which also forms a full-face helmet-like shape). The full-face type mask 1 can be used as a gas mask, a dust mask, an underwater mask (a diving mask for divers), a face shield for firefighters (gas mask), a face mask for astronauts, a face mask for hazardous materials handlers, and the like. In addition, the mask 1 can be used as various other types of masks. The mask 1 is provided with an air intake and an exhaust port, and the airtightness according to the purpose is ensured, and the mask is connected to an oxygen tank or the like as necessary.

[0021] The front transparent body 11 is a transparent face body, so-called an eyepiece, and can be made of a material (e.g., polycarbonate, glass, etc.) and thickness according to the use of the mask 1, so as to maintain strength according to the use. When the above-mentioned band or other attachment is used, the frame part 12 can be provided with an elastic body or the like at a portion that is brought into close contact with the wearer's face. When the above-mentioned shield that covers the back of the head is used, the shield can be attached to the end of the frame part 12 on the back side of the head, and in this case, an elastic body or the like can also be provided to bring the shield into close contact with the wearer's face.

[0022] 1 shows an example in which the image projection device 20 is disposed for the right eye, but it can also be disposed for the left eye. The mask 1 includes the image projection device 20 capable of displaying information, and therefore can be called a mask with an HMD (Head Mounted Display) or a smart mask.

[0023] The image projection device 20 has, on the inner surface side of the front transparent body 11 (i.e., inside the mask 1), a display element 21, a lens section 22 that passes light emitted from the display element 21, and a projection unit 23 having a beam splitter 24 and a concave mirror 25.

[0024] The display element 21 may be an organic EL (electro-luminescence) element, a liquid crystal element, or the like, and a single image may be displayed by a plurality of display elements. When the display element 21 is a non-self-luminous element such as a liquid crystal element, a backlight is provided behind it. Although not shown, the image projection device 20 may also have a display control unit that controls the display on the display element 21.

[0025] The lens section 22 can be composed of multiple lenses, including a relay lens that transfers an image to the projection unit 23 (that emits light emitted from the display element). By using a relay lens with a magnification of greater than 1x, the display element 21 can be made smaller.

[0026] The beam splitter 24 may be any type that reflects a part of the incident light and transmits a part of it, and may be a plate-type beam splitter as shown in the figure to achieve small size and weight reduction. However, the beam splitter 24 may be a prism type. The beam splitter 24 may be a so-called half mirror, or may be a polarizing beam splitter that can separate polarized components, in which case the light emitted from the display element 21 can be a source having a polarized component that matches it. The concave mirror 25 returns the light that has transmitted through the beam splitter 24 to the beam splitter 24.

[0027] The wearer can ensure vision for one eye (the right eye in this example) through the beam splitter 24 and the front transparent body 11, and can ensure vision for the other eye (the left eye in this example) only through the front transparent body 11.

[0028] Furthermore, the image projection device 20 can have an inner unit 26 having a display element 21 and a lens section 22, and the inner unit 26 can be fixedly connected to the outer unit 27 with the front transparent body 11 sandwiched therebetween, and such an example will be described below. The inner unit 26 is an example of an internal housing that is a housing provided on the inner surface side of the front transparent body 11 and houses the display element 21 and the lens section 22, and the display element 21 and the lens section 22 will be described below as the inner unit 26. The outer unit 27 is an example of a housing provided on the outer surface side of the front transparent body 11, and the components housed therein will be described below as the outer unit 27.

[0029] Also, one or more holes for such fixed connection may be provided in the front transparent body 11, and at least one of the inner unit 26 and the outer unit 27 may be passed through the one or more holes to be fixed to each other. In this case, they are fixed so as to maintain airtightness. However, in a configuration in which the image projection device 20 does not need to have other components such as a camera, which will be described later, outside the front transparent body 11, the outer unit 27 may not be provided. When the outer unit 27 is not provided, the inner unit 26 that houses the display element 21 and the lens unit 22 may be fixed to the frame unit 12 so as to be located inside the front transparent body 11.

[0030] Next, an example of the optical path in the mask 1 will be described with reference to Fig. 3. Fig. 3 is a cross-sectional view showing an example of the optical path in the mask 1 of Figs.

[0031] The projection unit 23 is arranged such that the beam splitter 24 and the concave mirror 25 are arranged to form an optical path as shown in FIG. 3. That is, the projection unit 23 is arranged so that the light emitted from the lens unit 22 enters the beam splitter 24 through the space on the inner surface side of the front transparent body 11, passes through the beam splitter 24, and is reflected by the concave mirror 25, and the reflected light is reflected by the beam splitter 24 toward one eye of the wearer. Here, the light emitted from the lens unit 22 can refer to the light emitted from the display element 21, which is imaged inside the lens unit 22 and emitted toward the beam splitter 24 side, as shown in FIG. 3. In this way, the projection unit 23 can be a unit of a so-called Birdbath optical system. The projection unit 23 can also be called a combiner unit.

[0032] That is, the image light emitted from the display element 21 is converted into light rays under optimal conditions by the lens section 22, passes through the beam splitter 24 of the projection unit 23, and is reflected by the concave mirror 25. The light rays reflected by the concave mirror 25 acquire the necessary magnification upon reflection, are reflected by the beam splitter 24, and enter the pupil. In addition, since the beam splitter 24 is installed in front of the pupil, light is transmitted from the pupil to the outside, and the wearer can view the outside with the eye on the side where the beam splitter 24 is installed. In other words, since the displayed image (virtual image) overlaps with the wearer's field of vision via the front transparent body 11, the wearer can view the image (virtual image) with almost no movement of the line of sight.

[0033] In this manner, in this embodiment, the concave mirror 25 and the lens section 22 that forms an image on the way can provide the magnification required for display, and the lens diameter of the lens section 22 can be reduced, enabling the optical components (display element 21, lens section 22, and projection unit 23) in the image projection device 20 to be miniaturized. This makes it possible to mount the optical components in the image projection device 20 on a mask such as the mask 1 that has little space within its surface.

