Indication device

Abstract

A display apparatus (1) is provided with a display panel (2), an actuator (4) provided so as to be in contact with a back surface (2b) of the display panel (2), and a woofer (5) provided to emit sound waves from behind the display panel (2) toward the back surface (2b) of the display panel (2).

Description

[Technical Field]

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

[0002] For example, Patent Document 1 discloses a display device including a display panel and an actuator and a woofer provided behind the display panel, the actuator and the woofer being used to generate sound waves. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 123288 Summary of the Invention [Problem to be solved by the invention]

[0004] A phase shift can occur between the sound waves generated by the actuator and the woofer, resulting in poor sound quality.

[0005] One aspect of the present disclosure provides a display device capable of suppressing deterioration in sound quality. [Means for solving the problem]

[0006] A display device according to one aspect of the present disclosure includes a display panel, an actuator arranged to contact the rear surface of the display panel, and a woofer arranged to generate sound waves from behind the display panel toward the rear surface of the display panel. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is an exploded perspective view showing an example of a schematic configuration of a display device according to an embodiment. [Figure 2] FIG. 1 is an exploded perspective view showing an example of a schematic configuration of a display device. [Figure 3] FIG. 1 is a front view showing an example of a schematic configuration of a display device. [Figure 4] FIG. 2 is a rear view showing an example of a schematic configuration of a display panel including an enclosure. [Figure 5] FIG. 1 is a front view showing an example of a schematic configuration of a back chassis including an enclosure. [Figure 6] FIG. 2 is a partial rear view showing an example of a schematic configuration of a back chassis. [Figure 7] FIG. 2 is a partial rear view showing an example of a schematic configuration of a back chassis on which an actuator and a woofer are provided. [Figure 8] FIG. 2 is a partially enlarged view showing an example of the schematic configuration of a woofer attached to a back chassis. [Figure 9] 3 is a partial cross-sectional view schematically showing an example of the path of a sound wave generated by a woofer. FIG. [Figure 10] FIG. 2 is a rear view showing an example of a schematic configuration of the display device. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following embodiments, the same components are designated by the same reference numerals, and redundant description will be omitted.

[0009] The present disclosure will be described in the following order: 1. Introduction 2. Embodiment 3.Effects

[0010] 1. Introduction In display devices equipped with a display panel such as an OLED cell, an actuator and a woofer are often used to generate sound waves. For example, the actuator vibrates the display panel, generating mid- to high-frequency sound waves. The woofer's diaphragm vibrates, generating mid- to low-frequency sound waves (air compression waves).

[0011] The woofer is installed behind the display panel for reasons such as making the bezel appear thinner when the display device is viewed from the front. Conventionally, the woofer has been installed to generate sound waves in directions other than the front (rear, side, etc.) so that the sound generated by the woofer would wrap around the display panel and reach the front. In this case, the following problems can arise.

[0012] A phase shift occurs between the sound waves generated by the actuator and the woofer. As a result, sound degradation (deterioration in sound quality) occurs due to changes in the phase components of the original sound. While it is possible to correct the phase shift using signal processing, it is often difficult to achieve sufficient phase alignment.

[0013] The woofer needs to be placed close to the edge of the screen (the edge of the display panel) so that the sound waves generated by the woofer can easily reach the front of the display panel. In this case, the size (volume) of the rear cover that covers the woofer and other components becomes larger than when the woofer is placed near the center of the screen.

[0014] When wall-mounted, the display must be placed at a certain distance from the wall to prevent the sound waves generated by the woofer from being blocked by the wall. This means that the display device cannot be placed in close contact with the wall. It is also necessary to place the woofer away from the wall-mount bracket to prevent it from being covered by the wall-mount bracket. This also creates the problem of an increased rear cover size.

[0015] According to the disclosed technology, the woofer (e.g., a diaphragm thereof) is arranged to generate sound waves toward the display panel. As a result, the sound waves generated by the woofer propagate to the display panel, causing the display panel to vibrate. In one embodiment, a hole is provided in the back chassis located between the display panel and the woofer. As a result, the sound waves generated by the woofer propagate through the air to the display panel. As the display panel vibrates, sound waves (substantially) identical to the sound waves generated by the woofer are generated toward the front of the display panel. Because the actuator and the woofer vibrate the same display panel, the phases of the sound waves generated by the actuator and the sound waves generated by the woofer tend to align. Therefore, the deterioration in sound quality due to the phase shift mentioned above is suppressed.

