KR20100063552A - Structure for jointing liquid crystal display device - Google Patents

Abstract

PURPOSE: A structure for assembling a liquid crystal display device is provided to stably fix a backlight unit to a liquid crystal panel by coupling a lower cover to an LED housing directly. CONSTITUTION: A light guide panel(115) is arranged near an LED(Light Emitting Diode) array(113), and a liquid crystal panel(105) is arranged at an upper portion of the light guide plate. The light guide panel displays an image by the light incident through the light guide panel. A fastening protrusion(121a) is formed at the lower surface and the lateral surface of an LED housing(121). A lower cover(123) is coupled to the fastening protrusion and the protrusion portion, and protects an LED housing.

Description

Structure for jointing liquid crystal display device

The present invention relates to a fastening structure of a liquid crystal display device, and more particularly, to assemble the backlight assembly by allowing the fastening of the LED housing directly to the structure by omitting the main support from the method of fastening with a screw. The present invention relates to a fastening structure of a liquid crystal display device capable of shortening time and reducing a volume of a product.

Recently, due to the rapid development of technology in the semiconductor industry, liquid crystal display devices are being manufactured with smaller and lighter weight and more powerful products. Cathode ray tube (CRT), which is widely used in information display devices, has many advantages in terms of performance and price, but has many disadvantages in terms of miniaturization or portability.

On the other hand, liquid crystal display devices have been attracting attention as an alternative means of overcoming the shortcomings of CRT due to the advantages of miniaturization, light weight, and low power consumption. Currently, almost all information processing devices that require display devices are required. It is installed in the situation.

Such liquid crystal displays generally apply voltages to specific molecular arrays of liquid crystals and change them to other molecular arrays. Is a display device using modulation of light by a liquid crystal cell.

Recently, various structures have been developed for slimming and lightening in order to secure the competitiveness of the product. One of them is a liquid crystal panel in which an array substrate and a color filter substrate are bonded to each other, and the backlight units, which are optical units, are stacked and inserted into a main support to protect them. Configure the mold frame structure.

A liquid crystal display according to the related art having such a configuration will be described below with reference to FIG. 1.

1 is a partially exploded perspective view schematically illustrating components assembled to a main support of a liquid crystal display according to the related art.

Referring to FIG. 1, a liquid crystal display according to the related art includes an LED array 13 including a plurality of light emitting elements 13a emitting light, and light emitted from the LED array 13 to the front of the liquid crystal panel. The light guide plate 15 for dissipating, the optical sheet 11 for dispersing and condensing the light emitted from the light guide plate 15, and the optical sheet 11 are laminated on the optical sheet 11 and irradiated from the LED array 13 The liquid crystal panel 5 which displays the image by adjusting the transmittance of light, the main support 21 for supporting and protecting the light guide plate 15 and the optical sheet 11, and the LED array 13 are bent. A lower cover 23 disposed inside the main support 21 and fastened by a screw 25a to the side of the main support 21 to protect and support the lower part of the main support 21 and the upper edge of the liquid crystal panel 5 are compressed. It is configured to include an upper case (1) coupled to the side of the lower cover (23) The.

Here, the light generated from the LED array 13 is incident through the side surface of the light guide plate 15.

In addition, although not shown in the drawing, a reflecting plate (not shown) is disposed on the rear surface of the light guide plate 15 to reflect light transmitted through the rear surface of the light guide plate 15 to the upper surface of the light guide plate to reduce the loss of light, and to the top surface of the light guide plate. Improves the uniformity of light transmitted through.

In addition, the optical sheet 11 disposed between the liquid crystal panel 5 and the light guide plate 15 may include a diffusion sheet 11a and prism sheets 11b and 11c, and a protective sheet (not shown) may be added. have.

On the other hand, the lower cover 23 is bent in the center portion, the LED array 13 consisting of a plurality of light emitting elements (LEDs) (13a) is disposed inside the bent portion, the screw 25 is provided on the side portion Screw fastening holes 23a are formed to be fastened.

In addition, a screw fastening groove 25a is formed at a side surface of the main support 21 corresponding to the screw fastening hole 23a of the lower cover 23, so that the lower cover 23 is connected to the main support 21. The assembly of the product is completed by fastening by tightening the screw 25 to the screw fastening groove 25a through the fastening hole 23a.

However, the liquid crystal display device according to the related art as described above has the following problems.

The liquid crystal display according to the related art has a partial lower cover which protects the light emitting device from external impact and reflects the light exiting from the light emitting device to the opposite side of the light guide plate to collect and return the light toward the light guide plate. The lower cover and the main support were fastened by using a screw in order to harden the fastening or strengthen the coupling force of the structure.

