Display appartus and manufacturing method of the same

Abstract

A display device according to the concept of the present invention comprises a liquid crystal panel including a front transparent substrate forming a liquid crystal layer, a rear transparent substrate, a first polarizing film attached to the rear of the rear transparent substrate, and a second polarizing film attached to the front of the front transparent substrate; a plurality of light sources disposed at the rear of the liquid crystal panel to provide light to the liquid crystal panel; a middle mold supporting the liquid crystal panel; a chassis supporting the plurality of light sources; and an adhesive member provided to bond the liquid crystal panel to the middle mold. The adhesive member includes a first surface that molecularly bonds to the rear surface of the first polarizing film, a second surface that molecularly bonds to the front surface of the middle mold, an intermediate member having a lower hardness than the rear surface of the liquid crystal panel and the front surface of the middle mold, a first molecular adhesive layer disposed on one side of the intermediate member and forming the first surface, and a second molecular adhesive layer disposed on the opposite side of the intermediate member and forming the second surface. The intermediate member is formed of an opaque material, and the thickness of the first molecular adhesive layer is provided to be smaller than the thickness of the second molecular adhesive layer.

Description

Technology Field

[0001] The present invention relates to a display device having a backlight unit. Background Technology

[0002] A display device is a type of output device that visually displays data information and images, such as characters or graphics, and includes televisions, various monitors, and various portable terminals (e.g., laptops, tablet PCs, and smartphones).

[0003] Display devices can be classified into light-emitting types that use self-emissive display panels, such as Organic Light Emitting Diodes (OLEDs), and light-receiving types that use display panels that cannot emit light themselves and must receive light from a backlight unit, such as Liquid Crystal Displays (LCDs).

[0004] Backlight units can be classified into a direct type, in which the light source is positioned at the rear of the display panel, and an edge type, in which the light source is positioned at the side of the display panel, depending on the position of the light source. A direct type backlight unit may include a light source plate on which a light-emitting diode (LED) is mounted on a flat printed circuit board.

[0005] Recent display devices achieve a bezel-less design by efficiently combining components such as backlight units and display panels, but this can lead to a problem where the assembly process of the display device components becomes complex. The problem to be solved

[0006] One aspect of the present invention provides a display device with an improved structure for coupling a liquid crystal panel to a middle mold.

[0007] One aspect of the present invention provides a display device capable of efficiently manufacturing a liquid crystal having a plurality of chip-on-films (COF) when bonding it to a middle mold. means of solving the problem

[0008] A display device according to the concept of the present invention comprises a liquid crystal panel, a plurality of light sources disposed at the rear of the liquid crystal panel to provide light to the liquid crystal panel, a middle mold supporting the liquid crystal panel, a chassis supporting the plurality of light sources, and an adhesive member provided to bond the liquid crystal panel to the middle mold, wherein the adhesive member comprises a first surface that molecularly bonds to the rear surface of the liquid crystal panel and a second surface that molecularly bonds to the front surface of the middle mold.

[0009] In addition, the adhesive member comprises an intermediate member having a lower hardness than the rear surface of the liquid crystal panel and the front surface of the middle mold, a first molecular adhesive layer disposed on one side of the intermediate member and forming the first surface, and a second molecular adhesive layer disposed on the opposite side of the intermediate member and forming the second surface.

[0010] In addition, the above intermediate member is formed of rubber or silicone material.

[0011] In addition, the first molecular adhesive layer is arranged to be molecularly bonded to a glass material or a polymer material.

[0012] In addition, the second molecular adhesive layer is arranged to be molecularly bonded with a synthetic resin material.

[0013] In addition, the middle mold includes a frame portion forming four edges of the middle mold and an adhesive portion formed at the front of the frame portion to which the liquid crystal panel is adhered, and the adhesive member is disposed on the front of the adhesive portion.

[0014] In addition, the liquid crystal panel includes a front transparent substrate and a rear transparent substrate forming a liquid crystal layer, a first polarizing film attached to the rear of the rear transparent substrate, and a second polarizing film attached to the front of the front transparent substrate.

[0015] In addition, the first surface of the adhesive member is arranged to be molecularly bonded to the rear transparent substrate.

[0016] In addition, the first surface of the adhesive member is arranged to be molecularly bonded with the rear transparent substrate and the first polarizing film.

[0017] Additionally, the liquid crystal panel includes a Chip on Film (COF) that transmits image data to the liquid crystal panel so that an image is displayed on the liquid crystal panel, and the COF includes a flexible film electrically connected to the liquid crystal panel and a chip adhered to the flexible film, and the middle mold includes a receiving groove provided to receive the chip when the flexible film is extended and positioned to the rear of the liquid crystal panel.

[0018] In addition, the COF extends from the lower edge of the liquid crystal panel.

