KR20190055891A - Display device and its manufacturing method - Google Patents

Abstract

The present application relates to a display device capable of arranging a light guide plate fixing member on a light entering part in a bent back cover structure. According to the present application, the present application comprises: a backlight unit including a light guide plate having the light entering part and a light source module for irradiating light to the light entering part of the light guide plate; a display panel disposed on the backlight unit; a back cover for supporting the backlight unit; and a light guide plate fixing member disposed between the light guide plate and the back cover overlapping the light entering part of the light guide plate.

Description

DISPLAY DEVICE AND ITS MANUFACTURING METHOD [0002]

The present application relates to a display device and a method of manufacturing the same.

The display device can display an image to provide visual information to the user. Display devices include tablet devices, notebook computers, monitors, and portable terminals. Among the types of display devices, liquid crystal displays (Liquid Crystal Displays) are widely used. The liquid crystal display device has advantages of low power consumption due to low operating voltage and being portable.

When the display device is a liquid crystal display device, the display panel for displaying an image in the display area includes a TFT substrate, an opposing substrate, and a liquid crystal layer formed between the TFT substrate and the opposing substrate. The liquid crystal display adjusts the arrangement of the liquid crystal layer according to whether an electric field is applied or not, thereby adjusting the transmittance of light. Accordingly, the liquid crystal display device has a backlight unit that can serve as a light source of the display panel.

In order to reduce the thickness of the display device, an edge type backlight unit in which the light source of the backlight unit is disposed on the side of the liquid crystal display panel can be used. In the case of an edge type backlight unit, the backlight unit includes a light guide plate (LGP) for guiding the light emitted from the light source to the liquid crystal display panel in a lower portion of the liquid crystal display panel.

In a module manufacturing process of a display device, a light source is mounted inside a rear cover that protects the display device from an external impact, and a reflective sheet for reflecting light directed to a lower portion of the light guide plate upward is formed. Thereafter, the light guide plate is inserted into the rear cover.

There is a case where the backlight unit of the display device is completely inserted into the rear cover in some cases. When the light guide plate fixing member is disposed adjacent to the light entrance portion in which the light source of the display device having the curved rear cover structure is disposed, there arises a problem that the light guide plate is not inserted by the light guide plate fixing member during the process of inserting the light guide plate. Therefore, in the bent back cover structure, the light guide plate fixing member is disposed on the light entering / receiving portion of the display device. In the case of disposing the light guide plate member in the return light portion, there is a problem that the width of the bezel which is a non-display region formed in the frame excluding the display region in the return light portion increases. Further, in the case of disposing the light guide plate fixing member on the return light portion, there is a problem that the light entrance portion of the backlight unit is not fixed but may flow and be damaged due to an external impact.

The present application is intended to provide a display device capable of disposing a light guide plate fixing member on a light-incident portion in a bent back cover structure.

It is another object of the present invention to provide a display device capable of preventing breakage due to flow of a light-incoming portion of a backlight unit even when an external impact is applied to the back cover.

A display device according to the present application includes a backlight unit including a light guide plate having a light-incident portion and a light source module for irradiating light to the light-incident portion of the light guide plate, a display panel disposed on the backlight unit, a back cover for supporting the backlight unit, And a light guide plate fixing member disposed between the light guide plate and the rear cover overlapping the light entrance portion.

A manufacturing method of a display device according to the present application is characterized by providing a back cover for supporting a backlight unit, a reflective sheet for reflecting light of the backlight unit, and a light source module for irradiating light to the light- Inserting the light guide plate into the space formed by the first cover frame, the cover side wall, and the bending cover portion of the rear cover, and forming the light guide plate fixing member between the light guide plate and the rear cover overlapping the light entrance portion of the light guide plate .

The present application is capable of disposing a light guide plate fixing member on a light entrance portion of a light guide plate in a bent back cover structure. Accordingly, the display device according to the present invention has a reduced degree of freedom in bezel design on three surfaces except for the light-incoming portion, and can realize a narrow bezel having a width of 1.0 mm or more and 1.5 mm or less.

Also, in the method of manufacturing a display device according to the present application, the light guide plate is inserted in the bent back cover structure, and then the light guide plate fixing member is disposed on the lower surface of the light guide plate. Accordingly, the manufacturing method of the display device according to the present application can facilitate the insertion of the light guide plate in the module manufacturing process, thereby increasing the manufacturing efficiency of the display device.

In addition, the display device according to the present application can prevent the breakage due to the flow of the light-incident portion of the backlight unit even when the back cover is subjected to an external impact by disposing the light guide plate fixing member on the light-

1 is a perspective view showing a display device according to an example of the present application.
2 is an exploded view of the display device shown in Fig.
3 is a cross-sectional view taken along line I-I 'of FIG.
4 is a cross-sectional view taken along line II-II 'shown in FIG.
5 is a cross-sectional view according to another example of the line I-I 'shown in Fig.
6 is a cross-sectional view according to another example of the line II-II 'shown in FIG.
7 is a view for explaining an arrangement structure of a rear cover according to an example of the present application.
8 is a sectional view of the line III-III 'shown in FIG.
9 to 12 are views showing a module manufacturing process of a display device according to an example of the present application.

Brief Description of the Drawings The advantages and features of the present application, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that this application is not limited to the examples disclosed herein, but may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein, To fully disclose the scope of the invention to those skilled in the art, and this application is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like described in the drawings for describing an example of the present application are illustrative, and thus the present application is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the description of the present application, a detailed description of known related arts will be omitted if it is determined that the gist of the present application may be unnecessarily obscured.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the scope of the present application.

The terms " first horizontal axis direction ", " second horizontal axis direction ", and " vertical axis direction " should not be interpreted solely by the geometric relationship in which the relationship between them is vertical, It may mean having a wider directionality in the inside.

It should be understood that the term " at least one " includes all possible combinations from one or more related items. For example, the meaning of " at least one of the first item, the second item and the third item " means not only the first item, the second item or the third item, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

Each of the features of the various embodiments of the present application may be combined or combined with each other partially or entirely, technically various interlocking and driving are possible, and the examples may be independently performed with respect to each other, .

