KR20130066265A - Liquid crystal display panel - Google Patents

Abstract

PURPOSE: A liquid crystal display panel is provided to minimize the liquidity constraints of the liquid crystal substance by dividing 'dam spacers formed in a narrow bezel type liquid crystal display panel' into multiple pieces and forming the longitudinal axis of the spacer in parallel with the flowing direction of the liquid crystal substance. CONSTITUTION: The first substrate and the second substrate(100,200) are attached by a seal member(400). Multiple dam spacers(500) are arranged along with the boundary between a displaying area and a non-displaying area on one among the first substrate or the second substrate. The longitudinal axis of the dam spacer is formed vertically with the arranged direction of the dam spacer.

Description

Liquid Crystal Display Panel {LIQUID CRYSTAL DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel, and more particularly, to a narrow bezel type liquid crystal display panel in which ripple defects generated on a screen by external force are improved.

Currently, in the field of display devices, new image display devices have been developed to improve disadvantages such as low resolution, heavy weight, and large volume, such as conventional cathode ray tubes (CRTs). Various flat panel display devices such as LCD, Liquid Crystal Display Device (OLED), Organic Light Emitting Diode (OLED), Plasma Panel Display Device (PDP), etc. are attracting attention.

Among them, the liquid crystal display is one of the most representative flat panel display devices that are widely used from small portable devices to large TVs.

A general liquid crystal display device is largely composed of a liquid crystal display panel, a driving circuit unit, and a backlight unit. The liquid crystal display panel includes a first substrate including a plurality of switching elements, a second substrate on which a color filter is formed, and a liquid crystal layer interposed between the two substrates. The driving circuit unit includes a plurality of driving ICs for controlling the liquid crystal panel and supplying an image signal. The backlight unit serves to provide light to the liquid crystal panel.

In particular, the aforementioned liquid crystal display panel arranges liquid crystal materials having dielectric anisotropy and refractive index anisotropy between two electrodes, forms an electric field between the two electrodes, and controls the amount of light incident from the rear surface through controlling the intensity thereof. The image to be displayed is implemented. Therefore, the cell gap of the liquid crystal layer has a great influence on the image quality, and the cell gap in the entire area of the liquid crystal display panel should be designed to maintain a constant width at all times. To this end, spacers are formed in all areas of the liquid crystal display panel.

The above-described spacer is formed in the display area in which an image is displayed in the liquid crystal display panel to maintain a cell gap, and is formed in a non-display area outside the display area to reduce the amount of liquid crystal required. It is divided into a dam spacer which allows the liquid crystal to flow to the outside of the display area when the liquid crystal expands according to an external temperature change.

1 is a plan view illustrating a structure of a general liquid crystal display panel, and FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

As shown in the drawing, the liquid crystal display panel includes a first area and a first area that form an active area (A / A) for displaying an image and a non-active area (N / A) defined as an outer portion of the display area. 2 substrates (10, 20).

The first substrate 10 has a protective layer 13 and various electrodes 14 formed thereon to protect elements formed on the substrate, and faces the second substrate 20 with a gap spacer 15 therebetween. Is placed. The black matrix 21 and the color filter 22 are formed on the second substrate 20, and an overcoat layer 23 for planarization is formed thereon.

The first and second substrates 10 and 20 having such a structure are bonded to face each other at a predetermined distance, and the liquid crystal layer 30 is interposed therebetween. The dam is sealed inside the seal member 40 along the outer side of the first substrate 10, and is included in the non-display area N / N inside the seal member 40, and the liquid crystal flows. The spacer 50 is formed.

However, in recent liquid crystal display panels, screen ripple defects caused by the dam spacer 50 described above have occurred. As the liquid crystal display device becomes thinner and lighter, the width of the bezel included in the non-display area (N / N) where no image is displayed is minimized, but the GIP (Gate) in which some driving circuits are mounted in the liquid crystal panel is used. With the introduction of the In Panel method, the liquid crystal margin area between the seal member 40 and the dam spacer 50 increases, so that the liquid crystal material flows over the dam spacer 50 even when a slight external force is applied to the edge of the liquid crystal panel. It is not easy to return to the display area A / A afterwards.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a liquid crystal display panel which improves a screen ripple defect caused by a dam spacer when an external force is applied to a corner portion of a narrow bezel type liquid crystal display panel. There is this.

