KR102082679B1 - Liquid crystal display device and method for fabricating the same - Google Patents

Abstract

The present invention relates to a liquid crystal display device capable of implementing a narrow bezel of the present invention. The disclosed invention includes: a light source unit for supplying light to a panel; A light guide plate positioned on the side of the light source unit and configured to convert light incident from the light source into planar light and propagate it toward the liquid crystal panel; An optical sheet disposed on the light guide plate; A reflective sheet disposed on a rear surface of the light guide plate; A lower cover accommodating the light guide plate, the optical sheet, and the reflective sheet; A liquid crystal panel disposed on an optical sheet on the light guide plate; And a tape pad integrally attached to a rear surface of the liquid crystal panel and an upper surface of the optical sheet and to a side surface of the lower cover.

Description

Liquid crystal display and its manufacturing method {LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR FABRICATING THE SAME}

The present invention relates to a liquid crystal display, and more particularly, a liquid crystal capable of realizing a narrow bezel product by omitting a guide panel and applying a tape pad having a double-sided adhesive portion instead of the guide panel. A display device and a method of manufacturing the same.

In general, a liquid crystal display is a device for displaying a desired image by adjusting the light transmittance of liquid crystal cells arranged in a matrix form according to image signal information. Form an image on the panel.

Liquid crystal display devices using this principle have tended to be gradually widened due to their light weight, thinness, and low power consumption. In accordance with this trend, liquid crystal displays have been used in office automation equipment, audio / video equipment, and the like. In such a liquid crystal display, the amount of light transmitted is adjusted according to a signal applied to a plurality of control switches arranged in a matrix to display a desired image on a screen.

Recently, liquid crystal displays have been widely applied to not only computer monitors and televisions but also display devices of vehicle navigator systems and portable display devices such as laptops and mobile phones.

Most of the liquid crystal display devices as described above are non-emissive type display devices that display an image by controlling the amount of light source coming from the outside, so the backlight including a separate light source for irradiating light to the liquid crystal display panel. Requires unit

A conventional liquid crystal display device having such a backlight unit will be described with reference to FIGS. 1 to 2 as follows.

1 is a schematic plan view of a liquid crystal display according to the related art, which is a plan view schematically showing a display area and a non-display area.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 and is a schematic cross-sectional view of a liquid crystal display device according to the prior art.

As shown in FIG. 1, the liquid crystal display device 1 according to the related art includes a display area 1a and a non-display area 1b defined in an edge portion of the display area 1a, that is, a bezel area. It is.

 2, the liquid crystal display device 1 according to the related art includes a liquid crystal panel 10, a backlight unit 15 for supplying light to the liquid crystal panel 10, and the liquid crystal panel 10. ) And a guide panel 40 surrounding and supporting the backlight unit 15, and a light shielding layer attached to an upper edge of the backlight unit 15 to adhere the liquid crystal panel 10 to the guide panel 40. The lower cover 70 is coupled to the tape 80 and the guide panel 40 and accommodates the backlight unit 15.

The liquid crystal panel 10 includes a color filter array substrate 10a and a TFT array substrate 10b and a liquid crystal layer (not shown) interposed therebetween, and the color filter array substrate 10a and the TFT array substrate ( Upper and lower polarizing plates 15a and 15b are attached to each outer surface of 10b).

In the liquid crystal panel 10, liquid crystal cells forming a pixel unit are arranged in a matrix form, and the liquid crystal cells form an image by adjusting light transmittance according to image signal information transmitted from a driver driving circuit (not shown).

The backlight unit 15 may include a light source unit (not shown) for generating light, a light guide plate 30 for providing light generated from the light source unit to the front surface of the liquid crystal panel 10, and a light guide plate 30. A reflective sheet 60 attached to the rear surface to reflect the light emitted backward, and a plurality of optical sheets stacked on the front surface of the light guide plate 30 to scatter light emitted from the light guide plate 30. And 20.

Although not shown, the light source unit includes a plurality of LED devices (not shown) and a substrate (not shown) on which the LED devices (not shown) are mounted.

The plurality of optical sheets 20 are for diffusing and condensing light incident from the light guide plate 30, and as shown in FIG. 1, the diffusion sheet 21, the prism sheet 23, and the protective sheet 25. ) Is provided.

On the other hand, the light guide plate 30 is located along one side of the light source unit (not shown) and is disposed on the rear surface of the liquid crystal panel 10 so that the light generated from the light source unit (not shown) is the rear surface of the liquid crystal panel 10. To the.

The light blocking tape 80 is attached to the upper edge portion of the guide panel 40 to bond the liquid crystal panel 10 to the liquid crystal panel 10 to the guide panel 40 to prevent flow. Light leakage or the like is prevented by the light shielding tape 80.

