KR102530803B1 - Liquid crystal display device - Google Patents

Abstract

A liquid crystal display device according to the present invention includes a liquid crystal display panel, a plurality of optical sheets, a light guide plate, a guide panel, and an adhesive member. A plurality of optical sheets are disposed below the liquid crystal display panel. The light guide plate is disposed below the optical sheets. The guide panel has a panel support portion disposed between the liquid crystal display panel and the optical sheets to support an edge of the liquid crystal display panel from below. An adhesive member is disposed between the optical sheets and the panel support to fix the optical sheets and the panel support to each other. The optical sheets include a first optical sheet and a second optical sheet. The second optical sheet is disposed on the first optical sheet and has a second open hole exposing a portion of the first optical sheet. The adhesive member includes a first surface and a second surface. The first side is adhered to the rear side of the panel support. The second surface is adhered to a portion of the second optical sheet and adhered to a portion of the first optical sheet exposed through the second open hole.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device including a backlight unit.

Liquid crystal display devices are used as display devices in various fields such as portable computers such as notebook PCs, office automation devices, audio/video devices, indoor and outdoor advertising displays, and vehicle displays. The liquid crystal display may be divided into a reflective type, a transflective type, a transmissive type, and the like. A transflective or transmissive liquid crystal display displays an image by controlling an electric field applied to a liquid crystal layer to adjust light incident from a back light unit (BLU) according to a data voltage.

Fluorescent lamps such as Cold Cathode Fluorescent Lamps (CCFLs) have been used as light sources for backlight units, but recently, light emitting diodes (hereinafter referred to as 'LEDs') are mainly used compared to conventional fluorescent lamps. It is becoming.

In-vehicle displays are getting larger in size and the quantity installed per vehicle is also increasing. In-vehicle displays are being applied as driving support interfaces in addition to navigation. Vehicle displays are expanding their application range to instrument panels, driver warnings, and display means for driving assistance. In addition, liquid crystal displays are also being applied to Head-Up Display (HUD) devices that project vehicle speed, remaining fuel, and navigation information as graphic images on the windshield right in front of the driver. A liquid crystal display is being applied for a Rear-Seat Entertainment (RSE) system for enjoying DVD movies or games in the back seat of a vehicle.

Since the display for a vehicle requires visibility even in sunlight, high brightness is required compared to displays for other purposes, and reliability under vehicle temperature conditions and vibration conditions is required.

A liquid crystal display device includes a liquid crystal display panel and a backlight unit. The backlight unit has a structure in which a light source is disposed to face a side surface of the light guide plate and a plurality of optical sheets are disposed between the liquid crystal display panel and the light guide plate. The liquid crystal display panel and the backlight unit are assembled together with case members that fix them to be implemented as a liquid crystal module (LCM). The case member may include a guide panel, a cover bottom, a case top, and the like.

The light guide plate and the optical sheets accommodated in the case member may expand or contract or move their positions due to external factors such as temperature change, humidity change, external shock, or vibration. When the light guide plate and the optical sheets are damaged due to movement, the optical characteristics of the liquid crystal display may be changed. This deteriorates product reliability of the liquid crystal display device, such as causing poor image quality.

The present invention is a liquid crystal display capable of preventing movement of a light guide plate and optical sheets that may occur due to external factors such as temperature change, humidity change, external shock, and vibration, and preventing damage due to thermal deformation of the light guide plate. is intended to provide

A liquid crystal display device according to the present invention includes a liquid crystal display panel, a plurality of optical sheets, a light guide plate, a guide panel, and an adhesive member. A plurality of optical sheets are disposed below the liquid crystal display panel. The light guide plate is disposed below the optical sheets. The guide panel has a panel support portion disposed between the liquid crystal display panel and the optical sheets to support an edge of the liquid crystal display panel from below. An adhesive member is disposed between the optical sheets and the panel support to fix the optical sheets and the panel support to each other. The optical sheets include a first optical sheet and a second optical sheet. The second optical sheet is disposed on the first optical sheet and has a second open hole exposing a portion of the first optical sheet. The adhesive member includes a first surface and a second surface. The first side is adhered to the rear side of the panel support. The second surface is adhered to a portion of the second optical sheet and adhered to a portion of the first optical sheet exposed through the second open hole.

