KR20170016117A - Display Device - Google Patents

Abstract

The present invention relates to a display device. The present invention comprises: a display panel; a light source unit which provides light to the display panel; a backlight unit which includes a light guide plate for diffusing light provided by the light source unit to the entire display panel, and a reflecting plate disposed under the light guide plate to reflect the light toward the display panel; a cover bottom which accommodates the backlight unit while having the light guide plate located on the bottom thereof; and a double-sided adhesive member which is located on the bottom of the cover bottom with the upper surface exposed through a space between the light guide plate and the cover bottom.

Description

[0001]

The present invention relates to a display device capable of implementing a Narrow Bezel.

2. Description of the Related Art [0002] As an information-oriented society develops, there have been various demands for display devices for displaying images. Recently, liquid crystal displays (LCDs), plasma display panels (PDPs) Various display devices such as an OLED (Organic Light Emitting Diode Display Device) have been utilized.

Such display devices include backlight units and display panels, and various supporting structures or structures used to fasten them.

A variety of burrs or the like may be generated in a process of assembling the display device for fastening the backlight unit and the display panel to each other by the supporting structure, resulting in a screen failure.

 In view of the foregoing, it is an object of the present invention to provide a display device that prevents burrs or foreign objects generated during the assembling process of a display device from causing screen defects.

Another object of the present invention is to provide a display device for reducing light leakage in a display device of a narrow bezel.

According to an aspect of the present invention, there is provided a display panel including a display panel, a light source unit for providing light to the display panel, a light guide plate for diffusing light provided by the light source unit to the entire display panel region, A backlight unit including a reflection plate that reflects in the panel direction, a cover bottom which is located on the bottom surface of the light guide plate and accommodates the backlight unit, and a double-sided adhesive member which is positioned on the bottom surface of the cover bottom, And a display device.

According to the embodiment, it is possible to prevent burrs and foreign matter generated during the assembling process of the display device from causing screen defects.

According to the embodiment described above, light leakage can be reduced in a display device of a narrow bezel.

1A is a perspective view of a notebook computer to which embodiments may be applied. 1B is a schematic view of a display device used in the notebook computer of FIG.
Fig. 2 is a cross-sectional view of the display device side taken along the line A-A 'in Fig. 1, according to an embodiment.
3 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to the embodiment.
4 is a plan view showing only some components in a display device according to an embodiment.
5 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to the comparative example.
6 is a plan view showing only a few components in a display device according to a comparative example.
Fig. 7 is a cross-sectional view of the display device shown in Fig. 3, in which the double-sided adhesive member adsorbs burnt impurities and the like to minimize screen defects.
8 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to another embodiment.
9 is a plan view showing only some components in a display device according to another embodiment.
10 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to still another embodiment.
11 is a plan view showing only some components in a display device according to another embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

1A is a perspective view of a notebook computer to which embodiments may be applied. 1B is a schematic view of a display device used in the notebook computer of FIG.

As shown in FIG. 1A, an electronic device such as a notebook computer may include a display device unit 100, a main device unit 110 'on which a main circuit board and input / output means are mounted, and the like.

The display unit 100 includes a display area 120 in which an image is displayed and a bezel area 130 that is an area in which an image is not displayed while forming an outline around the display area. do.

In addition, the light source unit 110 is disposed on one side of the display device 100, generally, on the side of the main device side.

The bezel area 130 of the display device constituting the display device 100 is formed by a space occupied by the outer structure of the display device in addition to the non-display area of the display panel itself such as a liquid crystal panel included in the display device.

Particularly, as shown in FIG. 1B, the bezel B1 in which the light source unit 110 is disposed is not only connected to the main device unit 110 ', but also a display device driving circuit and the like are mounted.

FIG. 2 is a cross-sectional view (A-A 'line in FIG. 1) of the display device according to an embodiment, and FIG. 3 is a cross- B 'line section). 4 is a plan view showing only some components in a display device according to an embodiment.

 2, the display device according to one embodiment includes a display panel 240 such as a liquid crystal display panel and a backlight unit 220 disposed below the display panel 240 to irradiate light to the display panel, (Cover Bottom 210 or Plate Bottom) of a metal or plastic material that supports the display device 220 and extends over the entire rear surface of the display device.

