阅读说明：本技术 一种显示面板制作方法、拼接屏制作方法及显示装置 (Display panel manufacturing method, spliced screen manufacturing method and display device ) 是由 李林霜 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种显示面板制作方法、拼接屏制作方法及显示装置,涉及显示装置制作技术领域,本发明所提供的显示面板制作方法、拼接屏制作方法及显示装置,主要对背板、盖板之间的封装工序作出改进,在本发明所提供的实施例中,背板和盖板在进行封装时,首先于两者之间设置支撑墙,使得支撑墙配合背板、盖板一并围合出收容发光器件的待灌注腔,再进行封装胶灌注。其中,由于背板和盖板之间受到了支撑墙的支撑作用,所以固化后形成于待灌注腔当中的封装胶能够维持在一个较为稳定的膜层厚度,减少了显示面板当中封装胶膜层厚度误差,进而减少了不同待拼接显示面板中封装胶膜层厚度差异,提升了封装胶膜层厚度的均一性。(The invention discloses a display panel manufacturing method, a spliced screen manufacturing method and a display device, and relates to the technical field of display device manufacturing. Because the back plate and the cover plate are supported by the support wall, the packaging adhesive formed in the cavity to be filled after curing can be maintained at a stable film thickness, the thickness error of the packaging adhesive film layer in the display panel is reduced, the thickness difference of the packaging adhesive film layers in different display panels to be spliced is reduced, and the uniformity of the thickness of the packaging adhesive film layers is improved.)

1. A method for manufacturing a display panel is characterized by comprising the following steps:

providing a back plate, wherein one surface of the back plate is provided with a light-emitting device;

providing a cover plate opposite to the back plate, and arranging a support wall between the back plate and the cover plate so that the support wall, the back plate and the cover plate enclose a cavity to be filled for accommodating the light-emitting device;

and pouring packaging glue into the cavity to be poured and curing the packaging glue to form the display panel.

2. The method for manufacturing a display panel according to claim 1, wherein providing a cover plate opposite to the back plate, and disposing a support wall between the back plate and the cover plate so that the support wall, the back plate and the cover plate enclose a cavity to be filled for accommodating the light emitting device comprises:

providing a cover plate, and arranging a support wall on one side of the cover plate;

the side, provided with the support wall, of the cover plate and the side, provided with the light-emitting device, of the back plate are opposite to each other;

and enabling the support wall to be in contact with one surface of the back plate, which is provided with the light-emitting device, and enabling the cover plate and the back plate to keep a preset distance under the support of the support wall, so that the support wall, the back plate and the cover plate enclose a cavity to be filled for accommodating the light-emitting device.

3. The method for manufacturing a display panel according to claim 2, wherein one surface of the back plate has a display region and a non-display region surrounding the display region, and the light emitting device is disposed on the display region;

wherein, make the knee wall with the backplate is equipped with the one side contact of luminescent device, include:

the support wall is in contact with the side of the back plate provided with the light-emitting device, and the projection of the support wall on the back plate is covered by the non-display area.

4. The method for manufacturing a display panel according to claim 2, wherein the support wall includes a substrate and a filler filled in the substrate.

5. The display panel manufacturing method according to claim 4, wherein a hardness of the filler texture is configured to be larger than a hardness of the base texture.

6. The method for manufacturing a display panel according to claim 4, wherein the filler is a sphere, and a sphere diameter of the filler is 0.4 to 0.6 times the predetermined distance.

7. The method according to claim 4, wherein the substrate is made of epoxy resin, methyl methacrylate or silica gel, and the filler is made of SiO₂Or alumina.

8. The method for manufacturing a display panel according to claim 1, wherein a cross section of the support wall in a direction perpendicular to the cover plate has a shape in which a width thereof gradually decreases from a side close to the cover plate to a side away from the cover plate.