[0016] Because the sound waves generated by the woofer travel forward through the display panel, it is no longer necessary to route the sound waves around. There is no need to place the woofer close to the edge of the screen or away from the wall when wall-mounted. This increases the flexibility of the woofer layout and also prevents the rear cover from becoming larger.

[0017] Since sound waves are generated forward from the position of the display panel 2 corresponding to the woofer, sound localization is stronger than when sound waves are routed around. Since it is less affected by the distance from the wall, stable sound quality can be obtained regardless of the installation environment.

[0018] In one embodiment, some of the sound waves generated by the woofer may be redirected. For example, a sound path or opening may be provided to propagate the sound waves generated by the woofer along a path different from the hole in the back chassis. This makes it easier to ensure the desired sound pressure and playback frequency band compared to using only the sound waves generated by the woofer vibrating the display panel.

[0019] In one embodiment, the enclosure separates the display panel into a vibration area for the left and right actuators and a vibration area for the woofer. By making each vibration area independent of the other (areas that can vibrate independently), the stereo sound effect can be maintained.

[0020] 2. Embodiment A display device according to an embodiment will be described with reference to Figs. 1 to 10. In the drawings, an XYZ coordinate system is shown. The X-axis and Y-axis directions correspond to the horizontal and vertical directions (width and height directions) of the display device. The Z-axis direction corresponds to the front-to-rear direction (thickness direction) of the display device. The positive Z-axis direction corresponds to the front direction of the display device.

[0021] 1 and 2 are exploded perspective views showing an example of the schematic configuration of a display device. The display device 1 includes a display panel 2, an enclosure EC (FIG. 2), a back chassis 3, an actuator 4, a woofer 5, and a rear cover 6. In this example, the actuator 4 includes a pair of actuators 4L and 4R. The actuator 4L is located on the left side (the negative X-axis direction), and the actuator 4R is located on the right side (the positive X-axis direction). The enclosure EC is illustrated mounted on the back chassis 3. The front and back surfaces of the display panel 2 are illustrated as front surface 2a and rear surface 2b. The front and back surfaces of the back chassis 3 are illustrated as front surface 3a and rear surface 3b. The inner and outer surfaces of the rear cover 6 are illustrated as inner surface 6a and outer surface 6b.

[0022] The display panel 2 has a form (thickness, flexibility, etc.) that allows it to vibrate so as to generate and propagate sound waves. An example of such a display panel 2 is an OLED (Organic Light Emitting Diode) cell. The outer frame of the display panel 2 is referred to as a bezel B and is illustrated. No other elements such as a woofer 5 are provided on the bezel B, and the bezel B is designed to be significantly thinner than the rest of the display panel 2.

[0023] Fig. 3 is a front view showing an example of a schematic configuration of a display device. As shown in Fig. 3, the front surface 2a of the display panel 2 mainly constitutes the appearance of the display device 1 when viewed from the front. As mentioned above, the bezel B of the display panel 2 appears to be quite thin.

[0024] 1 and 2 (particularly FIG. 2), the enclosure EC will be described. The enclosure EC is a partition member that separates the display panel 2 so that multiple independent vibration regions are formed in the display panel 2. The enclosure EC fixes the boundary portions between the multiple vibration regions on the rear surface 2b of the display panel 2 to the back chassis 3. The enclosure EC is, for example, an adhesive member. An example of the adhesive region is double-sided tape with cushioning properties (elasticity). The enclosure EC may have a thickness (length in the Z-axis direction) of several millimeters or less. In this example, the enclosure EC is double-sided tape with one side in contact with the rear surface 2b of the display panel 2 and the other side in contact with the front surface 3a of the back chassis 3.

[0025] FIG. 4 is a rear view showing an example of the schematic configuration of a display panel including an enclosure. In the figure, the enclosure EC is indicated by hatching. In the example shown in FIG. 4, the enclosure EC is provided on the rear surface 2b of the display panel 2 so that vibration regions R1L, R1R, and R2 are formed on the display panel 2. The enclosure EC is provided to surround each of these vibration regions R1L, R1R, and R2. A portion of the enclosure EC is located in a boundary region between adjacent vibration regions. By fixing the boundary region to the back chassis 3 via the enclosure EC, the transmission of vibration between the vibration regions is blocked. This allows the vibration regions R1L, R1R, and R2 to vibrate independently.

[0026] Although details will be described later, the vibration area R1L and the vibration area R1R are first vibration areas (a pair of first vibration areas) vibrated by the actuator 4L and the actuator 4R. The vibration area R2 is a second vibration area vibrated by the woofer 5.