The first optical sheet may include a first open hole exposing a portion of the light guide plate. The second surface of the adhesive member may be adhered to a portion of the second optical sheet, adhered to a portion of the first optical sheet exposed through the second open hole, and adhered to a portion of the light guide plate exposed through the first open hole. there is.

The rear surface of the panel support may include an inclined surface having a predetermined inclination, and the first surface of the adhesive member may be adhered to the inclined surface.

At least a part of the second open hole may overlap the first open hole.

The second open hole may expose the first open hole.

The second open hole may have a larger hole area than the first open hole.

The liquid crystal display according to the present invention may further include a light source for radiating light to the light guide plate. The adhesive member may be disposed in a light input unit where a light source is located.

The second open hole may be located on a side surface of the optical sheet and may have a shape in which a portion of the side surface of the optical sheet is removed.

The second open hole may be spaced apart from the side surface of the optical sheet to the inside by a predetermined distance, and may have a shape in which a portion of the inner portion of the optical sheet penetrates.

The second open hole may have a planar shape including a circular shape, an elliptical shape, and a polygonal shape.

The present invention provides an adhesive member to prevent movement of the light guide plate and the optical sheets that may occur due to external factors such as temperature change, humidity change, external shock, and vibration, thereby preventing damage caused by the movement of the light guide plate and the optical sheets. can do. In addition, the present invention can reduce noise generated by the flow of the light guide plate and the optical sheets.

Furthermore, the present invention can prevent a problem in which the optical characteristics of the liquid crystal display device is changed due to damage to the light guide plate and the optical sheets. Accordingly, the present invention can provide a liquid crystal display device with improved product reliability by maintaining image quality.

The adhesive member according to the present invention may perform functions of preventing direct contact between the optical sheet and the panel support of the guide panel, and buffering a force applied by the panel support to the optical sheet due to external factors. Accordingly, the present invention can prevent optical sheets from being damaged due to interference with other instruments.

According to the present invention, there is no need to additionally provide a separate mechanism for preventing movement of the optical sheets and the light guide plate. Accordingly, in the present invention, since there is no need to secure a separate space for further providing the fixing mechanism, the degree of freedom in design within the same space can be improved. In addition, since an additional process for providing a fixture is not required, there is an advantage in preventing yield reduction and manufacturing cost increase due to additional processes.

1 is an exploded perspective view of a liquid crystal display according to the present invention.
FIG. 2 is a cross-sectional view of FIG. 1 taken along line I-I'.
3 is a cross-sectional view of FIG. 1 taken along line II-II'.
4 is a view for explaining the positional relationship of optical sheets and the positional relationship of open holes provided in the optical sheets.
5 is a view for explaining the positional relationship of adhesive members adhered to the panel support portion of the guide panel.
6 to 9 are views for explaining shapes and positional relationships of open holes provided in optical sheets.

The liquid crystal display manufacturing method of the present invention includes substrate cleaning of a liquid crystal display panel, substrate patterning process, alignment film formation/rubbing process, substrate bonding and liquid crystal dropping process, driving circuit mounting process, backlight unit assembly process, and liquid crystal module assembly process. Include etc.

