JP7804444B2 - Display device and display system - Google Patents

Description

This disclosure relates to a display device and a display system.

Patent Document 1 discloses an image display device having a liquid crystal panel, a diffusion device disposed on the rear side of the liquid crystal panel, and a backlight device disposed on the rear side of the diffusion device. Furthermore, in this image display device, a light-receiving unit that receives infrared signals from a remote controller is disposed on the backlight device on the rear side of the liquid crystal panel, facing the diffusion device. Patent Document 1 states that by disposing the light-receiving unit on the rear side of the liquid crystal panel in this way, there is no need to attach an external light-receiving unit, even if there are restrictions due to a narrow frame.

JP 2016-197801 A

In the image display device of Patent Document 1, in addition to the light source, a light-receiving unit that does not transmit light from the light source is arranged on the surface of the backlight device facing the display panel. This means that some of the light from the light source is blocked by the light-receiving unit, which can cause the liquid crystal panel to become dark near the area facing the light-receiving unit. The present disclosure aims to provide a display device and display system that prevents part of the display panel from becoming dark due to the light-receiving unit.

A display device according to one embodiment of the present disclosure includes a display panel, a light-receiving unit that receives an operation signal from a remote controller, and a backlight device that is provided facing the back surface of the display panel. The backlight device has a backlight chassis, and the light-receiving unit faces an opening formed in the backlight chassis and is provided facing the back surface, which is one of the two main surfaces of the backlight chassis that is farther from the display panel.

FIG. 1 is a schematic diagram of a display system 1 showing a front view of a display device 5 according to an embodiment. FIG. 2 is a schematic diagram of a display system showing a cross section of a display device according to an embodiment. FIG. 3 is a plan view of the backlight device according to the embodiment. FIG. 4 is a schematic diagram of a display system showing a cross section of a display device according to a first modification of the embodiment. FIG. 5 is a schematic diagram of a display system showing a cross section of a display device according to a second modification of the embodiment. FIG. 6 is a schematic diagram of a display system showing a cross section of a display device according to a third modification of the embodiment. FIG. 7 is a plan view of a backlight device according to a fourth modification of the embodiment.

The embodiment and each modified example described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiment and each modified example. Various modifications other than these embodiment and each modified example are possible depending on the design, etc., as long as they do not deviate from the technical concept of the present disclosure.

[Embodiment]
An overview of a display system 1 according to an embodiment will be described using Figures 1 and 2. Figure 1 is a schematic diagram of the display system 1 according to an embodiment, showing the front of a display device 5. Figure 2 is a schematic diagram of the display system 1 according to an embodiment, showing a cross section of the display device 5. As shown in Figures 1 and 2, the display system 1 includes a remote controller 2 and a display device 5. The remote controller 2 remotely operates the display device 5 by transmitting to the display device 5 an operation signal 3 on which information indicating the operation content according to an operation from a user is superimposed. An example of the operation signal 3 transmitted from the remote controller 2 to the display device 5 is an infrared signal on which information indicating the operation content of the user is superimposed on infrared light.

The display device 5 includes a display panel 10, a backlight device 20, a light-receiving member 30, a signal processing member 35, an insert member 40, and a housing 60. Note that the display device 5 may be configured without the insert member 40.

The display device 5 is an electronic device capable of displaying various images, such as still images and moving images. The display device 5 receives an operation signal 3 transmitted from the remote controller 2 and performs various operations in response to the received operation signal 3, such as turning the power on or off and changing the image being displayed. As an example, the display device 5 will be described as a television receiver, but the display device 5 is not limited to a television receiver and may be any device capable of displaying various images, such as still images and moving images.

As will be described in more detail below, in the display device 5, the light-receiving member 30 that receives the operation signal 3 transmitted from the remote controller 2 is located behind the display panel 10 and backlight device 20. The light-receiving member 30 receives the operation signal 3 that has passed through the display panel 10 and backlight device 20.

The housing 60 is a protective member that houses and protects the display panel 10, backlight device 20, light receiving member 30, signal processing member 35, and insert member 40. An opening is formed in the area of the housing 60 that faces the display area DA of the image on the display panel 10. For example, the housing 60 can be formed using a resin material, but materials other than resin may also be used to form the housing 60.

