CN115019665B - Flexible display screen, display device and manufacturing method of flexible display screen - Google Patents
Flexible display screen, display device and manufacturing method of flexible display screen Download PDFInfo
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- CN115019665B CN115019665B CN202210804696.8A CN202210804696A CN115019665B CN 115019665 B CN115019665 B CN 115019665B CN 202210804696 A CN202210804696 A CN 202210804696A CN 115019665 B CN115019665 B CN 115019665B
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- 238000000059 patterning Methods 0.000 claims description 6
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- 238000005096 rolling process Methods 0.000 description 19
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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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
- 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 application discloses a flexible display screen, a display device and a manufacturing method of the flexible display screen. The flexible display screen comprises a display screen main body and a supporting layer, wherein the display screen main body is provided with a light-emitting surface and a backlight surface which are oppositely arranged, the display screen main body comprises a display area and a non-display area, the supporting layer is attached to the backlight surface of the display screen main body, and the supporting layer comprises a first supporting part positioned in the non-display area and a second supporting part positioned in the display area. According to the application, the support layer is attached to the backlight surface of the display screen main body, and the maximum value of the height of one side, away from the backlight surface, of the first support part relative to the backlight surface is larger than the maximum value of the height of one side, away from the backlight surface, of the second support part relative to the backlight surface, so that the first support part can separate the display areas of the display screen main bodies of two adjacent circles, and the display areas are prevented from being damaged due to mutual friction between the flexible display screens of two adjacent circles in the winding or unfolding process of the flexible display screen, so that the display effect is affected.
Description
Technical Field
The application relates to the field of display, in particular to a flexible display screen, a display device and a manufacturing method of the flexible display screen.
Background
With the development of display technology, flexible display technology is increasingly favored, and currently, the application of large-size flexible display screens is mainly in a curled form, and is generally divided into Yun Sheng type curling in which a scroll is stored downwards at the bottom and curtain type curling in which a scroll is stored upwards at the top. However, at present, the two forms can generate curling friction problems in application, namely when the current flexible display screen is curled on a scroll or is unfolded from the scroll, mutual friction can be generated between two adjacent circles of flexible display screens, so that the surface of the flexible display screen is damaged, and the display effect of the flexible display screen is affected.
Disclosure of Invention
The embodiment of the application provides a flexible display screen, a display device and a manufacturing method of the flexible display screen, which can solve the problem that the display effect is affected due to mutual friction between two adjacent circles of flexible display screens in the rolling or unfolding process of the conventional flexible display screen.
An embodiment of the present application provides a flexible display screen, including:
the display screen comprises a display screen main body, a display screen display module and a display screen display module, wherein the display screen main body is provided with a light-emitting surface and a backlight surface which are oppositely arranged, and the display screen main body comprises a display area and a non-display area;
the support layer is attached to the backlight surface of the display screen main body, the support layer comprises a first support portion located in the non-display area and a second support portion located in the display area, and the maximum value of the height of one side, away from the backlight surface, of the first support portion relative to the backlight surface is larger than the maximum value of the height of one side, away from the backlight surface, of the second support portion relative to the backlight surface.
Optionally, in some embodiments of the present application, a side of the first supporting portion facing away from the backlight surface is provided with a plurality of first grooves, the first grooves extend along a first direction, the plurality of first grooves are disposed at intervals along a second direction, and the first direction forms an included angle with the second direction.
Optionally, in some embodiments of the present application, the non-display area includes two first sub-non-display areas distributed on two opposite sides of the display area along the second direction, and the first groove is formed on the first supporting portion corresponding to at least one of the first sub-non-display areas.
Optionally, in some embodiments of the present application, the non-display area includes two second sub-non-display areas distributed on two opposite sides of the display area along the first direction, and the first grooves are formed on the first supporting portions corresponding to the two second sub-non-display areas.
Optionally, in some embodiments of the present application, a side of the second supporting portion facing away from the backlight surface is provided with a plurality of second grooves.
Optionally, in some embodiments of the present application, the second grooves extend along the first direction, and the second grooves are staggered in the second direction; or alternatively, the first and second heat exchangers may be,
the second grooves extend along the second direction, and the second grooves are staggered in the first direction.
Optionally, in some embodiments of the present application, the second groove penetrates the second supporting portion along a direction of the backlight surface toward the light emitting surface.
Optionally, in some embodiments of the application, the thickness of the second support is greater than or equal to 50 microns and less than or equal to 200 microns; the thickness of the first supporting part is larger than that of the second supporting part, and the difference between the thicknesses of the first supporting part and the second supporting part is larger than or equal to 300 micrometers and smaller than or equal to 500 micrometers.
Correspondingly, the embodiment of the application also provides a display device, which comprises the flexible display screen and a scroll, wherein one side of the flexible display screen is connected with the scroll, and the scroll is used for unwinding or winding the flexible display screen.
