System, control method, and mobile object

Abstract

This display system 1 comprises: a transparent video projection member 2 that is disposed in an internal space 90 and displays a video content; a light-blocking member 3 that controls the degree of blocking of light incident on the transparent video projection member 2 from outside the internal space 90; and a control circuit 7. The video content includes a first phase in which a user in the internal space 90 is guided to a relaxed state, and a second phase in which the user is guided to an awakening state, the second phase being displayed after the first phase is displayed. The control circuit 7 displays the video content on the transparent video projection member 2, and controls the light-blocking member 3 such that the light-blocking degree during display in the second phase becomes lower than that during display in the first phase.

Description

System, control method and mobile object

[0001] The present disclosure relates to techniques for displaying video content on a transparent video projection component.

[0002] Patent document 1 describes a method in which a transparent display is provided between the windshield and the driver's seat, and the transmittance of a light-blocking image displayed behind the image displayed on the transparent display is adjusted according to the intensity of light directed toward the transparent display.

[0003] Japanese Patent Application Laid-Open No. 2020-79917

[0004] Patent document 1 merely discloses control to adjust the visibility of the transparent display in the driver's seat, but does not take into consideration guiding the driver to a state that corresponds to the video content being displayed on the transparent display.

[0005] The present disclosure provides a technology that improves the effect of inducing a user to be awake by displaying video content on a transparent video projection component within an interior space.

[0006] A system in one aspect of the present disclosure comprises a transparent image projection element arranged in an interior space for displaying video content, a shading element for controlling the degree of shading of light entering the transparent image projection element from outside the interior space, and a control circuit, wherein the video content includes a first phase for inducing a user in the interior space to a relaxed state, and a second phase that is displayed after the first phase for inducing the user to a wakeful state, and the control circuit displays the video content on the transparent image projection element and controls the shading element so that the degree of shading during the display of the second phase is smaller than the degree of shading during the display of the first phase.

[0007] According to this configuration, the effect of guiding the user into a state of awakening can be improved by displaying video content on a transparent video projection member within the interior space.

[0008] 1 is a diagram showing an example of a top view of a vehicle equipped with a display system; FIG. 2 is a diagram showing an example of a side view of a vehicle when a light blocking member is in an open state; FIG. 3 is a diagram showing an example of a side view of a vehicle when a light blocking member is in a closed state; FIG. 4 is a block diagram showing an example of an electrical configuration of a display system; FIG. 5 is a flowchart showing content output processing in a display system; FIG. 6 is a diagram showing an example of visibility of a transparent display in a vehicle cabin; FIG. 7 is a diagram showing an example of visibility of a transparent display in a vehicle cabin; FIG. 8 is a diagram showing an example of time-series change in the degree of shading of external light incident on a transparent display; and FIG. 9 is a diagram showing another example of time-series change in the degree of shading of external light incident on a transparent display.

[0009] (Knowledge underlying the present disclosure) Research is underway into a technology that comfortably wakes up a user by guiding the user to a relaxed state and then guiding the user to an awakened state in an interior space where external light enters, such as a vehicle interior, for example.

[0010] On the other hand, transparent image projection components such as organic electroluminescence (EL) displays are becoming more common. Such transparent image projection components can adjust the transmittance of light passing through the image projection component by adjusting the transmittance of a light-shielding image displayed behind the image to be displayed, as described in Patent Document 1, for example.

[0011] Therefore, the inventors discovered that if a user can view video content displayed on a transparent video projection component within the interior space, and further, the transmittance of light passing through the video projection component is adjusted, the effect of guiding the user into a state corresponding to the video content can be improved by utilizing external light entering from outside the interior space, and this led to the conceiving of each aspect of the present disclosure.

[0012] (1) A system according to one aspect of the present disclosure includes a transparent image projection element disposed in an interior space for displaying video content, a shading element for controlling the degree of shading of light entering the transparent image projection element from outside the interior space, and a control circuit, wherein the video content includes a first phase for inducing a user in the interior space to a relaxed state, and a second phase that is displayed after the first phase for inducing the user to a conscious state, and the control circuit displays the video content on the transparent image projection element and controls the shading element so that the degree of shading during the display of the second phase is smaller than the degree of shading during the display of the first phase.

[0013] According to this configuration, while the second phase is displayed on the transparent image projection member, the degree of blocking of external light entering the transparent image projection member from outside the internal space is smaller than during the first phase, so that more external light can pass through the transparent image projection member than during the first phase. Therefore, this configuration makes the internal space brighter during the second phase than during the first phase, thereby improving the effect of guiding a user, who has been induced into a relaxed state by the first phase display, into an awakened state by the second phase display.

[0014] (2) In the system described in (1) above, the interior space may be the interior space of a vehicle, the transparent image projection element may be disposed between the rear seat and the front seat of the vehicle, and the shading element may control the degree of shading of light incident on the transparent image projection element from the direction of travel of the vehicle.

[0015] According to this configuration, by controlling the degree of blocking of external light incident from outside the vehicle onto the transparent image projection member disposed between the front and rear seats in the direction of travel of the vehicle, it is possible to adjust the amount of external light that passes through the transparent image projection member. As a result, during the second phase display, the external light that passes through the transparent image projection member makes the interior space of the vehicle brighter than during the first phase display, thereby improving the effect of guiding the user, who has been induced into a relaxed state by the first phase display, into an alert state by the second phase display.

[0016] (3) In the system described in (1) above, the transparent image projection component may have a display surface for the image content and a back surface, and the light-blocking component may be a roller blind that opens and closes facing the back surface.

[0017] In this configuration, when the roller blind of the light-blocking member is opened, the interior space can be brightened without blocking external light that enters the back of the transparent image projection member, while when the roller blind is closed, the interior space can be darkened by blocking external light.

[0018] (4) In the system described in (1) above, the transparent image projection component has a display surface for the image content and a back surface, and the shading component may be at least one selected from the group consisting of a blackout curtain that opens and closes facing the back surface, a blind that opens and closes facing the back surface, and a light-control sheet that is attached to the back surface and controls the shading rate of light that enters the transparent image projection component.

[0019] In this configuration, if the light-blocking member is a light-blocking curtain, opening the light-blocking curtain of the light-blocking member can brighten the interior space without blocking external light incident on the back surface of the transparent image projection member. On the other hand, closing the light-blocking curtain can darken the interior space by blocking external light. If the light-blocking member is a blind, opening the blind of the light-blocking member can brighten the interior space without blocking external light incident on the back surface of the transparent image projection member. On the other hand, closing the blind can darken the interior space by blocking external light. If the light-blocking member is a light-control sheet, the brightness of the interior space can be changed by adjusting the amount of external light incident on the transparent image projection member with the light-control sheet.

[0020] (5) In the system described in (1) above, the control circuit may control the light blocking member to gradually increase the degree of light blocking during the display of the first phase.

[0021] In this configuration, while the first phase is being displayed, the degree of blocking of external light entering the rear surface of the transparent image projection component can be gradually increased to darken the interior space. This gradually improves the visibility of the first phase displayed on the transparent image projection component. As a result, the display of the first phase can be more effectively used to induce a relaxed state in the user.

[0022] (6) In the system described in (1) above, the control circuit may control the light blocking member to gradually decrease the degree of light blocking during the display of the second phase.