The display panel 10 is capable of displaying an image. The display panel 10 also transmits an operation signal 3 from the remote controller 2. An example of a display panel 10 is a liquid crystal display panel. The display panel 10 has an image display area DA and a frame-shaped non-display area ND that surrounds the display area DA. A plurality of pixels are arranged in a matrix in the display area DA of the display panel 10. The non-display area ND is an area where no image is displayed because it is provided with circuits and wiring that control the driving of each of the plurality of pixels, and faces the housing 60 in a frame-like manner. The non-display area ND is also called a frame area.

The backlight device 20 is provided facing the back surface 10b, which is one of the two main surfaces of the display panel 10 opposite the front surface 10a. The backlight device 20 illuminates the display panel 10 from the back surface 10b. The light emitted by the backlight device 20 passes through each of the multiple pixels, the transmittance of which has been adjusted, thereby displaying an image in the display area DA of the display panel 10.

For example, the backlight device 20 has a backlight chassis 21, a reflective sheet 22, multiple light sources 23, multiple support pins 24, and a diffuser plate 25. For example, the backlight device 20 may be configured without the reflective sheet 22. For example, in this embodiment, the backlight device 20 is described as a direct type in which multiple light sources 23 are arranged to face the display panel 10 via the diffuser plate 25, but the backlight device 20 is not limited to a direct type.

The backlight chassis 21 supports a reflective sheet 22, multiple light sources 23, multiple support pins 24, and a diffuser plate 25. The backlight chassis 21 protects the reflective sheet 22, multiple light sources 23, and multiple support pins 24 by housing them inside. The backlight chassis 21 is preferably formed using a metal material to increase rigidity and improve the heat dissipation characteristics of heat generated by heat sources such as the light sources 23. The backlight chassis 21 also has an opening 21h, which is a through-hole that allows the operation signal 3 from the remote controller 2 to pass through.

The reflective sheet 22, the plurality of light sources 23, and the plurality of support pins 24 are provided directly or indirectly via other members on the surface 21a, which is the main surface of the backlight chassis 21 that is closer to the display panel 10.

The reflective sheet 22 reflects light emitted by the multiple light sources 23 toward the diffuser plate 25. The reflective sheet 22 is made of a material or has a shape that easily reflects light emitted by the multiple light sources 23. To increase the reflection efficiency of light emitted by the multiple light sources 23, the reflective sheet 22 is preferably provided over the entire surface 21a of the backlight chassis 21. For example, the reflective sheet 22 can be formed using a white resin material, but is not limited to this. The reflective sheet 22 also has an opening 22h, which is a through-hole that allows the operation signal 3 from the remote controller 2 to pass through. The opening 22h is formed to overlap the opening 21h formed in the backlight chassis 21.

The multiple light sources 23 are, for example, light emitting diodes (LEDs) that emit white light. The multiple light sources 23 are mounted on a light source board (not shown).

The multiple support pins 24 support the diffuser plate 25 with their tops, which are their tips. The tops of the multiple support pins 24 that support the diffuser plate 25 are rounded rather than pointed. Each of the multiple support pins 24 is installed, for example, directly on the surface 21a of the backlight chassis 21 or indirectly via another member. Each of the multiple support pins 24 has a length from the base that contacts the installation surface to the top that allows the diffuser plate 25 to be supported by the top. The length of each of the multiple support pins 24 that allows the diffuser plate 25 to be supported by the top can be, for example, the length at which the top comes into contact with the diffuser plate 25.

Here, the diffusion plate 25 may bend depending on its position, for example, when laid nearly horizontally. Therefore, the length of each of the multiple support pins 24 that allows the top of the head to support the diffusion plate 25 may be the length at which the top of the head comes into contact with the diffusion plate 25 when the diffusion plate 25 is not bent, or the length at which the top of the head comes into contact with the diffusion plate 25 when the diffusion plate 25 is bent. In other words, each of the multiple support pins 24 may be long enough that the top of the head comes into contact with the diffusion plate 25 when the diffusion plate 25 is laid horizontally and the deflection of the diffusion plate 25 is large (the state shown in FIG. 2), but not when the diffusion plate 25 is laid upright and the deflection of the diffusion plate 25 is small.