[0027] 1 and 2, the back chassis 3 will be described. The back chassis 3 is provided behind the display panel 2. The back chassis 3 supports the display panel 2 from behind the display panel 2. An example of the material of the back chassis 3 is a metal such as aluminum. In this example, the back chassis 3 has a plate shape with an area approximately equal to that of the display panel 2, except for a pair of chassis stands S provided at the bottom. This allows the display panel 2 to be firmly supported over the entire surface.

[0028] 5 is a front view showing an example of a schematic configuration of the back chassis including the enclosure. For ease of understanding, reference numerals are indicated at positions corresponding to the vibration regions R1L, R1R, and R2 of the display panel 2 described above. The enclosure EC is provided on the front surface 3a of the back chassis 3 so that the vibration regions R1L, R1R, and R2 are formed in the display panel 2.

[0029] 6 is a partial rear view showing an example of a schematic configuration of the back chassis 3. As shown in FIGS. 5 and 6, the back chassis 3 includes an opening 34 and an opening 35. The opening 34 and the opening 35 expose a part of the back surface 2b of the display panel 2.

[0030] The openings 34 are provided corresponding to the actuators 4. As described above, the actuators 4 include the actuators 4L and 4R, and therefore the openings 34 include an opening 34L corresponding to the actuators 4L and an opening 34R corresponding to the actuators 4R.

[0031] The opening 35 is provided corresponding to the woofer 5. In this example, the opening 35 includes a plurality of holes 35a. The holes 35a are provided so as to penetrate the back chassis 3 by, for example, punching.

[0032] 1 and 2, the actuator 4 and the woofer 5 will be described. The actuator 4 and the woofer 5 are used to generate sound waves. By using both the actuator 4 and the woofer 5, a wider range of sound can be obtained than when using only one of them. For example, the woofer 5 is configured to generate sound waves at frequencies (e.g., mid-low range frequencies) that are lower than at least the vibration frequency of the actuator 4 (e.g., mid-high range frequencies). The woofer 5 is also called a subwoofer, etc.

[0033] The actuator 4 is provided so as to be in contact with the rear surface 2b of the display panel 2. The actuator 4 is provided so that at least a portion of the actuator 4 is located within an opening 34 of the back chassis 3. The woofer 5 is provided so as to generate sound waves from behind the display panel 2 toward the rear surface 2b of the display panel 2. The woofer 5 is provided so as to face the rear surface 2b of the display panel 2 via an opening 35 of the back chassis 3. The actuator 4 and the woofer 5 will be described with reference to FIG. 7 as well.

[0034] FIG. 7 is a partial rear view showing an example of the schematic configuration of a back chassis provided with an actuator and a woofer. With particular reference to FIGS. 1 and 7, in this example, the woofer 5 is located at the center of the display panel 2 in the horizontal direction. The actuator 4L and the actuator 4R are located on opposite sides of the center of the display panel 2 (with the woofer 5 in between). The actuator 4L is located to the left of the center of the display panel 2. The actuator 4R is located to the right of the center of the display panel 2. In other words, the woofer 5 is located between the actuators 4R and 4L. In the vertical direction, the actuators 4L, 4R, and the woofer 5 are located slightly above the center of the display panel 2 (toward the positive Y-axis direction). However, in the vertical direction, the actuators 4L, 4R, and the woofer 5 may be located at or below the center of the display panel 2.

[0035] The actuator 4L includes a vibrating unit 41L and a housing 42L. The vibrating unit 41L comes into contact with the rear surface 2b of the display panel 2 and vibrates a vibration region R1L of the display panel 2. The housing 42L is attached to the back chassis 3 so that at least a portion of the vibrating unit 41L is located within the opening 34L of the back chassis 3. The attachment is performed by screwing or the like. For example, the actuator 4L provided in this manner can vibrate the vibration region R1L of the display panel 2.

[0036] The actuator 4R includes a vibrating unit 41R and a housing 42R. The vibrating unit 41R comes into contact with the rear surface 2b of the vibration region R1R of the display panel 2, and vibrates the vibration region R1R of the display panel 2. The housing 42R is attached to the back chassis 3 so that at least a portion of the vibrating unit 41R is located within the opening 34R of the back chassis 3. For example, the actuator 4R provided in this manner can vibrate the vibration region R1R of the display panel 2.

