WO2022032837A1

WO2022032837A1 - Shading adhesive curing apparatus and shading adhesive curing method

Info

Publication number: WO2022032837A1
Application number: PCT/CN2020/119930
Authority: WO
Inventors: 杜轩
Original assignee: Tcl华星光电技术有限公司
Priority date: 2020-08-12
Filing date: 2020-10-09
Publication date: 2022-02-17
Also published as: CN112024327A

Abstract

Disclosed is a shading adhesive curing apparatus, comprising at least one nozzle. The nozzle is used for coating a substrate with a shading adhesive. The adhesive curing apparatus also comprises at least one first lamp tube and at least one second lamp tube arranged adjacent to said nozzle. The first lamp tube is used to emit first light rays for pre-curing said shading adhesive. The second lamp tube is used to emit second light rays for deep-curing of said shading adhesive. The wavelength of the first light rays is 360 nm to 385 nm. The wavelength of the second light rays is 385 nm to 410 nm.

Description

Light-shielding glue curing device and light-shielding glue curing method

This application claims the priority of the Chinese patent application filed on August 12, 2020 with the application number 202010806984.8 and the invention titled "Light-shielding glue curing device and light-shielding glue curing method", the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the field of display technology, and in particular, to a light-shielding glue curing device and a light-shielding glue curing method.

Background technique

In order to position the screen, traditional TV products need to add a fixed front frame in front. Therefore, the display area will be occupied. Even if the frame is getting narrower and narrower, the fixed front frame still exists. In order to solve this problem, more and more manufacturers have begun to implement borderless TVs. After canceling the front frame, the screen is fixed by means of lamination, so that the entire screen can be displayed completely. The intuitive feeling brought to consumers is that the screen changes. Bigger, better visual experience.

Due to the cancellation of the fixed front frame, the side shading glue will be added to replace the side shading function in the process; at the same time, the side shading glue is also required to have a certain buffer protection function for the display panel. At present, the side shading glue mainly includes resin monomers, photoinitiators, colorants, and additives. In order to adapt to the different ultraviolet (UV) process conditions of customers, the photoinitiators generally include several different materials to make them in different It can be cured under ultraviolet light (UV) in all wavelengths.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a conventional light-shielding glue curing device in the prior art. As shown in FIG. 1 , a light-shielding glue curing device is used to cure light-shielding glue on a substrate 1 of a display panel. The substrate 1 includes a display area 10 and a non-display area 20 surrounding the display area 10 . The light-shielding glue curing device includes a nozzle 1 and a lamp tube 2. The non-display area 20 of the substrate 1 is coated with light-shielding glue through the nozzle 1, and all the non-display area 20 is covered by the lamp tube 2. The light-shielding glue is irradiated with UV light and cured by a single waveband. The light energy is strong, the surface curing is fast, but the penetration is weak, and there is a disadvantage of insufficient deep curing; while the UV light with a wavelength of 405nm has strong penetration and high curing depth, but the energy is weak, and the surface curing is slow, making the uncured glue. The contact time with oxygen in the air becomes longer, and the oxygen will inhibit the free radical reaction of the glue curing, resulting in insufficient surface drying of the colloid, sticky hands and other phenomena, and the surface hardness is reduced.

Aiming at the above-mentioned problems of insufficient curing depth of short-wave light or insufficient surface dryness of long-wave light, a new light-shielding glue curing device and a light-shielding glue curing method are proposed.

technical problem

The present application provides a light-shielding glue curing device and a light-shielding glue curing method. The light-shielding glue is applied to a substrate through a nozzle, and a first lamp tube is used to emit a first light to pre-cure the light-shielding glue, that is, fast curing to improve the lack of surface dryness. problem, and the second lamp tube is used to emit a second light to deeply cure the shading glue; wherein, the wavelength of the first light is 360 nm~385 nm, and the wavelength of the second light is 385 nm~410 nm. In this way, the surface and interior of the light-shielding glue are well cured.