The multiple support pins 24 are preferably made of a material, shape, or color that easily reflects the light emitted by the multiple light sources 23 toward the diffuser plate 25. For example, each of the multiple support pins 24 can be shaped so that its width gradually narrows from its base to its top. The multiple support pins 24 can also be formed using a white or translucent white resin material. This allows each of the multiple support pins 24 to efficiently reflect the light emitted by the multiple light sources 23 toward the diffuser plate 25. The material, shape, and color of the multiple support pins 24 are not limited to those described above.

The diffuser plate 25 is provided on the backlight chassis 21. For example, the diffuser plate 25 is provided opposite the backlight chassis 21, and the end of the back surface is supported by the backlight chassis 21 in a frame shape. The diffuser plate 25 is disposed opposite the back surface 10b of the display panel 10. The diffuser plate 25 diffuses and transmits light emitted by the multiple light sources 23. In this way, the diffuser plate 25 diffuses the light emitted by the multiple light sources 23, and the backlight device 20 functions as a surface light source that illuminates the display panel 10 in a planar manner. The diffuser plate 25 also transmits the operation signal 3 from the remote controller 2. The diffuser plate 25 may be of any material as long as it is capable of transmitting and diffusing light emitted by the multiple light sources 23 and transmitting the operation signal 3 from the remote controller 2.

The light-receiving member 30 has a light-receiving unit 31 and a light-receiving board 32, which is a circuit board on which the light-receiving unit 31 is mounted. The light-receiving unit 31 receives the operation signal 3 from the remote controller 2. For example, the light-receiving unit 31 is an infrared sensor that receives infrared light and outputs an electrical signal corresponding to the intensity of the received infrared light. The light-receiving board 32 outputs an output signal containing information about the operation content superimposed on the operation signal 3 based on the electrical signal output by the light-receiving unit 31. The light-receiving member 30, which includes the light-receiving unit 31 and the light-receiving board 32, is provided behind the display panel 10 and backlight device 20. For example, the light-receiving unit 31 is mounted on the surface of the light-receiving board 32 that faces the backlight chassis 21.

The signal processing member 35 has a signal processing circuit 36 and a signal processing board 37, which is a circuit board on which the signal processing circuit 36 is mounted. The signal processing member 35 is a so-called main board for controlling the driving of the display panel 10 and the backlight device 20. The signal processing circuit 36 is an integrated circuit that outputs control signals for controlling the driving of the display panel 10 and the backlight device 20. The signal processing board 37 outputs output signals for controlling the operation of the display panel 10 and the backlight device 20, respectively, based on the control signals output by the signal processing circuit 36. For example, the signal processing circuit 36 is mounted on the surface of the signal processing board 37 facing the backlight chassis 21.

The signal processing member 35, which includes the signal processing circuit 36 and the signal processing board 37, is disposed so as to face the rear surface of the display panel 10 and the backlight device 20. In this embodiment, the signal processing board 37 and the light receiving board 32 are disposed separately from each other. The signal processing board 37 and the light receiving board 32 are electrically connected.

The signal processing board 37 has a larger area than the light-receiving board 32 and is equipped with numerous circuit components such as integrated circuits and wiring. Therefore, if the backlight chassis 21 is made of a metal material, for example, contact between the backlight chassis 21 and the circuit components mounted on the signal processing board 37 may cause a short circuit. For this reason, it is preferable to position the signal processing board 37 relatively far away from the backlight chassis 21, which is also made of a metal material. On the other hand, the light-receiving board 32 has a smaller area and fewer circuit components mounted on it than the signal processing board 37, so it can be positioned relatively closer to the backlight chassis 21 than the signal processing board 37. Therefore, the light-receiving board 32 can be positioned in a variety of ways depending on the position and shape of the signal processing board 37. For example, the light-receiving board 32 can be positioned between the signal processing board 37 and the backlight chassis 21 so that it overlaps with the signal processing board 37.

