JP2022049973A - Video display unit - Google Patents

Abstract

To obtain sufficient heat dissipation effect while relaxing restrictions on arrangement of a heat dissipation component with simple constitution.SOLUTION: A video display unit 1 comprises: a power supply substrate 60 arranged on one end side on the back side of a base body 20 covering the back of a display part; a control substrate 62 arranged on the other end side; a light source control substrate 66 and a double-speed substrate 64 arranged between the control substrate 62 and power supply substrate 60; and a back cover housing the respective substrates with the base body 20, wherein the space between the base body 20 and back cover is divided into a plurality of independent housing spaces 70, the control substrate 62, power supply substrate 60, double-speed substrate 64, and light source control substrate 66 are housed in the mutually different housing spaces 70, and the back cover is provided with air intake outlets communicating with the outside of the back cover from the housing space 70 corresponding to the respective housing spaces 70.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a video display device.

In recent years, LSIs (Large-scale integration) capable of displaying and recording high-resolution images called 4K or 8K, and video display devices such as televisions equipped with the LSIs have been developed. Since the 4K TV or the 8K TV has a large number of pixels, the amount of information controlled by the mounted LSI is large, and the amount of heat generated by the LSI also increases. Further, if a double speed function for smoothly displaying a violent movement is added to a video display device such as a television, the amount of heat generated in the LSI is further increased. In order to operate such a circuit component such as an LSI normally without causing thermal runaway, it is necessary to appropriately dissipate heat from the circuit component.

As a technique for dissipating heat from a circuit component such as an LSI, for example, in Patent Document 1, a heat sink is brought into close contact with a heat conductive sheet having flexibility on the surface of the LSI opposite to the surface facing the circuit board. The structure is described.

Japanese Patent No. 4498163 (paragraph 0018-0019, FIG. 2)

In the technique described in Patent Document 1, it is necessary to increase the envelope volume of the heat sink in order to secure the heat dissipation area required for heat dissipation of the LSI. In order to increase the envelope volume, it is necessary to increase the area of the heat sink in the direction parallel to the circuit board or to increase the fins of the heat sink. However, the amount of heat generated is large, such as an IC (Integrated Circuit) that displays and records 4K or 8K video on a circuit board, an IC for displaying at double speed, and a transistor that drives an LED (Light-emitting diode) that is a light source. Moreover, if a plurality of heat-generating components having a low upper limit of the allowable temperature are mounted in close proximity to each other, the area in which the heat sink for each heat-generating component can be arranged is limited, and there is a problem that the area of the heat sink cannot be increased so much. Further, if the fins of the heat sink are raised, there is a problem that the thickness of the image display device itself such as the circuit board and the television on which the heat sink is mounted becomes large.

This disclosure is made in order to solve the above-mentioned problems, and obtains a video display device capable of obtaining a sufficient heat dissipation effect while relaxing restrictions on the arrangement of heat dissipation parts with a simple configuration. be.

The image display device according to the present disclosure has a light source, a display unit that displays an image, and a metal substrate that covers the back surface of the display unit and extends in the horizontal direction orthogonal to the vertical direction and the vertical direction. A control unit that processes the video input signal and outputs the processed video data, and a double speed unit that processes the video data output from the control unit so that it can be displayed smoothly and outputs it as a video output signal. The light source control unit that drives the light source based on the video output signal output from the double speed unit, the power supply unit that converts the power supplied from the external power supply and supplies the converted power to the control unit, and the power supply unit. Is arranged, a power supply board arranged on one end side in the left-right direction on the back side of the substrate, a control board arranged on the other end side in the left-right direction on the back side of the substrate, and a light source control unit. Is arranged, a light source control board arranged between the control board and the power supply board in the left-right direction on the back side of the substrate, and a control board on the back side of the base in the left-right direction. The substrate and the back cover are provided with a double-speed substrate arranged between the power supply substrate and a back cover that covers the back surface of the substrate and accommodates the control substrate, the power supply substrate, the double-speed substrate, and the light source control substrate between the substrate and the substrate. The space between and is divided into a plurality of independent accommodation spaces, and the control board, the power supply board, the double speed board, and the light source control board are housed in different accommodation spaces, and the back cover is provided in each of the accommodation spaces. Correspondingly, an intake / exhaust port that communicates from the accommodation space to the outside of the back cover is provided.

According to the present disclosure, it is possible to obtain a sufficient heat dissipation effect while relaxing the restrictions on the arrangement of heat dissipation parts with a simple configuration.

It is a perspective view of the image display device which shows Embodiment 1. FIG. It is a rear perspective view of the image display device which shows Embodiment 1. FIG. It is an exploded perspective view of the image display device which shows Embodiment 1. FIG. It is a functional block diagram of the image display device which shows Embodiment 1. FIG. It is a back view schematically showing the structure on the back side of the lower part of the substrate of the image display device which shows Embodiment 1. FIG. It is a schematic diagram of the cross section along the VI-VI line of FIG. It is a schematic diagram of the cross section along the line VII-VII of FIG. It is a schematic diagram of the cross section along the line VIII-VIII of FIG. It is a back view schematically showing the structure on the back side of the lower part of the substrate of the image display device which shows Embodiment 2. FIG. It is a schematic diagram of the cross section along the X-ray line of FIG.