In order to achieve the above object, the liquid crystal display panel according to a preferred embodiment of the present invention, the first and the second is bonded to face each other through the seal member, the display area and the non-display area surrounding the display area is formed; 2 substrates; And a dam spacer disposed on one of the first and second substrates along a boundary between the display area and the non-display area, and having a long axis perpendicular to the array direction.

A column spacer may be formed in the display area to maintain cell gaps between the first and second substrates, and the dam spacer may be formed to have the same height as the column spacer.

The dam spacer may be formed to correspond to the black matrix formed in the non-display area on the second substrate.

The display area includes a plurality of gate wires and data wires arranged in a matrix to define a pixel area at an intersection point, and the non-display area includes a plurality of first wires electrically connecting the driver and the data wires at one end thereof. A first region in which the ITO jumping pattern is formed; A second region in which a plurality of connection wirings, circuit patterns, and ITO jumping patterns are formed to be connected to the gate wiring; And a third region formed including an ITO jumping pattern connected to the data line.

The circuit pattern on the second region may include one stage of a shift register having a GIP structure for generating a gate driving signal.

The dam spacer formed on the second region is formed in a space between the stages of the shift register.

The dam spacer formed on the second region is formed of first to third divisions in the long axis direction, and the first to third divisions have lengths of 1125 to 1145 um, 1157 to 1185 um, and 485 to 505 um, respectively. The length of the short axis is 25um ~ 35um, characterized in that the distance between the adjacent dam spacer is formed to less than 246.75um.

The ITO jumping pattern is disposed between the first to third divisions.

The dam spacers on the first and second regions have a long axis length of 1157 to 1177 um, a short axis length of 75um to 85um, and a distance between neighboring dam spacers of 473.5 um or less.

The ITO jumping pattern may further include an antistatic pattern.

According to a preferred embodiment of the present invention, the dam spacer formed in the narrow bezel-type liquid crystal display panel is divided into a plurality of, and the long axis is formed to be parallel to the flow direction of the liquid crystal material to minimize the flow constraint of the liquid crystal material, By supporting the pressing of the panel, there is an effect of providing a liquid crystal display panel with improved screen ripple defect.

1 is a plan view illustrating a structure of a general liquid crystal display panel.
FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.
3 is a plan view illustrating a structure of a liquid crystal display panel according to an exemplary embodiment of the present invention.
4 is a cross-sectional view taken along the line III-III ′ of FIG. 3.
5A to 5C are enlarged views of portions A, B, and C of FIG. 3.

Hereinafter, a liquid crystal display panel according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. The drawings referred to with reference to the following embodiments are not intended to limit the connection form and arrangement of the components to the illustrated forms, in particular the scale of some components in order to clarify the technical structure and shape of the present invention. Is exaggerated or reduced.

3 is a plan view illustrating a structure of a liquid crystal display panel according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line III-III ′ of FIG. 3.

As shown in the drawing, the liquid crystal display panel includes a first area and a first area that form an active area (A / A) for displaying an image and a non-active area (N / A) defined as an outer portion of the display area. And two substrates 100 and 200.

The first substrate 100 is provided with a protective layer 130 and various electrodes 140 to protect the elements formed on the substrate. On the first substrate 100, a plurality of switching elements, various wirings, and electrodes 140 representing actual images are provided.

In detail, a plurality of gate lines and data lines intersecting in a matrix form are formed in the first substrate 100, and a plurality of pixels are defined at intersections thereof. Each pixel is formed with a switching element electrically connected to the gate line and the data line. The switching element includes a gate electrode connected to the gate wiring, a source electrode connected to the data wiring, a drain electrode spaced apart from the source electrode, and connected to the pixel electrode, and a semiconductor layer disposed between the gate electrode, the source and the drain electrode. The thin film transistor is configured.

In addition, a common electrode facing the pixel electrode described above is formed on the first substrate 100, and an image is realized by switching the light transmittance of the liquid crystal material according to the electric field between the two electrodes. The passivation layer 130 covering the entire surface of the substrate is formed on the thin film transistor, various wirings, and electrodes. Here, the above-described structure in which the pixel electrode and the common electrode are formed on the first substrate 100 has been described as an example of an in-plane switching mode (IPS mode) in which the viewing angle characteristic of the liquid crystal display panel is improved. The spacer structure of the present invention may also be applied to a liquid crystal display panel in a twisted nematic mode in which a common electrode is formed on the entire surface of the second substrate 200.