In this way, the signal processing board 37 and the light receiving board 32 are provided separately from each other, which broadens the range of options for the placement position of the light receiving board 32 and improves the design freedom of the display device 5.

The signal processing board 37 and the light receiving board 32 are each provided separately from the backlight chassis 21. They may be connected to the backlight chassis 21 or to the housing 60 via a connecting member. While Figure 2 shows an example in which the signal processing board 37 is provided on the surface of the housing 60 facing the backlight chassis 21, it may also be attached to the backlight chassis 21, as will be described later using Figure 6.

The insert member 40 is inserted into the opening 21h formed in the backlight chassis 21 and the opening 22h formed in the reflective sheet 22. The insert member 40 has a columnar portion 41 and a protrusion 42. The columnar portion 41 is fitted so as to penetrate the opening 21h formed in the backlight chassis 21 and the opening 22h formed in the reflective sheet 22. The protrusion 42 protrudes from the surface 21a of the backlight chassis 21 closest to the display panel 10 toward the display panel 10. The insert member 40 is made of a material that transmits the operation signal 3 from the remote controller 2. For example, the insert member 40 is made of a material that transmits infrared light. The insert member 40 can be made of a white or translucent white resin material, but is not limited to this. For example, the insert member 40 may be configured such that the columnar portion 41 and the protrusion 42 are integrally formed, or may be formed as separate components and then combined.

Next, the light receiving member 30 and the insert member 40 will be described in detail using Figures 2 and 3. Figure 3 is a plan view of the backlight device 20 according to the embodiment. Note that Figure 3 omits the illustration of the diffusion plate 25 of the backlight device 20.

As shown in Figures 2 and 3, an opening 21h is formed in the backlight chassis 21 and an opening 22h is formed in the reflective sheet 22 to allow the operation signal 3 from the remote controller 2 to pass through. For example, openings 21h and 22h are formed opposite each other to form a continuous through-hole. Openings 21h and 22h need only have an area large enough to allow the operation signal 3 to pass through, but as described below, it is preferable that they have an area large enough to fit an insertion member 40.

The light-receiving member 30 is positioned facing the rear surface 21b of the backlight chassis 21, with the light-receiving surface of the light-receiving unit 31 facing the openings 21h and 22h. The operation signal 3 from the remote controller 2 passes through the display panel 10 and the diffuser 25, and passes through the openings 21h and 22h before being received by the light-receiving unit 31.

As such, the light receiving unit 31 faces the opening 21h formed in the backlight chassis 21 and is disposed to face the back surface 10b, which is the main surface of the backlight chassis 21 farthest from the display panel 10. That is, the light receiving unit 31 faces the back surface 21b of the backlight chassis 21, rather than the front surface 21a on which the multiple light sources 23 are provided. Therefore, unlike display devices in which the light receiving unit is disposed on the front surface of a backlight chassis provided with multiple light sources, the display device 5 according to this embodiment has the light receiving unit 31 disposed on the back surface 21b of the backlight chassis 21, on which the multiple light sources 23 are not disposed, rather than on the front surface 21a of the backlight chassis 21 on which the multiple light sources 23 are disposed. This prevents the light from the multiple light sources 23 from being blocked by the light receiving unit 31. As a result, it is possible to prevent a portion of the display panel 10 from being darkened due to the light receiving unit 31.

In addition, in the display device 5 according to this embodiment, the light receiving unit 31 is located facing the rear surface 21b of the backlight chassis 21, rather than in the non-display area ND, which is the so-called frame area. This allows for a narrower frame compared to display devices in which the light receiving unit is located in the frame area.

In this embodiment, an example is shown in which one opening 21h is formed in the backlight chassis 21 and one opening 22h is formed in the reflective sheet 22, but this is not limited to this. Multiple openings 21h may be formed in the backlight chassis 21, and multiple openings 22h may be formed in the reflective sheet 22 (an example will be described later using Figure 7).