Hereinafter, embodiments will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are designated by the same reference numerals.

Embodiment 1.
FIG. 1 is a perspective view of the image display device 1 according to the first embodiment. FIG. 2 is a rear perspective view of the image display device 1. FIG. 3 is an exploded perspective view of the image display device 1. As shown in FIGS. 1 to 3, the image display device 1 includes a display unit 10, a substrate 20, a back cover 30, and an electrical unit 40.

The display unit 10 displays an image. In the present embodiment, the display unit 10 is formed in a rectangular shape composed of a side extending in the vertical direction Y1 and a side extending in the horizontal direction Y2. Here, the vertical direction Y1 and the horizontal direction Y2 are orthogonal to each other. A bezel 12 is attached to the peripheral edge of the display unit 10. The bezel 12 is formed in a rectangular frame shape and holds the display unit 10.

The substrate 20 covers the back surface of the display unit 10 and is a metal member extending in the vertical direction Y1 and the horizontal direction Y2. Here, the back surface is a surface on the opposite side of the front-rear direction Y3 orthogonal to the vertical direction Y1 and the horizontal direction Y2 in FIGS. 1 and 2. In the present embodiment, the substrate 20 is formed by sheet metal processing.

The back cover 30 covers the back surface of the substrate 20 and accommodates the electric unit 40 between the back cover 30 and the substrate 20. In this embodiment, the back cover 30 is provided at the lower part of the substrate 20. Further, the back cover 30 is made of resin. A stand 32 is attached to the lower end of the back cover 30, that is, the end on the opposite side of the vertical direction Y1. The stand 32 supports the image display device 1.

The electric unit 40 is an electric circuit for controlling the image display device 1. The electric unit 40 is arranged between the substrate 20 and the back cover 30.

FIG. 4 is a functional block diagram of the video display device 1. As shown in FIG. 4, the display unit 10 includes a light source 14 and a panel 16. The light source 14 emits light. The light source 14 is composed of, for example, an LED. The panel 16 controls the light emitted from the light source 14 to display an image. Further, the electric unit 40 includes a power supply unit 42, a control unit 44, a double speed unit 46, a light source control unit 48, and a panel control unit 50.

The power supply unit 42 converts the electric power supplied from the external power source, and supplies the converted electric power to the control unit 44. In the present embodiment, the power supply unit 42 has a DC-DC converter element or the like that converts a voltage. Therefore, the amount of heat generated in the power supply unit 42 becomes large.

The control unit 44 controls the main operation of the video display device 1. The control unit 44 performs video processing on the video input signal input via the video input unit (not shown), and outputs the video data to which the video processing has been performed to the double speed unit 46. In the present embodiment, the control unit 44 has an LSI for displaying 4K broadcast or 8K broadcast video and an LSI for recording 4K broadcast or 8K broadcast video. These LSIs have a large amount of heat generation and a low upper limit of the allowable temperature. Therefore, there is a high need for heat dissipation from the control unit 44.

Further, a storage unit 52 is connected to the control unit 44. The storage unit 52 stores video data processed by the control unit 44 and data such as a program for operating the control unit 44. The storage unit 52 is, for example, a hard disk drive.

The double speed unit 46 processes the moving image, which is the video data output from the control unit 44, so that it can be smoothly displayed, and outputs the video as a video output signal. For example, in a general television, the refresh rate indicating the frequency of updating the screen is 60 Hz, but in the video display device 1, the refresh rate is set to 120 Hz by the double speed unit 46. As described above, since the refresh rate is doubled from 60 Hz to 120 Hz, even moving images such as sports with intense movement can be displayed more smoothly as compared with a general television. Further, the double speed unit 46 has a large calorific value like the control unit 44.

The light source control unit 48 drives the light source 14 of the display unit 10 based on the video output signal output from the double speed unit 46. In the present embodiment, the light source control unit 48 has a large number of transistors that amplify and switch signals in order to drive the light source 14. Therefore, the light source control unit 48 generates a large amount of heat.

The panel control unit 50 controls the panel 16 of the display unit 10 based on the video output signal output from the double speed unit 46.

Next, the arrangement of each part constituting the electric part 40 will be described with reference to FIGS. 5 to 8. FIG. 5 is a rear view schematically showing the structure on the back surface side of the lower portion of the substrate 20 of the image display device 1. In FIG. 5, the display unit 10 and the back cover 30 are omitted. FIG. 6 is a schematic cross-sectional view taken along the VI-VI line of FIG. FIG. 7 is a schematic cross-sectional view taken along the line VII-VII of FIG. FIG. 8 is a schematic cross-sectional view taken along the line VIII-VIII of FIG.

As shown in FIG. 5, the power supply unit 42 is arranged on the power supply board 60. The control unit 44 is arranged on the control board 62. The double speed unit 46 is arranged on the double speed substrate 64. The light source control unit 48 is arranged on the light source control board 66. The panel control unit 50 is arranged on the panel control board 68. The power supply board 60, the control board 62, the double speed board 64, the light source control board 66, and the panel control board 68 are independent boards.

