KR102400219B1 - Display device - Google Patents

Abstract

The present invention provides a display device including a light guide plate having a plurality of guide grooves positioned thereon and a cover bottom having a plurality of mounting grooves positioned to correspond to the guide grooves. In such a display device, a light guide plate guide is positioned between the light guide plate and the cover bottom. In this light guide plate guide, the bracket supporting the side surface of the light guide plate and the rigidity are higher than that of the bracket, the body is fixed to the bracket, the first projection is inserted into the guide groove of the light guide plate, and the second projection is inserted into the mounting groove of the cover bottom. It may include a guide pin.

Description

display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly, to a display device including a guide for supporting a light guide plate.

As the information society develops, the demand for a display device for displaying an image is increasing in various forms, and in recent years, a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode Various display devices such as an organic light emitting diode display device (OLED) are being used.

Among these display devices, a liquid crystal display (LCD) includes an array substrate including a thin film transistor as a switching element for on/off control of each pixel region, a color filter and/or a black matrix, and the like. It consists of an upper substrate, a display panel including a liquid crystal material layer formed therebetween, a driving unit for controlling the thin film transistor, and a backlight unit (BLU) that provides light to the display panel. , a device that displays an image by adjusting the arrangement of the liquid crystal layers according to the electric field applied between the pixel (PXL) electrode and the common voltage (Vcom) electrode provided in the pixel area and thus the transmittance of light accordingly.

In the case of such a liquid crystal display device, a backlight device that provides light from the outside must be provided, and this backlight unit may include a light source, a light guide plate, a reflector plate, and sub-units such as an upper sheet, and supports the side and rear surfaces of the display device. It may include one or more frames or chassis as a support structure for

Among the components constituting the backlight unit, the light guide plate is a plate-shaped member used to uniformly guide the light from the light source to the entire display device. Wrinkles or cracks may occur.

On the other hand, when a portrait type display device is used, a rotational force may be generated in the light guide plate as the length in the vertical direction becomes longer than in the horizontal direction. As the distance between the poles increases or decreases non-uniformly, a problem in which a bright line is detected or a light splash is detected in the display device may occur.

Against this background, in one aspect, it is an object of the present invention to provide a technology that enables contraction and expansion of the light guide plate while preventing breakage due to flow by fixing the light guide plate.

In another aspect, it is an object of the present invention to provide a technology for supporting a rotational force generated in a light guide plate.

In order to achieve the above object, in one aspect, the present invention provides a display device including a light guide plate in which a plurality of guide grooves are positioned and a cover bottom in which the plurality of mounting grooves are positioned to correspond to the guide grooves. In such a display device, a light guide plate guide may be positioned between the light guide plate and the cover bottom. The light guide plate guide has a bracket supporting the side surface of the light guide plate and has higher rigidity than the bracket, the body is fixed to the bracket, and the first protrusion is in the guide groove of the light guide plate. Inserted and the second protrusion may include a guide pin that is inserted into the mounting groove of the cover bottom.

According to this solution provided by the present invention, there is an effect that the light guide plate can be contracted and expanded while preventing breakage due to flow by fixing the light guide plate. In addition, according to this solution provided by the present invention, the light guide plate can be contracted and expanded while the rotational force generated in the light guide plate is properly supported.

1 is a cross-sectional view of a display device according to an exemplary embodiment.
FIG. 2 is a plan view illustrating an arrangement of a light guide plate, a light guide plate guide, and a cover bottom in the display device of FIG. 1 .
3A to 3C are diagrams for explaining a principle in which the light guide plate guide supports the light guide plate according to an exemplary embodiment.
4 is a perspective view of a light guide plate guide according to an exemplary embodiment.
5 is a top view of a bracket according to an embodiment.
6 is a rear view of a bracket according to an embodiment.
7 is a side view of a light guide plate guide according to an exemplary embodiment.
8 is a cross-sectional view of a light guide plate guide according to an exemplary embodiment.
9 is a perspective view of a light guide plate and a light guide plate guide inserted into a cover bottom according to an exemplary embodiment.
10 is a view of the mounting groove and the light guide plate guide of the cover bottom as viewed from the rear direction of the cover bottom according to an exemplary embodiment.
11 is a view for explaining an expansion gap of a light guide plate according to an exemplary embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of a related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is formed between each component. It should be understood that elements may also be “connected,” “coupled,” or “connected.” In the same vein, when it is described that a component is formed "on" or "below" another component, the component is both formed directly on the other component or indirectly through another component. should be understood as including

1 is a cross-sectional view of a display device according to an exemplary embodiment.

