KR100960165B1 - LCD with Narrow Bezel - Google Patents

Abstract

The present invention relates to a liquid crystal display device having a narrow bezel designed to slim the bezel width of the front LCD to improve the continuity of the screen when the multi-screen configuration of the tiled form, the Vcom line 130 to the liquid crystal panel 100 Outside the interior or via a COF mounted with a gate IC 112 to minimize the width of the black matrix 105 outside the liquid crystal panel 100, or to cross the line across the active area of the liquid crystal panel 100. The black matrix 107 is formed on the bottom to minimize the width of the black matrix 105 outside the liquid crystal panel 100. In response, the backlight unit 180 has a lower chassis 200 in which the lighting means 202 is installed at the bottom thereof. ), A plurality of optical sheets 206 stacked on top of the sidewall 208 of the lower chassis 200, and are installed on the optical sheet 206 to fix the optical sheets 206 to fix the liquid crystal panel. Mold 2 for seating 100 10) and an upper chassis 220 coupled to the upper portion of the liquid crystal panel 100 to fix the position of the liquid crystal panel 100 mounted on the mold 210.

LCD, Bezel, Black Matrix, BM, Liquid Crystal Panel, Vcom, Backlight Unit, BLU

Description

Liquid crystal display having narrow bezel

The present invention relates to a liquid crystal display device having a narrow bezel, and more particularly, a narrow bezel designed to minimize the BM width of the outside of the liquid crystal panel and to narrowly design the bezel width of the front of the LCD. It relates to a liquid crystal display device having a.

In general, a liquid crystal display (LCD) is formed by bonding a TFT (Thin Film Transistor) substrate and a color filter to form a liquid crystal panel, and a back light unit (BLU) is installed on the rear side of the liquid crystal panel. do. In such an LCD, when a predetermined voltage is applied to the TFT formed on the TFT substrate, the arrangement of the liquid crystals enclosed in the liquid crystal panel is changed, and the optical characteristics of the light passing through the polarizing plate and the liquid crystal are changed to color through the color filter. It is a display means for outputting the image.

1 shows a laminated structure of a typical LCD. The LCD generally has a structure in which the BLU 10, the TFT substrate 20, and the color filter 30 are stacked in the lower chassis and the upper chassis. The BLU 10 is a light emitting means for giving visibility to the LCD. The TFT substrate 20 is provided with a TFT, a charge accumulation capacitor, a gate line wiring, a source line wiring, and the like, and is bonded to the color filter 30 to form a liquid crystal panel 40. The color filter 30 imparts a color to the amount of light that changes according to the arrangement change of the liquid crystal, and a photoresist of RGB is deposited on the glass substrate, and a polarizing film is attached onto the color filter 30. The drive IC for driving the panel is mounted at the edge portion of the TFT substrate 20. The source IC 23 is mounted on the lower edge portion of the TFT substrate 20, and the gate IC 27 or an amorphous silicon gate circuit (ASG) is mounted on the side edge portion of the TFT substrate 20.

2 shows an example in which a conventional TFT substrate 20 and a color filter 30 are bonded to form a liquid crystal panel 40. Referring to this, the source IC 23 and the gate IC 27 are mounted on the lower edge portion and the right edge portion of the TFT substrate 20 in the form of Chip On the Film (COF) or Chip On the Glass (COG), respectively. do. In addition, the left edge portion and the upper edge portion of the TFT substrate 20 form a dummy region 50, and the dummy pad 50 for inspecting the liquid crystal panel 40 after bonding ICs is formed in the dummy region 50. Are mounted. A Vcom line 60 is provided at a portion where the TFT substrate 20 and the color filter 30 are bonded to each other or an outer line of the TFT substrate 20 to provide a reference voltage for determining polarity when driving the liquid crystal. As shown, the Vcom line 60 forms a short point 65 that is energized with the color filter 30 at each corner of the liquid crystal panel 40. The Vcom line 60 is used as a bias voltage of the charge storage capacitor formed in the TFT substrate 20, and in some cases, transmits the Vcom signal to the color filter 30 side.

3 and 4 illustrate a case in which the ASG 29 is mounted in place of the gate IC 27. As shown, when the ASG 29 is mounted on the left and right edges of the liquid crystal panel, the Vcom line 60 may be disposed close to the ASG 29. The ASG 29 is mounted on the left and right outer regions (regions indicated by BLOCK-A and BLOCK-B in FIG. 3) of the TFT substrate 20, and correspondingly, Vcom lines 60 are disposed on the left and right outer lines. Is formed.

2 to 4, a drive IC such as the gate IC 27 or the ASG 29 is mounted in the outer region of the liquid crystal panel 40, or the Vcom line 60 is mounted. In addition, a seal 25 is applied to the outer region of the liquid crystal panel 40 to bond the TFT substrate 20 and the color filter 30 to each other. The drive IC mounting area, the Vcom line 60 mounting area, and the seal coating areas are areas in which an image is not displayed. Among them, the ASG 29, the Vcom line 60, the seal 25, and the like are the color filters 30. ) Is hidden by the Black Matrix (BM) 35, which is an image non-display area printed on the outer area of the bottom surface.

As shown in the cross-sectional view of Fig. 4, the conventional LCD has a wider width of the BM 35 due to the drive IC mounting of the outer portion and the width of the Vcom line 60. Accordingly, the housing of the LCD also had to widen the width of the bezel constituting the front surface as will be described later.

5 is a cross-sectional view illustrating a state in which the above components are accommodated in the lower chassis 70 and the upper chassis 90. Referring to the cross-sectional view of FIG. 5, the BLU 10 includes a lighting means 72 installed at the bottom of the lower chassis 70, a heat insulating plate 74 stacked on the upper portion of the lighting means 72, and a heat insulating plate 74. ) Is composed of optical sheets 76 stacked on top of the upper panel, and an upper chassis 90. The upper chassis 90 is also referred to as the bezel forming the appearance of the LCD.

