WO2015096193A1

WO2015096193A1 - Liquid crystal dropping device

Info

Publication number: WO2015096193A1
Application number: PCT/CN2014/070023
Authority: WO
Inventors: 覃事建; 李春良
Original assignee: 深圳市华星光电技术有限公司; 覃事建; 李春良
Priority date: 2013-12-26
Filing date: 2014-01-02
Publication date: 2015-07-02
Also published as: CN203658712U

Abstract

A liquid crystal dropping device, comprising a liquid crystal container (10), a conveying pipeline (20) and at least one liquid crystal dropping nozzle (30). The liquid crystal dropping nozzle (30) is connected to the liquid crystal container (10) via the conveying pipeline (20), and the liquid crystal dropping device is provided with a heating device (40) for heating the liquid crystal. By arranging the heating device (40) for heating the liquid crystal on the liquid crystal dropping device, the temperature of the liquid crystal is increased so as to reduce the viscosity of the liquid crystal. When liquid crystal with a lower viscosity drops onto an alignment film onto a substrate, the diffusion area of the liquid crystal on the alignment film is larger, and the contact angle of the contact between the liquid crystal and the alignment film is smaller, so that an impact force to which the alignment film is subjected can be reduced, and the occurrence probability of the case of non-uniform display of a liquid crystal panel produced by the liquid crystal dropping and injection technologies is reduced.

Description

Liquid crystal dropping device

Technical field

The present invention relates to the field of liquid crystal panels, and in particular to a liquid crystal dropping device.

Background technique

The liquid crystal panel is an important component of the liquid crystal display. The liquid crystal injection method of the liquid crystal panel manufacturing process mostly adopts the dropping type injection technology. The dropping type injection technology firstly drops the liquid crystal directly onto a glass substrate through the liquid crystal dropping device, and then Group it with another glass. As shown in FIG. 1, the current liquid crystal dropping device is mainly composed of a liquid crystal container containing a liquid crystal, a conveying pipe assembly, and a liquid crystal dropping nozzle. However, when some liquid crystal panels for liquid crystal alignment are used to improve the viewing angle, when the liquid crystal is dropped onto the alignment film on the substrate by a drop-injection technique, the alignment film is affected by the impact of the liquid crystal droplets, which tends to cause uneven diffusion of the liquid crystal. This causes the drop pattern of the finished product to show unevenness. The current improvement is by increasing the amount of liquid crystal droplets dropped while reducing the amount of liquid crystal per drop. However, the improvement degree of this method is limited, and increasing the number of dropped liquid crystal droplets and reducing the amount of liquid crystal per drop affect the operation precision of the liquid crystal dropping device, and increase the processing time of the liquid crystal injection.

Therefore, it is necessary to propose a liquid crystal dropping device to solve the problems of the prior art.

Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a liquid crystal dropping device which is intended to improve the problem of uneven diffusion of liquid crystal dropped onto a substrate, thereby preventing the display panel from being unevenly displayed.

The invention provides a liquid crystal dropping device, comprising a liquid crystal container, a conveying pipeline and at least one liquid crystal dropping nozzle, wherein the liquid crystal dropping nozzle communicates with the liquid crystal container via the conveying pipeline, and the liquid crystal dropping device is provided on the liquid crystal dropping device A heating device that heats the liquid crystal.

Preferably, the heating device is disposed on the liquid crystal container.

Preferably, the heating device is disposed on the liquid crystal dropping nozzle.

Preferably, the heating device is disposed on the delivery line.

Preferably, the conveying pipeline comprises a main pipe, a liquid separator and at least one branch pipe, wherein the liquid separator communicates with the liquid crystal container via the main pipe; the liquid crystal dropping nozzle corresponds to the branch pipe one by one, and Its corresponding branch pipe is in communication with the liquid separator.

Preferably, the heating device is disposed on the dispenser.

Preferably, the heating device is disposed on the main pipe.

Preferably, the heating device is disposed on the branch pipe.

Preferably, the heating device includes a heating member and a temperature controller electrically connected to the heating member.

Preferably, the heating member is an externally wound coil wound on a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or the heating member is coated on the liquid crystal The heating cotton on the liquid crystal transport path formed by the nozzle, the transfer line, and the liquid crystal drop nozzle.

In the liquid crystal dropping device of the present invention, by providing a heating device for heating the liquid crystal on the liquid crystal dropping device to lower the temperature of the liquid crystal to lower the viscosity of the liquid crystal, and the liquid crystal having a low viscosity drops onto the alignment film on the substrate, the liquid crystal is aligned. The area of diffusion on the film is larger, and the contact angle of the liquid crystal in contact with the alignment film is small, so that the impact force of the alignment film can be reduced, thereby reducing the probability of occurrence of uneven display of the liquid crystal panel by the liquid crystal dropping injection technology.

