CN110767095B - Flexible display module, preparation method thereof and flexible display device - Google Patents
Flexible display module, preparation method thereof and flexible display device Download PDFInfo
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- CN110767095B CN110767095B CN201911105167.3A CN201911105167A CN110767095B CN 110767095 B CN110767095 B CN 110767095B CN 201911105167 A CN201911105167 A CN 201911105167A CN 110767095 B CN110767095 B CN 110767095B
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- 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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The embodiment of the invention provides a flexible display module, a preparation method thereof and a flexible display device, relates to the technical field of display, and can support a display panel and a sensor layer without influencing the flexibility of the flexible display module. The flexible display module comprises a substrate, a sensor layer, a supporting layer and a display panel which are sequentially stacked; the supporting layer is used for supporting the display panel and the sensor layer; the supporting layer comprises at least one sub-supporting layer, and the sub-supporting layer is provided with a hollow area.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display module, a preparation method of the flexible display module and a flexible display device.
Background
In recent years, the display field has realized the application of flexible display devices. As shown in fig. 1, a gap (gap) exists between the display panel and the sensor layer, so that when a user presses the flexible display device, the display panel is deformed due to lack of support, and thus a distortion phenomenon occurs, which affects normal functions of the sensor in the display device.
Disclosure of Invention
The embodiment of the invention provides a flexible display module, a preparation method thereof and a flexible display device, which can support a display panel and a sensor layer without influencing the flexibility of the flexible display module.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a flexible display module is provided, which includes a substrate, a sensor layer, a supporting layer, and a display panel, which are sequentially stacked; the supporting layer is used for supporting the display panel and the sensor layer; the supporting layer comprises at least one sub-supporting layer, and the sub-supporting layer is provided with a hollow area.
Optionally, the sensor layer is a texture recognition layer; the sensor layer is located on an opposite side of the display panel.
Optionally, the supporting layer includes a plurality of sub-supporting layers arranged in a stacked manner; the orthographic projection of the hollow-out area of any one sub-supporting layer on the substrate is overlapped with the orthographic projection of other sub-supporting layers on the substrate.
Optionally, orthographic projections of the hollow areas of the adjacent sub-support layers on the substrate are not overlapped.
Optionally, the sensor layer includes a plurality of sensing units; under the condition that the sensor layer is a line identification layer, the orthographic projection of the sub-supporting layer adjacent to the sensor layer on the sensor layer at least overlaps with the edge of the line identification unit; the number of the sub-supporting layers is even, and the refractive index of the sub-supporting layers is larger than 1.
Optionally, the supporting layer includes a plurality of sub-supporting layers arranged in a stacked manner; the patterns of the plurality of sub-supporting layers are the same.
Optionally, the flexible display module further comprises a rubber frame; the rubber frame is located between the display panel and the substrate and arranged around the sensor layer in a circle.
Optionally, the material of the support layer includes an optical adhesive.
In a second aspect, a flexible display device is provided, which includes the flexible display module of the first aspect.
In a third aspect, a method for manufacturing a flexible display module is provided, including: sequentially forming a sensor layer and a supporting layer on a substrate; the supporting layer comprises at least one sub-supporting layer, and the sub-supporting layer is provided with a hollow area; fixedly connecting the substrate, the sensor layer and the supporting layer with a display panel; the sensor layer is located between the substrate and the display panel.
The embodiment of the invention provides a flexible display module, a preparation method thereof and a flexible display device. Compared with the prior art, on one hand, the supporting layer can support the display panel and the sensor layer, and the influence on the normal function of the sensor layer due to the distortion phenomenon of the flexible display module is avoided; on the other hand, because sub-supporting layer has the fretwork region, consequently, flexible display module can not lead to the pliability to reduce because of having increased the supporting layer, and then the fracture.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible display module provided in the prior art;
fig. 2 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention;
fig. 7 is a schematic top view illustrating a flexible display module according to an embodiment of the present invention;
FIG. 8 is a diagram of a light path of light passing through a flexible display module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention;
fig. 10 is a flowchart illustrating a process of manufacturing a flexible display module according to an embodiment of the present invention.
Reference numerals:
1-a frame; 2-a flexible display module; 3-a circuit board; 4-cover plate; 11-a substrate; 12-a sensor layer; 13-a display panel; 14-a support layer; 141-sub support layer; 15-glue frame; 151-middle frame; 152-middle frame glue.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
The flexible display device can be used as a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a vehicle-mounted computer, and the like, and the specific application of the flexible display device is not particularly limited in the embodiment of the invention.
