KR20250020567A - Liquid crystal display panel - Google Patents

Abstract

In a heterogeneous liquid crystal display panel according to the present invention, the open ratio by the black matrix is differentially applied according to the location of the unit pixels arranged at the edge of the display area and the area located in the display area.

Description

Heteromorphic liquid crystal display panel {Liquid crystal display panel}

The present invention relates to a liquid crystal display device, and more particularly, to a heteromorphic liquid crystal display panel used in a display device for an automobile, etc.

The application range of liquid crystal displays is gradually expanding due to their characteristics such as light weight, thinness, and low power consumption. Such liquid crystal displays are widely used in portable computers such as notebook PCs, office automation equipment, audio/visual equipment, indoor/outdoor advertising display devices, and automotive display devices.

As recent automotive display devices require differentiated picture quality and differentiated design, various free-from liquid crystal display devices such as circular, corner-cut, and curved types are required in addition to existing rectangular display devices.

In such a heterogeneous liquid crystal display, each pixel is formed in a square shape, and the area where no pixels are arranged is blocked by a black matrix, so the black matrix at the edge of the heterogeneous liquid crystal display is formed in a step shape.

Accordingly, there was a problem that the curved edges of various types of liquid crystal displays, such as circular, corner-cut, and curved, were not displayed smoothly but were perceived as step-like, like a black matrix.

The present invention is intended to solve the above-mentioned conventional problems, and the purpose of the present invention is to provide a heterogeneous liquid crystal display panel capable of improving step recognition defects by adjusting the black matrix open ratio in pixels in the edge area of the heterogeneous liquid crystal display device.

In order to achieve the above object, according to the present invention, a heterogeneous liquid crystal display panel comprises: a first substrate divided into a display area and a non-display area, in which a plurality of gate lines and a plurality of data lines are arranged in the display area to define a plurality of sub-pixel areas; thin film transistors and pixel electrodes arranged in each sub-pixel area; and a black matrix arranged on a second substrate facing the first substrate to cover the plurality of gate lines, the plurality of data lines, and the thin film transistors; and unit pixels arranged at the edge of the display area have different areas covered by the black matrix depending on their positions and areas positioned in the display area, so that an open ratio can be differentially applied.

The unit pixels to which the above open ratio is differentially applied can be divided into at least three stages of open ratio.

The first unit pixels that are positioned at the edge and have a small area positioned in the display area may have a relatively lowest open ratio, the second unit pixels that are positioned at the edge but have a relatively larger area positioned in the display area than the first unit pixels may have a relatively higher open ratio than the first unit pixels, and the third unit pixels that are positioned at the edge but have a relatively larger area positioned in the display area than the second unit pixels may have a relatively higher open ratio than the second unit pixels.

Assuming that the open ratio of the unit pixels located at the center of the display area, centered around the gate lines, data lines and thin film transistors, is 100%, the first unit pixels can be covered by the black matrix to have an open ratio of 10% to 30%, the second unit pixels can be covered by the black matrix to have an open ratio of 40% to 60%, and the third unit pixels can be covered by the black matrix to have an open ratio of 70% to 90%.

Each unit pixel has a 1 sub-pixel 2 domain structure, and the domain boundary of each sub-pixel can be shaded by the black matrix.

The black matrix may be formed such that a first black matrix is arranged in a portion corresponding to a gate line, a data line, and a thin film transistor, a second black matrix is arranged at a domain boundary, and the widths of the first and second black matrices in the first unit pixels are widest, the widths of the first and second black matrices in the second unit pixels are narrower than in the first unit pixels, and the widths of the first and second black matrices in the third unit pixels are narrower than in the second unit pixels.

The open ratio can be adjusted by adjusting the width of the first black matrix and the width of the second black matrix, respectively.

The width of the first black matrix can be maintained the same, and the open ratio can be adjusted by adjusting the width of the second black matrix.

The width of the second black matrix can be maintained the same, and the open ratio can be adjusted by adjusting the width of the first black matrix.

Each unit pixel has a 1 sub-pixel 1 domain structure, and the unit pixels arranged at the edge of the display area can differentially apply an open ratio by increasing or decreasing the area covering the pixel area centered on the plurality of gate lines, the plurality of data lines, and the thin film transistors, depending on the position and the area positioned in the display area.

The heteromorphic liquid crystal display panel according to the present invention having the above-described characteristics has the following effects.