Hereinafter, preferred examples of the display device according to the present application will be described in detail with reference to the accompanying 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 drawings, the X axis defines the direction from left to right of the display device, the Y axis defines the direction from the bottom to the top of the display device, and the Z axis indicates the direction from the back of the display device to the front direction, Direction.

1 is a perspective view showing a display device according to an example of the present application. The display device according to the present application includes a display panel 100, a panel guide 500, and a rear cover 700.

The display panel 100 displays an image using light irradiated from the bottom. The display panel 100 drives the liquid crystal layer according to an electric field formed for each pixel by a data voltage and a common voltage applied to each pixel. The display panel 100 displays an image in accordance with light transmitted through the liquid crystal layer.

The display panel 100 includes a display area AA for displaying an image and a non-display area NDA formed in a frame except for the display area AA. In the display area AA, wirings for supplying signals and voltages to pixels and pixels for displaying an image are disposed.

The non-display area NDA generates signals and voltages necessary for displaying an image in the display area AA and the panel guide 500 and the back cover 700 that protect the display area AA from external impact Driving circuits for supplying the display area AA are arranged. A non-display area (NDA) that the user can visually recognize from the front of the display device can be defined as a bezel.

The panel guide 500 is accommodated in the rear cover 700. The panel guide 500 supports the edge portion of the display panel 100. The panel guide 500 is formed of a plastic material or a metal material. The panel guide 500 is provided in the form of a rectangular band with one side opened. The panel guide 500 has a shape in which one side is open, thereby reducing the width of the rim.

The rear cover 700 is disposed below the display panel 100 and the panel guide 500. The rear cover 700 provides a space for accommodating the display panel 100 and the panel guide 500.

2 is an exploded view of the display device shown in Fig. 3 is a cross-sectional view taken along line I-I 'of FIG. 4 is a cross-sectional view taken along line II-II 'shown in FIG. 4 is a cross-sectional view according to another example of the line I-I 'shown in Fig. 4 is a cross-sectional view according to another example of the line II-II 'shown in FIG.

The display apparatus according to the present invention includes a backlight unit 300 including a light guide plate 310 having a light entrance portion 310a and a light source module 330 for irradiating light to the light entrance portion 310a of the light guide plate 310, A rear cover 700 for supporting the backlight unit 300 and a rear cover 700 for overlapping the light-incident portion 310a of the light guide plate 310 and the light guide plate 310 And a light guide plate fixing member 800 disposed between the light guide plate fixing member 800 and the light guide plate fixing member 800.

The display panel 100 displays an image using light emitted from the backlight unit 300. The display panel 100 includes a lower substrate 110, an upper substrate 130, a lower polarizing member 150, and an upper polarizing member 170 which are opposed to each other with a liquid crystal layer interposed therebetween.

The lower substrate 110 is a thin film transistor array substrate which is a transparent glass substrate on which a thin film transistor on a matrix is formed. The lower substrate 110 includes a pixel array having a plurality of pixels formed in each pixel region intersecting with a plurality of gate lines and a plurality of data lines do. Each of the plurality of pixels includes a thin film transistor connected to the gate line and the data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage. A pad portion connected to each signal line is provided at one side edge portion of the lower substrate 110. The pad portion is connected to a plurality of data driving integrated circuits 210 and a plurality of gate driving integrated circuits 230 constituting the panel driving circuit 200. A data line is connected to a source terminal of the lower substrate 110, and a gate line is connected to a gate terminal. The data lines and gate lines are connected to the panel drive circuit 200.

The upper substrate 130 is a color filter array substrate in which R, G, and B pixels, which are color pixels through which a predetermined color is emitted as a light passes, are formed by a thin film process. The upper substrate 130 defines an opening region overlapping each pixel region formed on the lower substrate 110 And a color filter layer formed in the opening region. The upper substrate 130 is adhered to the lower substrate 110 with a liquid crystal layer interposed therebetween by a sealant. The upper surface of the upper substrate 130 defines a display area AA. Accordingly, the area outside the upper surface of the upper substrate 130 is defined as the non-display area NDA.

The liquid crystal layer is interposed between the lower substrate 110 and the upper substrate 130. The liquid crystal layer is composed of a liquid crystal in which the arrangement direction of the liquid crystal molecules is changed in accordance with the data voltage applied to the pixel electrode and the electric field formed by the common voltage for each pixel.

The lower polarizing member 150 is attached to the lower surface of the lower substrate 110. The lower polarizing member 150 polarizes the light incident from the backlight unit 300 to a first polarization axis and irradiates the lower substrate 110 with the polarized light.

The upper polarizing member 170 is attached to the upper surface of the upper substrate 130. The upper polarizing member 170 polarizes light emitted from the upper substrate 130 to the outside through a second polarizing axis.

The panel drive circuit 200 displays the color image on the display panel 100 by driving each pixel of the display panel 100. The panel driving circuit 200 includes a plurality of data driving integrated circuits 210 and a plurality of gate driving integrated circuits 230.

Each of the plurality of data driving integrated circuits 210 is directly mounted on one side edge portion of the lower substrate 110 and connected to a plurality of data lines and connected to a pad portion provided on the lower substrate 110. The plurality of data driving integrated circuits 210 receive the pixel data and the data control signal for each pixel supplied from the timing control circuit and convert the pixel data for each pixel into analog data signals in accordance with the data control signal, .

Each of the plurality of gate driving integrated circuits 230 is directly mounted on the other edge of the lower substrate 110 and is connected to a plurality of gate lines and connected to a pad portion provided on the lower substrate 110. The plurality of gate driving integrated circuits 230 receives the gate control signals supplied from the timing control circuit, generates gate pulses in accordance with the gate control signals, and supplies them to the gate lines in a predetermined order.

The timing control circuit arranges the digital image data input from the driving system in response to a timing synchronizing signal that is mounted on the printed circuit board and supplied from an external driving system so as to be suitable for the pixel arrangement structure of the display panel 100, And provides the generated pixel-by-pixel data to the plurality of data driving ICs 210. [ Further, the timing control circuit generates a data control signal and a gate control signal, respectively, based on the timing synchronization signal to control the driving timings of the plurality of data driving integrated circuits 210 and the plurality of gate driving integrated circuits 230, respectively.

