KR20160034593A - Liquid crystal display panel and liquid crystal display device containing the same - Google Patents

Abstract

Disclosed are a liquid crystal display panel and a liquid crystal display apparatus including the same. According to the present invention, the liquid crystal display panel includes: a first substrate having a pixel electrode, a data line, and a scan line formed thereon; a second substrate facing the first substrate; a first alignment layer disposed on the first substrate, the pixel electrode, the data line, and the scan line; and a liquid crystal layer disposed between the first substrate and the second substrate. The first alignment layer disposed on the pixel electrode has a first thickness, and the first alignment layer disposed on at least one from the scan line and the data line has a second thickness, wherein the first thickness is greater than the second thickness. The present invention can solve a problem of the disclination of liquid crystal molecules, thereby improving display quality of the liquid crystal display panel.

Description

[0001] The present invention relates to a liquid crystal display panel and a liquid crystal display (LCD)

The present invention relates to a liquid crystal display panel and a liquid crystal display device including the same, and more particularly, to a liquid crystal display panel having an orientation layer of a new structure and a liquid crystal display device including the same.

In recent years, as display techniques have developed, all display devices have been developed to be bulky, thin and lightweight. Since liquid crystal display (LCD) devices are thinner flat display devices, conventional cathode ray tube (CRT) displays are increasingly being replaced by LCDs. In particular, LCDs can be applied to various fields. For example, everyday devices such as cell phones, laptops, video cameras, cameras, music players, navigation devices, and televisions include liquid crystal display (LCD) panels.

Brightness, contrast, hue, and viewing angle are key variables related to the field effect of LCD panels. Along with the development of LCD devices, mainstreams for developing LCD panels are divided into twisted nematic (TN), vertical alignment (VA), and in-plane switching (IPS).

In the case of a VA type LCD panel, the orientation layer can facilitate the orientation of the injected liquid crystal molecules in order to attain the purpose of exhibiting darkness and brightness. However, the thin film transistor (TFT) substrate and the color filter (CF) substrate have a pattern, and a uniformly coated orientation layer causes a height (or height) difference on the surface of the orientation layer. This elevation difference may cause nonuniform rubbing of the alignment layer or monomer coagulation, and the alignment of the liquid crystal molecules can not be made sufficiently ideal.

Therefore, it is desirable to provide a liquid crystal display panel without problems of non-uniform rubbing of the alignment layer or monomer aggregation in order to solve the disclination problem of the liquid crystal molecules and to improve the display quality of the liquid crystal display panel.

It is an object of the present invention to provide a liquid crystal display panel and a liquid crystal display device including the liquid crystal display panel, and solve the problem of the liquid crystal molecules being distorted, thereby improving the display quality of the liquid crystal display panel and the device including the same.

Another object of the present invention is to provide a method of manufacturing the above-described liquid crystal display panel.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a first substrate on which a pixel electrode, a data line, and a scan line are formed; A second substrate facing the first substrate; A first alignment layer disposed on the first substrate, the pixel electrode, the data line, and the scan line; And a liquid crystal layer disposed between the first substrate and the second substrate. Wherein the first alignment layer disposed on the pixel electrode has a first thickness and the first alignment layer disposed on at least one of the scan line and the data line has a second thickness, Is greater than the second thickness.

In general, the thickness of the data line and / or the scan line of the liquid crystal display panel is larger than the thickness of the pixel electrode. In the liquid crystal display panel of the present invention, the first thickness of the first alignment layer on the pixel electrode is set larger than the thickness of the first alignment layer on the data line and / or the scan line. Therefore, the height (height) difference of the surface of the first alignment layer on the pixel electrode and the data line and / or the scan line can be minimized, so that irregular rubbing or monomer flocculation problems of the first alignment layer can be prevented The display quality of the liquid crystal display panel can be improved.

Further, according to the present invention,

Providing a first substrate and a second substrate, wherein a pixel electrode, a data line, and a scan line are disposed on the first substrate and the second substrate is opposite the first substrate;

Forming a first alignment layer disposed on the first substrate, the data line, the scan line, and the pixel electrode, wherein the first alignment layer disposed on the pixel electrode has a first thickness, The first orientation layer disposed on at least one of the lines has a second thickness, and wherein the first thickness is greater than the second thickness; And

And a step of injecting a liquid crystal layer between the first substrate and the second substrate. .