As shown in fig. 2, the flexible display device may include, for example, a frame 1, a flexible display module 2, a cover plate 4, and other electronic components such as a camera.
The embodiment of the invention provides a flexible display module 2, and the flexible display module 2 can be used as the flexible display module 2 in the flexible display device.
As shown in fig. 3 to 6, the flexible display module 2 includes a substrate 11, a sensor layer 12, a support layer 14, and a display panel 13, which are sequentially stacked; the support layer 14 is for supporting the display panel 13 and the sensor layer 12; the support layer 14 includes at least one sub-support layer 141, and the sub-support layer 141 has a hollow area.
In some embodiments, the flexible display module 2 is flexible, and therefore, the material of the substrate 11 may be, for example, Polyimide (PI).
In some embodiments, the positional relationship between the sensor layer 12 and the display panel 13 is not limited as long as the sensor layer 12 does not affect the normal display of the display panel 13 and the display light of the display panel 13 does not affect the normal function of the sensor layer 12.
As an example, the sensor layer 12 may be disposed on the light emitting side of the display panel 13; alternatively, the sensor layer 12 may be disposed on the opposite side of the display panel 13.
In some embodiments, the function of the sensor layer 12 is not limited as long as the sensor layer 12 can be integrated in the flexible display module 2, so that the flexible display module 2 can realize a certain function.
As an example, the sensor layer 12 may be a texture recognition layer. The sensor layer 12 includes a plurality of sensing units, which may be texture recognition units. The line recognition unit may be a photodiode or a photodiode.
Here, the sensor layer 12 is optionally disposed on the opposite side of the display panel 13.
Alternatively, the sensor layer 12 may be a touch layer. The sensing unit may be a touch electrode; on this basis, the sensor layer 12 may further include a touch electrode lead.
In some embodiments, the shape of the sub support layer 141 is not limited as long as the sub support layer 141 can be fixed between the display panel 13 and the sensor layer 12 and has a hollowed-out area.
For example, the sub-support layer 141 may be a mesh; alternatively, the sub-support layer 141 may include a plurality of block structures.
In some embodiments, the material of the support layer 14 is not limited as long as it can function as a support.
Here, if the support layer 14 includes a plurality of sub-support layers 141, the materials of the plurality of sub-support layers 141 may be the same or different.
In some embodiments, the arrangement position of the sub-support layer 141 is not limited as long as it can perform a supporting function.
The embodiment of the invention provides a flexible display module 2, which comprises a sensor layer 12, a display panel 13 and a supporting layer 14 arranged between the sensor layer 12 and the display panel 13, wherein the supporting layer 14 comprises at least one sub-supporting layer 141, and the sub-supporting layer 141 is provided with a hollow area. Compared with the prior art, on one hand, the supporting layer 14 can support the display panel 13 and the sensor layer 12, and the influence on the normal function of the sensor layer 12 caused by the distortion phenomenon of the flexible display module 2 is avoided; on the other hand, since the sub-supporting layer 141 has the hollow area, the flexible display module 2 does not have reduced flexibility due to the addition of the supporting layer 14, and thus is not broken.
Alternatively, as shown in fig. 4 and 7, the support layer 14 includes a plurality of sub-support layers 141 arranged in a stacked manner; the orthographic projection of the hollow-out area of any one sub-support layer 141 on the substrate 11 is overlapped with the orthographic projection of the other sub-support layers 141 on the substrate 11.
That is, although each of the sub-support layers 141 has a hollowed-out area, the support layer 14 including a plurality of sub-support layers 141 arranged in a stack has no hollowed-out area.
In the embodiment of the invention, the whole supporting layer 14 has no hollow area, so that the pressure applied to each position of the supporting layer 14 tends to be uniform as much as possible, and the fracture caused by overlarge pressure applied to the partial area in the supporting layer 14 is prevented.
Alternatively, as shown in fig. 4, the orthographic projections of the hollow areas of the adjacent sub-support layers 141 on the substrate 11 have no overlap.
In some embodiments, when the number of the sub support layers 141 is 3 or more, the patterns of the plurality of sub support layers 141 positioned at the odd-numbered layers may be the same, and the patterns of the plurality of sub support layers 141 positioned at the even-numbered layers may be the same. Thus, the process for producing the support layer 14 can be simplified, and the production cost can be reduced.
In the embodiment of the present invention, compared with the case that the orthographic projections of the hollow-out areas of more sub-supporting layers 141 on the substrate 11 are not overlapped, by making the orthographic projections of the hollow-out areas of two adjacent sub-supporting layers 141 on the substrate 11 be not overlapped, on one hand, the number of the sub-supporting layers 141 can be reduced, and the preparation process is simplified; on the other hand, the excessive number of the supporting layers 141 can be prevented, and the entire supporting layer 14 still has a partial hollow area.
