CN113380139A - Spliced screen body - Google Patents

Spliced screen body Download PDF

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Publication number
CN113380139A
CN113380139A CN202110397890.4A CN202110397890A CN113380139A CN 113380139 A CN113380139 A CN 113380139A CN 202110397890 A CN202110397890 A CN 202110397890A CN 113380139 A CN113380139 A CN 113380139A
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China
Prior art keywords
screen body
splicing
spliced
substrate
screen
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Granted
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CN202110397890.4A
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CN113380139B (en
Inventor
康建喜
朱映光
张国辉
许显斌
胡永岚
陈旭
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Guan Yeolight Technology Co Ltd
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Guan Yeolight Technology Co Ltd
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Publication of CN113380139A publication Critical patent/CN113380139A/en
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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
    • 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
    • G09F9/302—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 characterised by the form or geometrical disposition of the individual elements
    • G09F9/3023—Segmented electronic displays
    • 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
    • G09F9/33—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 being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The application discloses a spliced screen body, which comprises a substrate and a plurality of OLED screen bodies spliced on the substrate; the OLED screen body is fixed on the substrate in an adhesive manner; the substrate is provided with a splicing structure and/or a stress release structure; the splicing structure is used for preventing the screen body from being damaged due to the fact that the local curvature radius is too small when the screen body is spliced; the stress release structure is used for releasing the stress between the OLED screen body and the substrate when the screen body is bent, so that a large-size spliced screen body can be formed by splicing a plurality of small-size OLED screen bodies, the large-size spliced screen body meets the light-emitting uniformity, the reliability of the large-size spliced screen body is improved, and the problem of separation between the screen body and the substrate caused by stress release when the screen body is bent is solved.

Description

Spliced screen body
Technical Field
The present disclosure generally relates to the field of OLED devices, and more particularly, to a tiled screen body.
Background
An OLED is a photoelectric device that emits light by carrier injection and recombination. The specific process is that electrons are injected through a metal cathode and are transmitted to a light-emitting layer through an electron transmission material, holes are injected through a metal anode and are transmitted to the light-emitting layer through a hole transmission material, the electrons and the holes are combined in the light-emitting layer to form excitons, and the excitons return to the ground state through light emission. The OLED has the characteristics of good light emitting uniformity, lightness, thinness, flexibility, stretchability and the like, and is concerned.
With the continuous development of the OLED, the OLED is applied more and more widely, and simultaneously, the requirement for the OLED is higher and higher, for example, the OLED screen body with large size. However, the large-size OLED screen face faces two problems, namely, poor light-emitting uniformity, low yield and difficulty in correspondence of small lines; the best method for solving the two problems is to splice the small-size screen bodies into the large-size screen body.
Photomedicine is one of the important applications for flexible OLEDs. High brightness, high uniformity and large size are the main requirements of large-area photomedical, however, the large size of the OLED screen body is difficult to realize high brightness and high uniformity. When the uniformity of the highlight is poor, the highlight part of the screen body is easy to generate heat seriously and even burn, and the screen body is not beneficial to phototherapy. One of the current solutions is to splice together small size OLED screens.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a reliable tiled screen body.
In a first aspect, the present application provides a spliced screen body, including a substrate and a plurality of OLED screen bodies spliced on the substrate; the OLED screen body is fixed on the substrate in an adhesive manner; the substrate is provided with a splicing structure and/or a stress release structure;
the splicing structure is used for preventing the screen body from being damaged due to the fact that the local curvature radius is too small when the screen body is spliced;
the stress release structure is used for releasing stress between the OLED screen body and the substrate when the screen body is bent.
According to the technical scheme provided by the embodiment of the application, the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the splicing structure is a slope bulge arranged at the splicing position of the substrates; the splicing side of the first screen body is adjacent to the thicker side of the slope protrusion; the splicing side of the second screen body is attached to the slope protrusion, and then the non-luminous area of the splicing side of the first screen body is covered.
According to the technical scheme provided by the embodiment of the application, the slope protrusion is made of at least one material of PMMA, PET, PE, epoxy resin, polyolefin and PI.