[0019] In addition, the COF extends from at least two of the four sides of the liquid crystal panel.

[0020] In addition, the above intermediate member is formed of an opaque material.

[0021] In addition, the above frame part is combined with the above chassis.

[0022] A display device according to the concept of the present invention comprises a liquid crystal panel, a plurality of light sources disposed at the rear of the liquid crystal panel to provide light to the liquid crystal panel, a middle mold supporting the liquid crystal panel, a chassis supporting the plurality of light sources, and an adhesive member provided to adhere the liquid crystal panel to the middle mold, wherein the adhesive member comprises an intermediate member having a lower hardness than the rear surface of the liquid crystal panel and the front surface of the middle mold, a first molecular adhesive layer disposed on one side of the intermediate member and molecularly adhesive to the rear surface of the liquid crystal panel, and a second molecular adhesive layer disposed on the opposite side of the intermediate member and molecularly adhesive to the front surface of the middle mold.

[0023] In addition, the above intermediate member is formed of rubber or silicone material.

[0024] In addition, the first molecular adhesive layer is arranged to be molecularly bonded to a glass material or a polymer material.

[0025] In addition, the second molecular adhesive layer is arranged to be molecularly bonded with a synthetic resin material.

[0026] In addition, the middle mold includes a frame portion forming four edges of the middle mold and an adhesive portion formed at the front of the frame portion, and the adhesive member is disposed at the front of the adhesive portion.

[0027] Additionally, the liquid crystal panel includes a Chip on Film (COF) that transmits image data to the liquid crystal panel so that an image is displayed on the liquid crystal panel, and the COF includes a flexible film electrically connected to the liquid crystal panel and a chip adhered to the flexible film, and the middle mold includes a receiving groove provided to receive the chip when the flexible film is extended and positioned to the rear of the liquid crystal panel. Effects of the invention

[0028] According to an embodiment of the present disclosure, an adhesive member for bonding a liquid crystal panel to a middle mold is provided to molecularly bond with the liquid crystal panel and the middle mold, respectively, thereby simplifying the bonding process between the middle mold and the liquid crystal panel and minimizing the bonding area between the liquid crystal panel and the middle mold, making it possible to realize a bezel-less display device. Brief explanation of the drawing

[0029] FIG. 1 is a drawing showing the exterior of a display device according to one embodiment of the present invention. FIG. 2 is a disassembled view of a display device according to one embodiment of the present invention. FIG. 3 is a side cross-sectional view of the liquid crystal panel of the display device shown in FIG. 2. FIG. 4 is a side cross-sectional view of a part of a display device according to one embodiment of the present invention. FIG. 5 is an enlarged side cross-sectional view of a part of a display device according to one embodiment of the present invention. FIG. 6 is an enlarged side cross-sectional view of a part of a display device according to another embodiment of the present invention. FIG. 7 is a side cross-sectional view of another part of a display device according to one embodiment of the present invention. FIG. 8 is a disassembled view of a display device according to another embodiment of the present invention. FIG. 9 is a side cross-sectional view of a part of a display device according to another embodiment of the present invention. Specific details for implementing the invention

[0030] The embodiments described in this specification are merely the most preferred embodiments of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents or modifications that can replace them at the time of filing this application are also included within the scope of the rights of the present invention.

[0031] Singular expressions used in the description may include plural expressions unless the context clearly indicates otherwise. In the drawings, the shapes and sizes of elements may be exaggerated to provide a clearer description.

[0032] In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0033] The directions of "front," "rear," "upper," "lower," "left," and "right" shall be referred to uniformly throughout the specification based on the directions shown in the attached drawing Fig. 1. Fig. 1 shows mutually perpendicular X-axis, Y-axis, and Z-axis directions, where the X-axis direction refers to the long side direction of the liquid crystal panel (20), the Y-axis direction refers to the short side direction of the liquid crystal panel (20), and the Z-axis direction refers to the front-back direction.

[0034] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0035] FIG. 1 is a drawing showing the exterior of a display device according to one embodiment of the present invention. FIG. 2 is a drawing showing an exploded view of a display device according to one embodiment of the present invention. FIG. 3 is a side cross-sectional view of a liquid crystal panel of the display device shown in FIG. 2. FIG. 4 is a side cross-sectional view of a part of a display device according to one embodiment of the present invention. FIG. 5 is an enlarged side cross-sectional view of a part of a display device according to one embodiment of the present invention. FIG. 6 is an enlarged side cross-sectional view of a part of a display device according to another embodiment of the present invention.

[0036] Referring to FIGS. 1 to 5, the display device (1) may include a liquid crystal panel (20) for displaying an image, a backlight unit disposed behind the liquid crystal panel (20) to provide light to the liquid crystal panel (20), and a chassis assembly supporting the backlight unit and the liquid crystal panel (20).