First, unit pixels arranged at the edge of the display area of a heterogeneous liquid crystal display device have an open ratio differentially applied by a black matrix according to the location and the area located in the display area, so that the step recognition defect that is recognized in a step-like manner, such as a black matrix form, can be improved.

Second, in a heterogeneous liquid crystal display panel having a 1 sub-pixel 2 domain structure, the domain boundary of each sub-pixel is shaded by a black matrix, and the unit pixels arranged at the edge of the display area of the heterogeneous liquid crystal display device have an open ratio differentially applied by the black matrix according to the position and the area located in the display area, thereby preventing a decrease in transmittance at the domain boundary of each sub-pixel and, further, preventing the occurrence of a color difference.

Third, power consumption can be reduced because there is no need to apply the round algorithm of the data drive IC.

Figure 1 is a configuration diagram of a liquid crystal display device according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating the configuration of a sub-pixel of a liquid crystal display panel according to the first embodiment of the present invention.
FIG. 3 is a diagram showing the configuration of a sub-pixel of a liquid crystal display panel according to a second embodiment of the present invention.
Figure 4 is a schematic diagram for explaining a heterogeneous liquid crystal display panel according to the present invention.
FIG. 5 is an enlarged view of an edge portion of the heterogeneous liquid crystal display panel of FIG. 4 according to an embodiment of the present invention.
FIG. 6a is a plan view of a pixel having an open ratio of 10% to 30% of a heterogeneous liquid crystal display panel according to the present invention.
FIG. 6b is a cross-sectional view of a pixel having an open ratio of 10% to 30% of a heterogeneous liquid crystal display panel according to the present invention.
FIG. 7a is a plan view of a pixel having an open ratio of 40% to 60% of a heterogeneous liquid crystal display panel according to the present invention.
FIG. 7b is a cross-sectional view of a pixel having an open ratio of 40% to 60% of a heterogeneous liquid crystal display panel according to the present invention.
FIG. 8a is a plan view of a pixel having an open ratio of 70% to 90% of a heterogeneous liquid crystal display panel according to the present invention.
FIG. 8b is a cross-sectional view of a pixel having an open ratio of 70% to 90% of a heterogeneous liquid crystal display panel according to the present invention.

The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and the present invention is not limited to the matters illustrated in the drawings. The same reference numerals throughout the specification refer to substantially the same components. In addition, in explaining the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

In the specification, when the terms "comprises," "includes," "has," and "consists of," are used, other parts may be added unless "only" is used. When a component is expressed in the singular, it can be interpreted as plural unless there is a special explicit statement.

When interpreting a component, it is interpreted as including the error range even if there is no separate explicit description.

When describing a positional relationship, for example, when the positional relationship between two components is described as "on", "above", "below", "next to", etc., one or more other components may be interposed between those components for which "directly" or "immediately" is not used. When an element or layer is referred to as "on" another element or layer, it includes all cases where the other element is directly on it or there is another layer or element intervening therebetween.

Although the terms 1st, 2nd, etc. may be used to distinguish components, the function or structure of these components is not limited by the ordinal number or component name attached to the front of the component.

The following embodiments may be partially or wholly combined or combined with each other, and may be technically capable of various interconnections and operations. Each embodiment may be implemented independently of each other, or may be implemented together in a related relationship.

Hereinafter, the heterogeneous liquid crystal display device according to the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a configuration diagram of a liquid crystal display device according to an embodiment of the present invention.

Referring to FIG. 1, a liquid crystal display (100) according to an embodiment of the present invention includes a liquid crystal display panel (110) on which a plurality of data lines (DL) and a plurality of gate lines (GL) are arranged and a plurality of sub-pixels (SP) defined by the plurality of data lines (DL) and the plurality of gate lines (GL) are arranged to display an image, a data driving circuit (120) that drives the plurality of data lines (DL), a gate driving circuit (130) that drives the plurality of gate lines (GL), and a controller (140) that controls the data driving circuit (120) and the gate driving circuit (130).

The above controller (140) supplies various control signals (DCS, GCS) to the data driving circuit (120) and the gate driving circuit (130), thereby controlling the data driving circuit (120) and the gate driving circuit (130).

The controller (140) can align input image data input from the outside in accordance with the data signal format used by the data driving circuit (120) and output aligned image data (Data). For example, the controller (140) can supply image data (Data) converted in accordance with the resolution or sub-pixel structure of the liquid crystal display panel (110) to the data driving circuit (120).

