KR20110067881A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display device is provided to make a display part into a round shape by hiding some part of pixels in the outer most part of an active region. CONSTITUTION: A liquid crystal display device comprises a liquid crystal display panel which is divided into an active region for displaying an image and a non-display region for not displaying an image, a gate driving unit which supplies scan signal to a plurality of gate lines, and a data driving unit which drives a plurality of data lines. The liquid crystal display panel includes a plurality of pixels which are defined with the gate lines and the data lines. A black matrix(215) hides pixels which are arranged outer most part of the active region.

Description

Liquid crystal display device

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 in which the outermost portion of the active area is displayed close to a circular structure in a non-square type liquid crystal display device.

Display devices used in computers, monitors, and TVs include organic light emitting displays (OLEDs), vacuum fluorescent displays (VFDs), and electroluminescent devices (FEDs) that emit light by themselves. field emission displays (PDPs), plasma display panels (PDPs), and the like, and liquid crystal displays (LCDs) that do not emit light by themselves and require light sources.

A general liquid crystal display device includes two substrates having a field generating electrode and a liquid crystal layer having dielectric anisotropy formed therebetween. A voltage is applied to the field generating electrode to generate an electric field in the liquid crystal layer, and the voltage is changed to adjust the intensity of the electric field to adjust the transmittance of light passing through the liquid crystal layer to display a desired image.

The liquid crystal display includes a data driver which receives image data from an external source and generates and supplies a data signal of a corresponding pixel to a data line of the liquid crystal display panel, and generates a gate signal to drive pixels of the liquid crystal display panel by one line. And a gate driver for supplying light and a backlight unit disposed on a rear surface of the liquid crystal display panel to provide light.

A typical small liquid crystal display has a rectangular display screen. Therefore, the shape of the liquid crystal display panel is also rectangular.

Recently, a liquid crystal display device is used as a display device of various fields such as a watch or a dashboard of a vehicle, and a circular display screen is required. Accordingly, the liquid crystal display panel has a circular structure.

In the liquid crystal display having the circular structure, the outermost part of the active area, which is a boundary between the active area and the non-display area, also has a circular shape. Pixels are also formed at the outermost part of the active area, and a portion of the pixels is covered by the black matrix to display the outermost part of the active area.

In this case, the black matrix covers a portion of the pixels positioned at the outermost portion of the active area with the same size. As a result, pixels positioned at the outermost portion of the circular active area are concealed by a black matrix to be recognized as a staircase. As a result, the user recognizes the outermost part of the active area as an angled step instead of a curve. In addition, since a portion of the pixels positioned at the outermost portion of the circular active region is covered in a stepped shape with the black matrix, the representation of the curve is reduced.

The present invention is to solve the above problems, part or all of the pixels provided in the outermost portion of the active area of the circular structure is covered with a black matrix differently depending on the area where the pixels are located to It is an object of the present invention to provide a liquid crystal display that allows the outermost portion to be displayed close to a circular structure.

An LCD according to an exemplary embodiment of the present invention includes a liquid crystal display panel including a plurality of pixels defined by a plurality of gate lines and data lines, and divided into an active region displaying an image and a non-display region not displaying an image. And a gate driver providing scan signals to the plurality of gate lines and a data driver driving the plurality of data lines, wherein the gate driver is provided at an outermost portion of the active area that is a boundary between the active area and the non-display area. The pixels are differently covered by the black matrix depending on the region where they are located.

In the liquid crystal display according to the present invention, a part or all of the pixels included in the outermost part of the active area having a circular structure is covered by a black matrix differently according to the area where the pixels are located, so that the outermost part of the active area has a circular structure. Can be displayed close to

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

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 1, the liquid crystal display according to the exemplary embodiment of the present invention is disposed on the liquid crystal display panel 210 on which an image is displayed and on the rear surface of the liquid crystal display panel 210. And a backlight unit 220 for providing light.