In the illustrated example, the luminaire 72 is a Cold Cathode Fluorescent Lamp (CCFL), and a socket 73 to which the CCFL is connected is installed at the inner edge of the lower chassis 70. At this time, in order to conceal the dark portion generated by the socket 73 of the CCFL, and to install the heat insulating plate 74 and the optical sheet 76, the first mold 75 is installed on the upper portion of the lighting means (72). In addition, in order to stably stack the liquid crystal panel 40 on the upper portions of the optical sheets 76, a second mold 77 is disposed on the upper end of the lower chassis 70. And, in order to fix the liquid crystal panel 40, the upper chassis 90 for pressing the circumference of the liquid crystal panel 40 is coupled.

In the configuration of the LCD, since the area of the BM 35 outside the liquid crystal panel 40 is an area where no image is displayed, the upper chassis 90 is designed to sufficiently cover the area where the BM 35 is formed. As shown, the front portion of the upper chassis 90 has a width of W1. That is, as the BM 35 outside the liquid crystal panel 40 has a considerable width, the bezel width of the front of the LCD becomes wider. In the case of general LCDs, the increase in the bezel width does not affect the competitiveness of the product. However, when a plurality of large-screen LCDs (approximately 40 inches or more) are combined to form a so-called "tiled" type multi-screen, the bezel outside the LCD is It decreases the continuity of the screen and acts as a factor that hinders the readability of characters.

Meanwhile, the conventional LCD requires a first mold 75 to seat the heat insulating plate 74 and the optical sheets 76, as shown in FIG. 5, to fix the optical sheets 76 and to mount the liquid crystal panel 40. In order to do so, a second mold 77 was required. As such, in the structure of stacking a plurality of molds, due to the overlap of the lower chassis 70 and the molds 75 and 77, assemblage is degraded due to an increase in components, and it is difficult to implement a narrow bezel LCD. have.

The present invention has been proposed to solve the above problems, and by minimizing the BM width of the liquid crystal panel, and correspondingly by narrowing the width of the front surface of the upper chassis of the BLU, ultimately the bezel width of the LCD front It is an object of the present invention to provide a liquid crystal display having a narrow bezel that improves continuity of a screen and improves text readability when a multi-screen configuration in which a plurality of LCDs are combined to form a narrow screen.

In addition, the present invention allows the components such as the optical sheet to be directly stacked on the upper end of the side wall of the lower chassis, does not require a separate mold for stacking the optical sheet to simplify the components and improve the assemblage There is this.

In addition, the present invention is to provide additional lighting means to cover the socket portion of the CCFL when the CCFL is installed as a lighting means in the bottom of the lower chassis, another object to prevent the dark portion is generated at the edge of the liquid crystal panel have.

In addition, another object of the present invention is to install an additional lighting means or to install a light guide plate inside the side wall of the lower chassis, thereby preventing the occurrence of a dark portion outside the liquid crystal panel.

In addition, in order to compensate for the weakening of the fixed structure of the edge portion of the liquid crystal panel according to the implementation of the narrow bezel, the liquid crystal panel may be stacked in a curved state to the rear side, or may be supported to support the liquid crystal panel on the lower chassis and the upper chassis. Another purpose is to prevent the breakage of the liquid crystal panel by protruding toward the front side or by sinking to the rear side by installing a bar.

In the liquid crystal display device having the narrow bezel of the present invention for achieving the above object, the TFT substrate 110 and the color filter 120 is bonded to form a liquid crystal panel 100, the liquid crystal panel 100 In the liquid crystal display device in which the backlight unit 180 is installed on the rear surface of the liquid crystal panel 100, the Vcom line 130 for applying the reference voltage is provided outside the liquid crystal panel 100 or the gate of the liquid crystal panel 100. The IC 112 is installed via a COF in which the IC 112 is mounted. The backlight unit 180 includes a lower chassis 200 having a lighting unit 202 installed at a bottom thereof, and an upper sidewall 208 of the lower chassis 200. A plurality of optical sheets 206 stacked on the optical sheet 206, a mold 210 installed on the optical sheet 206 to fix the optical sheets 206, and seating the liquid crystal panel 100, and the mold. (210) is coupled to the upper portion of the liquid crystal panel 100 to fix the position of the liquid crystal panel 100 seated on the upper Characterized in that configured to include a top chassis 220.

According to a preferred embodiment, a plurality of fixing protrusions 231 are installed at the upper end of the side wall 208 of the lower chassis 200, and the fixing protrusions 231 are formed around the optical sheet 206 and the mold 210. A plurality of through holes 232 are formed to correspond to the optical sheet 206, and the optical sheets 206 are stacked on the upper end of the side wall 208 of the lower chassis 200 without a separate mold. In this case, the front surface of the mold 210 and the upper chassis 220 has a width that does not protrude into the side wall 208 of the lower chassis 200, thereby narrowing the front bezel width of the LCD. Can be designed.

According to a more preferred embodiment, the lighting means 202 is a CCFL installed along the longitudinal direction at the bottom of the lower chassis 200, the interior of the lower chassis 200 additional lighting for covering the socket portion of the CCFL Means 205 are laid. The additional lighting means 205 prevents the dark portion from occurring at the edge portion of the liquid crystal panel 100 and improves the light uniformity of the backlight unit 180. In this case, the additional lighting means 205 may be a CCFL placed in a direction crossing the CCFL, or may be an LED.

As another example, the luminaire 202 is a known luminaire such as a CCFL or LED, and an additional luminaire 205 is provided or a light guide plate is installed inside the side wall 208 of the lower chassis 200. Additional lighting means 205 may be applied to all known lighting means such as CCFL or LED. When the light guide plate is installed, the light guide plate is incident on the light of the lighting means 202 and surface-emitting from the inner side surface of the side wall 208. As such, by installing additional lighting means 205 or installing a light guide plate inside the side wall 208 of the lower chassis 200, it is possible to more effectively prevent the occurrence of dark portions at the edge portion of the liquid crystal panel 100.

