KR20160034456A - Display device - Google Patents

Abstract

The present invention relates to a display device which can be easily assembled. The display device includes a bottom case which has a bottom part and sidewalls located in the edge of the bottom part; a light guide plate accommodated in the bottom case; an optical sheet formed on the light guide plate; and a display panel formed on the optical sheet. At least one lateral part is combined with another lateral part through hinge.

Description

Display device {DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a display device that is easy to assemble.

A conventional display device includes a bottom case on which a light source and a light guide plate are placed.

The conventional bottom case does not have a fixing portion for fixing the light guide plate and the light guide plate must be accurately aligned at a proper position of the bottom case in the process of assembling the display device.

As described above, according to the conventional display device, the assembling process between the bottom case and the light guide plate is troublesome, and even after the alignment between the bottom case and the light guide plate is performed, there is a possibility that the light guide plate is separated from its alignment position due to an external impact or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device including a bottom case that is easy to assemble.

According to an aspect of the present invention, there is provided a display device including: a bottom case having a bottom and a plurality of side portions located at edges of the bottom; A light guide plate housed in the bottom case; An optical sheet provided on the light guide plate; And a display panel provided on the optical sheet; At least one side is hingedly coupled to the other side.

The display device further includes a light source portion provided on the inner surface of at least one of the plurality of side portions.

The plurality of sides each having a groove on an inner side; The light source portion is inserted into any one of the grooves; Each edge of the light guide plate is inserted into the groove of each side portion.

The light source portion is inserted into the groove of the side portion joined by the hinge method.

At least one of the plurality of sides has a groove in the inner side.

At least one side of the light guide plate is inserted into the groove.

At least one side further comprises a fixing protrusion, and the other side further comprises a coupling portion to which the fixing protrusion is coupled.

The coupling portion is a hole penetrating another side portion.

The engaging portion is a groove provided on the inner side surface of the other side portion.

At least one of the side portions has an extraction hole through which the signal transmission member connected to the light source portion can pass.

The display device according to the present invention has the following effects.

The first side of the bottom case according to the present invention has a hinge-type connection structure. Therefore, the assembly between the bottom case and the light guide plate is simplified. Further, since the light guide plate is fixed to the bottom case, the flow of the light guide plate can be prevented.

1 is an exploded perspective view of a display device according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line II 'in FIG.
3 is a detailed configuration diagram of the bottom case of FIG.
4 is a view for explaining the assembly between the first side portion and the light source portion in FIG.
5 is a view for explaining the assembly between the light source part and the first side part when a side-emitting type light source is used.
6 is a view for explaining assembly between the bottom case of FIG. 1 and the light guide plate.
FIG. 7 is a view showing another embodiment of the bottom case of FIG. 1. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with 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. Thus, in some embodiments, well known process steps, well known device structures, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. Like parts are designated with like reference numerals throughout the specification. It will be understood that when an element such as a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the element directly over another element, Conversely, when a part is "directly over" another part, it means that there is no other part in the middle. Also, when a portion of a layer, film, region, plate, or the like is referred to as being "below " another portion, it includes not only a case where it is" directly underneath "another portion but also another portion in between. Conversely, when a part is "directly underneath" another part, it means that there is no other part in the middle.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions. The elements can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

In this specification, when a part is connected to another part, it includes not only a direct connection but also a case where the part is electrically connected with another part in between. Further, when a part includes an element, it does not exclude other elements unless specifically stated to the contrary, it may include other elements.

The terms first, second, third, etc. in this specification may be used to describe various components, but such components are not limited by these terms. The terms are used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second or third component, and similarly, the second or third component may be alternately named.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

FIG. 1 is an exploded perspective view of a display device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I-I 'of FIG. 1, and FIG. 3 is a detailed view of the bottom case of FIG.

1, the display device of the present invention includes a bottom case BC, a reflective sheet RS, a light guide plate LGP, an optical sheet OS, a light source unit LU, a mold frame MF, Panel DP and a top case TC. Here, the backlight unit of the present invention includes a reflective sheet RS, a light guide plate LGP, an optical sheet OS, a light source unit LU, and a mold frame MF. On the other hand, the display panel DP and the backlight unit are assembled in a laminated state to constitute a display module. The display module may further include a top case TC and a bottom case BC for protecting and fixing the display panel DP and the backlight unit and a driving circuit board for driving the display panel DP .