According to the technical scheme provided by the embodiment of the application, the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the splicing structure is a triangular groove arranged at the splicing position of the substrates; the splicing side of the first screen body extends into the triangular groove; the spliced side of the second screen body covers the non-luminous area of the spliced side of the first screen body; and a filling material for filling the triangular groove is arranged above the splicing side of the first screen body.
According to the technical scheme provided by the embodiment of the application, the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the stress release structure is a splicing gap arranged on the substrate, and the splicing gap is arranged corresponding to a splicing position; and the splicing sides of the first screen body and the second screen body are inserted into the splicing gap.
According to the technical scheme provided by the embodiment of the application, the slope of the slope protrusion or the angle between the triangular groove and the horizontal direction of the substrate is more than 0 degree and less than 90 degrees, and preferably 0-45 degrees
According to the technical scheme provided by the embodiment of the application, the substrate sequentially comprises an upper insulating layer, a conducting layer and a lower insulating layer from top to bottom; the stress release structure is a slit formed in the upper insulating layer and/or the lower insulating layer; the slit is arranged along the length direction or the width direction of the substrate; the width scope of slit is 1um-50um, and the interval between the adjacent slit is 0.5mm-20 mm.
According to the technical scheme provided by the embodiment of the application, the stress release structures are a plurality of through holes formed in the substrate; the distance between the through holes is 0.5mm-20 mm; the area of the through hole is 0.01mm2To 100mm2。
According to the technical scheme provided by the embodiment of the application, an upper routing area is arranged at the head of the OLED screen body, and a lower routing area is arranged on the substrate corresponding to the upper routing area; the upper routing area is provided with an FPC for electric connection, and the lower routing area is used for electric connection with the FPC; thickness H of the lower bonding regionLower partThe following formula is satisfied:
Hlower part＝HScreen (B)-HOn the upper part-Hfpc；
Wherein HLower partIs the thickness of the lower boarding region; hScreen (B)The thickness of the OLED screen body; hOn the upper partIs the thickness of the upper boarding region; hfpcIs the thickness of the lower FPC.
According to the technical scheme that this application embodiment provided, the OLED screen body with it is fixed through the viscose between the base plate, the viscose is at least one in epoxy, Polyurethane (PU), amino resin, phenolic resin, acrylic resin, polyacrylate, the rubber.
The splicing structure and/or the stress release structure are/is designed on the substrate of the splicing screen body; the splicing structure is used for preventing the screen body from being damaged due to the fact that the local curvature radius is too small when the screen body is spliced; the stress release structure is used for releasing stress between the OLED screen body and the substrate when the screen body is bent so as to reduce damage of the screen body. Due to the design of the splicing structure and/or the stress release structure, the damage of the spliced screen body is effectively reduced, the problem of separation between the screen body and the substrate caused by stress release when the screen body is bent is solved, and the reliability of the large-size spliced screen body is improved, so that the large-size screen body can be formed by splicing a plurality of small-size OLED screen bodies, and the large-size spliced screen body can meet the light-emitting uniformity.