In the method of the present invention, the alignment layer may be patterned to have a different thickness through a patterning method as is conventional in the art. For example, a patterned orientation layer can be produced through direct printing using a printing plate such as an APR plate having a specific microstructure; An alignment layer having a uniform thickness is first formed, and then photolithography is performed thereon to form a patterned alignment layer; Or an alignment layer having a uniform thickness is first formed, printed before curing, and then cured to form a patterned alignment layer. However, the method used for producing the patterned alignment layer of the present invention is not limited to the above-described method.

In the liquid crystal display panel and the manufacturing method thereof according to the present invention, the problem of the liquid crystal molecules being distorted is that the first thickness (T1) of the first alignment layer on the pixel electrode is smaller than the second thickness of the first alignment layer on the data line and / (T2). ≪ / RTI > Preferably, the ratio of the first thickness to the second thickness (T1 / T2) is in the range of 1 to 10 (1? T1 / T2? 10). More preferably, the ratio is in the range of 1 to 5 (1? T1 / T2? 5). Most preferably, the ratio is in the range of 2 to 4 (2? T1 / T2? 4). However, the ratio can be adjusted according to the distance between the surface of the first substrate and the scan line as well as the pixel electrode and the data line, and is not limited to the above-described range.

In the liquid crystal display panel and the manufacturing method thereof of the present invention, the color filter unit and the black matrix may also be disposed on the second substrate. Additionally, a second alignment layer may also be disposed on the black matrix with the color filter unit. Here, the second alignment layer on the color filter unit has a fourth thickness, the second alignment layer on the black matrix has a fifth thickness, and the fourth thickness is thinner than the fifth thickness. In some aspects, the thickness of the second alignment layer on the portion of the color filter unit that overlaps the black matrix is less than the thickness of the second alignment layer on the portion of the color filter unit that does not overlap the black matrix .

In the liquid crystal display panel and the manufacturing method thereof according to the present invention, at least one spacer may be disposed on the first substrate or the second substrate, and is preferably disposed on the second substrate. When the first substrate and the second substrate are assembled with each other, the spacer therebetween may provide a predetermined space for injecting liquid crystal molecules. When the spacer is disposed on the first substrate, the first orientation layer covers the spacer and has a third thickness that is thinner than the first thickness and the second thickness. More preferably, the spacer is disposed on the second substrate, and the second alignment layer has a third thickness that covers the spacer and is smaller than the fourth thickness and the fifth thickness of the second alignment layer. On the other hand, the third thickness is smaller than the first thickness and the second thickness. In some cases, the third thickness of the orientation layer on the spacer is close to 0 nm; That is, the third thickness of the orientation layer on the spacer is difficult to detect.

In the liquid crystal display panel and the manufacturing method thereof of the present invention, the thin film transistor unit may also be disposed on the first substrate. Here, the thin film transistor unit includes a gate electrode, an insulating layer, a semiconductor layer, a source electrode and a drain electrode, the insulating layer covers the gate electrode, the semiconductor layer is disposed on the insulating layer, And the drain electrode are disposed on the semiconductor layer and separated by a predetermined distance to form a channel region. The first orientation layer is disposed on the thin film transistor unit, and has a sixth thickness on the source electrode and the drain electrode, a seventh thickness in the channel region, and the sixth thickness is the seventh thickness Thinner than.

In addition, in the liquid crystal display panel and the manufacturing method thereof of the present invention, a protective layer is further disposed on the first substrate to cover the data line, the scan line, and the thin film transistor unit. The protective layer has an opening exposing a drain electrode of the thin film transistor unit, and a pixel electrode is disposed on the protection layer and extends to the hole to electrically connect to the drain electrode. The first alignment layer in the hole has an eighth thickness and the sixth thickness of the first alignment layer on the drain electrode (more specifically, on the pixel electrode above the drain electrode) is thinner than the eighth thickness thereof .

In the liquid crystal display panel and the method of manufacturing the same according to the present invention, the first alignment layer may be formed only in the region where the thin film transistor unit is disposed (more specifically, the region where the thin film transistor unit is not formed and the pixel electrode is disposed) 1 thickness, which is greater than the sixth thickness.

In the liquid crystal display panel and the manufacturing method thereof according to the present invention, the material for the alignment layer (including the first alignment layer and the second alignment layer) is not particularly limited, and polyimide (PI), polyvinyl cinnamate (PVCN) And polymethylmethacrylate (PMMA), which are commonly used in the art; However, the present invention is not limited to these. Preferably, the material for the orientation layer of the present invention is PI.

