CN108269500B - Display panel and manufacturing method thereof - Google Patents
Display panel and manufacturing method thereof Download PDFInfo
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- CN108269500B CN108269500B CN201810055144.5A CN201810055144A CN108269500B CN 108269500 B CN108269500 B CN 108269500B CN 201810055144 A CN201810055144 A CN 201810055144A CN 108269500 B CN108269500 B CN 108269500B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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Abstract
The invention provides a display panel and a manufacturing method thereof. The display panel manufactured by the manufacturing method comprises a light-emitting component, a covering plate positioned above the light-emitting component, a polarizer positioned between the light-emitting component and the covering plate, a light shielding layer formed at the edge of the covering plate and an adhesion layer positioned between the polarizer and the covering plate, and is characterized in that the adhesion layer comprises a leakage-proof region positioned below the light shielding layer, and the refractive index of the leakage-proof region is greater than a certain threshold value so as to refract light reflected by the edge of the display panel to the light shielding layer. Compared with the prior art, the display panel manufactured by the manufacturing method of the display panel has the advantages that the refractive index of the leakage-proof area is larger than a certain threshold value, so that light emitted to the leakage-proof area is refracted to the light shielding layer, and the light leakage phenomenon at the edge of the display panel can be effectively prevented.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display panel and a manufacturing method thereof.
Background
With the development of display technology, various display panels are applied to various electronic devices such as mobile phones, watches, and tablet computers.
As shown in fig. 1, the conventional display panel generally includes: a light emitting component 100 ' and a transparent cover plate 200 ' positioned over the light emitting component 100 '. The cover panel 200' is a window of the display panel so that a displayed image of the display panel can be externally observed. When the display panel is used, ambient light incident from the outside is reflected inside the display panel and is perceived by a user, so that the display effect is seriously affected, and the display visibility is reduced. Therefore, the conventional display panel usually has a polarizer 300 ' disposed between the light emitting component 100 ' and the cover plate 200 ' to prevent reflection.
However, since the polarizer 300 ' of the display panel generally does not cover the edge of the light emitting part, the prior art generally forms a light shielding layer 400 ' on the edge of the cover plate 200 ' to prevent the edge light leakage. However, the polarizer 300 ' is generally adhered to the cover plate 200 ' by an adhesion layer 500 ' such as OCA optical adhesive, and the thickness of the adhesion layer 500 ' is generally greater than that of the light shielding layer 400 ', so that the light shielding layer 400 ' and the polarizer 300 ' have a gap, and there is still a high probability that external ambient light enters the inside of the display panel from the gap and is reflected out, which causes light leakage at the edge of the display panel and affects the display effect.
Disclosure of Invention
The present invention is directed to solve the above problems and to provide a display panel and a method for manufacturing the same.
In order to achieve the purpose, the invention adopts the following technical scheme:
a display panel comprises a light emitting component, a covering plate located above the light emitting component, a polaroid located between the light emitting component and the covering plate, a light shielding layer formed at the edge of the covering plate, and an adhesion layer located between the polaroid and the covering plate, wherein the adhesion layer comprises a leakage-proof area located below the light shielding layer, at least part of the light shielding layer is covered by the leakage-proof area, and the refractive index of the leakage-proof area is larger than a certain threshold value so as to refract light reflected to the leakage-proof area to the light shielding layer.
Further, the light shielding layer and the polaroid have an overlapping region in orthographic projection on the light-emitting component.
Further, the adhesion layer further includes an adhesion region surrounded by the leakage preventing region.
Further, the adhesion area and the leakage prevention area are matched to cover the whole covering plate, and the refractive index of the leakage prevention area is higher than that of the adhesion area.
Further, the adhesion layer material is OCA optical cement doped with a photoinitiator.
Further, the shading layer is black in color.
Further, the adhesion layer includes n layers stacked in sequence, the drain preventing region is formed in at least one layer, and n is an integer greater than 1.