According to the technical scheme provided by the embodiment of the application, the splicing structures such as the slope bulge and the triangular groove are designed on the substrate, so that the problem that the screen body is damaged due to the fact that the local curvature radius is too small when the screen body is spliced is effectively solved;
according to the technical scheme provided by the embodiment of the application, stress of the screen body is effectively released when the screen body is bent by designing stress release structures such as splicing gaps or slits or through holes on the substrate, and particularly, when the slits are arranged along the length and the width directions of the substrate, the requirement of multi-dimensional bending of the screen body can be met.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic top view of the structure of example 1;
FIG. 2 is a schematic structural diagram of a first embodiment of an OLED panel in example 1;
FIG. 3 is a schematic structural diagram of a second embodiment of the OLED panel in example 1;
FIG. 4 is a schematic view of the structure of a substrate in example 1;
FIG. 5 is a schematic sectional view showing the structure of example 1;
FIG. 6 is a schematic sectional view showing the structure of embodiment 2;
FIG. 7 is a schematic view of the structure of a substrate in example 3;
FIG. 8 is a schematic sectional view showing the structure of embodiment 3;
FIG. 9a is a schematic cross-sectional view of a substrate according to a first embodiment of example 4;
FIG. 9b is a schematic cross-sectional view of a second embodiment of the substrate of example 4;
FIG. 9c is a schematic cross-sectional view of a substrate according to a third embodiment of example 4;
FIG. 9d is a schematic cross-sectional view of a fourth embodiment of the substrate of example 4;
FIG. 10a is a schematic cross-sectional view of a fifth embodiment of the substrate of example 4;
FIG. 10b is a schematic cross-sectional view of a substrate according to a sixth embodiment of example 4;
FIG. 10c is a schematic cross-sectional view of a substrate according to a seventh embodiment of example 4;
FIG. 11a is a schematic cross-sectional view of a substrate according to a first embodiment of example 5;
FIG. 11b is a schematic cross-sectional view of a second embodiment of the substrate of example 5;
FIG. 12 is a schematic structural view of another embodiment of a tiled screen body;
reference numeral 10 in the figure, a substrate; 11. a circuit lead; 20. an OLED screen body; 21. a first screen body; 22. a second screen body 23, a light emitting region; 24. a non-light emitting region; 30a, an upper boarding area; 25. FPC; 30b, a lower boarding area; 41. a ramp protrusion; 42. a triangular groove; 43. Splicing gaps; 44. a slit; 13. a conductive layer; 12. an upper insulating layer; 14. a lower insulating layer; 45. and a through hole.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Referring to fig. 1, the present embodiment provides a tiled display panel, which includes a substrate 10 and a plurality of OLED display panels 20 tiled on the substrate 10; the OLED screen body 20 is fixed on the substrate 10 in an adhesive manner; the substrate is provided with a splicing structure; the splicing structure is used for preventing the screen body from being damaged due to the fact that the local curvature radius is too small when the screen body is spliced. In this embodiment, the OLED screen 20 is a flexible OLED screen.
The substrate 10 may be made of at least one of flexible metal and plastic.
The adhesive between the OLED panel 20 and the substrate 10 is made of any one of epoxy resin, Polyurethane (PU), amino resin, phenolic resin, acrylic resin, polyacrylate, and rubber, or a mixture of at least two of the above.
The specific implementation manner of the splicing structure in this embodiment is as follows:
as shown in fig. 4 and 5, the tiled OLED is formed by splicing a plurality of first screen bodies 21 and second screen bodies 22; the splicing structure is a slope bulge 41 arranged at the splicing position of the substrates; the spliced side of the first screen body 21 is adjacent to the relatively thicker side of the ramped protrusion 41; the splicing side of the second screen body 22 is attached to the slope protrusion 41, and then covers the non-light emitting region (shown by the shaded part in fig. 5) of the splicing side of the first screen body 21.
As shown in fig. 1, the present embodiment is applied to a screen body spliced end to end, where the spliced OLED screen body 20 is formed by splicing a plurality of first screen bodies 21 and second screen bodies 22 end to end;
the first screen body 21 and the second screen body 22 are both flexible OLED screen bodies, and the head of each OLED screen body refers to an electric connection part of each OLED screen body. As shown in fig. 2, the OLED panel 20 is provided with a light emitting region 23 and a non-light emitting region 24 (shown as a shaded portion in fig. 2), as shown in fig. 2, the non-light emitting region 24 may be provided with an upper bonding region 30a for electrical connection, the substrate 10 is also correspondingly provided with a lower bonding region 30b, and when the non-light emitting region 24 is electrically connected to the substrate 10, the non-light emitting region is directly welded together through the upper bonding region 30a and the lower bonding region 30 b; or as shown in fig. 3, the upper mounting region 30a of the non-light emitting region 24 may be provided with an FPC25 for electrical connection, and an FPC25 is electrically connected with the lower mounting region 30 b; the substrate 10 is used for carrying all the OLED panels 20 on one hand and providing circuit leads for the OLED panels 20 on the other hand, as shown in fig. 5, the FPC25 or the upper bending region 30a of the OLED panel 20 is electrically connected with the circuit leads 11 on the substrate 10 through the lower bending region 30 b; therefore, the lower bending region 30b on the substrate 10 is a region where the substrate 10 is electrically connected to the FPC25 or the upper bending region 30a of the OLED panel 20. As shown in fig. 2 and 3, the other side of the OLED panel 20 opposite to the side provided with the upper mounting region 30a is a tail.