In the liquid crystal display panel and the manufacturing method thereof of the present invention, not only the thickness of the orientation layer (including the first orientation layer and the second orientation layer) can be changed but also at least one protrusion, at least one hump or Combinations thereof may also be formed on the surface of the orientation layer. Preferably, the first substrate includes a display area and a non-display area, and the projections and protrusions described above are disposed on a first alignment layer corresponding to a non-display area of the first substrate. The second substrate may also include a display area and a non-display area, each of which corresponds to a display area and a non-display area of the first substrate; The above-mentioned projections and protrusions are also disposed on the second alignment layer corresponding to the non-display area of the second substrate. Preferably, the projections and protrusions described above are disposed on a periphery region of the first alignment layer and / or the second alignment layer. The arrangement of the protrusions and protrusions can increase the pressure applied by the alignment layer to the substrate (including the first substrate and the second substrate) to increase the adhesion between the alignment layer and the substrate. In addition, the above arrangement can solve the problem of shrinkage of the orientation layer during the overflow and curing process of the material for producing an orientation layer, and thus the variation of the orientation layer can be suppressed.

Here, in the first orientation layer and the second orientation layer, the material of the orientation layer is the same as the material of the protrusions and / or protrusions. Further, the projections or protrusions are integrated with the alignment layer. In the present invention, the alignment layer and the protrusions and / or protrusions can be formed simultaneously or individually using a transfer plate or a photomask having a specific structure corresponding to the protrusions and / or protrusions. Here, the term "protrusion " means a protruding unit having a height of more than 30 nm from the top of the alignment layer to the surface; The term " protrusion "also means having a height of less than 30 nm. Further, the projections of the present invention have a structure similar to a non-planar surface or ridges.

In the liquid crystal display panel and the manufacturing method thereof of the present invention, the viscosity of the orientation layer material is related to the degree of polymerization or type of the polymer used. For example, the orientation layer material has a higher viscosity as the degree of polymerization of the polymer used increases. Therefore, in one embodiment of the present invention, an orientation layer can be formed using a high-viscosity material such as a polymer having a high molecular weight. In this case, at least one protrusion, at least one protrusion, or a combination thereof may be formed on the surface of the orientation layer; Preferably, both the protrusions and protrusions are formed on the surface of the alignment layer. When the projection is formed on the surface of the alignment layer, the ratio of the height of the projection relative to the thickness of the first alignment layer adjacent to the projection (more particularly, the height from the top of the projection to the surface of the alignment layer) to be. In another aspect of the present invention, an orientation layer can be formed using a material having a low viscosity such as a polymer having a small molecular weight. In this case, protrusions are formed on the surface of the orientation layer; In addition, the edge of the first orientation layer may also have a wave structure. Here, the term " wave structure "may include an arc shape, a zigzag shape, a curved shape, or a combination thereof.

In the liquid crystal display panel and the manufacturing method thereof of the present invention, the orientation layer (including the first orientation layer and the second orientation layer) may optionally include a plurality of particles, wherein the particles in the non- Is larger than the particles present. Here, the term "particles" includes nuclei, crystals, granules or agglomerates as long as a substantial amount of the particles formed in the orientation layer belong to the definition of the particles of the present invention. In particular, in some aspects of the present invention, not only can the protrusion be formed using a transfer plate or photomask having a specific microstructure, but also the protrusion may be formed due to agglomeration of a plurality of particles.

Further, in the liquid crystal display panel and the manufacturing method thereof of the present invention, a sealant is used to assemble the first substrate and the second substrate. Accordingly, the liquid crystal display panel of the present invention may also include a sealant disposed between the first substrate and the second substrate, and optionally also covering a part of the alignment layer. More particularly, the sealant selectively covers the peripheral region of the orientation layer. When the protrusions and / or protrusions are formed on the orientation layer, the sealant preferably covers a part of the protrusions and / or protrusions. The arrangement of the protrusions and / or protrusions can increase the contact area between the sealant and the orientation layer, and thus the problem of peeling of the sealant from the orientation layer can be improved.

The present invention also provides a backlight module comprising: a backlight module; And a liquid crystal display panel described above disposed on the backlight module.