In addition, the guide panel 40 is configured in the form of a square frame surrounding the side of the light guide plate 30, and is formed of a plastic material or a metal material such as PC material. In addition, the guide panel 40 is provided with a panel seating portion 40a on the upper surface, the edge portion of the liquid crystal panel 10 is supported by the panel seating portion (40a).

The reflective sheet 60 is provided under the light guide plate 30 to reflect some of the light emitted to the bottom of the light guide plate 30 to the exit surface of the backlight unit 15 to increase the light efficiency, The amount of reflection is adjusted so that the entire light emitting surface has a uniform luminance distribution.

In addition, the lower cover 70 has a rectangular box shape having an open top, and includes a light guide plate 30, an optical sheet 20, and a reflective sheet 60 covered by the guide panel 40. By accommodating the constituent elements), the liquid crystal display device is formed.

However, in the liquid crystal display according to the related art, as shown in FIG. 2, the guide panel 40 supporting the liquid crystal panel requires a flesh thickness (T) of a predetermined thickness or more to secure injection property. Narrow Bezel implementation becomes difficult.

In addition, the liquid crystal display device according to the related art requires a guide panel to support the liquid crystal panel, and therefore, a mold for manufacturing the guide panel is required separately, thereby increasing the cost of the product.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to omit the guide panel and implement a product of a narrow bezel by applying a tape pad having double-sided adhesive parts in place of the guide panel. It is possible to provide a liquid crystal display device and a method of manufacturing the same.

Liquid crystal display device according to the invention, the light source for supplying light to the panel; A light guide plate positioned on the side of the light source unit and configured to convert light incident from the light source into planar light and propagate it toward the liquid crystal panel; An optical sheet disposed on the light guide plate; A reflective sheet disposed on a rear surface of the light guide plate; A lower cover accommodating the light guide plate, the optical sheet, and the reflective sheet; A liquid crystal panel disposed on an optical sheet on the light guide plate; And a tape pad attached between a rear surface of the liquid crystal panel and an upper surface of the optical sheet, and a side surface of the lower cover.

According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, the method including: providing a lower cover; Attaching one end of a tape pad to an outer surface of the lower cover; Accommodating a light source unit for supplying light to the panel inside the lower cover, and a light guide plate positioned at the side of the light source unit to convert light incident from the light source into planar light and proceeding toward the liquid crystal panel; Disposing an optical sheet on the light guide plate; Bending the other end of the tape pad to attach the other end of the tape pad to an upper edge portion of the optical sheet; And arranging a liquid crystal panel on the other end of the tape pad and adhering the tape pad to the tape pad.

According to the present invention, a narrow bezel can be realized by omitting a guide panel, which has previously been impossible to implement a narrow bezel, and applying a tape pad having double-sided adhesive parts instead of the guide panel. Done. In particular, by using a tape pad having a double-sided adhesive portion to adhere and support the liquid crystal panel in the state attached to the outer surface of the lower cover and the optical sheets, the function of the existing guide panel can be sufficiently performed. It is possible to realize a narrow bezel of the liquid crystal display device by the thickness of the flesh.

In addition, the liquid crystal display device and the manufacturing method thereof according to the present invention, by omitting the guide panel and applying a tape pad having a double-sided adhesive portion in place of the guide panel, the mold manufacturing cost and repetitive mold production used in the guide panel production are reduced. By becoming unnecessary, the manufacturing cost of the product is reduced.

1 is a schematic plan view of a liquid crystal display according to the related art, which is a plan view schematically showing a display area and a non-display area.
FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 and is a schematic cross-sectional view of a liquid crystal display device according to the prior art.
3 is a schematic plan view of a liquid crystal display according to an exemplary embodiment of the present invention, which schematically illustrates a display area and a non-display area.
4 is an exploded perspective view of a liquid crystal display according to the present invention.
5 is a cross-sectional view taken along the line VV of FIG. 4 and is a schematic cross-sectional view of the liquid crystal display device according to the present invention.
6 is a schematic perspective view of a tape pad of a liquid crystal display according to the present invention.
FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 6, schematically illustrating a double-sided adhesive part of the tape pad.
8A to 8E are cross-sectional views illustrating a manufacturing process of a liquid crystal display according to the present invention and schematically illustrate a first embodiment of an assembling process of a liquid crystal display.
9A to 9E are cross-sectional views illustrating a manufacturing process of a liquid crystal display device according to an exemplary embodiment of the present invention, schematically illustrating a second embodiment of an assembling process of the liquid crystal display device.
FIG. 10 is a view illustrating a case in which one side of a tape pad is attached to an inner side surface of a lower cover according to another embodiment of the liquid crystal display according to the present invention.

Hereinafter, a liquid crystal display device to which a tape pad according to the present invention is applied will be described in detail with reference to the accompanying drawings.

3 is a schematic plan view of a liquid crystal display according to an exemplary embodiment of the present invention, which schematically illustrates a display area and a non-display area.