Each of the plurality of data driving integrated circuits 210 may be mounted on a plurality of flexible circuit films without being mounted on the lower substrate 110. [ In addition, each of the plurality of gate driving integrated circuits 230 may be replaced with a built-in gate driving circuit formed directly on the right edge portion of the lower substrate 110. [ The built-in gate driving circuit is formed at one side edge portion of the lower substrate 110 together with the thin film transistor manufacturing process of each pixel so as to be connected one to one with a plurality of gate lines. The built-in gate driving circuit generates a gate pulse in accordance with an input gate control signal and supplies the generated gate pulse to a gate line corresponding to a predetermined sequence.

The backlight unit 300 is disposed so as to overlap with the display panel 100. The backlight unit 300 irradiates light to the rear surface of the display panel 100. The backlight unit 300 includes a light guide plate 310, a light source module 330, a light source housing 350, a reflective sheet 370, and an optical sheet unit 390.

The light guide plate 310 is arranged to overlap with the display panel 100. The light guide plate 310 is provided with a light-incident portion 310a on a sidewall of one side edge portion. The light guide plate 310 may include a light-transmitting plastic or glass material. The light guide plate 310 may be made of polymethyl methacrylate (PMMA), which has high strength and is not easily deformed or broken, and has high transmittance.

The light guide plate 310 allows the light generated by the light source module 330 to enter the light guide 310a through the light entrance 310a. The light guide plate 310 guides light incident thereon or guides the incident light to the display panel 100 side. That is, the light guide plate 310 receives the light supplied to the display panel 100 from the light source module 330. The light guide plate 310 guides light and emits light to the display panel 100. The light guide plate 310 has a light entrance portion 310a and a light entrance portion 310b.

The light-incident portion 310a is positioned to face the light source module 330. FIG. The light-incident portion 310a is formed on one side surface of the light guide plate 310. [ For example, in FIG. 2, the light-incident portion 310a is disposed on the first side S1. The light-incident portion 310 a receives light emitted from the light source module 330. The light-incident portion 310a may be designed to have a thicker thickness than the other side to receive light. The light incident on the light-incident portion 310a is guided through total internal reflection in the light guide plate 310. [

The light-receiving portion 310b is formed on the other side surface of the light guide plate 310. [ In the light input / output part 310b, all light incident on the light entering part 310a is emitted toward the display panel 100. [ The light-receiving portion 310b may be designed to have a thin thickness relative to the light-incident portion 310a in order to emit light toward the display panel 100. [

The light source module 330 irradiates the light entering portion 310a provided in the light guide plate 310 with light. The light source module 330 is provided on a side surface of the display panel 100 and is fixedly supported by the panel guide 500 to provide uniform light to the display panel 100. The light source module 330 includes a light source 331 that emits light to the light entering portion 310a of the light guide plate 310 and a light source mounting portion 333 that mounts the light source 331. [ Each of the light sources 331 is mounted on the light source mounting portion 333 so as to have a predetermined interval along a first direction X parallel to the longitudinal direction of the light entering portion 310a. The interval or the pitch of adjacent light sources 331 may be set to a range in which hot spots are not generated in the vicinity of the light incident portion 310a or in the light incident portion 310a. The light source mounting portion 333 is designed to cover the light-incident portion 310a of the light guide plate 310 so that the light emitted from the light source 331 can prevent the light leakage from being emitted from the edge portion of the display panel 100 .

The light source housing 350 is disposed to cover the light source module 330. The light source housing 350 covers the one side edge portion of the light source module 330, the light guide plate 310 having the light entrance portion 310a, and the light source module 330 and the light guide plate 310. The light source housing 350 supports one side edge portion of the optical sheet portion 390. The light source housing 350 reflects the light emitted from the light source module 330 toward the light entering portion 310a of the light guide plate 310 to thereby prevent light loss and light leakage. The light source housing 350 includes a plastic material of white color for reflection of incident light. The light source housing 350 may be attached to the rear cover 700 through the adhesive member 600.

The reflective sheet 370 is disposed below the light guide plate 310 to cover the rear surface of the light guide plate 310. [ The reflective sheet 370 reflects the light incident from the light guide plate 310 toward the light guide plate 310, thereby minimizing the loss of light. The reflective sheet 370 reflects the light to be emitted to the lower portion of the light guide plate 310 in the direction of the display panel 100 to increase the light efficiency and adjust the reflection amount of the entire incident light so that the entire emission surface has a uniform luminance distribution. do.

The optical sheet unit 390 is disposed on the upper surface of the light guide plate 310 to improve the brightness characteristics of light emitted from the light guide plate 310. The optical sheet portion 390 may include a lower diffusion sheet, a lower prism sheet, and an upper prism sheet. However, the present invention is not limited thereto, and a diffusion sheet, a prism sheet, a dual brightness en- a hancement film, and a lenticular sheet.

The optical sheet portion 390 is for diffusing and condensing the light incident from the light guide plate 310 and includes a diffusion sheet, a prism sheet, and a protective sheet. The diffusion sheet is composed of a base plate and a bead coating layer formed on the base plate. The diffusion sheet diffuses light from the light source module 330 and supplies the light to the display panel 100. The prism sheet is formed such that a prism having a triangular prism shape is arranged on the upper surface of the prism sheet, and the light diffused in the diffusion sheet is condensed in a direction perpendicular to the plane of the display panel 100. The protective sheet protects the prism sheet weak against scratches.

The panel guide 500 covers the edges of the light guide plate 310 and the optical sheet unit 390 and supports the display panel 100 disposed on the upper side. The panel guide 500 is formed at a predetermined height on a side surface of the light guide plate 310 excluding a side surface on which the light entrance portion 310a and the backlight unit 300 are disposed. The panel guide 500 is formed of plastic or metal.

The panel guide 500 may have a shape in which one side is opened so as not to cover the other part except the one side and the other side of the light source module 330, thereby reducing the width of the edge of the part where the light source module 330 is disposed . The panel guide 500 does not have a lower guide sidewall disposed between the rear cover 700 and the light source module 330 so as to surround the side surface of the light source module 330. Therefore, Can be reduced. The panel guide 500 includes a panel support 510 and a guide sidewall 530.

