TW201704827A - Liquid crystal display panel and method of fabricating the same - Google Patents

Abstract

Provided is a method of fabricating a liquid crystal display panel. An active device array substrate and an opposite substrate are provided, wherein the active device array substrate includes a first substrate and a first electrode layer, and the opposite substrate includes a second substrate and a second electrode layer. A first alignment film is formed on the first electrode layer and a second alignment film is formed on the second electrode layer. A sealant composition including an adhesive and conductive particles is applied on one of the first alignment film and the second alignment film. The active device array substrate and the opposite substrate are assembled, wherein the assembling step includes heating the sealant composition so as to merge a part of the conductive particles into a conductive material piercing through the first alignment film and the second alignment film, respectively.

Description

Liquid crystal display panel and method of manufacturing same

The present invention relates to display technology, and more particularly to a liquid crystal display panel and a method of fabricating the same.

The basic structure of the liquid crystal display includes an active device array substrate, a counter substrate, a sealant connecting the active device array substrate and the opposite substrate, and a liquid crystal material filled in a space defined by the active device array substrate, the opposite substrate, and the sealant. . Further, in order to further control the alignment of the liquid crystal molecules, an alignment film is deposited on the active device array substrate and the counter substrate in advance. The alignment film is usually made of a polymer material such as polyimine (PI), which is a non-conductive material. As a result, due to the presence of the alignment film, the circuit communication between the active device array substrate and the counter substrate causes some problems.

The present invention provides a method of manufacturing a liquid crystal display panel, comprising the following steps. Providing an active device array substrate and a counter substrate, wherein the active device array substrate includes a first substrate and a first electrode disposed on the first substrate The pole layer, the opposite substrate includes a second substrate and a second electrode layer disposed on the second substrate. A first alignment film is formed on the first electrode layer, and a second alignment film is formed on the second electrode layer. The sealant composition is applied to one of the first alignment film and the second alignment film, wherein the sealant composition includes an adhesive and conductive particles distributed in the adhesive. Forming an active device array substrate and a counter substrate, wherein the step of assembling the active device array substrate and the opposite substrate comprises heating the sealant composition to combine a portion of the conductive particles into a conductive material, the conductive material piercing the first alignment film and Second alignment film.

In an embodiment, the electrically conductive material is in contact with the first electrode layer and the second electrode layer.

In an embodiment, the electrically conductive particles contain nickel.

In an embodiment, the conductive particles have a diameter of less than 1 μm.

In an embodiment, the conductive particles have a diameter ranging from 10 nm to 500 nm.

In an embodiment, the sealant composition comprises from 1 wt% to 15 wt% of conductive particles.

In one embodiment, the sealant composition comprises from 1 wt% to 5 wt% of conductive particles.

The present invention also provides a liquid crystal display panel comprising an active device array substrate, an opposite substrate, a first alignment film, a second alignment film, and a sealant. The active device array substrate includes a first substrate and a first electrode layer disposed on the first substrate. The opposite substrate includes a second substrate and a second electrode layer disposed on the second substrate. The first alignment film is disposed on the first electrode layer. The second alignment film is disposed on the second electrode layer. The frame glue is disposed on the active device array substrate and the opposite base Between the boards. The sealant includes an adhesive and a conductive material in the adhesive, wherein the conductive material pierces the first alignment film and the second alignment film.

In an embodiment, the electrically conductive material contains nickel.

10‧‧‧ method

12‧‧‧ steps

14‧‧‧Steps

16‧‧‧Steps

18‧‧‧Steps

102‧‧‧Substrate

104‧‧‧First substrate

106‧‧‧First electrode layer

108‧‧‧First alignment film

202‧‧‧ opposite substrate

204‧‧‧second substrate

206‧‧‧Second electrode layer

208‧‧‧Second alignment film

300‧‧‧Frame glue composition

301‧‧‧Box glue

302‧‧‧Adhesive

304‧‧‧Electrical particles

306‧‧‧Electrical materials

400‧‧‧ gap

The invention will be more completely understood by reference to the accompanying drawings and the description of the embodiments of the invention. FIG. 1 is a flowchart of a method of manufacturing a liquid crystal display panel according to an embodiment of the present invention.

2 is a top plan view showing an intermediate stage of a method of fabricating a liquid crystal display panel according to an embodiment of the present invention.

3 is a cross-sectional view showing an intermediate stage of a method of fabricating a liquid crystal display panel in accordance with an embodiment of the present invention.

4 is a cross-sectional view showing an intermediate stage of a method of fabricating a liquid crystal display panel in accordance with an embodiment of the present invention.

In the following description, the phrase "at the center of", "on", "above", "under", "below", "before", "after", " The direction or positional relationship indicated by "left" and "right" is the direction or positional relationship with reference to the drawing. These phrases are used to simplify the description, and the use of these phrases does not mean that the described elements or devices require a particular configuration or orientation in operation. In addition, phrases such as "first" and "second" are used for descriptive purposes only. It should not be understood that a component is more important than another component. Unless otherwise stated, phrases such as "set in", "attach", and "connected" should be understood in a broader sense. For example, "connection" includes "fixed connection", "detachable connection" or "integrated connection", including "mechanical connection" or "electrical connection", including "direct connection" or "through the medium" connection". The meaning of these phrases in the present invention should be understood in accordance with their specific context. In addition, unless otherwise stated, in the following description, "plural" means "two or more than two."