Other objects, advantages and novel features of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

1 is a perspective view of a liquid crystal panel according to a preferred embodiment of the present invention;
2 is a perspective view illustrating a thin film transistor substrate according to a preferred embodiment of the present invention;
3 is a cross-sectional view illustrating a thin film transistor substrate according to a preferred embodiment of the present invention;
4A-4B are enlarged cross-sectional views showing a part of a thin film transistor substrate according to a preferred embodiment of the present invention;
5 is a sectional view showing a color filter substrate according to a preferred embodiment of the present invention;
Figure 6 is a perspective view showing a first orientation layer on a thin film transistor substrate according to a preferred embodiment of the present invention;
Figures 7A-7D are cross-sectional views illustrating a first orientation layer in a non-display area according to a preferred embodiment of the present invention;
8A-8C are cross-sectional views illustrating a first orientation layer in a non-display region according to a preferred embodiment of the present invention;
9A is a perspective view showing a first orientation layer and a sealant in accordance with a preferred embodiment of the present invention;
Figure 9b is a perspective view showing a first orientation layer and a sealant in accordance with another preferred embodiment of the present invention;
10 is a perspective view showing a first orientation layer according to a preferred embodiment of the present invention;
11 is a perspective view showing a first orientation layer on a thin film transistor substrate according to another preferred embodiment of the present invention; In addition
12 is a perspective view showing a liquid crystal display device of the present invention.

It is to be understood that the invention has been described in an illustrative manner, and that the terminology used is for the purpose of description rather than limitation. Many modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.

1 is a perspective view of a liquid crystal panel according to a preferred embodiment of the present invention. The liquid crystal display panel of the embodiment of the present invention includes a thin film transistor (TFT) substrate 1, a color filter (CF) substrate 2, a plurality of spacers 3, a liquid crystal layer 4 and a sealing agent 5 do. The TFT substrate 1 and the CF substrate 2 are opposed to each other and the spacer 3 and the liquid crystal layer 4 are disposed between the TFT substrate 1 and the CF substrate 2, (1) and the CF substrate (2) are assembled to each other by the sealant (5). Detailed units disposed on the TFT substrate 1 and the CF substrate 2 are not shown in Fig. Hereinafter, the units arranged on the TFT substrate 1 and the CF substrate 2 and the manufacturing method thereof will be described in detail below.

2 is a perspective view showing a TFT substrate of a liquid crystal display panel of an embodiment of the present invention; 3 is a cross-sectional view taken along the line A-A 'in Fig. 2, showing a TFT substrate and a structure formed thereon. The TFT substrate of the present embodiment has a structure in which a first substrate on which a scan line 12, a data line 13, a thin film transistor (TFT) unit 14, a pixel electrode 15, and a capacitor electrode 17 are formed . Here, the pixel unit is defined as having two adjacent scan lines 12 and two adjacent data lines 13, and includes a TFT unit 14, a pixel electrode 15, and a capacitor electrode 17 And the pixel electrode 15 is disposed between two adjacent scan lines 12 and two adjacent data lines 13. [ Here, the scan line 12, the data line 13, and the capacitor electrode 17 may be formed of a metal, an alloy, a metal oxide, a metal oxide, or other electrode material used in the art, Material, preferably a metal.

3, the TFT substrate of the present embodiment includes a first substrate 11, a data line 13, a scan line (not shown in the figure), and a TFT unit 14, A data line 13, a scan line (not shown in the figure), and a TFT unit 14 are disposed on the first substrate 11. The TFT unit 14 includes a gate electrode 141 disposed on the first substrate 11; An insulating layer 142 (also referred to as a gate insulating layer) covering the gate electrode 141 and the first substrate 11; A semiconductor layer (143) disposed on the insulating layer (142); And a source electrode 1441 and a drain electrode 1442 disposed in the semiconductor layer 143 and separated by a predetermined distance to form a channel region 1443. Here, the insulating layer 142 also covers the data line 13 and the scan line (not shown). In the embodiment of the present invention, the TFT unit 14 can be manufactured by a usual process generally used in the art, and therefore the process is not shown here. Also, the first substrate 11 may be a substrate commonly used in the art, such as a glass substrate, a plastic substrate, a silicon substrate, and a ceramic substrate. In addition, the material of the gate electrode 141 may be a conductive material generally used in the art, such as a metal, an alloy, a metal oxide, a metal oxide, or other electrode material used in the art, and is preferably a metal. However, the present invention is not limited thereto. The material of the insulating layer 142 may be an insulating material commonly used in the art such as SiN; The material of the semiconductor layer 143 may be a semiconductor material commonly used in the art including organic materials such as amorphous silicon, polysilicon, P13, DH4T, and pentacene, but the present invention is not limited thereto.

