KR20150066021A

KR20150066021A - Slim type display device having back cover

Info

Publication number: KR20150066021A
Application number: KR1020130151023A
Authority: KR
Inventors: 오진석; 정재규; 김홍산
Original assignee: 희성전자 주식회사
Priority date: 2013-12-05
Filing date: 2013-12-05
Publication date: 2015-06-16

Abstract

The present invention relates to a thin display device capable of remarkably reducing the thickness by a back cover of a composite material.
A thin display device of the present invention includes: a display panel for forming an image; A guide panel fixed to a rear surface of the display panel along a rear edge of the display panel; A surface light source unit disposed in an inner space formed by the display panel and the guide panel and supplying light to the display panel; A back cover fixed to the guide panel to cover the inner space, the back cover being made of a resin-containing composite material; And a control unit.
According to the thin display device of the present invention, the thickness can be remarkably reduced by using the back panel which is light and excellent in strength.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a thin display device having a back cover,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin display device, and more particularly, to a thin display device capable of remarkably reducing a thickness by a back cover made of an aluminum resin composite material.

2. Description of the Related Art Display devices are widely used in TVs, mobile phones, notebooks, tablets, and the like. They are widely used in plasma display panels (PDP), liquid crystal display (LCD) ; Organic Light-Emitting Display (OLED) devices, and electrophoretic display devices.

In recent years, the organic light emitting display device has attracted the spotlight due to its thinness. On the other hand, the liquid crystal display device is manufactured to be thinner than the OLED display device, despite the advantages of ease of production, It has not been adopted in large-sized televisions and the like because it is difficult.

Accordingly, attempts have been made to implement a thin shape by appropriately arranging components such as a light guide plate, a light source, and a liquid crystal panel, which are necessarily included in a liquid crystal display device.

For example, according to Korean Patent Laid-Open No. 10-2011-0020614, a backlight unit frame in which a guide panel is integrally formed along a rim is provided, and a reflection plate, a light guide plate, and an optical sheet are built in the backlight unit frame , And a light source is disposed on one side of the light guide plate. A liquid crystal panel and a top cover are coupled to an upper portion of the backlight unit structure, and a back cover is attached to a lower portion of the backlight unit frame.

However, the improvement of the structure of such a backlight unit limits the thinness of the liquid crystal display device. Particularly, in order to compete with a recently-launched thin organic light emitting display device, the need for thinning is further increased.

[Related Art Document] Korean Laid-open Patent No. 10-2011-0020614

A problem to be solved by the present invention is to provide a thin display device capable of remarkably reducing the thickness by applying a back cover made of an aluminum resin composite material.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a thin display device including: a display panel for forming an image; A guide panel fixed to a rear surface of the display panel along a rear edge of the display panel; A surface light source unit disposed in an inner space formed by the display panel and the guide panel and supplying light to the display panel; A back cover fixed to the guide panel to cover the inner space, the back cover being made of a resin-containing composite material; And a control unit.

According to another aspect of the present invention, the back cover is made of one of an aluminum resin composite materal panel, a honeycomb panel, a corrugate panel and an emboss panel Or more.

According to another aspect of the present invention, the surface light source portion includes a light guide plate, a light emitting diode (LED) disposed in a light entrance portion of the light guide plate, and an optical sheet disposed on a front surface or a back surface of the light guide plate.

According to another aspect of the present invention, at least one of the display panel and the back cover is curved.

According to the thin display device of the present invention, the thickness can be remarkably reduced by using the back panel which is light and excellent in strength.

1 is a schematic exploded perspective view of a thin display device according to an embodiment of the present invention.
2 is a schematic cross-sectional view of the thin display device of FIG.
Fig. 3 is a schematic perspective sectional view of the lower side of the thin display device of Fig. 1;
Fig. 4 is a schematic side cross-sectional view showing the structure of a panel that can be used as the back cover of Fig.
5A to 5C are photographs showing panels that can be used as the back cover of Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Like reference numerals refer to like elements throughout the specification.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.