However, in the case of fastening the lower cover and the main support, the fastening time using the screw may take a little, the press bending occurs during the screw fastening or the torque (torque) during screw fastening is screwed out There is a possibility that the phenomenon of turning, foreign matters of the mold structure such as the main support may occur.

Therefore, the present invention has been made to solve the above problems of the prior art, the object of the present invention is to remove the main support from the way of fastening with a screw (screw) and to enable fastening the LED housing (LED housing) directly to the structure Therefore, the object of the present invention is to provide a fastening structure of the liquid crystal display device which can shorten the assembly time of the backlight assembly and reduce the volume of the product.

Fastening structure of the liquid crystal display device according to the present invention for achieving the above object is an LED array consisting of a plurality of light emitting elements for emitting light; A light guide plate disposed adjacent to the LED array to supply light incident from the LED array in one direction; A liquid crystal panel disposed on the light guide plate and displaying an image by light incident through the light guide plate; An LED housing having the LED array mounted therein and having fastening protrusions and protrusions formed on lower and side surfaces thereof, respectively; A lower cover coupled to the fastening protrusions and protrusions of the LED housing to support and protect the LED housing; And an upper case protecting the lower cover and the LED housing.

According to the fastening structure of the liquid crystal display device according to the present invention has the following effects.

The fastening structure of the liquid crystal display device according to the present invention is fixed to the backlight unit and the liquid crystal panel as the lower cover is directly coupled to the LED housing without the existing main support, and not only more firmly fixed, but also the liquid crystal panel and the backlight unit after the fixing. This has the advantage of not flowing.

In addition, the fastening structure of the liquid crystal display device of the present invention is coupled to each other by the engaging projection formed in the guide portion of the lower cover and the projection of the LED housing, thereby preventing the up, down, left and right flow.

In addition, the present invention can shorten the assembly time using a conventional screw can shorten the overall backlight assembly process time.

In addition, the screw is not able to be used because the torque is increased when the screw is fastened in the past, but the present invention does not use such a screw to fasten the fastening protrusion of the LED housing to the fastening hole of the lower cover. Assembly is possible to improve product quality problems. In particular, in the thin model, it is possible to minimize the risk of bending stress generated when screwing.

In addition, the present invention can fundamentally prevent the problem of foreign matter generation of the mold (mold) generated during the existing screw fastening.

Furthermore, the present invention can reduce the thickness of the product and lower the unit cost because the liquid crystal panel can be guided and fixed by the guide part of the lower cover without using the main support used in the related art.

Hereinafter, a fastening structure of a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic exploded perspective view illustrating components of a liquid crystal display according to the present invention.

2, a liquid crystal display according to the present invention includes a liquid crystal panel 105 in which pixels are arranged in a matrix form; A gate driver (not shown) and a data driver (not shown) connected to side surfaces of the liquid crystal panel 105, respectively; It is composed of a backlight unit (not shown) disposed on the back of the liquid crystal panel 105.

The liquid crystal panel 105 includes a thin film transistor array substrate and a color filter substrate so as to maintain a uniform cell gap therebetween, and a liquid crystal layer formed at intervals between the color filter substrate and the thin film transistor array substrate.

A common electrode and a pixel electrode are formed in the liquid crystal panel where the thin film transistor array substrate and the color filter substrate are bonded to apply an electric field to the liquid crystal layer.

Therefore, when the voltage of the data signal applied to the pixel electrode is controlled while the voltage is applied to the common electrode, the liquid crystal of the liquid crystal layer is rotated by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode. For example, characters or images are displayed by transmitting or blocking light for each pixel.

In addition, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching element such as a thin film transistor is separately provided in the pixels.

The gate driver and the data driver are coupled to the liquid crystal panel 105 in various forms to provide scan signals and image information to gate lines and data lines formed in the liquid crystal panel 105. By supplying, the pixels of the liquid crystal panel 105 are driven.

The backlight unit (not shown) includes a light guide plate 115 disposed on the rear surface of the liquid crystal panel 105; An LED array 113 and an LED housing 121 disposed on one side or both sides of the light guide plate 115; The light guide plate 115 includes a reflective plate 117 disposed on a rear surface of the light guide plate 115, and an optical sheet 111 is disposed between the liquid crystal panel 105 and the light guide plate 115.

The light generated from the plurality of light emitting elements 113a of the LED array 113 is incident into the light guide plate through the side surface of the light guide plate 115 formed of a transparent material.