In addition, it is preferable that an insert member 40 that transmits the operation signal 3 be inserted into the opening 21h of the backlight chassis 21 and the opening 22h of the reflective sheet 22. In other words, it is preferable that the insert member 40 be provided so as to face the light receiving unit 31. As a result, when the operation signal 3 from the remote controller 2 passes through the display panel 10 and the diffuser plate 25 and enters the inside of the backlight device 20, it is guided by the insert member 40, passes through the inside of the insert member 40, and then enters the openings 21h and 22h, and is received by the light receiving unit 31. In this way, the insert member 40 functions as a guide member that guides the operation signal 3 that has entered the inside of the backlight device 20 to the openings 21h, 22h, and the light receiving unit 31. Therefore, the operation signal 3 can be received by the light receiving unit 31 more efficiently than if the insert member 40 were not provided. In other words, the sensitivity of the light receiving unit 31 to receive the operation signal 3 can be improved.

The columnar portion 41 of the insertion member 40 may be long enough to contact the light receiving unit 31 when inserted into the opening 21h of the backlight chassis 21 and the opening 22h of the reflective sheet 22. This can further improve the sensitivity of the light receiving unit 31 to receiving the operation signal 3. The display device 5 according to this embodiment is not limited to a configuration in which the columnar portion 41 and the light receiving unit 31 are in contact with each other, and the columnar portion 41 and the light receiving unit 31 may be spaced apart.

For example, in the insert member 40, if the width of the columnar portion 41 is width W1 and the width of the protrusion 42 is width W2, it is preferable that the width W2 of the protrusion 42 be wider than the width W1 of the columnar portion 41. In other words, it is preferable that the width W2 of the protrusion 42 be wider than the widths of the openings 21h and 22h. This allows the operation signal 3 that has entered the backlight device 20 to be guided within the protrusion 42 by the relatively wide width W2 of the protrusion 42, and efficiently guided to the columnar portion 41 with the relatively narrow width W1, i.e., to the openings 22h and 21h, where it can be received by the light receiving unit 31. In this way, the insert member 40 can improve the sensitivity of the light receiving unit 31 to receive the operation signal 3 compared to when the width of the protrusion is narrower than the width of the columnar portion.

For example, the protrusion 42 has a thin shape that allows it to be spaced far enough away from the diffuser plate 25 that it will not come into contact with the diffuser plate 25 even if the diffuser plate 25 is bent. The planar shape of the protrusion 42 can be, but is not limited to, a circular shape.

As shown in Figures 2 and 3, in this embodiment, the positions at which the insert member 40, openings 21h and 22h, and light receiving member 30 are provided are approximately at the center of the display area DA. However, depending on the design of the display device 5, such as the position of the signal processing member 35, they may be located elsewhere than approximately at the center of the display area DA (for example, at the edge of the display area DA).

Next, a modified example of the insert member will be described using Figure 4. The shape of the insert member 40 can be modified in various ways. Figure 4 is a schematic diagram of the display system 1 showing a cross section of the display device 5 according to the first modified example of the embodiment. The display device 5 according to the first modified example of the embodiment shown in Figure 4 has an insert member 40A instead of the insert member 40 described using Figures 2 and 3.

The insert member 40A has a columnar portion 41A inserted into the openings 21h and 22h, and a protrusion 42A protruding from the surface 21a of the backlight chassis 21. The columnar portion 41A has the same configuration as the columnar portion 41 of the insert member 40 described with reference to Figures 2 and 3. The protrusion 42A is similar to the protrusion 42 of the insert member 40 described with reference to Figures 2 and 3, except that it has a different shape.

The length H42 is the length of the protrusion 42A from the contact point with the columnar portion 41A to the top of the head. The protrusion 42A has a length H42 that allows the top of the head to support the diffuser plate 25. The length H42 of the protrusion 42A that allows the top of the head to support the diffuser plate 25 can be, for example, the length at which the top of the head comes into contact with the diffuser plate 25. Furthermore, the length H42 of the protrusion 42A that allows the top of the head to support the diffuser plate 25 can be the length at which the top of the head comes into contact with the diffuser plate 25 when the diffuser plate 25 is not deflected, or the length at which the top of the head comes into contact with the diffuser plate 25 when the diffuser plate 25 is deflected. In other words, the length H42 of the protrusion 42A may be such that the top of the head comes into contact with the diffuser plate 25 when the deflection of the diffuser plate 25 is large and the diffuser plate 25 is laid horizontally (as shown in Figure 4), but the top of the head does not come into contact with the protrusion 42A when the deflection of the diffuser plate 25 is small and the diffuser plate 25 is in a more upright position than horizontal.