3, after the data line 13, the scan line (not shown in the figure), and the TFT unit 14 are formed, a first passivation layer 145 is formed to form the data line 13, , A scan line (not shown in the figure), and the TFT unit 14. [ Here, a hole 1451 is formed in the protective layer 145 to expose the drain electrode 1442. The pixel electrode 15 is disposed on the protective layer 145 and extends to the hole 1451 to electrically connect to the drain electrode 1442. Here, the material of the first passivation layer 145 may be a material commonly used as a passivation material in the art, such as SiOx. In addition, the pixel electrode 15 may be a patterned electrode generally used in the art, such as a dendrite-like electrode or a zigzag electrode. Further, the material thereof may be a transparent conductive material generally used in the art, such as a transparent conductive oxide including ITO or IZO.

Finally, as shown in FIG. 3, the second passivation layer 146 and the pixel electrode 15 are coated with photo alignment monomers. After the photo-alignment monomer is polymerized and cured, a first alignment layer 16 is formed. In an embodiment of the present invention, the first alignment layer 16 does not have a uniform thickness, and its thickness is adjusted according to the height (or height) of the unit under the first alignment layer 16. Therefore, the height difference of the upper surface of the first alignment layer 16 can be minimized. Here, a patterned alignment layer can be produced by direct printing using a printing plate such as an APR plate having a specific microstructure; An alignment layer having a uniform thickness is first formed, and then photolithography is performed thereon to form a patterned alignment layer; Or an alignment layer having a uniform thickness is first formed and printed so as to have a different thickness before curing, and then cured to form a patterned alignment layer. However, the method used for producing the patterned alignment layer of the present invention is not limited to the above-described method. After the above-described process, the TFT substrate of the embodiment of the present invention is completed. Hereinafter, the design of the first alignment layer 16 will be described in detail.

4A is an enlarged cross-sectional view showing a part of the TFT substrate of this embodiment. Wherein the first alignment layer 16 on the pixel electrode 15 has a first thickness T1 and the first alignment layer 16 on the data line 13 has a second thickness T2, The first thickness T1 is larger than the second thickness T2. Preferably, the ratio T1 / T2 of the first thickness T1 to the second thickness T2 is in the range of 1 to 10 (1? T1 / T2? 10). More preferably, the ratio is in the range of 1 to 5 (1? T1 / T2? 5). Most preferably, the ratio is in the range of 2 to 4 (2? T1 / T2? 4). In an embodiment of the present invention, the first thickness T1 may range from 0.1 μm to 0.2 μm, and the second thickness T2 may range from 0.01 μm to 0.08 μm. However, the thickness of the first alignment layer 16 may be set so that the thickness of the first alignment layer 16 decreases as the altitude (or height) of the unit under the alignment layer 16 increases The purpose of reducing the altitude difference of the upper surface of the first alignment layer 16 can be achieved. Here, although only the region containing the data lines is illustrated, the first alignment layer corresponding to the region containing the scan lines may also have a thickness design similar to the region containing the data lines.

4B is an enlarged cross-sectional view showing a region where the thin film transistor unit of the TFT substrate of this embodiment is disposed. The first alignment layer 16 has a sixth thickness T6 on the source electrode 1441 and the drain electrode 1442 and has a seventh thickness T7 on the channel region 1443, The sixth thickness T6 is thinner than the seventh thickness T7. The first alignment layer 16 has an eighth thickness T8 in the hole 1451 and the sixth thickness T6 of the first alignment layer 16 on the drain electrode 1442 has a thickness 8 Thicker than thickness (T8). The first alignment layer 16 is formed only in the region where the thin film transistor unit 14 is disposed (more specifically, the region where the thin film transistor unit 14 is not formed but the pixel electrode 15 is disposed) 1 thickness (T1), which is greater than the sixth thickness (T6).

4A and 4B, the thickness of the first orientation layer 16 is designed to decrease as the altitude of the unit under the first orientation layer 16 increases. Therefore, the height difference of the upper surface of the first alignment layer 16 can be minimized. Therefore, the problem of non-uniform rubbing or monomer aggregation of the first alignment layer 16 can be prevented, and the display quality of the liquid crystal display panel can be improved.

Next, Fig. 5 is a sectional view showing the CF substrate of the embodiment of the present invention. The CF substrate includes a second substrate 21, a color filter unit 22, and a black matrix 23. Here, the color filter unit 22 and the black matrix 23 are disposed on the second substrate 21, and the black matrix 23 is disposed between two adjacent color filter units 22 . Next, the protective layer 24, the common electrode layer 25 and the second alignment layer 26 are sequentially formed on the color filter unit 22 and the black matrix 23 to form the CF substrate of the embodiment of the present invention It completes. Here, the material of the protective layer 24 may be the same as the material of the protective layer 145 shown in Fig. 3, and therefore will not be described in detail. In addition, the common electrode layer 25 of the embodiment of the present invention may be a planar electrode layer commonly used in the art, and the material thereof may be a transparent conductive material commonly used in the art such as a transparent conductive oxide including ITO or IZO Lt; / RTI > Further, the second alignment layer 26 can be formed by the same method as the method of manufacturing the first alignment layer, and the manufacturing method thereof is not described herein. It should be noted that the second orientation layer 26 of the embodiment of the present invention may have a different thickness that is adjusted according to the height of the unit under the second orientation layer 26; Therefore, the height difference of the upper surface of the second alignment layer 26 can be minimized. Hereinafter, the design of the thickness of the second alignment layer 26 will be described in detail.

