JP2024062570A - Projection equipment - Google Patents

Abstract

To provide a projection device that can be improved in performance in transmitting a notification to an occupant.SOLUTION: A projection device 1 is roughly constituted by a projection part 11 that projects a projection image 70 corresponding to information to be notified S10 to an interior component 90 of a vehicle 9 relating to the information to be notified S10 that is notified to an occupant, and a control part 12 that controls the projection part 11 on the basis of the obtained information to be notified S10, so that the projection image 70 corresponding to the information to be notified S10 is projected on the interior component 90.SELECTED DRAWING: Figure 4

Description

The present invention relates to a projection device.

A known prior art display control device includes an estimation unit that estimates an obstructed area of a display area of a display device arranged behind a steering wheel that is obstructed by at least peripheral components of the display device, including the steering wheel, based on steering information and at least line-of-sight information, and a control unit that performs display adjustment so that display information that can be displayed on the display device is displayed in a non-obstructed area of the display area according to the estimated obstructed area (see, for example, Patent Document 1).

This display control device displays warning lights such as a door ajar warning light and a seat belt warning light in the display area as display information. The display control device can allow the driver to view the display information even if part of the display device is blocked by the steering wheel.

JP 2020-79879 A

Conventional display control devices, for example, have a problem in that there is a low correlation between the non-obstructed area and the displayed warning light, and the display position can change with the rotation of the steering wheel, making it difficult for the occupant to recognize the notification by the displayed warning light, and the notification is poorly transmitted to the occupant.

Therefore, the object of the present invention is to provide a projection device that can improve the communication of notifications to occupants.

One aspect of the present invention provides a projection device that includes a projection unit that projects a projection image corresponding to notification information onto an interior part of a vehicle related to the notification information to be notified to an occupant, and a control unit that controls the projection unit based on the acquired notification information to project a projection image corresponding to the notification information onto the interior part.

The present invention can improve the transmission of notifications to occupants.

FIG. 1(a) is an example of a front view of a projection device according to a first embodiment, and FIG. 1(b) is an example of a cross-sectional view taken along line AA in FIG. 1(a) as viewed from the direction of the arrow. FIG. 2A is an example of a block diagram of a projection device according to the first embodiment, and FIG. 2B is a diagram for explaining an example of an interior part of a vehicle. FIG. 3A is a cross-sectional view for explaining an example of a handle portion of the projection device according to the first embodiment, and FIG. 3B is a top view showing the example of the handle portion. FIG. 4(a) is a diagram showing an example of a projection image projected by the projection device of the first embodiment onto the door trim of the driver's door, and FIG. 4(b) is a diagram showing an example of a projection image projected onto the door trim of the passenger's door. FIG. 5(a) is a diagram showing an example of a case where a projection device relating to a modified example projects a projection image onto the A-pillar on the driver's seat side, and FIG. 5(b) is a diagram showing an example of a case where a projection image is projected onto the A-pillar on the passenger's seat side. FIG. 6A is a diagram showing an example of a notification regarding a half-open door from the projection device according to the first embodiment, and FIG. 6B is a diagram showing an example of a notification regarding lane departure from the projection device. FIG. 7 is an example of a block diagram of a projection device according to the second embodiment. FIG. 8 is a diagram showing an example of a design of the projection device according to the second embodiment.

[First embodiment]
(Overview of Projection Device 1)
FIG. 1(a) is an example of a front view of a projection device according to a first embodiment, and FIG. 1(b) is an example of a cross-sectional view of a cross section cut along line A-A in FIG. 1(a) as viewed from the direction of the arrows. FIG. 2(a) is an example of a block diagram of a projection device according to a first embodiment, and FIG. 2(b) is a diagram for explaining an example of an interior part of a vehicle. In each of the figures according to the embodiments described below, the ratio and shape between figures may differ from the actual ratio and shape. In FIG. 2(a), the flow of main signals and information is indicated by arrows. Furthermore, in FIG. 2(a) and FIG. 7 described later, the optical path of the projection light 30a is indicated by arrows.

As shown in FIGS. 1(a) to 2(a), the projection device 1 is generally configured to include a projection unit 11 that projects a projection image 70 corresponding to notification information _S10 onto an interior part 90 of a vehicle 9 related to notification information _S10 to be notified to an occupant, and a control unit 12 that controls the projection unit 11 based on the acquired notification information _S10 to project the projection image 70 corresponding to the notification information _S10 onto the interior part 90.

