WO2018235770A1

WO2018235770A1 - Display device and television receiver

Info

Publication number: WO2018235770A1
Application number: PCT/JP2018/023090
Authority: WO
Inventors: 晴貴宇野
Original assignee: シャープ株式会社
Priority date: 2017-06-22
Filing date: 2018-06-18
Publication date: 2018-12-27
Also published as: JP6475782B2; JP2019008050A

Abstract

This display device is configured such that, when a plurality of casings are to be partially stacked and fixed to a chassis for holding a display unit, the casings are stably fitted and fixed regardless of expansion/contraction of the casings. The display device is provided with: the display unit that displays a video; the chassis for holding the display unit; a first casing that covers the chassis; and a second casing, wherein the first casing has a plate part that is held between the chassis and the second casing, the second casing has a second boss that extends in the chassis direction, the plate part of the first casing has a boss reception section that corresponds to the second boss and a first boss that extends in the chassis direction, a boss abutment surface of the boss reception section is larger than the area of the tip of the second boss, and the shape of the boss abutment surface is longer in the longitudinal direction of the plate part.

Description

Display device and television receiver

One embodiment of the present invention relates to a display device for displaying an image and a housing structure of a television receiver, and more particularly, to a technique for improving a fitting margin with expansion and contraction of the housing.
Priority is claimed on Japanese Patent Application No. 2017-122128, filed Jun. 22, 2017, the content of which is incorporated herein by reference.

In recent years, thinning of display devices such as televisions has progressed. As one of the thinner structures, the display unit and the chassis that holds the display unit are in close contact with a cabinet, which is a housing, and a product that achieves the minimum necessary thickness without creating unnecessary gaps. It has been issued.
Further, there are cases where the case is divided into a plurality of cases for the purpose of improving the design, etc. In that case, there are many structures in which a part of the plurality of cases is fixed to the chassis while overlapping.
However, in the case of overlapping and fixing a part of a plurality of cases to the chassis, the case may expand and contract due to heat or the like, and the attachment position between the cases may be deviated or not fitted well. there were.
Therefore, even in such a case, there has been a demand for a structure in which a plurality of casings can be fitted and fixed smoothly.

JP 2013-243548 No.

Various techniques have conventionally been proposed for such problems. For example, a display device structure (see Patent Document 1) capable of suppressing deformation of a rear cabinet due to thermal expansion or thermal contraction while maintaining appearance quality and strength has been proposed and has become a well-known technology. More specifically, the display device includes a rectangular display unit, a chassis disposed on the rear side of the display unit, and frame-like front cabinets and rear cabinets disposed on the front side and the rear side of the display unit. . The rear cabinet has a plurality of fixing through holes through which screws for fixing to the chassis penetrate, and a plurality of rectangular divisions arranged in the long side direction and one side of each division And a connecting portion for connecting the segments to one another. Among the two connecting parts to be connected, a connecting through hole is juxtaposed in a direction along the one side in one connecting part, and the other connecting part passes through the connecting through hole. A plurality of insertion ports are formed in which the inserted screws are inserted. The dimension of the fixing through hole in the long side direction is larger than that of the screw. Further, as a structure for fixing a plurality of back cavities, a structure is disclosed in which one rib is received by the other rib receiving portion.

When fixing a plurality of cases, even if there is a positional deviation due to expansion and contraction of the cases, a structure for stably fixing between the cases is described. However, the structure in the case of fixing a plurality of housings to the chassis is not described, and the solution to the above problem has not been achieved.

According to one aspect of the present invention, when part of a plurality of housings is overlapped and fixed to the chassis, expansion and contraction of the housings causes displacement in the mounting positions between the housings and between the housings and the chassis. Even in the case, it aims at being able to be stably fitted and fixed.

A display device according to an aspect of the present invention includes a display portion for displaying an image, a chassis for holding the display portion, a first case covering the chassis, and a second case, the first case being a first case The body has a plate portion sandwiched between the chassis and the second case, and the second case has a second boss extending in the direction of the chassis, and the plate portion of the first case has a second boss The boss receiving portion corresponding to the first boss extending in the chassis direction, the contact surface of the boss receiving portion is wider than the area of the tip of the second boss, and the shape of the contact surface is It is characterized by being long in the longitudinal direction.