Referring to FIG. 1 , the display device 100 includes a display panel 140 such as a liquid crystal display panel and a backlight unit 120 disposed under the display panel 140 to irradiate light to the display panel 140 , and the backlight unit ( A cover bottom 110 made of a metal or plastic material that supports the 120 and extends over the entire rear surface of the display device 100 may be included.

In addition, the display device 100 may be additionally provided with a guide panel 130 made of a plastic material that is fixed to the cover bottom 110 to connect the backlight unit 120 and the display panel 140 . , a double-sided tape is attached to a portion of the upper surface of the guide panel 130 and the display panel 140 is disposed thereon, so that the display panel 140 may be fixedly mounted.

In addition, the display device 100 covers the side portions of the cover bottom 110 and the guide panel 130 disposed at the outermost portion and extends to a portion of the front surface of the display panel 140 to protect the front edge of the display panel 140 . A case top (Case Top; 150) may be additionally included.

The case top 150 surrounds the side surface of the display device and extends to a partial region of the front portion of the display panel 140 to protect the display panel and print for driving the display device disposed behind the cover bottom 110 . It performs a function of protecting a chip-on-film (COF) circuit, which is a connection circuit for connecting the system board, which is a circuit board (PCB), to the display panel 140 .

When the display panel 140 is a liquid crystal display panel, it again includes a plurality of gate lines and data lines, pixels defined in an intersection region thereof, and a thin film transistor as a switching device for controlling light transmittance in each pixel. It may be configured to include an array substrate, an upper substrate including a color filter and/or a black matrix, and a liquid crystal material layer formed therebetween.

In addition, the display device 100 includes a backlight unit 120 for providing light to the display panel 140 , and the backlight unit 120 is an edge-type according to an arrangement of a light source and a transmission type of light. Alternatively, it may be classified into a direct-type or the like.

The backlight unit 120 shown in FIG. 1 is an edge-type backlight unit, and includes a light source 128 such as an LED (Light Emitting Diode) and a light source module 127 including a holder and a light source driving circuit for fixing the light source; , a light guide plate 124 for diffusing light to the entire area of the display panel 140 , a reflection plate 122 for reflecting light toward the display panel 140 , and the light guide plate 124 disposed above the It may include sub-units such as one or more optical sheets 126 disposed for purposes such as brightness enhancement, light diffusion and protection.

The light guide plate 124 may be supported by the light guide plate guide 160 .

The light guide plate 124 may flow in all directions on a plane, and the light guide plate guide 160 supports the light guide plate 124 to prevent the light guide plate 124 from flowing and to prevent the light guide plate 124 from breaking.

Meanwhile, since the light guide plate 124 is adjacent to the light source 128 that emits heat, contraction or expansion due to heat may occur frequently.

In this case, the structure preventing the flow of the light guide plate 124 may function as an obstacle to the contraction and expansion of the light guide plate 124 . It includes a structure that prevents contraction and expansion of the light guide plate 124 while preventing it.

Specifically, the display device 100 supports the light guide plate 124 through the light guide plate guide 160 , which prevents the light guide plate 124 from flowing while preventing contraction and expansion of the light guide plate 124 . It is structured not to.

The light guide plate guide 160 includes a bracket 162 and a guide pin 164 made of different materials. The guide pin 164 mainly functions to prevent the flow of the light guide plate 124, and the bracket 162 ) mainly functions to support the contraction and expansion of the light guide plate 124 . At this time, due to the material characteristics of the bracket 162 and the guide pin 164 and the structure and coupling characteristics of the bracket 162 and the guide pin 164 , the light guide plate guide 160 prevents the light guide plate 124 from flowing while The contraction and expansion of the light guide plate 124 can be efficiently supported.

