KR20120067208A - Led array and lcd module including the same - Google Patents

Abstract

PURPOSE: An LED(Light Emitting Diode) array and an LCD module with the same are provided to save manufacturing costs by a structure which replaces a guide panel. CONSTITUTION: A plurality of LED lamps are bonded on one side of a first partition unit(230a) in a row. One end of the first partition unit is vertically extended to the first partition unit. Second partition units(230b-230e) form a closed loop by bonding at least one bending unit. An electrode line is formed on one side of the first partition unit. The electrode line electrically connects the LED lamps.

Description

LED array and liquid crystal display module having same {LED ARRAY AND LCD MODULE INCLUDING THE SAME}

The present invention relates to a liquid crystal display device, and in particular, by changing the structure of the LED array in the liquid crystal display module using a LED array bonded to a plurality of LED lamps as a light source, to support the liquid crystal panel and to prevent leakage of light emitted from the light source. The present invention relates to an LED array and a liquid crystal display module including the same.

As is well known, a flat panel display (FPD) replaces a conventional cathode ray tube (CRT) display and is not only a monitor of a desktop computer, but also a portable computer or mobile phone such as a notebook computer or a PDA. It is a display device essential for implementing a compact and lightweight system such as a terminal. Currently commercially available flat panel display devices include liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting diodes (OLEDs), and the like. In particular, the dual liquid crystal display device has been in the spotlight as a display device of a mobile device, a computer monitor, and an HDTV according to advantages such as excellent visibility, easy thinning, low power, and low heat generation. Since the liquid crystal of the liquid crystal display device is a non-emissive device, a backlight unit is required to provide light to the liquid crystal panel, and the liquid crystal panel and the backlight unit are fastened by using various mechanical structures. It consists of a liquid crystal display module.

1 is a view showing the structure of a conventional liquid crystal display device module, Figure 2 is a view showing a part of the cross section of the liquid crystal display module shown in FIG.

As shown in the drawing, a conventional liquid crystal display device module includes a liquid crystal panel 10 for displaying an image, a backlight unit 20 for providing light to the liquid crystal panel 10, and mechanism units 30 and 40 for modularizing the liquid crystal panel 10. Include.

The liquid crystal panel 10 includes a first substrate on which a color filter (CF) is formed, a plurality of thin film transistor (TFT) substrates disposed below the color filter substrate, and a liquid crystal layer interposed between the substrates. It includes. The liquid crystal panel 10 implements an image according to a control signal of the driver IC 12.

The backlight unit 20 is positioned on the rear surface of the liquid crystal panel 10, and includes an LED array (not shown) that is a light source, a light guide plate 24 disposed to face the LED array (not shown), and a light guide plate 24. A plurality of optical sheets 25 provided in front of the, and a reflective sheet 27 disposed on the rear surface of the light guide plate 24.

The guide panel 30 mounts the above-described liquid crystal panel 10 on the inner stepped portion, supports and fixes the liquid crystal panel 10 by the light shielding tape 35, and surrounds the backlight unit 20 by the inner wall. .

The light blocking tape 35 is disposed at an edge portion of the liquid crystal panel 10 to attach the liquid crystal panel 10 to the guide panel 30 and prevent light leakage from the backlight unit 20.

The cover bottom 40 is fastened to the outside of the guide panel 30 to mount the backlight unit 20 on the bottom surface.

Here, in addition to supporting the liquid crystal panel 10, the above-described guide panel 30 reflects light when the light a traveling through the inside of the light guide plate 24 is emitted to the side part instead of the upper part, and then reflects the inside of the light guide plate 24 again. It is made of synthetic resin material with high reflectance. Typically, the guide panel 30 is manufactured by injection molding.

The above-mentioned injection molding method is to prepare a mold modeled after the outer shape of the guide panel and inject the raw material of plastic resin series to manufacture the guide panel according to the mold. The investment cost of equipment such as an injection machine that injects raw materials as well as a separate mold is increased. need.

In addition, the guide panel should be manufactured to have a thickness of more than a predetermined thickness in order to maintain the minimum rigidity, there is a limit in reducing the bezel area of the liquid crystal display module according to the thickness of the guide panel.

The present invention relates to a liquid crystal display device module including a guide panel, and is conventionally manufactured by supporting a liquid crystal panel and a structure capable of replacing a guide panel serving to enter light emitted from the light guide plate back into the light guide plate. An object of the present invention is to provide an LED array and a liquid crystal display module including the same, which have reduced and minimized the bezel area of the liquid crystal display module.

In order to achieve the above object, an LED array according to a preferred embodiment of the present invention, a plurality of LED lamps; A first partition in which the plurality of LED lamps are bonded in a row on one surface; And a second partition extending from one side of the first partition in a direction perpendicular to the first partition to form a closed loop by folding at least one bent portion.