The display panel DP displays an image. This display panel DP is largely divided into a display portion and a non-display portion. A video is displayed on the display unit, and signal lines for transmitting video data, various control signals, and various power supply signals necessary for displaying the video are provided on the non-display unit. In addition, some or all of the driving circuit portions providing the above video data, various control signals, and various power supply signals may be further provided on the non-display portion or the driving circuit board described above.

The display panel DP shown in the present invention may be a liquid crystal panel including a lower substrate, an upper substrate, and a liquid crystal layer disposed between the lower substrate and the upper substrate. The lower substrate includes a plurality of gate lines, a plurality of data lines intersecting the plurality of gate lines, pixel electrodes formed in each pixel region, a data signal driven by a gate signal from the gate line, And may include a thin film transistor. The upper substrate may include a plurality of color filter layers corresponding to the pixel regions.

Meanwhile, the display panel DP in the present invention is not limited to the liquid crystal panel, and a panel-type structure capable of displaying an image such as an organic light emitting display panel in addition to the liquid crystal panel can be any structure.

The bottom case BC includes a storage space therein, as shown in Fig. A reflective sheet RS, a light guide plate LGP, and a light source unit LU are disposed in this accommodating space. The bottom case BC has a bottom portion 111 having a rectangular shape and first to fourth side portions 111a and 111b located at each edge of the bottom portion 111. [ 111b, 111c, and 111d. The space defined by the side portions 111a to 111d and the bottom portion 111 becomes the storage space described above.

The first side portion 111a and the third side portion 111c have a shorter length than the second side portion 111b and the fourth side portion 111d.

The second to fourth side portions 111b, 111c and 111d have a shape protruding from the edge of the bottom portion 111 toward the top case TC at a predetermined height. The second to fourth side portions 111b, 111c, and 111d are fixed to the bottom portion 111. The second to fourth side portions 111b, 111c, and 111d may be integrally formed with the bottom case BC.

The first side portion 111a is hingedly coupled to the second side portion 111b. That is, the hinge coupling portion 445 provided at one end of the first side portion 111a is rotatably coupled to the coupling shaft 444 provided at one side of the second side portion 111b. Accordingly, the first side portion 111a can freely rotate about the connection shaft 444.

As shown in Figs. 1 and 3, the first side portion 111a has a fixing protrusion 323. The fixing protrusion 323 may be provided at the other end of the first side portion 111a. The fixing protrusion 323 and the first side portion 111a may be integrally formed. The fixing protrusion 323 may have a hook shape as shown in Fig.

The fixing protrusion 323 of the first side portion 111a is fitted to the third side portion 111c adjacent to the other end portion of the first side portion 111a. To this end, the third side portion 111c has a fitting portion 225 into which the fixing protrusion 323 is fitted. The engaging portion 225 may be provided at one end of the third side portion 111c. The engaging portion 225 may have a hole shape passing through a part of the third side portion 111c as shown in Fig. Although not shown, the engaging portion 225 may have a groove shape in which a portion of the inner side surface of the third side portion 111c is waved to a predetermined depth.

The first to fourth side portions 111a, 111b, 111c, and 111d have grooves. The grooves are provided on the inner surfaces of the side portions 111a, 111b, 111c, and 111d. Here, the inner side surfaces of the side portions 111a, 111b, 111c, and 111d are the surfaces between the side portions facing each other. For example, the first side 111a and the third side 111c are opposed to each other, and the opposing faces between the first side 111a and the third side 111c are formed on the inner side of the first side 111a and the inner side of the third side 111c ). The second side 111b and the fourth side 111d are opposed to each other so that the opposing surfaces between the first side 111b and the fourth side 111d face the inner side surface of the second side portion 111b and the inner side surface of the fourth side portion 111d My side.

For example, when the cross section of the second to fourth sides 111b, 111c, and 111d has the 'A' shape, each of the second to fourth sides 111b, 111c, and 111d has the above- And the first side portion 111a may have the groove 221 described above when the cross section of the first side portion 111a has a "C" shape.