The reflective plate 117 disposed on the rear surface of the light guide plate 115 reflects the light transmitted to the rear surface of the light guide plate 115 to the top surface of the light guide plate 115 to reduce the loss of light and to transmit the light to the top surface of the light guide plate 115. Improves the uniformity of the light being

Therefore, the light guide plate 115 transmits the light generated by the LED array 113 together with the reflecting plate 117 to the upper surface.

In addition, a diffusion sheet 111a and prism sheets 111b and 111c may be applied to the optical sheet 111 disposed between the liquid crystal panel 105 and the light guide plate 115, and a protective sheet (not shown) may be added. Can be.

The diffusion sheet 111a disperses the light incident from the light guide plate 115 to prevent the light from being partially concentrated to prevent staining of an image displayed on the liquid crystal panel 105, and the light guide plate 115. The angle of light incident from the light is refracted vertically.

In addition, the prism sheets 111b and 111c collect light incident from the diffusion sheet 111a to be uniformly distributed on the entire surface of the liquid crystal panel 105.

In addition, the protective sheet (not shown) protects the optical sheet 111 sensitive to dust or scratches and prevents the flow of the optical sheet 111 when the backlight unit (not shown) is transported, and the prism sheet 111b. , 111c) may have a function of diffusing light incident from the light source, so that light may be more uniformly distributed.

On the other hand, the backlight unit (not shown) was applied to the edge (edge) method provided with one LED array 113 consisting of a plurality of light emitting elements 113a on one side of the light guide plate 115, the light guide plate Edge method provided with two LED arrays on both sides of the 115 may be applied.

In addition, the liquid crystal panel 105 and the backlight unit (not shown) are stacked on the lower cover 123, and the stacked liquid crystal panel 105 and the backlight unit (not shown) are disposed on the lower surface of the lower cover 123. It is supported by the formed fastening hole 123a and the guide part 123b which protruded in the side surface. At this time, the fastening protrusion 121a formed on the bottom surface of the LED housing 121 is inserted into and fastened to the fastening hole 123a formed on the bottom surface of the lower cover 123, and a guide protruding from the side surface of the lower cover 123. A protrusion 121b extending to the side of the LED housing 121 is caught and fixed to the locking jaw 124 formed in the inner portion 123b.

The upper edge of the liquid crystal panel 105 is compressed by the upper case 101, and the upper case 101 is coupled to the lower cover 123 by screws or other fastening means.

On the other hand, the gate driver and the data driver are provided with a gate PCB (not shown) and a data PCB (not shown), respectively, each PCB (not shown), various signals for driving the pixels of the liquid crystal panel 105 Integrated circuit chips for generating the signals and wirings for transmitting the electrical signals are mounted.

A coupling structure of the liquid crystal display device having the above configuration will be described with reference to FIG. 3.

3 is a schematic cross-sectional view illustrating components of a liquid crystal display according to the present invention.

4 is a perspective view showing a coupling structure of the LED housing lower surface and the lower cover in the fastening structure of the liquid crystal display device according to the present invention.

5 is a perspective view showing a coupling structure between the LED housing side portion and the side portion of the lower cover in the fastening structure of the LCD according to the present invention.

Referring to FIG. 3, the liquid crystal display according to the present invention has a structure in which a liquid crystal panel 105, a backlight unit (not shown), a lower cover 123, and an upper case 101 are combined.

Here, the LED housing 121 having a reflecting plate 117, a light guide plate 115 and an optical sheet 111, and an LED array 113 composed of a plurality of light emitting elements 113a on the lower cover 123. The backlight unit (not shown) which consists of etc. is mounted.

The light blocking tape 114 is attached to the LED housing 121, and the liquid crystal panel 105 is attached to the LED housing 121 by the light blocking tape 114.

In addition, the fastening protrusion 121a formed on the lower surface of the LED housing 121 is inserted through the fastening hole 123a formed in the lower cover 123 so that the LED housing 121 is fixed on the lower cover 123. It does not flow left and right due to external shock or vibration.

In addition, the protrusion 121b formed on the side of the LED housing 121 is fixed to the guide 123b formed on the side of the lower cover 123 by being caught by the locking jaw 124 on the inside, thereby fixing the LED housing 121 to the inside of the LED housing 121. It will not flow up and down.

Therefore, the lower cover 123 to which the LED housing 121 is coupled is assembled with the upper case 101 to protect the backlight unit (not shown) together with the liquid crystal panel 105.

As described above, the structure in which the LED housing is coupled to the lower cover will be described in detail with reference to FIGS. 4 and 5 as follows.

As shown in FIG. 4, the lower surface of the LED housing 121 is coupled to the lower cover 121, and the lower cover (ie, corresponds to the fastening protrusion 121a of the LED housing 121). The fastening holes 123a are formed on the 123 at regular intervals.