[0034] As described above, the mask 1 has a space between the lens section 22 and the projection unit 23 that serves as an optical path, and this space is located on the inner surface side of the front transparent body 11 (i.e., within the faceplate of the mask 1). Therefore, in the mask 1, this space allows the wearer to ensure a downward field of vision, as indicated by the double-headed arrow in FIG.

[0035] Such a visual field as viewed from the front of the wearer will be described with reference to Fig. 4. Fig. 4 is a schematic diagram showing the visual field when the wearer wears the mask 1. As shown by the hatched area in Fig. 4, when the wearer wears the mask 1, the size of the lens unit 22 can be reduced to minimize the blocked area of ​​the field of view, so that the wearer can ensure a wide visual field. Note that Fig. 4 shows an example in which the outer unit 27 is provided with a distance measuring device 42 and an image acquisition unit 41, which is an imaging device such as a camera, but this is not essential in this embodiment and will be described later in the second and subsequent embodiments.

[0036] In particular, it is preferable that the beam splitter 24 has a transmittance of 50% or more (transparent specifications with a transmittance of 50% or more). The wearer will view the outside through the beam splitter 24, and in addition to the effect of minimizing the blocked area of ​​the field of view by making the lens unit 22 smaller, such transparent specifications can ensure a wider field of view.

[0037] As described above, in the mask 1 according to the present embodiment, the image projection device 20 is provided so that the wearer can visually recognize information, and the image projection device 20 provided in the facepiece can be made smaller (space-saving) and simplified. Since such an image projection device 20 has a simple and compact structure, it can be mounted on a mask with a small space inside the facepiece, improving the degree of freedom of mounting on the mask and enabling mounting that avoids contact of optical elements (optical components) with external obstacles. In addition, the mask 1 according to the present embodiment has a structure that can be easily manufactured to fit the size of the wearer's face by selecting from existing full-face masks of various sizes and attaching the image projection device 20 later, thereby reducing manufacturing time and costs.

[0038] Thus, according to this embodiment, it is possible to provide a full-face type mask 1 that can be manufactured easily and at low cost while preventing the optical elements for displaying information from coming into contact with external obstacles.

[0039] In addition, the image projection device 20 can have an internal housing (inner unit 26) that is a housing having a display element 21 and a lens section 22 and is provided on the inner surface side of the front transparent body 11, and the inner unit 26 can be arranged as follows.

[0040] That is, in this embodiment, as shown in Fig. 4, the inner unit 26 can be disposed at an angle (θ in Fig. 4) from the center line corresponding to the wearer's median line C in a direction that avoids the nose cup 13. By disposing the inner unit 26 at an angle from the center line so as to avoid the nose cup 13 in this way, it is possible to avoid the discomfort of the wearer due to contact with the nose cup 13 and to prevent blurring of the optical system. In addition, such an effect can also be obtained by providing a recess (groove) larger than the outer shape of the inner unit 26 (mainly the outer shape of the lens portion 22) on the outside of the nose cup 13. Of course, it is also possible to provide such a groove and angle it from the center line.

[0041] <Embodiment 2> This embodiment will be described with reference to Figures 5 to 7, mainly with respect to points not described in the first embodiment because they are not essential, and with respect to points different from the first embodiment, but the various examples described in the first embodiment can be applied. Figure 5 is a side view showing an example of an angle adjustment mechanism for a beam splitter in a full-face mask according to the second embodiment, and Figure 6 is a schematic diagram showing the state of adjustment in the angle adjustment mechanism of Figure 5.

[0042] By aligning the light beam emitted from the projection unit 23 with the pupil position, it is possible to display information suited to the wearer. For this reason, as shown in Fig. 5, the image projection device 20 in this embodiment has an angle adjustment mechanism 30 that adjusts the reflection angle of the beam splitter 24. The angle adjustment mechanism 30 may be capable of adjusting the reflection angle, but as a simple example, the beam splitter 24 is attached to a fixture 31 fixed to the frame portion 12 so that the angle of the beam splitter 24 is adjustable. For example, the angle can be changed by fixing a rotation axis 24r provided on the beam splitter 24 to the fixture 31.

[0043] As shown in Fig. 6, the fixture 31 has a plurality of angle fixing parts 32 that indicate which adjustment position the beam splitter 24 is in when it is rotated around the rotation axis 24r, and that fix the angle at that position by engaging with a protruding member or the like on the beam splitter 24 side. It is preferable that each angle fixing part 32 has a mechanism that can fix the angle of the beam splitter 24 unless it is moved with a certain degree of strength. Also, which adjustment position the beam splitter 24 is in can be visually confirmed by an angle indicating part 33 provided on the beam splitter 24 side.

[0044] Specifically, as shown in Fig. 6, by setting angle adjustment mechanism 30 to the state of angle adjustment mechanism 30a, i.e., the state of the lower limit of the adjustment value, beam splitter 24 can be disposed at the angle indicated by beam splitter 24a, and optical path a indicated by the arrow can be selected. Similarly, by setting angle adjustment mechanism 30 to the state of angle adjustment mechanism 30b, i.e., the state of the center of the adjustment value (the position indicated by angle fixing portion 32c in angle fixing portion 32), beam splitter 24 can be disposed at the angle indicated by beam splitter 24b, and optical path b indicated by the arrow can be selected. Similarly, by setting angle adjustment mechanism 30 to the state of angle adjustment mechanism 30c, i.e., the state of the upper limit of the adjustment value, beam splitter 24 can be disposed at the angle indicated by beam splitter 24c, and optical path c indicated by the arrow can be selected.

[0045] Such angle adjustment mechanism 30 can change the reflection angle of the light from the concave mirror 25 at the beam splitter 24, thereby changing the arrival position of the light in the upward or downward direction relative to the position of the pupil. In other words, the angle adjustment mechanism 30 can adjust the position at which the projected image of the image projection device 20 inside the faceplate is optimally viewed to match the position of the wearer's pupil. In other words, in this embodiment, by providing the angle adjustment mechanism 30, information can be displayed according to the position of the wearer's eyes.

