KR20200075546A - Liquid crystal panel - Google Patents

Abstract

According to the liquid crystal display panel of the present invention, a plurality of pixels are arranged in a row direction and a column direction on a first substrate corresponding to a display area. A second substrate faces the first substrate and is coupled to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate. A plurality of color filters are disposed on the first substrate or the second substrate, and the plurality of color filters overlap a plurality of pixels. An overcoat layer covers the plurality of color filters. A pixel group including predetermined pixels arranged in a row direction or a column direction adjacent to a boundary line defining a rounded area of the display area is defined. The aperture ratio of the pixels in the pixel group increases as the distance from the boundary line increases, and an opening for accommodating the overcoat layer is formed in the color filter overlapping the pixels arranged at the outermost side adjacent to the boundary line in the pixel group. Therefore, the liquid crystal display panel with improved display quality in a round-shaped display area is provided.

Description

Liquid Crystal Display Panel{LIQUID CRYSTAL PANEL}

The present invention relates to a liquid crystal display panel, and more particularly, to a liquid crystal display panel having a round shape display area.

The liquid crystal display includes a liquid crystal display panel and a backlight assembly, the backlight assembly outputs light, and the liquid crystal display panel displays an image using light output from the backlight assembly. The liquid crystal display panel displays an image through the display area, and the liquid crystal display panel includes a plurality of pixels arranged on a substrate corresponding to the display area.

Recently, liquid crystal display panels of various designs have been developed. For example, in a liquid crystal display panel applied to a smart phone, in order to facilitate the design of the displayed image, the edge of the display area where the image is displayed has been developed in a round shape.

An object of the present invention is to provide a liquid crystal display panel with improved display quality in a round shape display area.

The liquid crystal display panel for achieving the above object of the present invention includes a first substrate, a plurality of pixels, a second substrate, a liquid crystal layer, a plurality of color filters and an overcoat layer. The plurality of pixels are arranged in a row direction and a column direction on the first substrate corresponding to the display area. The second substrate is coupled to the first substrate opposite the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The plurality of color filters are disposed on the first substrate or the second substrate, and the plurality of color filters overlap the plurality of pixels. The overcoat layer covers the plurality of color filters.

A pixel group including predetermined pixels arranged in the row direction or the column direction is defined adjacent to a boundary line defining a rounded area of the display area. The aperture ratio of pixels in the pixel group increases as it moves away from the boundary line, and an opening for accommodating the overcoat layer is formed in a color filter superimposed on the outermost pixel adjacent to the boundary line in the pixel group. .

According to an exemplary embodiment of the present invention, a pixel group arranged in a row direction or a column direction is defined adjacent to a boundary line defining a rounded portion of the display area, and the aperture ratio of pixels belonging to the pixel group is further away from the boundary line. Is increased. Therefore, the angular shape of the pixels adjacent to the boundary line is blurred and the aliasing phenomenon can be reduced.

In addition, an opening for accommodating the overcoat layer is formed in the color filter formed in the outermost pixel closest to the boundary line among the plurality of pixels belonging to the pixel group. Therefore, in order to reduce the aperture ratio of the outermost pixel, even if the volume of the light shielding layer formed in the outermost pixel is larger than the volume of the light shielding layer formed in the peripheral pixel, the outermost pixel corresponds to the increased volume of the light shielding layer in the outermost pixel. An opening may be formed in the formed color filter.

Accordingly, since the difference between the sum of the volume of the light-shielding layer formed in the outermost pixel and the volume of the color filter and the sum of the volume of the light-shielding layer formed in the surrounding pixel and the volume of the color filter can be minimized, the outermost pixel and its surrounding pixels Steps are prevented from occurring in the overcoat layer formed in a batch, so that the size of the cell gap can be uniform, and accordingly, an effect of improving the display quality of the liquid crystal display panel occurs.

