KR20150006634A

KR20150006634A - Display device

Info

Publication number: KR20150006634A
Application number: KR1020130080261A
Authority: KR
Inventors: 윤승현; 김포진; 권재욱; 최우혁; 류인근
Original assignee: 엘지전자 주식회사
Priority date: 2013-07-09
Filing date: 2013-07-09
Publication date: 2015-01-19

Abstract

A display panel; A sandwich honeycomb panel comprising a front thin plate positioned on the display panel side, a rear thin plate positioned on a rear surface of the front thin plate, and a honeycomb structure interposed between the front thin plate and the rear thin plate, the honeycomb structure comprising a plurality of hexagonal unit cells; And a metal plate coupled to the back surface of the honeycomb panel and having a drive board mounted thereon, wherein the honeycomb structure includes a heat flow path formed by partially removing the honeycomb structure, a first heat dissipation hole communicating with the flow path is formed, Wherein the metal plate includes a second heat dissipating hole connected to the first heat dissipating hole. The display device is capable of effectively discharging heat generated from the driving substrate and the display panel during driving, can do.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device using a sandwich honeycomb panel.

The structure of a display device using a conventional liquid crystal display panel and a plasma display panel is composed of respective glass panels constituting a basic screen and an intermediate frame rear cover. The intermediate frame serves as an intermediate frame for connecting various circuits for driving the display device and connecting the glass panel and the rear cover. On the other hand, the back cover secures the rigidity of the entire display device, efficiently radiates the heat radiated from the glass panel and the circuit to the outside, and at the same time requires an additional function of configuring the appearance of the display device.

In recent years, efforts to reduce the thickness of display devices have been continuously made, and fundamental attempts have been made to simplify the structure of existing display devices. Particularly, as the thickness of the display device is reduced, the mechanical stiffness of the rear cover is improved, and materials are being explored and improved to secure heat radiation characteristics.

Aluminum, which is a metal material, is typically used as a general material for a rear case of an existing display device, but the thickness of the case is extremely reduced, which limits the mechanical characteristics of the rear cover.

Especially, as the ratio of the contribution of the rear cover to the overall rigidity of the display device is increased, the mechanical characteristics of the back cover material itself are required, and it is difficult to secure the mechanical characteristics required for the conventional metal aluminum case. Particularly, as the size of the case becomes larger, such a problem may become more serious. In addition to metal aluminum as a material for the conventional rear cover, a new type of material is required to be excavated and devised.

The present invention relates to a display device having a sandwich honeycomb panel capable of minimizing bending deformation due to thermal expansion.

A display panel; A sandwich honeycomb panel comprising a front thin plate positioned on the display panel side, a rear thin plate positioned on a rear surface of the front thin plate, and a honeycomb structure interposed between the front thin plate and the rear thin plate, the honeycomb structure comprising a plurality of hexagonal unit cells; And a metal plate coupled to a back surface of the sandwich honeycomb panel and having a drive board mounted thereon, wherein the honeycomb structure includes a heat flow path formed by partially removing the first heat dissipation hole, the first heat dissipation hole communicating with the flow path, And the metal plate includes a second heat dissipating hole connected to the first heat dissipating hole.

The heat flow path may be formed in a vertical direction.

The heat flow path may include a plurality of first heat flow paths formed in a vertical direction and a second heat flow path connected to an upper end of the first heat flow path and formed in a horizontal direction.

The first heat-dissipating hole and the second heat-dissipating hole may include an inlet port connected to one end of the heat flow path and an outlet port connected to the other end of the inlet port.

And a cap covering an inlet port of the second heat dissipating hole and having a lower end opened.

The cap may cut the metal plate and press the upper portion of the cut-out in a backward direction so as to be integrated with the metal plate.

The drive substrate may be seated between the inlet and the outlet.

The inlet may be located at the bottom and the outlet at the top.

The second heat dissipating hole formed at a portion where the drive board is not seated may further include an auxiliary flow path connecting the inlet and the outlet.

The auxiliary flow path may be formed by cutting two portions of the metal plate and pressing the cut-away portion toward the back surface so as to be integrated with the metal plate.

At least one of a power supply coil, a main chip and a timing controller may be disposed at a position adjacent to the auxiliary flow path.

And a rear cover coupled to a back surface of the metal plate and having a vent hole corresponding to the second heat dissipating hole.

The vent hole may further include a filter for passing air through and blocking fine dust.

And a fan for assisting air circulation through the heat flow path.

The metal cover includes a board mounting portion on which the driving board is mounted and the rear cover is covered, and a skin cover which is exposed to the back surface of the display device. The board mounting portion and the skin cover may be integrally formed.