[0046] As illustrated here, when the beam splitter 24 is a plate-type beam splitter that is a flat component, the wearer can easily select the optimum angle, and can easily adjust it to match the selected angle. From the viewpoint of ensuring the airtightness inside the mask 1, it is preferable that the angle adjustment mechanism 30 is a mechanism that adjusts the angle before the wearer puts on the mask 1, rather than adjusting it from the outside. Of course, the angle adjustment mechanism 30 can also be equipped with an electric mechanism that automatically adjusts according to an external command.

[0047] Furthermore, the brightness of the displayed image changes depending on the angle adjusted by the angle adjustment mechanism 30. A configuration that can deal with this will be described with reference to Fig. 7 along with other components of a control system that can be included in the image projection device 20. Fig. 7 is a block diagram showing an example of the configuration of a control device provided in the mask of Fig. 5.

[0048] 7, the control device 70 provided in the image projection device 20 can have a control unit 71, a display element 21, an image acquisition unit 41, a distance measuring device 42, a display control unit 72, a focus adjustment unit 73, an information receiving unit 74, an image transmitting unit 75, and an adjustment angle detection unit 76. Note that the distance measuring device 42 and the focus adjustment unit 73 may not be adopted in this embodiment, and will be described later as a fourth embodiment.

[0049] The control unit 71 is a part that serves as a main control unit of the control device 70, and controls the entire image projection device 20. The control unit 71 can be realized by, for example, a control computer including a CPU (Central Processing Unit), a working memory, and a non-volatile storage device that stores programs for display control, information processing control, etc. The control unit 71 can also be realized by including, for example, an integrated circuit.

[0050] The display control unit 72 is connected to the display element 21 and controls the display on the display element 21 . The information receiving unit 74 receives information to be displayed from an information processing device such as a smartphone or an external device such as a server device via wireless communication or wired communication. The information processing device such as a smartphone can be used by an administrator who gives instructions to the wearer, and the administrator can issue instructions to the wearer. The information receiving unit 74 can also receive, as information, an image of the external device managed by the administrator (e.g., an image of the administrator's face, etc.). The server device can be a computer accessible by the administrator who gives instructions to the wearer, and the administrator can issue instructions to the wearer via the server device.

[0051] The control unit 71 receives the information received by the information receiving unit 74, constructs an image to be displayed on the display element 21, and instructs the display control unit 72 to display it. Of course, the information received by the information receiving unit 74 may be the image to be displayed itself. The control unit 71 can also read information previously stored in an internal storage device, construct an image, and issue a display instruction, or read a previously stored image and issue a display instruction.

[0052] The image acquisition unit 41 is an imaging device such as at least one of an infrared camera and a visible camera, and can be disposed in the outer unit 27 so that the imaging range faces the front of the wearer wearing the mask 1. The infrared camera images the environment around the wearer based on the infrared light received by the infrared camera, and the visible camera images the environment around the wearer based on the visible light received by the visible camera. The control unit 71 can also display the image acquired by the image acquisition unit 41 on the display element 21 via the display control unit 72. However, the scenery actually seen in front of the wearer can be viewed by the wearer because the field of view is secured via the front transparent body 11 (and the beam splitter 24). Therefore, when displaying the image acquired by the image acquisition unit 41, it is preferable to display an image that cannot actually be viewed, such as an image of an infrared camera (such as an image showing a temperature distribution), on the display element 21.

[0053] Furthermore, the image transmission unit 75 transmits the image acquired by the image acquisition unit 41 or the image displayed on the beam splitter 24 to an information processing device such as the above-mentioned smartphone or a server device, thereby enabling the administrator to grasp the situation of the wearer. When transmitting the image displayed on the beam splitter 24, the image can be obtained by, for example, synthesizing the image acquired by the image acquisition unit 41 and the image to be displayed on the display element 21.

[0054] The adjustment angle detection unit 76 is a sensor provided at each of the scale positions (positions of the angle fixing units 32) of the fixture 31, detects when each scale is matched, and outputs the detection result to the control unit 71. The control unit 71 transmits this detection result to the display control unit 72, and the display control unit 72 changes the display luminance (e.g., maximum luminance or average luminance of the entire screen) of the display element 21 according to the reflection angle adjusted by the angle adjustment mechanism 30. Specifically, it is preferable to control so that the display luminance of the display element 21 is increased in accordance with the upper, middle, and lower limits of the adjustment value, that is, so that the luminance is high at the lower limit and low at the upper limit.

[0055] The positional relationship between the mask 1 and the wearer's face is determined to a specific position depending on the facial shape in order to satisfy the functions of the mask 1. On the other hand, since the image projection device 20 is fixed to the main body of the mask 1 (the front transparent body 11 and the frame part 12, etc.), a situation may occur in which the projected image does not reach the pupil due to individual differences in pupil position. However, by providing the angle adjustment mechanism 30, such a problem can be solved and the mask 1 can be set to an optimal light beam position. In addition, by making the beam splitter 24, which is the subject of the angle adjustment, a flat part, the fluctuation of the optical path length due to the adjustment can be suppressed, and the image quality of the projected image can be ensured over the entire adjustment range.

[0056] Furthermore, by providing an adjustment angle detection unit 76 and adjusting the brightness of the image according to the detected angle, it is possible to adjust the brightness of the image viewed at the adjusted angle so that it does not change. Here, an example is given in which a mechanical adjustment mechanism for manual adjustment is provided as the angle adjustment mechanism 30, but a mechanism for automatically changing the angle by control from an external operation switch or an external information processing device such as a smartphone can also be adopted. In that case, the adjustment angle detection unit 76 is not necessary, and it is sufficient to control the brightness adjustment in accordance with the change control.