According to a more preferred embodiment, the side walls 208 of the long side opposite to each other of the side walls 208 of the lower chassis 200 are formed to be bent to the rear side, correspondingly to the mold 210 and the upper chassis ( The long side portion 220 is also formed to bend to the rear side. Therefore, the optical sheets 206 and the liquid crystal panel 100 are stacked in a state of being bent to the rear side, and the liquid crystal panel 100 may be prevented from protruding forward even if the fixing structure of the edge portion of the liquid crystal panel 100 is weak. .

According to a more preferred embodiment, the support bar 215 across the long side wall 208 to support the rear side of the optical sheet 206 and the liquid crystal panel 100 on the upper end of the lower chassis 200 Is installed. The support bar 215 supports the liquid crystal panel 100 more firmly to prevent the liquid crystal panel 100 from being recessed toward the rear side. In the present embodiment, the upper end of the support bar 215 is covered by the light guide plate 252. Therefore, the dark portion of the liquid crystal panel 100 is prevented from being generated by the support bar 215.

In the liquid crystal display device having the narrow bezel of the present invention for achieving the above object, the TFT substrate 110 and the color filter 120 is bonded to form a liquid crystal panel 100, the liquid crystal panel 100 In the liquid crystal display device having the backlight unit 180 installed on the rear surface of the liquid crystal panel, the liquid crystal panel 100 may include a black matrix (black matrix) on at least one cross line crossing the active area in which the screen is displayed in the longitudinal or transverse direction. 107 is formed, the gate IC 112 or ASG is mounted in an area where the black matrix 107 is formed, the backlight unit 180 is a lower chassis 200, the lighting means 202 is installed at the bottom And a plurality of optical sheets 206 stacked on the upper sidewalls 208 of the lower chassis 200 and installed on the optical sheets 206 to fix the optical sheets 206 to fix the liquid crystal panel. Mold 210 for seating (100), and DE shall be 210, characterized in that configured to include a top chassis 220 coupled to the upper portion of the liquid crystal panel 100 to fix the location of the liquid crystal panel 100 is seated on the top.

According to a preferred embodiment, a plurality of fixing protrusions 231 are installed at the upper end of the side wall 208 of the lower chassis 200, and the fixing protrusions 231 are formed around the optical sheet 206 and the mold 210. A plurality of through holes 232 are formed to correspond to the optical sheet 206, and the optical sheets 206 are stacked on the upper end of the side wall 208 of the lower chassis 200 without a separate mold. In this case, the front surface of the mold 210 and the upper chassis 220 has a width that does not protrude into the side wall 208 of the lower chassis 200, thereby narrowing the width of the front bezel of the LCD. can do.

According to a more preferred embodiment, the lighting means 202 is a CCFL installed along the longitudinal direction at the bottom of the lower chassis 200, the interior of the lower chassis 200 additional lighting for covering the socket portion of the CCFL Means 205 are laid. The additional lighting means 205 prevents the dark portion from occurring at the edge portion of the liquid crystal panel 100 and improves the light uniformity of the backlight unit 180. In this case, the additional lighting means 205 may be a CCFL placed in a direction crossing the CCFL, or may be an LED.

As another example, the luminaire 202 is a known luminaire, such as a CCFL or LED, and an additional luminaire 205 is installed inside the side wall 208 of the lower chassis 200. Additional lighting means 205 may be applied to all known lighting means such as CCFL or LED. By installing the additional lighting means 205 inside the side wall 208 of the lower chassis 200, it is possible to more effectively prevent the dark portion generated at the edge portion of the liquid crystal panel 100.

According to a more preferred embodiment, the side walls 208 of the long side opposite to each other of the side walls 208 of the lower chassis 200 are formed to be bent to the rear side, correspondingly the mold 210 and the upper chassis 220 The long side part of) is also formed to bend to the back side. Therefore, the optical sheets 206 and the liquid crystal panel 100 are stacked in a state of being bent to the rear side, and the liquid crystal panel 100 may be prevented from protruding forward even if the fixing structure of the edge portion of the liquid crystal panel 100 is weak. .

According to a more preferred embodiment, the lower chassis 200 supports the optical sheets 206 and the back side of the liquid crystal panel 100 in correspondence with the black matrix 107 area of the cross line of the liquid crystal panel 100. The support bar 215 is provided to firmly support the liquid crystal panel 100. In addition, the upper chassis 220 also supports the optical sheets 206 and the front side of the liquid crystal panel 100 corresponding to the black matrix 107 area of the cross line of the liquid crystal panel 100. ) Is installed. Therefore, the liquid crystal panel 100 may be more firmly supported and installed, and the liquid crystal panel 100 may be prevented from protruding toward the front side or recessed toward the rear side.

According to the liquid crystal display device having a narrow bezel of the present invention, the BM line is formed outside the liquid crystal panel by installing the Vcom line on the outside of the liquid crystal panel, or forming a black matrix on the cross line of the liquid crystal panel and mounting the drive IC thereon. The width can be minimized, and correspondingly, the width of the front surface of the upper chassis of the BLU is minimized, so that the continuity of the screen can be improved and the readability of characters can be improved when the multi-screen configuration in which the LCDs are combined is combined. have.

In addition, according to the present invention, by forming a fixing projection on the upper end of the side wall of the lower chassis of the BLU, and correspondingly forming a through hole in the periphery of the optical sheet, the optical sheet is mounted directly to the upper end of the side wall of the lower chassis It can reduce and improve assembly. In addition, by preventing the width of the front portion of the mold and the upper chassis from protruding into the sidewall of the lower chassis, the narrow bezel may be realized while preventing the active area of the liquid crystal panel from being blocked by the mold and the upper chassis.

Further, according to the present invention, when the CCFL is installed as a lighting means in the lower chassis bottom, additional lighting means covering the socket portion of the CCFL is provided to improve the light uniformity of the BLU, and the dark portion at the edge of the liquid crystal panel. It is effective to prevent the occurrence.

In addition, according to the present invention, by installing additional lighting means or a light guide plate inside the side wall of the lower chassis, there is an effect that can effectively suppress the occurrence of the dark portion of the edge of the liquid crystal panel.

