Display device

Abstract

A display device (10) is provided with: a first plate material (110) on which an image is projected on a projection surface (100); a vibrator (130) that is fixed to the rear surface (111) of the first plate material (110) and that vibrates the first plate material (110) and emits sound; and a second plate material (120) fixed to the first plate material (110) such that the front surface (121) faces the back surface (111) of the first plate material (110), and the vibrator (130) is disposed in a hole (122) provided in the front surface (121) of the second plate material (120).

Description

Technical Field

[0001] The present disclosure relates to a display device. Background Art

[0002] Patent Document 1 discloses a speaker device for a vehicle. In this speaker device for a vehicle, a vibration device is fixed to an interior material in a vehicle interior, and the interior material is vibrated using the vibration device as a vibration source to generate sound.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2005-014793 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] By combining the vehicle speaker device of Patent Document 1 with a display device, it is possible to output sound and video simultaneously, but they are independently displayed and lack a sense of unity.

[0008] An object of one aspect of the present disclosure is to realize integrated projection of sound and image.

[0009] Solutions for solving problems

[0010] In order to solve the above-mentioned problems, a display device of one scheme of the present invention includes: a first plate having a projection surface on the front side, and an image is projected toward the projection surface of the first plate from a projection device arranged inside a movable body; a vibrator, which is fixed to the back side of the first plate and emits sound by vibrating the first plate; and a second plate, which is fixed to the first plate in a manner that the front side of the second plate is opposite to the back side of the first plate, and a hole is provided on the front side of the second plate, and the vibrator is arranged on the inner side of the hole.

[0011] Effects of the Invention

[0012] According to one aspect of the present disclosure, it is possible to perform integrated projection of sound and image. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram showing the internal structure of a moving object on which the display device according to one embodiment of the present disclosure is mounted.

[0014] Figure 2 It is a top view of a display device according to one embodiment of the present disclosure.

[0015] Figure 3 It is along Figure 2 AA cross-sectional view.

[0016] Description of Reference Numerals

[0017] 1. Moving body; 3. Seat; 10. Display device; 11. Projection device; 12. Control device; 100. Projection surface; 101. Connection surface; 110. First plate; 111. Back surface; 120. Second plate; 121. Front surface; 122. Hole; 130. Vibrator; 140. Vibration reduction unit. DETAILED DESCRIPTION

[0018] Figure 1 1 is a diagram showing an example of the internal structure of a moving object equipped with a display device according to an embodiment of the present disclosure. Figure 1 In the embodiment of the present disclosure, the display device 10 is installed along the ceiling 20 of the vehicle cabin 2 of the vehicle 1. Figure 1 In the example shown, the moving body 1 is a bus, and a plurality of seats 3 are arranged along the bottom surface 22. The moving body 1 provided with the display device 10 is not limited to a bus, but may also be a vehicle such as a car, a train, a ship, an airplane, a spacecraft, etc. Figure 1 The front-rear direction, the left-right direction, and the up-down direction are defined as shown by the arrows.

[0019] A display device 10, a projection device 11, and a control device 12 are arranged in the cabin 2 of the mobile body 1. The projection device 11 is arranged, for example, on the inner side of the cabin 2. The control device 12 is, for example, an ECU (Electronic Control Unit). The control device 12 can communicate with the display device 10 and the projection device 11 in a wired or wireless manner to control the display device 10 and the projection device 11. The control device 12 is arranged around the driver's seat located at the front of the mobile body 1. In addition, the position where the control device 12 is arranged is not limited to Figure 1 The position shown may be arranged on the back side of the ceiling 20 , the underside of the bottom plate 22 , the inner side of the projection device 11 , or may be arranged outside the moving body 1 .

[0020] The display device 10 has a projection surface 100 and a connection surface 101. The projection surface 100 of the display device 10 is located on the front side of the display device 10 and is arranged to face the seat 3. The image is projected from the projection device 11 onto the projection surface 100 under the control of the control device 12.