Upper and lower polarizing plates 101 and lower polarizing plates 102 may be attached to upper and lower surfaces of the liquid crystal display panel 210 so that optical axes are perpendicular to each other.

The liquid crystal display panel 210 includes a thin film transistor array substrate, a color filter substrate attached to face the thin film transistor array substrate, and a liquid crystal layer formed between the two substrates.

The thin film transistor array substrate includes a plurality of pixels in a matrix form, and each of the plurality of pixels is insulated from the gate line extending in a first direction and extending in a second direction perpendicular to the first direction. An intersecting data line and a pixel electrode are provided. In addition, a thin film transistor (TFT) is formed in each pixel and is connected to the gate line, the data line, and the pixel electrode.

An RGB pixel as a color filter is formed on the color filter substrate by a thin film process, and a common electrode facing the pixel electrode is formed. Therefore, the liquid crystal layer is arranged by voltages applied to the pixel electrode and the common electrode, thereby adjusting the transmittance of light provided from the backlight unit 220.

The liquid crystal display panel 210 has a circular shape with respect to the display surface and has a rectangular structure protruding on one side.

The backlight unit 220 positioned below the liquid crystal display panel 210 may include a support main 280 made of a mold having an upper surface, a light source unit 250 disposed on one side of the support main 280, and And a light guide plate 260 disposed in parallel with the light source unit 250, and optical sheets 230 disposed on the light guide plate 260.

The optical sheets 230 diffuse and condense the light incident from the light guide plate 260 and emit the light toward the liquid crystal display panel 210. The optical sheets 230 are formed in a round shape.

The light guide plate 260 converts point light into surface light, and converts point light incident from the light source unit 250 disposed on one side of the support main 280 into surface light to the liquid crystal display panel 210. Guide. At this time, the light guide plate 260 is formed in a circular shape.

The light source unit 250 includes a flexible printed circuit board (FPC) 253 and a plurality of light emitting diodes 251 mounted on a lower surface of the flexible circuit board 253. The flexible circuit board 253 is a circuit board on which a complicated circuit is formed on a flexible insulating film, and is a substrate using a heat resistant plastic film such as PET (polyester) or PI (polyimide).

The support main 280 is formed of a mold having an upper surface opened, and all regions except the region corresponding to the light source unit 250 have a circular shape.

The support main 280 accommodates the light guide plate 260, the optical sheets 230, and the light source unit 250 therein, and a plurality of support mains 280 corresponding to the light source unit 250. A plurality of receiving grooves 251a in which the light emitting diodes 251 are accommodated are formed.

The light blocking tape 200 is provided on the backlight unit 220 having such a structure.

The light blocking tape 220 corresponds to an area corresponding to the light source unit 250 of the backlight unit 220 and an edge of the support main 280, and supports the optical sheets 230 and the light source unit 250 to the support main ( 280).

In addition, the light blocking tape 200 serves to fix the backlight unit 220 and the liquid crystal display panel 210 by applying an adhesive to both surfaces thereof, and the entire light blocking tape 200 is formed of black color from the backlight unit 220. It prevents the emitted light from leaking out.

The lower polarizing plate 102 that transmits only specific light among light incident from the backlight unit 220 is attached to the lower surface of the liquid crystal display panel 210. In addition, an upper polarizer 101 is attached to an upper surface of the liquid crystal display panel 210 to transmit only a specific light of light traveling in an upper direction of the liquid crystal display panel 210.

The liquid crystal display panel 210 is divided into an active area displaying an image and a non-display area positioned at an edge of the active area and not displaying an image. A gate driver for providing a scan signal to the gate line of the liquid crystal display panel 210 may be located in the non-display area.

FIG. 2 is an enlarged view of a portion of the liquid crystal display panel of FIG. 1.

As shown in FIGS. 1 and 2, the liquid crystal display panel 210 is positioned at an edge of the active area A / A where the image is displayed and the active area A / A, and covered by the black matrix 215. The space is divided into non-display areas.

