KR101309429B1 - Liquid crystal display panel - Google Patents

Abstract

The present invention relates to a liquid crystal display device capable of reducing the non-display area.

The liquid crystal display device comprises a liquid crystal display panel; And a gate tape carrier package electrically connected to gate signal pads formed on the front surface of the liquid crystal display panel and partially bent to be attached to the rear surface of the liquid crystal display panel.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY PANEL}

1 is a cross-sectional view showing a conventional liquid crystal display device.

2 is a cross-sectional view illustrating a liquid crystal display device according to an exemplary embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of region “B” shown in FIG. 2.

Description of the Related Art

52 liquid crystal display panel 54 gate TCP

56: gate drive IC 58: top case

60: guide panel 62: bottom cover

70: reflector 72: lamps

74: side supporter 76: diffuser plate

78: optical sheets

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device capable of reducing a non-display area.

In general, a liquid crystal display device displays an image by adjusting the light transmittance of the liquid crystal using an electric field. To this end, the liquid crystal display device includes a liquid crystal display panel in which liquid crystal cells are arranged in a matrix, and a driving circuit unit for driving the liquid crystal display panel.

The driving circuit unit supplies a gate driver for driving the gate lines, a data driver for driving the data lines, a timing controller for controlling the gate and the data driver, and a power supply for supplying various driving voltages used in the liquid crystal display device. A part is provided.

The data driver and gate driver are directly integrated into multiple integrated circuits (ICs). Each of the directly-driven data drive IC and the gate drive IC is mounted on a tape carrier package (TCP) and connected to a liquid crystal display panel by a tape automated bonding (TAB) method or mounted on a liquid crystal display panel by a chip on glass (COG) method. do.

As shown in FIG. 1, the liquid crystal display device is connected to a liquid crystal display panel 2, a backlight unit for irradiating light under the liquid crystal display panel 2, and gate lines of a lower substrate of the liquid crystal display panel 2. A plurality of gate TCPs 4, gate drive ICs 6 mounted on each of the gate TCPs 4, a guide panel 8 on which the liquid crystal display panel 2 is mounted, A top case 10 surrounds the edge of the liquid crystal display panel 2 and the guide panel 8, and a bottom cover 12 supporting the entire backlight unit.

The backlight unit includes a plurality of lamps 20, a side supporter 22, a diffusion plate 24, and a plurality of optical sheets 26 disposed under the liquid crystal display panel 2.

The guide panel 8 includes a rectangular frame 8a surrounding the side surface of the liquid crystal display panel 2, and a panel support 8b protruding from the inner wall of the rectangular frame 8a to seat the liquid crystal display panel 2. .

The gate TCPs 4 need a clearance where a pattern of signal lines for input and output of the gate drive ICs 6 can be formed. To this end, the gate TCPs 4 are attached to the side surfaces of the liquid crystal display panel 2 in a state in which the gate TCPs 4 extend to the left and right sides of the liquid crystal display panel 2.

For the aesthetics and compactness of such a liquid crystal display device, the non-display area A in which the bezel is not shown is covered outside the active area in which the display image is displayed on the liquid crystal display panel 2 is made small. Needs to be. The non-display area A is a sum of the black matrix area A1 formed at the edge of the liquid crystal display panel 2 and the area A2 in which the gate TCPs 4 are provided. The largest portion of this non-display area A is occupied by the gate TCP 4. This is because the gate TCPs 4 are installed in an unfolded state as described above.

Accordingly, an object of the present invention is to provide a liquid crystal display device capable of reducing the size of a non-display area.

In order to achieve the above object, the liquid crystal display device according to an embodiment of the present invention comprises a liquid crystal display panel; And a gate tape carrier package electrically connected to gate signal pads formed on the front surface of the liquid crystal display panel and partially bent to be attached to the rear surface of the liquid crystal display panel.

The LCD panel includes a plurality of gate lines connected to the gate signal pads and a plurality of data lines connected to the plurality of data signal pads and intersecting the gate lines, and having a lower polarization light attached thereto. Board; And an upper substrate facing the lower substrate with the liquid crystal layer interposed therebetween and to which the upper polarizer is attached.

The gate tape carrier package includes a gate drive integrated circuit for supplying a scan signal to the gate lines.

The liquid crystal display further includes a guide panel having a groove for receiving the gate drive integrated circuit and supporting the liquid crystal display panel.

One side of the gate tape carrier package is attached to the gate signal pads by an anisotropic conductive film, and the other side of the gate tape carrier package is attached to the lower polarizer by double-sided tape.

