KR200358089Y1 - Sheet unification back light assembly having an improved assembly - Google Patents

Abstract

The disclosed integrated sheet assembly backlight assembly is formed integrally by adhering with the reflective sheet and the light guide plate and the light guide agent added on the light guide plate laminated integrally by bonding with an adhesive with a light scattering agent added to the storage space formed in the lower frame It includes a plurality of optical sheets and a reflective sheet, a light guide plate, a lamp unit installed on both sides of the optical sheet to correspond to each other and an upper frame fastened to cover the upper side of the lower frame.

Description

SHEET UNIFICATION BACK LIGHT ASSEMBLY HAVING AN IMPROVED ASSEMBLY}

The present invention relates to a sheet integrated backlight assembly with improved assemblability, and more particularly, to improve assembly performance by forming a plurality of optical sheets constituting the backlight assembly of a liquid crystal display by bonding them together. An improved sheet integrated backlight assembly is disclosed.

In general, a liquid crystal display (LCD) is a light receiving device that does not emit light unlike a cathode ray tube (CRT), and thus, a back light assembly is installed on a rear surface of a liquid crystal display panel. .

Therefore, the liquid crystal display device is constructed by combining them by using a top chassis in a state where a backlight assembly is installed on the rear surface of the liquid crystal display panel.

In this case, the backlight assembly includes a side type light source, a reflective sheet, a light guide plate, and a plurality of optical sheets (diffusion sheet, prism sheet, protective sheet, etc.) sequentially stacked on the lower frame.

A method of assembling a backlight assembly of a conventional liquid crystal display device will be described with reference to FIG. 1.

As shown in FIG. 1, the upper part of the lower frame 180 is sequentially a reflector sheet 170, a light guide plate 160, a prism sheet 130, a diffuser 140, and the like. Protector 120 is housed. In addition, a lamp unit 150 having a diameter of several mm is installed at one or both ends of the light guide plate 160. `

The light guide plate 160 is to uniformly transmit the light from the lamp unit 150 to a liquid crystal display panel (not shown). The light guide plate 160 is a transparent acrylic material having a thickness of about several mm. Dots or 'V' shaped grooves are formed. The reflective sheet 170 is installed under the light guide plate 160 and serves to reflect the light emitted from the lamp unit 150 to the light guide plate 160 to reflect light from the bottom to the upper side.

Two or three pieces of the prism sheet 130 and the diffusion sheet 140 are properly combined and installed on the light guide plate 160. The prism sheet 130 and the diffusion sheet 140 diffuse or condense the light emitted from the light guide plate 160 to improve luminance or view angle. To improve. A protective sheet 120 is installed on the top layer of the backlight assembly to protect sensitive sheets caused by dust or scratches and to prevent the flow of the sheets when only the backlight assembly is transported.

Here, the stacking method of the multiple optical sheets 300, that is, the diffusion sheet 140, the prism sheet 130, and the protective sheet 120 sequentially stacked on the light guide plate 160 will be described.

As shown in FIG. 1, the reflective sheet 170 and the light guide plate 160 are sequentially stacked on the storage space 182 of the lower frame 180, and the lamp unit 150 is installed at both ends of the light guide plate.

Thereafter, the diffusion sheet 140 and the plurality of prism sheets 130 are laminated on the light guide plate 160 in order, and then the protective sheet 120 is laminated.

After stacking the optical sheets 300 in order, the upper frame 110 is fastened to the lower frame 180 in a state where the liquid crystal display panel is stacked on the upper side, thereby completing the assembly of the backlight assembly.

However, when stacking a plurality of optical sheets in sequence as described above, the cause of the increase in the number of processes occurs in terms of the assembly process of the backlight assembly. Therefore, a problem arises that causes an increase in the assembly cost.

In addition, since the optical sheets are laminated individually, when the fixing members of the fixing members are not accurately inserted and fixed in the fixing grooves formed in the optical sheets, the optical sheets may be distorted due to external impacts. There is a problem that it is difficult to express a precise image when forming the image on the liquid crystal display panel because the luminance of the emitted light is unevenly formed.

Therefore, the present invention has been made to solve a number of problems caused in the conventional backlight assembly assembly process as described above, integrally formed by using a predetermined adhesive of a plurality of optical sheets stacked on the lower frame. In addition, the light guide plate and the reflective sheet are integrally formed to simplify the assembly process, reduce the assembly cost, and add a predetermined light scattering agent to the adhesive. To provide the assembly.