When the OLED screen body passes through the FPC and the substrate mounting, the OLED screen body and the FPC25 can be in compression joint through ultrasonic welding or a press.
In this embodiment, the substrate 10 is electrically connected to the head of the first screen 21 to form a lower mounting region 30 b; as shown in fig. 4, the splicing structure is a slope protrusion 41 disposed on one side of the lower routing region 30 b; the lower bolting zone 30b is adjacent to the relatively thicker side of the ramped protrusion 41;
as shown in fig. 5, the tail of the second screen 22 is attached to the non-light emitting area 24 covering the head of the first screen 21 after the slope protrusion 41.
Wherein, the slope protrusion is made of at least one of PMMA, PET, PE, epoxy resin, polyolefin and PI.
Wherein the slope of the ramp protrusion is greater than 0 ° and less than 90 °, preferably 0 ° to 45 °, and in the present embodiment, the angle of the ramp protrusion is 10 °.
The head of the first screen body is provided with an upper routing area 30a, the upper routing area 30a is provided with an FPC25 for electric connection, and the lower routing area 30b of the substrate is used for being electrically connected with an FPC 25; the thickness H of the lower bonding region 30b satisfies the following formula:
Hlower part＝HScreen (B)-HOn the upper part-Hfpc；
Wherein HLower partIs the thickness of the lower boarding region; hScreen (B)The thickness of the OLED screen body; hOn the upper partIs the thickness of the upper boarding region; hfpcIs the thickness of the FPC. The total thickness of the upper and lower mounting regions 30a and 30b and FPC25 and the thickness H of the screen bodyScreen (B)When the splicing is consistent, the flatness of the splicing screen body in the horizontal direction can be ensured during splicing.
In this embodiment, because the setting of the protruding 41 of slope, make the second screen body 22 lie in the time of base plate 10 connection, gently rise, the crookedness of the second screen body 22 has been reduced, for the direct overlap joint mosaic structure on the first screen body of afterbody of the second screen body, the damage that the second screen body produced when the concatenation has been avoided, in addition, because the design of the protruding structure of slope, also make the screen body crooked time, stress between the OLED screen body and the base plate can be released along with the domatic of slope, thereby also reduced the separation between the screen body that stress release when the screen body is crooked leads to and the base plate.
In a preferred mode of this embodiment, the splicing structure further includes a plurality of through holes or slits formed in the substrate 10, and the through holes or slits are disposed corresponding to the lower bonding region 30 b. That is, a hole or a slit is formed at the left side of the slope protrusion 41 of the substrate 10, the first screen body 21 is first attached to the left side of the slope protrusion, and the upper bending region 30a of the first screen body 21 or the FPC25 for bending is placed at the through hole or the slit. The through holes or slits may further relieve stress between the OLED screen 20 and the substrate 10.
In other embodiments, the splicing structure in this embodiment can also be used for a side-spliced OLED panel.
Example 2
On the basis of embodiment 1, in the spliced screen body provided in this embodiment, the splicing structure on the substrate is changed to a triangular groove, which is specifically as follows:
the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the splicing structure is a triangular groove arranged at the splicing position of the substrates; the splicing side of the first screen body extends into the triangular groove; the spliced side of the second screen body covers the non-luminous area of the spliced side of the first screen body.
As shown in fig. 6, the spliced OLED20 in this embodiment is formed by splicing a plurality of first screen bodies 21 and second screen bodies 22 end to end; the substrate 10 is electrically connected with the head part of the first screen body 21 to form a lower mounting region 30 b; the stress release structure is a triangular groove 42 formed by the substrate in the lower mounting region 30 b;
the head part of the first screen body 21 extends into the triangular groove 42, and the tail part of the second screen body 22 covers the non-luminous area at the head part of the first screen body 21.