Correspondingly, the embodiment of the application also provides a manufacturing method of the flexible display screen, which comprises the following steps:
providing a display screen main body, wherein the display screen main body is provided with a light-emitting surface and a backlight surface which are oppositely arranged, and the display screen main body comprises a display area and a non-display area;
providing a supporting layer, and carrying out patterning treatment on the supporting layer to form a first supporting part and a second supporting part, wherein the first supporting part corresponds to the non-display area, and the second supporting part corresponds to the display area;
and attaching the support layer on the backlight surface of the display screen main body, wherein the maximum value of the height of one side, away from the backlight surface, of the first support part relative to the backlight surface is larger than the maximum value of the height of one side, away from the backlight surface, of the second support part relative to the backlight surface.
The flexible display screen comprises a display screen main body and a supporting layer, wherein the display screen main body is provided with a light-emitting surface and a backlight surface which are oppositely arranged, the display screen main body comprises a display area and a non-display area, the supporting layer is attached to the backlight surface of the display screen main body, the supporting layer comprises a first supporting part positioned in the non-display area and a second supporting part positioned in the display area, and the maximum value of the height of one side of the first supporting part, which is away from the backlight surface, relative to the backlight surface is larger than the maximum value of the height of one side of the second supporting part, which is away from the backlight surface, relative to the backlight surface. According to the application, the support layer is attached to the backlight surface of the display screen main body, and the maximum value of the height of one side, away from the backlight surface, of the first support part relative to the backlight surface is larger than the maximum value of the height of one side, away from the backlight surface, of the second support part relative to the backlight surface, so that the first support part can separate the display areas of the display screen main bodies of two adjacent circles, and the display areas are prevented from being damaged due to mutual friction between the flexible display screens of two adjacent circles in the winding or unfolding process of the flexible display screen, so that the display effect is affected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a flexible display screen according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a display screen main body according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a support layer according to an embodiment of the present application;
FIG. 4 is a cross-sectional view of view A-A of FIG. 3, provided by an embodiment of the present application;
FIG. 5 is a schematic view of another support layer according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a winding state of a display device according to an embodiment of the present application;
fig. 7 is a schematic structural view of an unfolded state of a display device according to an embodiment of the present application;
fig. 8 is a flowchart of a method for manufacturing a flexible display screen according to an embodiment of the present application.
Reference numerals illustrate:
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
The embodiment of the application provides a flexible display screen, a display device and a manufacturing method of the flexible display screen, and the flexible display screen, the display device and the manufacturing method are described in detail below. The following description of the embodiments is not intended to limit the preferred embodiments.
First, as shown in fig. 1, the flexible display 100 according to the embodiment of the present application includes a display main body 110, where the display main body 110 has a light emitting surface 111 and a backlight surface 112 that are disposed opposite to each other, and the light emitting surface 111 is a display surface of the flexible display 100. As shown in fig. 2, when the flexible display 100 is manufactured, the flexible display 100 includes a display area S1 and a non-display area S2, and the non-display area S2 is mainly used for forming a driving circuit to regulate and control the display mode of the display area S1; the display area S1 is a main functional area of the flexible display screen 100, and its performance directly affects the display quality of the flexible display screen 100.
The display screen main body 110 includes a flexible substrate 113, a device layer 114, a light emitting layer 115, a packaging layer 116, and a polarizer 117, which are sequentially stacked, where a side of the flexible substrate 113 is a backlight surface 112 of the display screen main body 110, and a side of the polarizer 117 is a light emitting surface 111 of the display screen main body 110. The flexible substrate 113 is used for supporting other film layer structures in the display screen main body 110, and the device layer 114 includes a switch control structure for controlling the light emitting mode of the light emitting layer 115; the packaging layer 116 is used for packaging and protecting the light emitting layer 115 and the device layer 114 to prevent water vapor or oxygen in the external environment from corroding the inside of the display main body 110, and the polarizer 117 is used for adjusting the emergent light of the light emitting layer 115 to improve the display effect of the display main body 110.
As shown in fig. 3 to 5, the flexible display 100 further includes a support layer 120, where the support layer 120 is attached to the backlight surface 112 of the display main body 110, so that the support layer 120 supports the display main body 110 and does not interfere with display of the display main body 110. The support layer 120 includes a first support portion 121 located in the non-display area S2 and a second support portion 122 located in the display area S1, and a maximum value of a height of a side of the first support portion 121 facing away from the backlight surface 112 relative to the backlight surface 112 is greater than a maximum value of a height of a side of the second support portion 122 facing away from the backlight surface 112 relative to the backlight surface 112.
That is, with respect to the backlight surface 112 of the display screen main body 110, the first supporting portion 121 protrudes from the second supporting portion 122, and since the first supporting portion 121 is located in the non-display area S2 and the second supporting portion 122 is located in the display area S1, when the display screen main body 110 is curled, the first supporting portion 121 can support two adjacent turns of the display screen main body 110, so that the display areas S1 of the two adjacent turns of the display screen main body 110 are separated, and damage to the display areas S1 of the two adjacent turns of the display screen main body 110 due to mutual friction in the winding or unwinding process of the flexible display screen 100 is avoided, thereby ensuring the overall display effect of the flexible display screen 100.