The power supply substrate 60 is arranged on one end side in the left-right direction Y2 on the back surface side of the substrate 20. In the present embodiment, the power supply substrate 60 is arranged in the portion of the substrate 20 on the forward side in the left-right direction Y2. Further, the control substrate 62 is arranged on the other end side of the left-right direction Y2 on the back surface side of the substrate 20. In the present embodiment, the control substrate 62 is arranged in the portion of the substrate 20 on the opposite side of the left-right direction Y2. The double speed substrate 64, the light source control substrate 66, and the panel control substrate 68 are arranged between the power supply substrate 60 and the control substrate 62 on the back side of the substrate 20 in the left-right direction Y2. That is, the double speed substrate 64, the light source control substrate 66, and the panel control substrate 68 are arranged at the center of the substrate 20 in the left-right direction Y2.

In the present embodiment, the double speed substrate 64 and the light source control substrate 66 are arranged side by side in the vertical direction Y1. In the example shown in FIG. 5, the double speed substrate 64 is arranged below the light source control substrate 66. Further, the panel control board 68 is arranged below the double speed board 64. In this way, the power supply board 60, the control board 62, the double speed board 64, the light source control board 66, and the panel control board 68 are arranged on substantially the same plane on the back surface side of the base 20. Further, the storage unit 52 is arranged below the panel control board 68.

The space between the substrate 20 and the back cover 30 is divided into a plurality of independent accommodation spaces 70. In the present embodiment, the space between the substrate 20 and the back cover 30 is divided into a first accommodation space 71, a second accommodation space 72, a third accommodation space 73, a fourth accommodation space 74, and a fifth accommodation space 75. Has been done. Further, each substrate is accommodated in different accommodation spaces 70, that is, the first accommodation space 71, the second accommodation space 72, the third accommodation space 73, the fourth accommodation space 74, and the fifth accommodation space 75. Specifically, the power supply board 60 is housed in the first storage space 71. The control board 62 is housed in the second storage space 72. The light source control board 66 is housed in the third storage space 73. The double speed substrate 64 is housed in the fourth storage space 74. The panel control board 68 is housed in the fifth storage space 75.

The accommodation space 70 is formed by partitioning the space formed between the substrate 20 and the back cover 30 by a partition portion. In the present embodiment, as shown in FIG. 5, the video display device 1 further includes a first partition portion 81, a second partition portion 82, a third partition portion 83, and a fourth partition portion 84. ing. The first partition portion 81 and the second partition portion 82 are formed in a plate shape extending in the vertical direction Y1 and the front-rear direction Y3. The third partition portion 83 and the fourth partition portion 84 are formed in a plate shape extending in the left-right direction Y2 and the front-rear direction Y3. Further, the first partition portion 81, the second partition portion 82, the third partition portion 83, and the fourth partition portion 84 are molded of resin.

Further, the back cover 30 is provided with an intake / exhaust port 90 that communicates from the accommodation space 70 to the outside of the back cover 30 corresponding to each of the accommodation spaces 70.

As a specific configuration of the accommodation space 70, as shown in FIGS. 5 and 6, the first accommodation space 71 is formed by the substrate 20, the back cover 30, and the first partition portion 81. The first partition portion 81 partitions the first accommodation space 71 from the third accommodation space 73, the fourth accommodation space 74, and the fifth accommodation space 75. In the first accommodation space 71, the power supply board 60 is attached to the base 20 while being insulated from the base 20 by a mounting member (not shown). Further, as the intake / exhaust port 90, the back cover 30 is provided with a first intake / exhaust port 91 that communicates with the outside from the first accommodation space 71. The first intake / exhaust port 91 is, for example, a hole that penetrates the back cover 30. In the example shown in FIG. 6, the back cover 30 is provided with three first intake / exhaust ports 91, one is provided at a position above the power supply board 60, and the other one is the back surface of the power supply board 60. It is provided at a position facing the power supply board 60 on the side, and the other one is provided at a position below the power supply board 60.

Further, as shown in FIGS. 5 and 7, the second accommodating space 72 is formed by the substrate 20, the back cover 30, and the second partition portion 82. The second partition portion 82 partitions the second accommodation space 72 from the third accommodation space 73, the fourth accommodation space 74, and the fifth accommodation space 75. In the second accommodation space 72, the control board 62 is attached to the base 20 while being insulated from the base 20 by a mounting member (not shown). Further, as the intake / exhaust port 90, the back cover 30 is provided with a second intake / exhaust port 92 that communicates with the outside from the second accommodation space 72. The second intake / exhaust port 92 is, for example, a hole that penetrates the back cover 30. In the example shown in FIG. 7, the back cover 30 is provided with three second intake / exhaust ports 92, one is provided at a position above the control board 62, and the other is the back surface of the control board 62. It is provided at a position facing the control board 62 on the side, and the other one is provided at a position below the control board 62.