[0037] The chassis assembly may include a rear chassis (40) provided to support a backlight unit, a front chassis (20) provided in front of the rear chassis (40) to support the front of the liquid crystal panel (20), and a middle mold (30) coupled between the front chassis (10) and the rear chassis (40) and supporting the liquid crystal panel (20).

[0038] A liquid crystal panel (20) is provided in front of a backlight unit and blocks or passes light emitted from the backlight unit to form an image.

[0039] The front surface of the liquid crystal panel (20) can display an image of the display device (1) and form a plurality of pixels (P). The liquid crystal panel (20) can independently block or allow light from the backlight unit to pass through each of the plurality of pixels (P), and the light passed through by the plurality of pixels (P) can form an image.

[0040] The liquid crystal panel (20) may include a first polarizing film (21), a first transparent substrate (22), a pixel electrode (23), a thin film transistor (24), a liquid crystal layer (L), a common electrode (26), a color filter (27), a second transparent substrate (28), and a second polarizing film (29).

[0041] The first transparent substrate (22) and the second transparent substrate (28) can fix and support a pixel electrode (23), a thin-film transistor (24), a liquid crystal layer (L), a common electrode (26), and a color filter (27). These first and second transparent substrates (22, 28) may be composed of reinforced glass or a transparent resin.

[0042] A first polarizing film (21) and a second polarizing film (29) are provided on the outer side of the first and second transparent substrates (22, 28).

[0043] The first polarizing film (21) and the second polarizing film (29) can each allow specific light to pass through and block other light. For example, the first polarizing film (21) allows light having a magnetic field vibrating in a first direction to pass through and blocks other light. Additionally, the second polarizing film (29) allows light having a magnetic field vibrating in a second direction to pass through and blocks other light. At this time, the first direction and the second direction may be orthogonal to each other. Accordingly, the polarization direction of the light passed by the first polarizing film (21) and the vibration direction of the light passed by the second polarizing film (29) are orthogonal to each other. As a result, light generally cannot pass through the first polarizing film (21) and the second polarizing film (29) simultaneously.

[0044] A color filter (27) may be provided on the inner side of the second transparent substrate (28).

[0045] The color filter (27) may include, for example, a red filter (27R) that passes red light, a green filter (27G) that passes green light, and a blue filter (27G) that passes blue light, and the red filter (27R), the green filter (27G), and the blue filter (27B) may be arranged side by side. The area where the color filter (27) is formed corresponds to the pixel (P) described above. The area where the red filter (27R) is formed corresponds to the red subpixel (P R Corresponding to ), the area where the green filter (27G) is formed is the green subpixel (P G Corresponding to ), the area where the blue filter (27B) is formed is a blue subpixel (P B It corresponds to ).

[0046] A pixel electrode (23) may be provided on the inner side of the first transparent substrate (22), and a common electrode (26) may be provided on the inner side of the second transparent substrate (28).

[0047] The pixel electrode (23) and the common electrode (26) are made of an electrically conductive metal material and can generate an electric field to change the arrangement of liquid crystal molecules constituting the liquid crystal layer (L) described below.

[0048] The pixel electrode (23) and the common electrode (26) are made of a transparent material and can pass light incident from the outside. For example, the pixel electrode (23) and the common electrode (26) may be made of indium tin oxide (ITO), indium zinc oxide (IZO), silver nanowire (Ag nano wire), carbon nanotube (CNT), graphene, or PEDOT (3,4-ethylenedioxythiophene).

[0049] A thin film transistor (TFT) (24) is provided on the inner side of the second transparent substrate (22).

[0050] The thin-film transistor (24) can pass or block the current flowing through the pixel electrode (23). For example, depending on the turn-on (closed) or turn-off (open) of the thin-film transistor (24), an electric field can be formed or removed between the pixel electrode (23) and the common electrode (26).

[0051] The thin film transistor (24) can be made of polysilicon and can be formed by semiconductor processes such as lithography, deposition, and ion implantation.

[0052] A liquid crystal layer (L) is formed between the pixel electrode (23) and the common electrode (26), and the liquid crystal layer (L) is filled with liquid crystal molecules.

[0053] Liquid crystals represent an intermediate state between solids (crystals) and liquids. Most liquid crystal materials are organic compounds with molecular shapes resembling long, slender rods; while the arrangement of molecules appears irregular in some directions, it can take on a regular crystalline form in others. As a result, liquid crystals possess both the fluidity of liquids and the optical anisotropy of crystals (solids).