[0021] The connection surface 101 is located on the rear side of the projection surface 100. The connection portion 21 is connected to the connection surface 101. The display device 10 is connected to the ceiling 20 of the vehicle interior 2 via the connection portion 21.

[0022] exist Figure 1In the embodiment, the bottom surface 22 rises toward the rear, and the installation position of the seat 3 arranged on the bottom surface 22 also rises toward the rear. The projection surface 100 of the display device 10 is arranged at a position that rises toward the rear in accordance with the height at which the seat 3 is installed. In the following description, it is assumed that the seats 3 are arranged in five rows in the front-rear direction and in two rows in the left-right direction in the vehicle room 2.

[0023] Figure 2 is a top view of a display device according to an embodiment of the present disclosure. Specifically, Figure 2 It is a plan view of the display device 10 as viewed from the connection surface 101 side. Figure 3 It is along Figure 2 AA cross-sectional view.

[0024] like Figure 3 As shown, the display device 10 includes a first plate 110, a second plate 120, and a vibrator 130. The first plate 110 is formed of a fibrous material such as kenaf board. The second plate 120 is formed of a material such as an iron plate having a higher vibration attenuation capability than the material of the first plate 110. The first plate 110 has a projection surface 100 on its front surface. For example, a projection film is attached to the projection surface 100, so that it has a smooth surface suitable for projection of an image. The second plate 120 has a connecting surface 101 on its back surface. The connecting portion 21 is connected to the connecting surface 101.

[0025] In the first plate 110, the back surface 111 is the back side of the projection surface 100. In the second plate 120, the front surface 121 is the back side of the connection surface 101. The first plate 110 and the second plate 120 are arranged so that the back surface 111 of the first plate 110 and the front surface 121 of the second plate 120 face each other.

[0026] A vibrator 130 is fixed to the back surface 111 of the first plate 110. A hole 122 is provided on the front surface 121 of the second plate 120. The back surface 111 of the first plate 110 is fixed to the front surface 121 of the second plate 120 in such a manner that the vibrator 130 is located inside the hole 122. As a method of fixing the first plate 110 and the second plate 120, any method such as bonding or screwing can be used.

[0027] like Figure 2 As shown, the edge of the hole 122 is rectangular. The vibrator 130 is arranged at the center of the edge of the hole 122 in a plan view. In addition, the shape of the edge of the hole 122 is not limited to a rectangular shape. For example, the shape of the edge of the hole 122 may also be a circular shape.

[0028] A plurality of vibrators 130 are fixed to the back surface 111 of the first plate 110. For example, the same number of vibrators 130 as the number of seats 3 arranged on the bottom surface 22 of the vehicle interior 2 may be fixed to the back surface 111 of the first plate 110.

[0029] Holes 122 corresponding to the vibrators 130 are provided at multiple locations of the second plate 120. The holes 122 are arranged so that their edges do not overlap each other in a plan view. A vibration damping part 140 formed by integrally fixing the first plate 110 and the second plate 120 is provided between the holes 122.

[0030] The vibrator 130 vibrates the first plate 110 in the out-of-plane direction thereof to generate sound based on the input from the control device 12. One side of the first plate 110 in the out-of-plane direction is opposite to the seat 3. The vibrator 130 mainly vibrates the range of the first plate 110 surrounded by the edge of the hole 122 corresponding to the vibrator 130. For example, the vibrator 130 causes the first plate 110 to generate bending vibration. The bending vibration generated by the vibrator 130 is attenuated at the vibration reduction unit 140. Therefore, even when a plurality of vibrators 130 are fixed to the first plate 110, the bending vibrations generated by each vibrator 130 do not interfere with each other.

[0031] The connection portion 21 is connected to the vibration damping portion 140 of the display device 10. Depending on the method of connecting the connection portion 21 to the vibration damping portion 140, the ability of the vibration damping portion 140 to attenuate bending vibration can be improved.

[0032] Alternatively, the control device 12 projects an image from the projection device 11 onto the projection surface 100 of the display device 10, and generates vibrations matching the image from the vibrator 130. For example, the control device 12 may perform projection such that the image projected onto the projection surface 100 is vibrated by the vibrations generated by the vibrator 130. Furthermore, the control device 12 may perform projection such that a sound corresponding to the image projected onto the projection surface 100 is emitted by the vibrations generated by the vibrator 130.