Further, a guide panel 230 may be further provided, which is fixed to the cover bottom 210 to connect the backlight unit 220 to the display panel 140.

The display device further includes a case top 250 which covers the side surface of the cover bottom 210 disposed at the outermost portion and extends to a part of the front surface of the display panel 240 to protect the front edge of the display panel 240, May be further included.

The case bottom 250 may cover the side surface of the cover bottom 210 to extend to a front part of the front side of the display panel 240 to protect the display panel and may be disposed behind the cover bottom 210. [ On-film (COF) circuit portion, which is a connection circuit for connecting a printed circuit board (not shown) for driving the display panel 240 with the display panel 240.

In some cases, as shown in FIG. 2, the case top 250 may cover the entire rear surface as well as the side of the display device. In this case, a term different from the case top 250 may be used. The case top 250 includes all the members having the functions described above, and is not limited to that term, and may be expressed by other terms such as a back cover, a front cover, a cover shield, and the like.

In the case of a liquid crystal display panel, the display panel 240 includes a plurality of gate lines, a data line and a pixel defined in the intersecting region, and a thin film transistor as a switching element for adjusting the light transmittance in each pixel An upper substrate provided with a color filter and / or a black matrix, and a liquid crystal material layer formed therebetween. Polarizing plates 242 and 244 may be disposed on both ends of the display panel 240, respectively.

Meanwhile, the display panel 240 to which the present invention can be applied is not limited to such a liquid crystal display panel. In addition to a display device such as a plasma display, the display panel 240 may include any type of display device that receives light from a backlight unit, Of the display panel.

2, the backlight unit 220 includes a light source unit 100 including a light source 228 such as an LED and an LED flexible circuit 227 as a circuit for controlling On / Off of a light source, A light guide plate 222 or a diffusion plate for diffusing light to the entire area of the display panel 240, a reflection plate 224 for reflecting light in the direction of the display panel 240, Such as one or more optical sheets 226 disposed for application to brightness enhancement, light diffusion and protection, and the like.

The light source 228 may be a light emitting diode (LED) or a light emitting diode strip. However, the present invention is not limited thereto. Any type of light source may be used as long as it can provide necessary light to the display panel.

The light guide plate (LGP) 224 may be formed of a rectangular clear plastic sheet which is generally die-cut, extruded or injection-molded from a plastic sheet, and light from a light source such as a light emitting diode array, And is diffused across the back surface of the display panel while being totally reflected inside the light guide plate. Light emitted through the flat upper surface of the light guide plate functions as a backlight of the display panel.

Examples of the material of the light guide plate 222 include polymethyl methacrylate (PMMA), MS (methystyrene) resin, polystyrene (PS), polypropylene (PP), polyethylene terephthalate : PET) and polycarbonate (PC), but the present invention is not limited thereto.

In particular, the bottom surface of a part of the edge of the light guide plate 222 can be adhesively fixed to the inner surface of the cover bottom 210 by the double-sided adhesive member 160.

The reflection plate 224 is disposed on the back surface of the light guide plate 222 and functions to improve the brightness of the light by reflecting light passing through the back surface of the light guide plate 222 toward the display panel 240.

The optical sheet 226 on the light guide plate 222 may include a diffusion sheet and at least one light collecting sheet or the like to diffuse or condense the light passing through the light guide plate so that a more uniform surface light source is incident on the display panel .

The optical sheet 226 according to the present embodiment is composed of two or more individual sheets. Examples of the individual sheets include a light collecting sheet or a prism sheet (PS) having a condensing function, a diffusion sheet A diffusing sheet (DS), and a reflective polarizing film for improving brightness called a dual brightness enhancement film (DBEF), but the present invention is not limited thereto.

That is, the optical sheet 226 according to the present embodiment may be formed of a combination of two or more of a light collecting sheet or a prism sheet, a diffusing sheet, and a reflective polarizing film. For example, A Diffuser Down Sheet, a Prism Down Sheet, and a Prism Up Sheet.

A light collecting sheet or a prism sheet PS among the individual functional sheets constituting the optical sheet 226 includes a light collecting pattern or the like on a sheet in the form of a transparent film so as to collect incident light in a certain direction Condenser function.