In the substrate cleaning process, foreign substances contaminated on the surfaces of the upper and lower substrates of the liquid crystal display panel are removed with a cleaning solution. The substrate patterning process includes a process of forming and patterning various thin film materials such as signal lines including data lines and gate lines, thin film transistors (TFTs), and pixel electrodes on the lower substrate, and black matrix and color on the upper substrate. It includes a process of forming and patterning various thin film materials such as a filter and a common electrode. In the alignment film formation/rubbing process, an alignment film is applied on substrates, and the alignment film is rubbed with a rubbing cloth or subjected to photo-alignment treatment. Through these series of processes, the data lines to which the video data voltage is supplied to the lower substrate of the liquid crystal display panel, the gate lines to cross the data lines and to sequentially supply the scan signal, that is, the gate pulse, the data lines and the gate A pixel and TFT array including TFTs formed at the intersection of the lines, pixel electrodes of a liquid crystal cell connected to the TFTs, and a storage capacitor are formed. A shift register of a gate driving circuit generating a scan signal may be formed simultaneously with a pixel and a TFT array in a substrate patterning process. A black matrix, a color filter, and a common electrode are formed on the upper substrate of the liquid crystal display panel. The common electrode is formed on the upper substrate in vertical electric field driving methods such as TN (Twisted Nematic) mode and VA (Vertical Alignment) mode, and horizontal electric field driving such as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode. In this method, it is formed on the lower substrate together with the pixel electrode. A polarizing plate and a polarizing plate protective film are attached to each of the upper substrate and the lower substrate.

In the liquid crystal dropping and bonding process, sealant is drawn on one of the upper and lower substrates of the liquid crystal display panel and liquid crystal is dropped on the other substrate. When an ultraviolet light source is irradiated to the ultraviolet curable sealant through the upper or lower substrate of the liquid crystal display panel, the sealant is cured, and the upper and lower substrates are bonded with the liquid crystal layer interposed therebetween.

In the driving circuit mounting process, an integrated circuit (IC) of a data driving circuit is mounted on a lower substrate of a liquid crystal display panel using a COG (Chip On Glass) process or a COF (Chip On Film) process. As described above, the gate driving circuit may be directly formed on the lower substrate of the liquid crystal display panel, or may be attached on the lower substrate through a COF process in a driving circuit mounting process. Subsequently, in the driving circuit mounting process, an integrated circuit (IC) and a printed circuit board (PCB) are connected with a flexible printed circuit board (FPC) or a flexible flat cable (FFC).

In the assembling process of the backlight unit, wires are connected to the light source and connected to the light source driving circuit. In the assembly process of the liquid crystal module, a liquid crystal display panel mounted with a driving circuit and a backlight unit are assembled into a liquid crystal module using a guide panel, a cover bottom, a case top, and the like.

The manufacturing method of the liquid crystal display device according to an embodiment of the present invention may further include an inspection process and a repay process. The inspection process includes inspection of integrated circuits, signal wiring such as data lines and gate lines formed on the lower substrate, electrical inspection to detect defects in TFTs and pixel electrodes, electrical inspection performed after substrate bonding and liquid crystal dropping processes, and clean room It includes a lighting inspection for detecting assembly defects of optical sheets performed in , and a lighting inspection for detecting defects in the liquid crystal module by turning on the backlight unit of the liquid crystal module. The repair process repairs signal wiring defects and TFT defects determined to be repairable by the inspection process.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Like reference numbers throughout the specification indicate substantially the same elements. In the following description, if it is determined that a detailed description of a known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In describing various embodiments, the same components are representatively described at the beginning and may be omitted thereafter.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

1 is an exploded perspective view of a liquid crystal display according to the present invention. FIG. 2 is a cross-sectional view of FIG. 1 taken along line I-I'. 3 is a cross-sectional view of FIG. 1 taken along line II-II'. 4 is a view for explaining the positional relationship of optical sheets and the positional relationship of open holes provided in the optical sheets. 5 is a view for explaining the positional relationship of adhesive members adhered to the panel support portion of the guide panel.

Referring to FIGS. 1 and 2 , the liquid crystal display device of the present invention includes a liquid crystal display panel (PNL) and a backlight unit disposed under the liquid crystal display panel (PNL). As described above, the liquid crystal display panel PNL includes an upper substrate, a lower substrate, and a liquid crystal layer interposed between the upper and lower substrates. The liquid crystal layer may be implemented in at least one mode among various liquid crystal modes.

The backlight unit is provided under the liquid crystal display panel PNL, and irradiates light to the rear surface of the liquid crystal display panel PNL. The backlight unit includes a light source LS, a light guide plate LGP, and at least one optical sheet OPS. The light supplied from the light source LS to the light incident surface of the light guide plate LGP is converted into a form of the surface light source LS and emitted to the front surface of the light guide plate LGP, and the optical sheet positioned on the light guide plate LGP. While passing through (OPS), it is uniformly irradiated to the rear surface of the liquid crystal display panel (PNL).