The panel supporting portion 510 overlaps with the rear edge portion of the display panel 100. The panel supporting portion 510 supports a rear edge portion of the display panel 100 through a panel supporting pad 400 such as a cushion pad or double-sided tape. The panel supporting portion 510 supports the rear edge portion of the display panel 100 except for a part of the lower edge of the display panel 100.

The guide sidewall 530 supports the panel support 510. The guide sidewall 530 is provided perpendicular to the front edge of the panel support 510. The guide sidewall 530 surrounds each of the other side surfaces except the lower side surface portion of the display panel 100.

The upper surface of the guide sidewall 530 of the panel guide 500 may be attached to the lower substrate 110 through the guide bonding member 740 at a side adjacent to the receiving light portion 310b of the light guide plate 310. [ Accordingly, the panel guide 500 can stably fix the lower substrate 110.

The rear cover 700 is in the form of a rectangular plate. The rear cover 700 is disposed at the lowermost portion of the display device. The rear cover 700 protects components inside the display device from external impact. The rear cover 700 may be formed of a material such as metal or reinforced plastic. The back cover 700 includes a bottom frame 710, a cover side wall 730, and a bending cover portion 750.

The bottom frame 710 is disposed on the lower surface of the display device. The bottom frame 710 may include a slit.

The slit may be disposed on one side of the bottom frame 710. The slit may be disposed on a region of the bottom frame 710 adjacent to the first side S1 on which the light entrance portion 310a of the light guide plate 310 is disposed. The slit may be covered by the light entering portion 310a of the light guide plate 310. [

The bottom frame 710 provides a storage space for the backlight unit 300. The bottom frame 710 supports the light source module 330 of the backlight unit 300.

Further, the bottom frame 710 supports the lower area of the backlight unit 300. [ The bottom frame 710 supports the light entering portion 310a and the entering light entering portion 310b of the light guide plate 310. [

A hole having a predetermined size may be formed in the bottom frame 710. The bottom frames 710 and 710 may include a first bottom surface 711 to a third bottom surface 712.

The first bottom surface 711 is provided in the form of a rectangular plate. The first bottom surface 711 supports the lower surface of the display area ACT of the display device.

The second bottom surface 712 is provided in the form of a rectangular band having a stepped portion compared to the first bottom surface 711. The second bottom surface 712 supports the light guide plate 310 and the reflective sheet 370 of the backlight unit 300.

The third bottom surface 713 is provided in the form of a rectangular band with a step difference as compared with the second bottom surface 712. The third bottom surface 713 supports the panel guide 500 and the light source module 330 of the backlight unit 300.

 The second bottom surface 712 may be stepped from the first bottom surface 711 to have a height corresponding to the thickness of the reflective sheet 370. The second bottom surface 712 has a step relative to the first bottom surface 711, thereby increasing the rigidity of the bottom frame 710. The bottom frame 710 may have increased rigidity due to the bending portion between the first bottom surface 711 and the second bottom surface 712.

The cover side wall 730 is formed in the upper direction from the lower portion of the display device so as to surround one side of the display device. The cover side wall 730 surrounds one side of the backlight unit 300. The cover side wall 730 is provided at an edge portion of the bottom frame 710. The cover side wall 730 covers the side surface of the light source unit 330 of the backlight unit 300 and the side surface of the panel guide 500. The cover side wall 730 is vertically bent from the bottom frame 710 to cover the side surface of the light source module 330 and the side surface of the panel guide 500. The cover side wall 730 covers the side surface of the panel guide 500, which is thinly provided for slimness and weight saving, to prevent the panel guide 500 from being deformed. The cover side wall 730 includes first to fourth bending sidewalls.

The first bending side wall or the first long side wall is bent from the first side S1 of the bottom frame 710 to wrap the light source module 330 of the backlight unit 300. [

The second bending side wall or the second long side wall is bent from the second side (S2) of the bottom frame (710) to wrap the first long side or the upper side of the panel guide (500).

The third bending sidewall or first side sidewall is bent from the third side S3 of the first and the bottom frames 710, 710 to wrap the first short side or the left side of the panel guide 500.

The fourth bending sidewall or second side sidewall is bent from the fourth side S4 of the first and bottom frames 710, 710 to wrap the second or right side of the panel guide 500.

The first to fourth bending side walls have a hemming structure in order to secure the rigidity of the rear cover 700. The first through fourth bending sidewalls include inner sidewalls vertically bent from the first and the bottom frame 710 and outer sidewalls bent from the inner sidewalls to contact the outer sidewalls or inner sidewalls of the inner sidewalls.

The bending cover portion 750 is disposed on the outer periphery of a part of the upper surface of the display device. The bending cover portion 750 is provided extending from the upper portion of the cover side wall 730 adjacent to the light source module 330. The bending cover portion 750 extends from the top of the first bending sidewall that is the cover side wall 730 adjacent to the light source module 330 and is bent in parallel with the bottom frame 710. The front surface of the bending cover portion 750 is disposed to face the display panel 100 and the rear surface thereof is disposed to face the light source module 330. The bending cover portion 750 covers the light source module 330 disposed between the first bending side wall and the light guide plate 310. The bending cover portion 750 is coupled to the light source housing 350 through the adhesive member 600.

The bending cover portion 750 supports the lower edge portion of the display panel 100. The bending cover portion 750 supports the lower edge portion of the display panel 100 through the panel supporting pad 400. The bending cover portion 750 supports the light source housing 350 covering the light source module 330.

The bottom frame 710, the cover sidewall 730, and the bending cover portion 750 implement the flexure back cover 700 structure. The back cover 700 having the bent back cover 700 structure is formed to cover not only the lower portion of the backlight unit 300 but also the side and upper portions of the light source module 330 to cover the backlight unit 300 and the light source module 330 can be stably mounted.

The rear cover 700 may further include a plurality of brackets 770. The plurality of brackets 770 are bent in a direction opposite to the bending cover portion 750 from the upper portions of the cover side walls 730 provided on one side and the other side of the long side of the rear cover 700, respectively. Each of the plurality of brackets 770 can be engaged with a hinge portion provided on the body of the display device by a screw. However, the present invention is not limited thereto, and can be coupled to a cover of a display device that covers the rear cover 700 by a screw. The plurality of brackets 770 include at least one screw through hole through which the threaded portion of the screw passes.

