TWI396900B - Multi-domain vertically aligned liquid crystal display and method for fabcricating color filter substrate - Google Patents

Description

Multi-domain vertical alignment liquid crystal display panel and method for manufacturing color filter substrate

The present invention relates to a Multi-domain Vertically Aligned (MVA) liquid crystal display panel, and more particularly to a multi-domain vertical alignment liquid crystal display panel having a barricade.

Due to its high image quality, good space utilization efficiency, low power consumption, and no radiation, liquid crystal displays have gradually become the mainstream of the market. In order to make the liquid crystal display have better display quality, various liquid crystal displays with wide viewing angles have been developed on the market, such as in-plane switching (IPS) liquid crystal display and fringe field switching liquid crystal. Display and multi-domain vertically aligned (MVA) liquid crystal displays.

In order to mass-produce a liquid crystal display, the size of the glass substrate for manufacturing the liquid crystal display panel before cutting is usually several times that of the liquid crystal display panel. Generally, the fabrication of a liquid crystal display includes the steps of fabricating a thin film transistor array substrate, fabricating a color filter substrate, bonding two substrates, masking coating, liquid crystal injection, dicing, splitting, driving wafer bonding, backlight assembly, and the like.

After cutting and splitting, the liquid crystal display panel is initially completed. However, during or after the cutting and cleavage, particles from the outside are highly likely to cause peripheral lines on the thin film transistor array substrate and the color filter substrate. The common electrode is short-circuited, causing the display of the liquid crystal display panel to be abnormal. Therefore, how to reduce the above-mentioned unfavorable factors is one of the problems to be overcome in the current multi-domain vertical alignment type liquid crystal display.

The present invention provides a multi-domain vertical alignment liquid crystal display panel having a barrier wall in a non-display area around the substrate.

The invention provides a multi-domain vertical alignment liquid crystal display panel comprising an active device array substrate, a color filter substrate, a sealant and a liquid crystal layer. The color filter substrate is disposed above the active device array substrate, wherein the color filter substrate comprises a substrate, a plurality of color filter films, a common electrode, a plurality of alignment protrusions, a plurality of spacers, and at least one retaining wall. The substrate has an outer surface and an inner surface facing the active device array substrate. The color filter film is disposed on the inner surface. The common electrode is disposed on the color filter film. The alignment protrusions are disposed on the common electrode. The spacer is disposed on the common electrode. The retaining wall is disposed on the common electrode, wherein a sidewall of the retaining wall is substantially aligned with one of the sidewalls of the substrate. The sealant is disposed between the active device array substrate and the color filter substrate. The liquid crystal layer is disposed in the sealant and is disposed between the active device array substrate and the color filter substrate.

In an embodiment of the invention, the substrate is smaller than the active device array substrate, and the retaining wall is located above the active device array substrate, and the retaining wall maintains a distance from the active device array substrate.

In an embodiment of the present invention, the retaining wall includes a first retaining wall and a second retaining wall, wherein the first sidewall of the first retaining wall is substantially aligned with a sidewall of one of the long sides of the substrate; and the second The second side wall of the retaining wall is substantially aligned with the side wall of one of the short sides of the substrate.

In an embodiment of the invention, the first retaining wall is coupled to the second retaining wall.

In an embodiment of the invention, the first retaining wall is separated from the second retaining wall.

In an embodiment of the invention, the material of the retaining wall is the same as the material of the alignment protrusion.

In an embodiment of the invention, the material of the retaining wall is the same as the material of the spacer.

In an embodiment of the invention, the retaining wall includes a first portion and a second portion stacked on each other, wherein the material of the first portion is the same as the material of the alignment protrusion, and the material of the second portion is the same as the material of the spacer. .

In an embodiment of the invention, the first portion is stacked on the second portion.

In an embodiment of the invention, the second portion is stacked on the first portion.

The present invention provides a method of manufacturing a color filter substrate in which a retaining wall is formed together with an alignment protrusion.

The present invention provides a method of manufacturing a color filter substrate in which a retaining wall is formed together with a spacer.