In addition, in the display device according to one embodiment of the present invention, the first boss and the second boss have through holes, and the first housing and the second housing are both provided to the chassis with a screw. It is characterized by being tightened.

Further, in the display device according to the aspect of the present invention, the through hole of the first boss is larger than the screw diameter of the screw, and the first casing is in the longitudinal direction of the plate portion with respect to the second casing. It is characterized in that it is slidable.

In the display device according to one embodiment of the present invention, the first housing covers a side surface of the chassis, and the second housing covers the rear surface of the chassis.

Further, a television receiver according to one aspect of the present invention includes a display device and a receiving unit that receives television broadcasting, and displays an image on the display device based on the television broadcasting received by the receiving unit. It is characterized in that it is done.

According to one aspect of the present invention, in the display device and the television receiver, when the plurality of housings are partially overlapped and fixed to the chassis that holds the display portion, the display is stable regardless of expansion and contraction of the housings. It exhibits the excellent effect of being able to be fitted and fixed.

FIG. 1 is an overall perspective view of an embodiment of a display device and a television receiver according to the present invention. FIG. 1 is an exploded view of a display device and a television receiver according to the present invention. It is a rear view of a display and a television receiver concerning the present invention. They are a back view of a back case of a display concerning the present invention, and a television receiver, and a perspective view. They are a front view, a back view, and a perspective view of a side case of a display device and a television receiver concerning the present invention. FIG. 2 is a back view and a perspective view of a display device and a television receiver chassis according to the present invention. It is an explanatory view of a boss receiving part of a display and a television receiver concerning the present invention. It is sectional drawing of IV-IV of the display apparatus and television receiver which concern on this invention. It is sectional drawing of the boss | hub vicinity of another Example of the display apparatus which concerns on this invention, and a television receiver.

In the display device and the television receiver according to one embodiment of the present invention, when the plurality of housings are partially overlapped and fixed to the chassis that holds the display portion, the display device and the television receiver are stably fitted regardless of expansion and contraction of the housings. In this case, the greatest feature is that it can be fixed. Hereinafter, an embodiment will be described based on the drawings.
The overall shapes of the display device and the television receiver shown in the present embodiment and the shapes of each part are not limited to the embodiments described below, and are within the scope of the technical idea of the present invention, ie, the same. It can be changed within the range of the shape and size which can exhibit the effect of Further, for the sake of description, the front indicates the surface viewed from the panel side of the product, and the back indicates the surface viewed from the back side of the product.
Example 1

The invention will be described according to FIGS. 1 to 8. FIG. 1 shows an overall perspective view of the present invention. FIG. 2 shows the same exploded view. FIG. 3A is a view of the rear case 40 viewed from the rear. FIG. 3B is a view of the display device 10 with the back case 40 removed and viewed from the back. 4A, 4B, and 4C are enlarged views of the front view of the rear case 40, the front perspective view of the rear case 40, and the front oblique view of the rear case 40, respectively. 5 (a), (b), (c) and (d) are respectively a front view of the side housing 30, a back view of the side housing 30, an enlarged view of a front oblique view of the side housing 30, a side housing FIG. 7 is an enlarged view of a back surface perspective of a body 30. 6A, 6B, and 6C are enlarged views of the rear surface view of the chassis 20, the rear surface perspective view of the chassis 20, and the rear surface oblique view of the chassis 20, respectively. FIG. 7A is a view showing the relationship between the boss receiving portion 34 of the side housing 30 and the second boss 41 of the back housing 40. As shown in FIG. FIG. 7B is a view showing the relationship in the case where the size of the contact surface 35 of the side surface housing 30 is the same as the size of the tip of the second boss 41 of the back surface housing 40. FIG. 8A is a cross-sectional view of the side surface portion 32 and the vicinity thereof of the side surface housing 30. FIG. FIG. 8 (b) is a cross-sectional view of FIG. 8 (a) when the side casing 30 is shifted.