On the other hand, a diffusing sheet (DS) for diffusing light is an optical sheet having a function of diffusing incident light in various directions, and may be constituted by including a diffusion pattern or a diffusion particle in a transparent sheet have.

In addition, the reflection type polarizing film is an optical film that transmits only light that vibrates in one direction among natural incident lights while vibrating in various directions, and reflects light that vibrates in the other direction, and has a luminance enhancement called DBEF (dual brightness enhancement film Film.

The cover bottom 210 constitutes the rear and side outer surfaces and supports of the display device according to the present embodiment, and is a metal or plastic frame structure that is bent in an L-shape as a whole.

The lower surface of the reflection plate 224 and the light guide plate 222 of the backlight unit 220 are seated on the inner surface of the cover bottom 210 and the double- (260) may be disposed to fix the backlight unit (220) to the cover bottom (210). The double-sided adhesive member 260 is positioned on the bottom surface of the cover bottom as described later, and the top surface is exposed in the space between the light guide plate 222 and the cover bottom 210. [

In the present specification, the cover bottom 210 is not limited to the term but may be a cover bottom, a base frame, a metal frame, a metal chassis, a chassis base Chassis base, m-chassis, etc., and it should be understood as a concept including all frame or plate-like structures disposed at the base of the display device as a support for fixing at least one of the display panel and the backlight unit something to do.

The cover bottom 210 may be formed of a metal press structure, but not limited thereto, and may be formed by injection molding of a reinforced plastic material or the like.

The guide panel 230 is fixed to the inner surface of the cover bottom 210 and covers three surfaces of the backlight unit 220 on the light incidence side except the one surface on the light incident side where the light source unit 110 is disposed, And a plastic structure for attaching the display panel 240. 1, the guide panel 230 does not have to be fixed to the cover bottom 210 at the vertical side of the light incoming portion, and therefore the narrow bezel B1 at the vertical side can be realized .

Further, the guide panel 230 may not be used to implement the inner bezel B2 on the side of the light-incoming part but on the side of the non-light-incoming part. Therefore, the display device according to one embodiment will be described as including the guide panel 230, but it is not limited thereto and may not include the guide panel 230. However, the display device may not include the guide panel 230 but may include various supporting structures.

The guide panel 230 has a guide panel 230 which is fixed to the inner surface of the cover bottom 210 by a part of the double-sided adhesive member 260 and a horizontal support part which extends in the horizontal direction. ) From below.

Since the guide panel 230 is disposed inside the cover bottom 210 and is adhered to the inner surface of the cover bottom 210 by the double-sided adhesive member 260, The size of the bottom should be maintained to some extent.

At this time, the double-sided adhesive member 260 performs a function of bonding the bottom surface of the guide panel 230 to the inner surface of the cover bottom 210. The double-sided adhesive member 260 is a member for joining the guide panel 230 and the cover bottom 210, and may be embodied in various forms such as a double-sided adhesive tape or a double-sided adhesive sheet.

The double-sided adhesive member 260 also covers the bottom surface of the C-shaped guide panel 230 on three sides on which the guide panel 230 is disposed, because the cover panel 230 covers the three sides of the backlight unit 220 on which the guide panel 230 is disposed. And adheres to the inner surface of the bottom 210. The guide panel 230 is not disposed on the light incoming side of the light guide plate 222 and the double-sided adhesive member 260 is not disposed between the guide panel 230 and the cover bottom 210 as shown in FIG.

The cross sections of the reflection plate 224 and the light guide plate 222 substantially coincide with each other on the light incoming side of the light guide plate 222 on which the guide panel 230 and the double-sided adhesive member 260 are not disposed, The end face of the light guide plate 222 does not coincide with the end face of the reflection plate 224 and the light guide plate 222 on the light incidence side of the light guide plate 222 on which the guide panel 230 and the double-sided adhesive member 260 are disposed, And protrudes in the direction of the guide panel 230 as compared with the reflection plate 224. That is, there is a space between the bottom surface of the light guide plate 222 and the bottom surface of the cover bottom 210 at a position where the light guide plate 222 protrudes in the direction of the guide panel 230 as compared with the reflection plate 224.