The present invention provides a method of manufacturing a color filter substrate in which a retaining wall, an alignment protrusion, and a spacer are collectively formed.

In an embodiment of the present invention, the active device array substrate has a pixel array and a peripheral line electrically connected to the pixel array, and the peripheral line and a portion of the common electrode are located outside the sealant, and the peripheral lines are not Common electrode contact.

The present invention provides a method of manufacturing a color filter substrate comprising the following steps. First, a plurality of color filter films are formed on a substrate. Next, a common electrode is formed on the color filter film. Thereafter, a plurality of alignment protrusions, a plurality of spacers, and at least one retaining wall are formed on the common electrode, wherein the retaining wall is formed together with the alignment protrusions.

In an embodiment of the invention, the method for fabricating the color filter substrate further includes forming an alignment film on the common electrode, the alignment protrusion, and the spacer.

The present invention further provides a method of fabricating a color filter substrate comprising the following steps. First, a plurality of color filter films are formed on a substrate. Next, a common electrode is formed on the color filter film. Thereafter, a plurality of alignment protrusions, a plurality of spacers, and at least one retaining wall are formed on the common electrode, wherein the retaining wall is formed together with the spacer.

In an embodiment of the invention, the method for fabricating the color filter substrate further includes forming an alignment film on the common electrode, the alignment protrusion, and the spacer.

The present invention further provides a method of fabricating a color filter substrate comprising the following steps. First, a plurality of color filter films are formed on a substrate. Next, a common electrode is formed on the color filter film. Thereafter, a plurality of alignment protrusions, a plurality of spacers, and at least one retaining wall are formed on the common electrode, wherein the retaining wall is formed together with the alignment protrusions and the spacers.

In an embodiment of the invention, the method for fabricating the color filter substrate further includes forming an alignment film on the common electrode, the alignment protrusion, and the spacer.

Based on the above, the multi-domain vertical alignment liquid crystal display panel of the present invention has a retaining wall located in the non-display area, which can effectively improve the situation in which the display panel is short-circuited due to foreign matter falling in the back-end manufacturing process.

The above described features and advantages of the present invention will be more apparent from the following description.

[First Embodiment]

1A is a side view showing a multi-domain vertical alignment liquid crystal display panel according to a first embodiment of the present invention. Referring to FIG. 1A , the multi-domain vertical alignment liquid crystal display panel 100 of the embodiment includes an active device array substrate 110 , a color filter substrate 120 , a sealant 130 , and a liquid crystal layer 140 . The color filter substrate 120 is disposed above the active device array substrate 110 , and the sealant 130 is disposed between the active device array substrate 110 and the color filter substrate 120 . In addition, the liquid crystal layer 140 is disposed in the sealant 130 and located between the active device array substrate 110 and the color filter substrate 120.

1B is a schematic perspective view of a multi-domain vertical alignment liquid crystal display panel of the first embodiment. Referring to FIG. 1B , the active device array substrate 110 of the present embodiment has a pixel array 112 and a peripheral line 114 electrically connected to the pixel array 112 . For example, the active device array substrate 110 of the present embodiment is a thin film transistor array substrate, and the pixel array 112 thereon is composed of a plurality of scanning lines, a plurality of data lines, and a plurality of pixel units. This embodiment does not limit the form of the pixel unit, and the pixel unit may be a transmissive pixel unit, a reflective pixel unit, or a transflective pixel unit.

Fig. 1C is an enlarged schematic view of a portion A in Fig. 1A. Referring to FIG. 1C , in the embodiment, the color filter substrate 120 includes a substrate 121 , a plurality of color filter films 122 , a common electrode 123 , a plurality of alignment protrusions 124 , a plurality of spacers 125 , and at least one retaining wall 126 . In addition, the color filter substrate 120 further includes an alignment film 127 formed on the common electrode 123, the alignment protrusion 124, and the spacer 125, as shown in FIG. 1C. Obviously, since the retaining wall 126 is disposed on the common electrode 123, when the foreign matter falls between the common electrode 123 and the peripheral line 114, the foreign matter does not directly contact the common electrode 123 because of the barrier function of the barrier 126. The peripheral line 114 can effectively reduce the probability of abnormal conduction between the common electrode 123 and the peripheral line 114, so that the product yield is improved to some extent.