[0023] In this configuration, while the second phase is being displayed, the degree of blocking of external light entering the rear surface of the transparent image projection component can be gradually reduced, thereby brightening the interior space. This allows the stimulation provided to the user's vision to be gradually strengthened. As a result, the second phase display can be more effectively used to induce a state of awakening in the user.

[0024] (7) In the system described in (6) above, the control circuit may control the light blocking member during the display of the second phase so as to minimize the degree of light blocking at the end of the second phase.

[0025] In this configuration, the degree of light blocking is gradually reduced so as to minimize the degree of blocking of external light incident on the back surface of the transparent image projection component at the end of the second phase, thereby brightening the interior space without providing strong visual stimulation to the user in the interior space.

[0026] (8) In the system described in (1) above, the control circuit may control the operation of one or more devices included in a plurality of devices arranged in the internal space that perform an operation to stimulate one of the user's five senses, in addition to displaying the video content.

[0027] In this configuration, during the display of the first phase, the five senses of a user attempting to enter a relaxed state are stimulated, thereby helping the user transition to a relaxed state. Similarly, during the display of the second phase, the five senses of a user attempting to enter an alert state are stimulated, thereby helping the user transition to an alert state.

[0028] (9) In the system described in (8) above, the plurality of devices may include an acoustic device, a lighting device, and a diffuser.

[0029] In this configuration, the display of the first phase can stimulate the auditory, visual, or olfactory senses of a user who is trying to enter a relaxed state, thereby helping them transition to a relaxed state. Similarly, the display of the second phase can stimulate the auditory, visual, or olfactory senses of a user who is trying to enter an alert state, thereby helping them transition to an alert state.

[0030] (10) In the system described in (1) above, the video content may further include a third phase displayed between the first phase and the second phase to induce the user into a sleep state, and the control circuit may control the shading member so that the degree of shading during the display of the second phase is smaller than the degree of shading during the display of the third phase.

[0031] According to this configuration, during the display of the second phase on the transparent image projection member, the degree of blocking of external light entering the transparent image projection member from outside the internal space is smaller than during the display of the third phase, so that more external light can be transmitted through the transparent image projection member than during the display of the third phase. Therefore, this configuration makes the internal space brighter during the display of the second phase than during the display of the third phase, thereby improving the effect of guiding a user who has been induced into a sleep state by the display of the third phase into an awakened state by the display of the second phase.

[0032] (11) In another aspect of the present disclosure, a system includes a transparent image projection element disposed in an interior space for displaying video content, a shading element for controlling the degree of shading of light entering the transparent image projection element from outside the interior space, and a control circuit, wherein the video content includes a third phase for inducing a user in the interior space to sleep, and a second phase displayed after the third phase for inducing the user to wake up, and the control circuit displays the video content on the transparent image projection element and controls the shading element so that the degree of shading during the display of the second phase is smaller than the degree of shading during the display of the third phase.

[0033] According to this configuration, during the display of the second phase on the transparent image projection member, the degree of blocking of external light entering the transparent image projection member from outside the internal space is smaller than during the display of the third phase, so that more external light can be transmitted through the transparent image projection member than during the display of the third phase. Therefore, this configuration makes the internal space brighter during the display of the second phase than during the display of the third phase, thereby improving the effect of guiding a user who has been induced into a sleep state by the display of the third phase into an awakened state by the display of the second phase.

[0034] (12) Another aspect of the present disclosure provides a control method for a computer in a system including a transparent image projection element arranged in an internal space for displaying video content, and a shading element that controls the degree of shading of light entering the transparent image projection element from outside the internal space, wherein the video content includes a first phase that induces a user in the internal space to enter a relaxed state, and a second phase that is displayed after the first phase and induces the user to enter an alert state, and the control method displays the video content on the transparent image projection element and controls the shading element so that the degree of shading during the display of the second phase is smaller than the degree of shading during the display of the first phase.

[0035] According to this configuration, the same effects as those of the system described in (1) above can be obtained.

[0036] (13) In another aspect of the present disclosure, a moving body includes a transparent image projection element disposed in an internal space for displaying video content, a shading element for controlling the degree of shading of light entering the transparent image projection element from outside the internal space, and a control circuit, wherein the video content includes a first phase for inducing a user in the internal space to a relaxed state, and a second phase that is displayed after the first phase for inducing the user to a conscious state, and the control circuit displays the video content on the transparent image projection element and controls the shading element so that the degree of shading during the display of the second phase is smaller than the degree of shading during the display of the first phase.

[0037] According to this configuration, the same effects as those of the system described in (1) above can be obtained.

[0038] Note that the embodiments described below each represent a specific example of the present disclosure. The numerical values, shapes, components, steps, step orders, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in an independent claim that represents a top-level concept are described as optional components. Furthermore, in all embodiments, the respective contents can be combined.

[0039] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0040] (Embodiment 1) FIG. 1 is a diagram showing an example of a top view of a vehicle 9 equipped with a display system 1 (system). In the following description, as shown in the lower right of FIG. 1 , the traveling direction of the vehicle 9 is referred to as the fore-and-aft direction or Y direction, the direction in which the vehicle 9 moves forward is referred to as the forward or +Y direction, and the direction in which the vehicle 9 moves backward is referred to as the backward or −Y direction. The direction perpendicular to the ground on which the vehicle 9 is traveling is referred to as the up-and-down direction or Z direction, the direction from the vehicle 9 toward the ground on which the vehicle 9 is traveling in the up-and-down direction is referred to as the downward or −Z direction, and the direction opposite to the downward and −Z directions is referred to as the upward or +Z direction. The direction perpendicular to the fore-and-aft direction (Y direction) and the up-and-down direction (Z direction) is referred to as the left-and-right direction or X direction. In the left-and-right direction and X direction, the direction toward the right as the vehicle 9 moves forward is referred to as the right or +X direction, and the direction toward the left as the vehicle 9 moves forward is referred to as the left or −X direction.

[0041] As shown in Fig. 1 , a display system 1 (system) is disposed between a front seat 91 and a rear seat 92 of a vehicle 9 (mobile body), such as a passenger car, bus, or taxi. Specifically, the display system 1 includes a transparent display 2 (transparent image projection member), a light-blocking member 3, and a frame 99 (Figs. 2 and 3) that supports these components and is described below. Hereinafter, the interior space of the vehicle 9, in which the rear seat 92 located behind the front seat 91 (in the -Y direction) is disposed, will be referred to as a vehicle interior 90 (interior space). In other words, the display system 1 is disposed within the vehicle interior 90.

[0042] The front seat 91 includes a driver's seat of the vehicle 9. The rear seat 92 does not include a driver's seat of the vehicle 9.

[0043] For example, if the vehicle 9 is a so-called three-row seat vehicle and the first row of seats includes a driver's seat and a passenger seat, the seats included in the second and third row of seats may be rear seats 92, and the driver's seat and passenger seat included in the first row of seats may be front seats 91. Alternatively, the seats included in the third row of seats may be rear seats 92, and the driver's seat and passenger seat included in the first row of seats and the seats included in the second row of seats may be front seats 91.

[0044] Fig. 2 is a diagram showing an example of a side view of the vehicle 9 when the light blocking member 3 is in an open state. Fig. 3 is a diagram showing an example of a side view of the vehicle 9 when the light blocking member 3 is in a closed state. As shown in Figs. 2 and 3, the transparent display 2 is a plate-shaped transparent member, and has a transparent rectangular display surface 21 that displays video content toward the rear seat 92, i.e., in the -Y direction, and a transparent rectangular back surface 22 on the opposite side to the display surface 21.