In this way, the protrusions 42A of the insert member 40A have a length H42 that allows the top of the protrusions to support the diffuser plate 25, allowing them to function as support pins 24. This allows the protrusions 42A of the insert member 40A to more stably support the diffuser plate 25. Additionally, compared to protrusions that are short enough not to come into contact with the diffuser plate 25, the protrusions 42A can guide the operation signal 3 that has penetrated the display panel 10 and the diffuser plate 25 and entered the backlight device 20 through a wider area within the protrusions 42A in the thickness direction of the backlight device 20 (from the openings 21h and 22h toward the diffuser plate 25) and to the columnar portions 41A inserted into the openings 21h and 22h. As a result, the insert member 40A can improve the sensitivity of the light receiving unit 31 to receive the operation signal 3 compared to when the protrusions are thinner.

It is also preferable that the widest width of the protrusion 42A is wider than the width of the columnar portion 41A. This allows the operation signal 3 that enters the backlight device 20 to be efficiently guided by the relatively wide protrusion 42A to the relatively narrow columnar portion 41A, i.e., to the openings 22h and 21h, where it can be received by the light receiving unit 31. As a result, the sensitivity of the light receiving unit 31 to receive the operation signal 3 can be further improved.

In addition, since the protrusion 42A supports the diffuser plate 25 at its tip, the top, it is preferable that the top be rounded rather than pointed. Furthermore, it is preferable that the protrusion 42A be made of a material, shape, or color that transmits infrared light and that easily reflects the light emitted by the multiple light sources 23 toward the diffuser plate 25. For example, the protrusion 42A can be shaped so that its width gradually narrows from the base (the contact point with the columnar portion 41A) to the top. This allows the light emitted by the multiple light sources 23 to be efficiently reflected toward the diffuser plate 25. It should be noted that the shape of the columnar portion 41A is not limited to the one described above.

Next, modified examples of the light receiving member and signal processing member will be described using Figure 5. The shapes of the light receiving member 30A and the signal processing member 35A can be modified in various ways. Figure 5 is a schematic diagram of the display system 1 showing a cross section of the display device 5 according to Modification 2 of the embodiment. The display device 5 according to Modification 2 of the embodiment shown in Figure 5 has a light receiving member 30A and a signal processing member 35A instead of the light receiving member 30 and the signal processing member 35 described using Figures 2 and 3.

The light-receiving member 30A has a light-receiving section 31 and a light-receiving substrate 32A. The signal processing member 35A has a signal processing circuit 36 and a signal processing substrate 37A. The light-receiving substrate 32A and the signal processing substrate 37A differ from the light-receiving substrate 32 and the signal processing substrate 37 in that they are integrally constructed, but are otherwise similar to the light-receiving substrate 32 and the signal processing substrate 37.

For example, the light-receiving board 32A and the signal processing board 37A may be integrally configured by configuring the substrate on which the light-receiving unit 31 and the signal processing circuit 36 are mounted as a single, continuous substrate, or by connecting two substrates on which the light-receiving unit 31 and the signal processing circuit 36 are mounted using a connecting member. The integrally configured light-receiving board 32A and signal processing board 37A may simply be referred to as the main board 38. In other words, the light-receiving board 32A is the portion of the main board 38 on which the light-receiving unit 31 is mounted, and the signal processing board 37A is the area of the main board 38 other than the portion on which the light-receiving unit 31 is mounted.

In this way, the signal processing board 37A and the light receiving board 32A are configured as an integrated unit, which makes it easier to assemble the display device 5 compared to when the signal processing board and the light receiving board are separate components.