The second substrate 200 is disposed to face the first substrate 100 at a predetermined distance, and a black matrix 210 and a color filter 220 are formed on one surface of the second substrate 200. Here, the black matrix 210 may be formed of a chromium / chromium oxide double layer having a light shielding property or an organic film made of carbon black, titanium oxide, or the like.

The column spacer 150 is formed between the first and second substrates 100 and 200 having the above-described structure to maintain the separation distance. The column spacer 150 is formed in parallel with the black matrix 210 formed on the second substrate 200 in order to prevent a decrease in the aperture ratio of the liquid crystal display. An overcoat layer 230 for planarization is formed between the column spacer 150 and the black matrix 210.

In addition, as described above, a space is formed between the first substrate 100 and the second substrate 200 to inject the liquid crystal layer 300. The liquid crystal layer 300 is bordered by a seal member 400 applied to either the first substrate 100 or the second substrate 200, and the two substrates are bonded to each other by the seal member 400. Is sealed.

The column spacer 150 formed in the display area (A / A) of the liquid crystal display panel manufactured by the bonding of the two substrates is a photolithography process defined by a patterning process using a photoresist, a photosensitive material. It is formed by a photolithography process, and as described above, a plurality of cells are formed to be spaced apart from each other at regular intervals so as to maintain a constant cell gap in the display area A / A. Acrylic material may be used as the material of the column spacer 150, or may be formed by directly exposing and developing the photosensitive organic material without a photoresist using the photosensitive organic material.

In addition, the liquid crystal is disposed inside the seal member 400 and adjacent to the boundary area between the display area A / A and the non-display area N / N, apart from the column spacer 150, to secure the flow path of the liquid crystal. And a dam spacer 500 for maintaining edge rigidity of the liquid crystal display panel 100.

The above-described dam spacer 500 is formed in plural along the above-described boundary region, and in particular, the long axis of the dam spacer 500 is formed perpendicular to the direction in which the dam spacer 500 is arranged.

The dam spacer 500 may be formed of the same material in the same process as the column spacer 150 on the display area A / A. Accordingly, the dam spacer 500 may be directly exposed and exposed without using a photoresist using acrylic organic or photosensitive organic materials. It can be formed by the development. In addition, similarly to the column spacer 150 described above, it is formed to correspond to the position of the black matrix 210 of the second substrate 200.

In particular, the dam spacer 500 of the present invention abuts on both substrates in the same manner as the column spacer 150, unlike the prior art, and thus the liquid crystal display panel ( It is possible to efficiently support the outer pressing of the 100). In addition, the long axis of the dam spacer 500 is disposed in parallel to the moving direction of the liquid crystal material and the liquid crystal between the display area (A / A) and the non-display area (N / A) through the spaced space between the dam spacer (500). The flow of the material 300 becomes easier and even if the liquid crystal material 300 moves to any one region as the outer pressing is performed, the liquid 300 is returned to its original position and thus the liquid crystal is not filled.

 Hereinafter, a structure of a dam spacer formed in a liquid crystal display panel according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

5A to 5C are enlarged views of portions A, B, and C of FIG. 3. In the following description, the parts A, B, and C are divided into first to third regions, respectively.

First, referring to FIG. 5A, the dam spacer 500a on the first area of the liquid crystal display panel of the present invention is adjacent to the boundary between the display area A / A and the non-display area N / A. A plurality of the inside of the seal member is arranged side by side along the upper outer portion of the liquid crystal display panel.

In the display area A / A, a pixel P defined at a point where the gate line and the data line intersect is formed, and a dummy is formed in the non-display area N / A surrounding the display area A / A. The pattern DP, the link wiring LL and the ITO jumping pattern JP are formed. In addition, a plurality of dam spacers 500a are formed on the non-display area N / A to be arranged side by side across the dummy pattern DP and the link wiring LL. Here, the ITO jumping pattern JP may include an ESD circuit pattern that prevents damage of the device due to static electricity.

