WO2015054955A1

WO2015054955A1 - Alignment liquid nozzle

Info

Publication number: WO2015054955A1
Application number: PCT/CN2013/089827
Authority: WO
Inventors: 黄炳成; 黄笑宇
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2013-10-17
Filing date: 2013-12-18
Publication date: 2015-04-23
Also published as: CN103487993A

Abstract

An alignment liquid nozzle (10) for coating alignment liquid on a substrate. The alignment liquid nozzle (10) comprises a first side plate (111) and a second side plate (112) that are oppositely arranged, an injection opening (110) formed therebetween for injecting the alignment liquid into the alignment liquid nozzle (10), the first side plate (111) comprising a first upper edge (1111) and a first lower edge (1112) that are arranged on the two opposite sides, the second side plate (112) comprising a second upper edge (1121) and a second lower edge (1122) that are arranged corresponding to the first upper edge (1111) and the first lower edge (1112) respectively, a gap-shaped spraying opening (120) formed between the first lower edge (1112) and the second lower edge (1122) for spraying out the alignment liquid, the injection opening (110) being communicated with the spraying opening (120). The alignment liquid is uniformly coated on the substrate by using the alignment liquid nozzle (10).

Description

Aligning liquid nozzle

Technical field

The present invention relates to a coating apparatus, and more particularly to an alignment liquid nozzle that sprays an alignment liquid to a substrate.

Background technique

In the manufacturing process of a thin film crystal liquid crystal display, a polyimide resin (ie, an alignment liquid) is usually coated on a substrate and a color filter substrate, and the alignment liquid is pretilted to a liquid crystal molecule by rubbing or photolithography. A bearing angle.

In the prior art, a coating method for an alignment liquid is disclosed, that is, a plurality of alignment liquid nozzles and a glass substrate are provided; a plurality of alignment liquid nozzles are arranged in a line in a tightly aligned manner, so that the alignment length of the alignment liquid nozzles and the glass are arranged. The widths of the substrates are equal; a plurality of alignment liquid nozzles are opened to cause each of the alignment liquid nozzles to simultaneously drop the alignment droplets at a set flow rate and move the glass substrate to form an alignment film. The film is smoothed evenly by a doctor blade which is disposed above the moving glass substrate on which the alignment liquid is dropped. In this technique, although the alignment liquid can be simultaneously dropped on the substrate, the alignment liquid applied on the substrate is not uniform due to a certain gap between the alignment liquid alignment nozzle and the alignment liquid nozzle. And the coating process is complicated.

Summary of the invention

The object of the present invention is to provide an alignment liquid which is uniformly coated and has a simple coating process, in view of the defects in the prior art that the prior art coating solution is not uniform and the coating process is complicated. nozzle.

The invention provides an alignment liquid nozzle for coating an alignment liquid to a substrate, the alignment liquid nozzle includes a first side plate and a second side plate which are oppositely disposed, and the first side plate and the second side plate Forming an injection port for the alignment liquid to enter the alignment liquid nozzle, the first side plate including a first upper edge and a first lower edge on opposite sides, the second side plate including the a first upper edge and a second lower edge corresponding to the first lower edge, A slit-shaped discharge port for discharging the alignment liquid is formed between the first lower edge and the second lower edge, and the injection port is in communication with the discharge port.

In the above alignment liquid nozzle, the length of the discharge port in the width direction of the substrate is equal to the width of the substrate.

The alignment liquid nozzle further includes a first connecting plate connected between the first lower edge of the first side plate and the second lower edge of the second side plate, The discharge port is opened on the first connecting plate.

In the above alignment liquid nozzle, the distance between the first upper edge and the second upper edge is greater than the distance between the first lower edge and the second lower edge.

In the alignment liquid nozzle described above, the first side plate and the second side plate are straight strip plates, and the lengths in the width direction of the substrate are both greater than or equal to the width of the substrate.

In the above alignment liquid nozzle, the alignment liquid nozzle further includes a scraper, and the scraper is fixedly coupled to the second side plate.

In the alignment liquid nozzle described above, the second side plate and the doctor blade are integrally formed.

In the above alignment liquid nozzle, the alignment liquid nozzle further includes a second connection plate connected between the first upper edge of the first side plate and the second upper edge of the second side plate The second connecting plate is provided with at least one injection port for injecting an alignment liquid.

In the above alignment liquid nozzle, the first side plate, the second side plate, and the second connecting plate enclose a conveying passage that communicates with the injection port and the discharge port for conveying the alignment liquid.

In the alignment liquid nozzle described above, the first side plate, the second side plate, and the second connecting plate are integrally formed.