1 is a plan view of a liquid crystal display device according to an exemplary embodiment of the present invention.
FIG. 2 is an exploded view showing a combined state of some components of the liquid crystal display shown in FIG. 1.
FIG. 3 is an enlarged view of a second auxiliary display area of the liquid crystal display panel shown in FIG. 1.
FIG. 4 is an enlarged view of a first area of the liquid crystal display panel shown in FIG. 3.
FIG. 5A is a plan view showing the structure of the sub-pixel shown in FIG. 4.
5B is a cross-sectional view showing a plane cut along II′ shown in FIG. 5A.
FIG. 6 is an enlarged view of a first pixel group shown in FIG. 4.
7 is an enlarged view of the second pixel group illustrated in FIG. 4.
8 is a cross-sectional view showing a plane cut along II-II` shown in FIG. 7.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, features and effects of the present invention described above may be understood through embodiments related to the drawings. However, the present invention is not limited to the embodiments described herein, and may be applied and modified in various forms. Rather, the embodiments of the present invention to be described later are provided to more clearly clarify the technical idea disclosed by the present invention, and further to sufficiently transmit the technical idea of the present invention to those skilled in the art to which the present invention pertains. Therefore, the scope of the present invention should not be construed as being limited by the embodiments to be described later. On the other hand, the same reference numbers in the following examples and drawings denote the same components.

In addition, terms such as'first' and'second' in the present specification are used for the purpose of distinguishing one component from other components, not limited meaning. In addition, when a part such as a film, a region, or a component is said to be ``above'' or ``on'' another part, not only when it is directly above the other part, but also other films, areas, components, etc. are interposed therebetween. Also includes cases.

1 is a plan view of a liquid crystal display device according to an exemplary embodiment of the present invention, FIG. 2 is an exploded view showing a combined state of some components of the liquid crystal display device of FIG. 1, and FIG. 3 is a liquid crystal display of FIG. 1 This is an enlarged view of the second auxiliary display area of the panel.

1, 2 and 3, the liquid crystal display 500 is a device for displaying an image, and in this embodiment, a smart phone that is one example of the liquid crystal display 500 is illustrated.

The liquid crystal display device 500 includes a liquid crystal display panel 100, a cover window 300 and a module 10. In addition to the above-described components, the liquid crystal display device 500 includes a backlight assembly (not shown), a battery (not shown), and a housing (not shown) coupled with the cover window 300 to output light to the liquid crystal display panel 100 side. And other components such as a main board (not shown) that is electrically connected to the liquid crystal display panel 100, but the present invention is not limited to components other than the liquid crystal display panel 100, and thus the liquid crystal display device ( The structure of the liquid crystal display panel 100 of 500) will be described.

The display area DA and the non-display area NDA are defined in the liquid crystal display panel 100. The liquid crystal display panel 100 includes a plurality of pixels arranged corresponding to the display area DA. In each of the plurality of pixels, a pixel electrode (50 in FIG. 5A) and a common electrode (52 in FIG. 5A) for controlling the orientation of the liquid crystal molecules in the liquid crystal layer are disposed, and the liquid crystal display panel 100 includes a display area ( The image is displayed using light emitted through DA). In addition, the display area DA overlaps the transmission area TA of the cover window 300, and light emitted through the display area DA passes through the transmission area TA to the outside of the cover window 300. Can be output.

The non-display area NDA of the liquid crystal display panel 100 has a shape surrounding the display area DA. A light blocking layer (BM in FIG. 6) may be disposed on the liquid crystal display panel 100 in response to the non-display area NDA. Also, the non-display area NDA may overlap the non-transmission area NTA of the cover window 300.

In this embodiment, a valley VA may be formed at the center of the upper end of the liquid crystal display panel 100. Therefore, the center of the upper end of the display area DA may have a so-called notch shape, which is a recessed shape to correspond to the shape of the valley VA. In other words, compared to a general liquid crystal display panel having a rectangular display area, the display area DA of the liquid crystal display panel 100 according to this embodiment has a more extended shape.

According to the shape of the display area DA of the liquid crystal display panel 100 described above, in this embodiment, the display area DA is the main display area MDA, the first auxiliary display area ADA1 and the second auxiliary display area (ADA2).

The main display area MDA may correspond to a central portion, a left portion, a right portion, a lower portion, and a portion of the upper portion of the liquid crystal display panel 100. The first auxiliary display area ADA1 may correspond to one side of the upper end of the liquid crystal display panel 100, and the second auxiliary display area ADA2 may correspond to the other side of the upper end of the liquid crystal display panel 100. have. Accordingly, the first auxiliary display area ADA1 is located at one side of the center of the top of the main display area MDA, and the second auxiliary display area ADA2 is located at the other side of the center of the top of the main display area MDA. Can be located.