The guide panel may include a rectangular frame surrounding a side of the liquid crystal display panel; And a panel support part protruding in a horizontal direction from the inner wall of the rectangular frame and having a groove.

LOG signal lines are formed on the lower substrate of the liquid crystal display panel to supply power and control signals required for the gate tape carrier package.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 2 and 3.

2 and 3, a liquid crystal display according to the present invention includes a liquid crystal display panel 52, a backlight unit for irradiating light under the liquid crystal display panel 52, and a gate line of the liquid crystal display panel 52. Gate TCPs 54 connected to the gates, gate drive ICs 56 mounted on each of the gate TCPs 54, and the gate drive ICs 56 supporting the edge of the liquid crystal display panel 52. A guide panel 60 having grooves 61 formed therein to provide a space in which) is disposed, a top case 58 surrounding an upper edge of the liquid crystal display panel 52, a guide panel 60, and a side surface of the backlight unit; And a bottom cover 62 surrounding the side and bottom of the backlight unit.

In the liquid crystal display panel 52, liquid crystal is injected between the upper substrate 52a on which the color filter array is formed and the lower substrate 52b on which the TFT array is formed, and is attached to the upper substrate 52a and the lower substrate 52b. And lower polarizing plates 53a and 53b. On the lower substrate 52b of the liquid crystal display panel 52, the data lines and the gate lines are formed to be orthogonal to each other. The TFT formed at the intersection of the data lines and the gate lines supplies the data from the data lines to the liquid crystal cell in response to the scan pulse from the gate line. For this purpose, the gate electrode of the TFT is connected to the gate line, and the source electrode is connected to the data line. The drain electrode of the TFT is connected to the pixel electrode of the liquid crystal cell.

In the liquid crystal display panel 52, data pads connected to data lines are formed on one side edge of the lower substrate 52b, and gate pads connected to gate lines are formed on the other edge of the lower substrate 52B. . The data pad is attached with output pads of a plurality of data TCPs mounted with a data drive integrated circuit for supplying a data signal to the data lines. The output pad of the data TCP and the data pad of the liquid crystal display panel 52 are electrically conducted through an anisotropic conductive film (hereinafter, referred to as "ACF"). The gate pad is attached with a plurality of gate TCPs 54 mounted with gate drive ICs 56 for supplying scan pulses to the gate lines. The output pad of the gate TCP and the gate pad of the liquid crystal display panel 52 are electrically conducted through the ACF.

On the lower substrate 52B of the liquid crystal display panel, line on glass (hereinafter referred to as "LOG") wiring for directly supplying power and control signals required for the gate TCP 54 is directly formed. By such a LOG wiring, in the liquid crystal display according to the exemplary embodiment of the present invention, a separate gate printed circuit board is not required.

The central portions of the gate TCPs 54 are easily bent by softening such that the base film is formed of a partially soft material or partially removed. In the softened portion, the gate TCPs 54 are bent and attached to the rear surface of the liquid crystal display panel 52. In other words, one side of the gate TCPs 54 is attached to the gate pad of the lower substrate 52b of the liquid crystal display panel 52 through the ACF, and the other side of the gate TCPs 54 is the liquid crystal display panel 52. It is attached to the back of the lower polarizing plate 53b of the double-sided tape. On the other hand, the softened portion of the gate TCPs 54 prevents damage of the signal line patterns of the gate TCPs 54 due to bending stress during bending of the gate TCP 54.

The present invention minimizes the space C2 occupied by the gate TCPs 54 by bending the gate TCPs 54 and attaching them to the rear surface of the liquid crystal display panel 52, and thus, the non-display surface C occupied by the bezel. = C1 + C2 is minimized. Here, 'C1' corresponds to a portion where the black matrix is formed at the edge of the liquid crystal display panel 52. As a result, the liquid crystal display according to the present invention can reduce the width of the non-display area C by 50% or more compared with the prior art.

The gate drive ICs 56 are positioned on the rear surface of the liquid crystal display panel 52 as the gate TCPs 54 are bent. For this reason, the grooves 61 are formed in the guide panel 60 in the portion where the gate drive ICs 56 are disposed so as to avoid interference with the gate drive ICs 56. The guide panel 60 includes a rectangular frame 63 surrounding the side surface of the liquid crystal display panel 52, and a panel support part 62 protruding in the horizontal direction from the inner wall of the rectangular frame 63. A groove 61 into which the gate drive ICs 56 are inserted is formed in a shape of being cut into a predetermined depth and size on the upper surface of the panel support part 62.

The top case 58 is bent in an L ″ shape and surrounds the edge of the liquid crystal display panel 52 and the side surface of the guide panel 60.