A reflective material may be applied to the entire inner wall of the groove 221 of the first side portion 111a.

On the other hand, when the engaging portion 225 of the fourth side portion 111d described above is in the form of a groove (hereinafter, referred to as an engaging groove), the engaging groove 225 has a greater depth than the groove of the fourth side portion 111d .

The mold frame MF has a rectangular frame shape with the center portion thereof opened. The mold frame MF is positioned on the first to fourth sides 111a, 111b, 111c, and 111d of the bottom case BC. The mold frame MF supports the display panel DP and the top case TC and maintains a constant gap between the display panel DP and the optical sheet OS.

The mold frame MF includes a first support portion 601 and a second support portion 602. The first support portion 601 is placed on the first to fourth side portions 111a, 111b, 111c, and 111d. The second support portion 602 protrudes from the first support portion 601 toward the central portion of the mold frame MF. The second support portion 602 may protrude in a direction perpendicular to the first support portion 601.

The light source unit LU shown in FIGS. 1 and 2 is a component for generating light, and is housed in the bottom case BC so as to face the light incoming surface 122 of the light guide plate LGP. At this time, the light source unit (LU) may be located inside the groove 221 of the first side portion 111a. Here, the light source unit (LU) may be attached to the inner surface of the first side portion 111a through a separate adhesive member. The adhesive member may be, for example, a double-sided tape.

 On the other hand, in consideration of the size and luminance uniformity of the display panel DP, the light source unit (LU) may be composed of a plurality of light sources. That is, other light sources corresponding to the other sides 111b, 111c, and 111d of the light guide plate LGP may be further provided at the other edges of the mold frame MF.

The light source unit (LU) may include a printed circuit board (PCB) and at least one light source (LS), as shown in Figs.

One side of a printed circuit board (PCB) is divided into at least one mounting area and a wiring area (not shown). When there are two or more light sources LS, one light source is installed in each mounting region, and a plurality of signal transmission lines for transmitting driving power to the light sources are provided in the wiring region. The above-described driving power is generated at an external power supply (not shown), and then supplied to the plurality of signal transmission lines via a separate connector (not shown). The printed circuit board (PCB) may be made of a metal material so that the heat generated from the light source LS can be easily discharged to the outside.

Although not shown, an adhesive member may be provided between the other surface of the printed circuit board (PCB) and the inner surface of the first side portion 111a. And the printed circuit board PCB can be attached to the first side portion 111a by the adhesive member.

The light source LS is driven by a driving power source and emits light to the outside. The light source is mounted on a printed circuit board (PCB). The light source LS may be a light emitting package including at least one light emitting diode. For example, one light emitting package may include a red light emitting diode emitting red light, a green light emitting diode emitting green light, and a blue light emitting diode emitting blue light. The light emitting package generates white light by combining three kinds of hues. As another example, the light emitting package may include only the blue light emitting diode among the light emitting diodes of the three colors described above. In this case, the phosphor for converting the blue light into the white light may emit light of the blue light emitting diode . The light emitted from the light source LS is incident on the light guide plate LGP.

The light source LS may be a top emitting type light emitting device that emits light through an emitting portion 820 located on the opposite side of the mounting surface. That is, the light source shown in Fig. 2 emits light through the upper surface.

The light guide plate LGP guides the light provided from the light source LS to the display panel DP. At this time, the light guide plate LGP uniformly supplies the light received from the light source LS to the entire surface of the display portion of the display panel DP.

The light guide plate (LGP) may have a polyhedral shape. One surface of the plurality of planes LGP facing the light source is defined as a light incidence surface 122 and a surface of the plurality of surfaces facing the display panel DP is defined as a light exit surface 128 Is defined. Light emitted from the light sources LS is incident on the light incidence surface 122 of the light guide plate LGP. Then, the incident light proceeds inside the light guide plate LGP. The light guide plate LGP totally reflects the light that has entered into the LGP and externally transmits the light through the light output surface 128. Light emitted to the outside through the light exiting surface 128 passes through the optical sheet OS and is provided to the display portion side of the display panel DP.