As shown in FIG. 3, the liquid crystal display device 100 according to the present invention includes a display area 100a and a non-display area (not shown), that is, a bezel area defined at an edge portion of the display area 100a. Consists of.

4 is an exploded perspective view of a liquid crystal display according to the present invention.

5 is a cross-sectional view taken along the line VV of FIG. 4 and is a schematic cross-sectional view of the liquid crystal display device according to the present invention.

Liquid crystal display device 100 according to the present invention, as shown in Figures 4 to 5, and the liquid crystal panel 110; A light source unit 150 for supplying light to the liquid crystal panel 110; A light guide plate 130 and an optical sheet 120 disposed on a rear surface of the liquid crystal panel 10 to guide light generated from the light source unit 150 to a rear surface of the liquid crystal panel 110; A lower cover 170 in which the light guide plate 130 and the light source unit 150 are accommodated; And a tape pad interposed between an outer side surface of the lower cover 170, an upper edge portion of the optical sheet 120, and a rear edge portion of the liquid crystal panel 110 to fix and support the liquid crystal panel 110. 180).

Here, the liquid crystal panel 110 includes a color filter array substrate 110a and a TFT array substrate 110b and a liquid crystal layer (not shown) interposed therebetween. In addition, although not shown in the drawing, the liquid crystal panel 110 is attached to the front surface of the color filter array substrate 110a and the rear surface of the TFT array substrate 110b so that light passing through the liquid crystal panel 110 is cross polarized. It further comprises a front polarizer 115a and a rear polarizer 115b.

In the liquid crystal panel 110, liquid crystal cells forming a pixel unit are arranged in a matrix form, and the liquid crystal cells form an image by adjusting light transmittance according to image signal information transmitted from the driver driving circuit 113.

Although not shown in the figure, a plurality of gate lines and a plurality of data lines are formed in a matrix form on the TFT array substrate 110b, and thin film transistors (TFTs) are formed at intersections of the gate lines and the data lines. Is formed.

The signal voltage transmitted from the driver driving circuit 113 is applied between the pixel electrode and the common electrode (not shown) of the color filter array substrate 110a to be described later through the thin film transistor, and the liquid crystal between the pixel electrode and the common electrode is The light transmittance is determined according to the signal voltage.

Although not shown in the drawing, the color filter array substrate 110a includes a color filter and a common electrode which are formed by repeating red, green, and blue or cyan, magenta, and yellow on a black matrix boundary. The common electrode is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

In addition, one side of the liquid crystal panel 110 includes a driver driver 113 for driving unit pixels formed in the liquid crystal panel, and a flexible printed circuit board having one end connected to the liquid crystal panel. ) Is connected.

The backlight unit (not shown) includes a light guide plate 130 for generating light, a light guide plate 130 for providing light generated by the light source unit 150 to the front surface of the liquid crystal panel 110, and the light guide plate 130. Reflective sheet 160 to improve the efficiency of the light by reflecting the light emitted to the back is attached to the back of the, and a plurality of optical sheets stacked on the front of the light guide plate 130 to scatter the light emitted from the light guide plate 130 120.

Here, the light source unit 160 may be any one of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (LED) device. Here, the case of applying a light emitting diode device (LED device) is taken as an example.

In addition, the light source unit 150 includes an LED element 151 and a substrate 153 on which the LED element 151 is mounted.

The LED device 151 is a side viewing type device, and the LED device 151 emits light toward the light incident surface 130a of the light guide plate 130. The substrate 153 is a flexible printed circuit board having excellent bending, and a circuit (not shown) is formed therein to supply external power to the LED device 151 through the circuit.

The plurality of optical sheets 120 are for diffusing and condensing light incident from the light guide plate 130, and as shown in FIG. 3, the diffusion sheet 121, the prism sheet 123, and the protective sheet 125. ) Is provided. In some cases, it may be provided with two diffusion sheets and two prism sheets. At this time, the diffusion sheet 121 is composed of a base plate and a bead-shaped coating layer formed on the base plate.

The diffusion sheet 121 serves to diffuse the light from the light source unit 150 and supply the light to the liquid crystal panel 110. The diffusion sheet 121 may be used by overlapping two or three.

In addition, the prism sheet 123 is formed with a triangular prism-shaped prism on the upper surface in a constant arrangement.

The prism sheet 123 collects the light diffused from the diffusion sheet 121 in a direction perpendicular to the plane of the upper liquid crystal panel 110. Two pieces of the prism sheet 123 are generally used, and the micro prisms formed on the prism sheets 123 form a predetermined angle.

Accordingly, the light passing through the prism sheet 123 almost vertically travels to provide a uniform luminance distribution. The uppermost protective sheet 125 protects the prism sheet 123 that is weak to scratches.

On the other hand, although not shown in the drawing, the light guide plate 130 has a light incident surface on which light is incident from the LED element 151 and a light exit surface (not shown) extending from the light incident surface to face the liquid crystal panel 110. And a back pattern on which a dot pattern (not shown) is formed so that the light irradiated from the LED element 151 to the light incident surface (not shown) proceeds to the light emitting surface.