5, the second alignment layer 26 on the color filter unit 22 has a fourth thickness T4 and the second alignment layer 26 on the black matrix 23 has a fifth thickness (T5), and the fourth thickness (T4) is thinner than the fifth thickness (T5). Here, the fourth thickness T4 may be in the range of 0.01 μm to 0.08 μm, and the fifth thickness T5 may be in the range of 0.1 μm to 0.2 μm. However, the present invention is not limited to the above-described range as long as the thickness of the second alignment layer 26 decreases as the unit under the second alignment layer 26 increases. Therefore, the object of minimizing the altitude difference of the upper surface of the second alignment layer 26 can be achieved. Further, the color filter unit 22 covers a part of the black matrix 23. Here, the thickness T9 of the second alignment layer 26 on the part of the color filter unit 22 overlapping with the black matrix 23 is different from the thickness T9 of the color filter unit 22 which does not overlap with the black matrix 23 Is thinner than the thickness of the second orientation layer on the portion (i.e., the fourth thickness T4).

5, the liquid crystal display panel of the embodiment of the present invention also includes at least one spacer 3 disposed on the TFT substrate 1 and the CF substrate 2 (Fig. 1 As shown in FIG. More specifically, the spacer 3 is disposed on the second substrate 21 and corresponds to the black matrix 23; And the second alignment layer 26 covers the spacer 3. Here, the second orientation layer 26 on the spacer has a third thickness T3 that is thinner than the fourth thickness T4 and the fifth thickness T5. 3, the third thickness T3 is smaller than the thickness of the first alignment layer 16 on the pixel electrode 15 (as shown in FIG. 3) The first thickness T1 of the first alignment layer 16 on the data line 13 and the second thickness T2 of the first alignment layer 16 on the data line 13. [ In some embodiments, the third thickness T3 of the second orientation layer 26 on the spacer 3 is very thin and close to 0 nm; That is, the third thickness thereof is hard to be detected even by using a scanning electron microscope (SEM).

In the embodiment of the present invention, the material of the alignment layer (including the first alignment layer 16 and the second alignment layer 26) is not particularly limited, and polyimide (PI), polyvinyl cinnamate (PVCN) And polymethylmethacrylate (PMMA). ≪ RTI ID = 0.0 > [0040] < / RTI > However, the material is not limited thereto. Preferably, the orientation layer material of embodiments of the present invention is a PI having a high viscosity.

As shown in Fig. 1, after the TFT substrate 1 and the CF substrate 2 are manufactured, these two substrates are assembled and sealed by a sealant 5, liquid crystal molecules are injected thereinto, Layer 4 is formed to complete the liquid crystal display panel of the embodiment of the present invention. In order to improve adhesion between the sealant 5 and the first orientation layer 16 as well as the second orientation layer 26 (as shown in Figures 1, 3 and 5), the first orientation The periphery of the layer 16 and the second orientation layer 26 is designed to have a microstructure. Hereinafter, the microstructure of the periphery of the first alignment layer 16 and the second alignment layer 26 will be described in detail, and the periphery of the first alignment layer 16 and the second alignment layer 26 are the same or different. Can have different microstructures. Here, only the structure of the first alignment layer 16 is illustrated, and the structure of the second alignment layer 26 is not described below.

