TWI424232B - Liquid crystal display panel, display subsrtrate structure of liquid crystal display and method of coating seal - Google Patents

Description

Liquid crystal display panel and display substrate structure thereof and frame glue coating method

The present invention relates to a display panel and its component structure, and more particularly to a liquid crystal display panel and its component structure.

In the process of a Thin Film Transistor Liquid Crystal Display (TFT-LCD), the Seal Coating Process usually bonds the active device array substrate and the color filter array substrate. And supply a common potential. Generally, the sealant is applied in a range around the color filter array substrate, that is, within a frame distance outside the display area.

FIG. 1A is a schematic diagram of a liquid crystal display panel of a conventional mobile phone. Referring to FIG. 1A , the liquid crystal display panel 100 includes a display area P1 , a non-display area P2 and a sealant 102 . Below the liquid crystal display panel 100 is a terminal region 110. The terminal region 110 includes a plurality of drive wafers 112 and a plurality of connection terminals 114. In addition, the distance d from the display area P1 of the liquid crystal display panel 100 to the edge of the liquid crystal display panel 100 is referred to as a Dead Space, and the sealant 102 is coated within the range of the frame distance.

On the other hand, in the general One Drop Filling (ODF) process, since the frame glue is hardened by using ultraviolet light, the metal pattern in the sealant-coated region is lined. The width of the line must have a specific distance to achieve a fixed ratio of light transmission.

1B is a partial schematic view showing a corner on one of the substrates of the liquid crystal display panel of FIG. 1A. Referring to FIG. 1B, the area where the sealant 102 is applied is a The metal pattern 122 of the lattice design has a fixed ratio of the line width and the light transmittance ratio of the metal pattern 122. When the sealant 102 is applied, the coating accuracy at the corners and the enthalpy rule need to be considered, that is, the control of the R angle, wherein the R angle refers to the radius at the corner.

However, when the conventional metal pattern is conventionally used for the sealant coating, it is not easy to determine the state of the sealant coating at the corner, and therefore other detection methods are additionally required for the determination. In other words, in the process practice, it is very inconvenient and inaccurate to use the conventional metal pattern to judge the coating of the corner rubber at the corner.

The invention provides a liquid crystal display panel, which can directly determine whether the position of the sealant coating is appropriate when the sealant is coated.

The invention further provides a display substrate structure, wherein the structure can directly determine whether the position of the sealant coating is appropriate during the coating of the sealant, thereby improving the efficiency and yield of the process practice.

The invention further provides a sealant coating method suitable for use in the above liquid crystal display panel or display substrate structure.

The present invention provides a liquid crystal display panel having a display area and a non-display area located around the display area. The liquid crystal display panel comprises a first substrate, a second substrate, a sealant and a liquid crystal layer. The non-display area of the first substrate has a sealant alignment pattern, wherein the sealant alignment pattern comprises a lattice pattern and at least one arc pattern. The lattice pattern is disposed in the non-display area, and the arc pattern is disposed at at least one corner of the non-display area. The second substrate is located opposite to the first substrate. The frame glue is correspondingly disposed on the first substrate and the second Between the substrates, and the sealant is located in the non-display area. In addition, the sealant covers the frame adhesive alignment pattern. The liquid crystal layer is located between the first substrate, the second substrate, and the sealant.

In an embodiment of the invention, one of the first substrate and the second substrate is an active device array substrate, and the other is a color filter array substrate.

The invention further provides a display substrate structure. The display substrate structure includes a substrate and a sealant. The substrate has a display area and a non-display area located around the display area. The frame adhesive alignment pattern includes a lattice pattern and at least one arc pattern. The grid pattern is disposed in the non-display area, and the arc pattern is disposed at at least one corner of the non-display area. The sealant is disposed in the non-display area of the substrate, and the sealant covers the alignment pattern of the sealant.

The invention further proposes a sealant coating method. First, a substrate having a display area and a non-display area around the display area is provided, wherein a non-display area of the substrate has a sealant alignment pattern. The sealant alignment pattern includes a lattice pattern and at least one arc pattern. The lattice pattern is disposed in the non-display area, and the arc pattern is disposed at at least one corner of the non-display area. Next, a sealant is applied in the non-display area to cover the sealant alignment pattern. Then, the position of the sealant is judged by the frame glue alignment pattern.

In an embodiment of the invention, the above-mentioned sealant alignment pattern includes a plurality of arc patterns. The arcuate patterns are arranged parallel to each other at the corners, and the sealant covers at least one of the arcuate patterns.