From a functional point of view, the guide pin 164 mainly prevents the flow of the light guide plate 124 , and the bracket 162 supports contraction/expansion of the light guide plate 124 . However, the light guide plate guide 160 exerts such a function or effect by the mutual organic combination of the guide pin 164 and the bracket 162 , and it should not be understood that a specific configuration performs only a specific function. The above description is only for helping conceptual understanding of the effect of an embodiment.

When looking at the material characteristics, the guide pin 164 is made of a rigid material, so that it can firmly support the light guide plate 124 . The characteristic of the rigid material is effective in preventing the light guide plate 124 from flowing. On the other hand, since the bracket 162 is made of an elastic material, it is possible to efficiently support the contraction and expansion of the light guide plate 124 . The bracket 162 expands when the light guide plate 124 is contracted due to the nature of the elastic material and contracts when the light guide plate 124 expands, thereby providing a constant support force to the light guide plate 124 without interfering with the contraction and expansion of the light guide plate 124. can

Here, the rigidity and elasticity of the guide pin 164 and the bracket 162 may be defined as relative values. For example, the rigidity value of the guide pin 164 may be greater than the rigidity value of the bracket 162 . In this aspect, it can be said that the guide pin 164 is made of a rigid material. As another example, the elasticity value of the bracket 162 may be greater than the elasticity value of the guide pin 164 . In this aspect, it can be said that the bracket 162 is made of an elastic material.

On the other hand, in terms of structure and coupling, the guide pin 164 has one protrusion inserted into the cover bottom 110 and the other protrusion is inserted into the light guide plate 124 through the support force of the cover bottom 110 . The light guide plate 124 may be firmly supported. On the other hand, the bracket 162 is positioned between the light guide plate 124 and the cover bottom 110 and performs a buffer function between the light guide plate 124 and the cover bottom 110 to support the light guide plate 124 and at the same time to support the light guide plate 124 . ) to support contraction/expansion.

The bracket 162 may be positioned between the side surface of the light guide plate 124 and the cover bottom 110 to support the side surface of the light guide plate 124 and serve as a buffer in the side direction. In addition, the bracket 162 is positioned between the lower surface of the light guide plate 124 and the cover bottom 110 , supports the lower surface of the light guide plate 124 , and may serve as a buffer in the lower surface direction. The bracket 162 may have an 'L' shape to support the side and lower surfaces of the light guide plate 124 .

For convenience of explanation, below, the surface facing the display panel 140 from the light guide plate 124 is referred to as the upper surface, the surface facing the cover bottom 110 is referred to as the lower surface, and the remaining surfaces excluding the upper and lower surfaces are referred to as side surfaces. it is called

FIG. 2 is a plan view illustrating the arrangement of the light guide plate, the light guide plate guide, and the cover bottom in FIG. 1 .

Referring to FIG. 2 , a plurality of guide grooves 210 may be positioned in the light guide plate 124 . The guide groove 210 may be located near or in contact with the side of the light guide plate.

The guide groove 210 may have an open shape at one side. For example, the guide groove 210 may have a 'C' or 'C' shape in plan view. Alternatively, the guide groove 210 may be viewed as having a rectangular shape with one side open. In the embodiment of the rectangular shape in which one side is open, the side surface of the light guide plate 124 may be concavely entered by the guide groove 210 .

The guide pin 164 inserted into the guide groove 210 may come into contact with the bracket 162 through this open side. And, the guide pin 164 is able to move in the direction of the bracket 162 through this open side. Such a structure may be usefully used to support contraction and expansion of the light guide plate 124 . For example, when the light guide plate 124 pushes the guide pin 164 according to the expansion of the light guide plate 124 , if there is no open side in the guide groove 210 , the guide pin 164 moves in any direction. and the light guide plate 124 may not expand and may be wrinkled or cracked.