In addition, according to the present invention, in order to compensate for the weakening of the fixed structure of the liquid crystal panel according to the design of the narrow bezel, by mounting the liquid crystal panel bent to the rear side, thereby stabilizing the installation structure of the liquid crystal panel, It is effective to prevent the panel from protruding to the front.

In addition, according to the present invention, by providing a support bar across the upper end of the lower chassis, the support bar supports the rear surface of the liquid crystal panel, thereby preventing the liquid crystal panel from being recessed toward the rear side and having a more stable position fixing. In addition, a light guide plate may be provided to cover the support bar, thereby preventing the dark part from being generated in the central portion of the liquid crystal panel by the support bar.

Further, according to the present invention, in the case of forming the BM in the cross line of the liquid crystal panel, support bars are provided in the lower chassis and the upper chassis corresponding to the BM area of the cross line of the liquid crystal panel, and the support bar is the liquid crystal panel and the optical. By supporting the components such as the sheet, there is an effect that the liquid crystal panel can be supported more firmly.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

First of all, the present invention minimizes the width of the black matrix (hereinafter referred to as "BM") of the liquid crystal panel outside, and correspondingly minimizes the width of the upper chassis front part of the backlight unit (hereinafter referred to as "BLU"), ultimately. The present invention relates to a liquid crystal display device having a slim bezel width of an LCD front surface and good continuity of a screen when a tiled multi-screen configuration in which a plurality of LCDs are combined.

Hereinafter, two models are proposed as an embodiment for minimizing the BM width of the liquid crystal panel. In the first model, the Vcom line, which is conventionally mounted in the outer region of the liquid crystal panel, is installed on the outside of the liquid crystal panel, or the Vcom line is installed to pass through the COF mounted with the gate IC to remove the Vcom line mounting portion outside the liquid crystal panel. Reducing the width reduces the BM width of the outer area. The second model forms a BM on a cross line that crosses the active area of the liquid crystal panel in the longitudinal or transverse direction, and mounts a drive IC such as a gate IC or an ASG in the BM area of the cross line to form a BM on the outside of the liquid crystal panel. It is to reduce the width. In addition, both models described above may be applied to minimize the BM width of the outside of the liquid crystal panel.

In both models, the BM width of the liquid crystal panel is slimmer, and the configuration of the BLU is simplified accordingly. The present invention proposes such a simpler configuration of the BLU. In addition, when the BM width of the liquid crystal panel outside becomes slim, the components of the BLU should be designed so as not to cover the active area of the liquid crystal panel. For example, the front part of the upper chassis should be designed so as not to cover the active area of the liquid crystal panel. As the front of the upper chassis is designed to be slim, the narrow bezel of the present invention may be implemented.

In the following description, the term "cross line" refers to a virtual line formed on the liquid crystal panel to cross the active area in which the actual screen is displayed in the longitudinal or transverse direction. In other words, the "cross line" means a line for dividing the active area into a plurality of screens.

FIG. 6 is a plan view illustrating an exemplary configuration of a liquid crystal panel according to the present invention, in which a gate IC 112 is mounted at a right edge of a TFT substrate 110 and a source IC 116 is mounted at a lower edge thereof. Shows. The gate IC 112 is a drive IC that applies a drive signal to a horizontal gate line formed on the TFT substrate 110, and the source IC 116 is a drive IC that applies a drive signal to a source line in the longitudinal direction. In the example shown, the gate IC 112 and the source IC 116 are each mounted in the form of a COF, but the drive ICs may be mounted in the form of a chip on the glass (COG). When the drive ICs are mounted in the form of COG, the color filter 120 bonded to the upper surface of the TFT substrate 110 may be partially cut and the drive ICs may be mounted.

As illustrated, a dummy region 150 is formed at the left edge portion and the upper edge portion of the liquid crystal panel 100. In this dummy region 150, inspection pads 52 for inspecting the liquid crystal panel 100 are mounted before bonding of the ICs. After the TFT substrate 110 and the color filter 120 are bonded, the liquid crystal panel 100 needs to be inspected before the T_con block 140 for applying the driving signal to the drive ICs is coupled. In the first inspection process, a probe is connected to the inspection pad 52 to apply a test signal to the gate line and the source line formed on the TFT substrate 110. The dummy area 150 is a mounting area for the test pad 52 to receive the test signal, and is a substantially unnecessary area after the T_con block 140 is connected. Since the liquid crystal display of the present invention is directed toward narrow BM, the dummy regions 150 may be removed after the inspection process. On the other hand, in the case of a large screen LCD, the dummy area 150 as described above may not exist. For example, a probe may be directly connected to a COF pad or a COG pad connected to the gate line and the source line without applying the test pad 52, and may apply a test signal.

As shown, the BM 105 is formed along the outer line of the liquid crystal panel 100. In more detail, when fabrication of each of the TFT substrate 110 and the color filter 120 is completed, the foreign matter on the surface is removed through a cleaning process, a process of printing an alignment film, and the like, followed by the TFT substrate 110 and the color filter. A seal is applied along the outline of 120. In this case, the BM 105 is printed on the lower surface of the outer line of the color filter 120 to conceal the region to which the seal 125 is applied. In addition, the BM 105 serves to conceal components mounted on the outside of the liquid crystal panel 100.

As shown in the liquid crystal panel 100 of the present invention, a Vcom line 130 is mounted on the FPC 132 or a signal transmission medium such as a COF, a wire, a PCB, and the like. Is bypassed to the outside of the liquid crystal panel 100 and installed. In one embodiment, the FPC 132 connects the Vcom circuit unit 142 of the T_con block 140 and the upper edge side of the liquid crystal panel 100, and the Vcom line having a predetermined width as shown on the FPC 132 ( 130) is mounted. The Vcom circuit unit 142 is a circuit unit that generates a Vcom signal. The signal generated by the Vcom circuit unit 142 is transmitted to the upper edge side of the outer portion of the liquid crystal panel 100 through the Vcom line 130.