Accordingly, the light guide plate 130 is disposed along one side of the LED device 151 and is disposed on the rear surface of the liquid crystal panel 110 so that the light generated from the LED device 151 is rear of the liquid crystal panel 110. To the. The light guide plate 130 changes the light irradiated to the light incident surface (not shown) from the LED element 151 disposed adjacent to the light incident surface (not shown) along one side of the light guide plate 130 to planar light. It is uniformly transmitted to the liquid crystal panel 110 through the light surface. As the material of the light guide plate 130, PMMA (Polymethymethacrylate- late) having high strength and not easily deformed or broken and having good transmittance may be used.

Here, the light guide plate 130 may be provided in a wedge having a lower surface inclined and a flat upper surface, or a plate type in which both the lower surface and the upper surface are parallel to each other. In the case of a liquid crystal display device applied to a small product such as a notebook PC or a mobile phone, a wedge-shaped light guide plate 130 may be applied, and the light source unit 150 may be provided on a thick sidewall.

The reflective sheet 160 increases the light efficiency by reflecting a part of the light emitted from the lower portion of the light guide plate 130 to the light exit surface of the backlight unit (not shown), and adjusts the amount of reflection of the entire incident light to uniform the entire light exit surface It has one luminance distribution.

In addition, the lower cover 170 has a rectangular box shape with an open top, and accommodates components of a backlight unit (not shown) including the light guide plate 130, the optical sheet 120, and the reflective sheet 160.

In addition, one end of the tape pad 180 is interposed between the rear edge of the liquid crystal panel 110 and the upper edge of the optical sheet 120 to serve to fix and support the liquid crystal panel in a bonded state. The other end of the tape pad 180 is attached to the outer surface of the lower cover 170 and serves to fix and support the liquid crystal panel 110 adhered to the tape pad 180.

6 is a schematic perspective view of a tape pad of a liquid crystal display according to the present invention.

FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 6, schematically illustrating a double-sided adhesive part of the tape pad.

6 and 7, the tape pad 180 is opened in a portion of the liquid crystal display 100 that faces the display area 100a, and in a portion of the tape pad 180 that faces the non-display area 100b. , 2 adhesive parts 183 and 185 are included. In this case, the first and second adhesive parts 183 and 185 constituting the tape pad 180 are integrally formed.

In particular, the tape pad 180 may include a pad body 181, a first adhesive part 183 formed on one surface of the pad body 181, and a second adhesive part formed on a part of the other surface of the pad body 181. 183). That is, the first adhesive part 183 of the tape pad 180 is formed on the entire rear surface of the tape pad 180, and the second adhesive part 185 is formed only on one side of the top surface of the tape pad 180. have.

The first adhesive part 183 is attached to the outer surface of the lower cover 170 and the upper edge of the optical sheet 120, the second adhesive part 185 is the tape pad 180 is bending (bending) In the attached state is attached to the upper edge portion of the optical sheet 120 and the rear edge portion of the liquid crystal panel 110 corresponding thereto.

Therefore, the lower cover 170 in which the liquid crystal panel 110, the light guide plate 130, the optical sheet 120, etc. are accommodated is attached to the rear edge of the liquid crystal panel 110 and the outer surface of the lower cover 170. The liquid crystal display device 100 is combined by the tape pads 180.

As described above, the liquid crystal display according to the present invention enables the narrow bezel to be implemented by omitting the guide panel, which has previously been impossible to implement the narrow bezel, and applying a tape pad having double-sided adhesive parts instead of the guide panel. do. In particular, by using a tape pad having a double-sided adhesive portion to adhere and support the liquid crystal panel in the state attached to the outer surface of the lower cover and the optical sheets, the function of the existing guide panel can be sufficiently performed. It is possible to realize a narrow bezel of the liquid crystal display device by the thickness of the flesh.

In addition, the liquid crystal display device according to the present invention eliminates the guide panel and applies tape pads having double-sided adhesive portions instead of the guide panel, thereby eliminating the need for mold manufacturing cost and repeated mold manufacturing used for the guide panel. The manufacturing cost of is reduced.

A method of manufacturing a liquid crystal display device according to the present invention having the above configuration will be described with reference to FIGS. 8A to 8E.

8A to 8E are cross-sectional views illustrating a manufacturing process of a liquid crystal display according to the present invention and schematically illustrate a first embodiment of an assembling process of a liquid crystal display.

Referring to FIG. 8A, a portion facing the display area 100a of the liquid crystal display device 100 is opened and a portion facing the non-display area 100b includes first and second adhesive parts 183 and 185. The first and second adhesive parts 183 and 185 are prepared as a tape pad 180 integrally formed. In this case, the first adhesive part 183 of the tape pad 180 is formed on the entire rear surface of the tape pad 180, and the second adhesive part 185 is formed only on one side of the top surface of the tape pad 180. have.