[0054] In addition, liquid crystals also exhibit optical properties depending on changes in the electric field. For example, the direction of the molecular arrangement constituting the liquid crystal can change depending on changes in the electric field. When an electric field is generated in the liquid crystal layer (L), the liquid crystal molecules of the liquid crystal layer (L) are arranged according to the direction of the electric field, and when no electric field is generated in the liquid crystal layer (L), the liquid crystal molecules may be arranged irregularly or along an alignment layer (not shown). As a result, the optical properties of the liquid crystal layer (L) may vary depending on the presence or absence of an electric field passing through the liquid crystal layer (L).

[0055] On one side of the liquid crystal panel (20), a cable (25a) for transmitting video data to the liquid crystal panel (20) and a display driver integrated circuit (DDI, 25b) (hereinafter referred to as 'driver IC') for processing digital video data and outputting an analog video signal are provided.

[0056] The cable (25a) electrically connects the control assembly / power assembly (not shown) and the driver IC (25b), and can also electrically connect the driver IC (25b) and the liquid crystal panel (20). The cable (25a) may include a flexible flat cable or a film cable, etc.

[0057] The driver IC (25b) receives image data and power from a control assembly / power assembly (not shown) through a cable (25a) and can transmit image data and driving current to a liquid crystal panel (20) through the cable (25a).

[0058] Additionally, the cable (25a) and the driver IC (25b) can be implemented as a single unit using a film cable, a chip on film (COF, 25), a tape carrier packet (TCP), etc. In other words, the driver IC (25b) can be placed on the cable (20a). However, it is not limited thereto, and the driver IC (25b) can be placed on the liquid crystal panel (20).

[0059] In the case of a display device (1) according to one embodiment of the present invention, the cable (25a) and the driver IC (25b) may be provided as a chip-on-film (COF) (25).

[0060] A control assembly (not shown) may include a control circuit that controls the operation of a liquid crystal panel (20) and a backlight unit. The control circuit may process image data received from an external content source, transmit image data to the liquid crystal panel (20), and transmit dimming data to a plurality of LED chips (110).

[0061] A power assembly (not shown) can supply power to a liquid crystal panel (20) and a backlight unit so that the backlight unit outputs light and the liquid crystal panel (20) blocks or passes the light of the backlight unit.

[0062] A control assembly / power assembly (not shown) may be implemented with a printed circuit board and various circuits mounted on the printed circuit board. For example, a power circuit may include capacitors, coils, resistor elements, processors, etc., and a power circuit board on which these are mounted. Additionally, a control circuit may include memory, a processor, and a control circuit board on which these are mounted.

[0063] A backlight unit may be positioned behind a liquid crystal panel (20) to illuminate light toward the liquid crystal panel (20). The backlight unit may include a light source plate (100) comprising a printed circuit board (90) on which light-emitting diode chips (110) are mounted, and optical members positioned on the path of light emitted from the light source plate (100).

[0064] The light source plate (100) may have a flat shape. The light source plate (100) may be placed side by side with the liquid crystal panel (10).

[0065] The light source plate (100) may include a printed circuit board (90), a plurality of LED chips (110) mounted on a surface facing the liquid crystal panel (10) of the printed circuit board (90), and a plurality of covers (170) formed to surround each of the plurality of LED chips (110) to protect the plurality of LED chips (110) and increase light efficiency.

[0066] A plurality of covers (170) may include a transparent resin that encloses a plurality of LED chips (110), and additionally may include a plurality of light conversion layers that enclose the transparent resin.

[0067] Optical components can be placed in the path of light emitted from LED chips (110) to guide the direction of light travel, reflect light, diffuse light, or improve optical properties.

[0068] The optical members may include a reflector sheet (70) that reflects light to prevent light loss, a diffuser plate (60) that evenly diffuses irregular light emitted from a light source plate (80), a quantum dot sheet (53) that changes the wavelength of light to improve color reproduction, and optical sheets (51, 52) that improve optical properties.

[0069] The reflective sheet (70) can reflect light emitted from the light source plate (80) or light emitted backward from the diffuser plate (60) to the diffuser plate (60). The reflective sheet (70) can be positioned in front of the light source plate (80) so as to be in close contact with the light source plate (80).

[0070] The reflective sheet (70) may have a plurality of openings (71) formed to correspond to a plurality of LED chips (110). Each of the plurality of LED chips (110) may be placed inside the corresponding opening (71). Each of the plurality of LED chips (110) may be placed spaced apart from the inner surface (72) of the corresponding opening (71). This prevents light emitted from the plurality of LED chips (110) from being blocked by the inner surface (72) of the opening (71) and increases the light directional angle.

[0071] The diffuser plate (60) can evenly diffuse the light emitted from the light source plate (100) and support the optical sheets (51, 52, 53). The diffuser plate (60) can evenly diffuse the light incident on its incident surface and emit it through its exit surface.