[0057] As described above, among the components shown as the control device 70 in FIG. 7, the display element 21 is built in the inner unit 26, the adjustment angle detection unit 76 is provided in the projection unit 23, and the other components are built in the outer unit 27. In this configuration, the image acquired by the image acquisition unit 41 is directly transmitted from the outer unit 27 to the inner unit 26 by wire. However, the arrangement is not limited to this, and for example, even the display element 21 can be built in the outer unit 27 by arranging a mirror on the optical path between the display element 21 and the lens unit 22. Incidentally, by providing the image acquisition unit 41 and the distance measurement device 42 on the outer unit 27 side, the clarity of the image acquired and the accuracy of distance measurement can be improved by not passing through the front transparent body 11 compared to the case where they are provided on the inner unit 26 or projection unit 23 side. In addition, although the description has been given on the assumption that the inner unit 26 and the outer unit 27 are connected by wire, a configuration in which they are connected wirelessly can also be adopted.

[0058] <Embodiment 3> The present embodiment will be described with reference to Fig. 8 and Fig. 9 with respect to the differences from the second embodiment, but the various examples described in the first and second embodiments can be applied. Fig. 8 is a perspective view showing a state in which an example of a component part of a display function in a full-face type mask according to the third embodiment is attached to the mask, and Fig. 10 is a perspective view showing a state in which the component part is attached to the mask, following Fig. 8.

[0059] 1 and the like, the image projection device 20 can be composed of three units, as shown in Fig. 8, which is an exploded view of the components of the display function of the mask 1 (i.e., the image projection device 20) as seen from the inside. That is, the image projection device 20 can be composed of three units: a projection unit (combiner unit) 23, an inner unit 26 including a lens section 22 and a display element 21, and an outer unit 27 including an image acquisition section 41 on the outside of the facepiece and other control boards, etc.

[0060] Furthermore, in this embodiment, the inner unit 26 and the outer unit 27 are firmly fixed to each other with the front transparent body 11 sandwiched therebetween. The projection unit 23 is fixed using the outer unit 27, or the outer unit 27 and the frame section 12, or the outer unit 27, the frame section 12 and the front transparent body 11, or the like.

[0061] In this embodiment, the inner unit 26 and the projection unit 23 have positioning structures 26a, 23a that position them relative to each other. That is, the mounting position of the projection unit 23 is restricted by the positioning structure provided on the inner unit 26. Note that, although the positioning structures 26a, 23a are illustrated with a convex portion on the former and a recessed portion that engages with the convex portion on the latter, any shape is acceptable as long as they have shapes that enable the relative positions to be determined.

[0062] 8 and 9, when attaching the projection unit 23, the positioning structure 23a of the projection unit 23 and the positioning structure 26a of the inner unit 26 are settled into a position where they mesh with each other, and in this state the inner unit 26 and the outer unit 27 are fixed together with screws or the like. At this time, there is no need to adjust the position of the projection unit 23, and assembly can be performed by a simple butting operation.

[0063] In reality, the face, which is the front transparent body 11, is configured as a curved surface, and slight differences in the mounting positions of each unit will change the posture within the face. However, this positioning structure allows accurate positioning between the inner unit 26 and the projection unit 23, enabling normal projection. This configuration also makes it easy to manufacture the mask 1 by mounting the three units that make up the image projection device 20 after manufacturing the main body of the mask 1.

[0064] Furthermore, by configuring the inner unit 26 and the projection unit 23 as separate components in advance, it is possible to deal with the replacement of individual components. For example, if the projection unit 23 is scratched, it is sufficient to replace only the projection unit 23.

[0065] Moreover, the projection unit 23 can be composed of transparent parts, and the inner unit 26 can be composed of non-transparent parts. By configuring the projection unit 23 with transparent parts other than the beam splitter 24 (of course, excluding part of the concave mirror 25), the wearer's vision can be sufficiently ensured.

[0066] <Embodiment 4> The present embodiment will be described with reference to Figs. 7 and 10 to 12 with respect to differences from the second embodiment, but the various examples described in the first to third embodiments can be applied. Fig. 10 is a perspective view showing one configuration example of a full-face type mask according to the fourth embodiment, and Fig. 11 is a perspective view showing some of the components of the mask in Fig. 10. Fig. 12 is a schematic diagram showing an example of display control in the mask in Fig. 10. Fig. 10 corresponds to the perspective view in Fig. 1.

[0067] As shown in Figures 7, 10, and 11, the image projection device 20 in this embodiment is equipped with a distance measuring device 42 and a focus adjustment unit 73, and is configured so that the lens unit 22 has a focus adjustment lens such as a liquid lens.

[0068] The distance measuring device 42 is a device that measures the distance to an obstacle, and can be provided in the outer unit 27. The distance measuring device 42 measures the distance to an obstacle with an infrared sensor, for example, by using an infrared camera described as an example of the image acquisition unit 41, and outputs the measurement result to the control unit 71. However, any method for measuring the distance is acceptable. Note that an obstacle is an object that is visible in front of the wearer, and when the distance is equal to or exceeds a measurable threshold, a measurement result that indicates that there is no obstacle can be output by performing processing equivalent to infinity.

[0069] Upon receiving the measurement result, the control unit 71 instructs the focus adjustment unit 73 to adjust the focus of the focus adjustment lens, and the focus adjustment unit 73 executes the adjustment on the focus adjustment lens.

[0070] Here, the focus adjustment unit 73 adjusts the focus of the focus adjustment lens so that the image to be displayed is visually recognized at the distance measured by the distance measuring device 42 on the beam splitter 24, which is the display surface. For example, as shown in FIG. 12, the focus is adjusted so that when the measured distance is distance Ma, the image is projected at a projection distance Da that matches distance Ma, and when the measured distance is distance Mb, the image is projected at a projection distance Db that matches distance Mb. In this way, in this embodiment, the projection distance of the projected image is controlled by controlling the focus adjustment lens based on the measurement result (distance measurement information) of the distance measuring device 42, and the image is projected at the distance of an object present in front of the wearer (distance expression is added to the presented image). However, it is preferable to set an upper limit on the projection distance and control so as not to project the image beyond a certain distance.

[0071] In this way, by adjusting the focus so that an image (for example, a temperature distribution image obtained by an infrared sensor) is at the measured distance, the wearer can get a sense of distance even in a dark place.