In this embodiment, the valley VA formed on the top of the liquid crystal display panel 100 may have a rounded shape. Therefore, each area of the first auxiliary display area ADA1 and the second auxiliary display area ADA2 adjacent to the valley VA may have a rounded shape. Accordingly, as illustrated in FIG. 3, the first boundary line BL1 defining the second auxiliary display area AD A2 adjacent to the goal VA may be recognized as a curved shape.

In this embodiment, other areas of the display area DA may have a rounded shape. For example, the edge of the second auxiliary display area ADA2 of the display area DA may have a rounded shape, and accordingly, the second boundary line BL2 that defines the edge of the second auxiliary display area ADA2. ) May have a curved shape.

Meanwhile, as illustrated in FIG. 4, the first boundary line BL1 may be defined by a plurality of pixels arranged in a step shape in the second auxiliary display area ADA2. Therefore, as illustrated in FIG. 3, the first boundary line BL1 may be recognized as a curved shape at the user's point of view using the liquid crystal display 500, but is arranged in a stepwise manner as illustrated in FIG. 4. When viewing a plurality of pixels, the first boundary line BL1 may have a step shape.

The cover window 300 covers the liquid crystal display panel 100. In this embodiment, the cover window 300 may be cover glass, and the cover window 300 protects the liquid crystal display panel 100 from external impact. In another embodiment, the cover window 300 may be formed of a plastic material having properties of transmitting light, such as acrylic resin.

A light blocking layer may be disposed on the cover window 300 in correspondence with the non-transmissive area NTA, and the light blocking layer may be formed of a material that blocks light. The non-transmissive area NTA of the cover window 300 may overlap the non-display area NDA of the liquid crystal display panel 100, and the transmissive area TA of the cover window 300 may be of the liquid crystal display panel 100. It may overlap the display area DA.

The module 10 is disposed inside the valley VA formed in the liquid crystal display panel 100. In this embodiment, the module 10 may include a camera 11 and a speaker 12, but the present invention is not limited to the types of elements provided in the module 10.

In addition, the module 10 disposed inside the valley VA formed in the liquid crystal display panel 100 is covered by the cover window 300. In a state in which the liquid crystal display panel 100, the module 10, and the cover window 300 are combined, the first auxiliary display area ADA1 is located on one side of the module 10, and on the other side of the module 10. The second auxiliary display area ADA2 is located. Accordingly, since the first and second auxiliary display areas ADA1 and ADA2 have characteristics related to the above-described location, the first auxiliary display area ADA1 and the second auxiliary display area ADA2 have time, date, and battery. Additional information such as capacity and WiFi status can be displayed.

FIG. 4 is an enlarged view illustrating a first area A1 of the liquid crystal display panel shown in FIG. 3.

3 and 4, a plurality of pixels are arranged in the second auxiliary display area ADA2 of the liquid crystal display panel 100. In addition, as described above, in FIG. 3, the first boundary line (BL1 in FIG. 3) is shown in a curved shape, but in FIG. 4, the first boundary line (BL1 in FIG. 4) is shown in a step shape.

The non-display area NDA and the second auxiliary display area ADA2 of the liquid crystal display panel 100 may be divided by the first boundary line BL1 as a boundary. In this embodiment, a plurality of dummy pixels DPX may be disposed on the liquid crystal display panel 100 along the first boundary line BL1 corresponding to the non-display area NDA. In addition, although not illustrated in FIG. 4, a light blocking layer (not shown) and a sealant (not shown) may be disposed on the liquid crystal display panel 100 in response to the non-display area NDA, and the light blocking layer may emit light. It includes a blocking material, and the sealant is interposed between the first substrate (20 in FIG. 5B) and the second substrate (60 in FIG. 5B) constituting the liquid crystal display panel 100, and the first and second substrates are interposed. Can be combined with each other.