The fastening holes 123a formed on the lower cover 123 are formed at regular intervals along one edge edge portion corresponding to the installation area of the LED housing 121, that is, a plurality of fastening holes formed in the LED housing 121. It is formed to correspond to the protrusion 121a, when the light guide plate 115 and the reflecting plate 117 is disposed, the reflecting plate 117 extends to a line where the fastening hole 123a is formed.

In addition, as illustrated in FIG. 5, the side portion of the LED housing 121 is coupled to the side portion of the lower cover 123, and the protrusion 121b formed on the side surface of the LED housing 121 is illustrated. The upper part of the side surface adjacent to the) is caught by the locking jaw 124 provided inside the guide portion 121b formed on the side of the lower cover 121 so that there is no up and down flow. In this case, since the lower side of the guide portion 123b has a thickness thinner than that of the upper side, the locking jaw 124 formed in the guide portion 123b of the lower cover 123 has the thickness of the LED housing ( The protrusion 121b of 121 is fixed by the locking jaw 124 while being inserted into the guide part 123b so that there is no vertical flow.

As described above, in the present invention, since the lower cover 123 is directly coupled to the LED housing 121 without fixing the main support, the backlight unit and the liquid crystal panel are fixed. The advantage is that the unit does not flow.

In addition, the locking jaw 124 formed in the guide portion of the lower cover 123 and the protrusion 121b of the LED housing 121 are mutually coupled, thereby preventing up, down, left and right flow.

Therefore, the present invention can shorten the assembly time using a conventional screw can shorten the overall backlight assembly process time.

In addition, in the past, when the torque (torque) value when screwing the screw is screwed, the screw can not be used, but the present invention can be used by fastening the fastening projection of the LED housing to the fastening hole of the lower cover without using such a screw Assembly is possible to improve product quality problems. In particular, in the thin model, it is possible to minimize the risk of bending stress generated when screwing.

In addition, it is possible to fundamentally prevent the problem of mold foreign matters generated during the conventional screw fastening.

In addition, the present invention can reduce the thickness of the product and lower the product cost because it can guide and support the liquid crystal panel by the guide portion of the lower cover without using the main support that was used previously.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

1 is a partially exploded perspective view schematically illustrating components assembled to a main support of a liquid crystal display according to the related art.

2 is a schematic exploded perspective view showing components of a liquid crystal display according to the present invention.

3 is a schematic cross-sectional view illustrating components of a liquid crystal display according to the present invention.

4 is a perspective view showing a coupling structure of the LED housing lower surface and the lower cover in the fastening structure of the liquid crystal display device according to the present invention.

5 is a perspective view showing a coupling structure between the LED housing side portion and the side portion of the lower cover in the fastening structure of the LCD according to the present invention.

*** Explanation of symbols on main parts of drawing ***

101: upper case 105: liquid crystal panel

111: optical sheet 111a: diffusion sheet

111b, 111c: prism sheet 113: LED array

113a: Light emitting device 114: Light shielding tape

115: light guide plate 117: reflecting plate 121: LED housing 121a: fastening protrusion

121b: protrusion 123: lower cover

123a: fastening hole 123b: guide part

Claims (5)

LED array consisting of a plurality of light emitting elements for emitting light; A light guide plate disposed adjacent to the LED array to supply light incident from the LED array in one direction; A liquid crystal panel disposed on the light guide plate and displaying an image by light incident through the light guide plate; An LED housing having the LED array mounted therein and having fastening protrusions and protrusions formed on lower and side surfaces thereof, respectively; A lower cover coupled to the fastening protrusions and protrusions of the LED housing to support and protect the LED housing; And Fastening structure of the liquid crystal display device comprising a; the upper cover for protecting the lower cover and the LED housing. The fastening structure of a liquid crystal display device according to claim 1, wherein a fastening hole is formed in a lower surface of the lower cover corresponding to a fastening protrusion formed on the lower surface of the LED housing. The fastening structure of a liquid crystal display device according to claim 1, wherein a guide part for guiding and supporting the liquid crystal panel is fixed to an edge portion of the lower cover. According to claim 3, Among the guides formed in the edge portion of the lower cover of the guide projection provided in the position corresponding to the formed projection of the LED housing of the guide jaw is formed in the locking jaw is fitted into the projection jaw LED housing Fastening structure of the liquid crystal display device characterized in that the support. The fastening structure of a liquid crystal display device according to claim 1, wherein an optical sheet is provided between the light guide plate and the liquid crystal panel, and a reflecting plate is provided below the light guide plate.

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