[0045] The transparent display 2 is supported by a frame 99 at a position between the rear seat 92 of the vehicle 9 and the light-blocking member 3, with its longitudinal direction aligned with the X direction, so that the display surface 21 overlaps with the view in the direction of travel of the vehicle 9 (Y direction) when viewed from the rear seat 92. The transparent display 2 displays video content on the display surface 21 under the control of a control circuit 7 ( FIG. 4 ), which will be described later. The transparent display 2 is formed, for example, by a transparent organic EL display. The transparent display 2 has a constant light transmittance of 80% or more, 90% or more, or 100%.

[0046] Alternatively, a projector may be provided at the rear upper portion of the rear seat 92 of the vehicle 9, and the transparent display 2 may be configured with translucent glass (image projection member). In this way, under the control of a control circuit 7 (FIG. 4) described later, the projector projects video content onto the display surface 21 of the glass, thereby displaying the video content on the display surface 21.

[0047] The light-blocking member 3 is a roll screen made of a rolled-up sheet-like light-blocking material 31, and opens and closes in the vertical direction (Z direction) facing the back surface 22 of the transparent display 2. The light-blocking material 31 is a sheet-like material whose longitudinal direction is longer than the longitudinal direction of the transparent display 2 and whose lateral direction is also longer than the lateral direction of the transparent display 2. The light-blocking material 31 has a constant light-blocking rate of 100% (complete light blocking) or 95% or more.

[0048] Fig. 2 shows an example of an open state of the light-shielding member 3 (hereinafter referred to as the open state), and Fig. 3 shows an example of a closed state of the light-shielding member 3. Specifically, the light-shielding member 3 includes a winding section 300 that opens and closes the sheet-like light-shielding material 31 in the vertical direction.

[0049] The winding unit 300 includes a motor (not shown) controlled by a control circuit 7 (FIG. 4) described below, and a winding shaft 301 that is rotated by the motor around an axis (hereinafter referred to as the X-axis) parallel to the left-right direction (X-direction).

[0050] One end of the light-shielding material 31 is attached to a winding shaft 301 inside the winding unit 300. The end of the light-shielding material 31 opposite the winding shaft 301, i.e., the end in the -Z direction, is pulled downward from a winding opening 302 and wound upward as the winding shaft 301 is rotated around the X axis by a motor provided in the winding unit 300. The winding opening 302 is located closer to the back surface 22 than the winding shaft 301. A metal weight bar 32 is attached to the end of the light-shielding material 31 opposite the winding shaft 301, i.e., the end in the -Z direction.

[0051] A bracket 303 that detachably holds the weight bar 32 by magnetic force is provided below the rear surface 22 of the transparent display 2 in a direction from the winding shaft 301 along the rear surface 22. The bracket 303 is supported by the frame 99. A part or all of the upper surface of the bracket 303 is made of a magnetic member such as a magnet.

[0052] Therefore, one end of the light-shielding material 31 to which the weight bar 32 is attached is pulled downward along the back surface 22 from the winding opening 302 by the winding part 300, and when the weight bar 32 abuts against the upper surface of the bracket 303, the metal weight bar 32 is fixed to the bracket 303 by magnetic force. This places the light-shielding member 3 in a closed state, and the light-shielding material 31, which is longer in the longitudinal and lateral directions than the back surface 22, blocks light that enters the back surface 22 of the transparent display 2 from outside the vehicle interior 90, such as the windshield 93, and transmits through the display surface 21. As a result, less external light is taken into the vehicle interior 90, making the interior of the vehicle interior 90 darker than when the light-shielding member 3 is in the open state.

[0053] On the other hand, when one end of the light-shielding material 31 to which the weight bar 32 is attached is wound up to the winding opening 302 by the winding unit 300, the weight bar 32 abuts against and is fixed to the winding opening 302. This places the light-shielding member 3 in an open state, and light that enters the back surface 22 of the transparent display 2 from outside the vehicle interior 90, such as the windshield 93, and transmits through the display surface 21 is no longer blocked. This allows more external light to enter the vehicle interior 90, making the interior of the vehicle interior 90 brighter than when the light-shielding member 3 is in a closed state.

[0054] At least the area of ​​the circumferential surface of the weight bar 32 that comes into contact with the bracket 303 may be made of a magnetic material such as a magnet, and the bracket 303 may be made of metal. Alternatively, at least the area of ​​the circumferential surface of the weight bar 32 that comes into contact with the bracket 303 and part or all of the upper surface of the bracket 303 may be provided with magnets having different magnetic polarities.

[0055] However, as described above, if the weight bar 32 is made of metal and part or all of the upper surface of the bracket 303 is made of a magnetic material, it is possible to avoid the weight bar 32 being held by magnetic force to the metal near the front seat 91 as it moves from the winding port 302 to the bracket 303.

[0056] The frame 99 supports both ends of the transparent display 2 in the left-right direction (X direction) with a pair of support members extending in the up-down direction (Z direction). This reduces left-right vibration of the transparent display 2 while the vehicle 9 is traveling. This reduces the frequency of passengers in the vehicle cabin 90 viewing the video content displayed on the display surface 21 becoming physically unwell, such as experiencing car sickness. Note that one of the pair of support members may be omitted, so that only one end of the transparent display 2 in the left-right direction (X direction) is supported. The phrase "only one end of the transparent display 2 in the left-right direction (X direction) is supported" may be interpreted as "the first end is supported and the second end is not supported" or "the first end is not supported and the second end is supported." The transparent display 2 may include the first end and the second end in the left-right direction (X direction).

[0057] The frame 99 further includes support members (not shown) that are attached to the upper ends of the pair of support members and extend in the left-right direction (X direction), and these support members support the upper end of the transparent display 2 and the take-up unit 300 of the light-blocking member 3. Therefore, when the take-up unit 300 pulls downward one end of the light-blocking material 31 ( FIG. 3 ) to which the weight bar 32 is attached, the weight of the light-blocking material 31 ( FIG. 3 ) and the weight bar 32 can move the one end downward. This reduces the rotational force of the take-up shaft 301 that is required for the take-up unit 300 to pull the one end downward.

[0058] Furthermore, one end of a support member extending in the left-right direction (X direction) may be attached to the upper end of one of the pair of support members, so that the other end of the support member in the left-right direction is not supported.

[0059] Next, a description will be given of the electrical configuration of the display system 1. Fig. 4 is a block diagram showing an example of the electrical configuration of the display system 1. In addition to the above configuration, the display system 1 further includes a plurality of devices 100, a storage unit 8, a control circuit 7, an image control unit 20, a light blocking degree control unit 30, an audio control unit 40, an illumination control unit 50, and a scent control unit 60.

[0060] The devices 100 are arranged in the vehicle interior 90. The devices 100 perform operations to stimulate any of the user's five senses. The five senses are sight, hearing, touch, taste, and smell. The devices 100 include an audio device 4, a lighting device 5, and a diffuser 6.

[0061] The sound device 4 is configured by, for example, a speaker, and outputs sound content that stimulates the user's hearing and guides the user into a state corresponding to the phase.

[0062] The illumination device 5 is configured with, for example, RGBW-type LED (Light Emitting Diode) elements that emit blue light, green light, red light, and white light. The illumination device 5 outputs illumination light that guides the user into a state corresponding to the phase as an action that stimulates the user's vision. Note that the illumination device 5 is not limited to RGBW-type LED elements, and may be configured with, for example, RGB-type LED elements that emit blue light, green light, and red light, or LED elements that emit blue light and white light. Alternatively, the illumination device 5 may be configured with other elements that can emit colored light.