technical solutions

In a first aspect, an embodiment of the present application provides a light-shielding glue curing device, which includes at least one nozzle, and the nozzle is used for applying light-shielding glue to a substrate, wherein the glue curing device further includes a nozzle disposed adjacent to the nozzle. at least one first lamp tube and at least one second lamp tube, the first lamp tube and the second lamp tube are arranged on the same side of the nozzle, and the second lamp tube faces the first lamp tube The direction of the side is consistent with the moving direction of the glue curing device, and the direction of the first lamp tube toward the side of the nozzle is consistent with the moving direction of the glue curing device; and the first lamp tube is used for emit a first light to pre-cure the light-shielding glue, and the second lamp tube is used to emit a second light to deeply cure the light-shielding glue; and, the wavelength of the first light is 360 nm˜385 nm, and the wavelength of the second light is 385 nm˜410 nm.

In the light-shielding glue curing device, the distance from the first lamp tube to the second lamp tube is 0.01 mm˜10 mm, and the distance from the first lamp tube to the nozzle is 0.1 mm˜50 mm.

In the shading glue curing device, the illuminance of the first lamp tube is 0-4000mw/cm², and the illuminance of the second lamp tube is 0-4000mw/cm².

In the light-shielding glue curing device, the first lamp tube and the second lamp tube are both LED ultraviolet lamps, and the length direction of the lamp tube of the LED ultraviolet lamp is perpendicular to the plane where the substrate is located; the nozzle The length direction is perpendicular to the plane where the substrate is located.

In a second aspect, an embodiment of the present application further provides a light-shielding glue curing device, including at least one nozzle, the nozzle is used to apply light-shielding glue to a substrate, and the glue curing device further includes a nozzle disposed adjacent to the nozzle. At least one first lamp tube and at least one second lamp tube, the first lamp tube is used for emitting a first light to pre-cure the light-shielding glue, and the second light tube is used for emitting a second light To make the shading glue deeply cured; the wavelength of the first light is 360 nm˜385 nm, and the wavelength of the second light is 385 nm˜410 nm.

In the light-shielding glue curing device, the first lamp tube and the second lamp tube are arranged on the same side of the nozzle, and the distance from the first lamp tube to the nozzle is smaller than that of the second lamp tube distance to the nozzle.

In the light-shielding glue curing device, the direction of the second lamp tube facing one side of the first lamp tube is consistent with the moving direction of the glue curing device, and the first lamp tube is facing the nozzle one side. The direction of the side is consistent with the moving direction of the glue curing device.

In the light-shielding glue curing device, the light-shielding glue is a light-shielding glue, and the light-shielding glue includes a resin monomer, a variety of photoinitiators, colorants and additives.

In the light-shielding glue curing device, the material of the light-shielding glue is black PET.

In a third aspect, the embodiments of the present application further provide a method for curing light-shielding glue, which adopts the above-mentioned curing device for light-shielding glue. The step of distributing the light-shielding glue mixture; while applying the light-shielding glue mixture through a nozzle, pre-curing the light-shielding glue mixture through at least one first lamp tube, and deeply curing the light-shielding glue mixture through at least one second lamp tube , to form the step of shading glue.

In the light-shielding glue curing method, in the steps of pre-curing the light-shielding glue mixture by at least one first lamp tube, and deeply curing the light-shielding glue mixture by at least one second lamp tube to form the light-shielding glue, The emission wavelength of the first lamp tube is 360nm~385 The light-shielding glue mixture is pre-cured with a first light of nm, and the light-shielding glue mixture is deeply cured by the second light tube emitting a second light having a wavelength of 385 nm˜410 nm to form a light-shielding glue.

beneficial effect

Compared with the prior art, in the light-shielding glue curing device and the light-shielding glue curing method provided by the present application, when the light-shielding glue is applied to the side frame of a substrate through a nozzle, the first lamp tube is used to emit a second light with a wavelength of 385nm-410nm. A light is used to pre-cure the light-shielding glue, so that the surface of the light-shielding glue can be quickly cured, which can improve the phenomenon of insufficient surface drying of the colloid. , so that the light-shielding glue can achieve deep curing, that is, to compensate for the phenomenon that the curing depth of the first lamp is insufficient. Thereby, the surface of the light-shielding glue and the interior of the light-shielding glue are both well cured.

