CN215527086U

CN215527086U - Display device

Info

Publication number: CN215527086U
Application number: CN202121001040.XU
Authority: CN
Inventors: 天野宏
Original assignee: Sharp NEC Display Solutions Ltd
Current assignee: Sharp NEC Display Solutions Ltd
Priority date: 2020-05-13
Filing date: 2021-05-11
Publication date: 2022-01-14
Anticipated expiration: 2031-05-11
Also published as: JP2021179524A

Abstract

The utility model provides a display device. In the display device, it is made possible to cool the function expansion unit while suppressing the influence of heat of the function expansion unit mounted on the expansion slot on the temperature rise of other circuit components of the display device. A display device is provided with: a display device main body having an internal space (21) and a vent (22) connecting the internal space (21) and an external space; an expansion slot (3) which is provided in an internal space (21) of the display device main body and to which a function expansion unit (10) is detachably attached; an air duct (4) provided in the internal space (21) of the display device main body and extending from the expansion slot (3) to the air vent (22); and a fan (5) that forcibly causes air to flow from the expansion slot (3) to the air vent (22) in the air duct (4).

Description

Display device

Technical Field

The present invention relates to a display device.

Background

Patent document 1 discloses a display device (image display apparatus) in which air is forcibly circulated by a plurality of fans in an internal space of a sealed casing to transfer heat of a light source and a substrate provided in the casing to the air, thereby cooling the light source and the substrate. In the display device of patent document 1, the heat of the air circulating in the internal space is discharged to the outside of the case by the heat sink (heat discharging fin) exposed to both the internal space of the case and the outside of the case.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2007 & 052951

There is a display device provided with an expansion slot to which a function expansion unit having various functions (for example, a television tuner function, a communication function, and the like) is detachably attached in order to expand the functions of the display device. In such a display device, the function expansion unit mounted in the expansion slot is disposed inside the display device and generates heat by operation. When the function expanding unit that generates heat is cooled by the method described in patent document 1, air having heat associated with the cooling of the function expanding unit circulates inside the display device and flows to other circuit components (for example, a power supply board, a control board, and the like) of the display device, and therefore, the temperature rise of the other circuit components is affected.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device capable of cooling a function expanding unit while suppressing an influence of a temperature rise on other circuit components.

One aspect of the present invention is a display device including: a display device main body having an internal space 21 and a vent 22 connecting the internal space 21 and an external space; an expansion slot provided in an internal space of the display device main body, and to which a function expansion unit is detachably attached; an air duct disposed in an inner space of the display device main body and extending from the expansion slot to the air vent; and a fan which forcibly causes air to flow from the expansion slot toward the air vent in the air duct.

Effect of the utility model

According to the present invention, it is possible to cool the function expansion unit while suppressing the influence of heat of the function expansion unit mounted in the expansion slot on the temperature rise of other circuit components of the display device.

Drawings

Fig. 1 is a perspective view of a display device according to an embodiment of the present invention, as viewed from the back side.

Fig. 2 is an enlarged perspective view of the display device of fig. 1 with a back cover of the display device main body removed to show an expansion slot, an air duct, and a fan provided in an internal space of the display device main body, and a function expansion unit attached to the expansion slot.

Fig. 3 is an enlarged perspective view showing a state in which the function expansion unit is detached from the expansion slot in fig. 2.

Fig. 4 is a perspective view illustrating the air duct of fig. 2 and 3.

Fig. 5 is an enlarged perspective view illustrating a direction of air flow in the expansion slot and the air duct in the state illustrated in fig. 2.

Fig. 6 is a sectional view showing a main part of a display device according to another embodiment of the present invention.

Description of the reference symbols

1 display device

2 display device main body

21 inner space

22 vent

3 expansion slot

31 slot area

31A first slot area

31B second slot area

4 air duct

5 Fan

6 connector

7 Circuit substrate

10 function expansion unit

10A first function extension unit

10B second function extension unit

Detailed Description

An embodiment of the present invention will be described below with reference to fig. 1 to 5.

As shown in fig. 1 to 3, the display device 1 of the present embodiment includes a display device main body 2, an expansion slot 3, an air duct 4, and a fan 5.

As shown in fig. 1, the display device main body 2 is formed in a substantially plate shape, and includes an internal space 21 and a vent 22 connecting the internal space 21 and an external space. The display device main body 2 of the present embodiment includes a plate-shaped display panel 23 and a back cover 24 covering a back surface 23b (see fig. 2 and 3) side of the display panel 23, and the display panel 23 includes a display surface 23a on a front surface thereof for displaying images and videos. The internal space 21 of the display device main body 2 is mainly formed between the back surface 23b of the display panel 23 and the back cover 24. The vent 22 of the display device main body 2 is formed in the back cover 24. The vent 22 of the present embodiment is formed of many small holes densely formed in the back cover 24.