2B, the interior parts 90 may be, for example, a door trim 901 and a window glass 902 of a door 900 on the driver's seat 91 side, a door trim 904 and a window glass 905 of a door 903 on the passenger seat 92 side described later, an instrument panel 906, a windshield 907, an A-pillar 908 on the driver's seat 91 side, an A-pillar 909 on the passenger seat 92 side, a B-pillar 910 on the driver's seat 91 side described later, and a B-pillar 911 on the passenger seat 92 side described later, but are not limited to these. Note that the projected image 70 may be, for example, projected onto the door trim 913 and window glass 914 of the left and right doors 912 on the rear seat 93 side.

The notification information _S10 is, for example, information related to a notification about an open door, a notification about an approaching object, a notification about a departure from a lane, a notification about a distance between vehicles, a notification about a road sign, etc. This notification information _S10 is, for example, acquired from a vehicle control unit 95 that comprehensively controls the vehicle 9, but is not limited thereto, and may be acquired from a sensor that detects information notified by the projection device 1.

Notifications regarding open doors, approaching objects, and lane departure are discussed below.

The notification regarding the distance between vehicles is, for example, a notification indicating that the vehicle ahead is closer than a predetermined distance. The notification information _S10 includes, for example, information indicating that the vehicle ahead is closer than a predetermined distance. When the projection device 1 is configured to project a projection image 70 regarding the distance between vehicles, the projection device 1 projects the projection image 70 indicating the notification regarding the distance between vehicles onto, for example, a windshield 907 in front of the driver's seat 91, an instrument panel 906 near the boundary with the windshield 907, an A-pillar 908, or the like as an interior part 90 related to the notification.

The notification regarding road signs is, for example, a notification regarding signs on the road on which the vehicle is traveling. The notification information _S10 includes, for example, information regarding maximum speed, no overtaking, no entry, and stop. When the projection device 1 is configured to project a projection image 70 regarding road signs, the projection device 1 projects, for example, a projection image 70 indicating a notification regarding a distance between vehicles onto a windshield 907 in front of the driver's seat 91, an instrument panel 906 near the boundary with the windshield 907, an A-pillar 908, etc., as an interior part 90 related to notification.

When multiple pieces of information are to be notified to the occupant, the projection device 1 may be configured to switch between multiple projection images 70 as described below, or multiple notifications may be issued by multiple projection devices 1. Furthermore, the projection image 70 may not be projected in one location, but may be projected to move across multiple interior parts 90.

As shown in FIG. 1(b), the projection unit 11 has a handle 2, a condenser lens 4, and a projection lens 5. The projection unit 11 is attached to a housing 10. As an example, the projection device 1 is disposed on a ceiling 94, but is not limited thereto and may be disposed on a door or the like.

(Configuration of the housing 10)
The housing 10 is made of a resin material and has a long and narrow box shape. The housing 10 has a cylindrical portion 100a on the front surface 100. The cylindrical portion 100a has a first lens opening 100b which is an opening of the cylinder. The first projection lens 51 is exposed inside the first lens opening 100b.

As shown in FIG. 1(a), the left side surface 101 of the housing 10 has a left claw portion 101a provided on the left side surface 101 and a right claw portion 102a provided on the right side surface 102. The left claw portion 101a and the right claw portion 102a are arranged to fit into openings provided in the mounting destination.

The connector of the vehicle 9 is attached to the connector portion 103b. The connector pins 141 of the board 14 are exposed in the connector portion 103b. The board 14 is an elongated printed wiring board.

(Configuration of handle portion 2)
Fig. 3(a) is a cross-sectional view for explaining an example of the handle part of the projection device according to the first embodiment, and Fig. 3(b) is a top view showing an example of the handle part. In the following, as an example, a pattern formed by a transmission area 26 and a light-shielding area 27 will be explained.

As shown in FIG. 3(a), the handle portion 2 has a transparent substrate 20 formed into a long, thin plate using a transparent resin material that transmits light. As shown in FIG. 3(b), the first design 22 is formed on the front surface 200 of the transparent substrate 20, but may also be formed on the back surface 201, or may be formed on both the front surface 200 and the back surface 201. This first design 22 is projected to form a projected image 70 on the projection area 7.

The first pattern 22 is formed, for example, by a transmissive region 26 and a light-shielding region 27. The transmissive region 26 is a region that transmits the projection light 30a output from the light source unit 3. The light-shielding region 27 is a region that does not transmit the projection light 30a or has a lower transmittance than the transmissive region 26.