One side of the guide pin 164 included in the light guide plate guide 160 has a shape corresponding to the guide groove 210 and may be inserted into contact with the guide groove 210 . For example, one side of the guide pin 164 may have a circular or square shape corresponding to the shape of the guide groove 210 . Here, the circular or square shape means a shape of a cross-section or a plane, and from a three-dimensional point of view, the guide pin 164 may have the shape of a cylinder or a square pillar.

As shown in FIG. 1 , the other side of the guide pin 164 may be inserted into the cover bottom 110 . In this way, the guide pin 164 functions to connect the light guide plate 124 and the cover bottom 110 through a structure in which one side is inserted into the light guide plate 124 and the other side is inserted into the cover bottom 110 . Viewed from another side, the guide pin 164 functions as a connecting pin connecting the light guide plate 124 to the cover bottom 110, and viewed from another side, the guide pin 164 connects the light guide plate 124 to the cover bottom ( 110) and functions as a fixing pin.

As the rigidity of the guide pin 164 is higher, the supporting force provided from the cover bottom 110 is effectively transmitted to the light guide plate 124 . In this aspect, the guide pin 164 may be made of a higher rigidity material than the bracket 162 .

The bracket 162 included in the light guide plate guide 160 may be positioned between the light guide plate 124 and the cover bottom 110 to buffer the expansion force of the light guide plate 124 and the support force of the cover bottom 110 . For example, when the light guide plate 124 expands due to heat, an expansion force may be transmitted from the light guide plate 124 to the cover bottom 110 . to be transmitted Conversely, the cover bottom 110 transmits a support force for supporting the light guide plate 124 to the light guide plate 124 , and the bracket 162 buffers this support force and transmits it to the light guide plate 124 .

Due to this cushioning characteristic, the bracket 162 can effectively respond to the contraction and expansion of the light guide plate 124 while supporting the light guide plate 124 .

3A to 3C are views for explaining the principle of the light guide plate guide supporting the light guide plate.

Referring to FIG. 3A , an expansion force F1 and a rotation force F2 may be generated in the light guide plate 124 .

Since the light guide plate 124 is positioned adjacent to a light source, which is one of the heat sources, it may expand by the heat of the light source. When the light guide plate 124 expands, the structure in contact with the light guide plate 124 receives the expansion force F1 from the light guide plate 124 .

Meanwhile, the light guide plate 124 may generate a rotational force F2 . The display device 100 including the light guide plate 124 may be positioned as a portrait type or as a landscape type. When the display device 100 is positioned as a portrait type, the light guide plate 124 ) as they are long in the vertical direction, a rotational force F2 is generated in the light guide plate 124 . If the rotational force F2 generated in the light guide plate 124 is not properly controlled, the distance between the light guide plate 124 and the light source may be unevenly widened and bright lines may be generated in the display device 100 .

The light guide plate guide 160 according to an embodiment may simultaneously control the expansion force F1 and the rotation force F2 of the light guide plate 124 .

3B is a view for explaining that the light guide plate guide controls the expansion force of the light guide plate.

Referring to FIG. 3B , the expansion force F1 of the light guide plate 124 may be generated in a direction (Y direction) perpendicular to the side surface of the light guide plate 124 . At this time, since the bracket 162 is made of an elastic material, it is possible to support the contraction/expansion of the light guide plate 124 by absorbing or buffering the expansion force F1 generated by the light guide plate 124 .

Meanwhile, the bracket 162 , the guide pin 164 , and the light guide plate 124 may be in contact with the side surface of the light guide plate 124 in a direction perpendicular to the side surface (Y direction).

Since the guide pin 164 is made of a rigid material to prevent the flow of the light guide plate 124 , an expansion gap is formed between the guide pin 164 and the light guide plate 124 to support the contraction/expansion of the light guide plate 124 . However, in the structure according to an embodiment, the guide pin 164 and the light guide plate 124 may be substantially in close contact without the need for such an expansion gap. Here, the substantially close contact means that only a substantially negligible gap, such as an assembly gap, exists in the guide pin 164 and the light guide plate 124 . In this way, when it is not necessary to arrange the expansion gap in the direction (Y direction) perpendicular to the side surface of the light guide plate 124 , the bezel can be designed to be thinner.