A method of manufacturing a display panel, comprising:
providing a covering plate, and forming a light shielding layer at the edge of the covering plate;
forming an adhesion layer, and forming a leakage-proof area in the adhesion layer, wherein the refractive index of the leakage-proof area is greater than a certain threshold value;
providing a light emitting part, and forming a polarizer above the light emitting part;
and adhering the polaroid to the covering plate through the adhesion layer, so that a leakage-proof area of the adhesion layer is positioned below the light shielding layer, and the leakage-proof area covers at least part of the light shielding layer to refract the light reflected to the leakage-proof area to the light shielding layer.
Further, forming a leakage prevention region in the adhesion layer specifically includes: and carrying out ultraviolet irradiation on the adhesion layer to form a leakage-proof area.
Further, ultraviolet irradiation is performed on the adhesion layer to form a leakage prevention region and an adhesion region, and the method specifically includes:
doping a photoinitiator into the OCA optical cement to form an adhesion layer;
attaching the adhesive layer to the cover sheet, covering the entire cover sheet;
and shielding the central area of the OCA optical cement through a mask, and then carrying out ultraviolet illumination on the edge area which is not shielded by the mask to form an anti-leakage area.
Compared with the prior art, the display panel manufactured by the manufacturing method of the display panel has the advantages that the refractive index of the leakage-proof area is larger than a certain threshold value, so that light emitted to the leakage-proof area is refracted to the light shielding layer, and the light leakage phenomenon at the edge of the display panel can be effectively prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art display panel;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic top view of an adhesion layer of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a path of light reflected by the display panel according to an embodiment of the invention;
FIG. 5 is a flow chart illustrating a process for fabricating a display panel according to an embodiment of the present invention;
fig. 6 to 10 are schematic structural diagrams of a display panel manufacturing process according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
Directional phrases used in connection with the present invention, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. For understanding and ease of description, the size and thickness of each component shown in the drawings are arbitrarily illustrated, but the present invention is not limited thereto.
It will be understood that when an element such as a layer, panel, or the like is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, in the description, unless explicitly described to the contrary, the word "comprise" will be understood to mean that the recited components are included, but not to exclude any other components.
The technical solutions provided by the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 2, the display panel provided in the present embodiment includes a light emitting component 100, a cover plate 200 located above the light emitting component 100, a polarizer 300 located between the light emitting component 100 and the cover plate 200, a light shielding layer 400 formed at an edge of the cover plate 200, and an adhesion layer 500 located between the polarizer 300 and the cover plate 200.
The light emitting part 100 includes a first substrate (not shown) and a second substrate (not shown) disposed opposite to each other with a light emitting pixel layer (not shown) formed therebetween. The first and second substrates are typically transparent glass materials or plastic materials. The light-emitting pixel layer is formed between the first substrate and the second substrate and comprises a plurality of light-emitting units formed by sub-pixel units of different colors, and the light-emitting units are used for realizing color display. The light emitting component of the present embodiment is an organic light emitting component, but the present invention is not limited thereto.
The cover plate 200 is located at a side of the light emitting part 100 facing the display image, and is a window of the display panel. An external observer (e.g., a person) observes the displayed image of the display panel through the cover plate 200. The light emitting part 200 covers the light emitting part 100, and protects the light emitting part 100 from external damage.
The polarizer 300 is located between the light emitting part 100 and the cover plate 200, and is fixed to both the light emitting part 100 and the cover plate 200 by adhesion. The polarizer 300 prevents ambient light from outside and entering the display panel through the cover plate 200 or elsewhere from being reflected out to be perceived by an external observer, improving display visibility.