The invention has the beneficial effects that the invention realizes the width of the substrate by fixing the two plates at one end close to the substrate and opening a slit-like opening at the joint, and the length of the opening is not less than the width of the substrate. The alignment liquid coated in the direction is uniform and continuous, and there is no gap. When the alignment liquid nozzle of such a configuration is used, it is only necessary to discharge a set amount of the alignment liquid from the slit-shaped discharge port to achieve uniform coating, which simplifies the coating operation. The structure in which the distance between the two plates is gradually reduced increases the stability of the alignment liquid nozzle structure and improves its service life.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic view showing the working principle of the alignment liquid nozzle provided by the present invention;

2 is a schematic structural view of a first preferred embodiment of an alignment liquid nozzle provided by the present invention;

3 is a schematic structural view of a second preferred embodiment of the alignment liquid nozzle provided by the present invention;

4 is a schematic view showing the structure of a third preferred embodiment of the alignment liquid nozzle provided by the present invention.

detailed description

The alignment liquid nozzle provided by the invention is mainly applied to the field of liquid crystal panel production, and is used for coating the alignment liquid. The alignment liquid nozzle provided by the present invention has a slit type discharge port, and the length of the discharge port is not less than the width of the substrate. Thus, the alignment liquid nozzle discharges the alignment liquid to the substrate continuously, and is uniformly distributed on the substrate. At the same time, each of the aligning liquids ejected is as wide as the substrate, which makes the alignment liquid ejected in the width direction uniform. When the alignment liquid nozzle of such a configuration is used, it is only necessary to discharge a set amount of the alignment liquid from the slit-shaped discharge port to achieve uniform coating, which simplifies the coating operation. The structure in which the distance between the two plates is gradually reduced increases the stability of the alignment liquid nozzle structure and improves its service life.

Referring to FIG. 1, the alignment liquid nozzle 10 provided by the present invention is suspended above the substrate 20. The substrate 20 is translated in the a direction such that the alignment liquid nozzle 10 can apply the alignment liquid over the entire substrate 20 s surface. The alignment liquid nozzle 10 is disposed at an end of the substrate 20 away from the injection port 110 communicating with the feeding device for conveying the alignment liquid, which is adjacent to the substrate 20 One end of the discharge port 120 for discharging the alignment liquid to the substrate 20 is provided. The injection port 110 is in communication with the discharge port 120. When the alignment liquid is applied, a predetermined amount of the alignment liquid is sent to the injection port 110 by the feeding device, and is sprayed toward the substrate 20 through the discharge port 120.

Referring to FIG. 2, the alignment liquid nozzle 10 provided by the present invention includes a first side plate 111 and a second side plate 112 which are oppositely disposed. The first side plate 111 includes a first upper edge 1111 and a first lower edge 1112 on opposite sides. The second side panel 112 includes a second upper edge 1121 and a second lower edge 1122 that respectively correspond to the first upper edge 1111 and the first lower edge 1112. A discharge port 120 for injecting an alignment liquid is formed between the first lower edge 1112 and the second lower edge 1121. The discharge port 120 has a slit shape, and the slit may be linear, wavy or curved. The length of the ejection port 120 in the width direction of the substrate 20 is not less than the width of the substrate 20, that is, the projection length of the ejection port 120 on a plane perpendicular to the translation direction of the substrate 20 is not less than the length projected by the substrate 20 on the plane. Thus, the alignment liquid ejected from the alignment liquid nozzle 10 is continuously and uniformly continuous in the width direction of the substrate 20. In order not to cause waste of the alignment liquid, the length of the discharge port 120 is designed to be the same as the width of the substrate 20. In this embodiment, one end of the first side plate 111 and the second side plate 112 away from the substrate 20 is spaced apart by a certain distance and thereby forms a space having an opening, which can be used as the injection port 110. In other embodiments, the first side plate 111 and the second side plate 112 may both be disposed parallel to the substrate 20, and the ejection outlet 120 may also serve as the injection port 110. In the present embodiment, the first side plate 111 and the second side plate 112 may have a straight strip shape, and the length in the width direction of the substrate 20 may be greater than or equal to the width of the substrate 20.

In order to make the alignment liquid nozzle 10 further have an alignment liquid space for accommodating the injection, the two side walls of the first side plate 111 at opposite positions and the two side walls of the second side plate 112 at opposite positions may be joined together, which may be completely Engaging or partially engaging, thus forming a receiving chamber connected between the injection port 110 and the discharge port 120 for accommodating the injected alignment liquid, and also diffusing the alignment liquid uniformly along the length of the discharge port 120 .

In order to make the structure of the alignment liquid nozzle 10 more stable and easy to fix, the first side plate 111 and the second side plate 112 are designed such that the distance between the first upper edge 1111 and the second upper edge 1121 is greater than the first lower edge. The distance between 1112 and the second lower edge 1122.