In an embodiment of the invention, each of the arc patterns has an R angle value, and the arc shape of the sealant at the corner can be determined by judging the arc pattern covered by the sealant.

In an embodiment of the invention, the arc pattern of the above-mentioned sealant alignment pattern is disposed at each corner of the non-display area.

In an embodiment of the invention, the arcuate patterns at different corners of the non-display area are the same.

In an embodiment of the invention, the arcuate patterns at different corners of the non-display area are not identical.

In an embodiment of the invention, the substrate is an active device array substrate or a color filter array substrate.

In summary, the sealant alignment pattern on the liquid crystal display panel of the present invention includes at least one curved pattern at the corner, so that when the sealant coating process is performed, it is directly determined whether the sealant at the corner is displayed or not. The area maintains an appropriate distance, thereby making the liquid crystal display panel have better process timeliness and yield.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

2A is a schematic plan view of a liquid crystal display panel of the present invention, and FIG. 2B is a schematic cross-sectional view of the liquid crystal display panel taken along line A-A' of FIG. 2A. Referring to FIG. 2A and FIG. 2B simultaneously, the liquid crystal display panel 200 has a display area P1 and a non-display area P2 located around the display area P1. The liquid crystal display panel 200 includes a first substrate 210, a second substrate 220, a sealant 230, and a liquid crystal layer 240. The second substrate 220 is located opposite to the first substrate 210. The frame glue 230 is correspondingly disposed on the first substrate 210 and the second substrate 220 between. The liquid crystal layer 240 is located between the first substrate 210, the second substrate 220, and the sealant 230.

2C is a partial enlarged view of the first substrate of the liquid crystal display panel illustrated in the area P of FIG. 2A. Referring to FIG. 2C, the non-display area P2 of the first substrate 210 has a sealant alignment pattern 250. The sealant alignment pattern 250 includes a lattice pattern 252 and at least one arc pattern 254. The lattice pattern 252 is disposed in the non-display area P2, and the arc pattern 254 is disposed at at least one corner 256 of the non-display area P2. In detail, the sealant alignment pattern 250 has a light shielding area P3 and a light transmitting area P4. When the bonding process of the first substrate 210 and the second substrate 220 is performed, the ultraviolet light may be irradiated to the sealant 230 covering the sealant alignment pattern 250 by the transparent region P4 to harden the sealant 230 to complete the liquid crystal. The bonding process of the display panel 200. In this embodiment, when the sealant 230 is applied to the sealant alignment pattern on the first substrate 210, in order to directly determine the state of the sealant coating at the corner, at least one arc pattern 254 is disposed. The corner of the non-display area P2 is as shown in FIG. 2C.

How the coating of the sealant 230 at the corner 256 is directly determined by the arc pattern 254 will be described in detail below. When the sealant 230 is applied, the different R angle values at the corner 256 affect the yield of the liquid crystal display panel during the bonding process. For example, when the R angle value of the corner 256 is smaller, the coating time of the sealant 230 has to be elongated, and the phenomenon that the sealant 230 is broken is liable to occur, thereby making the adhesion of the liquid crystal display panel 200 poor. When the R angle of the corner 256 is too large, although the above situation can be improved, the position of the sealant 230 at the corner 256 is too close to the display area P1, resulting in a sealant. 230 displays a display unit (not shown) in the display area P1. In other words, a proper R angle value can have a better bond process yield.

In order to explain the above in more detail, the following specific embodiments are described. 3A is a schematic view showing a corner angle of R angle=0.7 mm when the frame seal coating process is performed, and FIG. 3B is a schematic view showing a corner angle of R angle=1.4 mm when the frame seal coating process is performed. Please refer to FIG. 3A. In this embodiment, a=b=0.7mm, where a and b are both defined as the width of the sealant 230, and in addition, the R angle=0.7mm is used as the corner of the sealant 230. That is, c=0.7mm is used as the radius of 256 at the corner, and 1/4 arc is the arc of the frame glue 230 at the corner 256, as shown in the left diagram of FIG. 3A. After the sealant 230 is applied in the above manner, the pattern of the sealant 230 formed on the first substrate is as shown in the right diagram of FIG. 3A, wherein k is defined as the arc of the sealant 230 at the corner 256 to The distance of the display area P1.