Hereinafter, embodiments of the thin display device of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic exploded perspective view of a thin display device according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of the thin display device of FIG. 1, 4 is a schematic side cross-sectional view illustrating the structure of a panel that can be used as the back cover of Fig. 1, and Figs. 5A to 5C are photographs showing panels that can be used as the back cover of Fig. to be.

The configuration of the thin display device 100 according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG.

1 to 3, a thin display device 100 according to an exemplary embodiment of the present invention includes a display panel 110, a guide panel 120, a surface light source 130, And a back cover (140).

The display panel 110 is positioned to form the outermost layer of the display device 100, and may be, for example, a liquid crystal display panel. An image is displayed in the upward direction in FIGS. 1 and 2, and the display panel 110 includes not only a flat display panel as shown in FIGS. 1 to 3 but also a curved display panel.

The guide panel 120 is fixed to the rear surface of the display panel 110 along the rear edge of the display panel 110. The guide panel 120 may be directly attached to the display panel 110 using a double-sided tape or an adhesive, but may be fixed to the display panel 110 through a foam pad 121 as shown in FIG. .

The guide panel 120 has a function of guiding the surface light source unit 130 to be described later and may be made of plastic or metal.

The guide panel 120 may have various shapes to accommodate the surface light source unit 130. In the case of constructing a liquid crystal display device using an edge light type light source, as shown in FIG. 3, the LED heat sink 137 and the LED packages, which complement the heat dissipation and rigidity of the LED used as the light source, The LED array 138 which is a combined printed circuit board (PCB), the guide panel 120b to prevent light leakage from the light source and to mount the light source cover 139, which functions to dispose the light source on the light- Can be deformed. However, the guide panel 120a on the side where the light source is not disposed need not be formed as shown in Fig.

That is, the guide panel 120 may be integrally formed or separated into guide panels 120a and 120b of two units as shown in FIGS. Or the guide panel 120 may be formed by separating into three or more units for ease of assembly or the like.

The surface light source unit 130 is disposed in an inner space formed by the display panel 110 and the guide panel 120 to supply light to the display panel 110. The planar light source unit 130 includes a light guide plate 131 for converting the light emitted from the light source into an external planar light source and transmitting the planar light source, a light emitting diode (not shown) and a light guide plate 131 disposed in the light- And optical sheets 132 disposed on at least one of the front surface and the back surface of the optical sheets 132. [

Here, the optical sheets 132 collectively refer to sheets that impart an optical effect to the image formed on the display panel 110, change the optical path, or reflect light. Examples of the optical sheet 132 include a polarized film, a prism sheet, a diffusion sheet, a reflection sheet, and the like. These optical sheets 132 may be used in combination with various known products, and therefore, a detailed description thereof will be omitted. 1 and 2, two optical sheets 132 are disposed on the upper side of the light guide plate 131. However, the optical sheets 132 may be one or three or more, It is also acceptable to implement it.

The polarizing film, the prism sheet, the diffusion sheet, and the like are stacked in advance on the optical sheets 132, and are disposed between the light guide plate 131 and the display panel 110 as shown in FIGS. 1 and 2. In the case of the reflective sheet, (131). In this case, the reflective sheet may be fixed in a manner to be attached to the back cover 140 to be described later. Since the arrangement of the optical sheets 132 is well-known, detailed description is omitted.

Although the planar light source 130 includes only the light guide plate 131 and the optical sheet 132 in FIG. 1, the LED array 138 related to the light source is also included in the planar light source 130 .

The back cover 140 is fixed to the guide panel 120 so as to cover the inner space formed by the display panel 110 and the guide panel 120. The back cover 140 may be fixed to the guide panel 120 with a double-sided tape or an adhesive. The back cover 140 is not directly fixed to the guide panel 120 but indirectly connected to the guide panel 120 through the LED heat sink 137, the LED array 138, and the light source cover 139 as shown in FIG. ).