Next, referring to FIG. 8B, a rectangular box shape having an open top portion includes a lower portion in which components of a backlight unit (not shown) including the light guide plate 130, the optical sheet 120, and the reflective sheet 160 are accommodated. Prepare the cover 170.

Subsequently, referring to FIG. 8C, the first adhesive part 183 formed at one end of the tape pad 180 is adhered to the outer surface of the lower cover 170.

Next, referring to FIG. 8C, a light source unit (not shown, see 150 of FIG. 4) on an inner bottom surface of the lower cover 170, a reflection sheet 160, a light guide plate 130, and a side surface of the light source unit 150. And the optical sheet 120 is sequentially stacked.

In this case, the light source unit 160 may be any one of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (LED) device. Here, the case of applying a light emitting diode device (LED device) is taken as an example.

The light source unit 150 includes an LED element 151 and a substrate 153 on which the LED element 151 is mounted. The LED element 151 is a side viewing type element. 151 emits light toward the light incident surface 130a of the light guide plate 130. The substrate 153 is a flexible printed circuit board having excellent bending, and a circuit (not shown) is formed therein to supply external power to the LED device 151 through the circuit.

In addition, the reflective sheet 160 increases the light efficiency by reflecting a part of the light emitted from the lower portion of the light guide plate 130 to the light emitting surface of the backlight unit (not shown), and adjusts the total amount of incident light to reflect the entire light emitting surface Has a uniform luminance distribution.

The light guide plate 130 is positioned along one side of the LED device 151 and is disposed on the rear surface of the liquid crystal panel 110 so that the light generated from the LED device 151 is rear surface of the liquid crystal panel 110. To the. The light guide plate 130 changes the light irradiated to the light incident surface (not shown) from the LED element 151 disposed adjacent to the light incident surface (not shown) along one side of the light guide plate 130 to planar light. It is uniformly transmitted to the liquid crystal panel 110 through the light surface.

In addition, the optical sheet 120 is for diffusing and condensing light incident from the light guide plate 130, and includes a diffusion sheet 121, a prism sheet 123, and a protective sheet 125. At this time, the light passing through the prism sheet 123 almost vertically proceeds to provide a uniform luminance distribution, and the uppermost protective sheet 125 protects the prism sheet 123 that is weak to scratches.

Subsequently, referring to FIG. 8D, after bending the other end of the tape pad 180, the first adhesive part 183 formed on the rear surface of the bent portion is bonded to the upper edge portion of the optical sheet 120. . In this case, a second adhesive part 185 is provided on an upper surface of the bent portion of the tape pad 180.

Next, referring to FIG. 8E, the second adhesive part 185 provided on the top surface of the tape pad 180 corresponding to the first adhesive part 183 adhered to the top edge of the optical sheet 120 is formed on the second adhesive part 185. The liquid crystal panel 110 is seated and adhered to each other to complete the assembly process of the liquid crystal display device 100 according to the present invention.

In this case, the liquid crystal panel 110 includes a color filter array substrate 110a and a TFT array substrate 110b and a liquid crystal layer interposed therebetween. In addition, although not shown in the drawing, the liquid crystal panel 110 is attached to the front surface of the color filter array substrate 110a and the rear surface of the TFT array substrate 110b so that light passing through the liquid crystal panel 110 is cross polarized. It further comprises a front polarizer 115a and a rear polarizer 115b.

In the liquid crystal panel 110, liquid crystal cells forming a pixel unit are arranged in a matrix form, and the liquid crystal cells adjust light transmittance according to image signal information transmitted from a driver driving circuit (not shown in FIG. 4 of FIG. 4). An image is formed.

As described above, the method of manufacturing a liquid crystal display according to the present invention implements a narrow bezel by omitting a conventional guide panel, which has been impossible to implement a narrow bezel, and applying a tape pad having double-sided adhesive parts instead of the guide panel. It becomes possible. In particular, by using a tape pad having a double-sided adhesive portion to adhere and support the liquid crystal panel in the state attached to the outer surface of the lower cover and the optical sheets, the function of the existing guide panel can be sufficiently performed. It is possible to realize a narrow bezel of the liquid crystal display device by the thickness of the flesh.

In addition, the manufacturing method of the liquid crystal display device according to the present invention eliminates the guide panel and eliminates the mold manufacturing cost and repetitive mold fabrication used for the guide panel by applying a tape pad having double-sided adhesive portions instead of the guide panel. This reduces the manufacturing cost of the product.

Meanwhile, a method of manufacturing a liquid crystal display according to another exemplary embodiment of the present invention will be described with reference to FIGS. 9A through 9D.

9A to 9E are cross-sectional views illustrating a manufacturing process of a liquid crystal display according to the present invention and schematically illustrate a second embodiment of an assembling process of the liquid crystal display.