As shown in FIG. 6, a Vcom signal is applied to the lower edge of the liquid crystal panel 100 via a COF in which the source IC 116 is installed or a separate signal transfer medium from the T_com block 140. Form. In addition, a short point 135 is formed at the upper edge portion of the liquid crystal panel 100 by the Vcom line 130 which is bypassed and connected through the FPC 132. In the present invention, the short point 135 means a connection point of the Vcom line 130 formed on the outer side of the TFT substrate 110, and the short point 135 may be connected to the color filter 120 side.

Preferably, the FPC 132 mounted with the Vcom line 130 is installed by bypassing the rear surface of the BLU 180. This is to prevent the shadow from being generated because the light generated in the BLU 180 is blocked by the FPC 132 when the FPC 132 passes through the front of the BLU 180.

As such, since the Vcom line 130 is mounted on a separate medium and installed by bypassing the liquid crystal panel 100 to the outside of the liquid crystal panel 100, the Vcom line is disposed in the BM 105 region as compared with the conventional Vcom line in the BM region. There is no need to form 130. Therefore, the width of the BM 105 of the outer line can be designed more slim.

In addition, as the Vcom line 130 is mounted on the FPC 132, copper (Cu) may be used as a material for forming the Vcom line 130, and the thickness and width of the Vcom line 130 may be limited. You do not need to receive. Therefore, little increase in resistance due to the length of the Vcom line 130 occurs, which means that the potentials of the shortpoints 135 are ideally matched.

Although not shown, driving lines such as power lines and signal lines of the gate IC 112 may be mounted on the FPC 132 on which the Vcom line 130 is mounted. As such, when the driving line of the gate IC 112 is mounted on the FPC, wiring through the BM 105 or the dummy region 150 may be removed, which may be a factor in implementing a narrow bezel. .

7 shows another configuration of the liquid crystal panel according to the present invention. As shown, the Vcom line 130 may be mounted in the case of a COF in which the gate IC 112 is mounted. Referring to FIG. 7, the Vcom line 130 is transferred from the Vcom circuit unit 142 of the T_con block 140 to the first COF on the right through the FPC 132. Of course, the Vcom line 130 may be transferred to the COF side of the first gate IC 112 through the glass of the liquid crystal panel 100.

Vcom line 130 is mounted bypassing the gate IC 112 in the COF, and is transferred to the next COF through the BM 105 or the glass at the right edge portion. As such, if the Vcom line 130 is delivered using the COF mounted with the gate IC 112, the Vcom line 130 may be installed externally without using or using a separate transmission medium. You can expect the effect.

FIG. 8 is a plan view showing still another configuration example of the liquid crystal panel according to the present invention, and illustrates an example in which ASGs (not shown) are mounted at both edge portions of the liquid crystal panel 100. As shown in FIG. 8, as a means for driving the gate line of the TFT disposed on the TFT substrate 110, an ASG may be mounted instead of the gate IC 112. The ASG is formed on the TFT substrate 110, and can be formed to overlap with the area where the yarn is applied on the outer side of the liquid crystal panel 100, which is advantageous to make the width of the BM 105 more slim.

In FIG. 8, the ASG is mounted on the left and right edge portions of the TFT substrate 110. In FIG. 8, the ASG is mounted in the areas indicated by “BLOCK-A” and “BLOCK-B”. As in the embodiment of FIG. 6, in this case, the Vcom line 130 is mounted on the FPC 132, bypasses the liquid crystal panel 100, and is connected to the edge side of the liquid crystal panel 100. Then, the short point 135 is formed on the upper edge side of the liquid crystal panel 100.

9 and 10 are perspective and cross-sectional views illustrating an example in which the liquid crystal panel 100 is combined with the BLU 180. Referring to this, the BLU 180 of the present invention is laminated to the lower chassis 200, the luminaire 202 installed at the bottom of the lower chassis 200, and the upper end of the side wall 208 of the lower chassis 200. The optical sheets 206, which are installed on the optical sheet 206, are coupled to the mold 210 for mounting the liquid crystal panel 100, and to the upper portion of the liquid crystal panel 100. It consists of an upper chassis 220 to fix the position.

The lower chassis 200 has sidewalls 208 having a sufficient thickness. Preferably, the side wall 208 of the lower chassis 200 has a thickness corresponding to the width of the BM 105 of the liquid crystal panel 100. As shown, a plurality of fixing protrusions 231 are installed in the upper end of the side wall 208 of the lower chassis 200. In addition, a plurality of seating portions 241 are formed on the outer surface of the side wall 208 of the lower chassis 200 to which the coupling portion 243 of the mold 210 to be described later is mounted. The seating portion 241 is formed to be concave on the outer surface of the side wall 208, the locking protrusion 242 protruding outward is formed on the seating portion 241.

At the bottom of the lower chassis 200, commonly known lighting means 202 such as CCFLs and LEDs are installed. If an LED is selected as the luminaire 202, the LEDs are preferably installed over the entire interior of the lower chassis 200. However, since LEDs are relatively expensive, a CCFL as shown is usually installed.

When the CCFL is installed as the luminaire 202, sockets 203 for mounting the CCFL are installed at both ends of the lower chassis 200, as shown. In the liquid crystal panel having a BM having a sufficient width as in the related art, the socket 203 mounting area as described above did not cause a decrease in the light uniformity of the BLU 180. However, with respect to the liquid crystal panel 100 having the narrow BM 105 as in the present invention, there is a fear that a dark portion outside the liquid crystal panel 100 is generated in the region where the socket 203 is provided.

In order to solve this problem, the additional lighting means 205 is installed in the lower chassis 200 to cover the area where the socket 203 is installed. Since the area in which the additional luminaire 205 is installed is relatively local, the additional luminaire 205 can be installed as an LED. If the CCFL is installed as the additional luminaire 205, the CCFL of the additional luminaire 205 is preferably laid in a direction crossing the CCFL of the luminaire 202 described above.