Alternatively, as shown in fig. 8, the sensor layer 12 includes a plurality of sensing units; in the case that the sensor layer 12 is a grain recognition layer, the orthographic projection of the sub-support layer 141 adjacent to the sensor layer 12 on the sensor layer 12 is at least overlapped with the edge of the grain recognition unit; the number of the sub-support layers 141 is an even number, and the refractive index of the sub-support layers 141 is greater than 1.
Here, as will be understood by those skilled in the art, the principle of texture recognition using a texture recognition layer is as follows: light (such as display light) emitted from the flexible display device irradiates an object to be detected (such as a finger) with a texture, then is reflected by the finger, and reflected light reflected by the finger irradiates the texture recognition layer; the line identification layer receives the reflected light, converts the optical signal into an electrical signal and sends the electrical signal to the line identification circuit; the line recognition circuit obtains a line image according to the received electric signal, and compares the line image with a line image prestored in the flexible display device to recognize lines.
As shown in fig. 8, the solid line with arrows represents the path of the reflected light after the light is reflected by the finger in the embodiment of the present invention. The dashed line represents the path of the reflected light reflected by the finger of the prior art.
Here, as shown in fig. 8, since the number of the sub-support layers 141 is even, the refractive index of the hollow area is 1, and the refractive index of the sub-support layer 141 is greater than 1, the number of times of light scattering to light density of light reflected by a finger is always 1 more than the number of times of light scattering to light scattering.
The refractive index of the hollow area is 1, and the refractive index of the sub-supporting layer 141 adjacent to the grain identification unit is greater than 1. Assuming that the refractive index of the hollow area is n1, the incident angle of the light incident on the sub-support layer 141 adjacent to the grain recognition unit is α 1, the refractive index of the sub-support layer 141 adjacent to the grain recognition unit is n2, and the refractive angle of the light incident on the sub-support layer 141 adjacent to the grain recognition unit is α 2, where n1 is less than n2, n2sin α 2 is obtained according to the formula n1sin α 1: alpha 1 > alpha 2. Thus, as shown in fig. 8, at the same position of the embodiment of the present invention and the prior art texture recognition unit, the texture recognition unit of the embodiment of the present invention corresponds to the coverage d2 of the finger at the position, and the prior art texture recognition unit corresponds to the coverage d1 of the finger at the position, that is, the light reflected by the finger received by one texture recognition unit of the embodiment of the present invention is more divergent than the light received by the prior art texture recognition unit.
On this basis, because the orthographic projection of the sub-support layer 141 adjacent to the sensor layer 12 on the sensor layer 12 is at least overlapped with the edge of the grain identification unit, the area of the finger coverage area corresponding to each grain identification unit can be determined by the edge of the grain identification unit, and because the light received by the edge part of the grain identification unit is more divergent, the area of the finger coverage area corresponding to each grain identification is larger, so that the requirement of the number (sensor pitch inc) of the grain identification units owned by each Inch can be reduced.
In some embodiments, optionally, the orthographic projection of the sub-support layer 141 adjacent to the sensor layer 12 on the sensor layer 12 completely overlaps with the texture recognition unit.
Alternatively, as shown in fig. 5 and 6, the support layer 14 includes a plurality of sub-support layers 141 arranged in a stacked manner; the patterns of the plurality of sub support layers 141 are the same.
In the embodiment of the present invention, the preparation process of the supporting layer 14 can be simplified by making the patterns of the plurality of sub-supporting layers 141 the same; compared with other schemes, under the condition that the number of the sub-supporting layers 141 is the same, the number of mask plates for preparing the supporting layer 14 can be reduced, and thus the preparation cost is saved.
Optionally, as shown in fig. 9, the flexible display module 2 further includes a rubber frame 15; the glue frame 15 is located between the display panel 13 and the substrate 11, and is disposed around the sensor layer 12.
The frame 15 includes a middle frame 151 and a middle frame 152. The middle frame 151 can support the substrate 11 and the display panel 13, and the middle frame adhesive 152 can fix the middle frame 151 on the display panel 13.
In the embodiment of the present invention, a glue frame 15 may be further provided to form a sealing structure, so as to protect the sensor layer 12 and the support layer 14.
Optionally, the material of the support layer 14 includes an optical glue.
Illustratively, the material of the support layer 14 is Optically Clear Adhesive (OCA).