Besides separating the two adjacent turns of the display screen main body 110 when the flexible display screen 100 is curled, the first supporting portion 121 can also support the display screen main body 110 when the flexible display screen 100 is unfolded, so as to avoid the display screen main body 110 from bending due to the flexibility of the display screen main body 110, thereby affecting the overall display quality of the flexible display screen 100. Similarly, the second supporting portion 122 can also support the display area S1 of the display screen main body 110, so that the first supporting portion 121 and the second supporting portion 122 integrally support the display screen main body 110 on the backlight surface 112 of the display screen main body 110, so as to improve the flatness of the light emitting surface 111 of the display screen main body 110, thereby improving the display quality of the flexible display screen 100.
In the embodiment of the application, the flexible display screen 100 includes a display screen main body 110 and a supporting layer 120, the display screen main body 110 has a light emitting surface 111 and a backlight surface 112 which are oppositely arranged, the display screen main body 110 includes a display area S1 and a non-display area S2, the supporting layer 120 is attached to the backlight surface 112 of the display screen main body 110, and the supporting layer 120 includes a first supporting portion 121 located in the non-display area S2 and a second supporting portion 122 located in the display area S1. According to the application, the support layer 120 is attached to the backlight surface 112 of the display screen main body 110, and the maximum value of the height of one side, facing away from the backlight surface 112, of the first support part 121 relative to the backlight surface 112 is larger than the maximum value of the height of one side, facing away from the backlight surface 112, of the second support part 122 relative to the backlight surface 112, so that the first support part 121 can separate the display areas S1 of the display screen main body 110 of two adjacent circles, and the display areas S1 of the display screen main body 110 of two adjacent circles are prevented from being damaged due to mutual friction in the winding or unwinding process of the flexible display screen 100, thereby influencing the display effect.
Optionally, a side of the first supporting portion 121 facing away from the backlight surface 112 is provided with a plurality of first grooves 1211. In the process of manufacturing the flexible display 100, the non-display area S2 of the display main body 110 needs to be disposed at the edge of the display area S1, so that the display area S1 of the display main body 110 is located in the middle area of the display main body 110, so as to ensure the overall display quality of the flexible display 100.
When the flexible display screen 100 is curled, a portion of the non-display area S2 of the flexible display screen 100 needs to be connected with a winding structure to realize winding and unwinding of the flexible display screen 100. By providing the plurality of first grooves 1211 on the side of the first supporting portion 121 away from the backlight surface 112, the rigidity of the first supporting portion 121 can be reduced, and the flexibility of the first supporting portion 121 is improved, so that the rebound force between flat curved bonding surfaces is reduced, and the stable rolling and unfolding of the flexible display screen 100 are ensured.
The first grooves 1211 extend along the first direction X, and the plurality of first grooves 1211 are disposed at intervals along the second direction Y, and the first direction X forms an included angle with the second direction Y. In the embodiment of the present application, the winding or unwinding direction of the flexible display screen 100 is defined as a second direction Y, and a direction perpendicular to the second direction Y is defined as a first direction X. The provision of the first grooves 1211 can alleviate the repulsive force of the first support parts 121 located at opposite sides of the first grooves 1211 during the curling of the flexible display screen 100, thereby improving the stability of the flexible display screen 100 when it is rolled up.
In some embodiments, the first grooves 1211 extend along the first direction X and penetrate through opposite sides of the first support 121, such that the first support 121 is entirely composed of strip-like structures of different thicknesses alternately arranged in the second direction Y. This structural design allows two adjacent thicker portions of the first support 121 to be completely separated by the first groove 1211, thereby helping to further relieve the rebound force generated by the first support 121 during the rolling process of the flexible display 100, and further improving the stability of the flexible display 100 when rolled.
Optionally, the non-display area S2 includes two first sub non-display areas S21 distributed on two opposite sides of the display area S1 along the second direction Y, and the first supporting portion 121 corresponding to at least one first sub non-display area S21 is provided with a first groove 1211. Since the second direction Y is the rolling direction of the flexible display screen 100, one of the first sub non-display areas S21 is a connection area between the flexible display screen 100 and the rolling structure, the first groove 1211 can be formed only on the first supporting portion 121 corresponding to the first sub non-display area S21 connected to the rolling structure during the manufacturing process, so as to reduce the rebound force between flat and curved bonding surfaces during the connection, thereby improving the connection stability.
In some embodiments, the first supporting portions 121 corresponding to the two first sub non-display areas S21 are provided with the first grooves 1211, that is, the two first sub non-display areas S21 can be used for being connected with a winding structure, and the connection mode of the flexible display screen 100 and the winding structure is more flexible and convenient due to the structural design, so that different use requirements of the flexible display screen 100 are met.