A part of the double-sided adhesive member 260 is adhered to the guide panel 230 and the cover bottom 210 and a part of the double-sided adhesive member 260 extends a space between the light guide plate 222 and the cover bottom 210. One end of the double-sided adhesive member 260 may be in contact with the reflection plate 224 without being limited to the reflection plate 224, but the present invention is not limited thereto. The double-sided adhesive member 260 may partially overlap the light guide plate 222 in the vertical direction. As described above, a part of the double-sided adhesive member 260 extends a space between the light guide plate 222 and the cover bottom 210. However, when one end of the double-sided adhesive member 260 is part of the double- It may be positioned between the guide panel 230 and the light guide plate 222 or may be located at one end of the light guide plate 222.

The thickness t1 of the double-sided adhesive member 260 may be thinner than the thickness t2 of the reflection plate 224. [ Therefore, the upper surface of the double-sided adhesive member 260 is not in contact with the lower surface of the light guide plate 222 but is located away from the lower surface of the light guide plate 222. Therefore, a space may exist between the lower surface of the light guide plate 222 and the upper surface of the double-sided adhesive member 260 from the space between the light guide plate 222 and the guide panel 230.

5 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to the comparative example. 6 is a plan view showing only a few components in a display device according to a comparative example.

5 and 6 is characterized in that the double-sided adhesive member 260a is located only between the guide panel 230 and the cover bottom 210 and the end face of the reflection plate 224a is located on the side of the light guide plate 222 The display device may be the same as the display device according to the embodiment described with reference to Figs. 2 to 4 except for the point substantially corresponding to the cross section.

As shown in FIG. 5, it is impossible to remove 100% of edge burrs and foreign matter generated after the cutting process of the light guide plate 222. Since the light guide plate 222 is seated after the reflection plate 224a is assembled when the display device is assembled, burrs and foreign matter generated after the processing of the light guide plate 222 are detached Foreign matter or the like may be transferred to the display area between the light guide plate 222 and the reflection plate 224a, resulting in a screen failure.

Fig. 7 is a cross-sectional view of the display device shown in Fig. 3, in which the double-sided adhesive member adsorbs burnt impurities and the like to minimize screen defects.

7, the lower surface of the light guide plate 222 and the lower surface of the double-sided adhesive member 260 (see FIG. 7) from the space between the light guide plate 222 and the guide panel 230 in the display device according to the above- The burrs and foreign matter generated at the edge of the light guide plate can be adsorbed to the double-sided adhesive member 260. [ Therefore, it is possible to prevent burrs or foreign matter generated at the edge of the light guide plate 222, which moves to the screen during transportation of the display device, from causing defective display.

The double-sided adhesive member 260 may have various colors. For example, the double-sided adhesive member 260 may be black or gray. When the color of the double-sided adhesive member 260 is black, light shining out from the light source 227 to the outside can be minimized . In other words, since the black both-side adhesive member 260 is applied, light leakage on the side of the non-light-incident portion can be reduced, for example, in a display device of a narrow bezel.

8 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to another embodiment. 9 is a plan view showing only some components in a display device according to another embodiment.

In the embodiment described above, the display panel 240 is disposed on the upper surface of the cover bottom 210, and further includes a guide panel 230 having a U-shape on three sides of the non- Is fixed to the inner surface of the cover bottom 210 by a part of the double-sided adhesive member 260.

8 and 9, the double-sided adhesive member 260 includes a first double-sided adhesive member 260a for fixing the bottom surface of the guide panel 230 and the inner surface of the cover bottom 210, And a second double-sided adhesive member 260b positioned in the space between the bottom surface of the cover bottom 210 and the bottom surface of the cover bottom 210. [ The first double-sided adhesive member 260a is an adhesive member for fixing the bottom surface of the guide panel 230 and the inner surface of the cover bottom 210. [ Therefore, the width of the first double-sided adhesive member 260a may be the same as the width of the lower surface of the guide panel 230. [ The second double-sided adhesive member 260b is an adhesive member that acts to adsorb burnt or foreign matter generated at the edge of the light guide plate 222. [

Although the first double-sided adhesive member 260a and the second double-sided adhesive member 260b are illustrated as being separated from each other in FIGS. 8 and 9, the first double-sided adhesive member 260a and the second double- It may be attached.