6 is a perspective view showing the first alignment layer on the TFT substrate in the liquid crystal display panel of the embodiment of the present invention. 6, in the liquid crystal display panel of the embodiment of the present invention, the first alignment layer 16 is disposed on the TFT substrate 1, and the protrusions 161 and the plurality of protrusions 162 are formed on the TFT substrate 1, Is also disposed on the periphery (P) of the first alignment layer (16). When the TFT substrate 1 is defined as having a display region D and a non-display region N, the protrusions 161 and the protrusions 162 are formed in the non-display region N of the TFT substrate 1 . The material of the first alignment layer 16 is the same as the material of the protrusions 161 and the protrusions 162 and the protrusions 161 and protrusions 162 are the same as the material of the protrusions 161 and the protrusions 162. In the embodiment of the present invention, Layer < / RTI > Here, the first alignment layer 16 and the protrusions 161 may be formed simultaneously using a transfer plate or a photomask having a pattern corresponding to the first alignment layer 16 and the protrusions 161; The protrusions 161 and the protrusions 162 using a transfer plate or a photomask having a pattern corresponding to the first alignment layer 16, the protrusions 161 and the protrusions 162. The first alignment layer 16, ) Can be formed at the same time. However, in other embodiments, the protrusions 162 may not be formed using a transfer plate or photomask having a pattern corresponding to the protrusions 162, and the particles generated during the polymerization of the alignment layer material (Including nuclei, crystals, granules or agglomerates).

Figs. 7A-7D are cross-sectional views along the line B-B 'in Fig. 6, showing the first alignment layer in the non-display area N. Fig. 7A, the ratio of the height H1 of the protrusion 161 to the thickness T of the first alignment layer 16 adjacent to the protrusion 161 (i.e., the ratio of the height H1 of the first alignment layer 16 to the thickness of the first alignment layer 16) The distance between the upper surface of the protrusion 161 and the surface 163 of the substrate 163 is in the range of 2 to 10. Here, the height H1 may range from 150 nm to 300 nm, and the thickness T may range from 10 nm to 100 nm. However, the present invention is not limited thereto, as long as the protrusions 161 have a certain height with respect to the first alignment layer 16 so that the pressure applied by the periphery of the alignment layer to the substrate and the adhesion between the alignment layer and the substrate are increased. But is not limited to one range. Additionally, the arrangement can also solve the problem of shrinkage of the orientation layer during overflow and curing processes of the material for producing orientation layer, and thus the variation of the orientation layer can be suppressed. A plurality of protrusions 162 may be further disposed beside the protrusions 161 of the first alignment layer 16 and the height H2 may be in a range of 5 nm to 30 nm. However, the present invention is not limited thereto. In addition, the projection 161 shown in Fig. 7A has a side surface perpendicular to the surface 163 of the first alignment layer 16. In another embodiment, both sides of the projection 161 can be inclined (as shown in Figure 7B); The projection 16 may have an arc shape (as shown in Fig. 7C); Or one side of the protrusion 161 is perpendicular to the surface 163 of the first alignment layer 16 and the other side thereof is a slope (as shown in FIG. 7D). However, the present invention is not limited thereto. In addition, while all the protrusions shown in Figs. 7A-7D have a flat surface, the protrusions 161 may have a structure similar to a non-planar surface or a ridge in some embodiments.

8A-8C are cross-sectional views along the line C-C 'in Fig. 6, showing the first alignment layer in the non-display area N. Fig. In general, a circuit is formed in the non-display area N of the liquid crystal display panel, and the first alignment layer 16 can also be arranged on the circuit 6. [

The relative position between the projection 161 of the first alignment layer 16 and the sealant 5 after the liquid crystal display panel of the embodiment of the present invention is sealed by the sealant 5 is shown in Fig. . The encapsulant 5 covers the protrusions 161 and increases the contact area between the encapsulant 5 and the first alignment layer 16 so that the encapsulant 5 and the first alignment layer 16, Can be prevented. Further, as shown in Fig. 9A, the edge of the first substrate 11 protrudes from the sealant 5. Fig.

However, in another embodiment of the present invention, the edge of the substrate 11 is substantially aligned with the edge of the sealant 5 as shown in Fig. 9B. Further, in another embodiment of the present invention, the material for preparing the orientation layer is a low viscosity PI. Therefore, although the protrusion 161 shown in FIG. 9A can not be formed, the periphery of the first orientation layer 16 is formed in a curved structure like the wave structure shown in FIG.

A first orientation layer having protrusions 161 and protrusions 162 formed thereon and a first orientation layer 162 having protrusions 162 formed thereon and having a wave structure as shown in Figure 11, A plurality of particles 164 may be formed in the first alignment layer 16. These particles 164 may be nuclei, crystals, granules or aggregates produced during the curing process as shown in FIG. In particular, the size of the particles 164 in the non-display area N is greater than the size of the particles 164 in the display area D. Further, in another embodiment, the particles 164 are present only in the non-display area N and not in the display area D; Or no particles are formed on the first alignment layer 16.