[0037] The woofer 5 includes a speaker unit 51 and a housing 52. The speaker unit 51 includes a diaphragm that vibrates to generate sound waves in a predetermined direction. The housing 52 is attached to the back chassis 3 so that the diaphragm of the speaker unit 51 generates sound waves toward the rear surface 2b of the vibration region R2 of the display panel 2 through the opening 35 of the back chassis 3. The diaphragm of the speaker unit 51 of the woofer 5 is spaced apart from the rear surface 2b of the display panel 2. The distance between them may correspond to the depth (length in the Z-axis direction) of the hole 35a of the opening 35. The sound waves generated by the woofer 5 are propagated through the air to the rear surface 2b of the display panel 2 through the opening 35. For example, the woofer 5 thus provided can vibrate the vibration region R2 of the display panel 2.

[0038] The woofer 5 will be further described with reference to Fig. 8. Fig. 8 is a partially enlarged view showing an example of the schematic configuration of the woofer attached to the back chassis.

[0039] The housing 52 of the woofer 5 has a duct 52a. The duct 52a guides some of the sound waves generated by the woofer 5 (by vibration of the diaphragm of the speaker unit 51) in a direction other than the direction toward the rear surface 2b of the display panel 2 (positive direction of the Z axis). In this example, the ducts 52a have openings at the top of the housing 52 so as to guide some of the sound waves upward (positive direction of the Y axis), and are multiple ducts provided at both ends of the housing 52. The ducts 52a have, for example, a tubular shape extending in the vertical direction. A structure including such ducts 52a is also called a bass reflex speaker structure.

[0040] In addition to the actuator 4 and woofer 5 described above, various other elements (not shown) may be provided on the rear surface 3b of the back chassis 3. Examples of the other elements include a control circuit board for the display panel 2.

[0041] 1 and 2, the rear cover 6 will be described. The rear cover 6 covers elements provided on the rear surface 3b of the back chassis 3 from behind so that these elements are housed between the back chassis 3 and the rear cover 6. The rear cover 6 covers at least the woofer 5 from behind, and in the illustrated example, covers the actuator 4 and the woofer 5. The rear cover 6 may have a box shape with an opening at least on the back chassis 3 side. Of the four side walls constituting the box shape, the upper side wall is referred to as a side wall 61 and is illustrated. A slit 61a is formed in the side wall 61. The slit 61a is one form of an opening that outputs some of the sound waves guided by the duct 52a of the woofer 5 and the space between the woofer 5 and the back chassis 3 to the outside of the rear cover 6. The space between the woofer 5 and the back chassis 3 is formed, for example, by providing a member M (FIG. 9) described below so as to fill the gap between the woofer 5 and the back chassis 3.

[0042] 9 is a partial cross-sectional view showing an example of the path of sound waves generated by a woofer. The direction of sound wave propagation is shown by white arrows. The display panel 2 and the back chassis 3 are separated by an enclosure EC (not shown in FIG. 9) by, for example, about 0.9 mm, which ensures a vibration space for the display panel 2.

[0043] The sound waves generated by the woofer 5 (by vibration of the diaphragm of the speaker unit 51) mainly pass through the holes 35a of the opening 35 and reach the rear surface 2b of the display panel 2. This causes the display panel 2 (vibration region R2 thereof) to vibrate, generating sound waves that are substantially the same as the sound waves generated by the woofer 5 and traveling forward toward the front of the display panel 2. Although not shown in FIG. 9, sound waves generated by the actuator 4 also travel forward toward the front of the display panel 2. Therefore, the phases of the sound waves generated by the actuator 4 and the sound waves generated by the woofer 5 tend to align at a position in front of the display panel 2.

[0044] Some of the sound waves generated by the woofer 5 pass through the duct 52a and slit 61a described above and are output to the outside of the rear cover 6. In the example shown in FIG. 9, a member M (e.g., a cushioning member) is provided between the woofer 5 and the back chassis 3, thereby forming a space between the woofer 5 and the back chassis 3. Some of the sound waves generated by the woofer 5 are also output through this space. Some of the output sound waves go around the display panel 2 and head forward. This also causes the sound waves to head forward of the display panel 2. By providing a separate path for the sound waves generated by the woofer 5 in this way, it becomes easier to ensure the sound pressure, playback band, etc.

[0045] Fig. 10 is a rear view showing an example of a schematic configuration of the display device 1. As shown in Fig. 10, the outer surface 6b of the rear cover 6 mainly constitutes the appearance of the display device 1 when viewed from the rear.

[0046] Although the embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present disclosure. Furthermore, components of different embodiments and modifications may be combined as appropriate.