[0072] Optical sheets (51, 52, 53) may be placed in front of the diffuser plate (60) to improve the optical characteristics of the light emitted from the diffuser plate (60). The optical sheets (51, 52, 53) may include a diffuser sheet to cancel out the pattern of the diffuser plate (60), a prism sheet to concentrate light and improve brightness, a protection sheet to protect other optical sheets from external impact or foreign matter ingress, and a dual brightness enhancement film (DBEF) that transmits one polarization and reflects the other polarization to improve brightness.

[0073] The rear chassis (40) may be positioned at the rear of the backlight unit. The rear chassis (40) may have a plate shape with the edges roughly folded forward. The backlight unit may be accommodated between the rear chassis (40) and the front chassis (10).

[0074] The rear chassis (40) may include a rear base portion (41) on which a light source plate (80) is installed, and rear side portions (42) formed at the upper, lower, left, and right edges of the rear chassis (40) to be combined with the middle mold (30).

[0075] The rear chassis (40) can function to dissipate heat generated from heat-generating elements, such as multiple LED chips (110), to the outside. To this end, the rear chassis (40) can be formed from various metal materials such as aluminum or SUS, or plastic materials such as ABS.

[0076] The middle mold (30) supports the diffuser plate (60) and can reflect light emitted from the light source plate (100) to the diffuser plate (60). The middle mold (30) can maintain a gap between the diffuser plate (60) and the light source plate (100). The middle mold (30) can be coupled between the front chassis (10) and the rear chassis (40).

[0077] The middle mold (30) may be formed in a mold shape having an opening. The middle mold (30) may include a frame portion (32) to which the front chassis (10) or the rear chassis (40) is joined, a diffuser plate support portion (33) disposed inside the frame portion (32) to support the diffuser plate (60), and an adhesive portion (35) formed on the front surface of the frame portion (32) to which the liquid crystal panel (20) is adhered.

[0078] The frame portion (32) can be formed on the upper, lower, left, and right edges of the middle mold (30). The frame portion (32) can be coupled to the front chassis (10) or the rear chassis (40) through various known fitting coupling structures and separate fastening members.

[0079] The diffuser plate support (33) can support the edge portion of the incident surface of the diffuser plate (60). The diffuser plate support (33) can be formed parallel to the base portion (41) of the rear chassis (40).

[0080] Below, the adhesive portion (35) of the middle mold (30) and the adhesive member (80) for bonding the middle mold (30) and the liquid crystal panel (20) will be described in detail.

[0081] As described above, the middle mold (30) can support the liquid crystal panel (20).

[0082] In the conventional case, the liquid crystal panel (20) is attached to the middle mold (30) through a manufacturing process in which a curing adhesive is dispensed onto the front surface of the middle mold (30) and the back surface of the liquid crystal panel (20) is pressed to cure the adhesive.

[0083] At this time, during the process of dispensing the adhesive, a process of dispensing into a fine area of ​​the middle mold (30) is required, and an additional curing process for curing the adhesive is required, which may cause the process to become complicated.

[0084] In particular, UV (Ultraviolet Ray) curing adhesives have been commonly used as curing adhesives, but a separate process is required to additionally irradiate UV and cure the UV curing adhesive after dispensing it, and the process can become complicated because UV must be irradiated without any interference area between the UV supplier and the UV curing adhesive for UV irradiation.

[0085] In addition, in order for a sufficient amount of UV to be irradiated onto the UV-curing adhesive, the adhesive must be formed in layers exceeding a certain height, but there were difficulties in the process of maintaining such precision.

[0086] In particular, to achieve a bezel-less display device (1), the COF (25) of the liquid crystal panel (20) may be arranged to be positioned at the rear of the liquid crystal panel (20). At this time, since the COF (25) is positioned at the rear, there may be interference when UV is irradiated onto the UV-curing adhesive. Therefore, an additional process may occur where the COF (25) must be temporarily positioned in another area, and then positioned back at the rear of the liquid crystal panel (20) after UV is irradiated onto the UV-curing adhesive.

[0087] To solve such problems, a display device (1) according to one embodiment of the present invention may include an adhesive member (80) provided to manufacture the display device (1) by a manufacturing process that does not include the UV curing process through UV irradiation described above. More specifically, the adhesive member (80) may be disposed between a liquid crystal panel (20) and a middle mold (30) and may be bonded to the liquid crystal panel (20) and the middle mold (30) through molecular bonding with each of the liquid crystal panel (20) and the middle mold (30), thereby allowing the liquid crystal panel (20) to be easily bonded to the middle mold (30).

[0088] The molecular adhesion described here is based on direct contact between two surfaces, wherein each molecule on the surface of the adhesive composition and the adhered composition is sufficiently close to each other, preferably at a distance of less than a few nanometers, and the respective compositions are adhered to each other through an attractive force between the surfaces of the adhesive composition and the adhered composition (including bonding induced by any attractive electrical interaction force between atoms or molecules on the two surfaces).