In this embodiment, the liquid crystal display panel 100 includes a plurality of pixels, such as the first pixel PX1, the second pixel PX2, and the third pixel PX3, corresponding to the second auxiliary display area ADA2. . Further, each of the plurality of pixels may include three subpixels SPX, and the three subpixels SPX constituting each pixel may be a red subpixel, a green subpixel, and a blue subpixel.

Hereinafter, the structure of the sub-pixel SPX will be described with reference to FIGS. 5A and 5B.

FIG. 5A is a plan view showing the structure of the sub-pixel shown in FIG. 4, and FIG. 5B is a cross-sectional view showing the cut along the line I-I' shown in FIG. 5A.

5A and 5B, subpixels SPX of a liquid crystal display panel include a first substrate 20, a second substrate 60, a gate line GL, a data line DL, and a driving transistor TR , A pixel electrode 50, a common electrode 52, a liquid crystal layer 70 and an overcoat layer 66.

Each of the first substrate 20 and the second substrate 60 may be a transparent substrate, such as a glass substrate. The gate line GL is disposed on the first substrate 20. The data line DL is insulated from the gate line GL by the gate insulating layer 16 and intersects the gate line GL.

The driving transistor TR includes a gate electrode GE, an active pattern AP, a source electrode SE, and a drain electrode DE. The gate electrode GE is electrically connected to the gate line GL, and the active pattern AP overlaps the gate electrode GE with the gate insulating layer 16 interposed therebetween. The source electrode SE is electrically connected to the data line DL and contacts the active pattern AP. The drain electrode DE is spaced apart from the source electrode SE to contact the active pattern AP, and the drain electrode DE is contacted to the pixel electrode 50 through the contact hole CH.

The insulating layer 40 is disposed on the first substrate 20 to cover the driving transistor TR, and the pixel electrode 50 and the common electrode 52 are spaced apart from each other on the insulating layer 40. In this embodiment, each of the pixel electrode 50 and the common electrode 52 includes branch portions having a plurality of bar shapes, and the branch portions of the pixel electrode 50 and the common electrode 52 are formed on the insulating layer 40. The branch parts of the are alternately arranged spaced apart from each other. Accordingly, a fringe field is generated between the pixel electrode 50 and the common electrode 52 so that the direction of the direction of the liquid crystal molecules in the liquid crystal layer 70 can be adjusted.

The light blocking layer BM may be disposed on the second substrate 60. The light blocking layer BM includes a material blocking light, and the light blocking layer BM is disposed on the second substrate 60 in correspondence with the boundary between the subpixel SPX and other subpixels adjacent to the subpixel SPX. Can be. In addition, since the light-blocking layer BM blocks light, the aperture ratio defined as the ratio of the area through which light passes through the sub-pixel SPX by the area where the light is blocked by the light-blocking layer BM in the sub-pixel SPX ( aperture ratio) can be defined.

In general, the larger the aperture ratio of the sub-pixel SPX, the better the display quality and low-power driving of the liquid crystal display panel 100 may be, but in the exemplary embodiment of the present invention, the first boundary line (BL1 in FIG. ), the aperture ratios of the plurality of pixels of the first pixel group (PXG1 of FIG. 4) may be different from each other in order to reduce the aliasing phenomenon recognized as a step shape. This will be described in more detail later.

The first color filter CF1, the second color filter CF2, and the third color filter CF3 may be disposed on the second substrate 60. In this embodiment, the first color filter CF1 may be a red filter, the second color filter CF2 may be a green filter, and the third color filter CF3 may be a blue filter. In FIG. 5B, the first color filter CF1 may be disposed on the second substrate 60 in correspondence to the sub-pixel SPX, and the second color filter (in response to other sub-pixels adjacent to the sub-pixel SPX) CF2) and a third color filter CF3 may be disposed on the second substrate 60, respectively.

The overcoat layer 66 is disposed on the second substrate 60 to cover the light blocking layer BM and the first to third color filters CF1, CF2, and CF3. In this embodiment, the overcoat layer 66 may be exposed on the liquid crystal layer 70 by being stacked on the top of the layers stacked on the second substrate 60.