The light source (LS) is one or more light sources (LS) of lamps such as a light emitting diode (LED), a cold cathode fluorescent lamp (CCFL), and an external electrode fluorescent lamp (EEFL). can include The light source LS radiates light to a side surface of the light guide plate LGP facing at least one side surface (or light incident surface) of the light guide plate LGP. The light guide plate (LGP) is a plate material molded from transparent plastic, for example, polymethacrylate (PMMA), and converts light in the form of a point light source (LS) or line light source (LS) into light in the form of a surface light source (LS). plays a role in converting

The optical sheets OPS include one or more prism sheets and one or more diffuser sheets to diffuse light incident from the light guide plate LGP and to substantially affect the light incident surface of the liquid crystal display panel PNL. refracts the path of light at a perpendicular angle.

The optical sheets OPS may include first to third optical sheets SH1 , SH2 , and SH3 . For example, the first optical sheet SH1 may be a diffusion sheet, the second optical sheet SH2 may be a prism sheet, and the third optical sheet SH3 may be a multilayer optical film MOF. However, it is not limited thereto. Hereinafter, for convenience of description, a case in which the optical sheets OPS OPS include first to third optical sheets SH1 , SH2 , and SH3 will be described as an example.

A reflection sheet REF may be disposed under the light guide plate LGP to increase the efficiency of the light incident on the liquid crystal display panel PNL by reflecting the light incident from the light guide plate LGP. The reflective sheet REF may be adhered to the cover bottom CB.

The liquid crystal display panel (PNL) and backlight unit are assembled together with the cover bottom (CB), guide panel (GP), and case top (CT) to form a liquid crystal module (LCM) is implemented as

The cross section of the cover bottom CB is formed in an “B” shape having at least one bent portion. The cover bottom CB includes a horizontal portion HP and a vertical portion VP. The horizontal portion HP is disposed to face the rear surface of the backlight unit and surround the rear surface of the backlight unit. The vertical portion VP extends from the horizontal portion HP and is disposed to face the side surface of the backlight unit and surround the side surface of the backlight unit. The vertical portion VP extends from one end of the horizontal portion HP in the front direction. That is, the vertical portion VP has a shape protruding from the horizontal portion HP in the front direction. A backlight unit including a light source LS, a light guide plate LGP, and at least one optical sheet OPS is accommodated in the inner space formed by the horizontal portion HP and the vertical portion VP.

The cover bottom CB may include a material having high thermal conductivity and high stiffness so as to smoothly dissipate heat from the driving circuit and the light source LS to the outside. For example, the cover bottom (CB) is made of aluminum, aluminum nitride (AlN), electro-galvanized steel (EGI), stainless (SUS), galvalume (SGLC), aluminum-plated steel (aka ALCOSTA), tin-plated steel (SPTE) It may be made of a metal plate such as In addition, such a metal plate may be coated with a high-conductivity material to promote heat transfer.

The guide panel GP is disposed below the liquid crystal display panel PNL. The guide panel GP includes a panel support part SP provided between the liquid crystal display panel PNL and the backlight unit to support an edge of the liquid crystal display panel PNL from a lower portion. The panel support part SP is provided between the liquid crystal display panel PNL and the optical sheet OPS to maintain a constant distance between the liquid crystal display panel PNL and the optical sheet OPS.

The guide panel GP may have a rectangular frame shape through which a center is penetrated. The guide panel GP may be made of a plastic-based material that can be molded into a mold, such as polycarbonate.

The liquid crystal display panel PNL and the guide panel GP may be mutually fixed by the adhesive layer LSA. The adhesive layer LSA is interposed between the edge of the liquid crystal display panel PNL and the panel support part SP of the guide panel GP. The adhesive layer LSA may perform a function of restraining and restricting mutual movement of the liquid crystal display panel PNL and the guide panel GP, and a function of buffering an applied external force. In addition, the adhesive layer LSA may function as a light blocking member by including a light blocking material to prevent light from leaking to the edge of the liquid crystal display panel PNL.