As shown in FIGS. 5 and 8, the third accommodation space 73, the fourth accommodation space 74, and the fifth accommodation space 75 are surrounded by the substrate 20, the back cover 30, the first partition 81, and the second partition 82. It is installed in the space. The third partition portion 83 divides this space into a third accommodation space 73 and a fourth accommodation space 74. The fourth partition portion 84 divides this space into a fourth accommodation space 74 and a fifth accommodation space 75. That is, in the present embodiment, the third accommodation space 73 is formed by the substrate 20, the back cover 30, the first partition portion 81, the second partition portion 82, and the third partition portion 83. The fourth accommodation space 74 is formed by a substrate 20, a back cover 30, a first partition 81, a second partition 82, a third partition 83, and a fourth partition 84. The fifth storage space 75 is formed by a substrate 20, a back cover 30, a first partition 81, a second partition 82, and a fourth partition 84.

In the third accommodation space 73, the light source control substrate 66 is attached to the substrate 20 while being insulated from the substrate 20 by an attachment member (not shown). Further, as the intake / exhaust port 90, the back cover 30 is provided with a third intake / exhaust port 93 that communicates with the outside from the third accommodation space 73. The third intake / exhaust port 93 is, for example, a hole that penetrates the back cover 30. In the example shown in FIG. 8, the back cover 30 is provided with two third intake / exhaust ports 93, one is provided at a position above the light source control board 66, and the other one is a light source control board 66. It is provided at a position facing the light source control board 66 on the back side of the above.

In the fourth accommodation space 74, the double speed substrate 64 is attached to the substrate 20 while being insulated from the substrate 20 by a mounting member (not shown). Further, as the intake / exhaust port 90, the back cover 30 is provided with a fourth intake / exhaust port 94 that communicates with the outside from the fourth accommodation space 74. The fourth intake / exhaust port 94 is, for example, a hole that penetrates the back cover 30. In the example shown in FIG. 8, in the back cover 30, the fourth intake / exhaust port 94 is provided at a position facing the double speed board 64 on the back side of the double speed board 64.

Further, in the present embodiment, the image display device 1 further includes a sheet-shaped first heat radiating member 101 and a second heat radiating member 102 having thermal conductivity. The first heat radiating member 101 and the second heat radiating member 102 are heat radiating sheets made of, for example, silicone or the like. The first heat radiation member 101 is arranged between the substrate 20 and the light source control substrate 66, and is in contact with each of the substrate 20 and the light source control substrate 66. The second heat radiating member 102 is arranged between the substrate 20 and the double speed substrate 64, and is in contact with each of the substrate 20 and the double speed substrate 64.

In the fifth accommodation space 75, the panel control substrate 68 is attached to the substrate 20 while being insulated from the substrate 20 by an attachment member (not shown). Further, as the intake / exhaust port 90, the back cover 30 is provided with a fifth intake / exhaust port 95 that communicates with the outside from the fifth accommodation space 75. The fifth intake / exhaust port 95 is, for example, a hole that penetrates the back cover 30. In the example shown in FIG. 8, the back cover 30 is provided with two fifth intake / exhaust ports 95, one of which is provided on the back side of the panel control board 68 at a position facing the panel control board 68, and the other. One of them is provided at a position corresponding to the lower part of the panel control board 68.

The storage unit 52 is arranged in a space formed by the substrate 20 and the back cover 30 and independent of the other storage space 70.

As described above, the image display device 1 according to the present embodiment has a light source 14, covers the display unit 10 for displaying images and the back surface of the display unit 10, and is in the vertical direction Y1 and the vertical direction Y1. A metal substrate 20 extending in the orthogonal left-right direction Y2, a control unit 44 that performs image processing on the input video input signal and outputs the processed image data, and an image output from the control unit 44. From the double speed unit 46 that processes the data so that it can be displayed smoothly and outputs it as a video output signal, the light source control unit 48 that drives the light source 14 based on the video output signal output from the double speed unit 46, and the external power supply. A power supply unit 42 that converts the supplied power and supplies the converted power to the control unit 44, and a power supply board 60 that has the power supply unit 42 arranged and arranged on one end side in the left-right direction Y2 on the back surface side of the substrate 20. , A control board 62 arranged on the other end side of the left-right direction Y2 on the back side of the base 20 and a light source control unit 48 arranged on the back side of the base 20 in the left-right direction Y2. A light source control board 66 arranged between the control board 62 and the power supply board 60 and a double speed unit 46 are arranged between the control board 62 and the power supply board 60 on the back side of the base 20 in the left-right direction Y2. The substrate 20 is provided with an arranged double-speed substrate 64 and a back cover 30 that covers the back surface of the substrate 20 and accommodates a control substrate 62, a power supply substrate 60, a double-speed substrate 64, and a light source control substrate 66 between the substrate 20. The space between the back cover 30 and the back cover 30 is divided into a plurality of independent accommodation spaces 70, and the control board 62, the power supply board 60, the double speed board 64, and the light source control board 66 are housed in different accommodation spaces 70, respectively. The back cover 30 is provided with an intake / exhaust port 90 that communicates from the accommodation space 70 to the outside of the back cover 30 corresponding to each of the accommodation spaces 70.