In this embodiment, through design triangle-shaped recess 42, make the prelude of the first screen body 21 attached along the inclined plane of triangle-shaped recess 42, the gentle decline, the crookedness of the first screen body 21 has been reduced, for the direct overlap joint mosaic structure on the first screen body of afterbody of the second screen body, the damage that the second screen body produced when the concatenation has been avoided, in addition, because the design of triangle-shaped recess 42, also when making the screen body crooked, stress between the OLED screen body and the base plate can be released along with the inclined plane of triangle-shaped recess 42, thereby also reduced the separation between the screen body that stress release when the screen body is crooked leads to and the base plate.
The angle between the triangular groove 42 and the horizontal direction of the substrate 10 is greater than 0 ° and less than 90 °, preferably 0 ° to 45 °, and in the present embodiment, the angle between the triangular groove 42 and the horizontal direction of the substrate 10 is 10 °.
In a preferred mode of the present embodiment, a filling material for filling the triangular groove 42 is disposed above the head portion of the first screen body 21. The filling material may be, for example, glue or solid adhesive tape.
In other embodiments, the splicing structure in this embodiment can also be used for a side-spliced OLED panel.
In a preferred manner of this embodiment, the stress relief structure further includes a plurality of through holes or slits formed in the substrate 10, and the through holes or slits are disposed corresponding to the lower bonding region 30 b. That is, holes or slits are punched in the slopes of the triangular grooves 42 of the base plate 10. The through holes or slits may further relieve stress between the OLED screen 20 and the substrate 10.
In the above embodiments 1 to 2, the splicing structure has not only the splicing function but also the stress release function.
Example 3
On the basis of embodiment 1, in the spliced screen body provided in this embodiment, a spliced structure and/or a stress release structure is/are provided on the substrate; the stress release structure is used for releasing stress between the OLED screen body and the substrate when the screen body is bent.
The stress release structure on the substrate 10 is a splicing gap 43, and is used for releasing stress between the OLED panel 20 and the substrate 10 when the panel is bent. The method comprises the following specific steps:
as shown in fig. 7 and fig. 8, in this embodiment, the tiled OLED is formed by splicing a plurality of first panels 21 and second panels 22 end to end; the stress release structure is a splicing gap 43 arranged on the substrate 10, and the splicing gap 43 is arranged corresponding to a splicing position; the head of the first screen body 21 penetrates into the splicing gap 43 and then is bent or welded on the back of the substrate 10 or a power supply FPC; the tail of the second screen 22 is inserted into the splice gap 43.
When the front part of the first screen body 21 penetrates into the splicing gap 43 and then is ganged or welded on the back surface of the substrate 10, the lower ganging region 30b of the substrate 10 is arranged on the back surface of the substrate.
When the framing is on the power supply FPC after the head of the first screen 21 penetrates into the splicing gap 43, the lower framing region 30b is not disposed on the back surface of the substrate 10.
In this embodiment, on one hand, the stress between the substrate 10 and the OLED panel is released through the splicing gap 43, and on the other hand, the tail portion of the second panel 22 is inserted into the splicing gap 43, so that the first panel 21 and the second panel 22 can be completely connected at the splicing position to form the light emitting area, and the continuity of the spliced display is further improved.
In other embodiments, the splicing structure in this embodiment can also be used for a side-spliced OLED panel.
In this embodiment, the stress relief structure has not only a stress relief function but also a splicing function.
Example 4
On the basis of embodiment 3, in the spliced screen body provided in this embodiment, the stress relief structure on the substrate 10 is changed to be the slit 44, which is specifically as follows:
in this embodiment, the substrate 10 includes, from top to bottom, an upper insulating layer 12, a conductive layer 13, and a lower insulating layer 14; the stress release structure comprises a slit 44 arranged on the upper insulating layer and/or the lower insulating layer; the slits 44 are arranged corresponding to the mounting positions of the OLED panel and the substrate. The circuit lead 11 is led out from the conductive layer 13.
Wherein the depth of the slit 44 is between 0.25 and 0.5 of the thickness of the entire substrate 10.
The implementation manner of the slit 44 in the vertical direction can optionally select any one of the following:
mode 1: as shown in fig. 9a, only the upper insulating layer 12 is provided.
Mode 2: as shown in fig. 9b, only the lower insulating layer 14 is provided.
Mode 3: as shown in fig. 9c, the upper insulating layer 12 and the lower insulating layer 14 are simultaneously disposed, and the upper and lower slits 44 are aligned.