[0072] In fact, when the wearer uses the mask 1 in a dark place, he or she will act relying on the image projected onto the beam splitter 24, but in a configuration without the distance measuring device 42 and the focus adjustment lens, the wearer often needs to search for an object by touch since the distance cannot be expressed. A common means for creating a sense of distance in an image is a three-dimensional representation in which an image is projected onto each of the two eyes, but it is very difficult to adjust the interpupillary distance due to a lack of mounting space and the fact that it is fixed to the facepiece side. Therefore, in this embodiment, the image projection device 20 is for a single eye, and is equipped with such a distance measuring device 42 and focus adjustment lens, thereby solving such problems and allowing the wearer to intuitively search for an object by projection for one eye while maintaining a small size. This prevents the wearer of the mask 1 from searching for an object by touch or assists such searching.

[0073] Also, although an example has been given in which focus adjustment is performed using a focus adjustment lens in the lens unit 22, a configuration that does not perform such focus adjustment can also be adopted. For example, a distance measuring device 42 is provided in the outer unit 27, and the control unit 71 causes the display control unit 72 to perform display control so that an image (for example, a temperature distribution image obtained by an infrared sensor) is included in the image to include the measured distance in numbers, colors, etc. Even with such a configuration, the wearer can get a sense of distance even in a dark place.

[0074] <Embodiment 5> The present embodiment will be described with reference to Fig. 13 and Fig. 14 in terms of differences from the second embodiment, but the various examples described in the first to fourth embodiments can be applied. Fig. 13 is a block diagram showing an example of the configuration of an operator's device according to the fifth embodiment. Fig. 14 is a diagram showing an example of a display image displayed on a video projection device provided in the operator's device according to the fifth embodiment.

[0075] In this embodiment, a worker's device will be described which is a full-face type mask 1 and which includes a cylinder and a control box carried by a worker who wears the mask 1. This worker's device includes a cylinder (not shown) and a first control device 70a and a second control device 70b shown in FIG. 13 as alternatives to the control device 70 on the image projection device 20 side. Note that, although this embodiment illustrates an example in which a worker uses a cylinder, the worker's device can also be configured without a cylinder, in which case the pressure sensor 79 and cylinder remaining amount determination unit 78 described later are not necessary.

[0076] An example of a worker who needs a cylinder is a firefighter who performs firefighting activities, but is not limited to this. For example, the worker may be a police officer, a member of the Self-Defense Forces, a rescue team member, a worker at a construction site, a worker in any facility, etc. In other words, the worker device can be carried by various workers.

[0077] Although the external shape of the control box is not shown in the drawings, it can be attached to a backpack belt for carrying the cylinder together with the cylinder. However, the control box can also be attached to a waist belt worn around the waist or a shoulder belt worn on the shoulders.

[0078] 7, the first control device 70a and the second control device 70b are provided with communication interfaces (I / F) 77a, 77b, and the second control device 70b is provided with a cylinder remaining amount determination unit 78 and a pressure sensor 79. The communication I / Fs 77a, 77b are provided in the first control device 70a and the second control device 70b, respectively, and are connected to each other by wired cables to transmit and receive information.

[0079] The components of the first control device 70a are built into any one of the projection unit 23, the inner unit 26, or the outer unit 27 in the mask 1 of Fig. 1. At least the adjustment angle detection unit 76 is provided in the projection unit 23, the display element 21 is provided in the inner unit 26, and the image acquisition unit 41 and the distance measurement device 42 are provided on the outer unit 27 side. The inner unit 26 and the outer unit 27 can be connected by wire. Also, the components of the second control device 70b are built into the above-mentioned control box.

[0080] In the first control device 70a, the display control unit 72 connected to the display element 21, the focus adjustment unit 73, the distance measurement device 42, the adjustment angle detection unit 76, and the image acquisition unit 41 are connected to the communication I / F 77a, and can be controlled by the control unit 71b of the second control device 70b. That is, for example, the image acquired by the image acquisition unit 41 of the outer unit 27 is passed to the control unit 71b on the control box side via the communication I / F 77a, the wired cable, and the communication I / F 77b, and processed by the control unit 71b, and the control of the first control device 70a is performed by the control unit 71b. In this way, the outer unit 27 and the control box can be connected by wire.

[0081] The second control device 70b includes a communication I / F 77b, a control unit 71b, an information receiving unit 74, an image transmitting unit 75, a cylinder remaining amount determining unit 78, and a pressure sensor 79. The control unit 71b receives pressure detection data from the pressure sensor 79 and controls the cylinder remaining amount determining unit 78, and performs control similar to that of the control unit 70 in FIG. 7, except that the control unit 71b performs control via the communication I / Fs 77a and 77b in part. For example, the control unit 71b of the control box generates a display image and transmits it to the outer unit 27 via a wire, and the display control unit 72 of the outer unit 27 converts it into actual display data, and then transmits it to the display element 21 in the inner unit 26 for display. In the configuration example of FIG. 13, a configuration including a control unit for controlling the entire first control device 70a can also be adopted, and in that case, this control unit may perform processing in cooperation with the control unit 71b.

[0082] The information receiving unit 74 has the function described as the information receiving unit 74 in FIG. 7. That is, the information receiving unit 74 receives information to be displayed from an external device such as an information processing device such as a smartphone or a server device by wireless communication or wired communication, and passes it to the control unit 71b. The control unit 71b receives the information received by the information receiving unit 74, constructs an image to be displayed on the display element 21, and passes it to the first control device 70a by a wired cable via the communication I / F 77b. In the first control device 70a, the display control unit 72 receives the image via the communication I / F 77a, and the display control unit 72 can display it on the display element 21. The information receiving unit 74 can also receive an image of an external device managed by an administrator or the like (for example, an image of the administrator's face) as information, and pass it to the control unit 71b. The control unit 71b can also pass the image of the external device received in this way to the display control unit 72 via the communication I / F 77b, the wired cable, and the communication I / F 77a, and the display control unit 72 can display it on the display element 21. In this way, the information received by the information receiving unit 74 becomes a display target by the inner unit 26 and the projection unit 23, and can be visually confirmed by the worker.