As an example, the first design 22 is formed by two areas, a transmissive area 26 and a light-shielding area 27, but this is not limited to this. The first design 22 may be colored, the light-shielding area 27 may have areas with multiple transmittances, or these may be combined.

The light-shielding region 27 may be formed, for example, by forming a metal film on the surface 200 of the transparent substrate 20 and etching the metal film, or by applying a light-shielding paint by printing or the like, or by applying a light-shielding paint to the surface 200 and then peeling off the paint at the location corresponding to the transparent region 26 with a laser, and is not limited to these methods.

(Configuration of light source unit 3)
2A, the light source unit 3 has a light emitting element 31a as a light source. Note that the light source of the light source unit 3 may be configured with a plurality of light emitting elements instead of a single light emitting element.

As shown in FIG. 1(b), the light-emitting element 31a is disposed on the surface 140 of the substrate 14. As an example, the light-emitting element 31a is an LED (Light Emission Diode) element that outputs white projection light 30a, but is not limited to this and may be an LD (Laser Diode) element or the like.

(Configuration of Condenser Lens Unit 4)
The condenser lens unit 4 is formed using a resin material. The condenser lens unit 4 has a first condenser lens 41. As an example, the first condenser lens 41 is formed as a convex lens using a resin material. Note that the condenser lens unit 4 may not be provided when the light source unit 3 uses a light-emitting element 31a with high directivity or when a condenser lens is attached to the light-emitting element 31a.

As shown in FIG. 1(b), the first focusing lens 41 is configured to guide the divergent projection light 30a output from the light-emitting element 31a to the first pattern 22 arranged opposite it.

As shown in FIG. 1(b), the condenser lens unit 4 has a circular hole 402. This hole 402 is used for positioning with the projection lens unit 5.

(Configuration of Projection Lens Unit 5)
The projection lens unit 5 is configured to project a magnified projection image 70 of the first design 22 onto the projection area 7. The projection lens unit 5 is formed, for example, using a resin material. As shown in FIG. 1B, the projection lens unit 5 has an opening 500. The handle unit 2 is attached to the opening 500.

The projection lens unit 5 has a first projection lens 51. The first projection lens 51 is configured as a biconvex lens to enlarge and project the condensed projection light 30a.

The first projection lens 51 projects the projection light 30a, which is focused by the first focusing lens 41 and arrives through the first pattern 22, onto the projection area 7 in an enlarged form, forming a projection image 70.

The projection lens unit 5 has a cylindrical portion 502 that is inserted into the hole 402 of the condenser lens unit 4. By inserting this cylindrical portion 502 into the hole 402, the handle portion 2, the condenser lens unit 4, and the projection lens unit 5 are positioned and integrated.

(Configuration of control unit 12)
The control unit 12 is a microcomputer including a CPU (Central Processing Unit) that performs calculations and processing on acquired data according to a stored program, a RAM (Random Access Memory) that is a semiconductor memory, and a ROM (Read Only Memory). The ROM stores, for example, a program for operating the control unit 12. The RAM is used as a storage area for temporarily storing calculation results, for example. The control unit 12 is disposed on a substrate 14.

The control unit 12 is electrically connected to the light-emitting element 31a as shown in Fig. 2(a). The control unit 12 is configured to control the turning on and off of the light-emitting element 31a by outputting a control signal _S1 . The light-emitting element 31a turns on when the control signal _S1 is input, and turns off when the control signal S1 is not input. The control signal _S1 is, for example, a PWM (Pulse Width Modulation) signal, but is not limited to this.

Below we explain some examples of notifications about approaching objects and about open doors.

Regarding notification regarding approaching objects, FIG. 4(a) is a diagram showing an example of a projection image projected by the projection device of the first embodiment onto the door trim of the driver's door, and FIG. 4(b) is a diagram showing an example of a projection image projected onto the door trim of the passenger's door.

When the control unit 12 acquires notification information _S10 indicating the approach of an object to the vehicle 9, it controls the projection unit 11 to project the projection image 70 onto the door trim of the door on the side where the object is approaching as the interior part 90 of the vehicle 9 related to the acquired notification information _S10 .

The notification regarding the approach of an object is, for example, a notification that notifies the approach of an object such as a living thing such as a person or an animal, another vehicle, or an installed object. The notification information _S10 includes, for example, information regarding in what direction the distance between the vehicle 9 and the object is approaching. When the projection device 1 is configured to project a projection image 70 regarding the approach of an object, the control unit 12 projects the projection image 70 indicating the notification regarding the approach of an object onto, for example, the door trim, window glass, A-pillar, or the like of the door on the side where the approach of the object is detected as the interior part 90 related to the notification.