The substrate 121 has an outer surface 121b and an inner surface 121a facing the active device array substrate 110, and the color filter film 122 is disposed on the inner surface 121a of the substrate 121. For example, the color filter film 122 may include 122a, 122b, and 122c, which represent a red filter film, a green filter film, a blue filter film, a white filter film, or a filter film of other colors. In addition, the color filter substrate 120 of the embodiment further includes a plurality of black matrices 122d disposed between the color filter films 122.

The common electrode 123 is disposed on the color filter film 122, and the alignment protrusion 124, the spacer 125, and the retaining wall 126 are disposed on the common electrode 123. One sidewall 126s of the barrier 126 and one sidewall 121s of the substrate 121 are substantially Cut together. In this embodiment, the material of the retaining wall 126 is the same as the material of the alignment protrusion 124. In other possible embodiments, the material of the retaining wall 126 may be the same as the material of the spacer 125. In actual production, the retaining wall 126 can be made together with the alignment protrusion 124. Of course, the retaining wall 126 can also be formed together with the spacer 125. Therefore, the manufacturing of the retaining wall 126 does not cause process complexity and existing processes. Compatible.

It is worth mentioning that in the present embodiment, the peripheral line 114 and a partial area of the common electrode 123 are located outside the sealant 130, and the peripheral line 114 is not in contact with the common electrode 123. As shown in FIG. 1A and FIG. 1C, the size of the substrate 121 is smaller than the size of the active device array substrate 110, that is, a portion of the peripheral line 114 protrudes from the projection of the substrate 121 on the active device array substrate 110, and the retaining wall 126 is located on the active device array substrate. Above 110, and maintaining a spacing G with the active device array substrate 110.

[Second embodiment]

2A-2B are enlarged side views, respectively, of a multi-domain vertical alignment liquid crystal display panel according to a second embodiment of the present invention. Referring to FIG. 2A, the retaining wall 226 in this embodiment is similar to the retaining wall 126 in the first embodiment, but the main difference is that the retaining wall 226 in this embodiment includes the first portion stacked on each other. The portion 226a and the second portion 226b, wherein the material of the first portion 226a is the same as the material of the alignment protrusion 124, and the material of the second portion 226b is the same as the material of the spacer 125.

In the present embodiment, the second portion 226b is stacked on the first portion 226a. In other possible embodiments, the first portion 226a may also be stacked on the second portion 226b as shown in FIG. 2B.

[Third embodiment]

3A is a schematic view of the color filter substrate of FIG. 1A. FIG. 3B is a schematic view of the color filter substrate of FIG. 3A before cutting. Referring to FIG. 3A, the retaining wall 326 in this embodiment is similar to the retaining wall 126 in the first embodiment, but the main difference between the two is that the retaining wall 326 in this embodiment includes a first retaining wall 326a and The second retaining wall 326b, wherein the first sidewall 326as of the first retaining wall 326a is substantially aligned with the sidewall 121cs of one of the long sides 121c of the substrate 121, and the second sidewall 326bs of the second retaining wall 326b is opposite to the substrate 121 The side walls 121ds of a short side 121d are substantially aligned.

In the present embodiment, the first retaining wall 326a and the second retaining wall 326b are separated, and in other possible embodiments, the first retaining wall 326a and the second retaining wall 326b may also be connected to each other.

It is worth mentioning that the retaining wall 326 in this embodiment is formed in the retaining wall region 390 around the cutting line 380, as shown in FIG. 3B. When the substrate 121 is cut along the cutting line 380, the partial retaining walls 326 located at the outer edge of the cutting line 380 are collectively cut off to obtain the color filter substrate 120 shown in FIG. 3A.