On the other hand, even when the lighting means 202, such as LED, is provided in the bottom of the lower chassis 200, the inside of the side wall 208 of the lower chassis 200 is a non-light emitting area, whereby the liquid crystal panel ( A dark portion may be generated at the active region edge portion of 100. In order to prevent this, as shown in the cross-sectional view of FIG. 11, additional lighting means 205 may be installed inside the side wall 208 of the lower chassis 200. In addition, although not shown, a light guide plate may be installed on the inner side surface of the side wall 208 of the lower chassis 200. The light guide plate is incident on the thickness surface of the light means 202 installed in the bottom of the lower chassis 200, so that the inner surface of the side wall 208 of the lower chassis 200 has a surface-emitting effect. As such, when the additional luminaire 205 or the light guide plate is installed inside the side wall 208 of the lower chassis 200, the entire inner area of the lower chassis 200 is emitted, so that dark portions are generated at the edges of the liquid crystal panel 100. Can be suppressed more effectively.

An insulating plate 204 and a plurality of optical sheets 206 are stacked on an upper end of the side wall 208 of the lower chassis 200. A plurality of through holes 232 are formed at the periphery of the heat insulating plate 204 and the optical sheet 206 to correspond to the fixing protrusion 231 of the upper end of the side wall 208. Accordingly, as the through hole 232 of the heat insulating plate 204 and the optical sheet 206 is inserted into the fixing protrusion 231, the heat insulating plate 204 and the optical sheet 206 may be fixed in place.

The heat insulating plate 204 is to block the heat generated from the lighting means (202, 205) to the liquid crystal panel 100, it is selected as a relatively thick light-transmitting heat insulating material. If a separate heat insulating means is provided or the lighting means 202 or 205 for which no heat insulating means is provided, the heat insulating plate 204 may be excluded. The optical sheets 206 include a diffusion sheet, a prism, a brightness enhancement film (BEF), and the like, for diffusing light generated by the lighting means 202 and 205.

The mold 210 is configured to fix the optical sheets 206 and to stably mount the liquid crystal panel 100. The mold 210 may be formed of a rubber material or have a rubber attached to an upper surface thereof. The mold 210 also includes a through hole 232 inserted into and coupled to the fixing protrusion 231 of the lower chassis sidewall 208 along the perimeter. In addition, the coupling portion 243 coupled to the seating portion 241 of the lower chassis 200 protrudes downward from the circumference of the mold 210, and the locking portion (241) of the seating portion 241 is attached to the coupling portion 243. The engaging hole 244 is engaged with the 242 is formed. Therefore, when the mold 210 is coupled to the lower chassis 200, the heat insulation plate 204 and the optical sheets 206 are fixedly coupled.

The upper chassis 220 is coupled to the upper portion of the liquid crystal panel 100 to fix the position of the liquid crystal panel 100. Although not shown, fastening means such as bolts on the side wall 208 of the lower chassis 200. Is fastened.

Components shown in FIG. 9 are combined as shown in FIG. 10. Referring to the cross-sectional view of FIG. 10, the front surface of the mold 210 and the upper chassis 220 has a width that does not protrude into the side wall 208 of the lower chassis 200. That is, the front part of the upper chassis 220 has a width (width shown by W2 in FIG. 10) to cover the BM 105 outside the liquid crystal panel 100. Therefore, the width of the front portion of the bezel constituting the exterior of the LCD may be more narrowly designed corresponding to the width of the front portion of the upper chassis 220. Such a narrow bezel is intended for the present invention, which will improve the continuity of the screen when the multi-screen configuration of the tiled form.

If the narrow bezel is implemented as in the present invention, the area in which the upper chassis 220 presses the circumference of the liquid crystal panel 100 is inevitably narrowed, and thus, the fixing structure of the liquid crystal panel 100 may be weak. . When the fixing structure of the liquid crystal panel 100 becomes weak, a phenomenon in which the central portion of the liquid crystal panel 100 protrudes to the front surface may occur, and thus the liquid crystal panel 100 may be separated from the fixing position.

The present invention provides a means for compensating for the weakening of the fixing structure of the liquid crystal panel 100 as described above.

Referring to the side view of FIG. 12, it can be seen that sidewalls 208 of the long side portions that face each other among the sidewalls 208 of the lower chassis 200 are bent to the rear side. In the state where the long side wall 208 of the lower chassis 200 is bent to the rear side, the heat insulation plate 204 and the optical sheets 206 stacked on the upper end of the side chassis 208 are formed on the long side wall 208 of the lower chassis 200. ) Will be stacked in a bent state to correspond to the formation. In addition, the long sides of the mold 210 and the upper chassis 220 also have a bent side. Therefore, the liquid crystal panel 100 is also installed in a bent state toward the rear side as shown.

As such, as the liquid crystal panel 100 is installed in a state of being bent to the rear side, the liquid crystal panel 100 is pressed and fixed to the upper side of the sidewall 208 of the lower chassis 200, and the edge portion fixing structure of the liquid crystal panel 100 is fixed. Even if vulnerable, the phenomenon that the central portion of the liquid crystal panel 100 protrudes to the front side can be prevented. At this time, since the tiled type multi-screen of the present invention is normally used for viewing at a remote location, even when the liquid crystal panel 100 is slightly bent to the rear side, in case of a large-screen LCD, visibility may not be deteriorated to a problem. will be.

13 illustrates another method for more firmly positioning the liquid crystal panel 100. Referring to FIG. 13, a support bar 215 is installed at an upper end of the lower chassis 200 to cross the side wall 208 of the long side portion. As shown, the support bar 215 supports the back side of the optical sheets 206 and the liquid crystal panel 100. That is, the support bar 215 supports the rear side of the central portion of the liquid crystal panel 100, thereby allowing the liquid crystal panel 100 to be more firmly positioned and prevented from being recessed to the rear side. Although not shown, the embodiment of FIG. 12 and the embodiment of FIG. 13 may be configured together. For example, as shown in FIG. 12, the liquid crystal panel 100 is bent to the rear side, and the back side of the liquid crystal panel 100 may be supported by the support bar 215 as shown in FIG. 13.

The support bar 215 is useful for supporting the liquid crystal panel 100 more firmly, but may act as a factor for generating a dark portion in the central portion of the liquid crystal panel 100. Such dark spots in large screen LCDs can sometimes cause significant problems. As shown in FIG. 13, the light guide plate 252 is installed at the upper end of the support bar 215 in order to prevent the dark part caused by the support bar 215. The light guide plate 252 is incident to the light of the lighting means 202 through the thickness surface, and emits light to the upper side of the support bar 215, the dark portion in the central portion of the liquid crystal panel 100 by the support bar 215 To prevent it from happening.