9. The method for manufacturing a display panel according to claim 1, wherein providing a back plate having a light emitting device disposed on one surface thereof comprises:

providing a substrate, wherein the substrate is provided with a first surface;

disposing a thin-film transistor layer on the first side to form a backplane;

and arranging a light-emitting device on one surface of the thin film transistor layer, which is back to the first surface.

10. The method for manufacturing a display panel according to claim 9, wherein the light emitting device is a MiniLED chip or a micro led chip.

11. A method for manufacturing a tiled screen, comprising the method for manufacturing a display panel according to any one of claims 1 to 10, further comprising the steps of:

after the display panel is formed, removing the support wall to form a frameless display panel;

and splicing a plurality of frameless display panels to form a spliced screen.

12. A display device, wherein the display device is manufactured by the method for manufacturing a display panel according to any one of claims 1 to 10, or by the method for manufacturing a tiled display according to claim 11.

Technical Field

The invention relates to the technical field of display device manufacturing, in particular to a display panel manufacturing method and a display device.

Background

MiniLED or micro led display technologies have lower power consumption, faster response time, and higher image resolution and color gamut than OLED and LCD display technologies in the traditional manner.

However, the size of the MiniLED or micro led display panel is limited, and the current large-sized MiniLED or micro led display device is mainly formed by splicing a plurality of display panels. In the prior art, a MiniLED or micro led display panel mainly implements encapsulation of a light emitting device by an encapsulation adhesive and a glass cover plate. Wherein, the encapsulation is glued directly to be formed on the backplate, and encapsulation adhesive film layer thickness is difficult to control, and this rete thickness that leads to encapsulation to glue among the different display panel often has the difference, and simultaneously, the encapsulation is glued not enough to the support nature of apron, also can further enlarge each display panel thickness difference, and then has influenced concatenation screen, display device's display effect.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided are a display panel manufacturing method, a spliced screen manufacturing method and a display device, which can reduce thickness errors of an encapsulation adhesive film layer.

The technical scheme adopted by the invention for solving the technical problems is as follows:

in a first aspect, the present invention provides a method for manufacturing a display panel, including the steps of:

providing a back plate, wherein one surface of the back plate is provided with a light-emitting device;

providing a cover plate opposite to the back plate, and arranging a support wall between the back plate and the cover plate so that the support wall, the back plate and the cover plate enclose a cavity to be filled for accommodating the light-emitting device;

and pouring packaging glue into the cavity to be poured and curing the packaging glue to form the display panel.

In some embodiments of the present application, providing a cover plate opposite to the back plate, and disposing a support wall between the back plate and the cover plate, so that the support wall, the back plate and the cover plate enclose a cavity to be filled for accommodating the light emitting device, includes:

providing a cover plate, and arranging a support wall on one side of the cover plate;

the side, provided with the support wall, of the cover plate and the side, provided with the light-emitting device, of the back plate are opposite to each other;

and enabling the support wall to be in contact with one surface of the back plate, which is provided with the light-emitting device, and enabling the cover plate and the back plate to keep a preset distance under the support of the support wall, so that the support wall, the back plate and the cover plate enclose a cavity to be filled for accommodating the light-emitting device.

In some embodiments of the present application, one side of the back plate has a display area and a non-display area surrounding the display area, and the light emitting device is disposed on the display area;

wherein, make the knee wall with the backplate is equipped with the one side contact of luminescent device, include:

the support wall is in contact with the side of the back plate provided with the light-emitting device, and the projection of the support wall on the back plate is covered by the non-display area.

In some embodiments of the present application, the support wall includes a base and a filler filled in the base.

In some embodiments of the present application, the hardness of the filling texture is configured to be greater than the hardness of the base texture.

In some embodiments of the present application, the filler is a sphere, and the sphere diameter of the filler is 0.4 to 0.6 times the preset distance.

In some embodiments of the present disclosure, the substrate is made of epoxy resin, methyl methacrylate, or silica gel, and the filler is made of SiO₂Or alumina.

In some embodiments of the present application, a cross section of the support wall in a direction perpendicular to the cover plate has a shape in which a width gradually decreases from a side close to the cover plate to a side far from the cover plate.