1 is an exploded perspective view showing a conventional backlight assembly,

2 is an exploded perspective view showing a backlight assembly of the present invention,

3A is a view showing that the optical sheets shown in FIG. 2 are bonded and integrated;

Figure 3b is a view showing a state in which the adhesive is applied to the optical sheets,

3c is a view showing a state in which an optical sheet is adhered by applying an adhesive including a light scattering agent,

4 is a view showing that the light guide plate and the reflective sheet shown in FIG. 2 are bonded and integrated;

Figure 5a is a view showing a state in which the adhesive is applied to the variable portion of the optical sheet shown in Figure 3a,

FIG. 5B is a view showing a state in which an adhesive is applied to the entire surface of the optical sheets shown in FIG. 3A.

<Explanation of Signs of Major Parts of Drawings>

110: upper frame 120: protective sheet

130: prism sheet 140: diffusion sheet

150: lamp unit 160: light guide plate

170: reflection sheet 180: lower frame

182: storage space 200: adhesive

240: light scattering agent 300: optical sheet

An integrated sheet backlight assembly having improved assembly of the present invention includes a lower frame constituting a predetermined storage space; A reflection sheet and a light guide plate stacked on the storage space; A plurality of optical sheets installed on the light guide plate and bonded together with a predetermined adhesive to be integrally formed; A lamp unit installed to correspond to each other on both sides of the reflective sheet, the light guide plate, and the optical sheet; And an upper frame fastened to cover the upper side of the lower frame.

Here, the plurality of optical sheets is formed integrally, it is preferable that the adhesive is formed so as to be adhered to the front or variable portion of the plurality of optical sheets.

In addition, it is preferable that a predetermined light scattering agent is further added to the adhesive to increase the scattering property of the light emitted from the lamp unit.

In addition, the light scattering agent is preferably a metal oxide type.

The light scattering agent is preferably at least one of aluminum oxide, barium carbonate, barium sulfate, and barium titanate.

Further, the reflective sheet and the light guide plate are preferably formed integrally by bonding with the adhesive.

Referring to Figures 1 to 5b the configuration of the integrated sheet backlight assembly with improved assembly of the present invention configured as described above are as follows.

FIG. 2 is a view illustrating a process of assembling a backlight assembly in which an integrated optical sheet, a light guide plate, and a reflective sheet are integrally formed.

As shown in FIGS. 2 and 3A, the integrated sheet assembly backlight assembly of the present invention has a reflective sheet stacked on the lower frame 180 and the storage space 182 forming a predetermined storage space 182. 170, the light guide plate 160, the plurality of optical sheets 300 installed on the light guide plate 160 and integrated with a predetermined adhesive 200, the reflective sheet 170, the light guide plate 160, and the optical sheet. Lamp unit 150 and the upper frame 110 is fastened to cover the upper side of the lower frame 180 is installed to correspond to each other on both sides of the flow (300).

5A and 5B are views illustrating a state in which an adhesive is uniformly applied to the variable portion or the front surface of the rear surface of the protective sheet.

Here, as shown in FIGS. 5A and 5B, the adhesive 200 is formed to be adhered to the entire surface or the variable part of the plurality of optical sheets 300.

2 to 3C, the adhesive 200 is a metal oxide-based material to increase light scattering emitted from the lamp unit 150. (Barium carbonate), (Aluminum oxide), (Barium sulfate), At least one light scattering agent 240 of (barium titanate) is further added.

In addition, as shown in FIG. 4, the reflective sheet 170 and the light guide plate 160 are bonded to the adhesive 200 to be integrally formed.

Referring to the preferred embodiment of the present invention configured as described above taking the backlight assembly as an example as follows.

2, in order to integrate the light guide plate 160 and the reflective sheet 170 stacked on the storage space 182 of the lower frame 180 as shown in FIG. An adhesive 200 is applied to the upper surface to be bonded to form an integrated body.

Here, the method of applying the adhesive 200 is applied to the variable portion of the reflective sheet 170 or the light guide plate 160, or uniformly applied to the entire surface and adhered.

In addition, the optical sheets 300 stacked on the light guide plate 160 also have a surface where the optical sheets 300 are adhered to each other as shown in FIGS. 5A and 5 using the adhesive 200 as described above. Apply uniformly to the variable part or front of the adhesive.

