KR102590353B1 - Case for display panel having emi reducing structure and display device comprising the same - Google Patents

Abstract

The present invention relates to a case for a display device having an EMI reduction structure and a display device including the same.
The case for a display device according to the present invention provides a structure in which the cover bottom and the back cover can be connected without separate additional parts, resulting in reduced work hours and production costs.

Description

A case for a display device having an EMI reduction structure and a display device including the same {CASE FOR DISPLAY PANEL HAVING EMI REDUCING STRUCTURE AND DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a case for a display device and a display device including the same, and more specifically, to a case for a display device having an EMI (Elector Magnetic Interference) reduction structure and a display device including the same.

As the information society develops, the demand for display devices in various forms is increasing, and in response to this, LCD (Liquid Crystal Display), PDP (Plasma Display Panel), ELD (Electro Luminescent Display), VFD (Vacuum Fluorescent Display), etc. Flat-type display devices using various display panels are being researched and commercialized.

In addition, recently, due to the advancement of the display panel manufacturing process, display panels and display devices including them have been actively made thinner and lighter, and not only technical aspects but also design aspects are being emphasized.

1 is a block diagram showing the structure of a general display device.

A display device is a display device that integrates a display panel (DP) containing an image, a backlight unit (BLU) that provides a surface light source to the display panel (DP), and the display panel and the backlight unit. Includes case.

The case for the display device is a guide panel (GP) that acts as a frame and a case top that is coupled to the front of the guide panel (GP) and fixes the display panel (DP) between the guide panel (GP) and the guide panel (GP). Top, CT), a cover bottom (CB) that is coupled to the back of the guide panel (GP) and fixes the backlight unit (BLU) between the guide panel (GP), and the cover bottom (CB) Includes a back cover (BC) that covers the back.

Hereinafter, the side of the display panel on which images are displayed is called the front, the side opposite the front is called the back, and the remaining four sides connecting the front and the side are called the sides.

Looking at the coupling structure of the display device case, the case top (CT), guide panel (GP), and cover bottom (CB) are integrally fastened from the side using fastening screws (S).

The exterior of the assembled display device case has the case top (CT) exposed on the front side, the cover bottom (CB) and guide panel (GP) exposed on the back side, and the guide panel (GP) and cover bottom (GP) on the side. CB) is exposed.

A display module is a state in which a display panel and a backlight unit are integrated and assembled in a case for a display device.

The display module is fastened with screws (S) on the side, and the guide panel (GP) and cover bottom (CB) are exposed on the back, so the appearance is not good.

Therefore, when assembling a display device such as a TV set or monitor, the back cover (BC) is coupled to the back of the display module.

A system board, power board, etc. are placed between the cover bottom (CB) and the back cover (BC).

The back cover BC has an open front shape and forms the exterior of the back and side surfaces of the display device.

In accordance with the trend of lighter and thinner display devices, the case top (CT) and cover bottom (CB), which make up the case for the display device, are manufactured by press forming a thin metal material.

In the case of guide panels (GP), due to their complex shape, they are generally manufactured from synthetic resin using an injection molding method. Additionally, the guide panel (GP) is generally manufactured from an insulating material.

Meanwhile, EMI (Electro Magnetic Interference) refers to interference with reception of a desired electronic signal due to unnecessary electromagnetic signals or electromagnetic noise. As the application fields of precision electronic devices have expanded due to the development of precision electronic devices, it is known that electromagnetic interference generated from these devices causes radio noise interference, mutual malfunction of electronic devices, and adverse biological effects on living organisms such as the human body.

The display device includes driving semiconductor chips, and since they are driven using high-frequency signals, EMI is generated and emitted from the driving semiconductor chips.

One way to reduce EMI generated from a display device is to stabilize the ground.

In the case of a display device, a structure is applied in which the printed circuit board is grounded on the cover bottom (CB), which is a metal plate, and the cover bottom (CB) is then connected to the back cover (BC).