The dam spacers 500a are formed to have a long axis extending longitudinally, that is, in a direction perpendicular to a direction in which a plurality of dam spacers are disposed, and are spaced apart from each other so as to secure a space with a predetermined width between the spacers 500a. When an external force is applied to the outer portion of the liquid crystal display panel due to the space between the two dam spacers 500a, the dam spacer 500a supports the pressing of the second substrate and maintains the gap between the substrates. The liquid crystal material moved in the area A / A direction becomes a passage to facilitate the return to the non-display area N / A.

In particular, in the non-display area N / A, a dummy pattern, pads and wirings for transmitting various signals supplied to the pixels defined in the display area A / A are formed, and the dam spacer 500a may be formed. It is formed over the dummy pattern DP and the link wiring LL which electrically connect the data wiring and the data driver. Here, the above-described link wiring LL is connected to the ITO jumping pattern JP connected to the pixel region and in order to prevent electrical interference with the ITO jumping pattern JP, the dam spacer 500a is not overlapped with at least ITO. It is arranged to avoid the area where the jumping pattern JP is formed.

The dam spacer 500a formed in the first region described above has a length w1 of 1157 to 1177 um on a long axis, a length of 75um to 85um on a short axis d1, and a distance g1 between adjacent dam spacers of 473.5 um or less. It is preferably formed.

Hereinafter, a structure of a dam spacer formed on a second area of a liquid crystal display according to an exemplary embodiment of the present invention will be described with reference to the drawings.

FIG. 5B is a diagram illustrating a structure of a second region of a liquid crystal display module according to an exemplary embodiment of the present invention and a dam spacer formed therein.

As shown, the dam spacer 500b on the second region of the present invention has a gate-in-panel type liquid crystal display in which the gate driver 180 is implemented as a thin film transistor on the first substrate. It is applied to the panel and is formed by avoiding the shift register forming each stage of the gate driver 180.

In detail, the gate driver 180 is a shift register electrically connected to a gate wiring (not shown) of the pixel region and applying a gate driving signal for each gate wiring. The gate driver 180 includes a plurality of stages and is provided to a control signal input thereto. By this, one stage is enabled and the gate driving signals are sequentially output.

The gate driver 180 includes a shift register unit including an external dummy pattern DP, a pad 181 for receiving a clock signal from the outside, and a plurality of thin film transistors 182 connected to the pad 181. And a wiring portion LA for electrically connecting the gate wiring of the pixel region and the shift register portion SA. Here, an ITO jumping pattern JP is formed between the dummy pattern DP and the shift register part SA and between the shift register part SA and the wiring part LA to electrically connect the respective regions.

In particular, the dam spacer 500b formed on the second region is formed in a space between the stages of the shift register part SA between the dummy pattern DP and the wiring part LA. The first to third dividing units 510 to 530 are divided.

The first division part 510 has a length w21 of 1125 μm to 1145 μm, the second division part 520 has a length w22 of 1157 to 1185 μm of a long axis, and the third division part 530 of The length w32 of the major axis is formed in 485 ~ 505um. In addition, it is preferable that each of the divided parts 510 to 530 has a short length d2 of 25 μm to 35 μm.

The distance between the adjacent dam spacers 500b is preferably formed to be 246.75um or less within a range not overlapping with the thin film transistor 182 or the like.

Hereinafter, a structure of a dam spacer formed on a third region of a liquid crystal display according to an exemplary embodiment of the present invention will be described with reference to the drawings.

FIG. 5C is a diagram illustrating a structure of a third region of a liquid crystal display module and a dam spacer formed therein according to an exemplary embodiment of the present invention.

As shown, a plurality of dam spacers 500c on the third region of the liquid crystal display panel of the present invention are arranged side by side along the lower outer portion of the liquid crystal display panel inside the seal member on the non-display area N / A. Will be.

In the non-display area N / A, an ITO jumping pattern JP is formed to be connected to the pixels of the display area A / A. A dummy pattern DP is formed outside the ITO jumping pattern JP. have. The ITO jumping pattern JP may include an ESD circuit pattern that prevents damage of the device due to static electricity.

