CN108490653B

CN108490653B - Apparatus for homogenizing a substrate film and method of coating a substrate with a film

Info

Publication number: CN108490653B
Application number: CN201810259449.8A
Authority: CN
Inventors: 黄建龙; 张夏
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2018-03-27
Filing date: 2018-03-27
Publication date: 2021-06-01
Anticipated expiration: 2038-03-27
Also published as: CN108490653A

Abstract

The application relates to the field of liquid crystal displays and discloses equipment for homogenizing a substrate film layer and a method for coating the substrate film layer. The apparatus includes a carrier system for carrying the substrate and a vibration system for providing vibrations to the substrate. By the method, the substrate film layer can be homogenized, and the uneven brightness of the display caused by the uneven substrate film layer is improved.

Description

Apparatus for homogenizing a substrate film and method of coating a substrate with a film

Technical Field

The present disclosure relates to the field of liquid crystal displays, and more particularly, to an apparatus for homogenizing a substrate film and a method for coating a substrate with a film.

Background

Liquid crystal displays, which are flat, ultra-thin display devices, consist of a certain number of color or black and white pixels placed in front of a light source or a reflective surface. Liquid crystal displays are very low power consuming and are therefore favored by engineers for use in battery-operated electronic devices. The main principle is that the current stimulates the liquid crystal molecules to generate points, lines and surfaces which are matched with the back lamp tube to form a picture.

The working principle of the liquid crystal display is as follows: the liquid crystal is a special substance between solid and liquid, which is an organic compound, normally in a liquid state, but its molecular arrangement is very regular as that of a solid crystal, and therefore, it is called a liquid crystal, and another special property thereof is that if an electric field is applied to the liquid crystal, its molecular arrangement is changed, and at this time if a polarizing plate is fitted thereto, it has a function of preventing light from passing therethrough (light can pass smoothly without applying an electric field), and if a color filter is fitted thereto, the magnitude of voltage applied to the liquid crystal is changed, so that the amount of light transmission of a certain color can be changed, and also it can be said that the transmittance thereof can be changed by changing the voltage applied to both ends of the liquid crystal.

The substrate coating of the existing liquid crystal display mostly adopts APR transfer printing, namely coating film liquid is dripped on an anilox roller through a nozzle by utilizing pressure, the coating film liquid on the anilox roller is leveled by a doctor blade, the coating film liquid in a groove of the anilox roller is extruded and taken away by a circular projection on the APR plate, and the coating film liquid is uniformly transferred to the substrate. However, when the APR plate is used for coating by transfer printing, the coating film liquid cannot be uniformly coated on the glass substrate in the transfer printing process, so that the coating film liquid presents an uneven appearance after being baked at high temperature, which easily causes uneven brightness of the liquid crystal display.

Content of application

The technical problem that this application mainly solved is to provide an apparatus for making the substrate film layer uniform and a method for coating film layer on the substrate, which can improve the problem of uneven display brightness caused by uneven substrate film layer.

In order to solve the technical problem, the application adopts a technical scheme that: an apparatus for homogenizing a substrate film layer is provided, comprising: the bearing system is used for bearing the substrate, and the vibration system provides vibration for the substrate.

In order to solve the above technical problem, another technical solution adopted by the present application is: a method for coating a film layer on a substrate is provided, which comprises the following steps: coating a flowable film layer on a substrate; providing vibration to the substrate to make the film layer tend to be uniform under the action of vibration; and curing the film layer.

The beneficial effect of this application does: in contrast to the state of the art, the present application provides an apparatus for homogenizing a substrate film layer, the apparatus comprising a carrier system for carrying the substrate and a vibration system for providing vibrations to the substrate. By the method, the substrate film layer can be homogenized, and the uneven brightness of the display caused by the uneven substrate film layer is improved.

Drawings

FIG. 1 is a schematic diagram illustrating an embodiment of an apparatus for homogenizing a substrate film according to the present disclosure;

FIG. 2 is a schematic structural diagram of an embodiment of a vibration system of the apparatus for homogenizing a substrate film according to the present application;

FIG. 3 is a side schematic view of an embodiment of a vibrator rod of the apparatus for homogenizing a substrate film of the present application;

FIG. 4 is a schematic cross-sectional view of an embodiment of an eccentric rotor of a vibrator rod of the apparatus for homogenizing a substrate film of the present application;

FIG. 5 is a flowchart illustrating an implementation procedure of an embodiment of a method for coating a film on a substrate according to the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the embodiments described below in the present application are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

FIG. 1 is a schematic structural diagram of an embodiment of an apparatus for homogenizing a substrate film according to the present disclosure.

Referring to fig. 1, in one embodiment of an apparatus for homogenizing a film on a substrate, the apparatus includes a carrier system 10 and a vibration system 20, the carrier system 10 is used for carrying a substrate on which a flowable film is coated, and the vibration system 20 provides vibration to the substrate to homogenize the film under the vibration.