In the example shown in FIG. 5, the main board 38 is provided on the surface of the housing 60 facing the backlight chassis 21. The columnar portion 41 may be long enough to protrude from the rear surface 21b of the backlight chassis 21 and make contact with the light receiving portion 31. This improves the sensitivity of the light receiving portion 31 to receiving the operation signal 3. The columnar portion 41 and the light receiving portion 31 may also be configured to be separated from each other.

Next, a modified example of the mounting position of the signal processing board will be described using Figure 6. The mounting position of the signal processing board 37A can be changed in various ways. Figure 6 is a schematic diagram of a display system 1 showing a cross section of a display device 5 according to a third modified example of the embodiment. As shown in Figure 6, the backlight chassis 21 may have a backlight chassis main body 21c and multiple connection portions 21d protruding from the backlight chassis main body 21c. The backlight chassis main body 21c houses and protects a reflective sheet 22, multiple light sources 23, and multiple support pins 24.

The multiple connection portions 21d protrude from the rear surface of the backlight chassis main body 21c and are connecting members to which the main board 38 is connected. For example, the main board 38 is fixed to the multiple connection portions 21d by screws or the like. In this way, the main board 38 is connected to the multiple connection portions 21d protruding from the rear surface of the backlight chassis main body 21c, thereby maintaining the necessary distance from the rear surface of the backlight chassis main body 21c and preventing contact with the backlight chassis main body 21c. For example, the multiple connection portions 21d can be formed by embossing, but the method of forming the multiple connection portions 21d is not limited to this and other forming methods may also be used. Furthermore, the multiple connection portions 21d may be integrally formed using the same material as the backlight chassis main body 21c, or they may be formed from a different material and attached to the backlight chassis main body 21c.

For example, the light receiving unit 31 is mounted on the surface 38a of the main board 38 that faces the backlight chassis 21. Furthermore, for example, the signal processing circuit 36 is mounted on the back surface 38b of the main board 38, opposite the surface 38a that faces the backlight chassis 21. Thus, in the example shown in FIG. 6, the signal processing circuit 36 is mounted on the back surface 38b of the main board 38, opposite the surface 38a on which the light receiving unit 31 is mounted. In other words, the light receiving unit 31 is mounted on the surface 38a of the light receiving board 32A that faces the backlight chassis 21, while the signal processing circuit 36 is mounted on the back surface 38b of the signal processing board 37A that is opposite the surface 38a that faces the backlight chassis 21. This more reliably prevents the signal processing circuit 36 from coming into contact with the backlight chassis 21.

Next, using Figure 7, we will explain modified examples of the openings formed in the backlight chassis 21 and the reflective sheet 22. The backlight chassis 21 and the reflective sheet 22 may each have multiple openings for passing the operation signal 3. Figure 7 is a plan view of a backlight device 20 according to Modification 4 of the embodiment. Note that Figure 7 does not illustrate the diffusion plate 25 of the backlight device 20. The display device 5 may have the backlight device 20 shown in Figure 7 instead of the backlight device 20 shown in Figure 3.

In the backlight device 20 shown in FIG. 7, the backlight chassis 21 is formed with, for example, openings 21h1, 21h2, 21h3, 21h4, and 21h5 instead of opening 21h. Also, in the backlight device 20 shown in FIG. 7, the reflective sheet 22 is formed with, for example, openings 22h1, 22h2, 22h3, 22h4, and 22h5 instead of opening 22h.

For example, openings 21h1 and 22h1 are formed opposite each other to form a continuous through-hole, openings 21h2 and 22h2 are formed opposite each other to form a continuous through-hole, openings 21h3 and 22h3 are formed opposite each other to form a continuous through-hole, openings 21h4 and 22h4 are formed opposite each other to form a continuous through-hole, and openings 21h5 and 22h5 are formed opposite each other to form a continuous through-hole.

For example, within the display area DA, openings 21h1 and 22h1, openings 21h2 and 22h2, openings 21h4 and 22h4, and openings 21h5 and 22h5 are formed near the four corners of the display area DA. Openings 21h3 and 22h3 are formed approximately in the center of the display area DA.