The rear cover 700 according to an exemplary embodiment includes a plurality of support brackets 790 that are bent from one side of a bottom frame 710 that supports the light source module 330 to support the printed circuit board of the panel drive circuit 200 . Each of the plurality of support brackets 790 is cut from one side of the bottom frame 710 supporting the light source module 330 and bent at least once toward the back side of the printed circuit board to support the back side of the printed circuit board. Each of the plurality of support brackets 790 is coupled to the printed circuit board by a substrate securing screw that passes through the printed circuit board. The printed circuit board includes a ground electrode electrically connected to each of the plurality of support brackets 790 while being coupled thereto. When the rear cover 700 is made of a metal material, the ground electrode provided on the printed circuit board can be electrically grounded.

The light guide plate fixing member 800 is disposed in the non-display area NDA. The light guide plate fixing member 800 may be disposed between the light guide plate 310 and the rear cover 700 which overlaps the light entrance portion 310a of the light guide plate 310. [ The light guide plate fixing member 300 fixes the light guide plate 310 to prevent the light guide plate 310 from flowing.

When the light guide plate fixing member 800 is disposed on the rear cover 700 which overlaps the light entrance 310b of the light guide plate 310, the width of the bezel in the area where the light entrance 310b is disposed There is an increasing problem.

The light guide plate fixing member 800 according to an exemplary embodiment of the present invention is disposed on the lower surface of the light guide plate 310 adjacent to the light entrance portion 310a of the light guide plate 310. [ The light guide plate fixing member 800 is disposed on a region where the spacing space is formed due to a hole or through structure provided in the rear cover 700 of the lower surface of the light guide plate 310. [ The light guide plate fixing member 800 is disposed on an area where the rear cover 700 is not disposed, of the areas overlapping the lower surface of the light guide plate 310. [

The rear cover 700 of the present application has a bottom frame 710, a cover side wall 730, and a bending cover portion 750. The bottom frame 710 forms the bottom surface of the rear cover 700. The bottom frame 710 is spaced a predetermined distance. The light guide plate fixing member 800 is inserted into the slit formed inside the bottom frame 710.

In the case of fixing the region adjacent to the light entrance portion 310a of the light guide plate 310, the fixing member provided in the light entrance / exit portion 310b of the light guide plate 310 may be omitted. Accordingly, the width of the bezel of the light input / output part 310b of the light guide plate 310 according to an exemplary embodiment of the present invention can be reduced.

Display area NDA of the light inputting portion 310a of the light inputting portion 310b of the light guide plate 310 in order to explain the width reduction of the bezel of the light inputting portion 310b of the light guide plate 310 in detail, The structure is shown in detail in Fig. The non-display area NDA of the light-entering portion 310b of the light guide plate 310 according to an exemplary embodiment includes first to third widths D1 to D3.

The first width D1 is a distance between a side of the upper substrate 130 adjacent to the receiving light portion 310b of the light guide plate 310 and a side surface of the receiving light portion 310b of the light guide plate 310. [ The second width D2 is a distance between the side surface of the light inputting portion 310b of the light guide plate 310 and the inner side wall of the panel guide 500. [ The third width D3 is the width of the guide sidewall 530 constituting the panel guide 500.

In order to reduce the width of the bezel of the receiving light portion 310b, at least one of the first to third widths D1 to D3 must be reduced in size. The second width D2 is the width of the light guide plate 310, the reflective sheet 370, and the optical sheet portion 390, which are rolled up during the module manufacturing process or adhered to the light guide plate fixing member 800, Is the minimum margin to prevent the The second width D2 may be 0.25 mm or more and 0.35 mm or less. Since the third width D3 is the width of the guide sidewall 530 constituting the panel guide 500, the third width D3 should be designed to be at least the minimum thickness for the rigidity of the display device. Accordingly, the third width D3 may be 0.55 mm or more and 0.65 mm or less, respectively. Therefore, when the size of the first width D1 is minimized, it is possible to reduce the width of the bezel of the return light portion 310b.

When the light guide plate fixing member 800 is disposed on the rear cover 700 overlapping the light entrance 310b of the light guide plate 310, the light guide plate 310 is fixed to the lower surface of the light guide plate 310, The member 800 should be disposed. Since the light guide plate fixing member 800 is disposed on the lower surface of the light guide plate 310 without being overlapped with the upper substrate 130 in order to prevent the light guide plate fixing member 800 from being visible, . Further, in order to prevent the problem that the light guide plate fixing member 800 is adhered to the reflective sheet 370 to dry the reflective sheet 370, a predetermined gap is provided between the reflective sheet 370 and the light guide plate fixing member 800 Should be secured. Accordingly, when the light guide plate fixing member 800 is disposed on the light-entering / outputting portion 310b, the width of the bezel of the light-entering / outputting portion 310b is reduced by the width of the light guide plate fixing member 800 and the arrangement of the light guide plate fixing member 800 And the intervals to be secured are increased by the sum of the widths.

When the light guide plate fixing member 800 is disposed on the rear cover 700 overlapping the light entrance portion 310a of the light guide plate 310, the first width D1 may be 0.55 mm or more and 0.65 mm or less have. When the first width D1 is reduced as described above, the width of the bezel of the light-incoming / outgoing light portion 310b of the light guide plate 310 can be 1.35 mm or more and 1.65 mm or less.

Typically, the light-incident portion 310a of the light guide plate 310 is disposed at an input portion or a lower portion of the display device, and the user determines that the aesthetics of the display device is improved when the widths of the upper, left, and right bezels are reduced. Accordingly, when the light guide plate fixing member 800 is disposed on the light-incident portion 310a according to the present invention, a display device improved in user's taste can be provided.

In one example of the present application, the case where the panel guide 500 is disposed in the non-display area NDA on the side of the light entrance part 310b is shown. The lower surface and the upper surface of the guide sidewall 530 may be fixed using double-sided tapes 550 and 570.