The first compartment is characterized in that the electrode line is formed on one surface to electrically connect the plurality of LED lamps.

It further comprises a power connection for electrically connecting the electrode line and an external power source.

The second compartment is characterized in that the white dye is coated on the inner surface of the closed loop.

The white dye is characterized in that the double-sided tape member is attached to one area.

In order to achieve the above object, a liquid crystal display module according to a preferred embodiment of the present invention, the liquid crystal panel; A backlight unit disposed on one surface of the liquid crystal panel to provide light; And a cover bottom for mounting the liquid crystal panel and the backlight unit, wherein the backlight unit includes: a light guide plate disposed on one surface of the liquid crystal panel; A first partition in which the plurality of LED lamps are bonded in a row on one surface; An LED array including a second partition extending at one end of the first partition in a direction perpendicular to the first partition to form a closed loop by folding of the bent part and bordering a side surface of the light guide plate; And, it characterized in that it comprises an optical member for switching the light emitted from the light guide plate.

The second partition may be coated with a white dye agent on the side wall to reflect the light emitted from the light guide plate back to the light guide plate.

The second partition may be attached via a double-sided tape member formed on one portion of the light guide plate and the white dye.

The LED array is characterized in that connected to each side end of the liquid crystal panel through a light shielding tape.

The liquid crystal display module including the LED array according to the preferred embodiment of the present invention replaces the conventional guide panel by using an extension of the bent LED array, thereby omitting the guide panel to reduce the manufacturing cost of the liquid crystal display module. There is an effect that can provide a liquid crystal display module with reduced and minimized the bezel area.

1 is a view showing the structure of a conventional liquid crystal display device module.
FIG. 2 is a view showing a part of a cross section of the liquid crystal display module shown in FIG. 1.
3 is an exploded perspective view illustrating a structure of a liquid crystal display module including an LED array according to an exemplary embodiment of the present invention.
FIG. 4 is a diagram illustrating a part of a cross section of the liquid crystal display module of FIG. 3.
5A to 5B show the structure of the LED array disc of the present invention before processing.
6a to 6c are views for sequentially explaining the structure and manufacturing method of the LED array of the present invention.

Hereinafter, an LED array and a liquid crystal display module including the same according to a preferred embodiment of the present invention will be described with reference to the drawings. In the following description, the drawings referred to for the embodiments herein are not intended to limit the shapes and positions of the components to the forms shown, and in particular the drawings are intended to provide an understanding of the structures and shapes that are technical features of the invention. To help, some components have been exaggerated or scaled down.

3 is an exploded perspective view illustrating a structure of a liquid crystal display module including an LED array according to an exemplary embodiment of the present invention, and FIG. 4 is a view illustrating a part of a cross section of the liquid crystal display module of FIG. 3. .

As shown, the liquid crystal display module of the present invention is largely composed of the liquid crystal panel 100, the backlight unit 200 and various mechanical structures.

In detail, the liquid crystal panel 100 is composed of a liquid crystal layer interposed between the first substrate and the second substrate by a predetermined distance and interposed therebetween, and implements an image as a signal is applied from the driver IC 120. . On the first substrate, a thin film transistor as a switching element, various wirings, and pixel electrodes are formed. The second substrate is a color filter substrate for displaying RGB colors, and a color filter layer and a black matrix BM are formed. The driver IC 120 may include a scan driver that provides a scan signal for driving the aforementioned thin film transistor, and a data driver that provides a data signal to the pixel electrode.

A plurality of scan lines and data lines are formed on the first substrate of the liquid crystal panel 100 to define a plurality of pixel regions, and thin film transistors, which are switching elements, are formed in each pixel region. In addition, the thin film transistor includes a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon, etc. on the gate electrode, a source electrode and a drain electrode formed on the semiconductor layer and electrically connected to the data line and the pixel electrode. Is done.

The second substrate is a color filter composed of a plurality of sub-color filters that realize red, green, and blue colors, and a black that separates each sub-color filter and blocks light passing through the liquid crystal layer. It consists of a matrix BM.

The first and second substrates configured as described above are joined to face each other by sealants formed on the outer side of the image display area to form a liquid crystal panel. The first polarizing plate and the second polarizing plate are respectively formed on the front and back surfaces described above. The light is polarized to be incident on the liquid crystal panel 100 and is output.

The backlight unit 200 is disposed on one side of the lower side of the liquid crystal panel 100 and the LED lamp 221 and the LED lamp 221, which are a plurality of light sources emitting light, are bonded and partially extended to the light guide plate 240. An LED array 230 bordering the light guide plate, a light guide plate 240 disposed under the liquid crystal panel 100 to guide light emitted from the LED lamp 221 to the liquid crystal panel 100, and a liquid crystal panel 100. And an optical sheet 250 provided between the light guide plate 240 and one or more diffusion sheets and prism sheets which are guided by the light guide plate 240 to diffuse and condense the light supplied to the liquid crystal panel 100, and the light guide plate 240. It is made of a reflective sheet 227 disposed at the bottom to reflect the light guided to the bottom.