[0083] The pressure sensor 79 is actually provided on a cylinder carried by the operator and can be connected to the control box by a wired cable. The pressure sensor 79 detects the pressure inside the cylinder to detect the remaining amount of gas (e.g., air) in the cylinder, and outputs the detection data to the control unit 71b.

[0084] The cylinder remaining amount determination unit 78 determines whether or not the remaining amount of gas (e.g., air) in the cylinder carried by the worker who carries the worker device has fallen below a predetermined threshold. Specifically, the cylinder remaining amount determination unit 78 determines whether or not the remaining amount of gas in the cylinder specified based on the output of the pressure sensor 79 has fallen below a predetermined threshold.

[0085] This determination result can be notified to the worker as an emergency notification that the remaining amount of gas in the cylinder has fallen below a threshold. For example, in the display image 80 illustrated in FIG. 14, the words "Cylinder Remaining Amount" are displayed in the message display area 82 as information indicating the type of emergency notification. The message display area 82 can also display notifications to the worker other than the above-mentioned emergency notification of the remaining amount of the cylinder. Note that the message display area 82 can also display information transmitted from the administrator and received by the information receiving unit 74, such as "Watch out for falling objects."

[0086] In addition, the second control device 70b may include an acceleration sensor (not shown) that detects acceleration and outputs detection data to the control unit 71b in order to detect the movement of the worker carrying the worker device, and a movement determination unit that determines the movement based on the detection data. This movement determination unit determines whether the movement state of the worker carrying the worker device is a predetermined movement state or not. Here, the predetermined movement state is the movement when an abnormality occurs in the worker, and specifically, for example, a stationary state that continues for a predetermined time or more. The movement determination unit determines the movement state of the worker based on the output from a sensor such as an acceleration sensor that detects the movement of the worker. This determination result can also be displayed in the message display area 82 of the display image 80.

[0087] 14 may include not only the message display area 82 but also one or more of a captured image display area 81, a cylinder display area 83, and a device status display area 84. The captured image display area 81 is an area where an image acquired by the image acquisition unit 41 is displayed, for example, an infrared camera image. The cylinder display area 83 displays the remaining amount (pressure) of gas in the cylinder. The device status display area 84 is an area where the status of both or one of the first control device 70a and the second control device 70b is displayed, for example, the remaining battery level and the strength of the radio waves used for communication.

[0088] The display image 80 shown in Fig. 14 is merely an example, and may include an area for displaying information other than the above-mentioned information. For example, a map of the worker's activity location may be displayed. This map may be held in advance by the first control device 70a or the second control device 70b, or may be transmitted from the manager side and received by the information receiving unit 74.

[0089] The second control device 70b may further include a notification sending unit (not shown) for sending notifications indicating the results of the determination of the remaining amount of the cylinder and the results of the determination of the operating state of the worker to an external device. With this configuration, the manager can know the state of the worker, and can input necessary messages from the external device as needed and send them to the information receiving unit 74 so that they can be received.

[0090] In addition, in the present embodiment, the outer unit 27 is connected to the inner unit 26 by wires, and the control box is connected to the outer unit 27 by wires. However, other configuration examples such as the following may be adopted. That is, in the present embodiment, the outer unit 27, which includes information acquisition devices such as the image acquisition unit 41, the distance measurement device 42, and the pressure sensor 79, may be connected to the control box by wires, and the control box and the inner unit 26 may be connected by wires. The latter wire may be a cable that passes through the inside of the outer unit 27. Also, in this case, the pressure sensor 79 is provided in a cylinder carried by the worker, and may be connected to the main body of the outer unit 27 by a wired cable. In the case of such a configuration example, the connection form is different from that in FIG. 13, and the image and data acquired by the outer unit 27 may be displayed on the inner unit 26 via the control box.

[0091] In addition, in this embodiment, a configuration example in which the outer unit 27 is wired connected to the inner unit 26 and the control box is wired connected to the outer unit 27, and the other configuration example described above (an example in which the control box and the inner unit 26 are directly wired connected) have been described. However, in this embodiment, it is also possible to configure so that one or more of these wired connections are wireless connections. In addition, the connection between the pressure sensor 79 and the control box body (or the connection between the pressure sensor and the outer unit 27 body in the other configuration example described above) is not limited to being wired, and may be wireless.

[0092] In addition to the configuration without a control box as in the second embodiment, the other configuration examples including the control box described in this embodiment may also enable video transmission without going through a control box. That is, the configuration may be such that the video acquired by the video acquisition unit 41 is transmitted from the outer unit 27 to the inner unit 26 by wire or wirelessly without going through the control box.

[0093] <Embodiment 6> The present embodiment will be described with reference to Fig. 15 and Fig. 16 with respect to the differences from the first embodiment, but the various examples described in the first to fifth embodiments can be applied. Fig. 15 is a front view showing a configuration example of a full-face type mask according to the sixth embodiment, and Fig. 16 is a cross-sectional view showing a cross section of a part of the mask in Fig. 15.

[0094] As the present embodiment, a modified example of the arrangement of the inner unit 26 relative to the nose cup 13 illustrated in Fig. 4 will be described. As shown in Fig. 15, a mask 1a according to the present embodiment is obtained by changing the image projection device 20 including the inner unit 26 in the mask 1 of Fig. 4 to an image projection device 20a including an inner unit 26b.

[0095] As shown in FIG. 16, the upper lens of the inner unit 26b is parallel to the center line corresponding to the wearer's median line C without any angle, and the reflecting mirrors 22b and 22c are provided inside the lens portion 22a to avoid the nose cup 13. Here, the path of the light emitted from the upper lens of the lens portion 22a is also parallel to the center line corresponding to the median line C. Even in this configuration example, it is possible to avoid the discomfort of the wearer due to contact with the nose cup 13 and to prevent blurring of the optical system. Also, in this embodiment, a recess (groove) larger than the outer shape of the inner unit 26b (mainly the outer shape of the lens portion 22a) may be provided on the outside of the nose cup 13.