The display device 10 receives an external video signal and displays an image on the display unit 12 including the display panel 11. A video signal from the outside is received by an input substrate provided inside the display device 10, and a predetermined signal processing is performed to output a generated drive signal. The display panel 11 is, for example, a liquid crystal panel, and displays an image based on a drive signal input from an input substrate. In the present embodiment, a rectangular display panel 11 which is longer in the left-right direction than in the vertical direction is used. The side casing 30 is an exterior member that covers the side of the display device 10. The shape of the side housing 30 will be described later. The stand 13 is a member for standing the display device 10 on a flat surface such as a floor surface or a desk top surface. The display device 10 may not be provided with the stand 13 and may be directly fixed to a wall or the like.

The display device 10 mainly includes a display unit 12, a chassis 20, a side housing 30 and a back housing 40. The display unit 12 is held by the chassis 20, and the display unit 12 and the chassis 20 are covered by the side housing 30 and the rear housing 40 from the rear surface side. The chassis 20, the side housing 30, and the rear housing 40 are fixed by screws 70 (FIG. 2). Depending on the product, a front frame which is a decorative board may be mounted in front of the chassis 20.

The display unit 12 is a video display portion including the display panel 11. In addition to the display panel 11, an optical sheet, a light guide plate, a reflective sheet, an LED substrate, a heat sink, and the like are included. The optical sheet is a resin sheet that diffuses light, converges, and the like, and has a structure in which a plurality of sheets such as a diffusion sheet and a prism sheet are stacked. The light guide plate is, for example, a rectangular acrylic plate having high transparency. A reflective sheet is provided on the rear surface of the light guide plate. The light guide plate and the reflection sheet have substantially the same shape as the display panel 11.

The LED substrate is a long plate-shaped circuit substrate having substantially the same length as the long side of the light guide plate. A plurality of white LEDs are mounted on one surface of the LED substrate. The heat sink is a metal plate with high thermal conductivity such as aluminum or copper. The left-right direction of the heat sink is approximately the same length as the long side of the light guide plate. The vertical direction of the heat sink is about one-quarter the length of the light guide in the vertical direction.

The display unit 12 is held by a chassis 20. As a configuration, the display panel 11, the optical sheet, the light guide plate, and the reflection sheet are arranged and held so that the reflection sheet is in contact with the chassis 20 in this order. The LED substrate is disposed at the end of the chassis 20.
The chassis 20 has a role of holding the display unit 12 and holding the functional components of the display device 10. On the back side of the chassis 20, a circuit board 80, a speaker 81 and the like are held. The circuit board 80 includes a control board, a tuner board, a power supply board, an image processing board, and the like. The speaker 81 is composed of a pair of tweeters and one woofer (FIG. 3 (b)).

The chassis 20 is composed of a flat portion having substantially the same size as the display panel 11 and a frame portion 21 standing on the front side around the flat portion. The material is a metal such as iron or aluminum. Around the flat portion, screw holes 23 for fixing the side housing 30 and the rear housing 40 are provided. There are about 7 in the long side and about 4 in the short side. A large number of screw holes for screwing the circuit board 80 and the speaker 81 are provided near the center of the flat portion. Also, in order to improve the overall rigidity, a plurality of stops are provided (FIG. 6). A plurality of screw holes 23 for fixing the side casing 30 are provided in a portion of the side casing 30 around the chassis 20 where the plate portion 31 abuts. There is a protrusion 22 around the screw hole 23. The amount of protrusion of the convex portion 22 is slight, and the purpose is to bring the plate portion 31 into contact with an appropriate amount (FIG. 6C). Further, the side housing 30 in contact can be easily slid with respect to the chassis 20 by the convex portion 22.

The side housing 30 is a cabinet that covers the chassis 20 from the side. The material is a resin such as ABS. It is comprised from the board part 31 and the side part 32, and as a whole, it is the shape of a square shape. The plate portion 31 abuts on the peripheral portion on the back surface side of the chassis 20, and the side surface portion 32 protrudes to the front side with respect to the plate portion 31 so as to cover the side surface of the chassis 20. The plate portion 31 overlaps the rear case 40, and after the display device 10 is completed, the plate portion 31 is covered by the rear case 40 and can not be seen from the surface. The side surface part 32 is a structure which is not covered by the back surface housing 40, becomes a part of the appearance of the display device 10, and can be seen from the surface even after the display device 10 is completed.