As shown in Fig. 1, the light guide plate LGP has a groove 131. Fig. The groove 131 is provided at one side edge of the light guide plate LGP. And the fixing protrusion 323 of the first side portion 111a described above is located in the groove 131. [

Although not shown, a plurality of scattering patterns may be further provided on the lower outer surface of the light guide plate LGP to improve the reflectance of the light guide plate LGP. At this time, the scattering patterns can be arranged in such a manner that the scattering patterns are gradually spaced apart from the light-incoming surface 122 of the light guide plate LGP. Here, the lower outer surface of the light guide plate LGP refers to a surface of the light guide plate LGP that faces the bottom portion 111.

The light guide plate LGP may be made of a material having a light transmitting property such as acrylic resin such as PMMA (PolyMethylMethAcrylate) or polycarbonate (PC) to efficiently guide the light.

The reflective sheet RS is provided between the light guide plate LGP and the bottom portion 111. The reflective sheet RS passes through the lower outer surface of the light guide plate LGP and reflects out the light to the outside to return to the light guide plate LGP side, thereby minimizing the light loss rate. The reflective sheet RS may be made of, for example, polyethylene terephthalate (PET) and have reflectivity, and one surface thereof may be coated with a diffusion layer containing, for example, titanium dioxide. Further, the reflective sheet RS may be formed of a material including a metal such as silver (Ag).

Although not shown, the reflective sheet RS may further include additional reflectors disposed on the inner walls of the grooves 222, 223, and 224 provided in the second to fourth sides 111b, 111c, and 111d.

The optical sheet OS diffuses and condenses the light transmitted from the light guide plate LGP, which is located between the light guide plate LGP and the display panel DP. The optical sheet OS may include a diffusion sheet 201a, a light condensing sheet 201b and a protective sheet 201c. The diffusion sheet 201a, the light condensing sheet 201b and the protective sheet 201c are sequentially stacked on the light guide plate LGP in the listed order.

The diffusion sheet 201a disperses the light transmitted from the light guide plate LGP to prevent the light from being partially concentrated.

The condensing sheet 201b is positioned on the diffusion sheet 201a and functions to condense the light diffused from the diffusion sheet 201a in a direction perpendicular to the display panel DP. For this, triangular prisms may be arranged on a surface of the light collecting sheet 201b with a predetermined arrangement.

The protective sheet 201c is placed on the light collecting sheet 201b to protect the surface of the light collecting sheet 201b and to diffuse light to make the light distribution uniform. Light having passed through the protective sheet 201c is provided to the display panel DP.

The top case has an opening for exposing the display portion of the display panel DP, as shown in Figs. 1 and 2. That is, the top case has a rectangular frame shape with an open center. The top case TC covers the top and side surfaces of the first support portion 601 of the mold frame MF and a part of the first to fourth side portions 111a, 111b, 111c and 111d. The top case TC includes a first cover 501 covering an upper surface of the first support portion 601 and a side surface of the first support portion 601 and first to fourth side portions 111a, 111b, 111c, And a second lid 502 covering portions of the first lid 111d. On the other hand, the top case TC can be fixed to the bottom case BC using fastening means.

4 is a view for explaining the assembly between the first side portion 111a and the light source unit (LU) of FIG.

The printed circuit board (PCB) may include a signal transmitting member 482. The signal transmission member 482 includes a plurality of signal transmission lines. The signal transmission lines of the signal transmission member 482 are electrically connected to the signal transmission lines located in the wiring area of the printed circuit board (PCB).

The signal transmission member 482 is folded back on the printed circuit board (PCB). The signal transmission member 482 is exposed to the outside of the first side portion 111a through the extraction hole 366 of the first side portion 111a. The externally exposed signal transmitting member 482 is connected to a power supply. Although not shown, the signal transmission member 482 may further include a connector electrically connected to an output terminal of the power supply unit. This connector can be provided at one end of the signal transmission member 482.

The signal transmitting member 482 may be a flexible printed circuit or a flexible flat cable.

Meanwhile, the light source LS shown in FIG. 4 is a top emitting type light emitting device.

FIG. 5 is a view for explaining the assembly between the light source unit LU and the first side 111a when the side-emitting type light source LS is used.