In some embodiments of the present application, providing a back plate, where a light emitting device is disposed on one side of the back plate, includes:

providing a substrate, wherein the substrate is provided with a first surface;

disposing a thin-film transistor layer on the first side to form a backplane;

and arranging a light-emitting device on one surface of the thin film transistor layer, which is back to the first surface.

In some embodiments of the present application, the light emitting device is a MiniLED chip or a micro led chip.

In a second aspect, the present application further provides a method for manufacturing a tiled display, including the method for manufacturing a display panel of the first aspect, further including the steps of:

after the display panel is formed, removing the support wall to form a frameless display panel;

and splicing a plurality of frameless display panels to form a spliced screen.

In a third aspect, the present application further provides a display device, where the display device is manufactured by the display panel manufacturing method according to the first aspect, or by the splicing screen manufacturing method according to the second aspect.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

the invention discloses a display panel manufacturing method, a spliced screen manufacturing method and a display device, and relates to the technical field of display device manufacturing. Because the back plate and the cover plate are supported by the support wall, the packaging adhesive formed in the cavity to be filled after curing can be maintained at a stable film thickness, the thickness error of the packaging adhesive film layer in the display panel is reduced, the thickness difference of the packaging adhesive film layers in different display panels to be spliced is reduced, and the uniformity of the thickness of the packaging adhesive film layers is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic flow chart illustrating a method for manufacturing a display panel according to embodiment 1 of the present invention;

fig. 2 is a schematic diagram of step S2 in embodiment 1 of the present invention;

fig. 3 is a schematic diagram of step S3 in embodiment 1 of the present invention;

fig. 4 and 5 are schematic diagrams of step S201 in embodiment 2 of the present invention;

fig. 6 is a schematic diagram of step S203 in embodiment 2 of the present invention;

fig. 7 is a schematic diagram of step S101 in embodiment 2 of the present invention;

fig. 8 is a schematic diagram of step S102 in embodiment 2 of the present invention;

fig. 9 is a schematic diagram of step S103 in embodiment 2 of the present invention;

fig. 10 is a schematic diagram of step S4 in embodiment 3 of the present invention;

fig. 11 is a schematic diagram of step S5 in embodiment 3 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

Embodiment 1 provides a method for manufacturing a display panel, please refer to fig. 1, which is a schematic flow chart of the method for manufacturing a display panel according to the embodiment, in which the method for manufacturing a display panel includes the steps of:

and S1, providing a back plate 1, wherein one surface of the back plate 1 is provided with a light-emitting device 2.

S2, providing a cover plate 3 opposite to the back plate 1, and disposing a support wall 4 between the back plate 1 and the cover plate 3, such that the support wall 4, the back plate 1 and the cover plate 3 enclose a cavity 5 to be filled for accommodating the light emitting device 2.

And S3, pouring the packaging adhesive 6 into the cavity to be poured 5 and curing the packaging adhesive 6 to form the display panel.

Referring to fig. 2 and 3, in the method for manufacturing a display panel according to this embodiment, in step S2, a support wall 4 is disposed between a back plate 1 and a cover plate 3 that are disposed opposite to each other, the support wall 4 supports the back plate 1 and the cover plate 3 respectively by using its own support property, and at the same time, the back plate 1 and the cover plate 3 together enclose a cavity to be filled 5 for accommodating the light emitting device 2, and then, an encapsulation adhesive 6 is filled into the cavity to be filled 5, so that the encapsulation adhesive 6 is cured to cover the light emitting device 2, thereby completing an encapsulation process for the display panel.

The display panel manufacturing method provided by the embodiment mainly realizes the packaging of the display panel by arranging the support wall 4 with certain support performance, the support performance of the support wall 4 can effectively ensure that the distance between the back plate 1 and the cover plate 3 is within an expected range, the error range of the film thickness of the packaging adhesive 6 in the finally formed display panel is ensured, further, the thickness difference of the packaging adhesive film layers in different display panels to be spliced is reduced, the uniformity of the thickness of the packaging adhesive film layers is improved, and the display effect of the display panel formed by splicing the display panels is finally improved.