[0096] <Other embodiments, etc.> [a] In each embodiment, the functions of a full-face type mask have been described, but each mask is not limited to the examples of shape and configuration shown, and it is sufficient for each mask to realize these functions.

[0097] [b] The mask image projection device according to each embodiment may have the following hardware configuration. Fig. 17 is a diagram showing an example of the hardware configuration of a full-face mask image projection device. The same applies to the other embodiment [a].

[0098] The full-face type mask image projection device 100 shown in FIG. 17 may have a processor 101, a memory 102, and an interface 103. The processor 101 may be, for example, a microprocessor, an MPU (Micro Processor Unit), or a CPU. The processor 101 may include a plurality of processors. The memory 102 is, for example, a combination of a volatile memory and a non-volatile memory. The functions of the mask image projection device described in each embodiment are realized by the processor 101 reading and executing a program stored in the memory 102. At this time, input and output of information can be performed via an interface 103 such as a communication interface that communicates with other internal parts or other external devices. The control box (second control device 70b) in the fifth embodiment can also adopt the hardware configuration exemplified in FIG. 17. In this case, too, the processing function of the control box is realized by the processor 101 reading and executing a program stored in the memory 102. At this time, input and output of information can be performed via an interface 103 such as a communication interface that communicates with the first control device 70a or other external devices.

[0099] In the above examples, the program includes instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in the embodiments. The program may be stored in a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, the computer-readable medium or tangible storage medium includes random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technology, CD-ROM, digital versatile disc (DVD), Blu-ray® disk or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device. The program may be transmitted on a transitory computer-readable medium or communication medium. By way of example and not limitation, the transitory computer-readable medium or communication medium includes electrical, optical, acoustic, or other forms of propagated signals.

[0100] [c] Furthermore, as in the above-mentioned embodiment 2, in which the procedure of display control is exemplified, the present disclosure also includes a form as a display control method in a full-face type mask equipped with an angle adjustment mechanism. In this display control method, the image projection device changes the display brightness of the display element according to the reflection angle adjusted by the angle adjustment mechanism. Note that other examples are as described in the above-mentioned embodiments. In addition, the program in this case is a program for causing a control computer equipped in the image projection device to execute the above-mentioned change processing.

[0101] Furthermore, as in the above-mentioned fourth embodiment, in which the procedure of focus adjustment control is exemplified, the present disclosure also includes a form as a display control method in a full-face type mask equipped with a distance measuring device and a focus adjustment lens. In this display control method, the distance measuring device measures the distance to an obstacle, and the focus adjustment lens adjusts the focus on the beam splitter serving as the display surface so that the image to be displayed is viewed at the distance measured by the distance measuring device. Note that other examples are as described in the above-mentioned embodiments. In addition, the program in this case is a program for causing a control computer provided in the image projection device to execute the above-mentioned processing.

[0102] The present disclosure is not limited to the above-described embodiment, and may be modified as appropriate without departing from the spirit and scope of the present disclosure. In addition, the present disclosure may be implemented by appropriately combining the respective embodiments.

[0103] A part or all of the above-described embodiments can be described as, but is not limited to, the following supplementary notes. (Appendix 1) A front transparent body disposed in a portion corresponding to a portion covering at least both eyes of a wearer; A frame portion that covers the periphery of the front transparent body; A monocular image projection device; Equipped with the image projection device has, on the inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, and a projection unit having a beam splitter and a concave mirror; the projection unit is disposed so that light emitted from the lens unit is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer. Full face mask. (Appendix 2) The image projection device has an angle adjustment mechanism for adjusting a reflection angle of the beam splitter. A full-face mask as described in Appendix 1. (Appendix 3) The image projection device changes the display luminance of the display element in accordance with the reflection angle adjusted by the angle adjustment mechanism. A full-face mask as described in Appendix 2. (Appendix 4) The beam splitter has a transmittance of 50% or more. A full-face mask according to any one of claims 1 to 3. (Appendix 5) the image projection device includes an outer housing provided on an outer surface side of the front transparent body, and an inner housing provided on an inner surface side of the front transparent body, the inner housing being a housing having the display element and the lens unit, the internal housing and the projection unit have a positioning structure for positioning them relative to each other, The inner housing and the outer housing are fixed to each other with the front transparent body sandwiched therebetween. A full-face mask according to any one of claims 1 to 4. (Appendix 6) The projection unit is made of transparent parts, and the internal housing is made of non-transparent parts. A full-face mask as described in Appendix 5. (Appendix 7) the image projection device has an external housing provided on an outer surface side of the front transparent body, The external housing is provided with a distance measuring device that measures a distance to an obstacle, The lens unit has a focus adjustment lens, the focus adjustment lens adjusts the focus on the beam splitter, which serves as a display surface, so that the image to be displayed is viewed at the distance measured by the distance measuring device. A full-face mask according to any one of claims 1 to 6. (Appendix 8) An internal facepiece is provided that covers the wearer's mouth and nostrils, the image projection device has an inner housing that is a housing having the display element and the lens unit and is provided on the inner surface side of the front transparent body, The inner housing is disposed at an angle from a center line corresponding to the wearer's midline in a direction to avoid the inner face contact body. A full-face mask according to any one of claims 1 to 7. (Appendix 9) A display control method for a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering a periphery of the front transparent body, and a monocular image projection device, comprising: the image projection device has, on an inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, a projection unit having a beam splitter and a concave mirror, and an angle adjustment mechanism that adjusts a reflection angle of the beam splitter; the projection unit is disposed so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; The display control method further comprises: changing a display luminance of the display element in accordance with a reflection angle adjusted by the angle adjustment mechanism, the image projection device changing a display luminance of the display element in accordance with a reflection angle adjusted by the angle adjustment mechanism. Display control method. (Appendix 10) A display control method for a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering a periphery of the front transparent body, and a monocular image projection device, comprising: the image projection device has, on the inner surface side of the front transparent body, a display element, a focus adjustment lens that passes light emitted from the display element, and a projection unit having a beam splitter and a concave mirror, and has, on the outer surface side of the front transparent body, an external housing provided with a distance measuring device that measures a distance to an obstacle; the projection unit is disposed so that light emitted from the focus adjustment lens is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; The display control method includes: The distance measuring device measures a distance to an obstacle; the focus adjustment lens adjusts the focus on the beam splitter, which serves as a display surface, so that the image to be displayed is viewed at the distance measured by the distance measuring device; Display control method. (Appendix 11) A full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device, the full-face mask including a control computer and a monocular image projection device, the program being executed by the control computer, the control computer comprising: the image projection device has, on an inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, a projection unit having a beam splitter and a concave mirror, and an angle adjustment mechanism that adjusts a reflection angle of the beam splitter; the projection unit is disposed so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; the program causes the control computer to execute a process of changing the display luminance of the display element in accordance with the reflection angle adjusted by the angle adjustment mechanism. program. (Appendix 12) A full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device, the full-face mask including a control computer and a monocular image projection device, the program being executed by the control computer, the control computer comprising: the image projection device has, on the inner surface side of the front transparent body, a display element, a focus adjustment lens that passes light emitted from the display element, and a projection unit having a beam splitter and a concave mirror, and has, on the outer surface side of the front transparent body, an external housing provided with a distance measuring device that measures a distance to an obstacle; the projection unit is disposed so that light emitted from the focus adjustment lens is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; The program causes the control computer to Measure the distance to an obstacle with the distance measuring device; adjusting a focus of the focus adjustment lens so that a display target image is viewed at the distance measured by the distance measuring device on the beam splitter that serves as a display surface; Execute the process, program. [Explanation of symbols]