The display device according to at least one embodiment of the present invention can effectively discharge heat generated from the driving substrate and the display panel during driving, and can prevent the occurrence of warpage due to heat.

In addition, the sandwich honeycomb panel disposed on the rear surface of the display panel supports the display panel, thereby providing a lightweight display device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

1 is an exploded perspective view of a display device according to an embodiment of the present invention.
2 is a rear view showing one embodiment of the honeycomb structure of the display device of the present invention.
3 is a rear view according to an embodiment of a back panel of a display device of the present invention.
4 is a rear view according to an embodiment of the metal plate of the display device of the present invention.
5 and 6 are cross-sectional views of a metal plate of a display device according to an embodiment of the present invention.
7 is a rear view according to an embodiment of the rear cover of the display device of the present invention.
8 is an exploded perspective view according to another embodiment of the display device of the present invention.

Hereinafter, the sandwich honeycomb panel 130 of the display device 100 of the present invention will be described with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

1 is an exploded perspective view according to an embodiment of the display device 100 of the present invention. The display device 100 of the present invention comprises a display panel 110, a sandwich honeycomb panel 130, a middle frame 120, a metal plate 140, and a rear cover.

The display panel 110 outputs an image on a screen and is deformable in a predetermined range. The display panel 110 divides the image into a plurality of pixels, digitizes information such as color, lightness, and saturation per each pixel into an electrical signal, controls the color, brightness, and saturation of the pixels according to the electrical signals to emit light And outputs an image.

A flat panel display device capable of outputting such an image can be variously used as a liquid crystal display, a thin film transistor liquid crystal display, a plasma display, an organic light-emitting diode (OLED) display, and the like. Particularly, while the organic light emitting diode display device 100 is recently used, the structure is simplified, but a large amount of heat is generated, and a supporting structure is omitted in order to reduce the thickness.

The middle frame 120 may be used to close the side surface of the display device 100 and align the display panel 110 with the sandwich honeycomb panel 130. In recent years, a top case for covering the front and a rear case for covering the rear have been separately provided. However, recently, as the thickness of the display device has been reduced and the structure has been simplified and the size of the bezel has been reduced, And the middle frame 120 is used.

The sandwich honeycomb panel 130 is attached to the back surface of the display panel 110 to support the display panel 110. As the thickness of the display device 100 becomes thinner, the thickness of the rear panel supporting the display panel 110 becomes thinner. However, if the thickness is too small, there is a problem that the rigidity is deteriorated and easily deformed, and if the thickness is too thick, the weight and cost of the product increase.

In order to solve the above problem, the sandwich honeycomb panel 130, which can secure the rigidity and reduce the weight increase of the display device, can be used as the rear panel. As shown in FIG. 1, the sandwich honeycomb panel 130 has a three-layer structure of a pair of thin plates 131 and 132 and a honeycomb structure 135 interposed therebetween.

The honeycomb structure (135) is characterized in that a plurality of hollow hexagonal columnar unit cells are gathered to form a honeycomb structure. Since the side walls of the unit cells and the thin plates 131 and 132 are directed in different directions, the side surfaces of the unit cells can prevent the display panel 110 from being warped. The sandwich honeycomb panel 130 is lighter than a conventional rear panel made of a single panel, and a greater rigidity can be obtained even if a little use of the material is used.

The sandwich honeycomb panel 130 and the display panel 110 may be adhered to each other with an adhesive layer 115 interposed therebetween. The adhesive layer 115 may be coated with an adhesive, or a double-sided tape may be used. 1, the adhesive layer 115 is shown as being laminated on the entire rear surface of the display panel 110, but may be laminated only on a part of the display panel 110. [

A metal plate 140 on which the drive boards 147, 148, and 149 are seated is attached to the back surface of the sandwich honeycomb panel 130. The metal plate 140 may cover the entire rear surface of the sandwich honeycomb panel 130 but may be manufactured to have a size required for mounting the actual driving boards 147, 148, and 149, .

The metal plate 140 may be made of a metal material such as aluminum for the purpose of releasing heat generated from the driving boards 147, 148 and 149 for the rigidity of the display device 100. A rib for reinforcement can be formed in the middle to reduce warpage.

The drive boards 147, 148, and 149 mounted on the metal plate 140 can be largely divided into three types.

The power supply board 147 is a hardware that converts AC current from an external source into DC to enable stable use in the display device 100 and supplies power to each system. If the power supply board 147 fails to supply power to the system in a stable manner, the system may be brought down or not operated.

The power supply board 147 is divided into an electromagnetic interference filter section, an AC-DC rectification section, a DC-DC switching conversion section, and an output section.