From the viewpoint of the manufacturing method of the overcoat layer 66, after forming the light blocking layer BM and the first to third color filters CF1, CF2, and CF3 on the second substrate 60, the second substrate ( An insulating material may be applied to the entire area of 60), and the applied insulating material may be cured by heat to form an overcoat layer 66. Therefore, as shown in FIG. 8, when openings (H1 and H2 in FIG. 8) are formed in the color filters (CF1-3 and CF2-3 in FIG. 8 ), the overcoat layer 66 is openings (H1 and H2 in Figure 8) can be accommodated inside.

Hereinafter, a structure of a plurality of pixels arranged around the first boundary line BL1 will be described with reference to FIG. 6 to FIG. 6 as follows.

FIG. 6 is an enlarged view of the first pixel group PXG1 shown in FIG. 4.

4 and 6, as described with reference to FIG. 3, the rounded region of the second auxiliary display area ADA2 is defined as a first boundary line BL1, and is connected to the first boundary line BL1. A first pixel group PXG1 including pixels arranged adjacent to the first direction D1 is defined.

In this embodiment, the first pixel group PXG1 includes a first pixel PX1, a second pixel PX2, and a third pixel PX3 sequentially arranged in the first direction D1. In this embodiment, the criterion for distinguishing the first to third pixels PX1, PX2, and PX3 is based on the aperture ratio. In another embodiment, the first between the first pixel PX1 and the second pixel PX2 is At least one other pixel having the same aperture ratio as the pixel PX1 may be arranged, and in another embodiment, the same aperture ratio as the second pixel PX2 may be provided between the second pixel PX2 and the third pixel PX3. At least one other pixel may be arranged.

In this embodiment, each of the first to third pixels PX1, PX2, and PX3 may include three subpixels, and each of the first to third pixels PX1, PX2, and PX3 The sub-pixels may have the same aperture ratio with each other.

In this embodiment, the aperture ratio of each of the first to third pixels PX1, PX2, and PX3 is proportional to the size of the light transmitting portion formed in the light blocking layer BM. Therefore, as in this embodiment, the size of the area of the first light transmitting parts LH1 formed in the first pixel PX1 is the size of the area of the second light transmitting parts LH2 formed in the second pixel PX2. When the size of the area of the second light transmitting parts LH2 formed in the second pixel PX2 is smaller than that of the area of the third light transmitting parts LH3 formed in the third pixel PX3, The first aperture ratio of the first pixel PX1 is smaller than the second aperture ratio of the second pixel PX2, and the size of the second aperture ratio is smaller than the third aperture ratio of the third pixel PX3. That is, when the first pixel group PXG1 includes a plurality of pixels sequentially arranged in the first direction D1, the aperture ratios of the plurality of pixels belonging to the first pixel group PXG1 are the first boundary line ( It increases as it moves away from BL1).

As a result, among the first to third pixels PX1, PX2, and PX3 of the first pixel group PXG1, the first light amount output from the first pixel PX1 closest to the first boundary line BL1 is the most. little. Accordingly, the luminance of the first pixel PX1 is lower than the luminance of the second pixel PX2 or the luminance of the third pixel PX3, and as a result, the angular shape of the first pixel PX1 is visually blurred from the outside. The above-described aliasing phenomenon can be reduced.

Also, in the first pixel group PXG1, the second pixel PX2 is arranged between the first pixel PX1 and the third pixel PX3, and the second amount of light output from the second pixel PX2 is the above. It is less than the first light amount, and the second light amount is greater than the third light amount output from the third pixel PX3. Accordingly, the sharp change in luminance between the first pixel PX1 and the third pixel PX3 is mitigated by the second pixel PX2, and as a result, the display quality displayed in the first pixel group PXG1 is improved. Can.

7 is an enlarged view of the second pixel group PXG2 illustrated in FIG. 4.

4 and 7, the rounded region of the second auxiliary display area ADA2 is defined as a first boundary line BL1 and adjacent to the first boundary line BL1 in the second direction D2. The second pixel group PXG2 including the arranged pixels is defined.