Fourth Embodiment

4A to 4D are schematic views showing a manufacturing process of a color filter substrate according to an embodiment of the present invention. Referring to FIG. 4A, first, a plurality of color filter films 122 are formed on the substrate 121. In detail, the step of forming the color filter film 122 in this embodiment includes forming a plurality of black matrices 122d on the substrate 121. Thereafter, a color filter film 122 such as a red filter film 122a, a green filter film 122b, and a blue filter film 122c is disposed between the black matrix 122d.

Next, a common electrode 123 is formed on the color filter film 122 and the substrate 121 as shown in FIG. 4B. The material of the common electrode 123 is, for example, a transparent and conductive metal oxide such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). It should be noted that before forming the common electrode 123, the present embodiment can selectively form a flat layer (not shown) covering the color filter film 122 so that the common electrode 123 can be formed on a relatively flat surface.

Thereafter, a plurality of alignment protrusions 124 and at least one retaining wall 126 are formed on the common electrode 123. In the present embodiment, the retaining wall 126 and the alignment protrusions 124 are formed together, as shown in FIG. 4C. When a driving voltage is applied between the assembled active device array substrate 110 and the color filter substrate 120, the alignment protrusions 124 can cause liquid crystal molecules in the liquid crystal layer 130 to be tilted in different directions to form a plurality of regions. In this way, a wide viewing angle (MVA) display effect can be achieved.

It is worth mentioning that in other possible embodiments, the retaining wall 126 may be formed together with the spacer 125. In addition, the retaining wall 126 can be fabricated together during the fabrication of the alignment protrusions 124 and the spacers 125.

After the alignment protrusion 124 and the spacer 125 are completed, the present embodiment can form the alignment film 127 on the common electrode 123, the alignment protrusion 124, and the spacer 125 as shown in FIG. 4D.

In summary, the multi-domain vertical alignment liquid crystal display panel of the present invention has a retaining wall that is aligned with the edge of the substrate, and can effectively improve short-circuit defects caused by foreign matter falling in the rear-end process of the display. In addition, the present invention can also reduce the problem that the peripheral line of the liquid crystal display panel is crushed or scratched due to the scribing process.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Multi-domain vertical alignment liquid crystal display panel

110. . . Active device array substrate

120. . . Color filter substrate

121. . . Substrate

121a. . . The inner surface

121b. . . The outer surface

121c. . . The long side

121d. . . Short side

121s, 121cs, 121ds. . . Side wall

122. . . Color filter film

122a. . . Red filter film

122b. . . Green filter film

122c. . . Blue filter film

122d. . . Black matrix

123. . . Common electrode

124. . . Alignment protrusion

125. . . Interstitial

126, 226, 326. . . Retaining wall

126s, 226s. . . Side wall

127. . . Orientation film

130. . . Frame glue

140. . . Liquid crystal layer

226a. . . first part

226b. . . the second part

326a. . . First retaining wall

326b. . . Second retaining wall

326as. . . First side wall

326bs. . . Second side wall

380. . . Cutting line

390. . . Retaining wall area

G. . . spacing

1A is a side view showing a multi-domain vertical alignment liquid crystal display panel according to a first embodiment of the present invention.

1B is a schematic perspective view of a multi-domain vertical alignment liquid crystal display panel of the first embodiment.

Fig. 1C is an enlarged schematic view of a portion A in Fig. 1A.

2A-2B are enlarged side views, respectively, of a multi-domain vertical alignment liquid crystal display panel according to a second embodiment of the present invention.

3A is a schematic view of the color filter substrate of FIG. 1A.

FIG. 3B is a schematic view of the color filter substrate of FIG. 3A before cutting.

4A to 4D are schematic views showing a manufacturing process of a color filter substrate according to an embodiment of the present invention.