Meanwhile, the guide pin 164 that prevents the light guide plate 124 from flowing does not act as an obstacle to the contraction and expansion of the light guide plate 124 .

Specifically, the guide pin 164 supports the contraction and expansion of the light guide plate 124 by transmitting the expansion force F1 to the bracket 162 as it is. When the expansion force F1 of the light guide plate 124 is transmitted to the guide pin 164 , since the guide pin 164 is made of a rigid material, the expansion force F1 is transmitted to the bracket 162 as it is. At this time, since the bracket 162, the guide pin 164, and the light guide plate 124 are in contact with the side surface of the light guide plate 124 in the vertical direction (Y direction), the expansion force F1 of the light guide plate 124 is the final end of the bracket. Absorbed or mitigated in (162). In other words, when the light guide plate 124 expands, the guide pin 164 is pushed in the Y direction as much as it expands, and the bracket 162 contracts by the amount of expansion of the light guide plate 124 to support the expansion of the light guide plate 124 . do.

3C is a view for explaining that the light guide plate guide controls the rotational force of the light guide plate.

Referring to FIG. 3C , the rotational force F2 of the light guide plate 124 may be generated in a direction parallel to the side surface of the light guide plate 124 (X direction). Alternatively, even if the rotational force F2 is not completely parallel to the side surface of the light guide plate 124 , a component in a direction parallel to the side surface of the light guide plate 124 (X direction) may be greater than a component in a vertical direction (Y direction).

At this time, the guide pin 164 blocks the rotational force F2 appearing in a direction parallel to the side surface of the light guide plate 124 (X direction).

Since the guide pin 164 is made of a rigid material, it is possible to maintain the supporting force generated by the cover bottom 110 as it is. According to the law of action-reaction, a supporting force F2' corresponding to the rotational force F2 of the light guide plate 124 is generated in the guide pin 164. Due to the rigidity of the guide pin 164, this supporting force F2 ') becomes substantially equal to the rotational force F2. Accordingly, the rotational force F2 and the supporting force F2 ′ cancel each other, thereby preventing the light guide plate 124 from rotating.

A specific embodiment of the light guide plate guide capable of performing the above-described functions will be described with reference to FIGS. 4 to 10 .

4 is a perspective view of a light guide plate guide according to an embodiment, FIG. 5 is a top view of a bracket according to an embodiment, and FIG. 6 is a rear view of the bracket according to an embodiment. 7 is a side view of a light guide plate guide according to an embodiment, and FIG. 8 is a cross-sectional view of the light guide plate guide according to an embodiment.

4 to 8 , the bracket 162 may include a side support part 410 for supporting the side surface of the light guide plate and a lower surface support part 420 for supporting the lower surface of the light guide plate.

Fasteners 431 and 432 for fixing the bracket 162 to the cover bottom 110 may be positioned on the lower surface support part 420 . The lower support part 420 may be coupled with the cover bottom 110 and the screws 441 and 442 through the fasteners 431 and 432 or may be coupled with a pin.

Two or more fasteners 431 and 432 may be positioned on the lower surface support 420 , and the plurality of fasteners 431 and 432 may be arranged in a direction parallel to the side surface of the light guide plate (X direction). For example, when the lower support part 420 is coupled to the cover bottom 110 and the screws 441 and 442 , the lower support part 420 is two or more screws disposed in parallel to the side surface of the light guide plate (X direction). It can be coupled to the cover bottom 110 through (441, 442).

Although not illustrated in the drawings, the lower support part 420 may be coupled to the cover bottom 110 through pins. At this time, one side of the pins inserted into the fasteners 431 and 432 may be formed in a hook shape. The pin may increase the coupling force between the lower surface support part 420 and the cover bottom 110 through such a hook shape.

Although not illustrated in the drawings, the lower support part 420 may be coupled to the cover bottom 110 through an adhesive member. For example, the lower surface support part 420 may be coupled to the cover bottom 110 through a double-sided tape. In this embodiment, the fasteners 431 and 432 may be omitted from the lower support portion 420 .