14 to 17 show another embodiment of the present invention. Referring to FIG. 14, in the liquid crystal panel 100, a BM 107 may be formed on a cross line crossing the active area in which the actual image is displayed in the longitudinal direction or the transverse direction. In the illustrated example, the BM 107 is formed in the longitudinal direction to cross the central portion of the liquid crystal panel 100, but the BM 107 of the cross line may be formed in the transverse direction or may be formed in two or more. have. In the BM 107 region of the cross line, a gate IC 112 for applying a gate signal to a gate line of both divided screens may be mounted as shown.

As a method of mounting the gate IC 112 on the BM 107 of the cross line, when the TFT substrate 110 and the color filter 120 are bonded to form the liquid crystal panel 100, the color filter 120 The cross line may be partially removed through a laser cutting facility and the like, and the gate IC 112 may be bonded to the removed location. In this embodiment, gate IC 112 may be replaced with an ASG. If an ASG is mounted, this scribing process is unnecessary.

As such, the BM 107 is formed to cross the liquid crystal panel 100, and drive ICs are mounted in the area of the BM 107, thereby minimizing the outer BM 105 of the liquid crystal panel 100.

In addition, as shown in FIG. 15, drive ICs are mounted on the BM 107 of the cross line, and the Vcom line 130 is external to the liquid crystal panel 100 through the FPC 132 as in the embodiment of FIG. 6. Can be installed on In this case, the BM 105 outside the liquid crystal panel 100 may be designed with a minimum width.

As shown in FIGS. 14 and 15, when the BM 107 is formed on the cross line of the liquid crystal panel 100, the width of the BM 105 outside the liquid crystal panel 100 can be minimized. The seal 125 may be coated on the cross line of the liquid crystal panel 100 to further improve the bonding force between the TFT substrate 110 and the color filter 120.

16 and 17 are a perspective view and a cross-sectional view illustrating an example in which the liquid crystal panel 100 as in the embodiment of FIGS. 14 and 15 is combined with the BLU 180. The BLU 180 shown in the perspective view of FIG. 16 is, as described with reference to FIG. 9, the lower chassis 200, the lighting means 202, 205, the insulation plate 204, the optical sheet 206, the mold 210. The upper chassis 220 is configured, and descriptions of the respective components are also the same as described above, and thus redundant descriptions are omitted.

However, as shown in FIG. 16, when the BM 107 is formed on the cross line of the liquid crystal panel 100, since this area is an area where no image is displayed, the lower chassis 200 and the upper chassis 220 may be formed. A configuration for supporting the liquid crystal panel 100 may be installed.

As shown in FIG. 16, the lower chassis 200 supports the rear surface of the optical sheet 206 and the liquid crystal panel 100 at a position corresponding to the BM 107 area of the cross line of the liquid crystal panel 100. Bar 215 is installed transversely. In addition, the support bar 225 crossing the upper chassis 200 is also installed in the upper chassis 200 in the same manner.

As shown in the cross-sectional view of FIG. 17, the support bars 215 and 225 support the rear and front center portions of the liquid crystal panel 100, respectively. Accordingly, since the front and rear portions of the liquid crystal panel 100 are supported by the support bars 215 and 225, the liquid crystal panel 100 may be prevented from protruding toward the front side or recessed toward the rear side. 100) can be more reliably prevented from escaping from the position.

If the plurality of cross lines BM 107 are formed on the liquid crystal panel 100, the lower chassis 200 and the upper chassis 220 may include a plurality of support bars 215 and 225. The liquid crystal panel 100 will be more firmly supported.

On the other hand, although not shown, in the present embodiment, as shown in the cross-sectional view of Figure 11, the additional lighting means 205 may be installed inside the side wall 208 of the lower chassis 200. In addition, as shown in the cross-sectional view of FIG. 12, the long side portion sidewall 208 of the lower chassis 200 and the long side portion of the mold 210 and the upper chassis 220 are formed to be bent toward the rear side, so that the liquid crystal panel 100 is formed. It may be installed in a state bent to the back side.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

1 is an exploded perspective view showing a laminated structure of a general LCD

2 is a plan view showing a configuration example of a conventional liquid crystal panel

3 is a plan view showing another configuration example of a conventional liquid crystal panel

4 is a cross-sectional view showing the structure of one side edge portion of FIG.

Figure 5 is a cross-sectional view of an embodiment of a conventional LCD

6 is a plan view showing a configuration example of a liquid crystal panel according to the present invention;

7 is a plan view showing another configuration example of the liquid crystal panel according to the present invention;

8 is a plan view showing another example of the configuration of the liquid crystal panel according to the present invention

9 is an exploded perspective view showing an embodiment of the LCD according to the present invention;

10 is a cross-sectional view showing a coupling state of FIG.

11 is a cross-sectional view showing another installation example of the additional lighting means in FIG.

12 is a side view showing another embodiment of FIG.

13 is a cross-sectional view showing another embodiment of FIG.

14 is a plan view showing another configuration example of a liquid crystal panel according to the present invention;

15 is a plan view showing another configuration example of a liquid crystal panel according to the present invention;

16 is an exploded perspective view showing another embodiment of the LCD according to the present invention;

17 is a cross-sectional view showing a coupling state of FIG.