Description of drawings

FIG. 1 is a schematic structural diagram of a common light-shielding glue curing device in the prior art.

FIG. 2 is a schematic structural diagram of a light-shielding glue curing device according to an embodiment of the present application.

Embodiments of the present invention

The present application provides a light-shielding glue curing device and a light-shielding glue curing method. In order to make the purpose, technical solutions and effects of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

Specifically, please refer to FIG. 2 , which is a schematic structural diagram of a light-shielding glue curing device in an embodiment of the present application. As shown in FIG. 2 , in this embodiment, a light-shielding glue curing device is provided. The light-shielding glue curing device is suitable for curing light-shielding glue on the side frame of an LED display screen or an LCD display screen, and is especially suitable for curing a display panel. When the side of a substrate 1 is coated with light-shielding glue, the light-shielding glue curing device includes at least one nozzle 2 , at least one first lamp tube 3 and at least one second lamp tube 4 . Wherein, in this application, the substrate 1 includes a display area 10 and a non-display area 20 , and the light shielding glue is disposed on the non-display area 20 of the substrate 1 .

2 , in a specific embodiment of the present application, the light-shielding glue curing device includes a nozzle 2 , a first lamp tube 3 and a second lamp tube 4 . The length direction of the nozzle 2 is perpendicular to the plane where the substrate 1 is located, and the nozzle 2 is used for applying light-shielding glue to the substrate 1 . In this application, the light-shielding glue is an opaque tape, that is, the light-shielding glue is a kind of light-shielding material. The side frame of the display screen realizes the adhesive material that wraps and shields the light source to block the penetration of the light source. The light-shielding adhesive has the advantages of excellent shielding, excellent insulation, good scratch resistance, anti-fingerprint, matte treatment, and beautiful appearance.

As a preferred embodiment, the shading glue is preferably black and white glue, wherein the black and white glue is a kind of shading tape, and the black and white glue is mainly used for sticking and shading. The material of the black and white glue is It is PET, and further, the light-shielding glue is preferably black PET.

2, the first lamp tube 3 and the second lamp tube 4 are arranged adjacent to the nozzle 2, and the first lamp tube 3 and the second lamp tube 4 are both arranged in the The same side of the nozzle 2, as well as the first lamp tube 3 and the second lamp tube 4 are all LED ultraviolet lamps, and the length direction of the lamp tube of the first lamp tube 3 and the second lamp tube 4 is the same. perpendicular to the plane where the substrate 1 is located. Wherein, the distance from the first lamp tube 3 to the nozzle 2 is smaller than the distance from the second lamp tube 4 to the nozzle 2 .

In this embodiment, the direction of the second lamp tube 4 toward the side of the first lamp tube 3 is consistent with the moving direction of the glue curing device, and the first lamp tube 3 is facing the nozzle 2 . The direction of the side is consistent with the moving direction of the glue curing device.

It should be noted that when the nozzle 2 coats the light-shielding glue on the substrate 1, the first lamp tube 3 is used to emit a first light to pre-cure the light-shielding glue; and, The second light tube 4 is used for emitting a second light to deeply cure the light-shielding glue, that is, while the first light tube 3 pre-cures the light-shielding glue, the second light tube 4 further solidifies the light-shielding glue. The pre-cured light-shielding glue is deeply cured.

As the most preferred embodiment, the wavelength of the first light is 360 nm˜385 nm, and the wavelength of the second light is 385 nm˜410 nm. The first light and the second light are both ultraviolet light.