However, the present invention is not limited to this, and the light receiving portion 310b of the light guide plate 310 according to another example may form a side edge using the adhesive resin 590. [ The adhesive resin 590 is a side wall formed at a position where the guide sidewall 530 of the panel guide 500 is disposed using a resin or a polymer resin having both fluidity and adhesiveness. In this case, a separate adhesive member may not be disposed in the return light portion 310b). In this case, it is possible to prevent the reflective sheet 370 from being dried by the other adhesive member.

In addition, the adhesive resin 590 according to another example is integrally formed with the rear cover 700 in a fluid state. The coupling force between the lower surface of the adhesive resin 590 and the rear cover 700 may be greater than the coupling force between the lower surface of the guide sidewall 530 and the rear cover 700. [ Accordingly, the adhesive resin 590 can be formed to have a smaller width than the guide side wall 530. The width of the adhesive resin 590 is the fourth width D4. The fourth width D4 may be 0.35 mm or more and 0.45 mm or less. That is, the fourth width D4 is about 0.2 mm smaller than the third width D3. Accordingly, when the adhesive resin 590 is used, the width of the bezel of the return light portion 310b can be further reduced by about 0.2 mm.

The light guide plate fixing member 800 is attached to the lower surface of the light guide plate 310. The light guide plate fixing member 800 is in contact with the lower surface of the light entrance portion 310a of the light guide plate 310. [ The light guide plate fixing member 800 fixes the lower surface of the light entrance portion 310a of the light guide plate 310 so as not to flow. The light source module 330 is disposed adjacent to the light-incident portion 310a. Accordingly, the present application can prevent the light source module 330 from flowing in the light-incident portion 310a of the adjacent light guide plate 310, thereby effectively preventing the light source module 330 from being damaged.

The light guide plate fixing member 800 may be formed of a transparent and sticky material. The light guide plate fixing member 800 may be embodied as a foam pad, a single-sided tape, or a double-sided tape. If the light guide plate fixing member 800 is a double-sided tape, the light guide plate 310 can be prevented from flowing through the structure in which the light guide plate 310 and the light guide plate fixing member 800 are in contact with each other. Accordingly, the light guide plate 310 can be fixed with a simple structure, and the possibility that the light guide plate 310 or other components are broken when the display device is assembled can be reduced.

The light guide plate fixing member 800 is inserted into the slit formed in the bottom frame 710 of the rear cover 700. [ The light guide plate fixing member 800 is inserted into the slit and directly contacts the lower surface of the light guide plate 310 adjacent to the light entrance portion 310a. The upper surface of the light guide plate fixing member 800 directly contacts the lower surface of the light guide plate 310 adjacent to the light entrance portion 310a.

Further, the light guide plate fixing member 800 is in tight contact with the side wall of the bottom frame 710 of the rear cover 700 having the slit formed therein. The side surface of the light guide plate fixing member 800 directly contacts the side wall of the bottom frame 710 exposed by the slit.

In addition, a cover member 810 may be further attached to the lower surface of the light guide plate fixing member 800 according to the present application. The cover member 810 covers the slit of the rear cover 700 into which the light guide plate fixing member 800 is inserted. The cover member 810 supports the light guide plate fixing member 800.

The cover member 810 is disposed on the lower surface of the light guide plate fixing member 800 and a part of the lower surface of the rear cover 700. The lower surface of the light guide plate fixing member 800 directly contacts the upper surface of the cover member 810. [ The cover member 810 is integrally attached to the lower surface of the light guide plate fixing member 800 and the lower surface of the rear cover 700 adjacent to the light guide plate fixing member 800 among the lower surface of the rear cover 700. [ The cover member 810 may be implemented as a single-sided tape or an adhesive member having an adhesive force to the upper surface.

When the cover member 810 is attached, the force to integrally join the lower surface of the light guide plate fixing member 800 and the lower surface of the rear cover 700 increases. Accordingly, the light guide plate fixing member 800 and the rear cover 700 can be more stably coupled using the cover member 810. [

More specifically, the force with which the light guide plate fixing member 800 and the rear cover 700 are bonded is such that both side surfaces of the light guide plate fixing member 800 and the side surfaces of the first and the bottom frames 710 and 710 are fixed to the light guide plate fixing member 800 And the upper surface of the light guide plate fixing member 800 and the lower surface of the light guide plate 310 have an adhesive force to the upper surface of the light guide plate fixing member 800.

The lower surface of the light guide plate fixing member 800 and the lower surface of the rear cover 700 are connected by the cover member 810 to support the lower portion of the light guide plate fixing member 800 when the cover member 810 is disposed It adds strength. Therefore, the light guide plate fixing member 800 can be disposed more stably between the holes of the rear cover 700. [

In addition, when the cover member 810 is attached, when the lower surface of the light guide plate fixing member 800 has an adhesive force, the adhesive surface of the light guide plate fixing member 800 can be prevented from being exposed to the outside. Accordingly, an undesired adhesive surface can be prevented from being formed on the lower surface of the display device due to the lower surface of the light guide plate fixing member 800.

The cover member 810 serves to connect the lower surface of the light guide plate fixing member 800 and the lower surface of the rear cover 700. [ However, in another example of the present application, only the light guide plate fixing member 800 may be disposed between the first and the bottom frames 710 and 710 without providing the cover member 810 as shown in Fig. In this case, the display device can be completed by attaching the housing to the lower surfaces of the first and the bottom frames 710 and 710 and the lower surface of the light guide plate fixing member 800.

As described above, the light guide plate fixing member 800 may be formed in a hole or a space provided in the rear cover 700. The light guide plate fixing member 800 can be prevented from separating from the rear cover 700 when the light guide plate fixing member 800 is provided in a hole or in a spaced space. When the light guide plate fixing member 800 is formed in a region where the bottom surface is not blocked by the rear cover 700, the light guide plate fixing member 800 may be formed as a back cover 700, 370).

Accordingly, the light guide plate fixing member 800 is not disposed in the process of assembling the light guide plate 310 or the reflection sheet 370. [ Accordingly, the light guide plate 310 or the reflective sheet 370 is caught by the light guide plate fixing member 800 in the assembling process by the light guide plate fixing member 800 or the light guide plate 310 or the reflective sheet 370 is originally disposed It is possible to prevent the problem of misalignment and attachment.