5A and 5B are diagrams illustrating a state in which adhesive is applied to the variable portion and the front surface of the lower surface of the protective sheet 120.

As a result, as shown in FIG. 3A, the diffusion sheet 140, the two prism sheets 130, and the protection sheet 120 are adhered to each other to form an integrated body.

A process of stacking the reflective sheet 170, the light guide plate 160, and the optical sheets 300, which are integrally formed as described above, on the storage space 182 of the lower frame 180 will be described below.

First, referring to FIGS. 2 to 4, the reflective sheet and the light guide plate integrated with the adhesive 200 are stacked on the storage space 182 of the lower frame 180.

After the integrated light guide plate 160 and the reflective sheet 170 are stacked on the storage space 182, side type lamp units 150 are installed on both side surfaces of the light guide plate 160.

In addition, a plurality of optical sheets 300 integrated with the adhesive 200 shown in FIG. 3A are laminated on the light guide plate.

Subsequently, the upper sheet 110 is bound to the lower frame 180 by using the upper frame 110 from the upper side of the optical sheets 300.

Next, another embodiment of the present invention will be described using the backlight assembly process as an example.

As shown in FIG. 3C, another embodiment of the present invention adheres the adhesive sheet 200 to which the reflective sheet 170 and the light guide plate 160 are adhered, and that the optical sheets 300 are integrally adhered to each other. The light scattering agent 240 is further added to increase the scattering property of the light emitted from the lamp unit 150.

Here, the light scattering agent 240 additionally added to the adhesive 200 is a metal oxide-based chemical, for example, (Barium carbonate), (Aluminum oxide), (Barium sulfate), Any one of (barium titanate) is selected, and a small amount is added to the adhesive 200 to be used.

As a result, the light emitted from the lamp unit 150 installed on the storage space 182 of the lower frame 180 is incident on the light guide plate 170 formed of an acrylic material by being reflected by the reflective sheet 170, and a light scattering agent. The light scattering property is increased through the adhesive 200 to which the 240 is added, and is supplied to the upper optical sheet 300.

In this case, the light supplied to the optical sheets 300 is increased in the light scattering property by the light scattering agent 240 added to the adhesive 200 adhered between the optical sheets 300 to form a liquid crystal display panel (not shown). The brightness of the light supplied to can be expected to increase.

In addition, as described above, the light guide plate 160 and the reflective sheet 170 are integrated with each other, and the optical sheets 300 are attached to the adhesive 200 by adding a light scattering agent 240 to form an integrated structure. The gas layer formed between the light guide plate 160 and the reflective sheet 170 or between the optical sheets 300 is removed to be integrally formed.

As described in detail above, the number of processes by the operator during the stacking on the storage space of the lower frame by bonding the optical sheets together in one piece using an adhesive before assembling the backlight assembly and forming the light guide plate and the reflection sheet in one piece. There is an effect to reduce.

In addition, by integrating a plurality of optical sheets and bonding and integrating the reflective sheet and the light guide plate, it is possible to minimize the flow generated by an external impact.

In addition, by reducing the assembly process of the backlight assembly can be expected to reduce the manufacturing cost.

In addition, by adding a small amount of a metal oxide light scattering agent to the adhesive, there is an effect of increasing the scattering of the light emitted from the lamp unit to increase the brightness of the light supplied to the liquid crystal display panel.

Claims (6)

A lower frame constituting a predetermined storage space; A reflective sheet and a light guide plate stacked on the storage space; A plurality of optical sheets installed on the light guide plate and bonded together with a predetermined adhesive to be integrally formed; A lamp unit installed to correspond to each other on both sides of the reflective sheet, the light guide plate, and the optical sheet; And And an upper frame fastened to cover the upper side of the lower frame. The sheet integrated backlight assembly of claim 1, wherein the plurality of optical sheets are integrally formed, and the adhesive is applied to the front or variable parts of the plurality of optical sheets. . 3. The sheet integrated backlight assembly of claim 2, wherein the adhesive further includes a predetermined light scattering agent to increase scattering of light emitted from the lamp unit. 4. The sheet integrated backlight assembly of claim 3, wherein the light scattering agent is a metal oxide. The sheet integrated backlight assembly of claim 4, wherein the light scattering agent is at least one of aluminum oxide, barium carbonate, barium sulfate, and barium titanate. The sheet integrated backlight assembly of claim 1, wherein the reflective sheet and the light guide plate are integrally bonded by the adhesive.