Referring to FIG. 9A, a portion of the liquid crystal display 100 that faces the display area 100a is opened, and a portion of the liquid crystal display 100 that faces the non-display area 100b includes first and second adhesive parts 183 and 185. The first and second adhesive parts 183 and 185 are prepared as a tape pad 180 integrally formed. In this case, the first adhesive part 183 of the tape pad 180 is formed on the entire rear surface of the tape pad 180, and the second adhesive part 185 is formed only on one side of the top surface of the tape pad 180. have.

Next, referring to FIG. 9B, a liquid crystal panel 110 in which liquid crystal cells forming a pixel unit are arranged in a matrix form is prepared.

In this case, the liquid crystal panel 110 includes a color filter array substrate 110a and a TFT array substrate 110b and a liquid crystal layer interposed therebetween. In addition, although not shown in the drawing, the liquid crystal panel 110 is attached to the front surface of the color filter array substrate 110a and the rear surface of the TFT array substrate 110b so that light passing through the liquid crystal panel 110 is cross polarized. It further comprises a front polarizer 115a and a rear polarizer 115b.

The liquid crystal panel 110 forms an image by adjusting the light transmittance of the liquid crystal cells according to image signal information transmitted from a driver driving circuit (not shown in FIG. 4 of FIG. 4).

Subsequently, the second adhesive part 185 provided at the other end of the tape pad 180 is bonded to the rear edge portion of the liquid crystal panel 110.

Next, referring to FIG. 9C, the upper portion of which is a rectangular box shape having an open upper portion, the lower portion in which the components of a backlight unit (not shown) including the light guide plate 130, the optical sheet 120, and the reflective sheet 160 are accommodated. Prepare the cover 170.

Subsequently, referring to FIG. 9D, the light source unit (not shown) and the reflective sheet 160, the light guide plate 130, and the optical sheet 120 are sequentially stacked on the inner bottom surface of the lower cover 170. Let's do it.

In this case, the light source unit 160 may be any one of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (LED) device. Here, the case of applying a light emitting diode device (LED device) is taken as an example.

The light source unit 150 includes an LED element 151 and a substrate 153 on which the LED element 151 is mounted. The LED element 151 is a side viewing type element. 151 emits light toward the light incident surface 130a of the light guide plate 130. The substrate 153 is a flexible printed circuit board having excellent bending, and a circuit (not shown) is formed therein to supply external power to the LED device 151 through the circuit.

In addition, the reflective sheet 160 increases the light efficiency by reflecting a part of the light emitted from the lower portion of the light guide plate 130 to the light emitting surface of the backlight unit (not shown), and adjusts the total amount of incident light to reflect the entire light emitting surface Has a uniform luminance distribution.

The light guide plate 130 is positioned along one side of the LED device 151 and is disposed on the rear surface of the liquid crystal panel 110 so that the light generated from the LED device 151 is rear surface of the liquid crystal panel 110. To the. The light guide plate 130 changes the light irradiated to the light incident surface (not shown) from the LED element 151 disposed adjacent to the light incident surface (not shown) along one side of the light guide plate 130 to planar light. It is uniformly transmitted to the liquid crystal panel 110 through the light surface.

In addition, the optical sheet 120 is for diffusing and condensing light incident from the light guide plate 130, and includes a diffusion sheet 121, a prism sheet 123, and a protective sheet 125. At this time, the light passing through the prism sheet 123 almost vertically proceeds to provide a uniform luminance distribution, and the uppermost protective sheet 125 protects the prism sheet 123 that is weak to scratches.

Next, referring to FIG. 9E, the first adhesive part 183 provided on the other end rear surface of the tape pad 180 adhered to the rear edge portion of the liquid crystal panel 110 is the upper edge portion of the optical sheet 120. The liquid crystal panel 110 is attached to the upper surface of the optical sheet 120.

Subsequently, the first adhesive portion 183 provided on the rear surface of the tape pad 180 is bonded to the outer surface of the lower cover 170 while the one end of the tape pad 180 is bent. Will complete the assembly process.

In this case, the liquid crystal panel 110 includes a color filter array substrate 110a and a TFT array substrate 110b and a liquid crystal layer interposed therebetween. In addition, although not shown in the drawing, the liquid crystal panel 110 is attached to the front surface of the color filter array substrate 110a and the rear surface of the TFT array substrate 110b so that light passing through the liquid crystal panel 110 is cross polarized. It further comprises a front polarizer 115a and a rear polarizer 115b.

In the liquid crystal panel 110, liquid crystal cells forming a pixel unit are arranged in a matrix form, and the liquid crystal cells adjust light transmittance according to image signal information transmitted from a driver driving circuit (not shown in FIG. 4 of FIG. 4). An image is formed.