DRAWINGS

1 is a view showing an example of the structure of a conventional liquid crystal dropping device;

Figure 2 is a view showing an example of the structure of a first embodiment of the liquid crystal dropping device of the present invention;

Figure 3 is a view showing an example of the structure of a second embodiment of the liquid crystal dropping device of the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

2 and FIG. 3, FIG. 2 is a view showing an example of the structure of a first embodiment of the liquid crystal dropping device of the present invention, and FIG. 3 is a view showing an example of the structure of the second embodiment of the liquid crystal dropping device of the present invention.

Referring to FIG. 2, the liquid crystal dropping device of the present embodiment includes a liquid crystal container 10, a conveying pipe 20, and at least one liquid crystal dropping nozzle 30. The liquid crystal dropping nozzle 30 communicates with the liquid crystal container 10 via the conveying pipe 20, and the liquid crystal dropping device is provided. There is a heating device 40 for heating the liquid crystal. A pump device is built in each of the liquid crystal dropping nozzles 30, and the pump device in the liquid crystal dropping nozzle 30 sucks the liquid crystal from the liquid crystal container 10 into the liquid crystal dropping head 30 through the conveying line 20, and then quantitatively drops onto the glass substrate.

In the liquid crystal dropping device of the present embodiment, by providing a heating device 40 for heating the liquid crystal on the liquid crystal dropping device, the viscosity of the liquid crystal is lowered by raising the temperature of the liquid crystal, and when the liquid crystal having low viscosity drops onto the alignment film on the substrate, The area of the liquid crystal diffused on the alignment film is larger, and the contact angle of the liquid crystal and the alignment film is smaller, which can reduce the impact force of the alignment film, thereby reducing the uneven display of the liquid crystal panel by the liquid crystal drop injection technology. The probability of occurrence.

The heating device 40 in this embodiment may be one or more. The heating device 40 in this embodiment may be disposed on the liquid crystal container 10, or disposed on the liquid crystal dropping head 30, or disposed on the conveying line 20. The heating device 40 in this embodiment can also be provided on the entire conveying path composed of the liquid crystal container 10, the liquid crystal dropping head 30, and the conveying line 20. The heating device 40 in this embodiment may also be disposed on any of the liquid crystal container 10, the liquid crystal dropping head 30, and the delivery line 20. Since the liquid crystal dropping nozzle 30 is usually made of stainless steel, it is difficult to heat the liquid crystal dropping nozzle 30. The liquid crystal container 10 is used for storing liquid crystals, and usually does not run out at one time, and the remaining liquid crystal needs to be heated again after the next use. Heating the liquid crystal easily affects the performance of the liquid crystal. For the above reasons, in the present embodiment, the heating device 40 is preferably disposed on the conveying line 20, and the heating device 40 is disposed on the conveying line 20 as an example, and the liquid crystal dropping device of the present embodiment will be described.

Further, referring to FIG. 3, the present embodiment is based on the solution of the first embodiment. The conveying line 20 of the liquid crystal dropping device of the embodiment comprises a main pipe, a liquid separator and at least one branch pipe (in this embodiment, three branch pipes are taken as an example), the liquid separator is connected to the liquid crystal container 10 via the main pipe; the liquid crystal dropping nozzle 30 and the branch pipe One-to-one correspondence, and through the corresponding branch pipe and the liquid separator. The liquid crystal in the liquid crystal container 10 is transported to the liquid separator through the main pipe, and each liquid crystal dropping head 30 sucks out the liquid crystal from the liquid separator.

The heating device 40 in this embodiment may be disposed on the liquid separator, or disposed on the main pipe, or disposed on the branch pipe. Of course, the heating device 40 can also be disposed on the entire conveying line 20, or can be disposed on any two of the main pipe, the liquid separator and the branch pipe. Since the liquid crystal dropping nozzle 30 has a very small amount of liquid crystal (usually several milligrams) dropped at one time, the heating device 40 is disposed on the main pipe or the liquid separator, and the liquid crystal also needs to pass through the branch pipe to reach the liquid crystal dropping nozzle 30 and drip onto the substrate. The liquid crystal heated at the main pipe or the liquid separator may lose heat in the branch pipe portion to be cooled, and finally the temperature of the liquid crystal dropped from the liquid crystal dropping head 30 onto the substrate is lower than the temperature of the liquid crystal in the liquid separator. Since the branch pipe is directly connected to the liquid crystal dropping nozzle 30, the heating device 40 is disposed on the branch pipe so that the heated liquid crystal directly reaches the liquid crystal dropping nozzle 30, and is cooled without any pipeline to ensure the temperature of the liquid crystal, and the effect is optimal. . Based on the above considerations, the heating device 40 of the present embodiment is preferably provided with a heating device 40 disposed on a branch pipe, and the heating device 40 is disposed on the branch pipe as an example, and the present embodiment will be described.