The main board 148 is a device that controls the display panel 110 to implement a screen and collects the functions of the respective components. As the functions of the display device 100 are diversified recently, the main board 148 is mounted on the main board 148 The number of elements is increased and its function becomes important.

A timing controller (T-con) 149 is provided on a large screen of 10 inches or more and includes a semiconductor for adjusting the amount of data to be transmitted to the driving unit of the display panel 110 and improving image quality. The timing controller 149 receives the image information and transmits it to the driving unit of the display panel 110 for simultaneous output.

The initial display device 100 having the small size of the display panel 110 does not need the timing controller 149 but a time difference occurs during the process of spraying the colors on the screen as the size of the screen increases, A problem arises. To prevent this, the timing controller 149 is used to collectively adjust the time of the signal.

A large amount of heat is generated in the power supply board 147 and the main board 148 and the temperature of the 'A' region affected by both the power supply board 147 and the main board 148 is relatively high. That is, it is important that heat is generated in a portion where the power supply board 147 and the main board 148 are located, and heat is released from the corresponding portion.

The heat generated from the driving boards 147, 148, and 149 or the heat generated from the display panel 110 can not be emitted, and when the temperature of the display device 100 rises, the members thermally expand. There is no problem when the members are all pumped and contracted at the same rate, but each member expands and shrinks at different thermal expansion rates.

The metal plate 140 made of metal or the sandwich honeycomb panel 130 has a large coefficient of thermal expansion and the display panel 110 has a small thermal expansion coefficient. If there is a difference in the coefficient of thermal expansion between the members, as the temperature rises, the coefficient of thermal expansion is bent concave toward the member having a smaller coefficient of thermal expansion. It is necessary to prevent the bending deformation easily because the display device 100 is gradually becoming large in size.

The present invention is characterized by further comprising a heat flow path (136) for discharging heat without increasing the thickness of the display device (100). 2 is a rear view showing an embodiment of the honeycomb structure 135 of the display device 100 of the present invention.

As shown in FIG. 2, a part of the honeycomb structure 135 in which the hexagonal unit cells 135a are densely arranged is removed to form the heat transfer channel 136. It is preferable that the heat flow path 136 is formed at a portion where the heat of the driving boards 147, 148, 149 is generated as described above. The heat flow path 136 may be formed in a vertical direction in consideration of a property of the upwardly moving air, so that the heat is discharged to the upper part.

The upper part of the heat flow path 136a arranged in the vertical direction is connected to the upper part of the heat flow path 136a in the horizontal direction And a heat flow path 136b.

3 is a rear view according to one embodiment of the back sheet 132 of the display device 100 of the present invention. The rear thin plate 132 attached to the back surface of the honeycomb structure 135 may have a first heat dissipating hole 133 communicating with the heat path 136 so that air can be supplied to and discharged from the heat path 136 have.

3, the first heat dissipating hole 133 may be located at one end and the other end of the heat path 136. The first heat dissipating hole 133a may be formed at the lower end of the heat path 136a, And the first heat dissipating hole 133b located at the upper end serves as a discharge port.

4 is a cross-sectional view taken along the line A-A 'in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line B-B' in FIG. 4 &Quot;

The metal plate 140 attached to the back surface of the rear thin plate 132 is disposed at a position corresponding to the position of the first heat dissipating hole 133 or in a position corresponding to the position of the second heat dissipating hole 133 ). In the case of the second heat dissipating hole 141, the inlet 141a may further include a cap 142 for guiding air into the heat passage 136. The cap 142 may be opened downward and closed on the upper side.

The cap 142 may be separately formed and coupled to the inlet portion of the metal plate 140. However, as shown in FIG. 5, the inlet 141a of the metal plate 140 is cut and pressed in the backward direction, 142 may be integrally formed with the metal plate 140. [

At this time, the driving boards 147, 148 and 149 are positioned between the inlet and the outlet so that the air moving to the heating channel 136 can absorb the heat generated by the driving boards 147, 148 and 149. The 'A' region where the drive boards 147, 148, and 149 are not positioned between the inlet 141a and the outlet 141b may deform the shape of the metal plate 140 or add an additional heat dissipation structure.

That is, the auxiliary flow path 143 that assists the heat flow path 136 corresponding to the A region, so that the heat can be absorbed as the air flows through the two flow paths. 6, the auxiliary flow path 143 connects the inlet 141a and the outlet 141b of the heat flow path 136 located at 'A' and is connected to the inlet 141a and the outlet 141b, And the auxiliary passage 143 can be formed by pressing between the incisions.

When the auxiliary flow path 143 is integrally formed with the metal plate 140, the inlet 141a, the outlet 141b and the auxiliary flow path 143 located at 'A' can be formed at the same time.