Each of openings 21h1 and 22h1, openings 21h2 and 22h2, openings 21h3 and 22h3, openings 21h4 and 22h4, and openings 21h5 and 22h5 may have an area large enough to allow operation signal 3 to pass through, but it is preferable that the area be large enough to fit the columnar portion 41 of the insertion member 40.

In the example shown in Figure 7, the insertion member 40 is inserted into the openings 21h2 and 22h2. The light receiving unit 31 faces the openings 21h2 and 22h2 and is disposed facing the back surface 10b (see Figure 2, etc.), which is the main surface of the backlight chassis 21 that is farther from the display panel 10.

In this way, multiple openings 21h1 to 21h5 are formed in the backlight chassis 21, and any one of the multiple openings 21h1 to 21h5 may be an opening into which the insert member 40 is inserted (opening 21h2 in the example shown in FIG. 7). Furthermore, multiple openings 22h1 to 22h5 are formed in the reflective sheet 22, and any one of the multiple openings 22h1 to 22h5 may be an opening into which the insert member 40 is inserted (opening 22h2 in the example shown in FIG. 7).

In this way, by forming multiple openings 21h1-21h5 in the backlight chassis 21, into which the insert member 40 can be inserted, and multiple openings 22h1-22h5 in the reflective sheet 22, into which the insert member 40 can be inserted, the range of positions from which the insert member 40 and the light receiving unit 31 can be positioned can be expanded. This improves the degree of freedom in designing the display device 5.

1: Display system, 2: Remote controller, 3: Operation signal, 5: Display device, 10: Display panel, 20: Backlight device, 21: Backlight chassis, 21h, 21h1-21h5: Opening, 22: Reflective sheet, 22h, 22h1-22h5: Opening, 23: Light source, 24: Support pin, 25: Diffuser, 30, 30A: Light receiving member, 31: Light receiving unit, 32, 32A: Light receiving board, 35, 35A: Signal processing member, 36: Signal processing circuit, 37, 37A: Signal processing board, 40, 40A: Insert, 41, 41A: Column, 42, 42A: Protrusion, 60: Housing, DA: Display area, ND: Non-display area

Claims (9)

a display panel, a light receiving section that receives an operation signal from a remote controller, and a backlight device that is provided on the back surface of the display panel so as to face the display panel;
the backlight device has a backlight chassis;
the light receiving unit is provided to face an opening formed in the backlight chassis and to face a rear surface, which is one of both main surfaces of the backlight chassis and is a main surface farther from the display panel;
an insertion member that transmits the operation signal is inserted into the opening of the backlight chassis;
the insertion member includes a columnar portion inserted into the opening of the backlight chassis and a protrusion protruding from one of the two main surfaces of the backlight chassis that is closer to the display panel;
The display device , wherein the protrusion extends in a direction parallel to the display panel, and a space above the protrusion is open. The display device described in claim 1, wherein the columnar portion has a length that allows it to contact the light receiving portion when the insertion member is inserted into the opening. The display device described in claim 2, wherein the protrusion is wider than the columnar portion. The display device described in claim 3, wherein the backlight device has a diffusion plate arranged to face the backlight chassis, and the protrusion has a length that allows the top of the protrusion to support the diffusion plate. The display device further includes a signal processing board on which a signal processing circuit for controlling the driving of the display panel and the backlight device is mounted, and a light receiving board on which the light receiving unit is mounted,
The display device according to claim 1 , wherein the signal processing board and the light receiving board are disposed opposite the rear surface of the backlight chassis and are separated from each other. The display device further includes a signal processing board on which a signal processing circuit for controlling the driving of the display panel and the backlight device is mounted, and a light receiving board on which the light receiving unit is mounted,
The display device according to claim 1 , wherein the signal processing board and the light receiving board face the back surface of the backlight chassis and are integrally formed. the light receiving unit is mounted on a surface of the light receiving substrate that faces the backlight chassis,
7. The display device according to claim 5, wherein the signal processing circuit is mounted on a rear surface of the signal processing board opposite to a surface facing the backlight chassis. A plurality of openings are formed in the backlight chassis,
The display device according to claim 2 , wherein one of the plurality of openings is the opening into which the insertion member is inserted. A display device according to any one of claims 1 to 8;
and the remote controller.