In the present embodiment, in order to make the alignment liquid coated on the substrate 20 more uniform and to reduce the coating process, the doctor blade 130 is disposed on one side of the alignment liquid nozzle 20, and is fixedly coupled to the second side plate 112. In the present embodiment, the blade 130 is disposed obliquely and extends away from one side of the second side plate 112. To simplify the manufacturing and assembly process, the doctor blade 130 can be integrally formed with the second side panel 112. More preferably, the first side panel 111, the second side panel 112, and the doctor blade 130 are integrally formed. The length of the scraper 130 coincides with the length of the discharge port 120.

The present invention also provides a second embodiment. Referring to FIG. 3, this embodiment differs from the first embodiment only in that the alignment liquid nozzle 10 further includes a first connecting plate 114, and the first connecting plate 114 is connected between the first lower edge 1112 and the second lower edge 1122. The discharge port 120 is opened on the first connecting plate 114.

The present invention also provides a third embodiment. Referring to FIG. 3, this embodiment differs from the first embodiment in that a second connecting plate 113 is disposed at an end of the first side plate 111 and the second side plate 112 away from the substrate 20. The second connecting plate 113 can be fixedly connected between the first side plate 111 and the second side plate 112. At least one through hole is opened in the second connecting plate 113 as an injection port 110 for the alignment liquid. The first side plate 111, the second side plate 112, and the second connecting plate 113 enclose a communication inlet 110 and a discharge port 120. Feed channel (not labeled). In order to simplify the manufacturing process, it is preferable to integrally form the first side plate 111, the second side plate 112, and the second connecting plate 113. Of course, the second connecting plate 113 can also be rotatably connected to one of the first side plate 111 or the second side plate 112, preferably in a hinged manner. When the alignment liquid needs to be injected, the second connecting plate 113 is opened. Just fine. It will be appreciated that the third embodiment can also be combined with the structure of the alignment liquid nozzle 10 of the second embodiment to form a new alignment liquid nozzle structure.

The alignment liquid nozzle 10 provided by the present invention can realize continuous uninterrupted liquid discharge in the width direction of the substrate 20. This allows the amount of alignment liquid applied to the substrate 20 to be the same and uniform in distribution. At the same time, a scraper 130 is disposed on one side of the alignment liquid nozzle 10. When the alignment liquid nozzle is coated, the scraper 130 can hang the alignment liquid on the substrate 20 in time to make the coating uniform and flat, to a certain extent. Guaranteed production quality, increased production efficiency and reduced production costs.

It is to be understood that those skilled in the art will be able to make modifications and changes in accordance with the above description, and all such modifications and variations are intended to be included within the scope of the appended claims.

Claims

An alignment liquid nozzle for coating an alignment liquid to a substrate, wherein the alignment liquid nozzle includes a first side plate and a second side plate disposed opposite to each other, and the first side plate and the second side plate are formed An injection port for the alignment liquid to enter the alignment liquid nozzle, the first side plate includes a first upper edge and a first lower edge on opposite sides, and the second side plate includes the first and the first side respectively a second upper edge and a second lower edge corresponding to the upper edge and the first lower edge, and a slit-like spray for ejecting the alignment liquid is formed between the first lower edge and the second lower edge An outlet, the injection port being in communication with the discharge port.
The alignment liquid nozzle according to claim 1, wherein a length of the discharge port in a width direction of the substrate is equal to a width of the substrate.
The alignment liquid nozzle according to claim 2, wherein the alignment liquid nozzle further includes a first connection plate, the first connection plate being coupled to the first lower edge and the second side of the first side plate Between the second lower edges of the plates, the first connecting plate is provided with the discharge port.
The alignment liquid nozzle of claim 3, wherein a distance between the first upper edge and the second upper edge is greater than a distance between the first lower edge and the second lower edge.
The alignment liquid nozzle according to claim 4, wherein the first side plate and the second side plate are both straight strip plates and the length in the width direction of the substrate is greater than or equal to the width of the substrate.
The alignment liquid nozzle of claim 1, wherein the alignment liquid nozzle further comprises a doctor blade fixedly coupled to the second side plate.
The alignment liquid nozzle according to claim 6, wherein the second side plate and the doctor blade are integrally formed.
The alignment liquid nozzle according to claim 1, wherein the alignment liquid nozzle further includes a second connection plate connected to the first upper edge and the second side plate of the first side plate Between the second upper edges, the second connecting plate is provided with at least one injection port for injecting the alignment liquid.
The alignment liquid nozzle according to claim 8, wherein the first side plate, the second side plate, and the second connecting plate enclose a conveying passage that communicates the injection port and the discharge port for transporting Said alignment liquid.
The alignment liquid nozzle according to claim 8, wherein the first side plate, the second side plate, and the second connecting plate are integrally formed structures.