The case top CT is disposed to surround the side surfaces of the guide panel GP and the cover bottom CB. The case top may be fixed to the guide panel GP and/or the cover bottom CB by a screw or screwless fastening method. The case top CT may be made of a metal plate such as electro-galvanized steel (EGI), stainless (SUS), galvalume (SGLC), aluminum-coated steel (aka ALCOSTA), or tin-plated steel (SPTE).

Referring further to FIG. 3 , an adhesive member DT is interposed between the panel support part SP of the guide panel GP and the optical sheets OPS. The adhesive member DT may be a double side tape. The adhesive member DT is disposed between the panel support part SP of the guide panel GP and the optical sheets OPS to fix the panel support part SP and the optical sheet OPS to each other.

The adhesive member DT includes a first surface F1 and a second surface F2 that face each other. The first surface F1 of the adhesive member DT is adhered to the panel support part SP of the guide panel GP. The second surface F2 of the adhesive member DT is adhered to at least some of the optical sheets OPS, respectively. The adhesive member DT is fixed to the panel support part SP to restrict and restrict the movement of the optical sheets OPS and/or the light guide plate LGP.

The optical sheets OPS may include a first optical sheet SH1 , a second optical sheet SH2 , and a third optical sheet SH3 sequentially stacked. The first optical sheet SH1 includes a first open hole OH1 exposing one edge of the light guide plate LGP.

The second optical sheet SH2 includes a second open hole OH2 exposing one edge of the first optical sheet SH1. The second open hole OH2 exposes a portion of the first optical sheet SH1 and a portion of the light guide plate LGP exposed by the first open hole OH1.

The third optical sheet SH3 includes a third open hole OH3 exposing one edge of the second optical sheet SH2. The third open hole OH3 is formed by a part of the second optical sheet SH2, a part of the first optical sheet SH1 exposed by the second open hole OH2, and the first open hole OH1. A part of the exposed light guide plate LGP is exposed.

The second surface F2 of the adhesive member DT includes a part of the third optical sheet SH3, a part of the second optical sheet SH2 exposed by the third open hole OH3, and a second open hole ( A part of the first optical sheet SH1 exposed through OH2 and a part of light guide plate LGP exposed through first open hole OH1 are adhered. Accordingly, the adhesive member DT fixed to the panel support part SP of the guide panel GP includes the first optical sheet SH1, the second optical sheet SH2, the third optical sheet SH3, and the light guide plate. (LGP) can be constrained simultaneously.

The adhesive member DT may suppress a position change that may occur in the optical sheets OPS and/or the light guide plate LGP due to external factors such as temperature change, humidity change, external shock, and vibration. Accordingly, the present invention restricts the movement of the optical sheets OPS and/or the light guide plate LGP, thereby preventing damage caused by mutual interference between the optical sheets OPS and/or the light guide plate LGP and other instruments. It is possible to provide a liquid crystal display device having improved product reliability, such as preventing the generation of noise or noise.

The adhesive member DT has a function of preventing direct contact between the panel support part SP of the guide panel GP and the optical sheet OPS, and the panel support part SP presses the optical sheet OPS due to external factors. It can perform the function of buffering the force of Accordingly, the present invention can prevent damage to the optical sheets OPS due to interference with other instruments.

In the present invention, there is no need to additionally provide a separate mechanism for preventing the movement of the optical sheets OPS and/or the light guide plate LGP. Accordingly, in the present invention, since there is no need to secure a separate space for further providing the fixing mechanism, the degree of freedom in design within the same space can be improved. In addition, since an additional process for providing a fixture is not required, there is an advantage in preventing yield reduction and manufacturing cost increase due to additional processes.

Further referring to FIG. 5 , the light guide plate LGP and the first to third optical sheets SH1 , SH2 , and SH3 sequentially stacked through the first to third open holes OH3 have a stepped step. The guide panel GP is provided so that both the light guide plate LGP located at the lowermost layer and the third optical sheets SH3 located at the uppermost layer can be easily attached to the second surface F2 of the adhesive member DT. The panel support part SP of may include an inclined surface SL having a predetermined inclination angle θ. That is, the rear surface of the panel support part SP has an inclined surface SL corresponding to the aforementioned stepped step.