The light source LS of the side emitting type includes an emitting portion 820, which is located at one of the side surfaces connecting the mounting surface and the upper surface. That is, the light source LS shown in Fig. 2 emits light through the side surface.

The light source unit LU including the light source LS of the side emitting type is located on the inner wall connected to the bottom of the inner walls constituting the groove 221 of the first side portion 111a.

On the other hand, the signal transmitting member 482 is exposed to the outside of the first side portion 111a through the drawing-out hole 366 of the first side portion 111a. The externally exposed signal transmitting member 482 is connected to a power supply. Although not shown, the signal transmission member 482 may further include a connector electrically connected to an output terminal of the power supply unit. This connector can be provided at one end of the signal transmission member 482.

6 is a view for explaining the assembly between the bottom case BC and the light guide plate LGP in FIG.

As shown in Fig. 6, the light guide plate LGP is housed in the bottom case BC in a slide manner. That is, when the first side portion 111a rotates counterclockwise around the connecting shaft 444, the holes 221, 222, 223 and 224 of the bottom case BC are exposed.

The light guide plate LGP is pushed into the bottom case BC while both edges are inserted into the groove 221 of the second side portion 111b and the groove 224 of the fourth side portion 111d. Then, the other edge of the light guide plate LGP is inserted into the groove 223 of the third side portion 111c.

Subsequently, the first side portion 111a rotates in a clockwise direction and is brought into close contact with the bottom portion 111, the second side portion 111b and the fourth side portion 111d of the bottom case BC. The fixing protrusion 323 of the first side portion 111a is fitted to the engaging portion 225 of the fourth side portion 111d so that the first side portion 111a is fixed. Further, another edge of the light guide plate LGP is inserted into the groove 221 of the first side portion 111a.

On the other hand, although not shown, the reflection sheet RS may also be housed in the bottom case BC in the same manner as the light guide plate LGP. At this time, the reflection sheet RS is stored in the bottom case BC before the light guide plate LGP.

Since the first side portion 111a of the bottom case BC has a hinged coupling structure, the assembly between the bottom case BC and the light guide plate LGP is simplified. Further, since the light guide plate LGP is fixed to the bottom case BC, the flow of the light guide plate LGP can be prevented.

FIG. 7 is a view showing another embodiment of the bottom case of FIG. 1. FIG.

7, a fourth side portion 111d having a relatively longer length among the side portions 111a, 111b, 111c, and 111d provided in the bottom case BC is attached to the first side portion 111a by a hinge It is also possible to combine them in such a manner.

At this time, the light source unit (LU) is inserted into the groove 224 of the fourth side portion 111d.

On the other hand, although not shown, it is also possible for the second side portion 111b to be hingedly coupled to the third side portion 111c or the first side portion 111a.

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 general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of.

111: bottom part 111a: first side
111b: second side portion 111c: second side portion
111d: third side portion 111d: fourth side portion
444: Connection axis 221-224: Home
225: coupling part LGP: light guide plate
323: Fixing projection

Claims (10)

A bottom case having a bottom and a plurality of sides located at an edge of the bottom;
A light guide plate housed in the bottom case;
An optical sheet provided on the light guide plate; And
A display panel provided on the optical sheet;
Wherein at least one side is coupled to the other side in a hinged manner. The method according to claim 1,
And a light source unit provided on an inner surface of at least one of the plurality of side portions. The method according to claim 1,
The plurality of sides each having a groove on an inner side;
The light source portion is inserted into any one of the grooves;
And each edge of the light guide plate is inserted into a groove of each side portion. The method of claim 3,
And the light source unit is inserted into the groove of the side portion coupled by the hinge method. The method according to claim 1,
Wherein at least one of the plurality of side portions has a groove on the inner side. 6. The method of claim 5,
Wherein at least one side of the light guide plate is inserted into the groove. The method according to claim 1,
Wherein the at least one side further comprises a fixing protrusion and the other side further comprises an engaging portion to which the fixing protrusion is engaged. 8. The method of claim 7,
And the engaging portion is a hole passing through the another side portion. 8. The method of claim 7,
And the engaging portion is a groove provided on an inner side surface of the another side portion. The method according to claim 1,
Wherein the at least one side portion has an extraction hole through which a signal transmission member connected to the light source portion can pass.

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