The backlight unit includes a plurality of lamps 72 for irradiating light to the liquid crystal display panel 52, side supporters 74 installed at both sides of the bottom cover 62 and supporting both sides of the lamps 72. A diffusion plate 76 which diffuses the light incident from the lamps 72 to the liquid crystal display panel 52, at least one optical sheet 78 disposed on the diffusion plate 76, and a cover A reflector 70 is provided inside the bottom 62 to reflect light from the lamps 72 toward the liquid crystal display panel 52.

The lamps 72 may include discharge tube lamps, such as cold cathode fluorescent lamps (CCFLs), or external electrode fluorescent lamps (EEFLs), or light emitting diodes (LEDs) or the like. It is composed of a combination.

The side supporters 74 are installed on both sides of the lamps 72 to support the lamps 72. When the lamps 72 are selected as the external electrode fluorescent lamps EEFL, the common electrodes are disposed in the inner space of the side supporter 74. The common electrodes supply a driving voltage to a plurality of external electrode fluorescent lamps EEFL in common. The side supporter 74 is made of a material such as plastic, which can be molded and has excellent withstand voltage and insulation properties.

The diffusion plate 76 is positioned on the lamps 72 and manufactured in a plate shape of polymethylmethacrylate (PMMA) in which beads are incorporated, and disposed on the side support 74. The diffuser plate 76 scatters the light incident from the lamps 72 using the beads so that the luminance difference does not occur where and when the lamps 72 are located on the display surface of the liquid crystal display panel 52. Do not In addition, the diffuser plate 76 serves as a support to cover the receiving space of the lamps 72 and to support the plurality of optical sheets 78 from below.

The optical sheets 78 uniformly irradiate the light incident from the diffuser plate 76 onto the entire liquid crystal display panel 52 and increase the luminance in front of the display surface by bending the light propagation path in a direction perpendicular to the display surface. Do it. To this end, the optical sheets 78 include one or more prism sheets and one or more diffusion sheets.

The reflector 70 is formed of a material that reflects light to reflect light from the lamps toward the liquid crystal display panel 52 and is attached to the inner surface of the cover bottom 52 by an adhesive double-sided tape (not shown).

The bottom cover 62 is formed in a container shape open toward the liquid crystal display panel 52 to provide a space in which the lamps 72 are accommodated. The reflection plate 70 is attached to the inner bottom of the cover bottom 62.

As described above, the liquid crystal display according to the present invention has no gate printed circuit board, and the width of the non-display area can be reduced by 50% or more compared to the prior art by banding the gate TCPs and attaching them to the back of the liquid crystal display panel.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (7)

A liquid crystal display panel; And A gate tape carrier package electrically connected to gate signal pads formed on a front surface of the liquid crystal display panel and partially bent to attach to a rear surface of the liquid crystal display panel; The liquid crystal display panel, A lower substrate having a plurality of gate lines connected to the gate signal pads and a plurality of data lines connected to the plurality of data signal pads and crossing the gate lines, and having a lower polarized light attached thereto; And An upper substrate facing the lower substrate with a liquid crystal layer interposed therebetween, and having an upper polarizer attached thereto; The gate tape carrier package is A gate drive integrated circuit for supplying scan signals to the gate lines, A groove for receiving the gate drive integrated circuit is formed and a guide panel for supporting the liquid crystal display panel; The guide panel may include a rectangular frame surrounding a side surface of the liquid crystal display panel; And a panel support protruding in a horizontal direction from the inner wall of the rectangular frame and having the grooves grooved therein. The gate drive integrated circuit is formed on a bottom surface of the gate tape carrier package, The central region of the gate tape carrier package disposed on the side of the liquid crystal display panel is formed of a soft material or softened to be partially removed. The lower portion of the liquid crystal display panel further includes a backlight unit for providing light to the liquid crystal display panel, and a bottom cover surrounding the side and bottom of the backlight unit, The backlight unit may include a plurality of lamps for irradiating light to a liquid crystal display panel, side supporters installed at both sides of the bottom cover to support both sides of the lamps, diffuser plates sequentially disposed on the side supporters, and And an optical sheet and a reflecting plate provided inside the bottom cover. delete delete delete The method of claim 1, One side of the gate tape carrier package is attached to the gate signal pads by an anisotropic conductive film, and the other side of the gate tape carrier package is attached to the lower polarizer by double-sided tape. delete The method of claim 1, On the lower substrate of the liquid crystal display panel, And LOG signal wires for supplying power and control signals necessary for the gate tape carrier package.

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