[0047] 3.Effects The display device 1 described above can be explained, for example, as follows: As described with reference to Figures 1 and 2, the display device 1 includes a display panel 2 (e.g., an OLED cell), an actuator 4 provided so as to be in contact with a rear surface 2b of the display panel 2, and a woofer 5 provided so as to generate sound waves from behind the display panel 2 toward the rear surface 2b of the display panel 2.

[0048] According to the display device 1, sound waves generated by the woofer 5 vibrate the display panel 2. By vibrating the same display panel 2 using both the actuator 4 and the woofer 5, the phase of the sound waves generated by the actuator 4 and the phase of the sound waves generated by the woofer 5 tend to align. This makes it possible to suppress deterioration in sound quality due to a phase shift between the two sound waves.

[0049] 1, 2, 5, and 6, the display device 1 includes a back chassis 3 that supports the display panel 2 from behind the display panel 2, and the back chassis 3 has an opening 35 (e.g., a plurality of holes 35a) that exposes a part of the back surface 2b of the display panel 2. The woofer 5 may be provided to face the back surface 2b of the display panel 2 through the opening 35 of the back chassis 3. This allows sound waves generated by the woofer 5 to propagate through the air to the back surface 2b of the display panel 2 through the opening 35.

[0050] As described with reference to FIGS. 1, 2, 7 to 9, etc., the woofer 5 may include a diaphragm (inside the speaker unit 51) that vibrates to generate sound waves in a predetermined direction, and a housing 52 having a duct 52a that guides some of the sound waves generated by the diaphragm in a direction other than the direction toward the rear surface 2b of the display panel 2 (the positive direction of the Z axis). The display device 1 also includes a rear cover that covers at least the woofer 5 from behind, and the rear cover 6 may have an opening (slit 61a) that outputs some of the sound waves guided by the duct 52a to the outside of the rear cover 6. This allows the sound waves generated by the woofer 5 to be output forward even through a path other than the opening 35. As a result, for example, sound pressure, playback band, and the like can be more easily ensured than when only sound waves generated by the vibration of the display panel 2 by the woofer 5 are used.

[0051] As described with reference to FIGS. 2, 4, and 5, the display device 1 includes an enclosure EC (partition member) that partitions the display panel 2 so that a plurality of independent vibration regions are formed on the display panel 2. The plurality of vibration regions may include a first vibration region (vibration region R1L and vibration region R1R) that vibrates due to an actuator 4 and a second vibration region (vibration region R2) that vibrates due to sound waves generated by a woofer 5. The enclosure EC may be an adhesive member that fixes the boundary between the plurality of vibration regions on the rear surface 2b of the display panel 2 to the back chassis 3. The actuators 4 are a pair of actuators 4L and 4R provided on both sides of the central portion of the display panel 2, and the first vibration region may include a pair of first vibration regions (vibration region R1L and vibration region R1R), each vibrating due to a corresponding actuator of the pair of actuators 4L and 4R. The woofer 5 may be located between the pair of actuators 4L and 4R. By generating sound waves through the vibration of each of these vibration areas, the stereo effect of the sound can be prevented from being lost.

[0052] The woofer 5 may generate sound waves at a frequency lower than at least the vibration frequency of the actuator 4. This makes it possible to generate sound waves in a wider overall range than when, for example, only the actuator 4 is used.

[0053] The effects of the embodiments described in this specification are merely examples and are not limiting, and other effects may also be provided.

[0054] In the above embodiment, an example has been described in which the panel 21 of the display panel 2 is an OLED cell. However, this is not limited to an OLED cell, and any display panel that can be vibrated by the actuator 4 and by sound waves generated by the woofer 5 may be used.

[0055] In the above embodiment, an example has been described in which the opening 35 has a plurality of holes 35a. However, the number of holes may be one, and the shape of the hole is not limited to the example shown in the drawings.

[0056] In the above embodiment, the actuator 4 is described as a pair of actuators 4L and 4R arranged on both sides of the woofer 5. However, the number of actuators may be one or more. Furthermore, in the above embodiment, a single woofer 5 is arranged in the center of the display panel 2. However, two or more woofers may be provided. For example, a pair of woofers for the left and right channels may be provided on both sides of the center of the display panel 2. When different numbers and arrangements of actuators and / or woofers are provided, the enclosure EC may be arranged to separate vibration regions corresponding to the actuators and / or woofers. This can provide a stereo sound effect over a wider frequency range, for example. This advantage is particularly apparent when the screen size of the display panel 2 is large and multiple vibration regions can be formed.