In addition, the controller (140) outputs various data control signals (DCS: Data Control Signal) including a source start pulse (SSP: Source Start Pulse), a source sampling clock (SSC: Source Sampling Clock), a source output enable signal (SOE: Source Output Enable), a polarity control signal (POL), etc., in order to control the data drive circuit (120).

The above polarity control signal (POL) is a signal that controls the polarity of data voltages sequentially output from each output channel of the data driving circuit (120). For example, the polarity control signal (POL) may be inverted in units of 1 frame period corresponding to a column inversion method, or in units of N horizontal periods corresponding to a vertical N dot inversion method.

The controller (140) may be a timing controller used in a typical display device, or may be a control device that includes a timing controller and performs other control functions. The controller (140) may be implemented as a separate component from the data driving circuit (120), or may be implemented as an integrated circuit by being integrated with the data driving circuit (120).

The above data driving circuit (120) receives image data (Data) from the controller (140) and supplies data voltage to a plurality of data lines (DL), thereby driving a plurality of data lines (DL). Here, the data driving circuit (120) may be composed of a plurality of source driving ICs.

The above gate driving circuit (130) sequentially drives the plurality of gate lines (GL) by sequentially supplying scan signals to the plurality of gate lines (GL).

The above liquid crystal display panel (110) includes a thin film transistor array substrate including a thin film transistor, a color filter array substrate having a color filter and/or a black matrix, and a liquid crystal layer formed therebetween.

The liquid crystal display panel (110) according to the present invention has a plurality of gate lines (GL) and a plurality of data lines (DL) that intersect each other, as described in FIG. 1.

The above-described plurality of gate lines (GL) and plurality of data lines (DL) can be arranged in various ways.

In order to reduce the cost of the driving circuit of the liquid crystal display device, a liquid crystal display panel of the DRD (Double Rate Driving) method is being developed, which reduces the number of data lines by half instead of doubling the number of gate lines compared to the existing one, thereby reducing the number of data driving ICs of the data driving circuit (120).

That is, a plurality of sub-pixels are arranged between odd-numbered gate lines and even-numbered gate lines, no sub-pixels are arranged between even-numbered gate lines and odd-numbered gate lines, two sub-pixels that are horizontally adjacent are connected to one data line, and two sub-pixels that are connected to one data line and are horizontally adjacent are driven by different gate lines.

Additionally, each sub-pixel includes a thin film transistor (TFT) having a gate electrode connected to the gate line (GL), a source electrode connected to the data line (DL), and a drain electrode connected to the pixel electrode of the sub-pixel.

The configuration of the above thin film transistor (TFT) and pixel electrode is described in more detail as follows.

The liquid crystal display panel according to the embodiment of the present invention can be applied to a liquid crystal display panel having the DRD structure described above, and a liquid crystal display panel having a structure in which sub-pixels are arranged at the portion where each gate line and each data line intersect may also be used.

In addition, the configuration of the sub-pixels of the liquid crystal display panel according to the embodiment of the present invention is designed to take into account that the liquid crystal display panel having a 1 sub-pixel 1 domain structure has only one domain in the sub-pixel, so that the image quality deteriorates due to the color shift problem and the gray inversion problem in the diagonal direction, and thus a liquid crystal display panel having a 1 sub-pixel 2 domain structure can be applied. That is, the pixel electrode and the data line have a bent portion so that one sub-pixel configures 2 domains.

FIG. 2 is a diagram showing the configuration of a sub-pixel of a liquid crystal display panel according to the first embodiment of the present invention.

Figure 2 illustrates a sub-pixel of a 1 sub-pixel 2 domain structure in a liquid crystal display panel of a TN (Twisted Nematic) mode with a DRD structure.

As illustrated in FIG. 2, a sub-pixel of a liquid crystal display panel according to a first embodiment of the present invention has a plurality of sub-pixels arranged between a first gate line (GL1) and a second gate line (GL2), and two sub-pixels that are horizontally adjacent are connected to one data line.

A thin film transistor is arranged in each sub-pixel area where each gate line (GL1, GL2) and the data line (DL) intersect, and is provided with a gate electrode (11), a source electrode (12), and a drain electrode (13).

And, a pixel electrode (14) electrically connected to the drain electrode (13) of the thin film transistor is arranged in each sub-pixel area.