100. . . Multi-domain vertical alignment liquid crystal display panel

110. . . Active device array substrate

120. . . Color filter substrate

121. . . Substrate

121a. . . The inner surface

121b. . . The outer surface

121s. . . Side wall

122. . . Color filter film

122a. . . Red filter film

122b. . . Green filter film

122c. . . Blue filter film

122d. . . Black matrix

123. . . Common electrode

124. . . Alignment protrusion

125. . . Interstitial

126. . . Retaining wall

126s. . . Side wall

127. . . Orientation film

130. . . Frame glue

140. . . Liquid crystal layer

G. . . spacing

Claims (17)

A multi-domain vertical alignment liquid crystal display panel includes: an active device array substrate; a color filter substrate disposed above the active device array substrate, wherein the color filter substrate comprises: a substrate having an outer surface and an orientation An inner surface of the active device array substrate; a plurality of color filter films disposed on the inner surface; a common electrode disposed on the color filter films; and a plurality of alignment protrusions disposed on the common electrode; a spacer is disposed on the common electrode; at least one retaining wall is disposed on the common electrode, wherein a sidewall of the retaining wall is substantially aligned with one of the sidewalls of the substrate; a frame of glue is disposed on the active Between the device array substrate and the color filter substrate; and a liquid crystal layer disposed in the sealant and located between the active device array substrate and the color filter substrate. The multi-domain vertical alignment liquid crystal display panel of claim 1, wherein the substrate is smaller than the active device array substrate, and the retaining wall is located above the active device array substrate, and the retaining wall and the active device array substrate are maintained. a spacing. The multi-domain vertical alignment liquid crystal display panel of claim 1, wherein the retaining wall comprises: a first retaining wall, a first sidewall of the first retaining wall and a side wall of one of the long sides of the substrate Substantially aligned; and a second retaining wall, a second sidewall of the second retaining wall being substantially aligned with a sidewall of one of the short sides of the substrate. The multi-domain vertical alignment liquid crystal display panel of claim 3, wherein the first retaining wall is connected to the second retaining wall. The multi-domain vertical alignment liquid crystal display panel of claim 3, wherein the first retaining wall is separated from the second retaining wall. The multi-domain vertical alignment liquid crystal display panel of claim 1, wherein the material of the retaining wall is the same as the material of the alignment protrusion. The multi-domain vertical alignment liquid crystal display panel according to claim 1, wherein the material of the retaining wall is the same as the material of the spacer. The multi-domain vertical alignment liquid crystal display panel of claim 1, wherein the retaining wall comprises a first portion and a second portion stacked on each other, wherein the material of the first portion is the same as the material of the alignment protrusion. The material of the second part is the same as the material of the spacer. The multi-domain vertical alignment liquid crystal display panel of claim 8, wherein the first portion is stacked on the second portion. The multi-domain vertical alignment liquid crystal display panel of claim 8, wherein the second portion is stacked on the first portion. The multi-domain vertical alignment liquid crystal display panel of claim 1, wherein the active device array substrate has a pixel array and a peripheral line electrically connected to the pixel array, and the peripheral line and the common line A portion of the electrode is located outside the sealant and the peripheral line is not in contact with the common electrode. A method for manufacturing a color filter substrate, comprising: forming a plurality of color filter films on a substrate; forming a common electrode on the color filter films; and forming a plurality of alignment protrusions on the common electrode a spacer and at least one retaining wall, wherein the retaining wall is formed together with the alignment protrusions. The method for manufacturing a color filter substrate according to claim 12, further comprising forming an alignment film on the common electrode, the alignment protrusions, and the spacers. A method for manufacturing a color filter substrate, comprising: forming a plurality of color filter films on a substrate; forming a common electrode on the color filter films; and forming a plurality of alignment protrusions on the common electrode a spacer and at least one retaining wall, wherein the retaining wall is formed together with the spacers. The method for manufacturing a color filter substrate according to claim 14, further comprising forming an alignment film on the common electrode, the alignment protrusions, and the spacers. A method for manufacturing a color filter substrate, comprising: forming a plurality of color filter films on a substrate; forming a common electrode on the color filter films; and forming a plurality of alignment protrusions on the common electrode a spacer and at least one retaining wall, wherein the retaining wall is formed together with the alignment protrusions and the spacers. The method for manufacturing a color filter substrate according to claim 16, further comprising forming an alignment film on the common electrode, the alignment protrusions, and the spacers.