1 is a flow chart of a method of fabricating a liquid crystal display panel in accordance with an embodiment of the present invention. In the following paragraphs, the steps shown in Fig. 1 will be discussed in detail with reference to Figs. 2 through 4. 2 is a top plan view showing an intermediate stage of a method of fabricating a liquid crystal display panel according to an embodiment of the present invention. 3 is a cross-sectional view showing an intermediate stage of a method of fabricating a liquid crystal display panel in accordance with an embodiment of the present invention.

1 and 3, a method 10 of manufacturing a liquid crystal display panel includes steps 12, 14, 14, and 18. At step 12, active device array substrate 102 and counter substrate 202 are provided. The active device array substrate 102 includes a first substrate 104 and a first electrode layer 106 disposed on the first substrate 104. The opposite substrate 202 includes a second substrate 204 and a second electrode layer 206 disposed on the second substrate 204.

The first substrate 104 may be a germanium wafer in which a plurality of active components (not shown) are formed, and the active components are arranged in an array. The active device may be a metal-oxide-semiconductor field effect (metal-oxide-semiconductor field effect) Transistors, MOSFETs or other active components. The first electrode layer 106 may be a pixel electrode layer and may be made of, for example, aluminum (Al). In other embodiments, the first substrate 104 may be a transparent substrate (eg, a glass substrate), and active elements such as thin film transistors (TFTs) may be formed in the first substrate 104.

The second substrate 204 may be a transparent substrate such as a glass substrate. The second electrode layer 206 may be a common electrode layer and may be made of a transparent conductive material such as indium tin oxide (ITO). The opposite substrate 202 may be a color filter substrate, and may include a black matrix (not shown) and a color filter layer (not shown), the black matrix defines a plurality of display areas, and the color filter layer Provided in the display area. It should be noted that the materials, structures, and fabrication methods of active components, color filters, and black matrices are well known to those of ordinary skill in the relevant art, and thus, for the sake of brevity of description, these details are omitted herein.

Continuing to refer to FIGS. 1 and 3, in step 14, a first alignment film 108 is formed on the first electrode layer 106 to form a second alignment film 208 on the second electrode layer 206. The first alignment film 108 and the second alignment film 208 may be formed by first coating a polymer layer on the first electrode layer 106 and the second electrode layer 206, and then, for example, at a temperature between 100 ° C and 180 ° C. The polymer layer is cured. The aforementioned polymer includes, for example, polyimine (PI), and can be coated on the electrode layer by any existing coating technique. After the coating and curing process, the alignment films 108 and 208 may be rubbed to obtain a predetermined alignment direction.

Referring to Figures 1, 2 and 3, in step 16, the box will be The glue composition 300 is coated on the second alignment film 208. In other embodiments, it is also possible to coat the sealant composition 300 on the first alignment film 108. It is noted that after the sealant composition 300 is applied, a gap 400 (shown in FIG. 2) is retained to facilitate subsequent filling of the liquid crystal material between the active device array substrate 102 and the counter substrate 202. The sealant composition 300 includes an adhesive 302 and a plurality of electrically conductive particles 304 dispersed in an adhesive 302. Adhesive 302 can be a heat curable adhesive. The conductive particles 304 can be selected such that in a subsequent process, a portion of the conductive particles 304 will combine upon heating to form a bulk conductive material (see Figure 4 and its associated description). In this regard, the conductive particles 304 may contain nickel.

Figure 4 is a schematic cross-sectional view following the stage shown in Figure 3. Note that FIGS. 3 and 4 are cross-sectional views taken along the direction AA of FIG. 2, respectively, after the positioning step and the heating step described below. Referring to FIGS. 1, 3, and 4, in step 18, the active device array substrate 102 and the counter substrate 202 are assembled. The assembly process includes the following steps. First, the active device array substrate 102 and the opposite substrate 202 are positioned such that the active device array substrate 102 and the opposite substrate 202 are separated by a plurality of spacers (not shown) to form a cell gap. Next, the assembly process further includes heating the sealant composition 300 to cure the adhesive 302 while merging a portion of the conductive particles 304 into the conductive material 306. It is noted that the conductive material 306 will naturally pierce the first alignment film 108 and the second alignment film 208. In addition, as shown in FIG. 4, the conductive material 306 is in contact with the first electrode layer 106 and the second electrode layer 206, thereby achieving the active device array substrate 102. Electrical communication with the counter substrate 202. A conventional method for achieving this is to first etch the alignment film to expose the electrode layer, and then to form an electrical connection between the electrode layers. Therefore, the method described herein omits the step of patterning. Thereafter, the liquid crystal material may be filled into a space defined by the active device array substrate 102, the opposite substrate 202, and the sealant 301.