Referring to FIG. 3B, if the widths a and b of the sealant 230 are 0.7 mm, and the R angle=1.4 mm is used as the corner of the sealant 230, that is, c=1.4 mm is used as the radius of the corner 256, and The 1/4 arc is used as the arc of the frame glue 230 at the corner 256, as shown in the left diagram of FIG. 3B. Similarly, when the sealant 230 is applied in the above manner, the pattern of the sealant 230 formed on the first substrate is as shown in the right diagram of FIG. 3B, wherein k is defined as the sealant 230 at the corner 256. The distance from the inner arc to the display area P1. In this way, by comparing FIG. 3A with FIG. 3B, it can be seen that the arc length of the frame glue 230 at the corner 256 with the R angle=1.4 mm is longer than the arc of the R angle=0.7 mm, that is, the R angle=1.4. The k value corresponding to mm is smaller than when the angle R is 0.7 mm. That is to say, the size of the R angle determines the arc of the sealant 230 at the corner 256 to the display area. The distance of P1. Further, when the value of the R angle is larger, the closer the corner seal 230 is to the display area P1 at the corner 256, that is, the more easily the sealant 230 contaminates the display unit in the display area P1. Conversely, when the value of the R angle is too small, the distance between the position of the sealant 230 at the corner 256 and the position of the display area P1 is too long, and the frame seal 230 is easily broken. Therefore, as can be seen from the above, the R angle value corresponds to the k value, and the appropriate value of k can prevent the frame glue 230 from contaminating the display area P1 or the frame glue 230 from being broken. In other words, the R angle size within the appropriate range has Better bonding process yield.

Referring to FIG. 2C again, in the embodiment, the corner 256 in the non-display area P2 of the liquid crystal display panel 200 has four arc patterns 254, that is, the arc pattern 254 of the sealant alignment pattern 250 is Each of the corners 254 is disposed at a corner 256 of the non-display area P2, wherein each of the arc patterns 254 has an R angle value, for example, an angle of R = 0.5, 1.0, 1.5, 2.0 mm, which is an example and is not intended to limit the present invention. . That is to say, the number of the arc patterns 254 is defined by the needs of the user and the display panel, and thus the present invention does not limit the number of the arc patterns 254. In addition, the different arc patterns 254 have different R angle values, and the arc patterns 254 are arranged parallel to each other at the corner 256, as illustrated in FIG. 2C. In the present embodiment, the arc patterns 254 at the different corners of the non-display area P2 are the same. Of course, depending on the different types of display panels or different needs of the user, in other embodiments, the arcuate patterns 254 at different corners of the non-display area P2 may not be identical.

It should be noted that, in this embodiment, only the arc pattern 254 is designed at the corner 256 as an example. This is an example and is not intended to limit the present invention, that is, In other embodiments, the same concept may also be to design the curved pattern 254 on the corners 256a, 256b, 256c. In particular, the arcuate pattern 254 described above may be designed at any one of the corners 256, 256a, 256b, 256c, any two, any three or four corners.

Please refer to FIG. 2C. In detail, when the sealant 230 is coated, the center line coated by the sealant 230 is aligned to the center line of the sealant alignment pattern 250, and various R angle values are designed. R = 0.51.0, 1.5, 2.0 mm as described above, as shown in Figure 2C. In this way, when the coating process is performed, the operator can directly view the sealant 230 by the arc pattern 254 of different R angle values directly at the corner 256 of the first substrate 210. The distance between the corners 256 and the display area P1 is determined, and it is further determined whether the k value is too small, causing the sealant 230 to contaminate the display area P1 or the k value is too large to cause the sealant 230 to break. Therefore, the present invention can be used to directly know whether the coated sealant 230 has an appropriate distance from the display area by arranging at least one arc pattern 254 at the corner 256 of the coating path of the sealant 230, thereby saving the use of conventional knowledge. When it comes to technology, the judgment time is spent. It is worth mentioning that, when the frame glue alignment pattern 250 of the present invention is applied to a narrow-framed liquid crystal display panel (not shown), since the frame distance of the narrow-framed liquid crystal display panel is narrower than that of a general liquid crystal display panel, When the sealant 230 is applied, it is necessary to pay special attention to the position where the sealant 230 is applied. When the coating seal 230 is deviated, the sealant will contaminate the display area or peripheral circuit components, thereby forming a defective product. In other words, the use of the sealant alignment pattern 250 of the present invention avoids the occurrence of the above.

In this embodiment, FIG. 4 is a sealant of the liquid crystal display panel of the present invention. Flow chart of the coating method. The method of coating the frame seal 230 is as follows. In order to clearly understand the relationship of the components, please refer to FIG. 4, and also refer to FIGS. 2A to 2C. First, in step S1, a substrate is provided, as shown in FIG. 2A to FIG. 2C, wherein the substrate is, for example, the first substrate 210 described above, and therefore, the same reference numerals are used. In other words, the substrate 210 has a display area P1 and a non-display area P2 located around the display area P1. The mask adhesive alignment pattern 250 is included in the non-display area P2 of the substrate 210, and the sealant alignment pattern 250 includes a grid pattern 252 and at least one arc pattern 254. The lattice pattern 252 is disposed in the display area P1, and the arc pattern 254 is disposed at at least one corner 256 of the non-display area P2.