As described above, the method of manufacturing a liquid crystal display according to the present invention implements a narrow bezel by omitting a conventional guide panel, which has been impossible to implement a narrow bezel, and applying a tape pad having double-sided adhesive parts instead of the guide panel. It becomes possible. In particular, by using a tape pad having a double-sided adhesive portion to adhere and support the liquid crystal panel in the state attached to the outer surface of the lower cover and the optical sheets, the function of the existing guide panel can be sufficiently performed. It is possible to realize a narrow bezel of the liquid crystal display device by the thickness of the flesh.

In addition, the manufacturing method of the liquid crystal display according to the present invention eliminates the guide panel and replaces the guide panel with a tape pad having a double-sided adhesive portion, thereby eliminating the need for a mold manufacturing cost and a repetitive mold manufacturing used for the guide panel. This reduces the manufacturing cost of the product.

FIG. 10 is a diagram illustrating a case where one end of a tape pad is attached to an inner side of a lower cover instead of an outer side of the lower cover as in the above-described exemplary embodiment.

Referring to FIG. 10, the liquid crystal display device 200 according to the present invention may include a liquid crystal panel 210; A light source unit (not shown) for supplying light to the liquid crystal panel 210; A light guide plate 230 and an optical sheet 220 disposed on a rear surface of the liquid crystal panel 210 to guide light generated from the light source unit (not shown) to the rear surface of the liquid crystal panel 210; A lower cover 270 in which the light guide plate 230, the light source unit, and the liquid crystal panel 210 are accommodated; And a tape pad 180 interposed between an inner surface of the lower cover 270, an upper edge of the upper surface of the optical sheet 220, and a rear edge of the rear surface of the liquid crystal panel 210 to fix and support the liquid crystal panel 210. It is configured to include).

Here, the liquid crystal panel 210 includes a color filter array substrate 210a and a TFT array substrate 210b and a liquid crystal layer (not shown) interposed therebetween. In addition, although not shown in the drawing, the liquid crystal panel 210 is attached to the front surface of the color filter array substrate 210a and the rear surface of the TFT array substrate 210b so that light passing through the liquid crystal panel 210 is cross polarized. And further include a front polarizer 215a and a rear polarizer 215b.

In the liquid crystal panel 210, liquid crystal cells forming a pixel unit are arranged in a matrix form, and the liquid crystal cells form an image by adjusting light transmittance according to image signal information transmitted from the driver driving circuit 213.

Although not shown in the figure, a plurality of gate lines and a plurality of data lines are formed in a matrix form on the TFT array substrate 210b, and a thin film transistor (TFT) is formed at the intersection of the gate lines and the data lines. Is formed.

Although not shown in the drawing, the color filter array substrate 110a includes a color filter and a common electrode which are formed by repeating red, green, and blue or cyan, magenta, and yellow on a black matrix boundary. The common electrode is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

The light source unit (not shown) may be any one of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (LED) device. For example, the case of applying a light emitting diode device (LED device).

The optical sheet 220 is for diffusing and condensing light incident from the light guide plate 230, and is provided as a diffusion sheet 221, a prism sheet 223, and a protective sheet 225. In some cases, it may be provided with two diffusion sheets and two prism sheets. At this time, the diffusion sheet 221 is composed of a base plate and a bead-shaped coating layer formed on the base plate.

The diffusion sheet 221 serves to diffuse the light from the light source unit and supply the light to the liquid crystal panel 210. The diffusion sheet 221 may be used by overlapping two or three sheets.

In addition, the prism sheet 223 is formed on the upper surface of the prism of the triangular prism in a constant arrangement.

The prism sheet 223 collects light diffused from the diffusion sheet 121 in a direction perpendicular to the plane of the upper liquid crystal panel 210. Two pieces of the prism sheet 223 are generally used, and the micro prisms formed on the prism sheets 123 form a predetermined angle.

Accordingly, the light passing through the prism sheet 223 almost passes vertically to provide a uniform luminance distribution. The uppermost protective sheet 225 protects the prism sheet 223 weak to scratches.

The light guide plate 230 is positioned along one side of the light source unit and is disposed on the rear surface of the liquid crystal panel 210 to guide light generated from the light source unit to the rear surface of the liquid crystal panel 210. The light guide plate 230 changes the light irradiated to the light incident surface (not shown) from the light source unit disposed along one side of the light guide plate 230 to be adjacent to the light incident surface (not shown) to planar light. The liquid crystal panel 210 is uniformly transmitted.

The reflective sheet 260 reflects a part of the light emitted from the lower portion of the light guide plate 230 to the light exit surface of the backlight unit (not shown) to increase the light efficiency, and adjust the amount of reflection of the entire incident light to uniform the entire light exit surface. It has one luminance distribution.

In addition, the lower cover 270 has a rectangular box shape with an open top, and includes a liquid crystal panel 210, a light guide plate 230, an optical sheet 220, and a reflective sheet 260 (not shown). Components are accommodated.