As described above, the bottom frame 710, the cover side wall 730, and the bending cover portion 750 of the rear cover 700 according to the present invention surround the light entrance portion of the light guide plate 310 and the light source module 330 .

The bottom frame 710, the cover side wall 730 and the bending cover portion 750 of the rear cover 700 are formed in a shape of a letter "C" with respect to the side surface of the display device, Since the light source module 330 is wrapped around the light source module 330, it is possible to effectively prevent the light-incident portion 310a of the light guide plate 310 and the light source module 330 from flowing. Accordingly, it is possible to prevent damage to the light-incident portion 310a and the light source module 330 of the light guide plate 310 even when there is an external impact.

The light guide plate fixing member 800 is inserted into the slit of the bottom frame 710 according to the present invention The holes or slits formed in the bottom frame 710 and the light entrance portion 310a of the light guide plate 310 Adjacent areas. The light guide plate fixing member 800 according to the present application is provided in a region adjacent to the light entrance portion 310a of the light guide plate 310. [

It is possible to prevent the light guide plate 310 and the light source module 330 from flowing more reliably than the case where the central portion of the light guide plate 310 is fixed when fixing the region adjacent to the light entrance portion 310a of the light guide plate 310. [ Accordingly, the present application can more reliably prevent the flow of the light guide plate 310 and the light source module 330.

7 is a view for explaining an arrangement structure of the rear cover 700 according to an example of the present application. 8 is a sectional view of the line III-III 'shown in FIG.

The thickness of the rear cover 700 according to the present application is the first thickness T1. The first thickness T1 is 0.18 mm or more and 0.25 mm or less. The thickness of the rear cover 700 is uniformly formed. Accordingly, the thicknesses of the bottom frame 710, the cover side wall 730, and the bending cover portion 750 are both the first thickness T1.

The thickness of the light guide plate fixing member 800 according to the present application is the second thickness T2. The second thickness T2 is 0.35 mm or more and 0.40 mm or less.

The thickness of the light guide plate fixing member 800 according to the present application is thicker than the thickness of the rear cover 700. [ The thickness of the light guide plate fixing member 800 is thicker than the thickness of the bottom frame 710, the cover side wall 730, and the bending cover portion 750.

The lower surface of the light guide plate fixing member 800 is formed on the same plane as the lower surface of the rear cover 700. [ The lower surface of the light guide plate fixing member 800 is formed on the same plane as the lower surface of the bottom frame 710 and the bottom frame 710. [

The upper surface of the light guide plate fixing member 800 is formed to be higher than the upper surface of the rear cover 700. The upper surface of the light guide plate fixing member 800 is formed on the same plane as the lower surface of the bottom frame 710 and the bottom frame 710. [

Accordingly, the light guide plate fixing member 800 can be formed to directly contact the light guide plate 310, thereby reliably preventing the light guide plate 310 from flowing.

The upper surface of the light guide plate fixing member 800 is arranged to be in direct contact with the lower surface of the light guide plate 310. In particular, the upper surface of the light guide plate fixing member 800 is arranged to be in direct contact with the lower surface adjacent to the light entrance 310a of the light guide plate 310. Accordingly, the present application can prevent the light guide plate 310 from flowing in a portion where the light entrance portion 310a of the light guide plate 310 is disposed.

When the light guide plate fixing member 800 is arranged to directly contact the lower surface adjacent to the light entrance 310a of the light guide plate 310, The binding force between the rear cover 700 and the light guide plate 310 can be enhanced more than when the rear cover 700 is directly contacted with the lower surface.

When the light guide plate fixing member 800 is disposed so as to be in direct contact with the lower surface adjacent to the light entrance 310a of the light guide plate 310, the adhesive member is provided only on the lower surface of the panel guide 500 And an adhesive member is not required to be disposed on the lower surface adjacent to the light-incoming portion 310b of the light guide plate 310. [ Thus, the manufacturing cost of the display device can be reduced. When the adhesive member is not formed on the light entering portion 310b of the light guide plate 310, adhesive force is generated in the light entrance portion 310b during the process of forming the light guide plate 310 and the reflective sheet 370, The light guide plate 310, or the panel guide 500 and the reflective sheet 370 does not occur.

As a result, the conventional rear cover 700 enables the fixing of the light-incident portion 310a of the light guide plate 310 in the structure of the light-incident portion 310a in which the light source module 330 is disposed, The structure of the light-incident portion 310a and the structure of the light-incident portion 310a of the light guide plate 310 can be simultaneously realized. Accordingly, the display apparatus according to the present invention increases the degree of freedom of bezel designing on three surfaces except for the surface adjacent to the light-incident portion 310a of the light guide plate 310, Narrow Bezel) can be implemented.

The cover member 810 has a third thickness T3. The third thickness T3 is 0.05 mm or more and 0.15 mm or less. Accordingly, the cover member 810 can be attached while preventing the bottom surface of the light guide plate 310 from being stepped, so that the coupling force of the light guide plate fixing member 800 can be enhanced.

9 to 12 are views showing a module manufacturing process of a display device according to an example of the present application.

First, a rear cover 700, a reflective sheet 370, and a light source module 330 are provided as shown in FIG. 9, and a light guide plate 310 is provided through a separate process.

The rear cover 700 is in the form of a rectangular band with a central opening 700a. The rear cover 700 is disposed at the lowermost portion of the display device. The rear cover 700 protects components inside the display device from external impact. The rear cover 700 may be formed of a material such as metal or reinforced plastic. The back cover 700 includes a bottom frame 710, a cover side wall 730, and a bending cover portion 750.

10, the light guide plate 310 is inserted into the space formed by the bottom frame 710, the cover side wall 730, and the bending cover portion 750 of the rear cover 700. As shown in FIG. The bottom frame 710, the cover side wall 730, and the bending cover portion 750 of the rear cover 700 have a "U" shaped bending structure. The light-incident portion 310a of the light guide plate 310 is inserted in the bending structure and disposed adjacent to the light source module 330. [

When inserting the light guide plate 310 into the bending structure of the rear cover 700, the bottom frame 710, the cover side wall 730, and the bending cover portion 750 of the rear cover 700 may be provided with separate adhesive members The light guide plate 310 can be easily inserted.