Here, the LED lamp 221 as a light source is an R, G, B light emitting diode (LED) lamp for emitting monochromatic light of R (Red), G (Green), B (Blue), or an LED for emitting white light. Lamps can be used.

When the LED lamp for emitting monochromatic light is disposed, the monochromatic LED lamps of R, G, and B are alternately arranged at regular intervals, and the monochromatic light emitting from the white light is mixed with white light and then supplied to the liquid crystal panel 100, and the white light is supplied. When the LED lamp to emit light is arranged, a plurality of LED lamps are arranged at regular intervals to supply white light to the liquid crystal panel 100.

At this time, the white light LED lamp is composed of a blue LED lamp that emits blue light and a phosphor that absorbs blue monochromatic light to emit yellow light. It is supplied to the liquid crystal panel 100.

In addition, the LED lamp 221 is bonded to the first compartment 230a constituting one LED array 230. The first compartment 230a electrically connects the plurality of LED lamps 221 through an electrode formed on one surface thereof, and the aforementioned electrode is a power connection unit in which a part of the first compartment 230a extends outward. A driving circuit and an external power source (not shown) provided on the rear surface of the liquid crystal display device module are connected to the rear panel 222. As a result, the LED array 230 emits light toward the side of the light guide plate 240 through lighting of the bonded LED lamp 222 during driving.

In addition, the LED array 230 is connected to the second partitions 230b to 230e, one side of which borders the light guide plate 240. The second partitions 230b to 230e surround each side surface of the light guide plate 240 by folding one or more bent portions formed in one straight FPCB. Each of the second partitions 230b to 230e is provided with a predetermined adhesive member therein. It is attached to the side. The first and second partitions 230a to 230e are formed through one FPCB, and a detailed description thereof will be described later.

In addition, the above-described light guide plate 240 is for guiding the light emitted from the LED lamp 221 to the liquid crystal panel 100. Light incident on one side of the light guide plate 240 is added to the inside of the light guide plate 240. The refraction and reflection are repeatedly performed by the diffusing agent to the other side, and then emitted to the upper portion of the light guide plate 240.

The optical sheet 250 improves the efficiency of light emitted from the light guide plate 240 to supply the liquid crystal panel 100. The optical sheet 250 includes a diffusion sheet for diffusing light emitted from the light guide plate 240 and a plurality of prisms for condensing the light diffused by the diffusion sheet so that uniform light is supplied to all regions of the liquid crystal panel 100. It may be made of a sheet. At this time, the diffusion sheet is typically provided, but the prism sheet is composed of a first prism sheet and a second prism sheet in which the prism crosses vertically in the x-axis and y-axis directions, thereby refracting the light in each direction to improve the straightness of the light. It is preferable to comprise so that it may improve.

The reflective sheet 227 reflects the light emitted from the lower portion of the light guide plate 240 instead of the upper part of the light guide plate 240, and serves to advance the upper direction of the light guide plate 240, that is, the liquid crystal panel 100.

The backlight unit 200 having the above-described structure is attached to and fixed to the liquid crystal panel 100 by the light blocking tape 135, and is mounted on the bottom surface of the cover bottom 140 positioned downward. In particular, the light shielding tape 135 not only attaches and fixes the liquid crystal panel 100 and the backlight unit 200, but also leaks light emitted from the backlight unit 200 to the outside through the side surface of the liquid crystal panel 100. It also plays a role in blocking outgoing.

According to this structure, as shown in FIG. 4, in the liquid crystal display module of the present invention, when the light b traveling through the inside of the light guide plate 240 is emitted to the side portion, the emitted light is in close contact with the side surface of the LED. The light is reflected by the array 230 to enter the light guide plate 240 again and enter the liquid crystal panel 100 through the optical sheet 250. Since the above-described LED array 230 is made of FPCB material, the thickness of the LED array 230 is significantly smaller than that of the conventional guide panel (30 in FIG. 2), and is closely adhered to the side surface of the light guide plate 240 through the adhesive member 232. The area occupied is greatly reduced, thereby minimizing the bezel area of the liquid crystal display module.

Hereinafter, the structure of the LED array of the liquid crystal display according to the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

5A to 5B show the structure of the LED array disc of the present invention before processing.

As shown, the LED array 230 of the present invention is a single FPCB of which the disc is '-' shaped, the first partition 230a to which the LED lamp 221 is bonded and the second partition to border the light guide plate. 230b to 230e.

First, a plurality of LED lamps 221 are bonded to the first partition 230a in a horizontal direction and extend from a portion thereof to be connected to the external connection portion 222. The first compartment 230a is connected to the second compartments 230b to 230e extending in a vertical direction at one end thereof, and the first to second compartments 230a to 230e are connected to each node. The bent portions i1 to i4 are formed to be easily folded.