[0063] The diffuser 6 is, for example, an aroma diffuser, and diffuses a scent into the vehicle cabin 90 to stimulate the user's sense of smell and guide the occupants in the vehicle cabin 90 into a state corresponding to the phase.

[0064] The storage unit 8 is configured with a non-volatile rewritable storage device such as a hard disk drive or a solid state drive. The storage unit 8 pre-stores data of video content to be displayed on the display surface 21. The video content includes a relax phase (first phase), a sleep phase (third phase) displayed after the relax phase, and a wake phase (second phase) displayed after the sleep phase.

[0065] The relaxation phase is a phase in which occupants (hereinafter referred to as users) in the vehicle cabin 90 are guided to a relaxed state. As video content for the relaxation phase, for example, video content that guides the user to a relaxed state, such as video of a forest and / or a lush green river, can be used. The sleep phase is a phase in which occupants in the vehicle cabin 90 are guided to a sleep state. As video content for the sleep phase, for example, video content that guides the user to a sleep state, such as abstract video of signal waveforms, can be used. The wakefulness phase is a phase in which occupants in the vehicle cabin 90 are guided to an wakeful state. As video content for the wakefulness phase, for example, video content that guides the user to an wakeful state, such as video of a dawn scene and / or a daytime grassland, can be used.

[0066] The storage unit 8 may store the video content data without dividing it into phases, or may store it by dividing it into phases.

[0067] The storage unit 8 also stores in advance information indicating the end timing of each phase (hereinafter, end timing information). The end timing of each phase can be, for example, the elapsed time from the time when the video content of the first phase is displayed on the display surface 21. However, this is not limiting, and the time of day can also be used as the end timing of each phase.

[0068] The storage unit 8 may be configured to store in advance information indicating the start timing of each phase (hereinafter, start timing information) in the same manner as the end timing information. Alternatively, the storage unit 8 may be configured to store in advance start timing information without storing in advance the end timing information.

[0069] The storage unit 8 also stores in advance data of audio content to be output by the audio device 4. The audio content includes the same multiple phases as the video content. For example, audio content for the relaxation phase may be audio content that induces the user into a relaxed state, such as sounds recorded in a forest and / or abstract music. For example, audio content for the sleep phase may be audio content that induces the user into a sleep state, such as the sound of waves and / or birdsong. For example, audio content for the wakefulness phase may be audio content that induces the user into a wakeful state, such as music with a clear beat.

[0070] The storage unit 8 may store the data of the audio content without dividing it into phases, or may store it by dividing it into phases.

[0071] The control circuit 7 includes a central processing unit (CPU) (not shown) and memories (not shown) such as ROM and RAM. The control circuit 7 may be an ECU (Electronic Control Unit) that is standard equipment on the vehicle 9, or may be configured separately from the ECU. The control circuit 7 is connected to the memory unit 8, the video control unit 20, the shading degree control unit 30, the sound control unit 40, the lighting control unit 50, and the fragrance control unit 60 so as to be able to communicate with them.

[0072] The control circuit 7 refers to the timing information stored in the memory unit 8 and controls the operation of the transparent display 2, the shading member 3, the sound device 4, the lighting device 5 and the diffuser 6 so as to guide the occupants (hereinafter referred to as users) in the vehicle cabin 90 into a state corresponding to the phase.

[0073] Specifically, the control circuit 7 controls the operation of the transparent display 2, the light-blocking member 3, the sound device 4, the lighting device 5, and the diffuser 6 by outputting control signals to the video control unit 20, the light-blocking degree control unit 30, the sound control unit 40, the lighting control unit 50, and the fragrance control unit 60.

[0074] The video control unit 20 is configured with a drive circuit that drives the transparent display 2, and controls the operation of the transparent display 2 in accordance with a control signal from the control circuit 7. This control signal includes data of the video content to be displayed on the display surface 21 of the transparent display 2.

[0075] The light blocking degree control unit 30 is composed of a drive circuit that drives a motor (not shown) provided in the winding unit 300 (FIGS. 2 and 3) of the light blocking member 3, and controls the operation of the light blocking member 3 in accordance with a control signal from the control circuit 7. This control signal includes information indicating the degree to which the light blocking member 3 is closed (the degree to which it blocks external light incident on the image projection member).

[0076] The degree to which the light-shielding member 3 is closed is, for example, the ratio of the vertical length of the light-shielding material 31 (FIG. 3) pulled out from the winding opening 302 (FIG. 3) to the vertical length of the back surface 22 (FIG. 3). In other words, when the weight bar 32 is held by the bracket 303 and the light-shielding member 3 is in a closed state, the degree to which the light-shielding member 3 is closed is at its maximum, and the degree to which external light entering the back surface 22 is blocked is at its minimum, when the weight bar 32 is present at the winding opening 302 and the light-shielding member 3 is in an open state.

[0077] The light-blocking degree control unit 30 rotates a motor (not shown) included in the winding unit 300 ( FIG. 3 ) so that the rotation angle of the motor corresponds to the degree of closure of the light-blocking member 3, as indicated by the control signal received from the control circuit 7. The rotation speed of the motor may be, for example, the maximum speed, or a speed that is 90% or more, 70% or more, or 50% or more of the maximum speed. As a result, the winding shaft 301 ( FIGS. 2 and 3 ) attached to the motor rotates around the X axis, and the light-blocking material 31 ( FIG. 3 ) is wound upward or pulled downward. As a result, the degree of closure of the light-blocking member 3 corresponds to the degree of closure of the light-blocking member 3 indicated by the control signal received from the control circuit 7.

[0078] The audio control unit 40 is composed of a drive circuit (e.g., an amplifier) ​​that drives the audio device 4, and controls the operation of the audio device 4 in accordance with a control signal from the control circuit 7. This control signal includes data on the audio content to be output by the audio device 4.

[0079] The lighting control unit 50 is composed of a drive circuit that drives the lighting device 5, and controls the operation of the lighting device 5 in accordance with a control signal from the control circuit 7. This control signal includes information indicating the color tone and / or brightness of the illumination light to be output by the lighting device 5. The color tone of the illumination light is specified, for example, by the hue value, lightness value, and saturation value of the illumination light, or the RGBW values ​​corresponding to these. The brightness of the illumination light is specified, for example, by a ratio (for example, 90%) of the brightness of the brightest illumination light that the lighting device 5 can emit (dimming rate 100%).

[0080] The scent control unit 60 is composed of a drive circuit that drives the diffuser 6, and controls the operation of the diffuser 6 according to a control signal from the control circuit 7. This control signal includes information indicating the type of scent to be diffused into the vehicle interior 90 by the diffuser 6. The types of scent include, for example, forest scents and citrus scents.

[0081] The following describes the content output process executed in the display system 1. This description also details the control of the operation of each device by the control circuit 7. Note that in the following description, it is assumed that the storage unit 8 stores video content and audio content data without classifying them by phase.

[0082] Fig. 5 is a flowchart showing the content output process in the display system 1. When the control circuit 7 receives a control signal indicating an instruction to start the content output process from the ECU, it starts the content output process shown in Fig. 5. This control signal is input to the ECU by a user operating a mobile terminal such as a tablet terminal or an operating device mounted on the vehicle 9. When the content output process starts, the control circuit 7 reads out data and timing information of the video content and audio content from the storage unit 8.