Next, in step S2, a sealant 230 is applied to the non-display area P2 of the substrate 210 to cover the sealant alignment pattern 250, as shown in FIGS. 2A-2C. In the present embodiment, the method of applying the sealant 230 is, for example, a process using a drop-type injection method, but is not limited thereto.

Then, in step S3, the position of the sealant 230 is determined by the sealant alignment pattern 250, as shown in FIGS. 2A-2C. Further, by observing the position of the sealant 230 at the arc pattern 254, it can be directly determined whether the distance of the sealant 250 from the display area P1 at the corner 256 is appropriate.

It is to be noted that, in this embodiment, the display substrate structure 260 of the liquid crystal display panel 200 of the present invention includes a substrate and a sealant 230, wherein the substrate may be the first substrate 210. The sealant 230 is disposed in the non-display area P2 of the substrate, and the sealant 230 covers the sealant alignment pattern 250 on the substrate 210'.

What is more worth mentioning is that the first substrate 210 and the second substrate 220 are as described above. One of them is an active device array substrate, and the other is a color filter array substrate. In other words, the substrate may also be an active device array substrate or a color filter array substrate. For example, the first substrate 210 is, for example, an active device array substrate, and an active layer (not shown) is formed on the first substrate 210. The active layer has a plurality of scan lines (not shown) and a plurality of data lines. (not shown), a plurality of thin film transistors (not shown) and a plurality of pixel electrodes (not shown), wherein the scan lines are alternately arranged with the data lines, and the thin film transistors are electrically connected to the corresponding scan lines and data lines. And the pixel electrode is electrically connected to the corresponding thin film transistor. The second substrate 220 is, for example, a color filter array substrate, and a color filter film (not drawn) is formed on the second substrate 220, and includes a display area (not shown) of the plurality of color filter units, and a Non-display area of the black matrix (not shown). The above is only an example and is not intended to limit the invention.

In summary, the liquid crystal display panel of the present invention has at least the following advantages. Firstly, the alignment pattern of the sealant is arranged so that the ultraviolet light can pass through the transparent region of the alignment pattern of the sealant to harden the sealant, thereby completing the adhesion process between the substrates. Furthermore, the sealant alignment pattern has at least one arc-shaped pattern at the corners, so that when the sealant is applied to the corners, the definition of the arc-shaped pattern can directly know the coating of the corners at the corners, and further The liquid crystal display panel has better process aging and yield. In addition, when the sealant alignment pattern of the present invention is applied to a narrow-framed liquid crystal display panel, the yield and timeliness of the original process can be improved.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. Protection The scope is subject to the definition of the scope of the patent application attached.

100,200‧‧‧LCD panel

102, 240‧‧‧ box glue

110‧‧‧Terminal area

112‧‧‧Drive chip

114‧‧‧Connecting terminal

122‧‧‧Metal pattern

210‧‧‧First substrate

210'‧‧‧Substrate

220‧‧‧second substrate

230‧‧‧Box glue

240‧‧‧Liquid layer

250‧‧‧Frame glue alignment pattern

252‧‧‧ lattice pattern

254‧‧‧Arc pattern

256, 256a, 256b, 256c‧‧ corner

260‧‧‧Display substrate structure

a, b‧‧‧ frame width

C‧‧‧radius

D‧‧‧Border distance

K‧‧‧distance

P‧‧‧ area

P1‧‧‧ display area

P2‧‧‧ non-display area

P3‧‧‧ shading area

P4‧‧‧Light transmission area

S1, S2, S3‧‧‧ steps

FIG. 1A is a schematic diagram of a liquid crystal display panel of a conventional mobile phone.

1B is a partial schematic view showing a corner on one of the substrates of the liquid crystal display panel of FIG. 1A.

2A is a top plan view of a liquid crystal display panel of the present invention.

Fig. 2B is a schematic cross-sectional view of the liquid crystal display panel taken along line A-A' of Fig. 2A.

2C is a partial enlarged view of the first substrate of the liquid crystal display panel illustrated in the area P of FIG. 2A.

FIG. 3A is a schematic view showing a corner angle of R angle=0.7 mm at the time of performing the sealant coating process.

FIG. 3B is a schematic view showing a corner angle of R angle=1.4 mm when the frame coating process is performed.