In this case, the first surface F1 of the adhesive member DT is adhered to the inclined surface SL of the panel support part SP. The inclined surface SL of the panel support part SP may be implemented by molding the panel support part SP into a corresponding shape, or by attaching a separate member having an inclination angle to the rear surface of the panel support part SP. .

Hereinafter, a liquid crystal display device according to another embodiment of the present invention will be described with reference to FIGS. 6 to 9 . 6 to 9 are views for explaining shapes and positional relationships of open holes provided in optical sheets.

Referring to FIG. 6 , the first optical sheet SH1 includes a first open hole OH1, and the second optical sheet SH2 stacked on the first optical sheet SH1 has a second open hole OH2. includes The first open hole OH1 may have a smaller hole area than the second open hole OH2 .

For example, the first open hole OH1 and the second open hole OH2 may have a rectangular shape having two long sides parallel to each other and two short sides parallel to each other. That is, the first open hole OH1 may have a first short side A1 and a first long side B1, and the second open hole OH2 may have a second short side A2 and a second long side B2. there is. In this case, the first short side A1 may have a shorter length than the second short side A2, and the first long side B1 may have a shorter length than the second long side B2.

Referring to FIG. 7 , the first optical sheet SH1 includes a first open hole OH1, and the second optical sheet SH2 stacked on the first optical sheet SH1 has a second open hole OH2. includes The first open hole OH1 overlaps at least a portion of the second open hole OH2.

For example, the first open hole OH1 may completely overlap the second open hole OH2 and be located inside the boundary of the second open hole OH2. That is, the first open hole OH1 may be completely exposed by the second open hole OH2 (FIG. 7(a)). The boundary of the second open hole OH2 is the second open hole OH2. ) means the outer edge of the second open hole OH2 that determines the shape. As another example, the first open hole OH1 may partially overlap the second open hole OH2. That is, the first open hole OH1 may be partially shifted outside the boundary of the second open hole OH2 (FIG. 7(b)). That is, according to the present invention, the sequentially stacked optical sheets ( Any configuration in which at least a portion of the optical sheets OPS located in the lower layer can all be exposed by the open hole of the optical sheet OPS located in the upper layer among the OPSs may be included.

Referring to FIG. 8 , the panel support part SP of the guide panel GP is formed to have a predetermined width. Since the area where the panel support part SP is located corresponds to an area through which light cannot pass, it is preferable that the panel support part SP is designed to have the smallest possible width.

The panel support part SP1 located in the area corresponding to the light input part may be formed to have a wider width W than the panel support part SP1 located in the other area. That is, since the light source LS is further disposed in the light input unit, unlike the light input unit, the panel support part SP1 having a relatively wide width W is provided to cover (or shield) the light source LS. There is a need.

The adhesive member DT may be adhered to the rear surface of the panel support part SP1 positioned in an area corresponding to the light input part. That is, since the adhesive member DT needs to be formed to have a sufficient area to simultaneously adhere portions of the optical sheets OPS and/or the light guide plate LGP, the adhesive member DT has a relatively wide width W. It may be preferable to attach the light incident part to the panel support part SP1.

Referring to FIG. 9 , the optical sheet SH includes an open hole OH. The open hole OH may be located at one edge of the optical sheet SH.

For example, the open hole OH may be formed at one side edge of the optical sheet SH. That is, the open hole OH may be formed by removing a portion of the side surface of the optical sheet SH. In this case, the boundary of the optical sheet SH corresponds to the boundary of the open hole OH. The boundary of the open hole OH means an outer rim that determines the shape of the open hole OH, and the boundary of the optical sheet SH means an outer rim that determines the shape of the optical sheet SH.

As another example, the open hole OH may be formed at an edge of one side of the optical sheet SH, in an area spaced apart from the side surface by a predetermined interval. The open hole OH may be formed by penetrating an inner portion of the optical sheet SH. In this case, the boundary of the open hole OH is positioned inside the boundary of the optical sheet SH.