Optionally, the non-display area S2 includes two second sub non-display areas S22 distributed on opposite sides of the display area S1 along the first direction X, and since the first direction X is perpendicular to the second direction Y, the first supporting portion 121 located in the second sub non-display area S22 and the display screen main body 110 are rolled or unfolded along the second direction Y, and meanwhile, the first supporting portion 121 located in the second sub non-display area S22 can also separate the display areas S1 of the display screen main body 110 of two adjacent turns, so as to avoid the display areas S1 of the display screen main body 110 of two adjacent turns from being damaged due to mutual friction, thereby affecting the overall display quality of the flexible display screen 100.
The first supporting portions 121 corresponding to the two second sub non-display areas S22 are provided with the first grooves 1211, and the first supporting portions 121 located in the second sub non-display areas S22 are rolled or unfolded along the second direction Y together with the display screen main body 110, so that the flexibility of the corresponding first supporting portions 121 can be improved by the arrangement of the first grooves 1211, and the resilience force generated on the first supporting portions 121 in the rolling process of the flexible display screen 100 is reduced, so that the stability of rolling or unfolding of the flexible display screen 100 is improved.
It should be noted that, the first grooves 1211 are formed on the first supporting portions 121 corresponding to the two second non-display sub-areas S22 at the same time, so that the stress difference generated on the first supporting portions 121 corresponding to the two second non-display sub-areas S22 when the flexible display screen 100 is curled can be reduced, thereby helping to improve the stability of the flexible display screen 100 when curled.
In some embodiments, the first grooves 1211 on the first supporting portions 121 corresponding to the two second sub-non-display areas S22 are symmetrically disposed, and this structural design can minimize the stress difference generated on the first supporting portions 121 corresponding to the two second sub-non-display areas S22 when the flexible display screen 100 is curled, so as to further improve the stability of the flexible display screen 100 when curled.
Optionally, a side of the second supporting portion 122 facing away from the backlight surface 112 is provided with a plurality of second grooves 1221. The second supporting portion 122 is located in the display area S1 of the display screen main body 110, during the rolling process of the flexible display screen 100, the second supporting portion 122 and the display screen main body 110 are rolled or unfolded along the second direction Y, and by forming the second groove 1221 on the side of the second supporting portion 122 away from the backlight surface 112, the modulus of the second supporting portion 122 can be reduced, and the rolling flexibility of the second supporting portion 122 is improved, so that the normal rolling process of the flexible display screen 100 is facilitated.
In some embodiments, the second grooves 1221 extend along the first direction X, that is, the second grooves 1221 are aligned with the extending direction of the first grooves 1211, and the second grooves 1221 are configured to relieve the repulsive force generated by the second supporting portions 122 located on opposite sides of the second grooves 1221 when the flexible display screen 100 is rolled, so as to improve the stability of the flexible display screen 100 when rolled.
The second grooves 1221 are staggered in the second direction Y, so that the areas of the second supporting portion 122 where the second grooves 1221 are not formed can be uniformly distributed at the positions corresponding to the display area S1, which helps to ensure uniform support of the second supporting portion 122 on the display area S1 of the display screen main body 110, thereby improving the flatness of the light-emitting surface 111 of the display screen main body 110.
In other embodiments, the second grooves 1221 extend along the second direction Y, that is, the second grooves 1221 form an angle with the extending direction of the first grooves 1211, so that the extending direction of the second supporting portions 122 between two adjacent second grooves 1221 is consistent with the unfolding direction of the display main body 110, and the structural design is beneficial to improving the supporting effect of the second supporting portions 122 on the display main body 110 during the unfolding process of the display main body 110, thereby improving the flatness of the light-emitting surface 111 of the display main body 110.
The second grooves 1221 are staggered in the first direction X, so that the areas of the second supporting portion 122 where the second grooves 1221 are not formed can be uniformly distributed at the positions corresponding to the display area S1, which helps to ensure uniform support of the second supporting portion 122 on the display area S1 of the display screen main body 110, thereby further improving the flatness of the light-emitting surface 111 of the display screen main body 110.
Optionally, the second groove 1221 penetrates the second supporting portion 122 along the direction of the backlight surface 112 toward the light emitting surface 111, that is, the second supporting portion 122 forms a hollowed-out area at a position corresponding to the second groove 1221, and this structural design can further reduce the modulus of the second supporting portion 122, improve the curling flexibility of the second supporting portion 122, and thus facilitate the normal rolling process of the flexible display screen 100.
In some embodiments, the bottom of the second groove 1221 may also retain a portion of the second supporting portion 122, that is, the second supporting portion 122 is disposed on the whole surface of the display area S1 of the display screen main body 110, and the structural design manner can improve the supporting effect of the second supporting portion 122 on the display area S1 of the display screen main body 110, thereby improving the flatness of the light-emitting surface 111 of the display screen main body 110.