It should be noted that only the first alignment layer 16 is illustrated on FIG. 6 to FIG. 10 on the first substrate 11. However, it will be understood by those skilled in the art that other units (such as TFT units) between the first substrate 11 and the first alignment layer 16 are not shown here.

In addition, the liquid crystal display panel of the above-described embodiment can also be applied to the liquid crystal display device 7 as shown in Fig. Here, the liquid crystal display device 7 includes a backlight module; And the above-described liquid crystal display panel (not shown in the figure) disposed on the backlight module. Here, only the liquid crystal display device is exemplified, and other display devices such as a mobile phone, a notebook, a camera, a video camera, a music player, a navigation system, or a television may also have a liquid crystal display panel of the above-described embodiment.

While the invention has been described in conjunction with the preferred embodiments, it should be understood that many other variations and modifications are possible without departing from the spirit and scope of the invention as hereinafter claimed.

1: Thin Film Transistor (TFT) Substrate 2: Color Filter (CF) Substrate
3: a plurality of spacers 4: liquid crystal layer 5:

Claims (14)

A first substrate on which a pixel electrode, a data line, and a scan line are formed;
A second substrate facing the first substrate;
A first alignment layer disposed on the first substrate, the pixel electrode, the data line, and the scan line; And
And a liquid crystal layer disposed between the first substrate and the second substrate,
Wherein the first alignment layer disposed on the pixel electrode has a first thickness and a first alignment layer disposed on at least one of the scan line and the data line has a second thickness, The liquid crystal display panel. The display of claim 1, wherein the first substrate comprises a display area and a non-display area, wherein at least one projection, at least one projection or a combination thereof is disposed on a first orientation layer of the non- Liquid crystal display panel. The liquid crystal display panel according to claim 2, wherein the material of the first alignment layer is the same as the material of the protrusion or protrusion. 3. The liquid crystal display panel according to claim 2, wherein the protrusions or protrusions are integrated with the first alignment layer. The liquid crystal display panel according to claim 2, wherein the ratio of the height of the projection to the thickness of the first alignment layer adjacent to the projection is in the range of 2 to 10. The liquid crystal display panel according to claim 1, further comprising a sealant disposed between the first substrate and the second substrate and covering a part of the first alignment layer. 3. The liquid crystal display panel according to claim 2, further comprising a sealant disposed between the first substrate and the second substrate to cover the protrusions, protrusions, or a combination thereof. The liquid crystal display panel according to claim 1, wherein a ratio of the first thickness to the second thickness ranges from 1 to 10. < Desc / Clms Page number 19 > 2. The device of claim 1, further comprising at least one spacer disposed between the first substrate and the second substrate, wherein the first orientation layer on the spacer has a first thickness and a third thickness smaller than the second thickness, Wherein the liquid crystal display panel has a thickness. The liquid crystal display according to claim 1, further comprising a color filter unit, a black matrix and a second alignment layer, wherein the color filter unit and the black matrix are disposed on the second substrate, Wherein the second alignment layer on the color filter unit has a fourth thickness, the second alignment layer on the black matrix has a fifth thickness, and the fourth thickness is less than the fifth thickness Thinner, Liquid Crystal Display Panel. 11. The device of claim 10, further comprising: at least one spacer disposed between the first substrate and the second substrate, wherein the second alignment layer on the spacer has a third thickness, 4 < / RTI > thick and the fifth thickness. The liquid crystal display according to claim 1, further comprising a color filter unit, a black matrix, a second alignment layer, and at least one spacer disposed between the first substrate and the second substrate, 1 < / RTI > thickness and a third thickness that is thinner than the second thickness. The thin film transistor unit according to claim 1, further comprising a thin film transistor unit disposed on the first substrate,
A gate electrode, an insulating layer, a semiconductor layer, a source electrode, and a drain electrode,
Wherein the insulating layer covers the gate electrode, the semiconductor layer is disposed on the insulating layer, the source electrode and the drain electrode are disposed on the semiconductor layer and are separated by a predetermined distance to form a channel region,
Wherein the first alignment layer is disposed on the thin film transistor unit, and has a sixth thickness on the source and drain electrodes and a seventh thickness in the channel region, the sixth thickness being thinner than the seventh thickness, Liquid crystal display panel. The organic light emitting diode display according to claim 13, further comprising a protective layer covering the data line, the scan line and the thin film transistor unit, wherein the protective layer has an opening for exposing the drain electrode, Wherein the first alignment layer in the hole has an eighth thickness and the sixth thickness of the first alignment layer on the drain electrode is greater than an eighth thickness of the first alignment layer on the drain electrode Thin, liquid crystal display panel.

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