A plurality of first bosses 33 for contacting the chassis 20 are disposed on the front side of the plate portion 31 of the side casing 30 (FIG. 5C). The first boss 33 is provided to the plate portion 31 in order to fill a gap between the chassis 20 and the plate portion 31. In the center of the first boss 33, a through hole 36 for screwing is provided. The first bosses 33 are arranged seven on the long side of the side casing 30 and four on the single side.
When the first boss 33 is provided, in order to make the thickness of the cabinet uniform, it is necessary to provide a recess on the back surface side corresponding to the first boss 33 of the plate portion 31. Therefore, this recess is used as a configuration for receiving the second boss 41 of the rear housing 40. This recess is arranged as a boss receiving portion 34. The boss receiving portion 34 includes an abutment surface 35 and a through hole 36. The contact surface 35 is a portion to which the tip of the second boss 41 of the back housing 40 abuts. The shape of the abutment surface 35 is generally oval or oval. In the contact surface 35, the length in the longitudinal direction of the plate portion 31 is longer than the length in the width direction of the plate portion 31. The second boss 41 has a substantially cylindrical shape, and the relationship between the contact surface 35 and the tip of the second boss 41 has substantially the same dimension in the width direction of the plate portion 31, and the length of the plate portion 31 is In the direction, the contact surface 35 is longer than the tip of the second boss 41. Therefore, even if the side casing 30 and the back casing 40 have a dimensional deviation in the longitudinal direction of the plate portion 31, the second boss 41 can abut on the abutment surface 35 without any problem.
The abutment surfaces 35 of all the boss receptacles 34 disposed in the side housing 30 may be oval or oval, and only the abutment surfaces 35 of the boss receptacle 34 at the end of the plate 31 may be oval or oval, Other bosses may have a simple circular shape. It is determined by the degree of dimensional deviation between cavities.

The back housing 40 is a structure that covers the back of the display device 10. The material is a resin such as ABS. A plurality of second bosses 41 are disposed on the front side of the periphery of the rear housing 40, and abut on the plate portion 31 of the side housing 30. The second bosses 41 are arranged seven on the long side and four on the short side. A through hole 42 is provided at the center of the second boss 41, and the rear case 40 and the side case 30 are fastened together to the chassis 20 by means of screws 70. The through hole 42 is provided with an elliptical hole in order to correspond to the expansion and contraction of the rear case 40 (FIG. 4 (c)).

The relationship between the chassis 20, the side housing 30, and the rear housing 40 will be described with reference to FIGS. With respect to the chassis 20, the side casing 30 is disposed so as to cover the periphery of the chassis 20. Most of the side surfaces of the chassis 20 are covered by the side portions 32 of the side housing 30. By this structure, the screws on the side of the chassis 20 can be hidden, and a thin and high quality structure can be obtained. The rear case 40 is fixed to the chassis 20 and the side case 30 with screws 70 from the back side of the side case 30. The rear case 40 has a structure that covers only the rear side. Since the circuit board 80, the speaker 81, and the like are disposed on the back surface side of the chassis 20, the back housing 40 has a bowl-shaped structure in which a central portion bulges to the back surface (FIG. 2).
The structure in which the chassis 20, the side casing 30, and the rear casing 40 abut is shown in FIG. The lower side of the drawing is the front side of the display device 10, and the upper side of the drawing is the back side. The first boss 33 of the plate portion 31 of the side casing 30 abuts against the convex portion 22 of the chassis 20. The second boss 41 of the rear case 40 abuts against the contact surface 35 of the plate portion 31 of the side case 30. A screw hole 23 is provided at the center of the convex portion 22 of the chassis 20, and a through hole 36 is provided at the center of the first boss 33 of the plate portion 31 of the side chassis 30, and the second boss 41 of the rear chassis 40 is provided. There is a through hole 42 at the center of the. The through holes 36 and the through holes 42 are sufficiently larger than the diameter of the screw portion of the screw 70. The screw 70 co-fastens the rear case 40 and the side case 30 with respect to the chassis 20 (FIG. 8A).