Figure 2 is a view showing the back of the display device before assembling the back cover.

As shown, the back of the display module is assembled with a guide panel (GP) and cover bottom (CB), and printed circuit boards (B) and speakers (S) are attached to the cover bottom (CB). . The printed circuit board (B) is functionally a system board and a power board.

Conventionally, a separate conductive gasket (G) was attached to electrically connect the cover bottom (CB) to the back cover (BC).

As shown, a printed circuit board (B) and a speaker (S) must be placed between the cover bottom (CB) and the back cover (BC), so the gap is spaced apart.

Therefore, a conductive gasket (G) having a thickness corresponding to the separation distance was attached to the cover bottom (CB), so that when the back cover (BC) was joined, the conductive gasket (G) was in contact with the cover bottom (CB). .

Meanwhile, the back cover (BC) had a structure that was fastened to the guide panel (GP).

Figure 3 is a view showing the guide panel and the cover bottom at the part where the rear cover is fastened, and Figure 4 is a cross-sectional view showing the fastened state of the part where the back cover is fastened.

First, referring to FIG. 3, the guide panel (GP) is provided with a fastening hole 10 for fastening to the back cover (BC), and the back cover (BC) interferes with the fastening hole 10 of the guide panel (GP). It had a structure that didn't work.

Referring to FIG. 4, the rear cover BC is fastened to the fastening hole of the guide panel GP through the fastening screw 12.

Additionally, when the back cover (BC) is fastened, the back cover (BC) comes into contact with the conductive gasket (G) attached to the cover bottom (CB).

However, in the work process, the process of attaching the conductive gasket (G) to the cover bottom (CB) of the display module was cumbersome, causing an increase in the number of work hours and an increase in manufacturing cost.

The purpose of the present invention is to provide a structure in which the back cover can be stably connected to the cover bottom of the display module when assembling a display device.

Another object of the present invention is to provide a display device in which the cover bottom of the display module can be connected to the back cover of the display device by fastening the back cover without additional structures such as a separate conductive gasket.

A case for a display device according to the present invention includes a guide panel disposed behind the display panel, a cover bottom coupled to the guide panel, and a back cover that surrounds the back of the cover bottom and is fastened to the guide panel. It provides a structure where the cover is connected by direct contact without any additional parts.

To this end, the cover bottom has a connection surface connected to the back cover, and the connection surface is arranged in parallel with the back cover, so that it can have a structure that is sandwiched between the guide panel and the back cover when assembling the back cover.

The case for a display device according to the present invention provides a structure in which the back cover is connected to the cover bottom simply by fastening the back cover when assembling the display device.

Therefore, since there is no need to attach a separate conductive gasket, the number of man-hours required during manufacturing can be reduced, which has the effect of lowering manufacturing costs.

In addition, the case for a display device according to the present invention has the effect of providing a stable connection between the cover bottom and the back cover by fastening the cover bottom and the back cover in surface contact.

1 is a block diagram showing the structure of a general display device.
Figure 2 is a view showing the back of the display device before assembling the back cover.
Figure 3 is a diagram showing the guide panel and cover bottom of the portion where the rear cover is fastened.
Figure 4 is a cross-sectional view showing the fastening state of the portion where the rear cover is fastened.
Figure 5 is a view showing the cover bottom of a case for a display device according to the first embodiment of the present invention.
Figure 6 is a diagram showing a coupled state between the cover bottom and the guide panel of the display device case according to the first embodiment of the present invention.
Figure 7 is a cross-sectional view showing a combined state of a display device to which a case for a display device according to the first embodiment of the present invention is applied.
Figure 8 is a cross-sectional view showing a combined state of a display device to which a case for a display device according to a second embodiment of the present invention is applied.
Figure 9 is a cross-sectional view showing a combined state of a display device to which a case for a display device according to a third embodiment of the present invention is applied.

Hereinafter, various embodiments of a display device case and a display device including the same according to an embodiment of the present invention will be described with reference to the drawings.