As shown in fig. 1 to 3, the expansion slot 3 is disposed in the inner space 21 of the display device main body 2. Various function extension units 10 are detachably mounted in the extension slot 3. The expansion slot 3 is open on a side surface 2c of the display device main body 2 along the rear surface of the display device main body 2 (the rear surface 23b of the display panel 23) and facing the first direction (the X-axis direction). This allows the function expansion unit 10 to be inserted into and removed from the expansion slot 3 in the first direction.

The expansion slot 3 of the present embodiment can be switched between a state in which only one slot region 31 for mounting one function expansion unit 10 is provided and a state in which two slot regions 31(31A and 31B) for mounting the function expansion units 10 are provided. In a state where the expansion slot 3 has two slot regions 31, the two slot regions 31 are arranged at intervals in a second direction (Y-axis direction) orthogonal to the first direction along the rear surface of the display device main body 2. The expansion slot 3 of the present embodiment will be specifically described below.

As shown in FIGS. 2 and 3, the expansion slot 3 has three guide portions 32 to 34. The three guide portions 32 to 34 extend in the first direction, respectively. The three guide portions 32 to 34 are arranged at intervals in the second direction. These guide portions 32 to 34 guide the function expansion unit 10 in the first direction when inserting and removing the function expansion unit 10 into and from the expansion slot 3, and hold the function expansion unit 10 attached to the expansion slot 3 from the second direction.

Of the three guide portions 32 to 34, two

end guide portions

32 and 33 located at both ends are fixed to the back surface side of the display device main body 2, and determine the range of the expansion slot 3 in the second direction. One middle guide portion 34 located between the two

end guide portions

32 and 33 among the three guide portions 32 to 34 is detachably fixed to the back surface side of the display device main body 2.

In a state where the intermediate guide portion 34 is detached from the display device main body 2, only one slot region 31 is formed between the both

end guide portions

32, 33. On the other hand, as shown in fig. 2 and 3, in a state where the intermediate guide 34 is attached to the display device main body 2, the slot area 31 is divided into two by the intermediate guide 34. That is, the three guide portions 32 to 34 form two slot regions 31(31A, 31B) arranged in the second direction.

The connector 6 connected to the function expansion unit 10 attached to the expansion slot 3 is provided in the internal space 21 of the display device main body 2. The connector 6 is disposed at an end portion on the front side (X-axis negative direction side) in the insertion direction of the function expansion unit 10 in the expansion slot 3. In the present embodiment, the two connectors 6 are arranged with a space in the second direction so as to correspond to the two slot regions 31, respectively. The connector 6 is mounted on the circuit board 7 disposed on the rear surface 23b side of the display panel 23.

The function expansion unit 10 expands the function of the display device 1 by connecting to the connector 6. The function extension unit 10 may be, for example, SDM-L, SDM-S, Raspberry Pi, or the like, which is a Smart Display Module (Smart Display Module) of Intel (Intel) corporation. In the present embodiment, the first function expansion unit 10A (for example, a Raspberry Pi) attached to the first slot region 31A of the expansion slot 3 has a heat sink 11 having a large number of heat dissipation fins (not shown). On the other hand, the second function expansion unit 10B (e.g., SDM-S) mounted to the second slot region 31B of the expansion slot 3 has a cooling fan 12 for cooling itself in place of the heat sink 11.

As shown in fig. 1 to 3, the air duct 4 is disposed in the internal space 21 of the display device main body 2 and extends from the expansion slot 3 to the air vent 22 of the display device main body 2. That is, the air duct 4 is formed to guide air from the expansion slot 3 to the air vent 22 of the display device main body 2 by opening both ends thereof to the expansion slot 3 side and the air vent 22 side.

The air duct 4 of the present embodiment extends from the expansion slot 3 in the arrangement direction (Y-axis direction) of the two slot regions 31 to reach the air vent 22. The air duct 4 is disposed adjacent to both of the two slot regions 31.

As shown in fig. 2 and 3, the end (base end) of the air duct 4 on the expansion slot 3 side opens only in the first slot region 31A located at a position away from the air vent 22 of the two slot regions 31. In the present embodiment, the proximal end of the air duct 4 opens only in the first slot region 31A in a state where the second function expansion unit 10B is attached to the second slot region 31B located in the vicinity of the vent 22, and the proximal end of the air duct 4 opens in both the first slot region 31A and the second slot region 31B in a state where the second function expansion unit 10B is not attached to the second slot region 31B. This point will be specifically described below.

A first opening 41 that opens into the first slot region 31A and a second opening 42 that opens into the second slot region 31B are formed at the base end portion of the air duct 4. The first opening 41 is formed so as not to be blocked by the first function expansion unit 10A even when the first function expansion unit 10A is attached to the first slot region 31A. On the other hand, the second opening 42 is formed smaller than the first opening 41, and is formed so as to be closed by the second function extension unit 10B in a state where the second function extension unit 10B is attached to the second slot region 31B.