In the embodiment in which the fasteners 431 and 432 are located in the lower surface support 420 , holes corresponding to the fasteners 431 and 432 may be located in the cover bottom 110 . The screws 441 and 442 or pins inserted into the fasteners 431 and 432 are also inserted into these holes located in the cover bottom 110, thereby increasing the support force of the lower surface support part 420 and the cover bottom 110. there is.

The side support part 410 may be curved. For example, as shown in FIG. 4 , the side support part 410 may have a concave-convex shape, a part may be in contact with the cover bottom 110 , and another part may be in contact with the side surface of the light guide plate. In this embodiment, in addition to the material characteristics of the side support part 410 , it is possible to absorb or relieve the expansion force of the light guide plate by using the shape characteristic of the side support part 410 .

A portion of the side support 410 may be in contact with the side surface of the light guide plate, and the portion in contact with the side surface of the light guide plate may not be in contact with the cover bottom 110 . From another aspect, an air gap 450 may exist in a portion that is in contact with the side surface of the light guide plate. The side support part 410 may absorb or relieve the expansion force of the light guide plate by using the air gap 450 . The air gap 450 may be formed by forming the side support part 410 to be curved.

The bracket 162 may include an insertion hole 460 for fixing the guide pin 164 . The guide pin 164 may be coupled to the bracket 162 through the insertion hole 460 .

5 to 6 , the insertion hole 460 may have a size different from the size of one side and the size of the other side. This shape can increase the coupling force between the bracket 162 and the guide pin 164 while facilitating the insertion operation of the guide pin 164 into the bracket 162 . Specifically, a T-shaped groove may be positioned in the bracket 162 , and the body of the guide pin 164 may have a shape corresponding to the T-shaped groove of the bracket 162 .

7 to 8 , the guide pin 164 may include a first protrusion 710 positioned on one side, a second protrusion 720 positioned on the other side, and a body 730 .

The body 730 may be fixed to the bracket 162 . As the body 730 is fixed to the bracket 162 , the guide pin 164 may move together in the same direction as the bracket 162 . For example, referring back to FIG. 3B , the bracket 162 is positioned in a direction in which the expansion force F1 is transmitted according to the expansion force F1 of the light guide plate 124 (eg, a direction perpendicular to the side surface of the light guide plate (Y direction). )) can be moved. At this time, since the body 730 of the guide pin 164 is fixed to the bracket 162 , the guide pin 164 may move together in the same direction as the bracket 162 .

Meanwhile, referring to FIG. 8 , the body 730 may include a third protrusion 732 having a shape protruding in a vertical direction from the axis formed by the first protrusion 710 and the second protrusion 720 . there is. The third protrusion 732 may increase the coupling force between the body 730 and the bracket 162 while being inserted into the bracket 162 .

The first protrusion 710 may be inserted into the guide groove positioned on the light guide plate, and the second protrusion 720 may be inserted into the mounting groove positioned at a point corresponding to the guide groove on the cover bottom. Through this structure, the guide pin 164 may transmit the supporting force of the cover bottom to the light guide plate. Specifically, the supporting force of the cover bottom is transmitted in the order of the second protrusion 720 , the body 730 , and the first protrusion 710 of the guide pin 164 . And, the support force transmitted to the guide pin 164 is transmitted to the light guide plate through the first protrusion 710 .

9 is a perspective view of a light guide plate and a light guide plate guide inserted into a cover bottom according to an exemplary embodiment.

Referring to FIG. 9 , the light guide plate guide includes a bracket 162 and a guide pin 164 .

In addition, the bracket 162 includes a side support portion 410 and a lower surface support portion 420 .

The side support part 410 includes an air gap 450 , and the lower surface support part 420 includes fasteners 431 and 432 . In addition, the lower support part 420 may be coupled to the cover bottom 110 through screws 441 and 442 inserted into the fasteners 431 and 432 .

The light guide plate, the light guide plate guide, and the cover bottom may be coupled through a guide pin 164 included in the light guide plate guide.

The guide pin 164 connects the light guide plate, the light guide plate guide and the cover bottom through the first protrusion 710 inserted into the light guide plate, the second protrusion 720 inserted into the cover bottom, and the body 730 inserted into the bracket 162 . can be combined. These guide pins 164 may have a cross shape.