As described above, the power supply unit 42, the control unit 44, the light source control unit 48, and the double speed unit 46, which generate a large amount of heat, are arranged on the independent power supply board 60, control board 62, light source control board 66, and double speed board 64, respectively. Conventionally, when the power supply unit, the control unit, the light source control unit, and the double speed unit are arranged on the same substrate, the heat generated from the components included in each unit conducts the substrate and raises the temperature of the other components. On the other hand, by arranging each part on an independent substrate as described above, the heat generating component contained in each substrate is thermally separated from the other substrate, and the temperature of the component contained in the other substrate is increased. The rise can be suppressed. In addition, since each substrate is housed in different accommodation spaces 70 independent of each other, it is more reliable to suppress the temperature rise of the parts contained in the other boards due to the heat generation of the heat generating parts contained in each board. can. Since the intake / exhaust ports 90 are provided corresponding to each of the accommodation spaces 70, external air is taken in from the intake / exhaust ports 90, and the taken-in air is taken in together with the heat released from each substrate. It can be discharged from 90. As a result, the heat generated from each substrate can be appropriately dissipated to the outside. Further, since each board is arranged separately as described above, the space for arranging heat sinks and other heat-dissipating components on each board is wider than when each part such as a power supply part is arranged on the same board. It can be taken, and restrictions on the arrangement of heat-dissipating parts can be relaxed. Further, the power supply board 60 and the control board 62 are arranged on one end side and the other end side of Y2 in the left-right direction on the back surface side of the base 20, respectively. Since the power supply board 60 and the control board 62 generate a particularly large amount of heat, large heat dissipation components are often arranged, and the scale of the circuit is also large, so that a large area is required. Therefore, by arranging the power supply board 60 and the control board 62 on both ends of the base 20 in the left-right direction Y2, which can easily secure a relatively large area, the area required for the placement can be secured and the heat radiating parts are arranged. Restrictions can be relaxed. On the other hand, the light source control board 66 and the double speed board 64 are arranged between the power supply board 60 and the control board 62 because the circuit scale is smaller than that of the power supply board 60 and the control board 62 and a large board area is not required. As a result, the area required for placement can be secured. As described above, according to the image display device 1 according to the present embodiment, it is possible to obtain a sufficient heat dissipation effect while relaxing the restrictions on the arrangement of the heat dissipation parts with the simple configuration as described above.

Further, the image display device 1 further includes a sheet-shaped first heat radiating member 101 and a second heat radiating member 102 having thermal conductivity, and the light source control board 66 and the double speed board 64 are arranged side by side in the vertical direction Y1. The first heat radiating member 101 is arranged between the substrate 20 and the light source control substrate 66 and is in contact with each of the substrate 20 and the light source control substrate 66, and the second heat radiating member 102 is the substrate 20 and the double speed substrate. It is arranged between 64 and is in contact with each of the substrate 20 and the double speed substrate 64.

With such a configuration, the heat generated by the light source control substrate 66 is dissipated to the substrate 20 via the first heat radiating member 101, and the heat generated by the double speed substrate 64 is dissipated to the substrate 20 via the second heat radiating member 102. .. As a result, it is possible to more reliably suppress the temperature rise of the component on the light source control board 66 and the component on the double speed board 64. Further, since the light source control board 66 and the double speed board 64 are arranged side by side in the vertical direction Y1, the power supply board 60, the control board 62, the light source control board 66, and the double speed board 64 can be arranged on substantially the same plane. It will be possible. As a result, the distance in the front-rear direction Y3 between the substrate 20 on which each substrate is arranged and the back cover 30 can be shortened, and the dimension, that is, the thickness of the image display device 1 in the front-rear direction Y3 can be made thinner. Can be done.

Between the substrate 20 and the back cover 30, as the accommodation space 70, a first accommodation space 71 accommodating the power supply substrate 60, a second accommodating space 72 accommodating the control substrate 62, and a second accommodating the light source control substrate 66 are accommodated. A third accommodation space 73 and a fourth accommodation space 74 for accommodating the double-speed substrate 64 are provided, and the image display device 1 forms the first accommodation space 71 together with the substrate 20 and the back cover 30, and the third accommodation space 71 is provided. A second accommodation space 72 is formed together with the first partition portion 81 that partitions the first accommodation space 71 from the space 73 and the fourth accommodation space 74, and the substrate 20 and the back cover 30, and the third accommodation space 73 and the fourth accommodation space are formed. The space surrounded by the second partition portion 82 that partitions the second storage space 72 from 74 and the base 20, the back cover 30, the first partition portion 81, and the second partition portion 82 is the third storage space 73 and the fourth storage. A third partition 83 that partitions the space 74 is further provided, and the first partition 81, the second partition 82, and the third partition 83 are formed of resin.

In this way, the first accommodation space 71, the second accommodation space 72, the third accommodation space 73, and the fourth accommodation space 74 are partitioned by the first partition portion 81, the second partition portion 82, and the third partition portion 83. Therefore, it is possible to suppress the flow of heat due to heat transfer or heat radiation from the substrate accommodated in one accommodation space 70 to the substrate accommodated in the adjacent accommodation space 70 by the partition portion, and each of the accommodation spaces 70 is independent of each other. Can be made to. Further, since the resin can have a lower thermal conductivity than the metal, it is possible to more reliably suppress the flow of heat between the adjacent accommodation spaces 70 in each partition portion. Therefore, the substrate accommodated in one accommodation space 70 can appropriately dissipate heat without being affected by the heat radiation from the substrates accommodated in the adjacent accommodation spaces 70 across the partition portion. For example, the heat from the power supply board 60 in which the power supply unit 42 having a particularly large calorific value is arranged to the light source control board 66 housed in the third storage space 73 is divided by the first partition portion 81 formed of resin. Therefore, it is possible to prevent the temperature of the third accommodation space 73 from rising due to heat dissipation from the power supply board 60, and it is possible to appropriately dissipate heat from the light source control board 66.