In addition, one end of the tape pad 280 is interposed between the rear edge of the liquid crystal panel 210 and the upper edge of the optical sheet 220 to serve to fix and support the liquid crystal panel in a bonded state. The other end of the tape pad 280 is attached to an inner side surface of the lower cover 170 to serve to fix and support the liquid crystal panel 210 adhered to the tape pad 280.

The tape pad 280 includes a pad body 281, a first adhesive part 283 formed on one surface of the pad body 281, and a second adhesive part 283 formed on a part of the other surface of the pad body 281. It consists of. In this case, a first adhesive part 283 provided at one end of the tape pad 280 is attached to the rear edge of the liquid crystal panel 210, and the tape pad 280 is attached to an upper edge of the optical sheet 220. 2nd adhesion part 285 provided in the back surface of the end) is adhere | attached.

In addition, a first adhesive part 283 provided at the other end of the tape pad 280 is adhered to an inner surface of the lower cover 270.

In this way, the liquid crystal panel 210 is seated and adhered to the upper surface of the optical sheet 220 using the first adhesive portion 283 and the second adhesive portion 285 of the tape pad 180 as a guide panel. The assembly process of the liquid crystal display 200 according to the present invention is completed.

As described above, the liquid crystal display and the manufacturing method according to the present invention, by omitting a guide panel that has previously been impossible to implement a narrow bezel, by applying a tape pad having a double-sided adhesive portion instead of this guide panel (Narrow) Bezel) implementation is possible. In particular, by using a tape pad having a double-sided adhesive portion to adhere and support the liquid crystal panel in the state attached to the outer surface of the lower cover and the optical sheets, the function of the existing guide panel can be sufficiently performed. It is possible to realize a narrow bezel of the liquid crystal display device by the thickness of the flesh.

In addition, the liquid crystal display device and the manufacturing method thereof according to the present invention, by omitting the guide panel and applying a tape pad having a double-sided adhesive portion in place of the guide panel, the mold manufacturing cost and repetitive mold production used in the guide panel production are reduced. By becoming unnecessary, the manufacturing cost of the product is reduced.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

100: liquid crystal display 110: liquid crystal panel
110a: color filter array substrate 110b: TFT array substrate
113: drive driver 115: printed circuit board
120: optical sheet 121: diffusion sheet
123: prism sheet 125: protective sheet
130: light guide plate 140: panel guide
150: light source 151: LED element
153: substrate 160: reflective sheet
170: lower cover 180: tape pad
181: pad body 183: first adhesive portion
185: second bonding portion t: flesh thickness (bezel)

Claims (10)

A light source unit for supplying light to the liquid crystal panel;
A light guide plate positioned on the side of the light source unit and configured to convert light incident from the light source into planar light and propagate it toward the liquid crystal panel;
An optical sheet disposed on the light guide plate;
A reflective sheet disposed on a rear surface of the light guide plate;
A lower cover accommodating the light guide plate, the optical sheet, and the reflective sheet;
A liquid crystal panel disposed on the optical sheet on the light guide plate and including a display area and a non-display area surrounding the display area; And
And a tape pad integrally attached to a rear surface of the liquid crystal panel and an upper surface of the optical sheet and to a side surface of the lower cover.
The tape pad may include an opening formed to face the display area and an adhesive part to face the non-display area.
A first adhesive part is formed on an entire surface of the adhesive part of the tape pad, and is attached to an outer surface of the lower cover and an upper edge of the optical sheet, and a second adhesive part is formed on one side of the other side of the adhesive part of the tape pad. And a liquid crystal display device attached to a rear edge portion of the liquid crystal panel. delete delete delete Providing a bottom cover;
Attaching one end of the tape pad to an outer surface of the lower cover, the tape pad including an opening formed to face the display area and an adhesive part facing the non-display area surrounding the display area;
A light source unit for supplying light to the liquid crystal panel on the inner bottom surface of the lower cover, and a light guide plate and an optical sheet which are located on the side of the light source unit to convert the light incident from the light source into planar light and proceed to the liquid crystal panel side in turn. Making;
Bending the other end of the tape pad to attach the other end of the tape pad to an upper edge portion of the optical sheet; And
And arranging a liquid crystal panel on the other end of the tape pad, and adhering the liquid crystal panel to the tape pad. 6. The method of claim 5, wherein a first adhesive part is formed on one surface of the tape pad, and a second adhesive part is formed on one side of the other surface of the tape pad. The method of claim 6, wherein the first adhesive portion of the tape pad is attached to an outer surface or an inner surface of the lower cover and an upper edge portion of the optical sheet. The method of claim 6, wherein the second adhesive portion of the tape pad is attached to a rear edge portion of the liquid crystal panel. The method of claim 5, wherein the tape pad is changed in an order of being attached to a lower cover and a rear edge portion of the liquid crystal panel. 10. The method of claim 9, wherein the tape pad is attached to the bottom cover of the liquid crystal panel after being attached to the bottom edge of the liquid crystal panel.

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