In this embodiment, the second pixel group PXG2 includes a fourth pixel PX4, a fifth pixel PX5, and a sixth pixel PX6 sequentially arranged in the second direction D2. In this embodiment, the criterion for distinguishing the fourth to sixth pixels PX4, PX5, and PX6 is based on the aperture ratio. In another embodiment, the fourth is between the fourth pixel PX4 and the fifth pixel PX5. At least one other pixel having the same aperture ratio as the pixel PX4 may be arranged, and in another embodiment, the same aperture ratio as the fifth pixel PX5 may be provided between the fifth pixel PX5 and the sixth pixel PX6. At least one other pixel may be arranged.

Similar to the first to third pixels shown in FIG. 6 (PX1, PX2, PX3 in FIG. 6), each of the fourth to sixth pixels PX4, PX5, and PX6 in this embodiment is three subpixels. Each of the three sub-pixels of the fourth to sixth pixels PX4, PX5, and PX6 may have the same aperture ratio.

In this embodiment, the size of the area of the first light transmitting parts LH1 formed in the fourth pixel PX4 is smaller than the size of the area of the second light transmitting parts LH2 formed in the fifth pixel PX5, and the fifth The size of the area of the second light transmitting parts LH2 formed in the pixel PX5 is smaller than the size of the area of the third light transmitting parts LH3 formed in the sixth pixel PX6. Therefore, the fourth aperture ratio of the fourth pixel PX4 is smaller than the fifth aperture ratio of the fifth pixel PX5, and the fifth aperture ratio is smaller than the sixth aperture ratio of the sixth pixel PX6. That is, when the second pixel group PXG2 includes a plurality of pixels sequentially arranged in the second direction D2, the aperture ratios of the plurality of pixels belonging to the second pixel group PXG2 are the first boundary line ( It increases as it moves away from BL1).

As a result, among the fourth to sixth pixels PX4, PX5, and PX6 of the second pixel group PXG2, the fourth light amount output from the fourth pixel PX4 closest to the first boundary line BL1 is the most. little. Therefore, the luminance of the fourth pixel PX4 is lower than that of the fifth pixel PX5 or the luminance of the sixth pixel PX6, and as a result, the angular shape of the fourth pixel PX4 is visually recognized as blurring from the outside. The above-described aliasing phenomenon can be reduced.

Also, in the second pixel group PXG2, the fifth pixel PX5 is arranged between the fourth pixel PX4 and the sixth pixel PX6, and the fifth light amount output from the fifth pixel PX5 is the above. It is less than the fourth light amount, and the fifth light amount is greater than the sixth light amount output from the sixth pixel PX6. Therefore, the sharp change in luminance between the fourth pixel PX4 and the sixth pixel PX6 is alleviated by the fifth pixel PX5, and the display quality displayed in the second pixel group PXG2 can be improved. .

Hereinafter, a structure of color filters formed corresponding to the first to third pixels PX1, PX2, and PX3 will be described with reference to FIG. 6 again.

Referring to FIG. 6, the first pixel PX1 includes three sub-pixels, and the first to third color filters CF1, CF2, and CF3 are included in the three sub-pixels of the first pixel PX1. They are deployed one-to-one. In addition, the first to third color filters CF1-1, CF2-1, and CF3-1 are disposed in one-to-one correspondence with the three sub-pixels of the second pixel PX2, and the third pixel PX3 is disposed. The first to third color filters CF1-2, CF2-2, and CF3-2 are disposed in one-to-one correspondence to the three sub-pixels.

In this embodiment, the colors of the first to third color filters CF1, CF2, and CF3 formed in the first pixel PX1 are different from each other, but the first to third color filters of the first pixel PX1 are The structures of (CF1,CF2,CF3) may be identical to each other. Also, like the first to third color filters CF1, CF2, and CF3 of the first pixel PX1, the first to third color filters CF1-1, CF2-1 of the second pixel PX2 The structures of CF3-1) may be identical to each other, and the structures of the first to third color filters CF1-2, CF2-2, and CF3-3 of the third pixel PX3 may be identical to each other. . Therefore, the structure of the first color filter CF1 in the first pixel PX1 will be described as an example, and the structure of the first color filter CF1-1 in the second pixel PX2 will be described as an example. The structure of the first color filter CF1-2 in the third pixel PX3 will be described as an example.