10 is a view of the mounting groove and the light guide plate guide of the cover bottom as viewed from the rear direction of the cover bottom according to an exemplary embodiment.

Referring to FIG. 10 , the second protrusion 720 of the guide pin included in the light guide plate guide may be inserted into the mounting groove 1110 of the cover bottom 110 . The mounting groove 1110 may be located at a point corresponding to the guide groove 210 of the light guide plate 124 described with reference to FIG. 2 .

Flow gaps FGa and FGb may be positioned in the mounting groove 1110 in a direction perpendicular to the side surface of the light guide plate (Y direction) or in a direction perpendicular to the side direction of the cover bottom 110 . These flow gaps (FGa, FGb) supporting the flow of the second protrusion 720 are in the mounting groove 1110 of the cover bottom 110, from the second protrusion, in a direction perpendicular to the side surface of the light guide plate (Y direction) can be located in Due to the expansion and contraction of the light guide plate, the bracket may move in a direction perpendicular to the side surface of the light guide plate (Y direction), and the guide pin coupled to the bracket may also move in a direction perpendicular to the side surface of the light guide plate (Y direction). At this time, since the flow gaps FGa and FGb are positioned in the mounting groove 1110 , the guide pin can move in a direction perpendicular to the side surface of the light guide plate (Y direction) without being disturbed by the cover bottom.

The lengths of the first flow gap FGa and the second flow gap FGb positioned in the mounting groove 1110 may be determined according to the shrinkage of the light guide plate and the amount of change (expansion or shrinkage) of the bracket due to expansion.

Meanwhile, an expansion gap may be positioned in the guide groove of the light guide plate. The bracket may support contraction and expansion in a direction perpendicular to the side surface of the light guide plate, and the aforementioned expansion gap may support contraction and expansion of the light guide plate in a direction parallel to the side surface of the light guide plate.

11 is a view for explaining an expansion gap of a light guide plate according to an exemplary embodiment.

Referring to FIG. 11 , guide groove expansion gaps PG2a and PG2b supporting expansion in a direction parallel to the side surface of the light guide plate 124 may be located in the guide groove 210 of the light guide plate 124 . The guide groove expansion gaps PG2a and PG2b may be located in the guide groove 210 of the light guide plate 124 , from the first protrusion, in a direction parallel to the side surface of the light guide plate 124 .

Meanwhile, the light guide plate guide may be located on a side of the light guide plate 124 where the light source is not located. In addition, the fixing pin 1110, not the light guide plate guide, may be positioned on the light incident part where the light source is located in the light guide plate 124 .

The fixing pin 1110 is inserted into the fixing groove 1120 located on the light incident part side of the light guide plate 124, passes through the fixing groove 1120 and is coupled to the cover bottom to couple the light guide plate 124 to the cover bottom. there is.

Since the fixing pin 1110 does not include the same structure as the bracket 162 included in the light guide plate guide, to support the contraction and expansion of the light guide plate 124 in a direction perpendicular to the side surface of the light guide plate 124 . It includes a fixed groove expansion gap (PG1).

The fixed groove expansion gap PG1 is also positioned in a direction parallel to the side surface of the light guide plate 124 and also supports contraction and expansion of the light guide plate 124 in a direction parallel to the side surface of the light guide plate 124 .

The fixing groove 1110 may include a fixing groove expansion gap PG1 surrounding the fixing pin 1120 to support expansion of the light guide plate 124 in all directions. Also, the fixing groove 1110 may have a round shape to form the fixing groove expansion gap PG1.

On the other hand, the guide groove 210 may only support expansion in a direction parallel to the side surface of the light guide plate 124 . Accordingly, the guide groove expansion gaps PG2a and PG2b may be positioned only in a direction parallel to the side surface of the light guide plate 124 . In addition, the guide groove 210 may have a rectangular shape depending on the positions of the guide groove expansion gaps PG2a and PG2b.