The carrier system 10 includes a carrier platform 11 for placing a substrate, and the carrier platform 11 is supported on a vibration conduction platform 23.

The carrying system 10 further includes a vacuum platform 12 located between the carrying platform 11 and the vibration conducting platform 23, a vacuum chamber 120 is disposed on the vacuum platform 12, and the vacuum platform 12 can prevent the carrying platform 11 and the substrate from moving relatively. The carrying platform 11 is provided with an absorption hole 110 for communicating with the vacuum chamber 120 to absorb the substrate on the carrying platform 11 under the vacuum action of the vacuum chamber 120, and the size and shape of the absorption hole 110 are only shown schematically in the figure.

Wherein the device further comprises a shock mount 30, the shock mount 30 acts as a buffer to weaken the damage caused by the shock to the device and the substrate, and the shock conducting platform 23 is further supported on the shock mount 30.

The above embodiments are merely illustrative and do not limit the scope of the present application.

FIG. 2 is a schematic structural diagram of an embodiment of a vibration system of the apparatus for homogenizing a substrate film.

The vibration system 20 includes a vibration rod 21, a motor 22 and a vibration conduction platform 23, wherein the vibration rod 21 is disposed in the vibration conduction platform 23 and is driven by the motor 22 to generate vibration.

Wherein, be provided with a plurality of storage tanks 230 on the vibrations conduction platform 23, the vibrations stick 21 is in storage tank 230 with removable mode insertion, and makes motor 22 expose in storage tank 230 outside, and this removable mode can be threaded connection, buckle connection and hinged joint, and storage tank 230 can be circular barrel, also can be other shapes, and the size of storage tank 230 and the size of vibrations stick 21 can not be the same, all do not specifically to limit above.

The number of the receiving grooves 230 is at least two that are arranged along the length direction of the vibration conduction platform 23 at intervals, and the vibration rods 21 are respectively inserted therein. The number of the receiving grooves 230 may be the same as or different from that of the vibrator rods 21, and similarly, the number of the receiving grooves 230 may be the same as or different from that of the motors 22, and is not particularly limited herein.

The motor body 220 of the motor 22 is fixedly coupled to the housing 210 such that the vibrator rod 21 and the motor 22 form an integral unit.

FIG. 3 is a side schematic view of an embodiment of a vibrator rod of the apparatus for homogenizing a substrate film of the present application.

FIG. 4 is a schematic cross-sectional view of an embodiment of an eccentric rotor of a vibrator rod of the apparatus for homogenizing a substrate film according to the present invention.

Referring to fig. 2 and 3, the vibration rod 21 includes a housing 210 and an eccentric rotor 211 disposed in the housing 210, wherein the eccentric rotor 211 is connected to a rotating shaft 221 of the motor 22 and eccentrically rotates under the driving of the motor 22.

The vibration rod 21 further includes at least two supporting members 212 disposed in the housing 210 at intervals along the axial direction of the housing 210, as shown in fig. 4, the eccentric rotor 211 includes a rotating rod 2110 rotatably supported on the two supporting members 212 and a weight 2111 eccentrically disposed with respect to the central axis of the rotating rod 2110, wherein one end of the rotating rod 2110 is connected to the rotating shaft of the motor 22, and is further driven by the rotating shaft 221 to rotate relative to the supporting members 212. When the motor 22 rotates the eccentric rotor 211, since the weight 2111 of the eccentric rotor 211 is eccentrically disposed with respect to the central axis of the rotating rod 2110, the center of gravity of the eccentric rotor 211 is not located on the rotating rod 2110, and the eccentric rotor 211 is vibrated by the uneven centrifugal force.

The application provides a device for homogenizing a substrate film layer, which comprises a bearing system and a vibration system, wherein the bearing system is used for bearing the substrate, and the vibration system provides vibration for the substrate. By the method, the substrate film layer can be homogenized, and the uneven brightness of the display caused by the uneven substrate film layer is improved.

S1: a flowable film layer is coated on a substrate.

S2: providing vibration to the substrate to make the film layer tend to be uniform under the action of vibration.

S3: and curing the film layer.

The equipment for homogenizing the substrate film layer comprises a bearing system, a vibration system and a damping base, wherein the bearing system comprises a bearing platform and a vacuum platform, the bearing platform is used for placing the substrate, and the bearing platform is supported on a vibration conduction platform. The vacuum platform is located between the bearing platform and the vibration conduction platform, and a vacuum cavity is arranged on the vacuum platform. Be provided with the absorption hole that is used for communicateing the vacuum chamber on the load-bearing platform to adsorb the base plate on the load-bearing platform under the vacuum effect of vacuum chamber, relative movement can take place for load-bearing platform and base plate to vacuum platform. The shock mount plays a cushioning role, weakens the damage that vibrations caused equipment and base plate, and the vibrations conduction platform is further supported on the shock mount.