[0083] (Step S1) In step S1, the control circuit 7 controls the operation of the transparent display 2, the sound device 4, the lighting device 5, and the diffuser 6 to output content corresponding to the relaxation phase in order to induce the user into a relaxed state.

[0084] Specifically, the control circuit 7 outputs a control signal including the data of the video content read from the storage unit 8 to the video control unit 20. The video control unit 20 acquires the data of the video content from the control signal and causes the transparent display 2 to display the video content on the display surface 21 of the transparent display 2. As a result, the video content of the relaxation phase, which is the first phase, is displayed on the display surface 21. In this way, by stimulating the user's vision with the video content of the relaxation phase that induces the user to enter a relaxed state, the user can be induced to enter a relaxed state.

[0085] The control circuit 7 outputs a control signal including the data of the audio content read from the storage unit 8 to the audio control unit 40. The audio control unit 40 acquires the data of the audio content from the control signal and causes the audio device 4 to output the audio content. As a result, the audio content of the relaxation phase, which is the first phase, is output.

[0086] In this way, stimulating the user's hearing with sound content for the relaxation phase that induces the user into a relaxed state can help the user transition to a relaxed state.

[0087] The control circuit 7 outputs a control signal including information indicating a color tone that induces the user into a relaxed state to the lighting control unit 50. The color tone that induces the user into a relaxed state is, for example, the average value of the RGBW values ​​of multiple pixels that make up the video content in the relaxation phase. The color tone that induces the user into a relaxed state is not limited to this, and may also be a predetermined RGBW value (fixed value). The lighting control unit 50 causes the lighting device 5 to output illumination light of the color tone that induces the user into a relaxed state, as indicated by the control signal.

[0088] Furthermore, the brightness that induces the user to enter a relaxed state may be determined in advance, and the control circuit 7 may output a control signal including information indicating the determined brightness to the lighting control unit 50. As a result, the lighting control unit 50 may cause the lighting device 5 to output illumination light of the brightness indicated by the control signal that induces the user to enter a relaxed state. Note that the brightness that induces the user to enter a relaxed state may be, for example, a brightness that is darker than the brightness of the illumination light that is predetermined in the lighting device 5 during normal use.

[0089] As described above, stimulating the user's vision with illumination light of a color and / or brightness that induces the user into a relaxed state can help the user transition into a relaxed state.

[0090] The control circuit 7 outputs a control signal including information indicating the type of scent that will induce the user into a relaxed state to the scent control unit 60. The type of scent that will induce the user into a relaxed state is predetermined, such as a forest scent. The scent control unit 60 causes the diffuser 6 to diffuse the type of scent indicated by the control signal into the vehicle interior 90.

[0091] In this way, stimulating the user's sense of smell with a scent that induces the user into a relaxed state can help the user transition into a relaxed state.

[0092] In step S1, the control circuit 7 may not control the operation of at least one of the acoustic device 4, the lighting device 5, and the diffuser 6. In step S1, the control circuit 7 may not control the operation of the acoustic device 4, the operation of the lighting device 5, the operation of the diffuser 6, or any combination thereof.

[0093] (Step S2) In the next step S2, the control circuit 7 controls the light blocking member 3 so as to increase the degree of blocking of external light entering the transparent display 2 from outside the vehicle interior 90.

[0094] Specifically, in step S2, control circuit 7 outputs a control signal including information indicating the maximum degree of closure of light blocking member 3 to light blocking degree control unit 30. Light blocking degree control unit 30 rotates a motor (not shown) provided in winding unit 300 ( FIG. 3 ) until the rotation angle of the motor matches the rotation angle indicated by the control signal and corresponding to the maximum degree of closure of light blocking member 3. Note that the term "match" here indicates that the values ​​match within a predetermined error range, and this also applies to the following description.

[0095] As a result, the light-shielding material 31 (FIG. 3) is pulled downward (in the -Z direction), and the weight bar 32 is held by the bracket 303 instantly from the start of step S2. As a result, the light-shielding member 3 is closed to the greatest extent, and the degree to which the light-shielding member 3 is closed is maximized, thereby shading the external light incident on the back surface 22 to the greatest extent.

[0096] FIG. 6 is a diagram showing an example of the visibility of the transparent display 2 in the vehicle interior 90. When the degree of blocking of external light incident on the back surface 22 (FIG. 3) is greatest, light traveling from the back surface 22 of the transparent display 2 (FIG. 3) toward the display surface 21 (FIG. 3) is blocked. Therefore, for example, as shown in FIG. 6, the video content of the relaxation phase is displayed on the display surface 21 without being transmitted. This can improve the visibility of the video content of the relaxation phase. As a result, the effect of inducing the user into a relaxed state by displaying the video content of the relaxation phase can be improved.

[0097] (Step S3) In the next step S3, the control circuit 7 refers to the timing information and determines whether or not it is time to end the relax phase. The control circuit 7 waits until it determines that it is time to end the relax phase (NO in step S3), and when it determines that it is time to end the relax phase (YES in step S3), it executes step S4.

[0098] (Step S4) In step S4, the control circuit 7 controls the operation of the lighting device 5 to output content according to the sleep phase, in the same manner as in step S1, in order to induce the user into a sleep state.

[0099] Note that in step S4, the control circuit 7 does not control the operation of the transparent display 2 and the audio device 4. However, in step S1, the display of video content including video content for the relax phase, sleep phase, and wake phase on the display surface 21 has begun, and the output of audio content including audio content for the relax phase, sleep phase, and wake phase has begun. Therefore, after it is determined in step S3 that the end timing of the relax phase has arrived, when step S4 is executed, video content for the sleep phase following the relax phase is displayed on the display surface 21, and audio content for the sleep phase is output by the audio device 4. This stimulates the user's hearing with the audio content for the sleep phase that induces the user to sleep. As a result, the user's transition to a sleep state can be assisted.

[0100] Specifically, in step S4, the control circuit 7 outputs a control signal including information indicating the brightness that induces the user into a sleep state to the lighting control unit 50. The brightness that induces the user into a sleep state is predetermined to be darker than the brightness that induces the user into a relaxed state, for example. The lighting control unit 50 causes the lighting device 5 to output illumination light of the brightness that induces the user into a sleep state, as indicated by the control signal.

[0101] This makes the interior of the vehicle compartment 90 darker than when the video content for the relaxation phase is displayed on the display surface 21, reducing the visual stimulation of the user, thereby helping the user transition to a sleep state.

[0102] The control circuit 7 may include information indicating the brightness that induces the user to sleep, and may further output a control signal to the lighting control unit 50 instructing the lighting control unit 50 to gradually decrease the brightness of the illumination light until the brightness reaches a level that induces the user to sleep. In this way, the lighting control unit 50 may drive the lighting device 5 in accordance with the control signal to gradually decrease the brightness of the illumination light output by the lighting device 5 until the brightness reaches a level that induces the user to sleep. In this case, the interior of the vehicle compartment 90 can be darkened without providing a strong visual stimulus to the user. This can further help the user transition to sleep.

[0103] Furthermore, in step S4, the control circuit 7 may output a control signal including information indicating a hue that induces the user to sleep to the lighting control unit 50, similar to step S1. The hue that induces the user to sleep is, for example, an average value of the RGBW values ​​of multiple pixels that constitute the video content of the sleep phase. The hue that induces the user to sleep is not limited to this, and may also be a predetermined RGBW value (fixed value). In this way, the lighting control unit 50 may cause the lighting device 5 to output illumination light of a hue that induces the user to sleep, as indicated by the control signal. Alternatively, in step S4, the control circuit 7 may not control the lighting device 5.