Hereinafter, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used only to distinguish one component from another.

Additionally, in the present invention, the display panel can be a variety of display panels such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), ELD (Electro Luminescent Display), VFD (Vacuum Fluorescent Display), and OLED (Organic Light Emitting Display). there is.

Terms or words used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, and the inventor may appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle that it can be done, it must be interpreted with meaning and concept consistent with the technical idea of the present invention. In addition, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so they cannot be replaced at the time of filing the present application. It should be understood that there may be various equivalents and variations.

Figure 5 is a view showing the cover bottom of the case for a display device according to the first embodiment of the present invention, and Figure 6 is a view showing the combined state of the cover bottom and the guide panel of the case for the display device according to the first embodiment of the present invention. This is the drawing shown.

When the display device case according to the present invention is assembled into a display device, the back cover (BC) of the display device is assembled and the back cover (BC) and the cover bottom (CB) of the display device case are connected to provide a structure. It is characterized by

The case for the display device includes a case top, guide panel, and cover bottom.

Due to its complex shape, the guide panel (GP) uses an injection molded product made of synthetic resin, and the case top (CT) and cover bottom (CB) use a thin metal plate.

Circuits for the operation of the display device must stabilize the ground to reduce EMI. They are primarily grounded to the cover bottom (CB) of the display device case, and the cover bottom (CB) is the back surface that finishes the exterior of the display device. A structure connected to the cover (BC) is applied. In other words, the cover bottom (CB) and the back cover (BC) must be connected.

However, a printed circuit board and a speaker for driving the display device must be placed between the cover bottom (CB) and the back cover (BC). Therefore, a separation gap exists between the cover bottom (CB) and the back cover (BC).

Conventionally, a structure was applied in which a conductive gasket was attached to the back of the cover bottom (CB) and when the back cover (BC) was fastened, the back cover (BC) came into contact with the conductive gasket (G).

The present invention provides a structure in which the cover bottom (CB) and the back cover (BC) can be stably connected without attaching a conductive gasket.

For this purpose, the present invention provides a cover bottom (CB) as shown in FIG. 5.

The cover bottom (CB) according to the first embodiment of the present invention is characterized by having a connection portion (100) in surface contact with the back cover (BC).

The cover bottom (CB) is manufactured from a metal plate using a method such as press molding.

This is in consideration of product thinness and cost reduction.

The cover bottom (CB) according to the present invention allows a metal plate to be manufactured through a press molding method in the same process as the conventional one, and provides a structure in which the cover bottom (CB) is stably connected to the back cover (BC). .

Additionally, the present invention provides a structure in which the cover bottom (CB) and the back cover (BC) can be connected without using separate additional parts (eg, a conductive gasket).

As shown, the case for a display device according to an embodiment of the present invention changes only the shape of the cover bottom (CB), and has a structure in which the cover bottom (CB) and the back cover (BC) are connected without separate additional parts. to provide.

The cover bottom (CB) of the display case according to an embodiment of the present invention includes a connection portion 100. When the back cover BC is fastened to the guide panel GP, the connecting portion 100 directly contacts the back cover BC to connect the cover bottom CB and the back cover BC.

The driving circuit of the display device is grounded to the cover bottom (CB), and the cover bottom (CB) is connected to the back cover (BC) that forms the exterior of the display device.

Both the cover bottom (CB) and the back cover (BC) are manufactured by press forming a metal sheet. The cover bottom (CB) and the back cover (BC) must be connected by contact. Therefore, it is desirable that the surface of the area where the cover bottom (CB) and the back cover (BC) come into contact with each other is not painted to prevent electricity supply.

Generally, the cover bottom (CB) is not painted, and even if it is painted, it is painted with a conductive material. On the other hand, the back cover (BC) is a part that forms the exterior of the display device and affects the exterior quality.

Therefore, in the case of the back cover (BC), painting is often done to improve corrosion resistance or improve appearance quality. However, the inner surface of the back cover (BC) in contact with the cover bottom (CB) faces inward, so even if painting is not performed, the exterior quality is not affected.