Meanwhile, a plurality of guide grooves 210 may be positioned on one side of the light guide plate. At this time, when the guide groove 210 is located on the horizontal and vertical central axis of the light guide plate 124 , the expansion gap may be located on both sides of the guide groove 210 like the second guide groove expansion gap PG2b. And, when the guide groove 210 is not located on the horizontal and vertical central axis of the light guide plate 124 , the expansion gap is located only in the direction toward the horizontal and vertical central axis of the light guide plate 124 like the first guide groove expansion gap PG2a . can do. As a specific example, three or more guide grooves 210 are positioned toward the light carrying-in part of the light guide plate 124, and the guide groove expansion gap in the guide grooves 210 positioned at both ends of the three or more guide grooves 210 is the light guide plate ( 124) can be located only in the direction toward the central axis.

As described above, according to the present invention, there is an effect that the light guide plate can be contracted and expanded while preventing breakage due to flow by fixing the light guide plate. In addition, according to the present invention, the light guide plate can be contracted and expanded while the rotational force generated in the light guide plate is properly supported.

Referring to the display device according to the above-described embodiment, the display device may include a light guide plate guide supporting the light guide plate. Such a light guide plate guide may include a bracket made of an elastic material and a guide pin made of a rigid material. By using such a heterogeneous structure, it is possible to prevent the flow of the light guide plate while supporting the contraction and expansion of the light guide plate.

The display device may be disposed in a landscape type or a portrait type. When the display device is disposed in a portrait type, a rotational force may be generated in the light guide plate. The display device according to the above-described embodiment may include a light guide plate guide supporting the light guide plate. The light guide plate guide includes a bracket and a guide pin, supports contraction and expansion of the light guide plate, and can absorb the rotational force of the light guide plate. there is.

Terms such as "include", "comprise" or "have" described above mean that the corresponding component may be embedded, unless otherwise stated, and does not exclude other components. It should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (15)

a light guide plate having a plurality of guide grooves;
a cover bottom having a plurality of mounting grooves positioned to correspond to the guide grooves; and
A light guide plate guide comprising a bracket positioned between the light guide plate and the cover bottom and supporting a side surface of the light guide plate, and a guide pin fixed to the bracket.
including,
The guide pin includes a body fixed to the bracket, a first protrusion inserted into the guide groove of the light guide plate, and a second protrusion inserted into the mounting groove of the cover bottom,
The body has a higher rigidity than the bracket. delete According to claim 1,
A display device in which one side of the guide groove of the light guide plate is open. 4. The method of claim 3,
The bracket, the guide pin, and the light guide plate are in contact with a side surface of the light guide plate in a vertical direction. According to claim 1,
The mounting groove of the cover bottom,
A display device having a gap positioned from the second protrusion in a direction perpendicular to a side surface of the light guide plate. According to claim 1,
The guide groove of the light guide plate,
A display device having a gap positioned in a direction parallel to a side surface of the light guide plate from the first protrusion. 7. The method of claim 6,
A display device in which three or more guide grooves are positioned toward the light carrying-in part of the light guide plate, and the gap in the guide grooves positioned at both ends of the three or more guide grooves is positioned only in a direction toward a central axis of the light guide plate. According to claim 1,
In the bracket, a portion supporting a side surface of the light guide plate is curved. According to claim 1,
The bracket includes a side support part supporting a side surface of the light guide plate and a lower surface support part supporting a lower surface of the light guide plate. 10. The method of claim 9,
The bracket is a display device in which the lower support portion is coupled to the cover bottom through an adhesive member. 10. The method of claim 9,
The bracket is a display device in which the lower support portion is coupled to the cover bottom through a screw. 12. The method of claim 11,
The bracket is coupled to the cover bottom through two or more screws disposed in a direction parallel to a side surface of the light guide plate. According to claim 1,
A display device in which a T-shaped groove corresponding to a body shape of the guide pin is positioned in the bracket. According to claim 1,
A display device in which a fixing groove is positioned on a light incident part side of the light guide plate and a fixing pin coupled to the cover bottom is inserted into the fixing groove. 15. The method of claim 14,
The guide groove of the light guide plate has a rectangular shape, and the fixing groove of the light guide plate has a round shape.

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