Placing the substrate on a bearing platform, adsorbing the substrate on the bearing platform under the vacuum action of a vacuum chamber, coating a flowable film layer on the substrate, providing vibration to the substrate by a vibration system, enabling the flowable film layer to flow after being vibrated, uniformly coating the flowable film layer on the substrate, and then curing the flowable film layer to solidify and form the flowable film layer.

The flowable film layer can be a polyimide film which is a film type insulating material with the best performance in the world and is prepared by polycondensation, film-casting and imidization of pyromellitic dianhydride and diaminodiphenyl ether in a strong polar solvent.

The vibration system comprises a vibration rod, a motor and a vibration conduction platform, wherein the vibration rod is arranged in the vibration conduction platform, and the vibration system provides vibration for the substrate, namely the vibration rod generates vibration under the driving of the motor.

Wherein the motor body of the motor is fixedly connected with the shell, so that the vibration rod and the motor form an integral component.

Wherein, the vibrting spear includes the shell and sets up the eccentric rotor in the shell, the eccentric rotor is connected with the pivot of motor to carry out eccentric rotation under the drive of motor, the vibrting spear still includes two at least support piece that set up in the shell along the axial interval of shell, the eccentric rotor is including rotating the dwang that supports on two support piece and for the balancing weight of the eccentric setting of axis of dwang, wherein the one end of dwang is connected with the pivot of motor, and then relative support piece rotates under the drive of pivot. When the motor drives the eccentric rotor to rotate, because the balancing weight eccentricity of the eccentric rotor is eccentrically arranged relative to the central axis of the rotating rod, the gravity center of the eccentric rotor is not on the rotating rod, the eccentric rotor vibrates due to the uneven centrifugal force, the vibration force is transmitted to the mobile film layer on the substrate through the vibration conduction platform, and the mobile film layer flows under the action of vibration, so that the uniformity of the mobile film layer is improved.

Wherein, be provided with a plurality of storage tanks on the vibrations conduction platform, the vibrations stick is in the storage tank with can dismantling the mode and insert, and makes the motor expose the storage tank outside, and this can dismantle the mode can be threaded connection, buckle connection and hinged joint, and the storage tank can be circular barrel, also can be other shapes, and the size of storage tank and the size of vibrations stick can not be the same, all do not specifically to prescribe a limit to above.

Wherein, the quantity of storage tank is for following the length direction interval of vibrations conduction platform and set up at least two, and has inserted the vibrations stick respectively. The number of the containing grooves and the number of the vibration rods may be the same or different, and likewise, the number of the containing grooves and the number of the motors may be the same or different, and the number is not specifically limited herein.

The present application provides a method for coating a film layer on a substrate, which includes: coating a flowable film layer on a substrate; providing vibration to the substrate to make the film layer tend to be uniform under the action of vibration; and curing the film layer. By the method, the substrate film layer can be homogenized, and the uneven brightness of the display caused by the uneven substrate film layer is improved.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. An apparatus for homogenizing a substrate film, the apparatus comprising a carrier system for carrying the substrate and a vibration system for providing vibrations to the substrate;

the vibration system comprises a vibration rod, a motor and a vibration conduction platform, the vibration rod is arranged in the vibration conduction platform and generates vibration under the driving of the motor, the bearing system comprises a bearing platform for placing the substrate, and the bearing platform is supported on the vibration conduction platform;

the vibration rod comprises a shell and an eccentric rotor arranged in the shell, and the eccentric rotor is connected with a rotating shaft of the motor and driven by the motor to eccentrically rotate;

the vibrant stick further includes the edge the axial interval of shell set up in two at least support piece in the shell, eccentric rotor including rotate support in dwang on two support piece and for the balancing weight of the eccentric setting of axis of dwang, wherein the one end of dwang with the pivot of motor is connected, and then is in it is relative under the drive of pivot support piece rotates.

2. The apparatus of claim 1 wherein the motor body of the motor is fixedly connected to the housing such that the vibrator rod and the motor form an integral unit.

3. The apparatus of claim 2, wherein the vibration conduction platform is provided with a plurality of receiving slots, and the vibration rod is detachably inserted into the receiving slots such that the motor is exposed outside the receiving slots.

4. The apparatus of claim 3, wherein the number of the receiving grooves is at least two spaced apart along the length direction of the vibration conduction platform, and the vibration rods are respectively inserted therein.

5. The apparatus of claim 1, wherein the carrier system comprises a vacuum platform disposed between the carrier platform and the vibration conduction platform, the vacuum platform having a vacuum chamber disposed thereon, the carrier platform having an adsorption hole disposed therein for communicating with the vacuum chamber to adsorb the substrate on the carrier platform under the vacuum of the vacuum chamber.

6. The apparatus of claim 1, further comprising a shock mount, the shock conduction platform further supported on the shock mount.