A plurality of pixels P is formed in the active area A / A and the non-display area. Each pixel P includes a color filter 225 including red (R), green (G), and blue (B) filters 225a, 225b, and 225c.

The liquid crystal display panel 210 is divided into first to sixth pixel parts P / P1 to P / P6 in the vertical direction. Each of the pixel units P / P1 to P / P6 includes first to fifth pixels P1 to P5. In this case, P / P of the pixel units P / P1 to P / P6 means pixel portion.

Each of the first to fifth pixels P1 to P5 includes first to third sub pixels corresponding to the color filters 225a, 225b, and 225c of red (R), green (G), and blue (B). Can be.

The pixels P positioned at the outermost portions of the active area A / A are covered by the black matrix 215. In detail, the pixels P positioned at the boundary between the active area A / A and the non-display area positioned outside the active area A / A are covered by the black matrix 215.

In this case, the degree covered by the black matrix B is different for each pixel P included in the first to sixth pixel units P / P1 to P / P6.

For example, the pixels P included in the first to sixth pixel units P / P1 to P / P6 are covered by the black matrix 215 as follows.

In the case of the first pixel portion P / P1, all of the first to fourth pixels P1 to P4 are covered with the black matrix 215. In the second pixel portion P / P2, both the first and second pixels P1 and P2 are covered with the black matrix 215, and about two thirds of the third pixels P3 may have the black matrix ( 215 and about 1/5 of the fourth pixel P4 is covered by the black matrix 215.

In the third pixel portion P / P3, all of the first pixels P1 are covered by the black matrix 215, and in the case of the second pixels P2, about 3/4 is covered by the black matrix 215. have. In the fourth pixel portion P / P4, only 4/5 of the first pixel P1 is covered with the black matrix 215. The first to fifth pixels P1 to P5 included in the fifth and sixth pixel units P / P5 and P / P6 are not covered with the black matrix 215.

As such, the pixels P positioned at the outermost portions of the active regions A / A are covered with the black matrix 215 differently according to the regions where the pixels P are positioned. A portion of the pixels P positioned at the outermost portion of the active area A / A may be covered by the black matrix 215 in different areas to be displayed as a circular active area A / A. have.

If each of the first to third subpixels corresponding to the R, G, and B color filters 225a, 225b, and 225c included in the pixel P is differently covered by the black matrix 215, the active The liquid crystal characteristic of the outermost part of the area A / A is reduced. Therefore, the black matrix 215 is covered in units of one pixel P including the first to third subpixels.

As described above, in the liquid crystal display device according to the present invention, in the liquid crystal display panel having a circular structure, some or all of the pixels positioned at the boundary between the active area for displaying an image and the non-display area are positioned. Different regions may be covered by a black matrix so that the active region of the liquid crystal display panel may be represented in a circular shape.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 2 is an enlarged view of a portion of the liquid crystal display panel of FIG. 1. FIG.

<Brief description of the main parts of the drawing>

102: lower polarizer 103: upper polarizer

200: light shielding tape 201: liquid crystal display panel

215: black matrix 220: backlight unit

230: optical sheet 250: light source unit

251: light emitting diode 253: flexible circuit board

260: Light guide plate 280: Support main

Claims (3)

A liquid crystal display panel including a plurality of pixels defined by a plurality of gate lines and data lines, and divided into an active area for displaying an image and a non-display area for not displaying an image; A gate driver providing scan signals to the plurality of gate lines; And And a data driver for driving the plurality of data lines. And pixels disposed in the outermost part of the active area, which is a boundary between the active area and the non-display area, are covered with a black matrix according to the area where the pixels are located. The method according to claim 1, The liquid crystal display panel has a circular structure. The method according to claim 1, And the black matrix covers a pixel provided at an outermost portion of the active area in units of one pixel including first to third subpixels.

Images