As the most preferred embodiment, the distance from the first lamp tube 3 to the second lamp tube 4 is 0.01 mm˜10 mm, and the distance from the first lamp tube 3 to the nozzle 2 is 0.1 mm˜50 mm.

As a preferred embodiment, the illuminance of the first lamp tube 3 is 0-4000mw/cm², and the illuminance of the second lamp tube 4 is 0-4000mw/cm².

Further, as the most preferred embodiment, when the wavelength of the first light is 365 nm and the wavelength of the second light is 405 nm, it is equivalent to that the second lamp 4 is a long-wavelength LED lamp, The dominant wavelength is 405 nm, and the first lamp tube 3 is a short-wavelength LED lamp with a dominant wavelength of 365 nm. In the moving direction of the light-shielding glue curing device, the first lamp tube 3 is located in front of the second lamp tube 4, The first light with a wavelength of 365nm emitted by the first lamp tube 3, namely ultraviolet light, can quickly cure the surface and improve the phenomenon of insufficient surface dryness of the colloid. The second light tube 4 emits a second light with a wavelength of 405nm, namely ultraviolet light. The light is also used to supplement deep curing, that is, to compensate the insufficient curing depth of the first lamp tube 3, so as to solve the problem of insufficient curing depth of short-wave light or insufficient surface dryness of long-wave light without increasing the process time.

It should be noted that, in the light-shielding glue curing device described in this application, during the coating and curing process of the light-shielding glue, that is, the light-shielding glue, in addition to controlling the first light emitted by the first lamp 3 and the In addition to the factor parameters of the wavelength of the second light emitted by the second lamp 4, it is also necessary to maintain the viscosity of the light-shielding glue, that is, the viscosity of the light-shielding glue, the temperature of the nozzle 2, the coating speed of the nozzle 2, the Factors such as the discharge volume of the nozzle 2 and the distance from the nozzle 2 to the substrate 1 are used to achieve good diffusion of the light-shielding glue, thereby achieving rapid curing and deep curing.

Furthermore, the number of the nozzles 2 includes, but is not limited to, one of the above embodiments. In other preferred embodiments, the number of the nozzles 2 can also be set to two, and the two nozzles 2 are arranged side by side on the same side of the substrate 1, and both the nozzles 2 are arranged on the same side of the substrate 1. On the same side of the first lamp tube 3 and the second lamp tube 4, the length directions of the two nozzles 2 are both perpendicular to the plane of the substrate 1, and the two nozzles 2 are respectively used for the substrate 1 Apply shading glue.

For example, in an embodiment, as shown in FIG. 2 , the nozzle 2 includes a first nozzle 21 and a second nozzle 22 , and the direction of the first nozzle 21 toward the side of the second nozzle 22 is the same as that of the second nozzle 22 . The moving direction of the light-shielding glue curing device is consistent, and the direction of the first lamp tube 3 toward the first nozzle 21 is consistent with the moving direction of the glue curing device. The minimum hole diameter is larger than the maximum hole diameter of the second nozzle 22 . In this embodiment, by adjusting the temperature of the second nozzle 22, the temperature of the light-shielding glue sprayed by the second nozzle 22 is lowered, so that the light-shielding glue is rapidly diffused and cured, and the first nozzle 21 is close to The second nozzle 22 is coated to ensure that the colloid coated by the second nozzle 22 does not overflow outward, to prevent the problem of light leakage and white lines during the curing process, and to achieve good diffusion of the light-shielding glue.

As a preferred embodiment, the display panel that needs to be coated with light-shielding glue and cured of the light-shielding glue is a relatively conventional structure known to those skilled in the art. As a preferred embodiment, the material of the substrate 1 of the display panel is generally selected from polyimide (PI).