[0057] In the above embodiment, an example has been described in which some of the sound waves generated by the woofer 5 are guided upward by the duct 52a of the housing 52 of the woofer 5. However, the duct may be provided to guide some of the sound waves in any direction other than forward. The number of ducts is not limited to the example shown in the drawings. The same applies to the slits 61a of the rear cover 6. In other words, slits may be formed in parts of the rear cover 6 other than the side wall portions 61.

[0058] The present technology can also be configured as follows. (1) A display panel; an actuator provided to contact the rear surface of the display panel; a woofer provided behind the display panel to generate sound waves toward the rear surface of the display panel; Equipped with Display device. (2) a back chassis supporting the display panel from behind the display panel; the back chassis has an opening that exposes a part of the back surface of the display panel, the woofer is provided so as to face the back surface of the display panel through the opening in the back chassis. The display device according to (1). (3) the opening includes a plurality of holes; The display device according to (2). (4) The woofer is a diaphragm that vibrates to generate the sound waves in a predetermined direction; a housing having a duct for guiding a part of the sound waves generated by the diaphragm in a direction other than the direction toward the rear surface of the display panel; Including, The display device according to (2) or (3). (5) a rear cover that covers at least the woofer from behind; the rear cover has an opening for outputting the part of the sound waves guided by the duct to the outside of the rear cover. (4) The display device according to (4). (6) a partition member that partitions the display panel so that a plurality of independent vibration regions are formed on the display panel; The plurality of vibration regions are a first vibration area vibrated by the actuator; a second vibration area that vibrates due to sound waves generated by the woofer; Including, The display device according to any one of (1) to (5). (7) the partition member is an adhesive member that fixes boundary portions between the plurality of vibration regions on the rear surface of the display panel to a back chassis that supports the display panel from the rear surface. (6) The display device according to (6). (8) the actuator is a pair of actuators provided on both sides of a central portion of the display panel, the first vibration region includes a pair of first vibration regions each vibrated by a corresponding one of the pair of actuators; The display device according to (6) or (7). (9) The woofer is located between the pair of actuators. (8) The display device according to (8). (10) The woofer generates sound waves at a frequency lower than at least the vibration frequency of the actuator. The display device according to any one of (1) to (9). (11) The display panel is an OLED cell. The display device according to any one of (1) to (10). [Explanation of symbols]

[0059] 1 Display device 2 Display panel 3 Back Chassis 4 Actuators 5 Woofer 6 Rear cover 34 Opening 35 Opening 35a hole 52 Case 52a Duct 61a Slit (opening) EC Enclosure (Partition Material) M member R1L vibration area R1R vibration area R2 vibration area

Claims

1. A display panel; an actuator provided to contact the rear surface of the display panel; a woofer provided behind the display panel to generate sound waves toward the rear surface of the display panel; a back chassis supporting the display panel from behind the display panel; Equipped with the back chassis has an opening that exposes a part of the back surface of the display panel, the woofer is provided to face the back surface of the display panel through the opening of the back chassis, the opening includes a plurality of holes; Display device.

2. The woofer is a diaphragm that vibrates to generate the sound waves in a predetermined direction; a housing having a duct for guiding a part of the sound waves generated by the diaphragm in a direction other than the direction toward the rear surface of the display panel; Including, The display device according to claim 1 .

3. a rear cover that covers at least the woofer from behind; the rear cover has an opening for outputting the part of the sound waves guided by the duct to the outside of the rear cover. The display device according to claim 2 .

4. a partition member that partitions the display panel so that a plurality of independent vibration regions are formed on the display panel; The plurality of vibration regions are a first vibration area vibrated by the actuator; a second vibration area that vibrates with sound waves generated by the woofer; Including, The display device according to claim 1 .

5. the partition member is an adhesive member that fixes a boundary portion between the plurality of vibration regions on the rear surface of the display panel to a back chassis that supports the display panel from the rear surface. The display device according to claim 4 .

6. the actuator is a pair of actuators provided on both sides of a central portion of the display panel, the first vibration region includes a pair of first vibration regions each vibrated by a corresponding one of the pair of actuators; The display device according to claim 4 .

7. The woofer is located between the pair of actuators. The display device according to claim 6.

8. The woofer generates sound waves at a frequency lower than at least the vibration frequency of the actuator. The display device according to claim 1 .

9. The display panel is an OLED cell. The display device according to claim 1 .

Images