The open hole OH may be spaced apart from the side of the optical sheet SH in the X-axis direction by a predetermined distance G1. The open hole OH may be spaced apart from the side of the optical sheet SH in the Y-axis direction by a predetermined distance G2. The open hole OH may be spaced apart from the side surface of the optical sheet SH by a predetermined distance G1 in the X-axis direction and spaced apart from the side surface of the optical sheet SH by a predetermined distance G2 in the Y-axis direction. .

The present invention provides the adhesive member DT to prevent movement of the light guide plate LGP and the optical sheets OPS, which may occur due to external factors such as temperature change, humidity change, external shock, and vibration, so that the light guide plate ( Damage caused by flow of the LGP) and the optical sheets OPS may be prevented. In addition, the present invention can reduce noise generated by the flow of the light guide plate LGP and the optical sheets OPS.

Furthermore, the present invention can prevent a problem in which the optical characteristics of the liquid crystal display device is changed due to damage to the light guide plate (LGP) and the optical sheets (OPS). Accordingly, the present invention can provide a liquid crystal display device with improved product reliability by maintaining image quality.

In the drawings, a case in which the open hole OH is rectangular is illustrated as an example, but is not limited thereto. The open hole may have various planar shapes including circular, elliptical, and polygonal shapes.

Through the above description, those skilled in the art will be able to make various changes and modifications without departing from the spirit of the present invention. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

PNL: Liquid crystal display panel GP: Guide panel
SP: Panel support OPS: Optical sheet
SH1: first optical sheet OH1: first open hole
SH2: second optical sheet OH2: second open hole
SH3: 3rd optical sheet OH3: 3rd open hole
LGP: light guide plate DT: adhesive member
LS: light source REF: reflective sheet
CB: Cover bottom HP: Horizontal part
VP: vertical part

Claims (10)

liquid crystal display panel;
a plurality of optical sheets disposed under the liquid crystal display panel;
a light guide plate disposed below the optical sheets;
a guide panel disposed between the liquid crystal display panel and the optical sheets and having a panel support portion supporting an edge of the liquid crystal display panel from below; and
an adhesive member interposed between the optical sheets and the panel supporter to mutually fix the optical sheets and the panel supporter;
The optical sheets,
a first optical sheet; and
a second optical sheet disposed on the first optical sheet and having a second open hole exposing a portion of the first optical sheet;
The adhesive member is
a first surface adhered to a rear surface of the panel support part; and
and a second surface adhered to a portion of the second optical sheet and adhered to a portion of the first optical sheet exposed through the second open hole. According to claim 1,
The first optical sheet,
A first open hole exposing a part of the light guide plate;
The second side of the adhesive member,
A liquid crystal display device bonded to a portion of the second optical sheet, adhered to a portion of the first optical sheet exposed through the second open hole, and adhered to a portion of the light guide plate exposed through the first open hole. . According to claim 1,
The rear surface of the panel support,
Including an inclined surface having a predetermined slope,
The first surface of the adhesive member,
A liquid crystal display device bonded to the inclined surface. According to claim 2,
At least a part of the second open hole,
A liquid crystal display overlapping the first open hole. According to claim 2,
The second open hole,
A liquid crystal display device exposing the first open hole. According to claim 5,
The second open hole,
A liquid crystal display device having a larger hole area than the first open hole. According to claim 1,
Further comprising a light source for irradiating light to the light guide plate,
The adhesive member is
A liquid crystal display device disposed in a light input unit where the light source is located. According to claim 1,
The second open hole,
A liquid crystal display device positioned on a side surface of the optical sheet and having a shape in which a portion of the side surface of the optical sheet is removed. According to claim 1,
The second open hole,
A liquid crystal display device spaced apart from a side surface of the optical sheet inwardly by a predetermined interval and having a shape in which a portion of the inner portion of the optical sheet penetrates. According to claim 1,
The second open hole,
A liquid crystal display device with a flat figure shape including a circle, an ellipse, and a polygon.

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