Since the conductive material 306 is formed by combining a portion of the conductive particles 304, the size of the conductive material 306 is affected by the relative proportion of the conductive particles 304 and the adhesive 302 in addition to the diameter of the conductive particles 304. For example, if the diameter of the conductive particles 304 is too large, or the proportion of the conductive particles 304 in the adhesive 302 is too high, the size of the conductive material 306 may exceed a predetermined cell gap, resulting in uneven cell gap. In this regard, the conductive particles 304 may have a diameter of less than 1 μm and may, for example, range from 10 nm to 500 nm. Meanwhile, the sealant composition 300 may include 1 wt% to 15 wt% (in some examples, 1 wt% to 5 wt%) of the conductive particles 304.

Another embodiment of the present invention provides a liquid crystal display panel, which will be described below with reference to FIG. The liquid crystal display panel of the present invention includes an active device array substrate 102, a counter substrate 202, a first alignment film 108, a second alignment film 208, and a sealant 301. The active device array substrate 102 includes a first substrate 104 and a first electrode layer 106 disposed on the first substrate 104. The opposite substrate 202 includes a second substrate 204 and a second electrode layer 206 disposed on the second substrate 204. The first alignment film 108 is provided on the first electrode layer 106. The second alignment film 208 is disposed on the second electrode layer 206. The sealant 301 is disposed between the active device array substrate 102 and the opposite substrate 202. Frame glue 301 includes Adhesive 302 and conductive material 306 in adhesive 302, wherein conductive material 306 pierces first alignment film 108 and second alignment film 208. The first substrate 104, the first electrode layer 106, the first alignment film 108, the second substrate 204, the second electrode layer 206, the second alignment film 208, the adhesive 302, and the conductive material 306 may be the same as those described above. For the sake of brevity, a repeated description is omitted.

In summary, the present invention provides a method of fabricating a liquid crystal display panel and a liquid crystal display panel manufactured by the method. In this way, the process of establishing circuit communication between the active device array substrate and the opposite substrate and the process of coating the sealant are integrated. At the same time, additional circuit connection elements necessary in conventional methods can also be omitted. Therefore, the method of the present invention simplifies the process of the liquid crystal display panel and provides the possibility of further reducing the size of the liquid crystal display panel.

Although the present invention has been described in detail, it is understood that various changes, substitutions and changes may be made to the technical details described herein. Furthermore, the specific embodiments described in the specification of the invention are directed to the process, structure, article, composition, apparatus, method, or step. In view of the contents of the specification, those skilled in the art to which the invention pertains will be able to readily understand the processes, structures, articles, compositions, devices, methods or steps that are present in the present invention. The functions, or substantially the same results, can be used with the corresponding embodiments described herein. Accordingly, the application is intended to cover such processes, structures, articles, compositions, devices, methods or steps.

102‧‧‧Substrate

104‧‧‧First substrate

106‧‧‧First electrode layer

108‧‧‧First alignment film

202‧‧‧ opposite substrate

204‧‧‧second substrate

206‧‧‧Second electrode layer

208‧‧‧Second alignment film

301‧‧‧Box glue

302‧‧‧Adhesive

306‧‧‧Electrical materials

Claims (10)

A method for manufacturing a liquid crystal display panel, comprising: providing an active device array substrate and a pair of substrates, wherein the active device array substrate comprises a first substrate and a first electrode layer disposed on the first substrate, and the The opposite substrate includes a second substrate and a second electrode layer disposed on the second substrate; a first alignment film is formed on the first electrode layer, and a second alignment film is formed on the second electrode layer Applying a frame sealant composition to one of the first alignment film and the second alignment film, wherein the sealant composition comprises an adhesive and a plurality of conductive particles dispersed in the adhesive; Forming the active device array substrate and the opposite substrate, wherein the step of assembling the active device array substrate and the opposite substrate comprises heating the sealant composition to merge a portion of the conductive particles into a conductive material, the conductive The material pierces the first alignment film and the second alignment film. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the conductive material is in contact with the second electrode layer of the first electrode layer. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the conductive particles contain nickel. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the conductive particles have a diameter of less than 1 μm. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the conductive particles have a diameter of between 10 nm and 500 nm. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the sealant composition comprises from 1% by weight to 15% by weight of the conductive particles. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the sealant composition comprises from 1% by weight to 5% by weight of the conductive particles. A liquid crystal display panel comprising: an active device array substrate, comprising: a first substrate and a first electrode layer disposed on the first substrate; a pair of substrates, including a second substrate and the second substrate a second electrode layer; a first alignment film disposed on the first electrode layer; a second alignment film disposed on the second electrode layer; a sealant disposed on the active device array substrate and Between the opposite substrates, wherein the sealant comprises an adhesive and a conductive material located in the adhesive, the conductive material piercing the first alignment film and the second alignment film. Liquid crystal display as described in claim 8 a panel, wherein the conductive material is in contact with the first electrode layer and the second electrode layer. The liquid crystal display panel of claim 8, wherein the conductive material contains nickel.