7 is a rear view of an exemplary embodiment of the rear cover 150 of the display device 100 of the present invention. The rear cover 150 includes drive boards 147, 148, and 149 mounted on the metal plate 140, So as not to be exposed to the outside. If the rear cover 150 has a closed structure, the air passing through the heat flow path 136 continuously circulates in the inside, and the heat radiation effect is reduced. A vent hole 151 is formed so that air passing through the heat flow path 136 can be circulated.

A vent hole 151 positioned below the inlet 141a of the metal plate and a vent hole 151 located above the outlet 141b of the metal plate are formed and air introduced into the vent hole 151 The air having passed through the heat flow path 136 through the inlet ports 133a and 141a and rising in temperature can be discharged through the discharge ports 133b and 141b and into the upper vent hole 151. [

The vent hole 151 may include a filter to prevent foreign matter such as dust from entering the vent hole 151, and may further include a fan to assist air circulation.

8 is an exploded perspective view according to another embodiment of the display device 100 of the present invention. The driving boards 147, 148 and 149 are mounted on the metal plate 140 and the rear cover 150 is mounted on the driving boards 147, 148 and 149, And a skin cover 145 that is exposed to the backside of the display device 100. The display panel 100 includes a display panel 100,

The skin cover 145 is not covered by the rear cover 150 but is exposed to the outside and covers the back surface of the sandwich honeycomb panel 130 to improve the appearance. The skin cover 145 may be integrally formed as a part of the metal plate 140 so that the driving boards 147 and 148, which are transmitted to the metal plate 140, And 149 are transferred to the skin cover 145 to improve the heat dissipation performance of the display device 100.

The display device according to at least one embodiment of the present invention can efficiently discharge heat generated from the driving board and the display panel during driving, and can prevent the occurrence of warpage due to heat.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: display device 110: display panel
120: middle frame
130: Sandwich honeycomb panel 131: Front thin plate
132: rear thin plate 133: first heat dissipating hole
135: Honeycomb structure 136:
140: metal plate 141: second heat dissipating hole
142: cap 143: auxiliary channel
145: Skin cover 146: Board mounting part
150: rear cover 151: vent hole

Claims

A display panel;
A sandwich honeycomb panel comprising a front thin plate positioned on the display panel side, a rear thin plate positioned on a rear surface of the front thin plate, and a honeycomb structure interposed between the front thin plate and the rear thin plate, the honeycomb structure comprising a plurality of hexagonal unit cells; And
And a metal plate coupled to a back surface of the sandwich honeycomb panel and having a drive board mounted thereon,
Wherein the honeycomb structure includes a heat flow path formed by partially removing the honeycomb structure,
Wherein the rear thin plate has a first heat dissipating hole communicating with the flow path,
And the metal plate includes a second heat dissipating hole connected to the first heat dissipating hole.

The method according to claim 1,
Wherein the heat flow path is formed in a vertical direction.

The method according to claim 1,
The heat flow path
A plurality of first heat flow paths formed in the vertical direction
And a second heat flow path connected to an upper end of the first heat flow path and formed in a horizontal direction.

The method according to claim 1,
The first heat dissipating hole and the second heat dissipating hole
And an outlet connected to one end of the heat flow path and an outlet connected to the other end of the inlet.

5. The method of claim 4,
And a cap covering an inlet port of the second heat dissipating hole and having a lower end opened.

6. The method of claim 5,
The cap
Wherein the metal plate is cut and the upper portion of the cut-out is pressed toward the back surface so as to be integrated with the metal plate.

5. The method of claim 4,
The driving substrate
And the opening is seated between the inlet and the outlet.

5. The method of claim 4,
Wherein the inlet is located at the bottom and the outlet is located at the top.

The method according to claim 1,
And a second heat dissipating hole formed at a portion where the drive board is not seated
And an auxiliary flow path connecting the inlet and the outlet.

10. The method of claim 9,
The auxiliary flow path
The metal plate was cut in two places,
And the cut-away portion is formed integrally with the metal plate by pressing the cut-away portion in a backward direction.

10. The method of claim 9,
At a position adjacent to the auxiliary flow path,
Wherein at least one of a power supply coil, a main chip, and a timing controller is disposed.

The method according to claim 1,
Further comprising a rear cover coupled to a rear surface of the metal plate and having a vent hole corresponding to the second heat radiation hole.

13. The method of claim 12,
Wherein the vent hole further comprises a filter that passes air and blocks fine dust.

The method according to claim 1,
Further comprising a fan to assist air circulation through the heat flow path.

13. The method of claim 12,
The metal cover
A board mounting portion on which the drive board is seated and the rear cover is covered;
And a skin cover which is exposed to the back surface of the display device,
Wherein the board mounting portion and the skin cover are integrally formed.