Since the material of the side casing 30 and the back casing 40 is resin, expansion and contraction due to temperature are relatively large. Further, the coefficient of thermal expansion differs between the chassis 20 which is metal, the side housing 30 and the rear housing 40 which are resins. Moreover, even if it is resin, an expansion coefficient differs with ABS and a polycarbonate.
The dimensional design of the chassis 20, the side housing 30, and the rear housing 40 is generally performed along the normal temperature. Therefore, when assembling the display device 10 on the production line, the temperatures of the respective members differ depending on the season and the storage location of the cabinet, and from the difference in the thermal expansion coefficient, the chassis 20, the side housing 30, and the back The displacement of the mounting position of the housing 40 may be large.

FIG. 7 shows the relationship between the boss receiving portion 34 of the side housing 30 and the tip of the second boss 41 of the back housing 40. As shown in FIG. It is the figure which looked at the side surface housing 30 from the back side, and is expanding boss receiving part 34 vicinity. The plate portion 31 of the side surface housing 30 is provided with a boss receiving portion 34 to be a recess, and is configured to receive the second boss 41 of the rear surface housing 40. The contact surface 35 is a surface to which the tip of the second boss 41 of the rear housing 40 abuts. The shape of the contact surface 35 is larger in the longitudinal direction of the plate portion 31 and in the lateral direction on the sheet than in the width direction of the plate portion 31 and in the vertical direction on the sheet. The shape of the abutment surface 35 is generally oval or oval. The size of the tip of the second boss 41 of the rear housing 40 is indicated by a dotted line A. It can be seen that the contact surface 35 has a smaller gap in the width direction of the plate portion 31 and a larger gap in the longitudinal direction of the plate portion 31 than the size of the tip of the second boss 41 of the rear housing 40 .

FIG. 7A shows the case where the dimensional deviation between the side housing 30 and the rear housing 40 is small. The tip of the second boss 41 is disposed substantially at the center of the contact surface 35. When the rear housing 40 is contracted as compared with the side housing 30, a dimensional deviation occurs between the side housing 30 and the rear housing 40, and the rear housing 40 with respect to the contact surface 35. The dotted line A, which is the size of the tip of the second boss 41, is displaced leftward on the paper surface (FIG. 7B). If the size of the contact surface 35 is smaller than the size of the tip of the second boss 41 in the left-right direction, the second boss 41 can not enter the boss receiving portion 34, Alternatively, if it is attempted to force the insertion, the entire rear case 40 will be distorted, and the quality of the appearance of the product will be degraded. Since the contact surface 35 is large in the longitudinal direction of the plate portion 31 in which the displacement due to thermal expansion becomes large, the second boss 41 can be smoothly installed with respect to the boss receiving portion 34. It can. It is also conceivable to make the shape of the contact surface 35 larger in the width direction of the plate portion 31 as well, but if this is done, the function of positioning the boss receiving portion 34 decreases and the rear surface 30 The positional accuracy of the housing 40 is reduced, which results in the deterioration of the appearance of the product. Therefore, the shape of the contact surface 35 can not be blindly enlarged.

Thermal expansion and contraction also occur after product completion. When the product is used, the dimensions of the side housing 30 and the back housing 40 may gradually deviate due to changes in the ambient temperature and the internal temperature. Before the displacement occurs, the side casing 30 and the back casing 40 are at the positions shown in FIGS. 7A and 8A, but the side casing 30 is a chassis 20 and the back casing 40 by expansion. When it expands, it changes to a position like FIG.7 (b) and FIG.8 (b).
This is because the contact surface 35 of the boss receiving portion 34 is larger than the second boss 41 of the rear housing 40, and the through hole 36 of the side housing 30 is larger than the screw diameter of the screw 70. Since 30 is slidably fixed to the chassis 20 and the rear case 40, it is possible.
Although FIG. 7B shows an example in which the side surface housing 30 is shifted, the same applies to the case where the back surface housing 40 is drained.