[0104] In this embodiment, in step S4, the control circuit 7 does not control the scent control unit 60. However, as in step S1, the type of scent that will induce the user to sleep may be determined in advance, and in step S4, the control circuit 7 may output a control signal including information indicating the type of scent that will induce the user to sleep to the scent control unit 60. This may cause the scent control unit 60 to diffuse the type of scent indicated by the control signal into the vehicle interior 90 using the diffuser 6.

[0105] After step S4, the control circuit 7 does not perform the same processing as step S2 in order to guide the user into a sleep state according to the sleep phase, but instead maintains the state of the light-shielding member 3 that was closed in step S2.

[0106] Therefore, from the time when the video content for the relaxation phase is displayed, light traveling from the back surface 22 ( FIG. 3 ) of the transparent display 2 toward the display surface 21 ( FIG. 3 ) remains blocked. Therefore, similar to FIG. 6 , the video content for the sleep phase is displayed on the display surface 21 without being transmitted through the back surface 22. This allows the user to focus on the video content for the sleep phase. As a result, the display of the video content for the sleep phase can be more effectively used to induce the user into a sleep state.

[0107] (Step S5) In the next step S5, the control circuit 7 refers to the timing information and determines whether or not the timing for ending the sleep phase has arrived. The control circuit 7 waits until it determines that the timing for ending the sleep phase has arrived (NO in step S5), and when it determines that the timing for ending the sleep phase has arrived (YES in step S5), it executes step S6.

[0108] (Step S6) In step S6, the control circuit 7 controls the operation of the lighting device 5 and the diffuser 6 to output content according to the wakefulness phase, in the same manner as in step S1, in order to induce the user into a wakeful state.

[0109] Note that, in step S6, similarly to step S4, the operation of the transparent display 2 and the audio device 4 is not controlled. However, in step S1, the display of video content including video content for the relax phase, sleep phase, and wake phase on the display surface 21 has begun, and the output of audio content including audio content for the relax phase, sleep phase, and wake phase has begun. Therefore, after it is determined in step S5 that the sleep phase has ended, when step S6 is executed, video content for the wake phase following the sleep phase is displayed on the display surface 21, and audio content for the wake phase is output by the audio device 4. This stimulates the user's hearing with the audio content for the wake phase that guides the user into a wakeful state. As a result, the user's transition to a wakeful state can be assisted.

[0110] Specifically, in step S6, the control circuit 7 outputs a control signal including information indicating a brightness level that will induce the user into an alert state to the lighting control unit 50. The brightness level that will induce the user into an alert state may be, for example, a brightness level that is brighter than the brightness level that will induce the user into a relaxed state described in step S1. The lighting control unit 50 causes the lighting device 5 to output illumination light of a brightness level that will induce the user into an alert state, as indicated by the control signal.

[0111] This makes the interior of the vehicle compartment 90 brighter than when the video content for the relaxation phase is displayed on the display surface 21, and provides a stronger visual stimulus to the user, thereby helping the user transition to an alert state.

[0112] The control circuit 7 may include information indicating the brightness that induces the user to enter an awake state, and may further output a control signal to the lighting control unit 50 instructing the lighting control unit 50 to gradually increase the brightness of the illumination light until the brightness reaches a level that induces the user to enter an awake state. As a result, the lighting control unit 50 may drive the lighting device 5 in accordance with the control signal so as to gradually increase the brightness of the illumination light output by the lighting device 5 until the brightness reaches a level that induces the user to enter an awake state. In this case, the interior of the vehicle compartment 90 can be brightened without providing a strong visual stimulus to the user. This can further help the user enter an awake state.

[0113] Furthermore, in step S6, the control circuit 7 may output a control signal including information indicating a hue that induces the user to an awake state to the lighting control unit 50, similar to step S1. The hue that induces the user to an awake state is, for example, an average value of the RGBW values ​​of multiple pixels that constitute the video content in the awake phase. The hue that induces the user to an awake state is not limited to this, and may also be a predetermined RGBW value (fixed value). In this way, the lighting control unit 50 may cause the lighting device 5 to output illumination light of a hue that induces the user to an awake state, as indicated by the control signal. Alternatively, in step S6, the control circuit 7 may not control the lighting device 5.

[0114] As in step S1, the control circuit 7 outputs a control signal including information indicating the type of scent that will induce the user to be alert to the scent control unit 60. The type of scent that will induce the user to be alert is predetermined to be, for example, a citrus scent. The scent control unit 60 causes the diffuser 6 to diffuse the type of scent indicated by the control signal into the vehicle interior 90.

[0115] In this way, stimulating the user's sense of smell with a scent that induces the user to be in an alert state can help the user transition to an alert state. Note that the control circuit 7 may not control the diffuser 6 in step S6.

[0116] (Step S7) In the next step S7, the control circuit 7 controls the light blocking member 3 so as to reduce the degree of blocking of external light entering the transparent display 2 from outside the vehicle interior 90.

[0117] Specifically, in step S7, control circuit 7 outputs a control signal including information indicating the minimum value of the degree to which light blocking member 3 is closed as information indicating the degree to which light blocking member 3 is closed to light blocking degree control unit 30. Light blocking degree control unit 30 rotates a motor (not shown) provided in winding unit 300 ( FIG. 3 ) until the rotation angle of the motor matches the rotation angle corresponding to the minimum value of the degree to which light blocking member 3 is closed, as indicated by the control signal.

[0118] As a result, the light-shielding material 31 (FIG. 3) is wound up, and the weight bar 32 is instantly pulled up to the winding opening 302 from the start of step S7. As a result, the light-shielding member 3 is in the open state. In this case, the degree to which the light-shielding member 3 is closed is the smallest, and the degree to which external light incident on the back surface 22 is blocked is the smallest.

[0119] 7 is a diagram showing an example of visibility of the transparent display 2 in the vehicle interior 90. When the degree of blocking of external light incident on the back surface 22 is smallest, light traveling from the back surface 22 ( FIG. 2 ) of the transparent display 2 toward the display surface 21 ( FIG. 2 ) is transmitted. Therefore, as shown in FIG. 7 , for example, the user can simultaneously view the video content of the wakefulness phase displayed on the display surface 21 and the scenery in the traveling direction of the vehicle 9, such as the front seat 91.

[0120] Furthermore, since light traveling from the back surface 22 (FIG. 2) of the transparent display 2 to the display surface 21 (FIG. 2) is transmitted, external light entering the vehicle 9 through the windshield 23 or the like can be taken into the vehicle interior 90 via the transparent display 2, thereby brightening the interior of the vehicle interior 90. This improves the effect of guiding a user who has been induced into a sleep state into an awakening state by displaying video content for the awakening phase.

[0121] FIG. 8 is a diagram showing an example of visibility of the transparent display 2 in the vehicle interior 90. The control circuit 7 ends the content output process after step S7. When the content output process ends and the display of the wakefulness phase video content on the display surface 21 ends, the light-blocking member 3 is opened in step S7 and then maintained in the open state. Therefore, light traveling from the back surface 22 of the transparent display 2 toward the display surface 21 ( FIG. 2 ) is transmitted. In this case, as shown in FIG. 8 , the user can view the scenery in the traveling direction of the vehicle 9, including the front seat 91 located forward (in the +Y direction) of the transparent display 2.