Since the panel control unit 50 generates less heat than the power supply unit 42, the control unit 44, the double speed unit 46, and the light source control unit 48, the panel control unit 50 is different from the power supply board 60, the control board 62, the double speed board 64, and the light source control board 66. It is located on a panel control board 68, which is another independent board. Therefore, the panel control board 68 is thermally separated from the heat-generating components contained in the power supply board 60, the control board 62, the double-speed board 64, and the light source control board 66, which generate a large amount of heat, and the components included in the panel control board 68. The temperature rise can be suppressed.

In the present embodiment, the power supply board 60 is arranged on the back surface side of the substrate 20 on the forward side portion of the left-right direction Y2, and the control board 62 is arranged on the opposite direction side portion of the left-right direction Y2. However, it is not limited to this. The power supply board 60 may be arranged in the portion on the opposite side of the left-right direction Y2, and the control board 62 may be arranged in the portion on the forward direction side in the left-right direction Y2.

Further, similarly to the double speed substrate 64 and the light source control substrate 66, a sheet-shaped heat radiating member having thermal conductivity is brought into contact with each of the substrate 20 and the power supply substrate 60 between the substrate 20 and the power supply substrate 60. It may be placed in. As a result, the heat generated in the power supply board 60 is dissipated to the substrate 20 via the heat radiating member, and the temperature rise of the components included in the power supply board 60 can be suppressed more reliably. Similarly, a sheet-shaped heat radiating member having thermal conductivity may be arranged between the substrate 20 and the control substrate 62 so as to be in contact with each of the substrate 20 and the control substrate 62. As a result, the heat generated in the control board 62 is dissipated to the base 20 via the heat radiating member, and the temperature rise of the components included in the control board 62 can be suppressed more reliably. Further, the LSI or the like of the control unit 44 included in the control board 62 may be provided with a metal plate-shaped heat sink. As a result, it is possible to further promote heat dissipation from the LSI or the like while suppressing an increase in thickness, and it is possible to suppress an increase in temperature.

The double speed board 64 and the light source control board 66 are arranged side by side in the vertical direction Y1, and in the example shown in FIG. 5, the double speed board 64 is arranged below the light source control board 66, but the present invention is not limited to this. .. The double speed substrate 64 may be arranged above the light source control substrate 66.

Each partition may be formed with a hole for passing wiring connecting each substrate. For example, wiring for connecting the control board 62 and the double speed board 64 is provided in the second partition portion 82 that separates the second storage space 72 in which the control board 62 is housed and the fourth storage space 74 in which the double speed board 64 is housed. A hole for passing may be formed.

Further, the first partition portion 81, the second partition portion 82, the third partition portion 83, and the fourth partition portion 84 may be integrally molded together with the back cover 30. In the case of integrally molding, for example, each partition portion is provided so as to extend from the back cover 30 toward the substrate 20. With such a configuration, it is not necessary to provide a structure for attaching each partition to the substrate 20 or the back cover 30, and the number of parts can be reduced, so that the manufacturing cost can be reduced and the assemblability can be improved. Further, if the first partition portion 81, the second partition portion 82, the third partition portion 83, the fourth partition portion 84, and the back cover 30 are made of resin, they can be easily integrally formed, and the heat between the accommodation spaces 70 can be easily formed. It is also possible to suppress the movement and suppress the temperature rise of each accommodation space 70.

The number of intake / exhaust ports 90 provided in the back cover 30 described above is an example, and is not limited to this. For example, in the example shown in FIG. 8, two third intake / exhaust ports 93 communicating with the outside of the back cover 30 from the third accommodation space 73 accommodating the light source control board 66 are provided, but if there is at least one. good.

Embodiment 2.
Next, the second embodiment will be described with reference to FIGS. 9 and 10. FIG. 9 is a rear view schematically showing the structure on the back surface side of the lower portion of the substrate 20 of the image display device 2 in the present embodiment. In FIG. 9, similarly to FIG. 5, the display unit 10 and the back cover 130 are omitted. FIG. 10 is a schematic cross-sectional view taken along the line XX of FIG. It should be noted that the description of the part of the present embodiment similar to that of the first embodiment will be omitted.

In the video display device 1 of the first embodiment, the double speed board 64 and the light source control board 66 are arranged side by side in the vertical direction Y1, whereas in the video display device 2 of the present embodiment, the double speed board 64 and the light source control board 66 are arranged side by side. It differs from the light source control board 66 in that it is arranged side by side in the front-rear direction Y3.