Here, in order to obtain the 1 sub-pixel 2 domain structure as mentioned above, the pixel electrode (14) and the data line (DL) have a bent portion.

Meanwhile, FIG. 3 is a diagram showing the configuration of a sub-pixel of a liquid crystal display panel according to the second embodiment of the present invention.

Figure 3 illustrates a sub-pixel of a 1 sub-pixel 2 domain structure in a liquid crystal display panel of an IPS (In Plane Switching) mode having a general structure rather than a DRD structure.

According to the second embodiment of the present invention, a sub-pixel of a liquid crystal display panel, as illustrated in FIG. 3, has gate lines (GL1, GL2 lines) arranged in a first direction, data lines (DL) arranged in a second direction perpendicular to the first direction, and common lines (CL) arranged in a direction parallel to the gate lines (GL1, GL2) in the first direction.

And, in each sub-pixel area, a thin film transistor (T) is formed at the intersection of each gate line (GL1, GL2) and each data line (DL). In addition, in each sub-pixel area, a plurality of common electrodes (21) are branched in the second direction from the common line (CL), and a plurality of pixel electrodes (22) are formed in the second direction between the common electrodes (21) by being electrically connected to the drain electrodes of the thin film transistors (T).

Likewise, in order to obtain the 1 sub-pixel 2 domain structure as mentioned above, the common electrode (21), the pixel electrode (22) and the data line (DL) have a bent portion.

Although FIGS. 2 and 3 illustrate liquid crystal display panels in TN mode and IPS mode, the present invention is not limited thereto and can be applied to various liquid crystal display panels such as VA (Vertically Aligned) mode and FFS (Fringe Field Switching) mode.

FIG. 4 illustrates a heterogeneous liquid crystal display panel according to the present invention, and FIG. 5 is an enlarged view of an edge portion of the heterogeneous liquid crystal display panel of FIG. 4 according to an embodiment of the present invention.

In Fig. 4, the display area (A/A) of the heteromorphic (circular) liquid crystal display panel is illustrated. As illustrated in Figs. 4 and 5, the display area (A/A) of the heteromorphic liquid crystal display panel is formed in a circular shape, and in each display area, square-shaped unit pixels (UP) are arranged in a matrix form.

Accordingly, the unit pixels (UP) at the edge portion of the display area (A/A) of the above-described heteromorphic (circular) liquid crystal display panel may not be located completely within the display area (A/A) of the above-described heteromorphic (circular) liquid crystal display panel, but only a certain portion of the unit pixels (UP) may be located within the display area (A/A) of the above-described heteromorphic (circular) liquid crystal display panel.

As illustrated in FIG. 5, a heterogeneous liquid crystal display panel according to an embodiment of the present invention is divided into a display area (A/A) and a bezel area (Bezel), and among the unit pixels (UP) positioned within the display area (A/A), the unit pixels positioned at the edge portion have an open ratio differentially applied by a black matrix (BM) according to the position and the area positioned in the display area.

As described in Fig. 1, the liquid crystal display panel (110) has a plurality of data lines (DL) and a plurality of gate lines (GL) intersectingly arranged to define a plurality of sub-pixels (SP). In addition, a thin film transistor and a pixel electrode are arranged in each sub-pixel. The thin film transistor is controlled according to a gate signal (scan signal) applied through each gate line (GL) and supplies a data voltage applied through each data line (DL) to the pixel electrode.

In such an arrangement, a black matrix is typically formed to cover the plurality of data lines (DL), the plurality of gate lines (GL), and the thin film transistors.

However, in the present invention, depending on the location of the unit pixels arranged at the edge and the area positioned in the display area, the black matrix (BM) is arranged to cover not only the plurality of data lines (DL), the plurality of gate lines (GL) and thin film transistors, but also some of the unit pixels where the pixel electrodes are formed, thereby differentially applying the open ratio of the unit pixels.

That is, the first unit pixels (1) located at the edge and having a small area positioned in the display area have a relatively lowest open ratio, the second unit pixels (2) located at the edge but having a relatively large area positioned in the display area have a relatively higher open ratio than the first unit pixels, the third unit pixels (3) located at the edge but having a complete area positioned in the display area have a relatively higher open ratio than the second unit pixels, and the fourth unit pixels (4) located in the center of the display area far from the edge have the highest open ratio.