In the embodiment of the present invention, the material of the supporting layer 14 includes an optical adhesive, on one hand, the optical adhesive does not block light; on the other hand, the optical cement has adhesiveness, can be directly attached to the substrate 11, and has a simple process.
The embodiment of the invention also provides a preparation method of the flexible display module 2, which can be realized by the following steps as shown in fig. 10:
s11, sequentially forming a sensor layer 12 and a support layer 14 on a substrate 11; the support layer 14 includes at least one sub-support layer 141, and the sub-support layer 141 has a hollow area.
Here, if the support layer 14 includes a plurality of sub-support layers 141, the plurality of sub-support layers 141 are formed layer by layer.
In some embodiments, the manufacturing process of the sub-support layer 141 is not limited, and the manufacturing process of the sub-support layer 141 is related to a material thereof.
Illustratively, the sub-support layer 141 may be formed using a photolithography process. Forming a support film on a substrate 11; forming photoresist on the supporting film, and exposing and developing the photoresist to obtain a photoresist pattern; the supporting film is etched to obtain the sub-supporting layer 141.
If the support layer 14 includes a plurality of sub-support layers 141, the above steps are repeated a plurality of times.
S12, fixedly connecting the substrate 11, the sensor layer 12 and the support layer 14 with the display panel 13; the sensor layer 12 is located between the substrate 11 and the display panel 13.
The embodiment of the invention provides a preparation method of a flexible display module 2, wherein the flexible display module 2 comprises a sensor layer 12, a display panel 13 and a support layer 14 arranged between the sensor layer 12 and the display panel 13, the support layer 14 comprises at least one sub-support layer 141, and the sub-support layer 141 is provided with a hollow area. Compared with the prior art, on one hand, the supporting layer 14 can support the display panel 13 and the sensor layer 12, and the influence on the normal function of the sensor layer 12 caused by the distortion phenomenon of the flexible display module 2 is avoided; on the other hand, since the sub-supporting layer 141 has the hollow area, the flexible display module 2 does not have reduced flexibility due to the addition of the supporting layer 14, and thus is not broken.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A flexible display module is characterized by comprising a substrate, a sensor layer, a supporting layer and a display panel which are sequentially stacked;
the supporting layer is used for supporting the display panel and the sensor layer; the supporting layer comprises a plurality of sub supporting layers which are arranged in a stacked mode;
the sub-supporting layer is provided with a hollow area;
the orthographic projection of the hollow-out area of any one sub-supporting layer on the substrate is overlapped with the orthographic projection of other sub-supporting layers on the substrate;
orthographic projections of the hollow areas of the adjacent sub-supporting layers on the substrate are not overlapped;
the sensor layer comprises a plurality of sensing units;
the sensor layer is a line identification layer; the orthographic projection of the sub-supporting layer adjacent to the sensor layer on the sensor layer at least overlaps with the edge of the grain identification unit;
the number of the sub-supporting layers is even, and the refractive index of the sub-supporting layers is larger than 1.
2. The flexible display module of claim 1, wherein the sensor layer is located on an opposite side of the display panel.
3. The flexible display module of claim 1 or 2, wherein the support layer comprises a plurality of sub-support layers arranged in a stack;
the patterns of the plurality of sub-supporting layers are the same.
4. The flexible display module of claim 1 or 2, further comprising a glue frame;
the rubber frame is located between the display panel and the substrate and arranged around the sensor layer in a circle.
5. The flexible display module of claim 1, wherein the material of the support layer comprises an optical glue.
6. A flexible display device, comprising the flexible display module according to any one of claims 1 to 5.
7. A preparation method of a flexible display module is characterized by comprising the following steps:
sequentially forming a sensor layer and a supporting layer on a substrate; the supporting layer comprises a plurality of sub supporting layers which are arranged in a stacked mode, and the sub supporting layers are provided with hollow areas; the orthographic projection of the hollow-out area of any one sub-supporting layer on the substrate is overlapped with the orthographic projection of other sub-supporting layers on the substrate; orthographic projections of the hollow areas of the adjacent sub-supporting layers on the substrate are not overlapped; the number of the sub-supporting layers is even, and the refractive index of the sub-supporting layers is greater than 1;
the sensor layer comprises a plurality of sensing units; the sensor layer is a line identification layer; the orthographic projection of the sub-supporting layer adjacent to the sensor layer on the sensor layer at least overlaps with the edge of the grain identification unit;
fixedly connecting the substrate, the sensor layer and the supporting layer with a display panel; the sensor layer is located between the substrate and the display panel.
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