4 is a flow chart of a method for coating a sealant of a liquid crystal display panel of the present invention.

210‧‧‧First substrate

250‧‧‧Frame glue alignment pattern

252‧‧‧ lattice pattern

254‧‧‧Arc pattern

256‧‧‧ corner

P1‧‧‧ display area

P2‧‧‧ non-display area

P3‧‧‧ shading area

P4‧‧‧Light transmission area

Claims (21)

A liquid crystal display panel having a display area and a non-display area around the display area, comprising: a first substrate, the non-display area of the first substrate has a sealant alignment pattern, wherein the sealant The alignment pattern has a light-shielding region and a light-transmissive region, and the sealant alignment pattern includes a lattice pattern and at least one arc-shaped pattern. The lattice pattern is disposed in the non-display area, and the arc pattern is disposed on the non-display area. At least one corner of the area; a second substrate located opposite the first substrate; a frame glue correspondingly disposed between the first substrate and the second substrate and located in the non-display area, the frame glue covers The sealant is in a positional pattern, and the boundary of the sealant on the first substrate does not exceed a boundary of the sealant alignment pattern on the first substrate; and a liquid crystal layer is located on the first substrate and the second Between the substrate and the sealant. The liquid crystal display panel of claim 1, wherein the sealant alignment pattern comprises a plurality of arc patterns, and the arc patterns are arranged parallel to each other at the corners. The liquid crystal display panel of claim 2, wherein each of the arc patterns has an R angle value. The liquid crystal display panel of claim 1, wherein the arc patterns of the sealant alignment pattern are disposed at respective corners of the non-display area. The liquid crystal display panel of claim 4, wherein The arc patterns at different corners of the non-display area are the same. The liquid crystal display panel of claim 4, wherein the arc patterns at different corners of the non-display area are not identical. The liquid crystal display panel of claim 1, wherein one of the first substrate and the second substrate is an active device array substrate, and the other is a color filter array substrate. A display substrate structure includes: a substrate having a display area and a non-display area around the display area, wherein the non-display area of the substrate has a sealant alignment pattern, and the sealant is aligned The pattern has a light-shielding area and a light-transmissive area, and the sealant alignment pattern includes a grid pattern and at least one arc-shaped pattern, the grid pattern is disposed in the non-display area, and the arc pattern is disposed in the non-display area At least one corner; and a frame glue corresponding to the non-display area of the substrate, The sealant covers the sealant alignment pattern, and the boundary of the sealant on the substrate does not exceed the boundary of the sealant alignment pattern on the substrate. The display substrate structure of claim 8, wherein the sealant alignment pattern comprises a plurality of arc patterns, and the arc patterns are arranged parallel to each other at the corners. The display substrate structure of claim 9, wherein each of the arc patterns has an R angle value. The display substrate structure of claim 8, wherein the arc patterns of the sealant alignment pattern are disposed at respective corners of the non-display area. The display substrate structure of claim 11, wherein the arc patterns at different corners of the non-display area are the same. The display substrate structure of claim 11, wherein the arc patterns at different corners of the non-display area are not identical. The display substrate structure of claim 8, wherein the substrate is an active device array substrate or a color filter array substrate. A masking coating method includes: providing a substrate having a display area and a non-display area around the display area, wherein the non-display area of the substrate has a sealant alignment pattern, the frame The glue alignment pattern has a light shielding area and a light transmission area, and the sealant alignment pattern includes a grid pattern and at least one arc pattern, wherein the grid pattern is disposed in the non-display area, and the arc pattern is disposed on the non-display area At least one corner of the display area; coating a sealant in the non-display area to cover the sealant alignment pattern, wherein a boundary of the sealant on the substrate does not exceed the sealant alignment pattern on the substrate The boundary of the sealant; and the position of the sealant by the sealant alignment pattern. The sealant coating method of claim 15, wherein the sealant alignment pattern comprises a plurality of arc patterns, the arc patterns are arranged parallel to each other at the corner, and the sealant is covered At least one of the arcuate patterns. The method for coating a frame according to claim 16, wherein each of the arc-shaped patterns has an R-angle value, and the arc-shaped pattern covered by the sealant is judged to be at the corner. The curvature. The frame coating method of claim 15, wherein the arc patterns of the sealant alignment pattern are disposed at respective corners of the non-display area. The sealant coating method of claim 18, wherein the arc patterns at different corners of the non-display area are the same. The sealant coating method of claim 18, wherein the arc patterns at different corners of the non-display area are not identical. The method for coating a sealant according to claim 15, wherein the substrate is an active device array substrate or a color filter array substrate.