Figures 4(a) and 4(b) show, as an example, a projection image 70 that is projected when a bicycle or vehicle (two-wheeled or four-wheeled) approaching from behind is detected while the vehicle is stopped and there is a possibility of a collision with the door when the door is opened, and the notification information _S10 is related to a notification to assist in collision avoidance, etc.

As an example, as shown in FIG. 4( a ), when the acquired notification information _S10 indicates that a bicycle is approaching the door 900 on the driver's seat 91 side, the control unit 12 controls the projection unit 11 to project the projection image 70 onto the door trim 901 of the door 900.

As an example, as shown in FIG. 4( b ), when the acquired notification information _S10 indicates that a bicycle is approaching the door 903 on the passenger seat 92 side, the control unit 12 controls the projection unit 11 to project the projection image 70 onto the door trim 904 of the door 903.

The control unit 12 may also control the light source unit 3 to cause the light emitting element 31a to blink, thereby projecting a blinking projection image 70.

The projection device 1 may be configured to switch between multiple patterns in order to project the projection image 70 onto the door trim 901 on the driver's seat 91 side and the door trim 904 on the passenger seat 92 side, and may be configured to change the angle of the projection unit 11 by an actuator.

Figure 5(a) is a diagram showing an example of a case where a projection device according to a modified example projects a projection image onto the A-pillar on the driver's seat side, and Figure 5(b) is a diagram showing an example of a case where a projection image is projected onto the A-pillar on the passenger's seat side.

As a modified example, the projection device 1 may be configured to project the projection image 70 onto the A-pillar 908 on the driver's seat 91 side when an object is approaching the driver's seat 91 side, as shown in FIG. 5(a). The projection device 1 may be configured to project the projection image 70 onto the A-pillar 909 on the passenger's seat 92 side when an object is approaching the passenger's seat 92 side, as shown in FIG. 5(b). FIGS. 5(a) and 5(b) show the projection image 70 when a person is approaching, as an example.

Regarding a Notification Regarding an Unclosed Door FIG. 6A is a diagram showing an example of a notification regarding a half-open door of the projection device according to the first embodiment.

When the control unit 12 acquires notification information _S10 relating to an open door, it controls the projection unit 11 to project the projection image 70 onto the door trim of the open door as an interior part 90 of the vehicle 9 related to the acquired notification information _S10 .

The notification regarding an unclosed door is, for example, a notification indicating that the door of the vehicle 9 is not completely closed, in other words, that the door is ajar. The notification information _S10 includes, for example, information on whether the ajar door is the door 900 on the driver's seat 91 side or the door 903 on the passenger seat 92 side. When the projection device 1 is configured to project a projection image 70 regarding a ajar door, the control unit 12 projects, for example, the projection image 70 indicating the notification regarding ajar door onto the door trim of the door for which the ajar door has been detected.

As an example, as shown in Fig. 6(a), when the acquired notification information _S10 indicates that the door of the passenger seat 92 is ajar, the control unit 12 controls the projection unit 11 to project the projection image 70 onto the door trim 904 of the door 903. When the acquired notification information _S10 indicates that the door of the driver's seat 91 is ajar, the control unit 12 projects the projection image 70 onto the door trim 901 of the door 900. In the projection image 70 shown in Fig. 6(a), a mark indicating that the door 903 on the passenger seat 92 side is open is projected together with text onto the door trim 904 of the door 903 on the passenger seat 92 side, making it easier for the occupant to recognize the notification.

Regarding Notification Regarding Lane Departure FIG. 6B is a diagram showing an example of a notification regarding lane departure of the projection device according to the first embodiment.

The notification regarding lane departure is, for example, a notification that notifies the driver that the vehicle 9 is about to deviate from the lane or has deviated from the lane. The notification information _S10 includes, for example, information regarding the direction in which the vehicle 9 is about to deviate or has deviated. When the projection device 1 is configured to project a projection image 70 regarding lane departure, the control unit 12 projects the projection image 70 indicating the notification regarding lane departure onto the door trim of the door on the side where the departure is detected.