[0122] 9 is a diagram showing an example of a time series change in the degree of blocking of external light incident on the transparent display 2. The horizontal axis of Fig. 9 represents time, and the vertical axis represents the degree of blocking of external light incident on the transparent display 2. As described above, when the content output process (Fig. 5) is executed, display of video content on the display surface 21 of the transparent display 2 is started in step S1, and the video content of the initial relaxation phase is displayed.

[0123] 9 , in step S2, control is performed to close the light blocking member 3, thereby shading the external light incident on the transparent display 2 to a maximum value. Thereafter, while the video content of the sleep phase is being displayed, the degree of shading of the external light incident on the transparent display 2 is maintained at the maximum value. When the sleep phase ends, the video content of the wakefulness phase is displayed on the display surface 21. In step S7, control is performed to open the light blocking member 3, thereby shading the external light incident on the transparent display 2 to a minimum value.

[0124] Therefore, while the video content for the awake phase is being displayed, the degree of blocking of external light entering the transparent display 2 from outside the vehicle interior 90 is smaller than while the video content for the relax phase and the sleep phase is being displayed. This allows the amount of external light passing through the transparent display 2 to be greater while the video content for the awake phase is being displayed than while the video content for the relax phase and the sleep phase is being displayed.

[0125] Therefore, while the video content for the wake phase is being displayed, the interior of the vehicle compartment 90 can be brighter than while the video content for the relax phase and the sleep phase is being displayed on the transparent display 2. This can stimulate the visual sense of the user who has been induced into a relaxed state and a sleep state by the display of the video content for the relax phase and the sleep phase. As a result, the effect of guiding the user into a wakeful state by the display of the video content for the wake phase can be improved.

[0126] If the memory unit 8 classifies and stores video content data by phase, then in step S1, the control circuit 7 reads out video content data for the relax phase from the memory unit 8 and outputs a control signal including the video content data to the video control unit 20. Similarly, in step S4, the control circuit 7 further reads out video content data for the sleep phase from the memory unit 8 and outputs a control signal including the video content data to the video control unit 20. In step S6, the control circuit 7 further reads out video content data for the wake phase from the memory unit 8 and outputs a control signal including the video content data to the video control unit 20.

[0127] Similarly, if the storage unit 8 classifies and stores audio content data by phase, in step S1, the control circuit 7 reads out audio content data for the relax phase from the storage unit 8 and outputs a control signal including the audio content data to the audio control unit 40. Similarly, in step S4, the control circuit 7 further reads out audio content data for the sleep phase from the storage unit 8 and outputs a control signal including the audio content data to the audio control unit 40. In step S6, the control circuit 7 further reads out audio content data for the wake phase from the storage unit 8 and outputs a control signal including the audio content data to the audio control unit 40.

[0128] Furthermore, if start timing information is stored in the memory unit 8, the control circuit 7 refers to the start timing information and determines whether the sleep phase start timing has arrived, instead of determining whether the relax phase end timing has arrived, in step S3. Similarly, the control circuit 7 refers to the start timing information and determines whether the wake phase start timing has arrived, instead of determining whether the sleep phase end timing has arrived, in step S5.

[0129] The present disclosure can employ the following modifications.

[0130] (1) In the above embodiment, as shown in FIG. 9, an example has been described in which the control circuit 7 rotates a motor (not shown) provided in the winding unit 300 (FIG. 3) at the maximum speed or at 90% or more, 70% or more, or 50% or more of the maximum speed, thereby controlling the light-blocking member 3 so that the degree of blocking of external light incident on the transparent display 2 is minimized instantly from the start of step S7.

[0131] However, in step S7 (FIG. 5), the control circuit 7 may control the light blocking member 3 so as to gradually decrease the degree of blocking of external light incident on the transparent display 2. This configuration can be realized, for example, as follows.

[0132] In step S7 ( FIG. 5 ), the control circuit 7 outputs a control signal to the light-blocking degree control unit 30, the control signal including information indicating the minimum degree to which the light-blocking member 3 is closed, and further instructing the motor (not shown) of the winding unit 300 ( FIG. 3 ) to rotate at a predetermined speed slower than that of the above embodiment. The predetermined speed may be, for example, less than 50% or less than 30% of the maximum speed. In response to the control signal, the light-blocking degree control unit 30 rotates the motor (not shown) of the winding unit 300 ( FIG. 3 ) at a predetermined speed slower than that of the above embodiment, so that the rotation angle of the motor coincides with the rotation angle corresponding to the minimum degree to which the light-blocking member 3 is closed.

[0133] According to this configuration, the amount of external light incident on the transparent display 2 can be gradually increased to brighten the vehicle interior 90. This allows the stimulation given to the user's vision to be gradually strengthened. As a result, the effect of guiding the user into an awakened state by displaying video content in the awakened phase can be improved.

[0134] Similarly, in step S2 (FIG. 5), the control circuit 7 may control the light blocking member 3 so as to gradually increase the degree of blocking of external light incident on the transparent display 2. This configuration can be realized, for example, as follows.

[0135] In step S2 ( FIG. 5 ), the control circuit 7 outputs a control signal to the light-blocking degree control unit 30, the control signal including information indicating the maximum degree of closure of the light-blocking member 3, and further instructing the motor (not shown) of the winding unit 300 ( FIG. 3 ) to rotate at a predetermined speed slower than that of the above embodiment. The predetermined speed may be, for example, less than 50% or less than 30% of the maximum speed. In response to the control signal, the light-blocking degree control unit 30 rotates the motor (not shown) of the winding unit 300 ( FIG. 3 ) at a predetermined speed slower than that of the above embodiment, so that the rotation angle of the motor coincides with the rotation angle corresponding to the maximum degree of closure of the light-blocking member 3.

[0136] According to this configuration, the amount of external light incident on the transparent display 2 can be gradually reduced to darken the vehicle interior 90. This gradually improves the visibility of the video content for the relaxation phase and the sleep phase displayed on the transparent image projection member. As a result, the display of the video content for the relaxation phase and the sleep phase can be more effectively used to induce the user into a relaxed state.

[0137] Alternatively, in step S7 (FIG. 5), the control circuit 7 may control the light-blocking member 3 to minimize the degree of blocking of external light incident on the transparent display 2 at the end of the awakening phase, as shown in FIG. 10. FIG. 10 is a diagram showing another example of a time-series change in the degree of blocking of external light incident on the transparent display 2. This configuration can be realized, for example, as follows.

[0138] In step S7 (FIG. 5), control circuit 7 outputs a control signal to light-blocking degree control unit 30, the control signal including information indicating the minimum degree to which light blocking member 3 is closed and information indicating the time (length) of the wake-up phase, and further instructing light-blocking degree control unit 30 to set the degree to which light blocking member 3 is closed to the minimum value when the time for the wake-up phase has elapsed. As a result, light-blocking degree control unit 30, in accordance with the control signal, rotates a motor (not shown) provided in winding unit 300 (FIG. 3) at a speed slower than the maximum speed so that the rotation angle of the motor coincides with the rotation angle corresponding to the minimum degree to which light blocking member 3 is closed when the time for the wake-up phase has elapsed.