[0033] (Effect)

[0034] As described above, according to the display device 10 of the present embodiment, the following effects can be obtained.

[0035] The display device 10 includes a first plate 110, a vibrator 130, and a second plate 120. An image is projected from a projection device 11 disposed inside the mobile body 1 toward a projection surface 100 disposed on the front side of the first plate 110. The vibrator 130 is fixed to the back side 111 of the first plate 110, and emits sound by vibrating the first plate 110. The second plate 120 is fixed to the first plate 110 in such a manner that its front side 121 faces the back side 111 of the first plate 110. A hole 122 is provided on the front side 121 of the second plate 120, and the vibrator 130 is disposed inside the hole 122. According to the above structure, sound is emitted by vibrating the first plate 110 having the projection surface 100. By emitting sound from the surface on which the image is projected, it is possible to perform projection in which sound and image are integrated.

[0036] In the display device 10, a plurality of vibrators 130 are arranged on the back surface 111 side of the first plate 110. A plurality of holes 122 corresponding to the plurality of vibrators 130 are provided in the second plate 120. When viewed from above, the edges of the plurality of holes 122 do not overlap with each other, and a vibration damping portion 140 formed by fixing the second plate 120 to the first plate 110 is provided between the plurality of holes 122. According to the above structure, the edges of the plurality of holes 122 are arranged so as not to overlap with each other, and the vibration damping portion 140 is provided between the plurality of holes 122, so that the vibrations generated by the plurality of vibrators 130 can be suppressed from interfering with each other.

[0037] In the display device 10, the second plate 120 is formed of a material having a higher vibration damping capability than the first plate 110. For example, the second plate 120 is formed of an iron plate, and the first plate 110 is formed of a fibrous material. According to the above structure, the vibration damping unit 140 formed by fixing the second plate 120 to the first plate 110 has a higher vibration damping capability, and can suppress the vibrations generated by the plurality of vibrators 130 from interfering with each other.

[0038] In the display device 10, the projection plane 100 faces the seat 3 provided in the moving body 1 for the passenger to sit on, and the out-of-plane side of the first plate 110 having the projection plane 100 also faces the seat 3. Therefore, both sound and image can be clearly output to the passenger.

[0039] The vibrator 130 of the display device 10 causes the first plate 110 to vibrate in accordance with the input from the control device 12, and the control device 12 controls the projection device 11 to project an image. According to the above structure, by controlling the sound and the image with a single control device, it is possible to easily perform a projection in which the sound and the image are integrated.

[0040] (Variation Example)

[0041] In the above embodiment, the display device 10 has a plurality of vibrators 130 fixed to the back surface 111 of the first plate 110. However, the number of vibrators 130 fixed to the back surface 111 of the first plate 110 may be one. Alternatively, the display device 10 may be provided with one vibrator 130 for each seat 3 of the mobile body 1.

[0042] In the above embodiment, the case where the first plate 110 is a single plate is described, but the first plate 110 may be divided into a plurality of parts. For example, the first plate 110 may be divided into a plurality of parts to match the shape of the ceiling 20 of the vehicle room 2, and may be divided into a plurality of parts for each vibrator 130 fixed to the back side 111 thereof. The plurality of parts constituting the first plate 110 may be configured with gaps between each other. Thus, it is possible to suppress the interference between the vibration generated in each part and the vibration generated in other parts. In addition, in the above embodiment, the case where the second plate 120 is a single plate is described, but the second plate 120 may be divided into a plurality of parts. For example, the second plate 120 may be divided into a plurality of parts to match the shape of the ceiling 20 of the vehicle room 2, and may be divided into a plurality of parts for each hole 122 provided on the front side 121. The plurality of parts constituting the second plate 120 may be configured with gaps between each other. Thus, it is possible to suppress the interference between the vibration generated in each part and the vibration generated in other parts. Only one of the first plate 110 and the second plate 120 may be divided into a plurality of locations, or both of the first plate 110 and the second plate 120 may be divided into a plurality of locations.