In this embodiment, the first opening H1 is formed in the first color filter CF1 of the first pixel PX1, and the first opening is formed in the first color filter CF1-1 of the second pixel PX2. (H2) is formed. Further, the opened first width W1 of the first opening H1 is greater than the opened second width W2 of the second opening H2. Also, an opening is not formed in the first color filter CF1-2 of the third pixel PX3.

Therefore, the volume of the first color filter CF1 formed in the first pixel PX1 is smaller than the volume of the first color filter CF1-1 formed in the second pixel PX2, and formed in the second pixel PX2. The volume of the first color filter CF1-1 is smaller than the volume of the first color filter CF1-2 formed in the third pixel PX3.

Meanwhile, as described above, the size of the first light transmitting portion LH1 is smaller than the size of the second light transmitting portion LH2, and the size of the second light transmitting portion LH2 is smaller than the size of the third light transmitting portion LH3. . Accordingly, the volume of the light blocking layer BM formed in the first pixel PX1 is greater than the volume of the light blocking layer BM2 formed in the second pixel PX2, and the volume of the light blocking layer BM formed in the second pixel PX2 is The volume is larger than the volume of the light blocking layer BM formed in the third pixel PX3.

In summary, the volume of the light blocking layer BM is sequentially increased in the order of the first pixel PX1, the second pixel PX2, and the third pixel PX3, and the volume of the color filter is the first. The pixels PX1, the second pixels PX2, and the third pixels PX3 are sequentially decreased. Accordingly, even if the volume of the light blocking layer BM formed in the first to third pixels PX1, PX2, and PX3 is sequentially increased, the color filter formed in the first to third pixels PX1, PX2, and PX3 When the volume is adjusted as described above, variations in volumes occupied by the light blocking layer BM and the color filter in the first to third pixels PX1, PX2, and PX3 may be reduced.

As a result, steps are prevented from being generated in the overcoat layer 66 which is formed to cover the light blocking layer BM and the color filters in the first to third pixels PX1, PX2, and PX3, thereby preventing the liquid crystal layer ( The flatness of the surface of the overcoat layer 66 exposed to 70) is improved, and the cell gaps of the first to third pixels PX1, PX2, and PX3 are uniform, so that the display quality of the liquid crystal display panel can be improved. .

8 is a cross-sectional view showing a plane cut along II-II` shown in FIG. 7.

Referring to FIGS. 7 and 8, the second pixel group PXG2 includes a fourth pixel PX4, a fifth pixel PX5, and a sixth pixel PX6 sequentially arranged in the second direction D2. do. In addition, the first color filter CF1-3 is disposed in the subpixel of the fourth pixel PX4, the first color filter CF1-4 is disposed in the subpixel of the fifth pixel PX5, and the sixth The first color filter CF1-5 is disposed in the subpixel of the pixel PX6.

In this embodiment, a first opening H1 is formed in the first color filter CF1-3 of the fourth pixel PX4, and is removed from the first color filter CF1-4 of the fifth pixel PX5. Two openings H2 are formed, and an opening is not formed in the first color filter CF1-5 of the sixth pixel PX6.

In this embodiment, the first width W1 of the first opening H1 may be greater than the second width W2 of the second opening H2. Therefore, the volume of the first color filter CF1-3 formed in the fourth pixel PX4 is smaller than the volume of the first color filter CF1-4 formed in the fifth pixel PX5, and the fifth pixel PX5. The volume of the first color filter CF1-4 formed in is smaller than the volume of the first color filter CF1-5 formed in the sixth pixel PX6. In addition, the size of the first light transmitting portion LH1 formed in the fourth pixel PX4 is smaller than the size of the second light transmitting portion LH2 formed in the fifth pixel PX5, and the size of the second light transmitting portion LH2 is It is smaller than the size of the third light transmitting portion LH3 formed in the sixth pixel PX6.

That is, the volume of the light blocking layer BM is sequentially increased in the order of the fourth pixel PX4, the fifth pixel PX5, and the sixth pixel PX6, and the volume of the color filter is the fourth pixel PX4, The fifth pixel PX5 and the sixth pixel PX6 sequentially decrease. Therefore, even if the volume of the light blocking layer BM formed in the fourth to sixth pixels PX4, PX5, PX6 is sequentially increased, the color filter formed in the fourth to sixth pixels PX4, PX5, PX6 When the volume is adjusted as described above, variations in volumes occupied by the light blocking layer BM and the color filter in the fourth to sixth pixels PX4, PX5, and PX6 may be reduced.