In the present embodiment, one of the double speed substrate 64 and the light source control substrate 66 is arranged between the other substrate and the substrate 20. In the example shown in FIGS. 9 and 10, the light source control substrate 66 is arranged between the double speed substrate 64 and the substrate 20. That is, the light source control board 66 is arranged in front of the double speed board 64, that is, on the forward side in the front-rear direction Y3. Further, the third accommodation space 173 for accommodating the light source control substrate 66 is formed by the substrate 20, the back cover 130, the first partition portion 181 and the second partition portion 182, the third partition portion 183 and the fourth partition portion 184. There is. The fourth accommodation space 174 accommodating the double speed substrate 64 is formed by a back cover 130, a first partition portion 181 and a second partition portion 182, a third partition portion 183, and a fourth partition portion 184. Unlike the first embodiment, the third partition portion 183 in the present embodiment is formed in a plate shape extending in the vertical direction Y1 and the horizontal direction Y2. The third partition portion 183 accommodates the space surrounded by the substrate 20, the back cover 130, the first partition portion 181 and the second partition portion 182, and the fourth partition portion 184 in the front-rear direction Y3 with the third accommodation space 173 and the fourth accommodation space 173. It is divided into space 174.

In the third accommodation space 173, the light source control substrate 66 is attached to the substrate 20 while being insulated from the substrate 20 by an attachment member (not shown). Further, as the intake / exhaust port 90, the back cover 130 is provided with a third intake / exhaust port 193 that communicates with the outside from the third accommodation space 173. The third intake / exhaust port 193 is provided at a position above the light source control board 66 in the back cover 130. Further, in the present embodiment, the third intake / exhaust port 193 is continuously provided with the fourth intake / exhaust port 194, which will be described later.

Further, in the present embodiment, the image display device 2 further includes a sheet-shaped heat radiating member 103 having thermal conductivity. The heat radiating member 103 is a heat radiating sheet made of, for example, silicone or the like, like the first heat radiating member 101. The heat radiating member 103 is arranged between the substrate 20 and the light source control substrate 66, and is in contact with each of the substrate 20 and the light source control substrate 66.

In the fourth accommodation space 174, the double speed substrate 64 is attached to the third partition portion 183 while being insulated from the substrate 20 and the light source control substrate 66 by a mounting member (not shown). Further, as the intake / exhaust port 90, the back cover 130 is provided with a fourth intake / exhaust port 194 that communicates with the outside from the fourth accommodation space 174. In the example of FIG. 10, the back cover 130 is provided with two fourth intake / exhaust ports 194, one is provided at a position above the double speed board 64, and the other one is on the back side of the double speed board 64. It is provided at a position facing the double speed substrate 64. The fourth intake / exhaust port 194 provided at a position above the double-speed substrate 64 is continuously provided with the third intake / exhaust port 193.

The fifth accommodation space 175 for accommodating the panel control substrate 68 is formed by the substrate 20, the back cover 30, the first partition portion 181 and the second partition portion 182, and the fourth partition portion 184. In the present embodiment, since the double speed substrate 64 and the light source control substrate 66 are arranged side by side in the front-rear direction Y3, the fifth accommodation space 175 can be expanded in the vertical direction Y1. Therefore, in addition to the panel control board 68, the storage unit 52 is housed in the fifth storage space 175. In the fifth accommodation space 175, the panel control board 68 and the storage unit 52 are arranged side by side in the vertical direction Y1. In the example shown in FIGS. 9 and 10, the panel control board 68 is arranged above the storage unit 52. The panel control substrate 68 and the storage unit 52 are each attached to the substrate 20 while being insulated from the substrate 20 by an attachment member (not shown). Further, as the intake / exhaust port 90, the back cover 130 is provided with a fifth intake / exhaust port 195 that communicates with the outside from the fifth accommodation space 175. In the example shown in FIG. 8, the back cover 130 is provided with two fifth intake / exhaust ports 195, one of which is on the back side of the panel control board 68 and the storage unit 52 to the panel control board 68 and the storage unit 52. The other one is provided at a position facing each other, and the other one is provided at a position below the storage unit 52.

As described above, the image display device 2 according to the present embodiment further includes a sheet-shaped heat radiating member 103 having thermal conductivity, and one of the light source control substrate 66 and the double speed substrate 64 is the other. The heat radiating member 103 is arranged between the substrate and the substrate 20, and the heat radiating member 103 is arranged between the substrate 20 and one of the substrates, and is in contact with each of the substrate 20 and one of the substrates. The intake / exhaust port 90 communicating with the accommodation space is provided in the back cover 130 at a position facing the other substrate.

In this way, by arranging one of the light source control board 66 and the double speed board 64 between the other board and the base 20, the back cover 130 covering the light source control board 66 and the double speed board 64 is vertically oriented. The size of Y1 can be reduced. Further, even with such an arrangement, the heat generated by one of the substrates can be dissipated to the substrate 20 via the heat radiating member 103, so that the intake and exhaust air communicate with the accommodation space for accommodating the one substrate. Even when the amount of heat radiated from the mouth 90 is not large, it is possible to suppress the temperature rise of the parts contained in one of the substrates. In addition, since the intake / exhaust port 90 communicating with the accommodation space for accommodating the other substrate is provided at a position facing the other substrate in the back cover 130, external air taken in from the intake / exhaust port 90 can be taken in. Since the heat discharged from the other substrate is discharged to the outside again, the heat generated from the other substrate can be dissipated to the outside. Further, in the present embodiment, the intake / exhaust port 90 communicating with the accommodation space accommodating the other substrate is provided not only at the position facing the other substrate in the back cover 130 but also at the position above the other substrate. Therefore, the heat generated from the other substrate can be more effectively dissipated to the outside by the air flow generated between the two intake / exhaust ports 90.