10 is a cross-sectional view (a cross-sectional view taken along the line B-B 'in Fig. 1) on the non-light-incident portion side of the display device according to still another embodiment. 11 is a plan view showing only some components in a display device according to another embodiment.

As shown in Figs. 10 and 11, the double-sided adhesive member 260 can be positioned on three surfaces of the non-light-incident portion and four surfaces including one surface of the light-incoming portion. In other words, as shown in Fig. 11, the double-sided adhesive member 260 includes a double-sided adhesive member 260c on the light-incoming portion side. At this time, the width W2 of one surface on the light-incoming portion side in the double-sided adhesive member 260 may be narrower than the width W1 of three surfaces on the non-light- The guide panel 230 is not fixed to the cover bottom 210 at the vertical side on the light incoming portion side so that the width W2 of the one surface of the light incoming portion side corresponding to the implementation of the narrowed bezel B1 on the vertical side is Can be narrower than the width W1 of the three surfaces on the non-light-incident portion side.

The term "display device" is used herein to refer to a display device such as a liquid crystal module (LCM) including a display panel and a driver for driving the display panel, as well as a notebook computer , A set of electronic devices or set devices such as a television, a computer monitor, a mobile electronic device such as a smart phone or an electronic pad, and the like.

 That is, the display device in this specification is used to mean not only a conferring display device such as LCM but also a set device which is an application including the display device.

In addition, the display panel to which the present invention can be applied is not limited to such a liquid crystal display panel, and may be a display device such as a plasma display or the like. In addition to a display device such as a plasma display, . ≪ / RTI >

According to the above-described embodiment, a burr or foreign matter generated at the edge of the light guide plate 22 is attracted to the double-sided adhesive member 260, so that the burrs or foreign matter generated at the edge of the light guide plate, it is possible to prevent a burr or a foreign object from causing a screen failure.

According to the above-described embodiment, since the black double-sided adhesive member 260 is applied, for example, light leakage on the side of the non-light emitting portion can be reduced in a display device of a narrow bezel.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

210: cover bottom 222: light guide plate
226: optical sheet 230: guide panel
250: Case Top
260, 260a to 260c: a first double-sided adhesive member

Claims (8)

Display panel;
A backlight unit including a light guide unit for diffusing light provided by the light source unit to the entire display panel area, and a reflector disposed under the light guide plate and reflecting the light toward the display panel;
A cover bottom positioned on the bottom surface of the light guide plate and accommodating the backlight unit; And
And a double-sided adhesive member located on a bottom surface of the cover bottom and having an upper surface exposed in a space between the light guide plate and the cover bottom. The method according to claim 1,
The light guiding plate is protruded from the reflector at the non-light emitting portion side, and a space exists between the bottom surface of the light guiding plate and the bottom surface of the cover bottom,
Wherein one end of the double-sided adhesive member is present in a space between a bottom surface of the light guide plate and a bottom surface of the cover bottom. 3. The method of claim 2,
Wherein the thickness of the double-sided adhesive member is thinner than the thickness of the reflection plate, so that the double-sided adhesive member is not in contact with the light guide plate. 3. The method of claim 2,
And the end face of the light guide plate coincides with the end face of the reflection plate on the light incoming portion side. The method according to claim 1,
And a guide panel disposed in the cover bottom and supporting the display panel on the upper surface and having a U-shaped guide panel on three sides of the non-
Wherein the bottom surface of the guide panel is fixed to the inner surface of the cover bottom by a part of the double-side adhesive member. 6. The method of claim 5,
The double-
A first double-sided adhesive member for fixing the bottom surface of the guide panel and the inner surface of the cover bottom,
And a second double-sided adhesive member positioned in a space between a bottom surface of the light guide plate and a bottom surface of the cover bottom. 6. The method of claim 5,
Wherein the cover bottom is located on four surfaces including three surfaces on the side of the non-light-entering portion and one surface on the light-incoming portion side,
Wherein a width of one surface of the non-light-entering portion is narrower than a width of three surfaces of the non-light-entering portion. The method according to claim 1,
Wherein the color of the double-sided adhesive member is black.

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