The connection portion 100 provided on the cover bottom (CB) may be disposed in the fastening hole 10 of the guide panel (GP). The guide panel (GP) is provided with fastening holes for fixing various components, but the fastening hole 10 in this specification refers to the fastening hole 10 for fastening the back cover (BC) to the guide panel (GP). do.

The connection part 100 includes a vertical surface 110 bent in the thickness direction of the display panel, and a connection surface 120 bent from the vertical surface 110 and overlapping the fastening hole 10.

When the back cover BC is fastened, the connection surface 120 is sandwiched between the guide panel GP and the back cover BC.

Therefore, when the back cover (BC) is fastened to the guide panel, the connection surface 120 comes into contact with the inner surface of the back cover (BC), and the guide panel (GP) and the back cover (BC) are connected. This structure has the effect of allowing the back cover (BC) and cover bottom (CB) to be connected without any additional parts simply by assembling the back cover (BC).

Figure 7 is a cross-sectional view showing a combined state of a display device to which a case for a display device according to the first embodiment of the present invention is applied.

The display device is made by attaching the system board and power board to the display module and assembling the back cover (BC).

At this time, the system board and power board are attached to the cover bottom (CB), which is the back of the display module.

The back cover (BC) is fastened to the guide panel (GP) of the display module. The guide panel (GP) is provided with a fastening hole (10) for fastening the back cover (BC).

After aligning the back cover (BC) with the guide panel, assemble the back cover (BC) using the fastening screws (12).

As described above, the display device according to the present invention is provided with a connection part 100 on the cover bottom CB, and the connection surface 120 of the connection part 100 is in contact with the rear cover BC.

As shown, when the back cover (BC) is fastened to the guide panel (GP), the connection surface () of the cover bottom (CB) is sandwiched between the back cover (BC) and the guide panel (GP) by the fastening screw. It is concluded in accordance with (12).

Accordingly, the connection surface 120 of the cover bottom CB is in close contact with the rear cover BC due to the fastening pressure of the fastening screw 12.

Figure 8 is a cross-sectional view showing a combined state of a display device to which a case for a display device according to a second embodiment of the present invention is applied.

The case for a display device according to the second embodiment of the present invention has a different structure of the connection portion 100-1 provided on the cover bottom (CB).

The connection portion 100-1 according to this embodiment includes a vertical surface 110 bent in the thickness direction of the display panel, a connection surface 130 bent in the vertical surface and disposed parallel to the back cover BC, It includes a curved surface 132 between the vertical surface 110 and the connection surface 130.

In the previous embodiment, the connection surface (120 in FIG. 7) had a bent shape to overlap the fastening hole of the guide panel (GP), but in the present embodiment, the connection surface 130 was disposed inward and formed the fastening hole 10. It is a structure that does not overlap with .

It is desirable that the curved surface 132 provides elastic force in a direction in which the connection surface 130 comes into close contact with the rear cover BC.

For this purpose, it is preferable that the height from the cover bottom (CB) to the connection surface 130 is greater than the distance between the cover bottom (CB) and the inner surface of the back cover (BC).

Conventionally, the conductive gasket (G) has a shape in which a conductor surrounds the outer surface of the core made of elastic material, and the thickness of the conductive gasket (G) is made larger than the gap between the cover bottom (CB) and the back cover (BC). Contact load was applied.

In this embodiment, the connection part 130 is provided with a curved surface 132 so that the curved surface 132 is compressed when the rear cover BC is fastened, so that the connection surface 130 is connected to the rear cover by the restoring force of the curved surface 132. This has the effect of applying a contact load that touches (BC).

Figure 9 is a cross-sectional view showing a combined state of a display device to which a case for a display device according to a third embodiment of the present invention is applied.

The case for a display device according to the third embodiment of the present invention has a different structure of the connection portion 100-2 provided on the cover bottom (CB).