In the present embodiment, the light source control substrate 66 is arranged between the double speed substrate 64 and the substrate 20, but the present invention is not limited to this. The double speed substrate 64 may be arranged between the light source control substrate 66 and the substrate 20.

It is also included in the scope of the technical idea shown in the embodiment that each embodiment is appropriately combined, modified or omitted.

1, 2 video display device, 10 display unit, 12 bezel, 14 light source, 16 panel, 20 substrate, 30, 130 back cover, 32 stand, 40 electrical unit, 42 power supply unit, 44 control unit, 46 times speed unit, 48 light source Control unit, 50 panel control unit, 52 storage unit, 60 power supply board, 62 control board, 64x speed board, 66 light source control board, 68 panel control board, 70 accommodation space, 71 first accommodation space, 72 second accommodation space, 73, 173 3rd accommodation space, 74, 174 4th accommodation space, 75, 175 5th accommodation space, 81, 181 1st partition, 82, 182 2nd partition, 83, 183 3rd partition, 84, 184 4th partition, 90 intake / exhaust port, 91 1st intake / exhaust port, 92 2nd intake / exhaust port, 93, 193 3rd intake / exhaust port, 94, 194 4th intake / exhaust port, 95, 195 5th intake / exhaust port Mouth, 101 1st heat radiation member, 102 2nd heat radiation member, 103 heat radiation member, Y1 vertical direction, Y2 horizontal direction, Y3 front-back direction.

Claims (5)

A display unit that has a light source and displays images,
A metal substrate that covers the back surface of the display unit and extends in the vertical direction and in the horizontal direction orthogonal to the vertical direction.
A control unit that performs video processing on the input video input signal and outputs the video data that has undergone the video processing.
A double speed unit that processes the video data output from the control unit so that it can be displayed smoothly and outputs it as a video output signal.
A light source control unit that drives the light source based on the video output signal output from the double speed unit.
A power supply unit that converts the electric power supplied from the external power source and supplies the converted electric power to the control unit.
A power supply board on which the power supply unit is arranged and arranged on one end side in the left-right direction on the back surface side of the substrate.
A control board on which the control unit is arranged and arranged on the other end side in the left-right direction on the back surface side of the substrate.
A light source control board on which the light source control unit is arranged and arranged between the control board and the power supply board on the back side of the substrate in the left-right direction.
A double-speed substrate on which the double-speed portion is arranged and arranged between the control board and the power supply board on the back side of the substrate in the left-right direction.
A back cover that covers the back surface of the substrate and accommodates the control substrate, the power supply substrate, the double speed substrate, and the light source control substrate between the substrate and the substrate.
Equipped with
The space between the substrate and the back cover is divided into a plurality of independent accommodation spaces, and the control board, the power supply board, the double speed board, and the light source control board are housed in different accommodation spaces. ,
An image display device provided with an intake / exhaust port that communicates from the accommodation space to the outside of the back cover in the back cover corresponding to each of the accommodation spaces. Further provided with a sheet-shaped first heat radiating member and a second heat radiating member having thermal conductivity,
The light source control board and the double speed board are arranged side by side in the vertical direction.
The first heat dissipation member is arranged between the substrate and the light source control board, and is in contact with each of the substrate and the light source control board.
The image display device according to claim 1, wherein the second heat radiating member is arranged between the substrate and the double-speed substrate and is in contact with each of the substrate and the double-speed substrate. Further equipped with a sheet-shaped heat dissipation member with thermal conductivity,
One of the light source control board and the double speed board is arranged between the other board and the board.
The heat radiating member is arranged between the substrate and the one substrate, and is in contact with each of the substrate and the one substrate.
The image display device according to claim 1, wherein the intake / exhaust port communicating with the accommodation space for accommodating the other substrate is provided at a position facing the other substrate in the back cover. Between the substrate and the back cover, as the accommodation space, a first accommodation space for accommodating the power supply substrate, a second accommodation space for accommodating the control substrate, and a third accommodation space for accommodating the light source control substrate. A space and a fourth accommodation space for accommodating the double-speed substrate are provided.
A first partition portion that forms the first accommodation space together with the substrate and the back cover and partitions the first accommodation space from the third accommodation space and the fourth accommodation space.
A second partition portion that forms the second accommodation space together with the substrate and the back cover and partitions the second accommodation space from the third accommodation space and the fourth accommodation space.
A third partition that divides the space surrounded by the substrate, the back cover, the first partition, and the second partition into the third accommodation space and the fourth accommodation space.
Further prepare
The video display device according to any one of claims 1 to 3, wherein the first partition portion, the second partition portion, and the third partition portion are molded of resin. The image display device according to claim 4, wherein the back cover, the first partition portion, the second partition portion, and the third partition portion are integrally molded.

Images