Although the shape of the contact surface 35 has been described as an oval or oval (elliptical) as an example, it may be rectangular or the like as long as the same effect can be exhibited. Further, bosses in which the shape of the contact surface 35 is an ellipse or the like may be performed for all the boss receiving portions 34 of the side surface housing 30, or may be performed only on the most boss receiving portion 34. If all the boss receivers 34 of the side housing 30 are used, larger expansion and contraction can be coped with, and if only the end boss receivers 34 are used, positioning of the side housing 30 and the back housing 40 is performed. It is possible to cope with expansion and the like while performing with high accuracy.

Also, although the relationship between the side housing 30 and the rear housing 40 has been described as an example, in the configuration of the chassis 20 and the plurality of cavities, there is overlap between the plurality of cavities, and the chassis 20 and the plurality of cavities are fastened together. If it is the shape to be, it can be made the same structure as the present invention.

As described above, according to one aspect of the present invention, in the display device and the television receiver, when partially overlapping and fixing the plurality of housings on the chassis that holds the display portion, regardless of the expansion and contraction of the housings It exhibits an excellent effect that it can be stably fitted and fixed.
(Example 2)

Another embodiment will be described with reference to FIG. The same parts as in the first embodiment are omitted. FIG. 9 is a cross-sectional view for explaining the second embodiment.
According to the first embodiment, when a plurality of housings are partially overlapped and fixed to the chassis holding the display unit, the structure can be stably fitted and fixed regardless of the expansion and contraction of the housings. Can do.
However, depending on the cavity structure, a positioning and fitting structure without using the screw 70 has also been required.

FIG. 9 shows a structure in which the screw 70, the screw hole 23, the through hole 36, and the through hole 42 are removed from the first embodiment. Fixing of the chassis 20, the side housing 30, and the rear housing 40 is performed at a place other than the bosses. It may be a screw or a nail. The chassis 20, the side housing 30, and the rear housing 40 are in contact with each other by the convex portion 22, the first boss 33, the boss receiving portion 34, the second boss 41 and the like, and the positioning in the vertical direction in FIG. It will be. Next, positioning between the side housing 30 and the rear housing 40 is performed by the boss receiving portion 34 of the side housing 30 and the second boss 41 of the rear housing 40. Since the contact surface 35 of the side surface housing 30 is large in the longitudinal direction of the plate portion 31 as in the first embodiment, dimensional deviation occurs due to thermal expansion and contraction between the side surface housing 30 and the rear surface housing 40. Even if this is the case, the second boss 41 of the rear case 40 can be stably fixed to the contact surface 35 of the side case 30.

Thus, according to this structure, positioning between a plurality of cavities can be easily performed.

The display device according to the present invention is considered to have great industrial applicability with respect to a technique for improving the degree of fit of fitting accompanying expansion and contraction of a housing.

Claims

A display unit for displaying an image, and a chassis for holding the display unit;
Comprising a first case covering the chassis and a second case;
The first housing has a plate portion sandwiched between the chassis and the second housing,
The second housing has a second boss extending toward the chassis,
The plate portion of the first housing has a boss receiving portion corresponding to the second boss and a first boss extending in the chassis direction,
The abutment surface of the boss receiving portion is wider than the area of the tip of the second boss,
A display device characterized in that the shape of the contact surface is long in the longitudinal direction of the plate portion.
The first boss and the second boss have through holes, and the first casing and the second casing are fastened together with respect to the chassis by screws. The display device according to claim 1.
The through hole of the first boss is larger than the screw diameter of the screw,
The display device according to claim 2, wherein the first housing is slidable in a longitudinal direction of the plate portion with respect to the second housing.
The first housing covers the side surface of the chassis, and
The display device according to any one of claims 1 to 3, wherein the second housing is configured to cover a rear surface of the chassis.
A display device according to any one of claims 1 to 4;
And a receiver for receiving a television broadcast,
A television receiver characterized by displaying an image on the display device based on the television broadcast received by the receiver.