[0089] The adhesive member (80) may include a first surface (81) that molecularly adheres to the rear surface of the liquid crystal panel (20) and a second surface (82) that molecularly adheres to the front surface of the mold (30). That is, the first surface (81) of the adhesive member (80) may be arranged to molecularly adhere to the first transparent substrate (22) of the liquid crystal panel (20) or to the first polarizing film (21) between the first transparent substrate (22). Additionally, the second surface (82) of the adhesive member (80) may be arranged to molecularly adhere to the adhesive portion (35) of the middle mold (30).

[0090] The adhesive member (80) may be placed on the front of the adhesive portion (35) of the middle mold (30). As described above, the adhesive portion (35) may be arranged to extend along the edge of the middle mold (30) by being placed in front of the frame portion (32).

[0091] The adhesive member (80) can be positioned along the edges of the four sides of the adhesive portion (35). The adhesive member (80) can be arranged so that its second surface (82) is attached to the adhesive portion (35). Afterward, the liquid crystal panel (20) can be supported by being attached to the middle mold (30) as the rear surface of the liquid crystal panel (20) and the first surface (81) of the adhesive member (80) are bonded.

[0092] The adhesive member (80) may include an intermediate member (83) having a lower hardness than the liquid crystal panel (20) and the middle mold (30), a first molecular adhesive layer (84) disposed on one side of the intermediate member (83) and forming a first surface (81), and a second molecular adhesive layer (85) disposed on the opposite side of the intermediate member (83) and forming a second surface (82).

[0093] The intermediate member (83) may be formed from a rubber-based or silicone-based material and provided to have low hardness. This is to improve molecular adhesion by enhancing the adhesion between the first and second surfaces (81, 82) and the liquid crystal panel (20) and the middle mold (30) during molecular adhesion between the liquid crystal panel (20) and the middle mold (30).

[0094] The first and second molecular adhesive layers (84, 85) can be provided as layers formed from molecular adhesive.

[0095] The first molecular adhesive layer (84) may be arranged to be molecularly bonded to a glass material forming the first transparent substrate (82) or a polymer material forming the first polarizing film (21).

[0096] In the case of the liquid crystal panel (20), as shown in FIGS. 4 and 5, the first polarizing film (21) may be provided to cover only a portion of the rear surface of the liquid crystal panel (20). That is, it may not be provided to cover the edge portion of the rear surface of the liquid crystal panel (20), and the edge portion of the rear surface of the liquid crystal panel (20) may be provided as a first transparent substrate (22). Accordingly, the adhesive member (80) may be provided to be adhered to the first transparent substrate (22).

[0097] Accordingly, the first molecular adhesive layer (84) may be provided with a molecular adhesive that is molecularly bonded to the glass material, which is the material of the first transparent substrate (82).

[0098] However, as shown in FIG. 6, the first polarizing film (21) may be provided to cover the entire rear surface of the liquid crystal panel (20).

[0099] Accordingly, the first molecular adhesive layer (84) may be provided with a molecular adhesive that is molecularly bonded to the polymer material, which is the material of the first polarizing film (21).

[0100] Additionally, although not shown in the drawing, the first polarizing film (21) may be arranged so as not to extend to the edge of the rear surface of the first transparent substrate (22) but to be positioned very close to the edge, and at this time, the first molecular adhesive layer (84) may be arranged to be simultaneously adhered to both the first transparent substrate (22) and the first polarizing film (21).

[0101] Even at this time, the first molecular adhesive layer (84) is arranged to be molecularly adhesive with both the glass material, which is the material of the first transparent substrate (82), and the polymer material, which is the material of the first polarizing film (21), so that it can be stably adhered to each composition.

[0102] That is, the first molecular adhesive layer (84) can be arranged to be molecularly bonded to both the glass material of the first transparent substrate (82) and the polymer material of the first polarizing film (21) so as to maintain adhesive strength in cases where it is bonded independently to the first transparent substrate (82), where it is bonded independently to the first polarizing film (21), or where it is bonded to both the first transparent substrate (82) and the first polarizing film (21), as described above. The second molecular adhesive layer (85) can be arranged with a molecular adhesive capable of molecular bonding to a synthetic resin material that forms a middle mold (30) as it is molecularly bonded to the middle mold (30).

[0103] The adhesive portion (35) of the middle mold (30) may include an adhesive surface (35a) on which an adhesive member (80) is disposed, facing forward in the Z-axis direction. The adhesive surface (35a) may be provided to extend along the edge of the middle mold (30) along the adhesive portion (35). The adhesive surface (35a) may be disposed on the front surface of the adhesive portion (35).