Third, a light guide plate fixing member 800 is formed between the light guide plate 310 and the rear cover 700, which overlaps the light entrance portion 310a of the light guide plate 310, as shown in FIG.

The light guide plate fixing member 800 may be formed of a transparent and sticky material. The light guide plate fixing member 800 may be implemented with an adhesive or an adhesive tape. The light guide plate fixing member 800 may be attached or applied through a hole or a space between the bottom frame 710 and the bottom frame 710 of the rear cover 700. [ Accordingly, the light guide plate fixing member 800 according to an example of the present application may be formed through the lower surface of the rear cover 700 after the step of inserting the light guide plate 310. [

Fourth, the cover member 810 is attached to the lower surface of the light guide plate fixing member 800 and a part of the lower surface of the rear cover 70, as shown in FIG. The cover member 810 is integrally attached to the lower surface of the light guide plate fixing member 800 and the lower surface of the rear cover 700 adjacent to the light guide plate fixing member 800.

The cover member 810 is a single-sided adhesive tape or a single-sided adhesive member having an adhesive force to the upper surface. When the cover member 810 is attached to the lower surface of the light guide plate fixing member 800 and the lower surface of the first and the bottom frames 710 and 710 adjacent to the light guide plate fixing member 800, And the lower surface of the rear cover 700 can be engaged without flowing with each other.

The both sides of the light guide plate fixing member 800 and the side surfaces of the first and the bottom frames 710 and 710 are coupled by the adhesive force of the light guide plate fixing member 800 and the lower surface of the light guide plate 310 and the light guide plate fixing member The lower surface of the light guide plate fixing member 800 and the lower surface of the rear cover 700 are attached to the cover member 810 in addition to the force by which the upper surface of the light guide plate fixing member 800 is coupled by the adhesive force of the upper surface of the light guide plate fixing member 800 The light guide plate fixing member 800 can be disposed between the holes of the rear cover 700 more stably.

The present application is capable of disposing a light guide plate fixing member on a light entrance portion of a light guide plate in a bent back cover structure. Accordingly, the display device according to the present invention has a reduced degree of freedom in bezel design on three surfaces except for the light-incoming portion, and can realize a narrow bezel having a width of 1.0 mm or more and 1.5 mm or less.

Also, in the method of manufacturing a display device according to the present application, the light guide plate is inserted in the bent back cover structure, and then the light guide plate fixing member is disposed on the lower surface of the light guide plate. Accordingly, the manufacturing method of the display device according to the present application can facilitate the insertion of the light guide plate in the module manufacturing process, thereby increasing the manufacturing efficiency of the display device.

Also, in the display device according to the present invention, the light guide plate fixing member may be disposed at the light entrance portion of the light guide plate, so that even when the rear cover receives an external impact, damage to the light source module due to the flow of the light entrance portion can be prevented.

Although the embodiments of the present application have been described in detail with reference to the accompanying drawings, it is to be understood that the present application is not necessarily limited to these embodiments, and various modifications may be made without departing from the scope of the present invention . Therefore, the embodiments disclosed in the present application are intended to illustrate rather than limit the technical spirit of the present invention, and the scope of the technical idea of the present application is not limited by these embodiments. Accordingly, it should be understood that the above-described embodiments are illustrative and non-restrictive in every respect. The scope of protection of the present application should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present application.

100: display panel 110: lower substrate
130: upper substrate 300: backlight unit
310: light guide plate 310a:
310b: Loading / unloading section 330: Light source module
350: light source housing 370: reflective sheet
500: Panel guide 530: Guide sidewall
550, 570: double-sided tape 590: adhesive resin
700: rear cover 710: bottom frame
730: cover side wall 750: bending cover part
800: light guide plate fixing member 810: cover member

Claims (12)

A backlight unit including a light guide plate having a light entrance portion and a light source module for irradiating light to the light entrance portion of the light guide plate;
A display panel disposed on the backlight unit;
A back cover for supporting the backlight unit; And
And a light guide plate fixing member disposed between the light guide plate and the rear cover overlapping the light entrance portion of the light guide plate,
Wherein the rear cover includes a slit covered by a light-incoming portion of the light guide plate,
And the light guide plate fixing member is inserted into the slit to support the light entrance portion of the light guide plate. The method according to claim 1,
Wherein the light guide plate fixing member comprises a foam pad, a cross-section tape, or a double-sided tape. The method according to claim 1,
Wherein the light guide plate fixing member is inserted into the slit and is in direct contact with a lower surface of the lower surface of the light guide plate adjacent to the light entrance portion. The method according to claim 1,
And the light guide plate fixing member is in tight contact with the side wall of the bottom frame of the rear cover on which the slit is formed. The method according to claim 1,
And a cover member for supporting the light guide plate fixing member while covering the slit of the rear cover into which the light guide plate fixing member is inserted. 6. The method of claim 5,
And the lower surface of the light guide plate fixing member is in direct contact with the upper surface of the cover member. The method according to claim 1,
Wherein the light guide plate includes an incident side surface that is parallel to the first longitudinal direction and is irradiated with light from the light source,
And the slit is parallel to the first longitudinal direction. The method according to claim 1,
The back cover
A bottom frame supporting the light guide plate and having the slit;
First to fourth cover side walls bent from an edge of the bottom frame; And
And a bending cover bent from the first cover side wall adjacent to the light entrance portion of the light guide plate and covering the slit. The method according to claim 1,
The bending cover supports one side edge of the rear surface of the display panel,
Wherein the light source module and the light entrance portion of the light guide plate are interposed between the bottom frame and the bending cover. 9. The method of claim 8,
And a panel guide supported by the second to fourth cover sidewalls and supporting a rear edge of the display panel,
The panel guide
Guide side walls covered by the second to fourth cover side walls; And
And a panel support portion supported by the upper surface of the guide sidewall and the second to fourth cover sidewalls. 11. The method of claim 10,
Wherein the panel guide is coupled to the rear edge of the display panel via a double-sided tape or is implemented as an adhesive resin. The method according to claim 1,
Wherein the thickness of the light guide plate fixing member is thicker than the thickness of the rear cover.

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