Based on the above-mentioned light-shielding glue curing device, the present application also provides a light-shielding glue curing method correspondingly, using the above-mentioned light-shielding glue curing device, and the light-shielding glue curing method includes:

Step S01: providing a light-shielding glue mixture, and applying the light-shielding glue mixture on the non-display area 20 of a substrate 1 through at least one nozzle 2.

In this step, the light-shielding glue mixture is coated on the non-display area 20 of a substrate 1 through a nozzle 2, and the light-shielding glue mixture includes a light-shielding glue material, and the light-shielding glue material is known in the art. For conventional raw materials for forming light-shielding glue, such as but not limited to UV-cured light-shielding glue raw materials or heat-cured light-shielding glue raw materials, the light-shielding glue raw materials in this embodiment are selected from UV-cured light-shielding glue raw materials. The raw materials of the light-shielding glue include resin monomers, various photoinitiators, colorants and additives, but are not limited thereto.

Step S02: while applying the light-shielding glue mixture through the nozzle 2, the light-shielding glue mixture is pre-cured by at least one first lamp tube 3, and the light-shielding glue mixture is deeply cured by at least one second lamp tube 4 to form Steps for shading glue.

In this embodiment, since the photoinitiator in step S01 generally includes several different materials, different photoinitiators can achieve curing of the glue material under the irradiation of ultraviolet light in different wavelength bands. Therefore, in this step , while applying the light-shielding glue mixture to the side frame of the substrate 1 through the nozzle 2, the first light tube 3 can be used to emit a first light with a wavelength of 360 nm to 385 nm to pre-cure the light-shielding glue mixture, and then use the second lamp 4 to emit a second light 4 with a wavelength of 385 nm to 410 nm to deeply cure the light-shielding glue mixture to form a light-shielding glue.

As the most preferred embodiment, in this step, that is, step S02, the first light tube 3 is used to emit first light with a wavelength of 365 nm and the light-shielding glue mixture coated on the substrate 1 is irradiated, and then The second lamp tube 4 emits a second light with a wavelength of 405 nm and irradiates the light-shielding glue mixture pre-cured by the first light to form a light-shielding glue. Using the first lamp tube 3 to pre-cure the shading glue mixture so that the surface of the shading glue can be quickly cured can improve the phenomenon of insufficient surface dryness of the colloid, and at the same time, using the second lamp tube 4 to cure deeply can compensate for the first lamp tube 3. The phenomenon of insufficient curing depth, so as to achieve a good effect of curing both the surface and the interior of the shading glue.

According to the above-mentioned curing method of the light-shielding glue, after curing to form the light-shielding glue, the light-shielding glue plays a role of supporting and protecting the display panel.

For the specific implementation of the above operations, reference may be made to the foregoing embodiments, and details are not described herein again.

To sum up, in the light-shielding glue curing device and the light-shielding glue curing method provided by the present application, while applying the light-shielding glue to the side frame of a substrate 1 through the nozzle 2, the first lamp tube 3 is used to emit a wavelength of 385 nm. The first light of ~410nm is used to pre-cure the light-shielding glue, so that the surface of the light-shielding glue can be quickly cured, which can improve the phenomenon of insufficient surface dryness of the glue. The pre-cured colloid enables the light-shielding glue to achieve deep curing, that is, to compensate for the phenomenon of insufficient curing depth of the first lamp tube 3 . Thereby, the surface of the light-shielding glue and the interior of the light-shielding glue are both well cured.

It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions and inventive concepts of the present application, and all these changes or replacements should belong to the protection scope of the appended claims of the present application.