In addition, the rear surface of the second partitions 230b to 230e is coated with a white dye agent 231 to increase the reflectance of light emitted from the light guide plate, and a portion of the white dye agent 231 is attached to the light guide plate. A double-sided tape member 232 of a transparent material may be further provided.

According to this structure, the first partition portion 230a serves as a conventional LED array by folding the bending portions i1 to i4, and the second partition portions 230b to 230e are four sides of the light guide plate. It is bordered to form a normal guide panel (30 in Fig. 2).

Hereinafter, with reference to the drawings will be described the structure and manufacturing method of the LED array according to an embodiment of the present invention.

6a to 6e are views for sequentially explaining the structure and manufacturing method of the LED array of the present invention.

First, as shown in FIG. 6A, the LED array 230 of the present invention includes first and second partitions 230a to 230e. According to the FPCB cutting process, the 'A' shaped LED array 230 is prepared, and a predetermined LED lamp 221 is bonded to one surface of the first partition portion 230a so that each LED lamp 221 and the outside are bonded. Electrically connect the connections. In addition, as shown in FIG. 5B, a white dye 231 coating and a double-sided tape member 232 are attached to the rear surface of the LED array 230. When the attachment is completed, the second partitions 230b to 230e are perpendicular to the first partitions 230a by bending the second partitions 230b to 230e in the rear direction with respect to the bent portion i1. Face the direction.

Thereafter, as shown in FIG. 6B, sidewalls corresponding to each side surface of the light guide plate may be formed by bending the bent portions i2 to i4 formed between the nodes in the second partitions 230b to 230e. Form. At this time, as shown in the inner direction is the direction in which the above-described white dye 231 coating and the double-sided tape member 232 is attached.

Finally, as shown in FIG. 6C, when the second partitions 230b to 230e form a closed loop having a 'ㅁ' shape through the bending of all the bends i1 to i4, the first partition Bending 230a inside the closed loop completes the LED array. Therefore, in the LED array of the present invention, the region in which the LED lamp is mounted and the region for guiding the light guide plate are composed of one FPCB.

In addition, in the above-described embodiment, the guide sections of the light guide plate are first formed by bending the second partitions 230b to 230e, and finally by bending the first partition 230a on which the LED lamp is mounted. Although described as an example of completing the LED array, on the contrary, the first partition portion 230a is first bent to face the light guide plate, and then the second partition portions 230b to 230e are sequentially bent to guide the light guide plate. The LED array of the present invention can also be manufactured by the method of forming the present invention.

The LED array of the present invention according to the above-described structure and manufacturing method extends the FPCB to which the LED lamp is bonded to border each side of the light guide plate, thereby replacing the guide panel provided in the liquid crystal display module having the same. The manufacturing cost of the panel and the thickness of the bezel area can be minimized.

221: LED lamp 222: external connection
230: LED array 230a: first compartment
230b to 230e: second compartment i1 to i4: bend
231: white dye 232: double-sided adhesive tape

Claims (9)

A plurality of LED lamps;
A first partition in which the plurality of LED lamps are bonded in a row on one surface; And
A second partition portion in which one end of the first partition portion extends in a direction perpendicular to the first partition portion to form a closed loop by folding at least one bent portion;
LED array comprising a. The method of claim 1,
The first compartment, the LED array, characterized in that the electrode line for electrically connecting the plurality of LED lamps is formed on one surface. The method of claim 2,
LED array further comprises a power connection for electrically connecting the electrode line and an external power source. The method of claim 1,
The second compartment, the LED array, characterized in that the white dye is coated on the inner surface of the closed loop. The method of claim 4, wherein
The white dye agent, LED array, characterized in that the double-sided tape member is attached to one area. A liquid crystal panel;
A backlight unit disposed on one surface of the liquid crystal panel to provide light; And,
A cover bottom for mounting the liquid crystal panel and the backlight unit;
The backlight unit,
A light guide plate on one surface of the liquid crystal panel;
A first partition in which the plurality of LED lamps are bonded in a row on one surface; And a second partition portion extending from one side of the first partition portion in a direction perpendicular to the first partition portion to form a closed loop by folding of the bent portion to border a side surface of the light guide plate. And,
Optical member for switching the light emitted from the light guide plate
Liquid crystal display module comprising a. The method according to claim 6,
And the second compartment is coated with a white dye agent on a sidewall surface to reflect light emitted from the light guide plate back to the light guide plate. The method of claim 7, wherein
And the second compartment is attached via a double-sided tape member formed on one surface of the light guide plate and the white dye. The method according to claim 6,
The LED array is a liquid crystal display module, characterized in that connected to each side end of the liquid crystal panel through a light shielding tape.

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