For example, assuming that the open ratio of the fourth unit pixels (4) is 100%, the first unit pixels (1) have an open ratio of 10% to 30%, the second unit pixels (2) have an open ratio of 40% to 60%, and the third unit pixels (3) have an open ratio of 70% to 90%, so that the black matrix (BM) covers the unit pixels arranged at the edge portion of the heterogeneous liquid crystal display panel.

The above-mentioned open ratios are not limited thereto, and the unit pixels located at the edge of the heterogeneous liquid crystal display panel may be divided into three or more according to the area located in the display area, and the open ratios may be adjusted to various values for each divided unit pixel.

In addition, the method of covering the unit pixels arranged at the edge portion of the heterogeneous liquid crystal display panel by the black matrix is such that the central portion of each sub-pixel is exposed.

That is, assuming that the open ratio of the fourth unit pixels (4) is 100%, centered on the gate lines, data lines, and thin film transistors, the first unit pixels (1) are covered by the black matrix (BM) to have an open ratio of 10% to 30%, the second unit pixels (2) are covered by the black matrix (BM) to have an open ratio of 40% to 60%, and the third unit pixels (3) are covered by the black matrix (BM) to have an open ratio of 70% to 90%.

In this way, since the open ratio by the black matrix (BM) is differentially applied to the unit pixels (UP) positioned at the edge portions among the unit pixels (UP) positioned within the display area (A/A) and the area in which they are positioned in the display area, even if the edge of various types of non-circular liquid crystal display panels, such as circular, corner-cut, and curved, is covered by the black matrix in a step shape, the curved surface of the edge of the non-circular liquid crystal display panel is displayed smoothly.

FIG. 6a is a plan view of a pixel having an open ratio of 10% to 30% of a heterogeneous liquid crystal display panel according to the present invention, and FIG. 6b is a cross-sectional view of a pixel having an open ratio of 10% to 30% of a heterogeneous liquid crystal display panel according to the present invention.

FIG. 7a is a plan view of a pixel having an open ratio of 40% to 60% of a heterogeneous liquid crystal display panel according to the present invention, and FIG. 7b is a cross-sectional view of a pixel having an open ratio of 40% to 60% of a heterogeneous liquid crystal display panel according to the present invention.

FIG. 8a is a plan view of a pixel having an open ratio of 70% to 90% of a heterogeneous liquid crystal display panel according to the present invention, and FIG. 8b is a cross-sectional view of a pixel having an open ratio of 70% to 90% of a heterogeneous liquid crystal display panel according to the present invention.

In FIGS. 6a to 8bd, in a heterogeneous liquid crystal display panel in which a common electrode, a pixel electrode, and a data line have bent portions to obtain a 1 sub-pixel 2 domain structure as described in FIGS. 2 and 3, the open ratio by the black matrix is differentially applied depending on the position of the sub-pixel arranged at the edge.

A liquid crystal display panel having a 1 sub-pixel 2 domain structure, as described above, improves image quality by solving color shift and gray inversion problems in the diagonal direction, but has a disadvantage in that foreground lines occur at domain boundaries, reducing panel transmittance.

The present invention, as illustrated in FIGS. 6A, 7A, and 8A, differentially applies an open ratio by a black matrix (BM) to unit pixels (UP) positioned at an edge portion within a display area (A/A) according to the position and area of the unit pixels positioned in the display area, and is characterized in that the domain boundary of a sub-pixel having a 1 sub-pixel 2 domain structure is shaded by the black matrix (BM).

Accordingly, it is possible to prevent a decrease in transmittance at the domain boundary of each sub-pixel of a liquid crystal display panel having a 1 sub-pixel 2 domain structure and prevent the occurrence of color difference.

The cross-sectional structure of a pixel of a heterogeneous liquid crystal display panel in IPS mode according to the present invention may include, as shown in FIGS. 6b, 7b, and 8b, a gate line (not shown in the drawings, see GL1 and GL2 in FIG. 3) and a gate electrode (G) formed on a lower substrate (SUB1), and a gate insulating film (GI) formed on the entire surface of the lower substrate (SUB1) including the gate line and the gate electrode (G).

A semiconductor layer (ACT) is formed on the gate insulating film (GI) overlapping the gate electrode (G), and a source electrode (S) is formed on one side of the semiconductor layer (ACT), and a drain electrode (D) is formed on the other side, so that a thin film transistor can be formed. The source electrode (S) is formed to protrude from the data line (DL) (see FIG. 3).