The air duct 4 may be disposed to overlap with the expansion slot 3 in the thickness direction (Z-axis direction) of the display device main body 2, for example. The air duct 4 of the present embodiment is disposed at the end portion on the front side (X-axis negative direction side) in the insertion direction of the function expansion unit 10 in the expansion slot 3, similarly to the connector 6 described above. The first and

second openings

41 and 42 of the air duct 4 open toward the rear side (the positive X-axis direction side) in the insertion direction of the function expanding unit 10.

The duct 4 may be formed into a pipe shape that forms the air flow passage 45 separately, for example, but in the present embodiment, the duct is formed so as to form the air flow passage 45 together with the circuit board 7 provided on the rear surface 23b side of the display panel 23. Specifically, as shown in fig. 2 to 4, the air duct 4 includes a top plate portion 43 disposed at a distance from the circuit board 7, and a side plate portion 44 extending in the board thickness direction of the top plate portion 43 from a part of the peripheral edge of the top plate portion 43 toward the circuit board 7. Further, an air flow passage 45 is formed by at least a part of the tip end of the side plate portion 44 contacting the circuit board 7.

Here, since the side plate portion 44 is not formed at a position corresponding to the first opening portion 41, the opening area of the first opening portion 41 is large. In particular, the height of the first opening 41 in the thickness direction of the display device main body 2 is large. On the other hand, since the side plate portion 44 is formed at a position corresponding to the second opening portion 42, the opening area of the second opening portion 42 is smaller than the opening area of the first opening portion 41. In particular, the height dimension of the second opening 42 in the thickness direction of the display device main body 2 is small. By inserting the distal end portion of the second function extension unit 10B attached to the second slot region 31B into the second opening portion 42, the second opening portion 42 is closed, or the opening area of the second opening portion 42 becomes very small.

In the present embodiment, the two connectors 6 are disposed inside the air duct 4. The two connectors 6 mounted on the circuit board 7 face the first and

second slot regions

31A and 31B from the inside of the air duct 4 through the first and

second openings

41 and 42, respectively.

The fan 5 shown in fig. 2 to 3 forcibly flows air from the expansion slot 3 toward the air vent 22 of the display device main body 2 in the air duct 4. The fan 5 may be provided at any position in the extending direction of the air passage 4 (the Z-axis direction in fig. 1 to 3), but in the present embodiment is provided at an end portion (distal end portion) of the air passage 4 on the side of the vent 22.

Next, a cooling method of the function expanding unit 10 in the display device of the present embodiment will be described mainly with reference to fig. 5.

As shown in fig. 5, in the cooling method of the function expansion unit 10, the fan 5 is operated to guide the air with the heat of the function expansion unit 10 attached to the expansion slot 3 from the expansion slot 3 to the inside of the air duct 4 as indicated by an arrow D1. Then, the air guided into the air duct 4 is caused to flow into the air vent 22 as indicated by an arrow D2, and is discharged from the air vent 22 to the space outside the display device main body 2. This enables cooling of the function expanding unit 10.

Next, a cooling method in a case where the first and second

function expansion units

10A and 10B are mounted in the first and

second slot regions

31A and 31B of the expansion slot 3 will be described.

In a state where the second function expansion unit 10B is attached to the second slot region 31B, the second opening 42 of the air duct 4 is closed by the second function expansion unit 10B, or the opening area of the second opening 42 becomes very small. Therefore, when the fan 5 is operated, the air in the expansion slot 3 is guided into the duct 4 mainly through the first opening 41. Accordingly, in the first slot region 31A, as indicated by an arrow D1, air easily flows toward the inside of the air passage 4. Therefore, the air with the heat of the first function expanding unit 10A (particularly, the heat sink 11) mounted to the first slot region 31A is easily guided toward the inside of the air duct 4.

On the other hand, in the second slot region 31B, the flow of air toward the first slot region 31A as indicated by the arrow D3 is induced by the flow of air indicated by the arrow D1 in the first slot region 31A. Further, the flow of air indicated by arrow D3 can be further promoted by the operation of cooling fan 12 of second function expanding unit 10B attached to second slot region 31B. Therefore, the air with the heat of the second function expanding unit 10B mounted in the second slot region 31B is guided toward the inside of the air duct 4 via the first function expanding unit 10A (particularly, the heat sink 11).

As a result, both the first and second

function extension units

10A, 10B attached to the first and

second slot regions

31A, 31B can be cooled equally.

Next, a cooling method in a case where the first function expansion unit 10A is attached to the first slot area 31A of the expansion slot 3 and the second function expansion unit 10B is not attached to the second slot area 31B will be described.