Further, in the present embodiment, the heating device 40 includes a heating member 41 and a temperature controller (not shown) electrically connected to the heating member 41. The heating member 41 directly contacts the outside of the liquid crystal transport path composed of the liquid crystal container 10, the transport line 20, and the liquid crystal drip head 30, and heats the liquid crystal in the liquid crystal transport path. The temperature controller is electrically coupled to the heating element 41 to control the heating temperature of the heating element 41 (typically less than 60 ° C to ensure that the performance of the liquid crystal is not destroyed by excessive temperature). The heating element 41 is in one-to-one correspondence with the branch pipe, and the temperature controller may be one, electrically connected to each heating element 41 and controlling the temperature of each heating element 41; the number of temperature controllers may also correspond to the number of heating elements 41, a temperature controller and The corresponding heating members 41 are electrically connected to control the temperature of the corresponding heating member 41.

Further, the heating member 41 may be an externally wound coil wound on a liquid crystal conveying path formed by the liquid crystal container 10, the conveying pipe 20, and the liquid crystal dropping nozzle, and the heating member 41 may be coated on the liquid crystal container 10. The heating line on the liquid crystal conveying path formed by the nozzle 20 and the liquid crystal dropping nozzle. Of course, the heating member 41 can also be other components disposed on the liquid crystal conveying path. In the embodiment, the heating member 41 is taken as a heating cotton.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

A liquid crystal dropping device, comprising: a liquid crystal container, a conveying pipeline and at least one liquid crystal dropping nozzle, wherein the liquid crystal dropping nozzle communicates with the liquid crystal container via the conveying pipeline, and the liquid crystal dropping device is provided with A heating device for heating a liquid crystal.
A liquid crystal dropping device according to claim 1, wherein said heating means comprises a heating member and a temperature controller electrically connected to said heating member.
The liquid crystal dropping device according to claim 2, wherein the heating member is an externally wound coil wound around a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or The heating element is a heating cotton that is coated on a liquid crystal transport path formed by the liquid crystal container, the transport line, and the liquid crystal dripping head.
A liquid crystal dropping device according to claim 1, wherein said heating means is provided on said liquid crystal container.
A liquid crystal dropping device according to claim 4, wherein said heating means comprises a heating member and a temperature controller electrically connected to said heating member.
The liquid crystal dropping device according to claim 5, wherein the heating member is an externally wound coil wound around a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or The heating element is a heating cotton that is coated on a liquid crystal transport path formed by the liquid crystal container, the transport line, and the liquid crystal dripping head.
A liquid crystal dropping device according to claim 1, wherein said heating means is provided on said liquid crystal dropping head.
A liquid crystal dropping device according to claim 7, wherein said heating means comprises a heating member and a temperature controller electrically connected to said heating member.
The liquid crystal dropping device according to claim 8, wherein the heating member is an externally wound coil wound around a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or The heating element is a heating cotton that is coated on a liquid crystal transport path formed by the liquid crystal container, the transport line, and the liquid crystal dripping head.
A liquid crystal dropping device according to claim 1, wherein said heating means is provided on said conveying line.
A liquid crystal dropping device according to claim 10, wherein said heating means comprises a heating member and a temperature controller electrically connected to said heating member.
The liquid crystal dropping device according to claim 11, wherein the heating member is an externally wound coil wound around a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or The heating element is a heating cotton that is coated on a liquid crystal transport path formed by the liquid crystal container, the transport line, and the liquid crystal dripping head.
A liquid crystal dropping device according to claim 10, wherein said conveying pipe comprises a main pipe, a liquid separator, and at least one branch pipe, said liquid separator being in communication with said liquid crystal container via said main pipe; said liquid crystal The drip nozzles are in one-to-one correspondence with the branch pipes, and communicate with the liquid separators via their corresponding branch pipes.
A liquid crystal dropping device according to claim 13, wherein said heating means comprises a heating member and a temperature controller electrically connected to said heating member.
The liquid crystal dropping device according to claim 14, wherein the heating member is an externally wound coil wound around a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or The heating member is a heating cotton that is coated on a liquid crystal transport path formed by the liquid crystal container, the transport line, and the liquid crystal dripping head.
A liquid crystal dropping device according to claim 13, wherein said heating means is provided on said liquid separator.
The liquid crystal dropping device according to claim 13, wherein said heating means is provided on said main pipe.
A liquid crystal dropping device according to claim 13, wherein said heating means is provided on said branch pipe.
A liquid crystal dropping device according to claim 18, wherein said heating means comprises a heating member and a temperature controller electrically connected to said heating member.
The liquid crystal dropping device according to claim 19, wherein the heating member is an externally wound coil wound around a liquid crystal conveying path formed by the liquid crystal container, the conveying pipe, and the liquid crystal dropping nozzle, or The heating element is a heating cotton that is coated on a liquid crystal transport path formed by the liquid crystal container, the transport line, and the liquid crystal dripping head.