A protective film (PAS) is formed on the entire surface of the lower substrate (SUB1) including the thin film transistor, and the protective film (PAS) can be selectively removed to expose the drain electrode (D) so that a contact hole can be formed.

A pixel electrode (PXL) is formed on the protective film (PAS) so as to be electrically connected to the drain electrode (D) through the contact hole, and a common electrode (COM) is formed between the pixel electrodes (PXL) so as to form a horizontal electric field (see FIG. 3). As illustrated in FIG. 3, the common electrode (COM) branches off from the common line (CL) in a second direction (a direction parallel to the data line).

On the upper substrate (SUB2), black matrices (BM1, BM2) may be arranged on gate lines (GL), data lines (DL), thin film transistors, and domain boundaries. That is, a first black matrix (BM1) may be formed in a portion corresponding to the gate line (GL), the data line (DL), and the thin film transistor, and a second black matrix (BM2) may be arranged on the domain boundary.

A color filter layer (CF) may be arranged within a sub-pixel area between the first and second black matrices (BM1, BM2). The color filter layer (CF) may have an arrangement of red (R), green (G), and blue (B) color filters according to the arrangement of the sub-pixels, or may have an arrangement of red (R), green (G), blue (B), and white (w) color filters.

And, an upper alignment film (ALG2) can be formed on the entire surface of the upper substrate (SUB2) including the first and second black matrices (BM1, BM2) and the color filter layer (CF).

The upper substrate (SUB2) and the lower substrate (SUB1) configured as described above are bonded so that the upper alignment film (ARG2) and the lower alignment film (ARG1) face each other and have a predetermined space, and a liquid crystal layer (LC) is filled between the bonded upper substrate (SUB2) and the lower substrate (SUB1).

At this time, the areas where the first and second black matrices (BM1, BM2) are formed differ depending on the location of the sub-pixel.

That is, as described in FIGS. 4 and 5, among the unit pixels (UP) positioned within the display area (A/A), the unit pixels positioned at the edge portion have different open ratios by the first and second black matrices (BM1, BM2) depending on the location and the area positioned in the display area.

Accordingly, the first unit pixels (1) illustrated in FIG. 5 have, as shown in FIGS. 6a and 6b, a relatively lowest open ratio due to the first and second black matrices (BM1, BM2) (an open ratio of 10% to 30%), the second unit pixels (2) illustrated in FIG. 5 have, as shown in FIGS. 7a and 7b, a relatively higher open ratio due to the first and second black matrices (BM1, BM2) (40% to 60%) than the first unit pixels (FIGS. 6a and 6b), and the third unit pixels (3) illustrated in FIG. 5 have, as shown in FIGS. 8a and 8b, a relatively higher open ratio due to the first and second black matrices (BM1, BM2) (70% to 90%) than the second unit pixels (FIGS. 7a and 7b).

As shown in the cross-sectional structures of FIGS. 6b, 7b and 8b, the widths of the first and second black matrices (BM1, BM2) in the first unit pixels (1) are the widest, the widths of the first and second black matrices (BM1, BM2) in the second unit pixels (2) are narrower than in the first unit pixels (1), and the widths of the first and second black matrices (BM1, BM2) in the third unit pixels (3) are narrower than in the third unit pixels (2).

Here, the open ratio can be adjusted by adjusting the width of the first black matrix and the width of the second black matrix, respectively.

The width of the first black matrix can be kept the same, and the open ratio can be adjusted by adjusting the width of the second black matrix.

Conversely, the width of the second black matrix can be kept the same, and the open ratio can be adjusted by adjusting the width of the first black matrix.

As described above, the present invention differentially applies an open ratio by a black matrix according to the position of a sub-pixel arranged at an edge portion in a heterogeneous liquid crystal display panel having a 1 sub-pixel 2 domain structure, and in particular, blocks light at a domain boundary portion by a black matrix, thereby preventing a decrease in transmittance at a domain boundary portion of each sub-pixel and, further, preventing occurrence of a color difference. In addition, since there is no need to apply a round algorithm of a data driving IC, power consumption can be reduced.

In addition, although the liquid crystal display panel having a 1 sub-pixel 2 domain structure has been described as an example so far, it is not limited thereto and can be sufficiently applied to a liquid crystal display panel having a 1 sub-pixel 1 domain structure.