In addition, a plurality of dam spacers 500c are disposed on the dummy pattern DP. The dam spacers 500c are formed to have a long axis extending longitudinally, that is, in a direction perpendicular to a direction in which a plurality of dam spacers are disposed, and are spaced apart from each other in order to secure a space with a predetermined width between the spacers 500c. When an external force is applied to the outer portion of the liquid crystal display panel by the space between the two dam spacers 500c, the dam spacer 500c supports the pressing of the second substrate and maintains the gap between the substrates. The liquid crystal material moved in the area A / A direction becomes a passage to facilitate the return to the non-display area N / A.

In addition, an ITO jumping pattern JP connected to the data line is formed in the non-display area N / A, and the dam spacer 500c may include a dam spacer (I) to prevent electrical interference with the ITO jumping pattern JP. 500c is disposed to avoid at least the region where the ITO jumping pattern JP is formed so as not to overlap.

The dam spacer 500c formed in the third region of the structure has a length w3 of 1157 to 1177 um on a long axis, a length of 75um to 85um on a short axis d3, and a distance g3 between adjacent dam spacers of 473.5 um or less. It is preferable to form.

As described above, when the area occupied by the dam spacers 500a, b, and c in the non-display area N / A increases, the area occupied by the liquid crystal material in the non-display area N / A decreases. . In addition, when dam spacers 500a, b, and c are avoided and disposed to minimize an area overlapping with various circuit patterns and wirings in the non-display area N / A, Signal interference such as parasitic capacitance generated between the circuit pattern and the wiring can be minimized.

Accordingly, the signal interference due to the RC delay can be prevented by improving signal driving between the dam spacer, the circuit pattern, and the wiring in the non-display area N / A, thereby improving driving characteristics of the liquid crystal display.

In addition, the structure of the above-described dam spacer is not limited to the structure shown in the drawing, and minimizes the overlapping portion with the dam spacer in the non-display area (N / A), the separation between a plurality of non-rectangular dam spacers Any form of space can be applied.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

100: first substrate 130: protective layer
140: wiring and electrode 150: column spacer
200: second substrate 210: black matrix
220: color filter 230: overcoat layer
300: liquid crystal layer 400: seal member
500: Dam spacer

Claims (10)

First and second substrates bonded to each other through the seal member and having a display area and a non-display area surrounding the display area; And
A plurality of dam spacers are disposed in any one of the first and second substrates along a boundary between the display area and the non-display area and have a long axis perpendicular to the array direction.
Liquid crystal display panel comprising a. The method of claim 1,
Column spacers are formed in the display area to maintain cell gaps of the first and second substrates.
The dam spacer,
And a liquid crystal display panel having the same height as the column spacer. The method of claim 1,
And the dam spacer is formed in correspondence with the black matrix formed in the non-display area on the second substrate. The method of claim 1,
In the display area, a plurality of gate lines and data lines are arranged in a matrix to define a pixel area at an intersection point.
The non-display area,
A first region in which a plurality of first wirings and an ITO jumping pattern are electrically connected between a driving circuit unit provided at one end and the data wiring;
A second region in which a plurality of connection wirings, circuit patterns, and ITO jumping patterns are formed to be connected to the gate wiring; And
A third region including an ITO jumping pattern connected to the data line
Liquid crystal display panel comprising a. The method of claim 4, wherein
And the circuit pattern on the second region includes one stage of a shift register having a GIP structure for generating a gate driving signal. The method of claim 5, wherein
And a dam spacer formed on the second region, wherein the dam spacer is formed in a space between the stages of the shift register. The method according to claim 6,
The dam spacer formed on the second region,
It is formed by the first to third divisions in the major axis direction,
The first to the third divisions, the length of the long axis is 1125 ~ 1145um, 1157 ~ 1185um and 485 ~ 505um, respectively, the length of the short axis is 25um ~ 35um, the distance between the adjacent dam spacer is formed to 246.75um or less Liquid crystal display panel characterized in that. The method of claim 7, wherein
And the ITO jumping pattern is disposed between the first to third divisions. The method of claim 4, wherein
The dam spacers on the first and second regions have a long axis of 1157 to 1177 um, a short axis of 75 to 85 um, and a distance between neighboring dam spacers of 473.5 um or less. . The method of claim 4, wherein
The ITO jumping pattern further comprises an antistatic pattern.

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