It should be noted that the display panel manufacturing method provided in the foregoing can be applied to reduce the error range of the thickness of the encapsulating adhesive 6 film in the display panel, so that the thickness uniformity of the encapsulating adhesive 6 film in each display panel to be spliced of the splicing screen can be improved. It is understood that the above-mentioned display panel manufacturing method is not limited to manufacturing the display panels to be spliced, and can also be used for manufacturing independent display panels.

This embodiment also provides an example 2, and the main difference between the example 2 and the example 1 is that the step S2 is detailed in the example 2.

Referring to fig. 4, 5 and 6, in embodiment 2, in step S2, providing a cover plate 3 opposite to the back plate 1, and disposing a support wall 4 between the back plate 1 and the cover plate 3, so that the support wall 4, the back plate 1 and the cover plate 3 enclose a cavity to be filled 5 for accommodating the light emitting device 2, includes:

s201, providing a cover plate 3, and arranging a support wall 4 on one side of the cover plate 3;

s202, enabling the surface, provided with the support wall 4, of the cover plate 3 and the surface, provided with the light-emitting device 2, of the back plate 1 to be opposite to each other;

s203, contacting the support wall 4 with the surface of the back plate 1 having the light emitting device 2, and keeping a predetermined distance between the cover plate 3 and the back plate 1 supported by the support wall 4, so that the support wall 4, the back plate 1 and the cover plate 3 enclose a cavity 5 to be filled for accommodating the light emitting device 2.

In other embodiments, regarding step S201, the support walls 4 are first formed on the back plate 1, and then the support walls 4 are contacted with the cover plate 3 by changing the relative orientation between the back plate 1 and the cover plate 3.

In the present embodiment, the supporting wall 4 is directly formed on the cover plate 3 in step S201, and by adopting such an arrangement, the process of forming the supporting wall 4 on the cover plate 3 and the process of manufacturing the back plate 1 can be performed together, thereby increasing the production efficiency.

In step S202, in this embodiment, the back plate 1 is turned over after the light emitting device 2 is disposed, so that the side thereof on which the light emitting device 2 is disposed faces the cover plate 3 located below, in step S202, the implementer may also dispose the back plate 1 below and the cover plate 3 above, which is not limited in this disclosure.

In step S203, the predetermined distance refers to a stable distance that the back plate 1 and the cover plate 3 can maintain after the supporting walls 4 are respectively contacted with the back plate 1 and the cover plate 3. After the preset space and the supporting wall 4 are respectively contacted with the back plate 1 and the cover plate 3, the size of the supporting wall 4 in the direction from the back plate 1 to the cover plate 3 is consistent, and the preset space is also consistent with the thickness of a film layer formed by finally curing the packaging adhesive 6.

Note that the rear plate 1 has a display area and a non-display area surrounding the display area, and the light emitting device 2 is disposed in the display area to serve as a display member. In the above steps, the contact portion between the support wall 4 and the back plate 1 may be located in the display area as long as the support wall 4 can accommodate the light emitting device 2. In the embodiment, the projection of the support wall 4 on the back plate 1 is covered by the non-display area, so as to prevent the support wall 4 from contacting the display area of the back plate 1, expand the filling range of the packaging adhesive 6 as much as possible, and avoid affecting the display of the display panel.

It will be understood that the supporting wall 4 is in the form of an inner bore, the inner bore wall of the supporting wall 4 enclosing a portion of the cavity 5 to be filled. The specific shape of the support wall 4 can be set correspondingly according to the display area of the display panel. For example, in the present embodiment, the display area of the display panel is rectangular, and the support wall 4 is correspondingly shaped like a square with a square inner hole. In another embodiment, the display area of the display panel is circular, and the support wall 4 is correspondingly circular with an inner hole.