For example, as shown in Fig. 6B, when the notification information _S10 indicates that the vehicle is about to deviate from the left lane or has deviated from the lane, the control unit 12 projects a projection image 70 notifying the vehicle of the departure from the lane onto the door trim 904 of the door 903 on the passenger seat 92 side. Also, when the notification information _S10 indicates that the vehicle is about to deviate from the right lane or has deviated from the lane, the control unit 12 projects a projection image 70 notifying the vehicle of the departure from the lane onto the door trim 901 of the door 900 on the driver's seat 91 side. In the projection image 70 shown in Fig. 6B, a mark indicating the departure from the left lane is projected together with text onto the door trim 904 of the door 903 on the departure side, making it easier for the occupants to recognize the notification.

(Effects of the First Embodiment)
The projection device 1 according to the present embodiment can improve the communicability of the notification to the occupant. Specifically, the projection device 1 projects the projection image 70 onto the interior part 90 related to the notification to the occupant, so that the occupant can easily recognize the notification and the communicability of the notification is improved compared to the case where the notification is given to a place less related to the notification.

The projection device 1 projects a projection image 70 including marks and characters indicating the contents of the notification onto an interior component 90 related to the notification, making it easier for occupants to intuitively recognize the notification compared to a case in which this configuration is not adopted.

When the notification is a warning about an approaching vehicle or a door being ajar, the projection device 1 projects a projection image 70 onto the door trim related to the notification, so the area is larger and easier for the occupants to recognize than when it is displayed on the meter panel where the speedometer, etc. are located.

The projection device 1 makes it easier for occupants to recognize notifications, so compared to when notifications are difficult to recognize, occupants can take evasive action before the automatic braking function or other functions are activated or a warning sound is sounded, reducing the annoyance caused by the activation of functions.

[Second embodiment]
The second embodiment differs from the first embodiment in that the projection unit is configured to be able to project a plurality of projection images.

Figure 7 is an example of a block diagram of a projection device according to the second embodiment. Figure 8 is a diagram showing an example of a design of a projection device according to the second embodiment. Note that in the embodiments described below, parts having the same functions and configurations as those in the first embodiment are given the same reference numerals as those in the first embodiment, and their explanations will be omitted.

The projection unit 11 has a plurality of patterns corresponding to the notification information _S10 , and a plurality of light sources that output projection light for each of the plurality of patterns. The control unit 12 is configured to select a pattern to be projected from the plurality of patterns and a light source corresponding to the pattern to be projected from the plurality of light sources based on the _acquired notification information S10, and to control the projection unit 11 to project a projection image 70 of the pattern to be projected onto an interior part 90 of the vehicle 9 related to the notification information _S10 .

The projection device 1 of this embodiment is configured to switch between four patterns as shown in Figs. 7 and 8. As an example, the projection unit 11 projects the projection image 70 by the light-emitting element 31a, the first condensing lens 41, the first pattern 22, and the first projection lens 51, and the light-emitting element 31b, the second condensing lens 42, the second pattern 23, and the second projection lens 52 toward the door trim 901 on the driver's seat 91 side. As an example, the projection unit 11 projects the projection image 70 by the light-emitting element 31c, the third condensing lens 43, the third pattern 24, and the third projection lens 53, and the light-emitting element 31d, the fourth condensing lens 44, the fourth pattern 25, and the fourth projection lens 54 toward the door trim 904 on the passenger seat 92 side.

(Configuration of handle portion 2)
As shown in Fig. 8, the handle portion 2 has a first design 22 to a fourth design 25. The first design 22 and the second design 23 are projected onto a door trim 901 on the driver's seat 91 side. The first design 22 is projected, for example, as a projected image 70 shown in Fig. 4(a). The second design 23 is projected, for example, as a projected image 70 shown in Fig. 5(a) onto the door trim 901.

The third design 24 and the fourth design 25 are projected onto the door trim 904 on the passenger seat 92 side. The third design 24 is projected, for example, as the projection image 70 shown in FIG. 4(b). The fourth design 25 is projected, for example, as the projection image 70 shown in FIG. 5(b) onto the door trim 904.

(Configuration of light source unit 3)
The light source unit 3 has light emitting elements 31a to 31d as light sources corresponding to the first to fourth patterns 22 to 25. The light emitting elements 31a to 31d are, as an example, LED elements that output white projection light 30a to 30d, but are not limited thereto.

The light emitting elements 31a to 31d are turned on and off based on control signals S ₁ to S ₄ output from the control unit 12. Note that the light source unit 3 may be configured such that one light source is composed of a plurality of light emitting elements.