The shape of the edge of the second groove 1221 may be various regular or irregular shapes such as a circle, an ellipse, a triangle, or a diamond, and the specific shape thereof may be adjusted and designed according to the actual use requirement, which is not limited herein.
It should be noted that, when the extending direction of the second groove 1221 is consistent with the extending direction of the first groove 1211, the first groove 1211 located on the first supporting portion 121 of the second sub-non-display area S22 can be mutually communicated with the adjacent second groove 1221, and the structural design manner enables the first groove 1211 and the adjacent second groove 1221 located on the first supporting portion 121 of the second sub-non-display area S22 to be as a whole structure, thereby helping to simplify the manufacturing process of the supporting layer 120.
At this time, the first groove 1211 located on the first supporting portion 121 of the second sub-non-display area S22 can penetrate the first supporting portion 121 along the direction of the backlight surface 112 toward the light-emitting surface 111, so as to further improve the flexibility of the first supporting portion 121 at this position, thereby helping to perform the rolling process of the flexible display 100. Alternatively, the bottom of the first groove 1211 located on the first supporting portion 121 of the second sub-non-display area S22 still maintains a portion of the first supporting portion 121, that is, the first supporting portion 121 located on the second sub-non-display area S22 is disposed on the whole surface, so as to improve the supporting effect of the first supporting portion 121 on the second sub-non-display area S22 of the display screen main body 110, thereby improving the overall flatness of the light-emitting surface 111 of the display screen main body 110.
Optionally, in an embodiment of the present application, the thickness of the second supporting portion 122 is greater than or equal to 50 micrometers and less than or equal to 200 micrometers. If the thickness of the second supporting portion 122 is too small, the second supporting portion 122 cannot effectively support the display area S1 of the display screen main body 110, so that the overall flatness of the light emitting surface 111 of the display screen main body 110 is poor; if the thickness of the second supporting portion 122 is too large, the flexibility of the second supporting portion 122 is poor, which is not beneficial to the normal rolling process of the flexible display 100.
In the actual manufacturing process, the thickness of the second supporting portion 122 can be set to be 50 micrometers, 80 micrometers, 100 micrometers, 150 micrometers, 180 micrometers or 200 micrometers, which can ensure that the second supporting portion 122 can effectively support the display area S1 of the display screen main body 110, improve the overall flatness of the light emitting surface 111 of the display screen main body 110, and ensure that the second supporting portion 122 has enough flexibility so that the winding process of the flexible display screen 100 can be normally performed. The specific thickness of the second supporting portion 122 can be adjusted according to the actual design and the use requirement, which is not limited herein.
Optionally, the thickness of the first supporting portion 121 is greater than the thickness of the second supporting portion 122, and the difference between the thicknesses of the first supporting portion 121 and the second supporting portion 122 is greater than or equal to 300 micrometers and less than or equal to 500 micrometers. The thickness of the first supporting portion 121 is set to be greater than that of the second supporting portion 122, so that when the supporting layer 120 is attached to the backlight surface 112 of the display screen main body 110, the height of one side, opposite to the backlight surface 112, of the first supporting portion 121, which faces away from the backlight surface 112, is greater than that of one side, opposite to the backlight surface 112, of the second supporting portion 122, which faces away from the backlight surface 112, so that the supporting layer 120 supports the whole surface of the display screen main body 110, and the flatness of the light-emitting surface 111 of the display screen main body 110 is improved.
If the difference between the thicknesses of the first supporting portion 121 and the second supporting portion 122 is too large, the thickness of the second supporting portion 122 is too small, which is not beneficial to the supporting of the second supporting portion 122 on the display area S1 of the display screen main body 110, or the thickness of the first supporting portion 121 is too large, which is not beneficial to the curling of the first supporting portion 121 and the display screen main body 110 together; if the difference between the thicknesses of the first supporting portion 121 and the second supporting portion 122 is too small, the first supporting portion 121 cannot effectively isolate the display area S1 of the two adjacent turns of the display screen main body 110, so that the display area S1 is damaged due to mutual friction, and the display quality of the flexible display screen 100 is affected.
In the actual manufacturing process, the difference between the thicknesses of the first supporting portion 121 and the second supporting portion 122 can be set to 300 micrometers, 350 micrometers, 400 micrometers, 450 micrometers or 500 micrometers, so that not only can the supporting layer 120 effectively support the display screen main body 110 and smooth progress of the curling process be ensured, but also the first supporting portion 121 can effectively isolate the display area S1 of two adjacent circles of display screen main bodies 110. The specific difference between the thicknesses of the first supporting portion 121 and the second supporting portion 122 can be adjusted according to the actual design and the use requirement, which is not limited herein.