In addition, for the support wall 4, the support performance of the support wall 4 itself determines the thickness of the encapsulating adhesive 6 between the back plate 1 and the cover plate 3, and the support wall 4 can be made of resin only as shown in embodiment 1. However, resin is adopted as the support wall 4 alone, and the support performance of the support wall 4 is limited, so that it is difficult to ensure that the back plate 1 and the cover plate 3 can be stably maintained at a preset distance. Therefore, in order to improve the supporting performance of the supporting wall 4, in this embodiment, the supporting wall 4 includes a substrate and a filler filled in the substrate, wherein the filler can fill a gap in the substrate caused by the process and the structure of the supporting wall, so as to effectively improve the supporting performance of the supporting wall 4, so that the back plate 1 and the cover plate 3 can be stably kept at a preset distance, and further, the thickness of the film layer of the packaging adhesive 6 formed between the back plate 1 and the cover plate 3 is further ensured.

In addition, as shown in this embodiment, the hardness of the filler is configured to be greater than that of the base, so as to further improve the supporting effect of the supporting wall 4. In this embodiment, the substrate is made of epoxy resin, and the filler is SiO₂The substrate and the filler can be made of materials selected by the practitioner according to their needs, for example, in another embodiment, the substrate is made of methyl methacrylate, and the filler is alumina particles. The implementer may also choose silica gel or other materials to construct the substrate, and use other metal particles or non-metal particles as the filler.

The filler may have a shape such as irregular particles, square particles, or polyhedral particles. In this embodiment, to further improve the supporting effect of the filler on the substrate, the filler is a sphere, and the sphere diameter of the filler is 0.4 to 0.6 times of the predetermined interval, preferably half of the predetermined interval.

It should be noted that, the implementer may correspondingly select the shape of the support wall 4 according to his own requirements. For example, after the support walls 4 are provided on the cover plate 3, the cross section of the support walls 4 in the direction perpendicular to the cover plate 3 may be any one of a rectangle, a circle, a triangle, a trapezoid, a T-shape, or a combination of several kinds.

In the embodiment, referring to fig. 5, after the support wall 4 is disposed on one side of the cover plate 3, the cross section of the support wall 4 in the direction perpendicular to the cover plate 3 is gradually reduced in width from the side close to the cover plate 3 to the side far from the cover plate 3, and it can be understood that the support wall 4 with such a cross section is more excellent in support performance than the support wall 4 with a circular cross section. In the present embodiment, the cross-section is specifically trapezoidal, the longer side of the trapezoid is connected to the cover plate 3, and the shorter side of the trapezoid faces away from the cover plate 3. It will be further understood that the above-mentioned width refers to the dimension of the support wall 4 in the direction parallel to the cover plate 3.

Referring to fig. 7, fig. 8 and fig. 9, an implementer may further refine step S1, for example, in this embodiment, step S1 provides a back plate 1, and one surface of the back plate 1 is provided with a light emitting device 2, including:

s101, providing a substrate 11, wherein the substrate 11 is provided with a first surface 11 a;

s102, arranging a thin film transistor layer 12 on the first surface 11a to form a back plate 1;

and S103, arranging the light-emitting device 2 on the surface of the thin-film transistor layer 12 opposite to the first surface 11 a.

The light emitting device 2 may be a MiniLED chip or a micro led chip, and the micro led chip is taken as an example in the present embodiment, but should not be construed as a limitation to the light emitting device 2. Some technical means for transferring the MiniLED chip or the micro led chip on the thin-film transistor layer 12 in a large amount have been disclosed in the prior art, and thus will not be described in detail herein. In addition, the size of the MiniLED chip in the direction from the back plate 1 to the cover plate 3, namely the thickness of the MiniLED chip, can be selected to be 100 ± 15um, the size of the micro led chip in the direction from the back plate 1 to the cover plate 3, namely the thickness of the micro led chip, can be selected to be 8 ± 3um, in order to ensure the supporting effect of the supporting wall 4, the height of the supporting wall 4, namely under the support of the supporting wall 4, the preset distance which can be kept by the back plate 1 and the cover plate 3 can be 1.5 to 2 times of the thickness of the MiniLED chip or the micro led chip. In addition, in the embodiment, the thin-film transistor layer 12 is preferably of a top-gate structure, but may have any structure such as a bottom-gate structure, and the active layer in the thin-film transistor layer 12 may be a high-mobility metal oxide semiconductor such as IGZO, IGTO, and IGZTO, and may be selected by an implementer according to his or her needs.