(Configuration of Condenser Lens Unit 4)
The condenser lens unit 4 has a first condenser lens 41 to a fourth condenser lens 44 corresponding to the light emitting elements 31a to 31d. The first condenser lens 41 to the fourth condenser lens 44 are configured to condense the projected light 30a to 30d and guide it to the corresponding first pattern 22 to fourth pattern 25. The first condenser lens 41 to the fourth condenser lens 44 may be integrally formed, or may be formed separately and attached to the housing 10.

(Configuration of Projection Lens Unit 5)
The projection lens unit 5 has a first projection lens 51 to a fourth projection lens 54 corresponding to the first design 22 to the fourth design 25. The first projection lens 51 and the second projection lens 52 project a projection image 70 onto the same projection area 7 of a door trim 901 on the driver's seat 91 side. The third projection lens 53 and the fourth projection lens 54 project a projection image 70 onto the same projection area 7 of a door trim 904 on the passenger seat 92 side. The first projection lens 51 to the fourth projection lens 54 may be integrally formed, or may be formed separately and attached to the housing 10.

(Configuration of control unit 12)
The control unit 12 is electrically connected to the light emitting elements 31a to 31d and determines which of the light emitting elements 31a to 31d are turned on based on the obtained notification information _S10 .

(Effects of the Second Embodiment)
The projection device 1 of the present embodiment can switch between multiple projection images 70, and therefore can improve the communicability of multiple notifications to the occupants compared to a case where this configuration is not adopted.

As a modified example, the projection device 1 may be configured to project a dynamic projection image 70 by continuously switching between multiple projection images 70.

By using at least one of the embodiments of the projection device 1 described above, it is possible to improve the communication of notifications to passengers.

Although several embodiments and modifications of the present invention have been described above, these embodiments and modifications are merely examples and do not limit the invention as claimed. These novel embodiments and modifications can be embodied in various other forms, and various omissions, substitutions, modifications, etc. can be made without departing from the gist of the present invention. Furthermore, not all combinations of features described in these embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Furthermore, these embodiments and modifications are included within the scope and gist of the invention, and are included in the scope of the invention and its equivalents as set forth in the claims.

1...Projection device, 2...Handle portion, 3...Light source portion, 4...Condenser lens portion, 5...Projection lens portion, 7...Projection area, 9...Vehicle, 10...Housing, 11...Projection portion, 12...Control portion, 14...Substrate, 20...Transparent substrate, 22-25...First to fourth patterns, 26...Transmission area, 27...Light-shielding area, 30a-30d...Projection light, 31a-31d...Light-emitting element, 41-44...First to fourth condenser lenses, 51-54...First to fourth projection lenses, 70...Projection image, 90...Interior part, 91...Driver's seat, 92...Passenger seat, 93...Rear seat, 94...Ceiling, 95...Vehicle control portion, 100...Front, 100a...Cylindrical portion, 100b...first lens opening, 101...left side, 101a...left claw portion, 102...right side, 102a...right claw portion, 103b...connector portion, 140...surface, 141...connector pin, 200...surface, 201...back side, 402...hole portion, 500...opening, 502...cylindrical portion, 900...door, 901...door trim, 902...window glass, 903...door, 904...door trim, 905...window glass, 906...instrument panel, 907...front glass, 908...A pillar, 909...A pillar, 910...B pillar, 911...B pillar, 912...door, 913...door trim, 914...window glass

Claims (4)

a projection unit that projects a projection image corresponding to notification information to be notified to an occupant onto an interior part of the vehicle related to the notification information;
a control unit that controls the projection unit based on the acquired notification information to project the projection image corresponding to the notification information onto the interior part;
A projection device comprising: When the control unit acquires the notification information indicating the approach of an object to the vehicle, the control unit controls the projection unit to project the projection image onto a door trim of a door on a side where the object is approaching as the interior part of the vehicle related to the acquired notification information.
2. The projection device of claim 1. When the control unit acquires the notification information related to an open door, the control unit controls the projection unit to project the projection image onto a door trim of the open door as the interior part of the vehicle related to the acquired notification information.
2. The projection device of claim 1. the projection unit has a plurality of patterns corresponding to the notification information and a plurality of light sources that output projection light for each of the plurality of patterns;
The control unit selects a pattern to be projected from the plurality of patterns and a light source corresponding to the pattern to be projected from the plurality of light sources based on the acquired notification information, and controls the projection unit to project the projected image of the pattern to be projected onto the interior part of the vehicle related to the notification information.
4. A projection device according to claim 1.