[0104] 1, 1a Full-face mask 11 Front transparent body 12 Frame section 13 Nose cup 20, 100 Video projection equipment 21 Display element 22, 22a Lens section 22b, 22c Folding mirror 23 Projection Unit 23a Positioning mechanism 24 Beam splitter 24r Rotation axis 25 concave mirror 26, 26b Inner unit 26a Positioning mechanism 27 Outer unit 30 Angle adjustment mechanism 31 Fixtures 32 Angle fixing part 33 Angle indicator 41 Video Acquisition Unit 42 Ranging Devices 70 Control device 70a First control device 70b Second control device 71, 71b Control section 72 Display control section 73 Focus adjustment section 74, 74b Information receiving section 75 Video transmission unit 76 Adjustment angle detection unit 77a, 77b Communication I / F 78 Cylinder remaining amount determination unit 79 Pressure Sensor 80 Display images 81 Captured image display area 82 Message display area 83 Cylinder display area 84 Device status display area 101 Processor 102 Memory 103 Interface

Claims

1. A front transparent body disposed in a portion corresponding to a portion covering at least both eyes of a wearer; A frame portion that covers the periphery of the front transparent body; A monocular image projection device; Equipped with the image projection device has, on the inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, and a projection unit having a beam splitter and a concave mirror; the projection unit is disposed so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; the image projection device has an angle adjustment mechanism for adjusting a reflection angle of the beam splitter, and changes the display luminance of the display element in accordance with the reflection angle adjusted by the angle adjustment mechanism. Full face mask.

2. A front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer; A frame portion that covers the periphery of the front transparent body; A monocular image projection device; Equipped with the image projection device has, on the inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, and a projection unit having a beam splitter and a concave mirror; the projection unit is disposed so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; the image projection device includes an outer housing provided on an outer surface side of the front transparent body, and an inner housing provided on an inner surface side of the front transparent body, the inner housing being a housing having the display element and the lens unit, the internal housing and the projection unit have a positioning structure for positioning them relative to each other, The inner housing and the outer housing are fixed to each other with the front transparent body sandwiched therebetween. Full face mask.

3. The projection unit is made of transparent parts, and the internal housing is made of non-transparent parts.

3. The full-face mask according to claim 2.

4. The beam splitter has a transmittance of 50% or more. A full-face type mask according to any one of claims 1 to 3.

5. the image projection device has an external housing provided on an outer surface side of the front transparent body, The external housing is provided with a distance measuring device that measures a distance to an obstacle, The lens unit has a focus adjustment lens, the focus adjustment lens adjusts the focus on the beam splitter, which serves as a display surface, so that the image to be displayed is viewed at the distance measured by the distance measuring device. The full-face mask according to any one of claims 1 to 4.

6. An internal facepiece is provided that covers the wearer's mouth and nostrils, the image projection device has an inner housing that is a housing having the display element and the lens unit and is provided on the inner surface side of the front transparent body, The inner housing is disposed at an angle from a center line corresponding to the wearer's midline in a direction to avoid the inner face contact body. A full-face type mask according to any one of claims 1 to 5.

7. A display control method for a full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering a periphery of the front transparent body, and a monocular image projection device, comprising: the image projection device has, on an inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, a projection unit having a beam splitter and a concave mirror, and an angle adjustment mechanism that adjusts a reflection angle of the beam splitter; the projection unit is disposed so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; The display control method further comprises: changing a display luminance of the display element in accordance with a reflection angle adjusted by the angle adjustment mechanism, the image projection device changing a display luminance of the display element in accordance with a reflection angle adjusted by the angle adjustment mechanism. Display control method.

8. A full-face mask including a front transparent body arranged in a portion corresponding to a portion covering at least both eyes of a wearer, a frame portion covering the periphery of the front transparent body, and a monocular image projection device, the full-face mask including a control computer and a monocular image projection device, the program being executed by the control computer, the control computer comprising: the image projection device has, on an inner surface side of the front transparent body, a display element, a lens portion that transmits light emitted from the display element, a projection unit having a beam splitter and a concave mirror, and an angle adjustment mechanism that adjusts a reflection angle of the beam splitter; the projection unit is disposed so that light emitted from the lens portion is incident on the beam splitter through a space on the inner surface side of the front transparent body, the light passes through the beam splitter and is reflected by the concave mirror, and the reflected light from the concave mirror is reflected by the beam splitter toward one eye of the wearer; the program causes the control computer to execute a process of changing the display luminance of the display element in accordance with the reflection angle adjusted by the angle adjustment mechanism. program.

Images