[0104] The width (w1) of the adhesive surface (35a) can be provided with a width (w2) that corresponds to the black matrix area (20a) formed on the edge of the liquid crystal panel (20).

[0105] The liquid crystal panel (20) can be divided into a display area (20b) where an image is displayed and a black matrix area (20a) formed at the edge of the display area (20b) where no image is displayed.

[0106] The display area (20b) can be configured so that an image is displayed by light emitted from the backlight unit. The black matrix area (20a) is an area where no image is displayed, and no image is displayed even when light is emitted from the backlight unit.

[0107] The width of the adhesive member (80) can be provided with a size corresponding to the width (w1) of the adhesive surface (35a). Accordingly, the width of the adhesive member (80) and the width of the black matrix area (20a) can be provided to correspond.

[0108] Accordingly, when the liquid crystal panel (20) is bonded to the adhesive member (80), the black matrix region (20a) of the liquid crystal panel (20) and the adhesive member (80) can be overlapped so as to correspond in the Z-axis direction.

[0109] In the conventional case, the liquid crystal panel (20) and the middle mold (30) are bonded by a curable adhesive, and since the curable adhesive is dispensed with a width of a predetermined size, the width of the dispensed curable adhesive can be formed to be larger than the width of the black matrix area (20a) of the liquid crystal panel (20).

[0110] More specifically, the curable adhesive can be dispensed to have a width greater than the width (w2) of the black matrix region (20a), and accordingly, the width (w1) of the adhesive surface (35a) of the adhesive part (35) can also be made larger than the width (w2) of the black matrix region (20a).

[0111] This is because the liquid crystal panel (20) is bonded to the middle mold (30) after the liquid crystal panel (20) is bonded to the adhesive surface (35a) after the liquid crystal adhesive is dispensed onto the adhesive surface (35a) of the adhesive part (35).

[0112] Accordingly, a curable adhesive and an adhesive part (35) are superimposed on the display area (20b) in the Z-axis direction, so that a portion of the light irradiated to the display area (20b) is blocked by the adhesive part (35), thereby reducing the light efficiency of the display device (1).

[0113] However, the adhesive member (80) of the display device (1) according to the present invention can be manufactured to have a width corresponding to the width (w2) of the black matrix region (20a) by being formed with a configuration including molecular adhesive layers (84, 85) and an intermediate member (83) without using a curable adhesive.

[0114] Accordingly, the width of the adhesive member (80) and the width (w1) of the adhesive surface (35a) of the display device (1) according to one embodiment of the present invention can be provided with a width corresponding to the width (w2) of the black matrix area (20a). Thus, light irradiated from the backlight unit can be efficiently irradiated onto the display area (20b) without light loss.

[0115] The adhesive member (80) may be made of an opaque material so that light is absorbed and not transmitted. This is to prevent light irradiated from the backlight unit from leaking out of the middle mold (30) through the adhesive member (80).

[0116] When using a curable adhesive as in the conventional case, the adhesive material was mostly formed as a transparent material, and at this time, light irradiated from the backlight unit could pass through the adhesive and leak out to the outside, causing a light leakage problem in the display device (1).

[0117] However, the adhesive member (80) according to one embodiment of the present invention may be provided with an opaque material to prevent light from being transmitted and leaking out. In particular, the intermediate member (83) may be provided with a rubber-based material so that light cannot be transmitted.

[0118] The arrangement of COF (25) is described in detail below.

[0119] FIG. 7 is a side cross-sectional view of another part of a display device according to one embodiment of the present invention.

[0120] As described above, in order to implement a bezel-less display device (1), the COF (25) of the liquid crystal panel (20) may be arranged to be positioned at the rear of the liquid crystal panel (20). Specifically, the COF (25) may be arranged to extend at the rear of the liquid crystal panel (20) in the Z-axis direction. As the COF (25) extends at the rear, it may be arranged to be adhered to the middle mold (30).

[0121] At this time, a problem may occur in which the driver IC (25b) mounted on the COF (25) collides with the middle mold (30) and is damaged, and a problem may occur in which the bezel may be formed thickly as the width of the display device (1) increases in the X-axis direction or Y-axis direction when the driver IC (25b) is attached to the middle mold (30) due to the thickness of the driver IC (25b).

[0122] To solve this, the middle mold (30) of the display device (1) according to one embodiment of the present invention may include a receiving groove (36) provided to accommodate the driver IC (25b) of the COF (25) inside the middle mold (30).

[0123] The receiving groove (36) can be positioned in a direction corresponding to the direction in which the COF (25) is positioned in the liquid crystal panel (20) in the X-axis direction or Y-axis direction.