In a state where the second function expanding unit 10B is not attached to the second slot region 31B, the second slot region 31B and the inside of the wind tunnel 4 are connected through the second opening 42. However, since the second opening 42 is smaller than the first opening 41, the flow rate of air passing through the second opening 42 is smaller than the flow rate of air passing through the first opening 41 when the fan 5 is operated. That is, when the fan 5 is operated, the air in the expansion slot 3 is easily guided into the duct 4 mainly through the first opening 41 as indicated by the arrow D1. Thereby, the air with the heat of the first function expanding unit 10A (particularly, the heat sink 11) mounted to the first slot region 31A is easily guided toward the inside of the air duct 4. Therefore, the first function extension unit 10A attached to the first slot area 31A can be efficiently cooled.

As described above, the display device 1 of the present embodiment includes the air duct 4 extending from the expansion slot 3 to the air vent 22 of the display device main body 2, and the fan 5 that forcibly causes air to flow from the expansion slot 3 to the air vent 22 in the air duct 4. Thus, in the cooling method of the display device 1 and the function expansion unit 10 according to the present embodiment, the heat (air with heat) of the function expansion unit 10 attached to the expansion slot 3 can be suppressed from drifting outside the expansion slot 3 and the air duct 4 in the internal space 21 of the display device 1. This makes it possible to cool the function expanding unit 10 while suppressing the influence of heat of the function expanding unit 10 on the temperature rise of other circuit components (for example, a power supply board, a control board, and the like) provided in the internal space 21 of the display device 1.

In the display device 1 according to the present embodiment, when the air passage 4 extends from the expansion slot 3 in the arrangement direction of the two slot regions 31 and reaches the air vent 22, the proximal end portion of the air passage 4 located on the expansion slot 3 side opens only in the first slot region 31A located at a position distant from the air vent 22 out of the two slot regions 31. Therefore, as compared with the case where the proximal end portion of the air duct 4 is open to both of the two slot regions 31, both of the two function expanding units 10 attached to the two slot regions 31 can be cooled equally. This point will be explained below.

For example, when the proximal end portion of the air duct 4 is open in both the two slot regions 31, when the fan 5 is operated, air flows more easily in the second slot region 31B closer to the air vent 22 than in the first slot region 31A farther from the air vent 22. Therefore, the second function expanding unit 10B attached to the second slot area 31B is easily cooled, and the first function expanding unit 10A attached to the first slot area 31A is not easily cooled. In contrast, when the base end portion of the air duct 4 is open only in the first slot region 31A, air easily flows into the first slot region 31A, and in the second slot region 31B, air flows toward the first slot region 31A. Therefore, both of the two function expanding units 10 attached to the two slot regions 31 can be cooled equally.

In the display device 1 of the present embodiment, the connector 6 connected to the function expansion unit 10 in a state where the function expansion unit 10 is attached to the expansion slot 3 is disposed inside the air duct 4. This can reduce the occupied area of the expansion slot 3 and the air duct 4 in the display device main body 2.

Although one embodiment of the display device and the method of mounting the function expanding unit of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified within a range not departing from the gist thereof.

In the present invention, the number of slot regions 31 in the expansion slot 3 is not limited to one or two, and may be three or more. In this case, the number of the guide portions 32 to 34 of the expansion slot 3 may be four or more (the number of the intermediate guide portions 34 may be two or more). Further, as in the above-described embodiment, the proximal end portion of the air passage 4 located on the expansion slot 3 side may be opened only in a part (one or more) of the slot regions 31 located on the side away from the air vent 22 in the second direction among the plurality of slot regions 31.

As shown in fig. 6, for example, the display device of the present invention may include at least a display device main body 2 having an internal space 21 and an air vent 22, an expansion slot 3 provided in the internal space 21, an air duct 4 provided in the internal space 21 and extending from the expansion slot 3 to the air vent 22, and a fan 5 for forcibly flowing air from the expansion slot 3 to the air vent 22 in the air duct 4.

Claims

1. A display device is characterized by comprising:

a display device main body having an internal space and a vent connecting the internal space to an outside space;

an expansion slot provided in an internal space of the display device main body, and to which a function expansion unit is detachably attached;

an air duct disposed in an inner space of the display device main body and extending from the expansion slot to the air vent; and

a fan to forcibly flow air from the expansion slot toward the air vent in the air duct.

2. The display device according to claim 1,

the expansion slot has two slot regions adjacently arranged and capable of respectively mounting the function expansion units,

the air duct reaches the air vent by extending from the expansion slot in the direction of arrangement of the two slot regions,

the end of the air duct on the expansion slot side is open only in the first slot region of the two slot regions located away from the air vent.

3. The display device according to claim 1 or 2,

the connector is disposed inside the air duct, is disposed in the internal space of the display device main body, and is connected to the function expansion unit in a state where the function expansion unit is mounted in the expansion slot.