In addition, as shown in FIG. 8, the overcoat layer 66 is formed inside the first opening H1 and the second opening H2 formed in the color filters CF1-3, CF1-4, and CF1-5. It is formed into an acceptable structure. Accordingly, a step can be prevented from being generated in the overcoat layer 66 formed in a batch over the fourth to sixth pixels PX4, PX5, and PX6, and as a result, the fourth to sixth pixels PX1, The size of the cell gap CG of the PX2 and PX3) becomes uniform, and an effect of improving the display quality of the liquid crystal display panel occurs.

Although it has been described with reference to the above embodiment, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention described in the scope of the following claims. You will understand.

100: LCD panel 300: Cover window
500: liquid crystal display device DA: display area
MDA: Main display area ADA1: First auxiliary display area
ADA2: Second auxiliary display area NDA: Non-display area
TA: Transmission area NTA: Non-transmission area
BL1: First boundary line SPX: Sub-pixel
PXG1: first pixel group PX1: first pixel
BM: Light-shielding layer DPX: Dummy pixel
H1: first opening LH1: first light transmission
CF1: 1st color filter

Claims (10)

A first substrate;
A plurality of pixels arranged in a row direction and a column direction on the first substrate corresponding to a display area;
A second substrate facing the first substrate and coupled to the first substrate;
A liquid crystal layer disposed between the first substrate and the second substrate;
A plurality of color filters disposed on the first substrate or the second substrate and overlapping the plurality of pixels; And
And an overcoat layer covering the plurality of color filters,
A pixel group including predetermined pixels arranged in the row direction or the column direction is defined adjacent to a boundary line defining a rounded area of the display area,
The aperture ratio of the pixels in the pixel group increases as the distance from the boundary line increases, and the color filter overlapping the pixels arranged on the outermost side of the pixel group adjacent to the boundary line is formed with an opening for accommodating the overcoat layer. Characterized by a liquid crystal display panel. According to claim 1,
Further comprising; a plurality of light blocking layers disposed on the first substrate or the second substrate,
The aperture ratio increases as the size of the light transmitting portion formed in each of the plurality of light blocking layers increases. 3. The pixel group of claim 2, wherein the pixel group comprises a first pixel arranged outermost adjacent to the boundary line, a second pixel arranged next to the first pixel, and a third pixel arranged next to the second pixel. Including,
The light transmission portion includes a first light transmission portion corresponding to the first pixel, a second light transmission portion corresponding to the second pixel, and a third light transmission portion corresponding to the third pixel,
The size of the first light transmitting portion is smaller than the size of the second light transmitting portion, and the size of the second light transmitting portion is smaller than the size of the third light transmitting portion. The size of the color filter corresponding to the first pixel among the plurality of color filters is smaller than the size of the color filter corresponding to the second pixel, and the second pixel of the plurality of color filters. The size of the color filter corresponding to is smaller than the size of the color filter corresponding to the third pixel. The method of claim 4, wherein the opening includes a first opening corresponding to the first pixel and a second opening corresponding to the second pixel, wherein the width of the first opening is greater than the width of the second opening Characterized by a liquid crystal display panel. The liquid crystal display panel of claim 5, wherein the overcoat layer is accommodated in the first opening and the second opening. The liquid crystal according to claim 3, wherein another pixel having the same aperture ratio as any one of the first pixel or the second pixel is further arranged between the first pixel and the second pixel in the pixel group. Display panel. The liquid crystal display panel of claim 1, wherein each of the plurality of pixels includes subpixels, and the subpixels have the same aperture ratio. The method of claim 1, wherein the display area,
Main display area;
A first auxiliary display area located on one side of an upper portion of the main display area; And
And a second auxiliary display area located on the other side of the top of the main display area,
A valley is defined in the center of the upper end of the display area, and the first auxiliary display area and the second auxiliary display area are spaced apart from each other with the goal interposed therebetween. 10. The liquid crystal display device of claim 9, wherein the boundary line is a part of a boundary defining each of the first auxiliary display area and the second auxiliary display area.

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