Optionally, the flexible display 100 further includes a circuit board 130, where the circuit board 130 is located on one side of the display main body 110, and the circuit board 130 is electrically connected to the display main body 110, so as to control a display mode of the display main body 110, so as to meet different display requirements of the flexible display 100.
In addition, the embodiment of the present application further provides a display device, where the display device includes a flexible display screen, and the specific structure of the flexible display screen refers to the foregoing embodiments, and since the display device adopts all the technical solutions of all the foregoing embodiments, at least the display device has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described herein in detail.
As shown in fig. 6 and 7, the display device 10 includes a flexible display 100 and a reel 200, one side of the flexible display 100 is connected to the reel 200, and the reel 200 is used to unwind or wind up the flexible display 100. When the flexible display screen 100 needs to be put into use, the scroll 200 drives the flexible display screen 100 to be unfolded from the scroll 200, and in the unfolding process, the support layer 120 in the flexible display screen 100 supports the display screen main body 110 so as to resist bending deformation of the display screen main body 110, so that the display screen main body 110 presents better flatness after being unfolded; after the flexible display screen 100 is used, the reel 200 drives the flexible display screen 100 to wind onto the reel 200, and in the winding process, the supporting layer 120 in the flexible display screen 100 and the display screen main body 110 are curled together, and meanwhile, the supporting layer 120 can separate the display areas S1 of two adjacent circles of display screen main bodies 110, so as to avoid damage to the display areas S1 of two adjacent circles of display screen main bodies 110 due to mutual friction, thereby affecting the display quality of the flexible display screen 100.
When the flexible display 100 is connected to the reel 200, the position of the light-emitting surface 111 of the display main body 110 corresponding to the non-display area S2 can be adhered to the reel 200, and the connection stability of the flexible display 100 and the reel 200 can be improved due to the flat light-emitting surface 111 of the display main body 110, so that the smooth process of winding and unwinding the flexible display 100 is facilitated.
Or, when the flexible display screen 100 is connected with the reel 200, one side of the supporting layer 120, which is away from the display screen main body 110, can be adhered to the reel 200, and the connection mode is such that when the flexible display screen 100 is curled, the supporting layer 120 can separate the display screen main body 110 from the reel 200, so that the light-emitting surface 111 of the display screen main body 110 cannot directly contact with the reel 200, thereby avoiding damage to the display screen main body 110 due to mutual friction with the reel 200, and further being beneficial to improving the display quality of the flexible display screen 100.
Finally, an embodiment of the present application further provides a method for manufacturing a flexible display screen, as shown in fig. 8, where the method for manufacturing a flexible display screen includes the following steps:
s100, providing a display screen main body 110, wherein the display screen main body 110 is provided with a light emitting surface 111 and a backlight surface 112 which are oppositely arranged, and the display screen main body 110 comprises a display area S1 and a non-display area S2.
In manufacturing the flexible display 100, the display main body 110 needs to be manufactured first, where the display main body 110 has a light emitting surface 111 and a backlight surface 112 that are disposed opposite to each other, and the light emitting surface 111 is a display surface of the flexible display 100. When the flexible display screen 100 is manufactured, the flexible display screen 100 comprises a display area S1 and a non-display area S2, wherein the non-display area S2 is mainly used for forming a driving circuit so as to regulate and control the display mode of the display area S1; the display area S1 is a main functional area of the flexible display screen 100, and its performance directly affects the display quality of the flexible display screen 100.
Specifically, as shown in fig. 1 and fig. 2, when the display main body 110 is manufactured, a flexible substrate 113 is provided, then a device layer 114, a light emitting layer 115, a packaging layer 116 and a polarizer 117 are sequentially formed on the flexible substrate 113, wherein a side of the flexible substrate 113 is a backlight surface 112 of the display main body 110, and a side of the polarizer 117 is a light emitting surface 111 of the display main body 110. The flexible substrate 113 is used for supporting other film structures in the display screen main body 110, and the device layer 114 includes a switch control structure for controlling the light emitting mode of the light emitting layer 115; the packaging layer 116 is used for packaging and protecting the light emitting layer 115 and the device layer 114 to prevent water vapor or oxygen in the external environment from corroding the inside of the display main body 110, and the polarizer 117 is used for adjusting the emergent light of the light emitting layer 115 to improve the display effect of the display main body 110.
S200, providing a supporting layer 120, and patterning the supporting layer 120 to form a first supporting portion 121 and a second supporting portion 122, where the first supporting portion 121 corresponds to the non-display area S2, and the second supporting portion 122 corresponds to the display area S1.
When the display screen main body 110 is formed, the fabrication of the support layer 120 can be performed simultaneously, that is, the fabrication processes of the support layer 120 and the display screen main body 110 can be independent to each other, so as to save the fabrication time of the flexible display screen 100. The supporting layer 120 can be a metal film, and its material includes, but is not limited to, one of stainless steel, copper alloy, or invar alloy.