[0124] According to one embodiment of the present invention, the COF (25) of the display device (1) is positioned at the bottom of the liquid crystal panel (20) in the Y-axis direction, and the receiving groove (36) can be positioned at the bottom of the middle mold (30) in the Y-axis direction.

[0125] The receiving groove (36) may be provided to extend along the X-axis from the lower part of the middle mold (30). The receiving groove (36) may be formed concavely into the interior of the middle mold (30) in the Y-axis direction.

[0126] Accordingly, when the COF (25) is positioned to extend downward, the driver IC (25b) of the COF (25) is received in the receiving groove (36) and arranged so that the driver IC (25b) is placed inside the middle mold (30), thereby preventing the bezel of the display device (1) from widening in the Y-axis direction.

[0127] Hereinafter, a display device according to another embodiment of the present invention will be described. The configuration other than the COF (25') and middle mold (30') described below is identical to that of the display device (1) according to the above embodiment of the present invention, so redundant descriptions are omitted.

[0128] FIG. 8 is an exploded view of a display device according to another embodiment of the present invention. FIG. 9 is a side cross-sectional view of a part of a display device according to another embodiment of the present invention.

[0129] As shown in FIG. 8, the COF (25') of the liquid crystal panel (20) can be arranged in pairs at the left and right ends of the liquid crystal panel (20) in the X-axis direction.

[0130] The liquid crystal panel (20) may be placed on one side of the liquid crystal panel (20) as in the display device (1) of the above-described embodiment of the present invention, but in order to improve the performance of the liquid crystal panel (20) and reduce the width of the black matrix area (20a), the COF (25') may be placed in multiple numbers on at least two or more sides of the liquid crystal panel (20).

[0131] Accordingly, the middle mold (30') may include receiving grooves (36') provided in a number corresponding to the number of COFs (25').

[0132] According to another embodiment of the present invention, the COF (25') of the display device (1) is positioned on both sides of the liquid crystal panel (20) in the X-axis direction, and the receiving groove (36') can be positioned on both sides of the middle mold (30) in the X-axis direction.

[0133] Although the technical concept of the present invention has been explained above through specific embodiments, the scope of the present invention is not limited to these embodiments. Various embodiments that can be modified or varied by those skilled in the art within the scope that does not deviate from the gist of the technical concept of the present invention as specified in the claims shall also be considered to fall within the scope of the present invention. Explanation of the symbols

[0134] 1 : Display unit 10 : Front chassis 20: LCD panel 30: Middle mold 40 : Rear chassis 80 : Adhesive member 100 : Light source plate 110 : LED chip

Claims

Claim 1 A liquid crystal panel comprising a front transparent substrate and a rear transparent substrate forming a liquid crystal layer, a first polarizing film attached to the rear of the rear transparent substrate, and a second polarizing film attached to the front of the front transparent substrate; A display device comprising: a plurality of light sources disposed at the rear of the liquid crystal panel to provide light to the liquid crystal panel; a middle mold supporting the liquid crystal panel; a chassis supporting the plurality of light sources; and an adhesive member provided to adhere the liquid crystal panel to the middle mold; wherein the adhesive member comprises a first surface that molecularly adheres to the rear surface of the first polarizing film and a second surface that molecularly adheres to the front surface of the middle mold, an intermediate member having a lower hardness than the rear surface of the liquid crystal panel and the front surface of the middle mold, a first molecular adhesive layer disposed on one side of the intermediate member and forming the first surface, and a second molecular adhesive layer disposed on the opposite side of the intermediate member and forming the second surface, wherein the intermediate member is formed of an opaque material and the thickness of the first molecular adhesive layer is provided to be smaller than the thickness of the second molecular adhesive layer. Claim 2 delete Claim 3 In claim 1, the intermediate member is a display device formed of a rubber or silicone material. Claim 4 A display device according to claim 1, wherein the first molecular adhesive layer is arranged to be molecularly bonded to a glass material or a polymer material. Claim 5 A display device according to claim 1, wherein the second molecular adhesive layer is arranged to be molecularly bonded with a synthetic resin material. Claim 6 In claim 1, the middle mold comprises a frame portion forming four edges of the middle mold and an adhesive portion formed at the front of the frame portion to which the liquid crystal panel is adhered, and the adhesive member is disposed on the front of the adhesive portion, forming a display device. Claim 7 delete Claim 8 delete Claim 9 delete Claim 10 A display device according to claim 1, wherein the liquid crystal panel includes a COF (Chip on film) that transmits image data to the liquid crystal panel so that an image is displayed on the liquid crystal panel, the COF includes a flexible film electrically connected to the liquid crystal panel and a chip adhered to the flexible film, and the middle mold includes a receiving groove provided to receive the chip when the flexible film is extended and positioned to the rear of the liquid crystal panel. Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete

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