[0139] In this case, at the end of the wakefulness phase, the light blocking member 3 is controlled so that the degree of blocking of external light incident on the transparent display 2 is minimized. This allows the amount of external light incident on the transparent display 2 to be gradually increased without providing a strong visual stimulus to the user, thereby brightening the interior of the vehicle compartment 90. This further improves the effect of guiding the user to transition to an awakened state by displaying the video content in the wakefulness phase.

[0140] (2) In the above embodiment, an example has been described in which the winding unit 300 (FIGS. 2 and 3) of the light-blocking member 3 pulls out the light-blocking material 31 from top to bottom and winds up the light-blocking material 31 from bottom to top, thereby opening and closing the light-blocking member 3 in the vertical direction. However, contrary to the above embodiment, the winding unit 300 may be disposed below the lower end of the transparent display 2. In this way, the winding unit 300 may pull out the light-blocking material 31 from bottom to top and wind up the light-blocking material 31 from top to bottom, thereby opening and closing the light-blocking member 3 in the vertical direction.

[0141] Similarly, the winding unit 300 may be disposed to the left of the left end of the transparent display 2 so that the winding unit 300 pulls out the light-blocking material 31 from left to right and winds up the light-blocking material 31 from right to left, thereby opening and closing the light-blocking member 3 in the left-right direction. Conversely, the winding unit 300 may be disposed to the right of the right end of the transparent display 2 so that the winding unit 300 pulls out the light-blocking material 31 from right to left and winds up the light-blocking material 31 from left to right, thereby opening and closing the light-blocking member 3 in the left-right direction.

[0142] (3) In the above embodiment, an example has been described in which the light-blocking member 3 (FIGS. 2 and 3) is a roll screen that rolls up the sheet-like light-blocking material 31. However, the light-blocking member 3 may be a curtain screen that opens and closes a curtain-like light-blocking material having the same light-blocking rate as the light-blocking material 31 in the left-right direction (X direction) under the control of the control circuit 7.

[0143] Alternatively, the shading member 3 may be a blind that opens and closes by rotating multiple shading materials arranged in the vertical direction (Z direction) opposite the back surface 22, each of which has a shading rate similar to that of the shading material 31, around the X axis under the control of the control circuit 7.

[0144] In addition, a transparent light-controlling film (light-controlling sheet) that adjusts the degree of light blocking of light incident on the back surface 22 under the control of the control circuit 7 (Figure 5) may be attached to the back surface 22 of the transparent display 2 (Figures 2 and 3), and this may be used as the light-blocking member 3.

[0145] (4) The sleep phase may be omitted from the video content and audio content, and steps S4 and S5 of the content output process (FIG. 5) may be omitted.

[0146] Alternatively, the video content and audio content may not include a relaxation phase, and content corresponding to the first sleep phase may be output in step S1 of the content output process (FIG. 5). Accordingly, in step S3, the control circuit 7 may determine whether the end timing of the sleep phase has arrived, and steps S4 and S5 may be omitted.

[0147] (5) In the above embodiment, an example in which the display system 1 is used in the interior space of a vehicle 9 has been described. However, the display system 1 can be used not only in the interior space of a vehicle 9 but also in spaces where external light may enter, such as an office. In this case, the transparent display 2 and the light-blocking member 3 may be arranged so that the back surface 22 of the transparent display 2 faces a space where external light enters, such as a window in an office. Then, the control circuit 7 controls the light-blocking member 3 to adjust the degree of blocking of external light entering the transparent display 2 from the space.

[0148] The technology of the present disclosure is useful in the technical field of in-vehicle devices.

[0149] 1: Display system (system) 2: Transparent display (transparent image projection member) 3: Light blocking member 4: Acoustic device 5: Lighting device 6: Diffuser 7: Control circuit 21: Display surface 22: Back surface 90: Vehicle interior (internal space) 100: Multiple devices

Claims

1. A system comprising: a transparent video projection member disposed in an internal space for displaying video content; a light-shielding member for controlling the light-shielding degree of light incident on the transparent video projection member from outside the internal space; and a control circuit, wherein the video content includes a first phase for inducing a user in the internal space into a relaxed state and a second phase for inducing the user into a waking state, which is displayed after the first phase is displayed, and the control circuit displays the video content on the transparent video projection member and controls the light-shielding member so that the light-shielding degree during the display of the second phase is smaller than the light-shielding degree during the display of the first phase.

2. The system according to claim 1, wherein the internal space is the internal space of a vehicle, the transparent video projection member is disposed between the rear seat and the front seat of the vehicle, and the light-shielding member controls the light-shielding degree of light incident on the transparent video projection member from the traveling direction of the vehicle.

3. The system according to claim 1, wherein the transparent video projection member has a display surface and a back surface of the video content, and the light-shielding member is a roll screen that opens and closes facing the back surface.

4. The system according to claim 1, wherein the transparent video projection member has a display surface and a back surface of the video content, and the light-shielding member is at least one selected from the group consisting of a light-shielding curtain that opens and closes facing the back surface, a blind that opens and closes facing the back surface, and a light-dimming sheet attached to the back surface and controlling the light-shielding rate of light incident on the transparent video projection member.

5. The system according to claim 1, wherein the control circuit controls the light-shielding member so as to gradually increase the light-shielding degree during the display of the first phase.

6. The system according to claim 1, wherein the control circuit controls the light-shielding member so as to gradually decrease the light-shielding degree during the display of the second phase.

7. The system according to claim 6, wherein the control circuit controls the light-shielding member so that the light-shielding degree is minimized at the end of the second phase during the display of the second phase.

8. The control circuit controls the operation of one or more devices included in a plurality of devices that perform an operation of stimulating any of the five senses of the user, which are arranged in the internal space, along with the display of the video content. The system according to claim 1.

9. The plurality of devices include an audio device, a lighting device, and a diffuser. The system according to claim 8.

10. The video content further includes a third phase that is displayed between the first phase and the second phase and induces the user to a sleeping state. The control circuit controls the light-shielding member so that the light-shielding degree during the display of the second phase is smaller than the light-shielding degree during the display of the third phase. The system according to claim 1.

11. A system comprising: a transparent video projection member that displays video content and is arranged in an internal space; a light-shielding member that controls the light-shielding degree of light incident on the transparent video projection member from outside the internal space; and a control circuit. The video content includes a third phase that induces the user in the internal space to a sleeping state and a second phase that is displayed after the third phase and induces the user to a waking state. The control circuit displays the video content on the transparent video projection member and controls the light-shielding member so that the light-shielding degree during the display of the second phase is smaller than the light-shielding degree during the display of the third phase.

12. A control method in a computer of a system comprising a transparent video projection member that displays video content and is arranged in an internal space and a light-shielding member that controls the light-shielding degree of light incident on the transparent video projection member from outside the internal space. The video content includes a first phase that induces the user in the internal space to a relaxed state and a second phase that is displayed after the first phase is displayed and induces the user to a waking state. The method includes displaying the video content on the transparent video projection member and controlling the light-shielding member so that the light-shielding degree during the display of the second phase is smaller than the light-shielding degree during the display of the first phase.

13. A mobile body comprising: a transparent video projection member disposed in an internal space for displaying video content; a light shielding member for controlling the degree of light shielding of light incident on the transparent video projection member from outside the internal space; and a control circuit, wherein the video content includes a first phase for inducing a user in the internal space into a relaxed state and a second phase for inducing the user into a waking state, which is displayed after the first phase is displayed, and the control circuit displays the video content on the transparent video projection member and controls the light shielding member so that the degree of light shielding during the display of the second phase is smaller than the degree of light shielding during the display of the first phase.

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