Claims

A light-shielding glue curing device, comprising at least one nozzle used for applying light-shielding glue to a substrate, wherein the glue curing device further comprises at least one first lamp tube and at least one light tube disposed adjacent to the nozzle. A second lamp tube, the first lamp tube and the second lamp tube are arranged on the same side of the nozzle, and the direction of the second lamp tube facing the side of the first lamp tube is the same as that of the glue curing device The moving direction of the first lamp tube is consistent with the moving direction of the first lamp tube toward the side of the nozzle and the moving direction of the glue curing device; and the first lamp tube is used to emit a first light to make the The light-shielding glue is pre-cured, and the second lamp tube is used to emit a second light to deeply cure the light-shielding glue; and the wavelength of the first light is 360 nm to 385 nm, and the second light is The wavelength is 385nm~410nm.
The light-shielding glue curing device according to claim 1, wherein the distance from the first lamp tube to the second lamp tube is 0.01 mm˜10 mm, and the distance from the first lamp tube to the nozzle is 0.1 mm~50mm.
The shading glue curing device according to claim 2, wherein the illuminance of the first lamp tube is 0-4000mw/cm², and the illuminance of the second lamp tube is 0-4000mw/cm².
The light-shielding glue curing device according to claim 3, wherein the first lamp tube and the second lamp tube are both LED ultraviolet lamps, and the length direction of the lamp tubes of the LED ultraviolet lamp is perpendicular to the plane where the substrate is located ; The length direction of the nozzle is perpendicular to the plane where the substrate is located.
A light-shielding glue curing device, comprising at least one nozzle used for applying light-shielding glue to a substrate, wherein the glue curing device further comprises at least one first lamp tube and at least one light tube disposed adjacent to the nozzle. a second light tube, the first light tube is used for emitting a first light to pre-cure the light-shielding glue, and the second light tube is used for emitting a second light to deeply cure the light-shielding glue ; The wavelength of the first light is 360 nm to 385 nm, and the wavelength of the second light is 385 nm to 410 nm.
The shading glue curing device according to claim 5, wherein the first lamp tube and the second lamp tube are arranged on the same side of the nozzle, and the distance from the first lamp tube to the nozzle is smaller than the distance between the first lamp tube and the nozzle. The distance from the second lamp tube to the nozzle.
The light-shielding glue curing device according to claim 6, wherein the direction of the second lamp tube toward one side of the first lamp tube is consistent with the moving direction of the glue curing device, and the first lamp tube is facing The direction of one side of the nozzle is consistent with the moving direction of the glue curing device.
The light-shielding glue curing device according to claim 7, wherein the distance from the first lamp tube to the second lamp tube is 0.01 mm˜10 mm, and the distance from the first lamp tube to the nozzle is 0.1 mm~50mm.
The shading glue curing device according to claim 8, wherein the illuminance of the first lamp tube is 0-4000mw/cm², and the illuminance of the second lamp tube is 0-4000mw/cm².
The light-shielding glue curing device according to claim 9, wherein the first lamp tube and the second lamp tube are both LED ultraviolet lamps, and the length direction of the lamp tubes of the LED ultraviolet lamp is perpendicular to the plane where the substrate is located ; The length direction of the nozzle is perpendicular to the plane where the substrate is located.
The light-shielding glue curing device according to claim 10, wherein the light-shielding glue comprises a resin monomer, multiple photoinitiators, colorants and additives.
The light-shielding glue curing device according to claim 11, wherein the material of the light-shielding glue is black PET.
A light-shielding glue curing method, using the light-shielding glue curing device as claimed in claim 5, wherein the light-shielding glue curing method comprises:

providing a light-shielding glue mixture, and coating the light-shielding glue mixture on a substrate through at least one nozzle;

While applying the shading glue mixture through the nozzle, after pre-curing the shading glue mixture by at least one first lamp tube, and deeply curing the shading glue mixture through at least one second lamp tube, the step of forming the shading glue.
The method for curing light-shielding glue according to claim 13, wherein the light-shielding glue mixture is pre-cured by at least one first light tube, and the light-shielding glue mixture is deeply cured by at least one second light tube to form light-shielding glue In the step, the first light tube emits a first light with a wavelength of 360 nm to 385 nm to pre-cure the light-shielding glue mixture, and the second light tube emits a second light with a wavelength of 385 nm to 410 nm for deep curing. The shading glue mixture is described to form a shading glue.