[0043] In the above-mentioned embodiment, the display device 10 is connected to the ceiling 20 of the vehicle interior 2 by means of the connection portion 21. However, the connection target of the display device 10 is not limited to the ceiling 20 of the vehicle interior 2. For example, the display device 10 may be connected to the seat 3, the inner side surface of the vehicle interior 2, the bottom surface 22, etc. In addition, the display device 10 may be connected to the ceiling 20 without the connection portion 21. For example, in the case where the ceiling 20 of the vehicle interior 2 is stepped, the display device 10 may be directly connected to each step of the ceiling 20.

[0044] In the above embodiment, the hole 122 provided in the second plate 120 penetrates from the front surface 121 of the second plate 120 toward the connecting surface 101. However, the hole 122 does not need to penetrate if the hole 122 has a volume inside thereof to accommodate the vibrator 130. In addition, a sound absorbing structure may be provided on the side of the first plate 110 opposite to the ceiling 20 in the out-of-plane direction to suppress the diffusion of sound.

[0045] The present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. Embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the protection scope of the present disclosure.

[0046] 〔Summarize〕

[0047] The display device of scheme 1 of the present disclosure includes: a first plate having a projection surface on the front side, and an image is projected toward the projection surface of the first plate from a projection device arranged inside a movable body; a vibrator, which is fixed to the back side of the first plate and produces sound by vibrating the first plate; and a second plate, which is fixed to the first plate in a manner that the front side is opposite to the back side of the first plate, and a hole is provided on the front side of the second plate, and the vibrator is arranged on the inner side of the hole.

[0048] With regard to the display device of Scheme 2 of the present disclosure, on the basis of the display device of Scheme 1 above, a plurality of vibrators are arranged on the back side of the first plate, a plurality of holes corresponding to the plurality of vibrators are provided on the second plate, edges of the plurality of holes do not overlap with each other when viewed from above, and a vibration damping portion formed by fixing the second plate to the first plate is provided between the plurality of holes.

[0049] The display device according to claim 3 of the present disclosure is based on the display device according to claim 2, wherein the second plate member is formed of a material having a higher vibration damping capability than the first plate member.

[0050] For the display device of scheme 4 of the present disclosure, on the basis of any one of the above schemes 1 to 3, the projection surface is opposite to a seat for passengers to sit on provided on the moving body, and one side in the out-of-plane direction of the first plate vibrated by the vibrator is opposite to the seat.

[0051] The display device of scheme 5 of the present disclosure is, based on any one of schemes 1 to 4, wherein the vibrator causes the first plate to vibrate in accordance with an input from a control device, and the control device controls the projection device to project an image.

Claims

1. A display device, wherein: The display device comprises: A first plate having a projection surface on the front side, and an image is projected toward the projection surface of the first plate from a projection device provided inside the movable body; a vibrator fixed to the back side of the first plate and causing the first plate to vibrate to generate sound; and a second plate, the second plate being fixed to the first plate in such a manner that the front side of the second plate faces the back side of the first plate, A hole is provided on the front side of the second plate. The vibrator is arranged inside the hole.

2. The display device according to claim 1, wherein: The vibrator is arranged in plurality on the back side of the first plate. The second plate is provided with a plurality of holes corresponding to the plurality of vibrators respectively. When viewed from above, the edges of the plurality of holes do not overlap each other. A vibration damping portion is provided between the plurality of holes, wherein the second plate member is fixed to the first plate member.

3. The display device according to claim 2, wherein: The second plate member is formed of a material having a higher vibration damping capability than that of the first plate member.

4. The display device according to claim 1, wherein: The projection surface is opposite to a seat provided on the moving body for a passenger to sit on. And one side of the first plate vibrated by the vibrator in the out-of-plane direction faces the seat.

5. The display device according to claim 1, wherein: The vibrator causes the first plate to vibrate in accordance with an input from a control device, and the control device controls the projection device to project an image.

Images