As shown in fig. 3 to 5, when the supporting layer 120 is manufactured, the supporting layer 120 needs to be patterned to form the first supporting portion 121 and the second supporting portion 122 with different thicknesses, the first supporting portion 121 formed after patterning corresponds to the non-display area S2, and the second supporting portion 122 corresponds to the display area S1, so as to support the non-display area S2 and the display area S1 respectively, so as to ensure the flatness of the display screen main body 110 when being unfolded.
It should be noted that, when the supporting layer 120 is patterned, only one side of the supporting layer 120 may be processed, so that the other side of the supporting layer 120 is a flat surface, and the flat surface is used as an attaching surface for attaching to the display screen main body 110, so as to ensure the connection stability between the supporting layer 120 and the display screen main body 110, and further help to improve the flatness of the light-emitting surface 111 of the display screen main body 110.
And S300, attaching the support layer 120 to the backlight surface 112 of the display screen main body 110, wherein the maximum value of the height of one side of the first support part 121, which is away from the backlight surface 112, relative to the backlight surface 112 is greater than the maximum value of the height of one side of the second support part 122, which is away from the backlight surface 112, relative to the backlight surface 112.
After the display main body 110 and the support layer 120 are manufactured, the support layer 120 and the display main body 110 need to be bonded. When in bonding, the adhesive layer can be coated on the supporting layer 120, and then the supporting layer 120 is attached on the backlight surface 112 of the display screen main body 110, so that the supporting layer 120 can support the display screen main body 110 and simultaneously can not interfere with the display of the display screen main body 110.
After the attachment, the maximum value of the height of the side, facing away from the backlight surface 112, of the first support portion 121 relative to the backlight surface 112 is greater than the maximum value of the height of the side, facing away from the backlight surface 112, of the second support portion 122 relative to the backlight surface 112, that is, the first support portion 121 protrudes from the second support portion 122 relative to the backlight surface 112 of the display screen main body 110. Because the first supporting portion 121 is located in the non-display area S2, and the second supporting portion 122 is located in the display area S1, when the display screen main body 110 is curled, the first supporting portion 121 can support two adjacent turns of the display screen main body 110, so that the display areas S1 of the two adjacent turns of the display screen main body 110 are separated, and damage to the display areas S1 of the two adjacent turns of the display screen main body 110 due to mutual friction in the winding or unwinding process of the flexible display screen 100 is avoided, so that the overall display effect of the flexible display screen 100 is ensured.
Alternatively, in the patterning process of the support layer 120 in step S200, different target patterns can be formed through an etching process. First, a film mask is fabricated according to the region division of the first and second support parts 121 and 122 and the design of the respective patterns, and then a target pattern is etched on the support layer 120 using an acid etching process. The thickness after etching can be controlled by etching time, and if the thickness after etching is thinner, the time required by etching is longer; if the initial film thickness of a part of the area needs to be kept unchanged during etching, the area corresponds to a non-reaction area in the film photomask and does not participate in acid washing etching reaction.
In some embodiments, a side of the first supporting portion 121 facing away from the backlight surface 112 is provided with a plurality of first grooves 1211. When the flexible display 100 is curled, a portion of the non-display area S2 of the flexible display 100 needs to be connected to the winding structure, and at the same time, the first supporting portion 121 located in the non-display area S2 needs to be wound or unwound together with the display main body 110. By providing the plurality of first grooves 1211 on the side of the first supporting portion 121 away from the backlight surface 112, the rigidity of the first supporting portion 121 can be reduced, and the flexibility of the first supporting portion 121 is improved, so that the rebound force between flat curved bonding surfaces is reduced, and the stable rolling and unfolding of the flexible display screen 100 are ensured.
The first grooves 1211 extend along the first direction X, and the plurality of first grooves 1211 are disposed at intervals along the second direction Y, and the first direction X forms an included angle with the second direction Y. In the embodiment of the present application, the winding or unwinding direction of the flexible display screen 100 is defined as a second direction Y, and a direction perpendicular to the second direction Y is defined as a first direction X. The provision of the first grooves 1211 can alleviate the repulsive force of the first support parts 121 located at opposite sides of the first grooves 1211 during the curling of the flexible display screen 100, thereby improving the stability of the flexible display screen 100 when it is rolled up.
In other embodiments, a side of the second supporting portion 122 facing away from the backlight surface 112 is provided with a plurality of second grooves 1221. The second supporting portion 122 is located in the display area S1 of the display screen main body 110, during the rolling process of the flexible display screen 100, the second supporting portion 122 and the display screen main body 110 are rolled or unfolded along the second direction Y, and by forming the second groove 1221 on the side of the second supporting portion 122 away from the backlight surface 112, the modulus of the second supporting portion 122 can be reduced, and the rolling flexibility of the second supporting portion 122 is improved, so that the normal rolling process of the flexible display screen 100 is facilitated.