<Explanation of symbols for the main parts of the drawings>

100: liquid crystal panel 105: black matrix

107: Black matrix 110: TFT substrate

112: gate IC 116: source IC

120: color filter 130: Vcom line

132: FPC 135: Short Point

140: T_con block 142: Vcom circuit part

150: dummy area 152: inspection pad

180: backlight unit 200: lower chassis

202: lighting means 203: socket

204: insulation plate 205: lighting means

206: optical sheet 208: side wall (208)

210: mold 215: support bar

220: upper chassis 225: support bar

231: fixing protrusion 232: through hole

241 seating part 242: locking protrusion

243: fastening portion 244: locking holes

252: light guide plate

Claims (22)

In the liquid crystal display device in which the TFT substrate 110 and the color filter 120 are bonded to form a liquid crystal panel 100, and a backlight unit 180 is provided on the rear surface of the liquid crystal panel 100. The liquid crystal panel 100 is provided with a Vcom line 130 for applying a reference voltage to the outside of the liquid crystal panel 100 or via a COF in which the gate IC 112 is mounted. The backlight unit 180 includes a lower chassis 200 having a lighting unit 202 installed therein, a plurality of optical sheets 206 stacked on top of sidewalls 208 of the lower chassis 200, and The mold 210 is installed on the optical sheet 206 to fix the optical sheets 206, and seats the liquid crystal panel 100. The liquid crystal panel 100 mounted on the mold 210 is positioned. It is configured to include an upper chassis 220 coupled to the upper portion of the liquid crystal panel 100 to be fixed, A plurality of fixing protrusions 231 are installed at an upper end of the side wall 208 of the lower chassis 200, and a plurality of fixing protrusions 231 are formed at the periphery of the optical sheet 206 and the mold 210. Liquid crystal display having a narrow bezel, characterized in that the through-hole 232 is formed. delete The method of claim 1, And a front portion of the mold 210 and the upper chassis 220 has a width that does not protrude into the sidewall 208 of the lower chassis 200. The method of claim 1, The luminaire 202 is a CCFL installed in the bottom of the lower chassis 200 along the length direction, and the additional luminaire 205 is installed inside the lower chassis 200 to cover the socket portion of the CCFL. A liquid crystal display device having a narrow bezel. The method of claim 4, wherein The additional lighting means (205) is a liquid crystal display having a narrow bezel, characterized in that the CCFL is installed in a direction crossing the CCFL. The method of claim 4, wherein And said additional lighting means (205) is a narrow bezel. The method of claim 1, Liquid crystal display having a narrow bezel, characterized in that the additional lighting means (205) is installed inside the side wall (208) of the lower chassis (200). The method of claim 1, And a light guide plate on the sidewall 208 of the lower chassis 200 to receive the light from the lighting means 202 and to surface-emit the light from the inner sidewall of the sidewall 208. The method of claim 1, The side walls 208 of the long sides facing each other among the side walls 208 of the lower chassis 200 are formed to be bent to the rear side, and correspondingly, the long sides of the mold 210 and the upper chassis 220 are also bent to the rear side. And a narrow bezel, wherein the optical sheets (206) and the liquid crystal panel (100) are stacked to be bent in a rear side. The method of claim 1, Narrow, characterized in that the support bar 215 is installed across the side wall 208 of the long side to support the rear side of the optical sheet 206 and the liquid crystal panel 100 on the upper end of the lower chassis 200. A liquid crystal display device having a bezel. The method of claim 10, And a light guide plate (252) installed to cover the upper end of the support bar (215). In the liquid crystal display device in which the TFT substrate 110 and the color filter 120 are bonded to form a liquid crystal panel 100, and a backlight unit 180 is provided on the rear surface of the liquid crystal panel 100. In the liquid crystal panel 100, a black matrix 107 is formed on at least one cross line crossing the active area in which the screen is displayed in the longitudinal direction or the horizontal direction, and a gate IC is formed in the area where the black matrix 107 is formed. (112) or amorphous silicon gate (ASG) circuitry is mounted, The backlight unit 180 includes a lower chassis 200 having a lighting unit 202 installed therein, a plurality of optical sheets 206 stacked on top of sidewalls 208 of the lower chassis 200, and The mold 210 is installed on the optical sheet 206 to fix the optical sheets 206, and seats the liquid crystal panel 100. The liquid crystal panel 100 mounted on the mold 210 is positioned. It is configured to include an upper chassis 220 coupled to the upper portion of the liquid crystal panel 100 to be fixed, A plurality of fixing protrusions 231 are installed at an upper end of the side wall 208 of the lower chassis 200, and a plurality of fixing protrusions 231 are formed at the periphery of the optical sheet 206 and the mold 210. Liquid crystal display having a narrow bezel, characterized in that the through-hole 232 is formed. delete The method of claim 12, And a front portion of the mold 210 and the upper chassis 220 has a width that does not protrude into the sidewall 208 of the lower chassis 200. The method of claim 12, The luminaire 202 is a CCFL installed in the bottom of the lower chassis 200 along the length direction, and the additional luminaire 205 is installed inside the lower chassis 200 to cover the socket portion of the CCFL. A liquid crystal display device having a narrow bezel. The method of claim 15, The additional lighting means (205) is a liquid crystal display having a narrow bezel, characterized in that the CCFL is installed in a direction crossing the CCFL. The method of claim 15, And said additional lighting means (205) is a narrow bezel. The method of claim 12, Liquid crystal display having a narrow bezel, characterized in that the additional lighting means (205) is installed inside the side wall (208) of the lower chassis (200). The method of claim 12, And a light guide plate on the sidewall 208 of the lower chassis 200 to receive the light from the lighting means 202 and to surface-emit the light from the inner sidewall of the sidewall 208. The method of claim 12, The long side walls 208 of the side walls 208 of the lower chassis 200 which face each other are formed to be bent to the rear side, and correspondingly, the long sides of the mold 210 and the upper chassis 220 are also bent to the rear side. And a narrow bezel, wherein the optical sheets (206) and the liquid crystal panel (100) are stacked to be bent in a rear side. The method of claim 12, The lower chassis 200 includes optical sheets 206 and a support bar 215 for supporting the back side of the liquid crystal panel 100 corresponding to the black matrix 107 area of the cross line of the liquid crystal panel 100. A liquid crystal display device having a narrow bezel, characterized in that the installation. The method of claim 12 or 21, The upper chassis 220 has an optical sheet 206 and a support bar 225 for supporting the front side of the liquid crystal panel 100 corresponding to the black matrix 107 area of the cross line of the liquid crystal panel 100. A liquid crystal display device having a narrow bezel, characterized in that the installation.

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