The back cover 140 is made of a resin-containing composite material. Composite material refers to a material in which two or more materials having different properties are macroscopically mixed to exhibit a more useful function or a material in which different materials having different structural characteristics are mechanically combined. The composite material is relatively lightweight and has excellent thermal conductivity. A high mechanical strength compared to the thickness can be expected.

Referring to FIG. 4, the back cover 140 may have a structure including a pair of surface layers 141 forming both surfaces and a core 142 interposed between the surface layers 141. Examples of the panel having such a structure include an aluminum resin composite materal panel, a honeycomb panel, a corrugate panel, and an emboss panel.

The surface layer 141 may be made of a metal material, and it is preferable to use an aluminum plate in consideration of moldability and thermal conductivity. The core 142 may be formed of a resin material that can compensate for the mechanical disadvantage of the surface layer 141.

For example, when the back cover 140 is made of an aluminum resin composite material panel, a resin material such as polyethylene (PE), polypropylene (PP) or the like may be used as the core 142, Or may be formed by mixing various materials. For example, the back cover 140 can be formed by mixing magnesium hydroxide, ethylene vinyl acetate (EVA), polyethylene, or the like.

In addition, the core 142 may have a structure partitioned to form a certain space therein. 5A is a photograph for explaining a honeycomb panel, FIG. 5B is a corrugated panel, and FIG. 5C is a photograph for explaining an emboss panel. The mechanical strength of the back cover 140 is increased by utilizing various structures as shown in FIGS. 5A to 5C . Here, the honeycomb structure, the corrugated structure, and the emboss structure can be manufactured by molding a resin.

On the other hand, the back cover 140 may be formed by molding with a material such as a CFRP panel (Carbon Fiber Reinforced Plastic panel) without having the structure as shown in FIG.

Since the back cover 140 of the composite material as described above has sufficient mechanical strength even when a thin thickness is applied, it is possible to use not only the cover for covering the back surface of the display device 100 but also the back cover 140 for supporting the surface light source part 130 have. Accordingly, it is possible to omit the structural components such as the backlight unit frame in the conventional liquid crystal display device, thereby minimizing the thickness of the display device 100 itself. For example, a display device 100 having the same structure as the present invention can realize a thickness of 10 mm or less, thereby realizing a liquid crystal display device having sufficient competitiveness for an organic light emitting display device.

Since the back cover 140 of the display device 100 of the present invention is thin but has a high mechanical strength, it is possible to directly mount a fixing stand capable of fixing the display device 100 to the wall on the back cover 140 In addition, other structures that may be attached to the TV may be installed.

Also, the display device 100 of the present embodiment can be applied to a curved display device. Particularly, since the back cover 140 has a good formability, it is liable to be bent in a curvature radius of, for example, 2000 to 8000 mm to be easily applied to a curved display device. The curvatures of the display panel 110 and the back cover 140 may be set different from each other and only the display panel 110 may be curved and the back cover 140 may be curved. Conversely, only the back cover 140 may have a curved shape and the display panel 110 may have a flat plate shape.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

110 ... Display panel 120 ... Guide panel
121 ... Foam pad 130 ... The surface light source unit
131 ... The light guide plate 132 ... Optical sheet
140 ... Back cover 141 ... Surface layer
142 ... core
100 ... A display device according to the present invention.

Claims

A display panel for forming an image;
A guide panel fixed to a rear surface of the display panel along a rear edge of the display panel;
A surface light source unit disposed in an inner space formed by the display panel and the guide panel and supplying light to the display panel; And
A back cover fixed to the guide panel to cover the inner space, the back cover being made of resin composite material; Wherein the thin display device comprises:

The method according to claim 1,
Characterized in that the back cover is composed of at least one of an aluminum resin composite materal panel, a honeycomb panel, a corrugate panel and an emboss panel. Thin display device.

The method according to claim 1,
Wherein the surface light source unit comprises a light guide plate, a light emitting diode (LED) disposed in a light entrance portion of the light guide plate, and an optical sheet disposed on a front surface or a back surface of the light guide plate.

4. The method according to any one of claims 1 to 3,
Wherein at least one of the display panel and the back cover is bent.