The light shielding layer 400 is formed at the edge of the cover plate 200. The light shielding layer 400 has a light blocking function, so that external ambient light is prevented from entering the display panel, and the incident amount of the ambient light is reduced; on the other hand, light that has entered the display panel and is reflected is absorbed, thereby preventing edge light leakage. The drain-proof region 510 covers at least a portion of the light-shielding layer 400, and the light-shielding layer 400 and the orthographic projection of the polarizer 300 on the light-emitting component 200 have an overlapping region, so that the light-shielding layer can better prevent edge light leakage. Meanwhile, since black has a good light absorption effect, the surface color of the light shielding layer is preferably black, but the invention is not limited thereto, and the surface of the light shielding layer with a good light absorption effect of other colors can be applied to the display panel of the invention. The light-shielding layer 400 can be made of a black matrix material, and the light-shielding layer 400 also has the function of shielding the internal structure of the edge of the display panel, so that the display panel looks neat and beautiful.
The adhesive layer 500 is used to adhere the polarizer 300 and the cover plate 200, which is an adhesive material having high transmittance. The material of the adhesion layer 500 in this embodiment is OCA optical cement doped with a photoinitiator. Of course, other embodiments of the adhesion layer 500 may be other materials, and are not limited herein. The form of the adhesive layer 500 is not limited to the solid adhesive tape, and it may be liquid glue, which is not limited herein. Referring to fig. 3, the adhesion layer 500 includes a leakage preventing region 510 under the light shielding layer 400 and an adhesion region 520 surrounded by the leakage preventing region 510. In this embodiment, the inner edge of the anti-drain region 510 is more inward than the inner edge of the light-shielding layer 400, and the anti-drain region 510 is partially aligned with the light-shielding layer 400, although the invention is not limited thereto, and the anti-drain region 510 is located below the light-shielding layer 400, and may be partially aligned with the light-shielding layer 400, or may be completely aligned with the light-shielding layer 400. The anti-drain region 510 is formed by uv light treatment, and the bonding region 520 is a portion which is not subjected to the uv light treatment, and the detailed process is described in the following method for manufacturing the display panel. Since the ultraviolet irradiation treatment is performed, the refractive index of the leakage preventing region 510 is higher than that of the bonding region 520. Referring to fig. 4, the refractive index of the leakage preventing region 510 is increased to be greater than a certain threshold value, so that the exit route of the stray light (stray light, i.e., abnormal light emitting light, such as light reflected by external ambient light entering into the display panel) at the inner edge of the display panel is changed. Since the refractive index of the leakage-preventing region 510 is increased, the light emitted to the leakage-preventing region 510 is refracted to the light-shielding layer 400, and the light-shielding layer 400 has a light-absorbing effect, so that the edge light leakage phenomenon is effectively prevented in the present embodiment.
In the embodiment, the refractive index of the adhesion layer 500 (mainly the leakage-proof area 510 at the edge of the adhesion layer 500) is adjusted, so that the refractive index of the leakage-proof area 510 is greater than a certain threshold value, and the light emitted to the leakage-proof area 510 is refracted to the light-shielding layer 400, thereby effectively preventing the light leakage phenomenon at the edge of the display panel. Of course, the structure of the light-shielding layer 400 in other embodiments of the present invention may also be different from that in the present embodiment. For example, the adhesion layer 500 of the embodiment includes a leakage-proof region 510 under the light-shielding layer 400 and an adhesion region 520 surrounded by the leakage-proof region 510, and the adhesion region 520 and the leakage-proof region 510 cooperatively cover the entire cover plate 200 to achieve a large adhesion area between the polarizer 300 and the cover plate 200, thereby increasing the adhesion firmness, but the invention is not limited thereto, as long as the adhesion of the leakage-proof region 510 is sufficient, and the light-shielding layer 400 of other embodiments may include only the leakage-proof region 510, or in order to increase the adhesion, other embodiments may include the leakage-proof region 510 and the adhesion region 520, but the adhesion region 520 may not be continuous as in the embodiment, and may be discontinuous segments.