The connection portion 100-2 according to this embodiment includes a vertical surface 110 bent in the thickness direction of the display panel, and a connection surface 140 bent from the vertical surface 110 and in contact with the rear cover BC. It was made with a curved surface.

In the case of the previous second embodiment, the connection surface (130 in FIG. 8) had a flat shape parallel to the back cover, but in the present embodiment, the connection surface 140 was formed as a convex curved surface toward the back cover (BC). will be.

In this embodiment, the connection surface 140 has a curved shape that is convex upward, and the connection surface 140 is compressed when the back cover (BC) is coupled, so that the connection surface 140 is stable to the back cover (BC). It was designed so that it could be contacted.

As described above, the case for a display device and the display device according to the present invention provide a structure in which the cover bottom contacts and connects to the back cover without any additional parts.

Therefore, when assembling the display device, there is no need to attach a separate conductive gasket to the back (cover bottom) of the display module.

Additionally, since the connection portion of the cover bottom comes into contact with the back cover by the fastening pressure of the fastening screw or by elastic force, it has the effect of stabilizing the connection between the cover bottom and the back cover.

The above-described embodiments should be understood in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the claims to be described later rather than the detailed description given above. In addition, the meaning and scope of the patent claims to be described later, as well as all changes and modifications derived from the equivalent concept, should be construed as being included in the scope of the present invention.

DP: Display panel
BLU: Backlight unit
CT: Case Top
GP: Guide panel
10: fastening hole
12: fastening screw
CB: Cover Bottom
BC: Back cover
100, 100-1, 100-2: Connection part
110: vertical plane
120, 130, 140: connection surface
132: curved surface

Claims (11)

It includes a guide panel disposed behind the display panel and supporting the display panel, a cover bottom coupled to the back of the guide panel, and a back cover fastened to the guide panel at the back of the cover bottom,
The cover bottom has a connection portion in contact with the rear cover,
The guide panel has a fastening hole to which the rear cover is fastened,
The connection portion has a connection surface overlapping the fastening hole,
The connection surface is sandwiched between the back cover and the guide panel when the back cover is fastened, and is in close contact with the back cover.
delete delete It includes a guide panel disposed behind the display panel and supporting the display panel, a cover bottom coupled to the back of the guide panel, and a back cover fastened to the guide panel at the back of the cover bottom,
The cover bottom has a connection portion in contact with the rear cover,
The connection part is
A vertical surface bent in the thickness direction of the display panel,
A connection surface bent in parallel with the rear cover,
A case for a display device comprising a curved surface between the vertical surface and the connection surface.
delete According to claim 4,
A case for a display device in which the curved surface is compressed by the back cover and provides elastic force in a direction in which the connection surface is in close contact with the back cover.
According to claim 6,
The connection surface is
A case for a display device bent in the vertical direction toward the inside of the display panel.
It includes a guide panel disposed behind the display panel and supporting the display panel, a cover bottom coupled to the back of the guide panel, and a back cover fastened to the guide panel at the back of the cover bottom,
The cover bottom has a connection portion in contact with the rear cover,
The connection portion includes a vertical surface bent in the thickness direction of the display panel,
Provided with a connection surface in contact with the rear cover,
A case for a display device wherein the connection surface is formed as a curved surface.
According to claim 8,
The connection surface is compressed by the rear cover,
A case for a display device in which elastic force is applied in a direction in which the connection surface is in close contact with the rear cover.
a display panel,
a backlight unit providing a surface light source to the display panel;
Claim 1, comprising a guide panel disposed behind the display panel and supporting the display panel, a cover bottom coupled to the back of the guide panel, and a back cover fastened to the guide panel at the back of the cover bottom. , a case for the display device of any one of claims 4, 6 to 9, and
A display device including a driving circuit that drives the display device.
According to claim 10,
The driving circuit part is grounded to the cover bottom,
The cover bottom is connected to the rear cover of the display device.

Images