That is, in the case of a liquid crystal display panel having a 1 sub-pixel 1 domain structure, the unit pixels arranged at the edge of the display area can differentially apply an open ratio by increasing or decreasing the area that the black matrix covers the pixel area centered on the plurality of gate lines, the plurality of data lines, and the thin film transistors, depending on the position and the area positioned in the display area.

In the case of a liquid crystal display panel having a 1 sub-pixel 1 domain structure, the second black matrix (BM2) is not formed, and only the first black matrix (BM1) is formed, so that the area that the black matrix covers the pixel area centered on the plurality of gate lines, the plurality of data lines, and the thin film transistors is increased or decreased, so that the unit pixels arranged at the edge of the display area can differentially apply an open ratio depending on the location and the area positioned in the display area.

Through the above explanation, those skilled in the art will be able to see that various changes and modifications are possible without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the scope of the patent claims.

A/A: Display area BM1, BM2: Black matrix

Claims (16)

A first substrate including a plurality of sub-pixel areas defined by crossing gate lines and data lines;
A thin film transistor having a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode connected to the pixel electrode of the sub-pixel area, and arranged at an intersection of the gate line and the data line;
A first passivation layer disposed on the above thin film transistor;
The pixel electrode disposed on the first passivation layer;
A common line orthogonal to the above data line and a common electrode branched from the common line; and
A second substrate is provided, which is arranged on the pixel electrode and the common electrode and has a black matrix and a color filter layer;
At least one of the data line, the pixel electrode or the common electrode has at least one bend,
A display device, wherein at least one of the black matrix or the color filter layer has at least one folded portion corresponding to the data line, the pixel electrode or the common electrode having the at least one folded portion. In paragraph 1,
The above sub-pixel area is located between the black matrices,
A display device in which the above black matrix is arranged to have different widths for the sub-pixels. In the second paragraph,
The above sub-pixel region has an array of red, green, and blue sub-pixels, or an array of red, green, blue, and white sub-pixels,
A display device in which the red sub-pixel is arranged at the outermost edge of the sub-pixel area. In paragraph 1,
The above sub-pixel area is located between the black matrices,
The above black matrix is a display device in which the width covering the sub-pixels is different depending on the location of the sub-pixels. In paragraph 4,
The above black matrix is a display device that covers the edges of the sub-pixels. In paragraph 1,
The above sub-pixel area is located between the black matrices,
A display device in which the black matrix covers at least one folded portion of the pixel electrode or the common electrode. In paragraph 1,
The above color filter is located between the above black matrices,
A display device in which the above black matrix is arranged to have a different width with respect to the color filter. In paragraph 1,
The above color filter is located between the above black matrices,
The above black matrix is a display device in which the width covering the color filter is different depending on the location of the sub-pixels. In Article 8,
The above black matrix is a display device that covers the edge of the color filter. In paragraph 1,
The above color filter is located between the above black matrices,
A display device in which the above black matrix covers at least one folded portion of the color filter. In paragraph 1,
The above color filter has an arrangement of red, green, and blue, or an arrangement of red, green, blue, and white,
A display device in which the red color filter is arranged at the outermost edge of the sub-pixel area. In paragraph 1,
The above common electrode branches out into multiple branches in a direction parallel to the data line from the above common line,
A display device in which the pixel electrodes are branched into multiple portions in a direction parallel to the data lines between the common electrodes. A first substrate including a plurality of sub-pixel areas defined by crossing gate lines and data lines;
A thin film transistor having a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode connected to the pixel electrode of the sub-pixel area, and arranged at an intersection of the gate line and the data line;
A first passivation layer disposed on the above thin film transistor;
The pixel electrode disposed on the first passivation layer;
A common line orthogonal to the above data line and a common electrode branched from the common line; and
A second substrate is provided, which is arranged on the pixel electrode and the common electrode and has a black matrix and a color filter layer,
At least one of the data line, the pixel electrode or the common electrode has at least one bend,
A display device in which the above black matrix is placed on at least one of the folded portions. In Article 13,
A display device, wherein at least one of the black matrix or the color filter layer has at least one folded portion corresponding to the data line, the pixel electrode or the common electrode having the at least one folded portion. In Article 13,
The above sub-pixel area is located between the black matrices,
A display device in which the above black matrix is arranged to have different widths for the sub-pixels. In Article 15,
The above sub-pixel region has an array of red, green, and blue sub-pixels, or an array of red, green, blue, and white sub-pixels,
A display device in which the red sub-pixel is arranged at the outermost edge of the sub-pixel area.