In addition, the refractive index of the edge leakage-proof area 510 is increased in this embodiment, but the adhesion area 520 is not treated with uv light in order to maintain the adhesion of the adhesion area 520 to make the polarizer 300 and the cover plate 200 adhere together firmly, but in other embodiments, the adhesion area 520 and the adhesion area 510 may be irradiated with uv light at the same time, and the refractive index is increased, i.e., the refractive index of the adhesion layer 500 is increased uniformly, or even the material itself selected for the adhesion layer 500 has a refractive index greater than a certain threshold, or the adhesion layer 500 may not be treated. In the present embodiment, the refractive index of the leakage prevention region 510 is increased over the entire thickness in the thickness direction, but the present invention is not limited thereto, and the refractive index of the leakage prevention region 510 may be increased over only a portion of the thickness in the thickness direction. Moreover, the adhesion layer 500 of the present embodiment has only one layer, but the adhesion layer 500 of other embodiments may further include n layered layers sequentially stacked, the leakage preventing region 510 is formed in at least one layered layer, n is an integer greater than 1, the n layered layers may be the same or different, and the adhesion layer 500 may be provided in multiple layers to optimize the adhesion of the adhesion layer 500 while preventing edge light leakage by increasing the refractive index of the leakage preventing region 510. In the embodiment of the invention, as long as the refractive index of the anti-leakage region 510 is greater than a certain threshold value, the light emitted to the anti-leakage region 510 is refracted to the light shielding layer 400, and the light leakage phenomenon at the edge of the display panel can be effectively prevented.
As shown in fig. 5, the method for manufacturing a display panel of the present embodiment includes:
step 1, providing a cover plate 200, and forming a light shielding layer 400 on the edge of the cover plate 200, as shown in fig. 6.
Step 2, forming an adhesion layer 500, and processing the adhesion layer 500 to form a leakage-proof region 510, wherein the refractive index of the leakage-proof region 510 is greater than a certain threshold, as shown in fig. 7.
The method specifically comprises the following steps:
the adhesion layer 500 is formed by doping a photoinitiator into the OCA optical paste.
After the photoinitiator is introduced, the refractive index of the OCA optical cement can be improved when the photoinitiator is irradiated by ultraviolet light.
The adhesive layer 500 is applied to the cover plate 200 covering the entire cover plate 200.
The adhesive layer 500 covers the entire area of the cover plate 200 and may be more securely adhered to the cover plate 200.
As shown in fig. 8, the central region of the OCA optical paste is masked by a mask (M), and then ultraviolet light (UV) is applied to the edge region that is not masked by the mask, thereby forming an anti-drain region 510.
The leakage-proof region is located at the edge region of the adhesive layer 500, and the central region of the adhesive layer 500 covered by the mask is the adhesive region 520.
The present embodiment forms the leakage preventing region 510 having a refractive index greater than a certain threshold by this method. Of course, other embodiments may be formed in other ways, and are not limited thereto.
Step 3, providing a light emitting component 100, and forming a polarizer 300 above the light emitting component 100, as shown in fig. 9.
Step 4, adhering the polarizer 300 to the cover plate 200 through the adhesive layer 500 such that the leakage preventing regions 510 of the adhesive layer 500 are located under the light shielding layer 400, to refract the light emitted to the leakage preventing regions 510 to the light shielding layer 400, as shown in fig. 10.
It should be noted that the above sequence of step 1 to step 4 is not unique, and in the specific manufacturing process of other embodiments of the present invention, each step can be flexibly exchanged according to actual situations. This embodiment attaches the adhesive layer 500 to the cover sheet 200 during step 2, and then attaches the polarizer 300 to the cover sheet 200 via the adhesive layer 500 during step 4. Other embodiments may attach the adhesive layer 500 to the polarizer 300 and then adhere the cover plate 200 to the polarizer 300 through the adhesive layer 500.