Regarding step S3, in the present embodiment, after the cavity 5 to be filled is filled with the encapsulation adhesive 6, the encapsulation adhesive 6 needs to be cured to complete the encapsulation process of the display panel. In the present embodiment, the encapsulation adhesive 6 is cured by UV light, and the implementer may also use thermal curing or a process combining UV light curing and thermal curing, which is not particularly limited in the present disclosure.

It should be noted that the packaging adhesive 6 may be selected from a silicon adhesive or an epoxy adhesive, and the light transmittance thereof should be greater than 95% and the viscosity thereof should be less than 1000cp, so as to ensure the display effect and the packaging effect of the display panel.

The specific implementation also provides a method for manufacturing the spliced screen as embodiment 3.

Referring to fig. 10 and fig. 11, a method for manufacturing a tiled display screen according to this embodiment includes the method for manufacturing a display panel according to embodiment 1, and further includes the steps of:

s4, after forming the display panel, removing the support wall 4 to form the frameless display panel 7;

and S5, splicing the plurality of frameless display panels 7 to form a spliced screen.

The method for manufacturing the tiled display screen provided by the embodiment is mainly used for removing and processing the supporting wall 4 after the display panel is formed, so that the frameless display panel is obtained. After obtaining the plurality of frameless display panels 7, the plurality of frameless display panels 7 can be laid flat and aligned and spliced, so as to obtain a spliced screen.

Regarding the removal process of the support wall 4, an implementer may use a cutting method to separate the support wall 4 from the cured encapsulation adhesive 6, and the implementer may select other removal processes according to the specific material of the support wall 4, which is not particularly limited in the present disclosure.

In addition, the method for manufacturing the tiled screen provided in this embodiment is not limited to the assembly of two frameless display panels 7 shown in this embodiment, and may also be used for the assembly of a plurality of frameless display panels 7, for example, the assembly of 3, 4, and other frameless display panels 7. Some splicing methods for the frameless display panels 7 have been disclosed in the prior art, and in this embodiment, the splicing methods for the frameless display panels 7 are not described repeatedly, and the implementer may correspondingly select the splicing methods according to the requirements of the implementer.

The present embodiment further provides a display device, wherein the display device is manufactured by using the display panel manufacturing method provided in embodiment 1 or embodiment 2, or by using the tiled display manufacturing method provided in embodiment 3. The display device includes, but is not limited to, a mobile phone, a tablet computer, a computer monitor, a game machine, a television, a wearable device, and other life appliances or household appliances with display functions.

According to the display panel manufacturing method, the spliced screen manufacturing method and the display device, the back plate 1 and the cover plate 3 are respectively supported mainly through the support wall 4, the support performance of the support wall 4 is optimized and improved, the film thickness of the packaging glue 6 is guaranteed to be within an expected range during packaging, the film thickness uniformity of the packaging glue 6 in each display panel to be spliced is further improved, and the display effect of the spliced screen and the display device is guaranteed.

The display panel and the method for manufacturing the same provided by the present invention are described in detail above. It should be understood that the exemplary embodiments herein should be considered merely as illustrative, for facilitating the understanding of the method of the present invention and its core ideas, and not as limiting the present invention. Descriptions of features or aspects in each exemplary embodiment should generally be considered as applicable to similar features or aspects in other exemplary embodiments. While the present invention has been described with reference to exemplary embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present invention cover the modifications and variations of this invention provided they come within the spirit and scope of the appended claims and their equivalents and improvements made thereto.