The second groove 1221 can penetrate the second supporting portion 122 along the direction of the backlight surface 112 toward the light emitting surface 111, that is, the second supporting portion 122 forms a hollowed-out area at a position corresponding to the second groove 1221, and the structural design can further reduce the modulus of the second supporting portion 122 and improve the curling flexibility of the second supporting portion 122, so as to facilitate the normal rolling process of the flexible display screen 100.
It should be noted that, when patterning the support layer 120, the maximum thickness of the first support portion 121 can be kept identical to the initial thickness of the support layer 120, the thickness of the first support portion 121 at the position corresponding to the first groove 1211 is identical to the maximum thickness of the second support portion 122, and the thickness of the second support portion 122 at the position corresponding to the second groove 1221 is the thinnest area of the support layer 120. The structure design makes only two etching times needed to pattern the support layer 120, the first support portion 121 does not need to be etched except the area where the first groove 1211 is located, the etching time of the area where the second groove 1221 is located is longest, and the etching time of the area where the second groove 1221 is located on the second support portion 122 is identical to the etching time of the area where the first groove 1211 is located, thereby being beneficial to simplifying the process procedure of the support layer 120.
The specific structural designs of the first supporting portion 121 and the second supporting portion 122 and the thickness values corresponding to the respective regions can be adjusted accordingly according to the actual use requirements, and the corresponding etching process is also adjusted accordingly, which is not limited in particular herein.
The flexible display screen, the display device and the manufacturing method of the flexible display screen provided by the embodiment of the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (9)
1. A flexible display screen, comprising:
the display screen comprises a display screen main body, a display screen display module and a display screen display module, wherein the display screen main body is provided with a light-emitting surface and a backlight surface which are oppositely arranged, and the display screen main body comprises a display area and a non-display area;
the support layer is attached to the backlight surface of the display screen main body, the support layer comprises a first support part positioned in the non-display area and a second support part positioned in the display area, and the maximum value of the height of one side, away from the backlight surface, of the first support part relative to the backlight surface is larger than the maximum value of the height of one side, away from the backlight surface, of the second support part relative to the backlight surface;
the backlight module comprises a backlight surface, a first supporting part, a second supporting part, a plurality of first grooves, a plurality of second grooves and a plurality of first grooves, wherein the first grooves are formed in one side of the first supporting part, which is away from the backlight surface, and extend along a first direction, the first grooves are arranged at intervals along a second direction, and an included angle is formed between the first direction and the second direction.
2. The flexible display screen according to claim 1, wherein the non-display area includes two first sub-non-display areas distributed on opposite sides of the display area along the second direction, and the first groove is formed on the first supporting portion corresponding to at least one of the first sub-non-display areas.
3. The flexible display screen according to claim 1, wherein the non-display area includes two second sub-non-display areas distributed on opposite sides of the display area along the first direction, and the first grooves are formed in the first supporting portions corresponding to the two second sub-non-display areas.
4. A flexible display screen according to claim 1, wherein a side of the second support portion facing away from the backlight surface is provided with a plurality of second grooves.
5. A flexible display screen according to claim 4, wherein the second grooves extend in the first direction, the second grooves being staggered in the second direction; or alternatively, the first and second heat exchangers may be,
the second grooves extend along the second direction, and the second grooves are staggered in the first direction.
6. A flexible display screen according to claim 4 or 5, wherein the second recess extends through the second support portion in a direction of the backlight surface towards the light exit surface.
7. The flexible display screen of claim 1, wherein the thickness of the second support is greater than or equal to 50 microns and less than or equal to 200 microns; the thickness of the first supporting part is larger than that of the second supporting part, and the difference between the thicknesses of the first supporting part and the second supporting part is larger than or equal to 300 micrometers and smaller than or equal to 500 micrometers.
8. A display device comprising the flexible display screen of any one of claims 1 to 7 and a reel, one side of the flexible display screen being connected to the reel, the reel being for unwinding or winding the flexible display screen.
9. A method for manufacturing a flexible display screen, the method comprising:
providing a display screen main body, wherein the display screen main body is provided with a light-emitting surface and a backlight surface which are oppositely arranged, and the display screen main body comprises a display area and a non-display area;
providing a supporting layer, and carrying out patterning treatment on the supporting layer to form a first supporting part and a second supporting part, wherein the first supporting part corresponds to the non-display area, and the second supporting part corresponds to the display area;
attaching the support layer to a backlight surface of the display screen main body, so that the maximum value of the height of one side, away from the backlight surface, of the first support part relative to the backlight surface is larger than the maximum value of the height of one side, away from the backlight surface, of the second support part relative to the backlight surface; the backlight module comprises a backlight surface, a first supporting part, a second supporting part, a plurality of first grooves, a plurality of second grooves and a plurality of first grooves, wherein the first grooves are formed in one side of the first supporting part, which is away from the backlight surface, and extend along a first direction, the first grooves are arranged at intervals along a second direction, and an included angle is formed between the first direction and the second direction.
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