In summary, in the display panel manufactured by the method for manufacturing a display panel of the present embodiment, the refractive index of the leakage-proof area 510 is greater than a certain threshold value, so as to refract the light emitted to the leakage-proof area 510 to the light-shielding layer 400, thereby effectively preventing the light leakage phenomenon at the edge of the display panel.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A display panel comprises a light emitting component, a polaroid, a covering plate, an adhesion layer and a light shielding layer, wherein the light emitting component, the polaroid, the covering plate, the adhesion layer and the light shielding layer are arranged in a stacked mode, the adhesion layer comprises a leakage prevention area, the leakage prevention area is located below the light shielding layer, the leakage prevention area covers at least part of the light shielding layer, and the refractive index of the leakage prevention area is larger than a certain threshold value so that light emitted to the leakage prevention area is refracted to the light shielding layer.
2. The display panel of claim 1, wherein the leakage preventing region covers the light shielding layer.
3. The display panel according to claim 1, wherein the light shielding layer and the polarizer have an overlapping region in an orthogonal projection on the light emitting part.
4. The display panel of claim 1, wherein the adhesive layer further comprises an adhesive region surrounded by the leakage prevention region.
5. The display panel of claim 4, wherein the bonding region and the leakage prevention region cooperate to cover the entire cover plate, and the leakage prevention region has a higher refractive index than the bonding region.
6. The display panel according to claim 1, wherein the drain prevention region material is OCA optical cement doped with a photoinitiator.
7. The display panel according to claim 1, wherein the light-shielding layer surface is black.
8. The display panel according to claim 1, wherein the adhesion layer comprises n layers stacked in sequence, the anti-drain region is formed in at least one layer, and n is an integer greater than 1.
9. A method of manufacturing a display panel, comprising:
providing a covering plate, and forming a light shielding layer at the edge of the covering plate;
forming an adhesion layer, and forming a drain prevention region in the adhesion layer, wherein the refractive index of the drain prevention region is greater than a certain threshold value so as to refract light emitted to the drain prevention region to the light shielding layer;
providing a light emitting part, and forming a polarizer above the light emitting part;
and adhering the polarizer to the covering plate through the adhesive layer, so that a leakage-proof area of the adhesive layer is positioned below the light shielding layer, and the leakage-proof area covers at least part of the light shielding layer.
10. The method for manufacturing a display panel according to claim 9, wherein the forming of the anti-drain region by ultraviolet irradiation of the adhesion layer specifically comprises:
doping a photoinitiator into the OCA optical cement to form an adhesion layer;
attaching the adhesive layer to the cover sheet, covering the entire cover sheet;
and shielding the central area of the OCA optical cement through a mask, and then carrying out ultraviolet illumination on the edge area which is not shielded by the mask to form an anti-leakage area.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108877508B (en) * | 2018-07-16 | 2021-08-24 | 京东方科技集团股份有限公司 | Display module and preparation method thereof |
| CN109390500A (en) * | 2018-12-03 | 2019-02-26 | 武汉华星光电半导体显示技术有限公司 | Display module and preparation method thereof, electronic device |
| US10879499B2 (en) | 2018-12-03 | 2020-12-29 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display module, manufacturing method thereof and electronic device |
| CN110989240B (en) * | 2019-12-26 | 2022-10-28 | 上海天马微电子有限公司 | Display module, electronic equipment and preparation method of display module |
| CN113377242B (en) * | 2021-06-22 | 2023-12-15 | 武汉华星光电技术有限公司 | Display module |
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Application publication date: 20180710 Assignee: Yungu (Gu'an) Technology Co., Ltd.|Bazhou Yungu Electronic Technology Co., Ltd.|Kunshan Institute of technology new flat panel display technology center Co., Ltd Assignor: Kunshan Guo Xian Photoelectric Co., Ltd. Contract record no.: X2019990000156 Denomination of invention: Display panel and making method thereof License type: Common License Record date: 20191030 |
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Effective date of registration: 20191209 Address after: No. 2 Xiangshan Avenue, Yongning Street, Zengcheng District, Guangzhou, Guangdong province (the core of Zengcheng economic and Technological Development Zone) Applicant after: Guangzhou Guoxian Technology Co., Ltd Address before: 215300, No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou, 4 Applicant before: Kunshan Guo Xian Photoelectric Co., Ltd. |
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