Mode 4: as shown in fig. 9d, the upper insulating layer 12 and the lower insulating layer 14 are provided at the same time, and the upper and lower slits 44 are arranged in a staggered manner.
The implementation manner of the slit 44 in the horizontal direction can optionally select any one of the following:
mode 5 As shown in FIG. 10a, the substrate is arranged in the width direction of the substrate;
mode 6 As shown in FIG. 10b, the substrate is arranged in the longitudinal direction of the substrate;
mode 7, as shown in FIG. 10c, the substrates are arranged in both the longitudinal direction and the width direction of the substrates; at the moment, the reticular slits can be formed on the substrate, so that the spliced screen body can realize multi-dimensional bending, and the method is particularly suitable for occasions needing multi-dimensional bending, such as the field of optical medical treatment.
In a preferred mode of this embodiment, the width of the slits is 1um to 50um, and the distance between adjacent slits is 0.5mm to 20 mm.
Example 5
On the basis of embodiment 3, in the spliced screen body provided in this embodiment, the stress relief structure on the substrate 10 is changed to be the through hole 45, which is specifically as follows:
as shown in fig. 11a and 11b, the stress releasing structure further includes a plurality of through holes 45 formed on the substrate 10, and the through holes are disposed corresponding to the mounting positions of the OLED panel 20 and the substrate 10.
In a preferred mode of the embodiment, the distance between the through holes is 0.5mm-20 mm; the area of the through hole is 0.01mm2To 100mm2. The shape of the through hole 45 may be oval or square, or other shapes.
Other embodiments
The splice structures and stress relief structures of the above embodiments may be variously combined, for example:
1. the spliced screen body is provided with the spliced structure of the embodiment 1 and the stress release structure of the embodiment 4;
2. the spliced screen body is provided with the spliced structure of the embodiment 1 and the stress release structure of the embodiment 5;
3. the spliced screen body is provided with the spliced structure of the embodiment 2 and the stress release structure of the embodiment 4;
4. the spliced screen body is provided with the spliced structure of the embodiment 2 and the stress release structure of the embodiment 5;
5. the spliced screen body is provided with the spliced structure of the embodiment 3 and the stress release structure of the embodiment 4;
6. the spliced screen body is provided with the spliced structure of the embodiment 3 and the stress release structure of the embodiment 5;
the spliced screen body with the splicing and stress release functional structure has excellent damage resistance in splicing and using, and therefore has higher reliability.
The above-mentioned splicing structure or stress releasing structure in embodiments 1 to 5 may also be applied to the spliced screen body as shown in fig. 12, where the width of the non-light emitting region of the OLED screen body is less than or equal to 1 mm; the mounting area of the OLED screen body is located at the edge of the substrate. The stress relieving structure adopts at least one stress relieving structure.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. The spliced screen body is characterized by comprising a substrate and a plurality of OLED screen bodies spliced on the substrate; the OLED screen body is fixed on the substrate; the substrate is provided with a splicing structure and/or a stress release structure;
the splicing structure is used for preventing the screen body from being damaged due to the fact that the local curvature radius is too small when the screen body is spliced;
the stress release structure is used for releasing stress between the OLED screen body and the substrate when the screen body is bent.
2. The spliced screen body of claim 1, wherein the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the splicing structure is a slope bulge arranged at the splicing position of the substrates; the splicing side of the first screen body is adjacent to the thicker side of the slope protrusion; the splicing side of the second screen body is attached to the slope protrusion, and then the non-luminous area of the splicing side of the first screen body is covered.
3. The spliced screen body of claim 2, wherein the ramp protrusion is made of at least one material of PMMA, PET, PE, epoxy, polyolefin, PI.
4. The spliced screen body of claim 1, wherein the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the splicing structure is a triangular groove arranged at the splicing position of the substrates; the splicing side of the first screen body extends into the triangular groove; the spliced side of the second screen body covers the non-luminous area of the spliced side of the first screen body; and a filling material for filling the triangular groove is arranged above the splicing side of the first screen body.
5. The spliced screen body of claim 1, wherein the spliced OLED is formed by splicing a plurality of first screen bodies and a plurality of second screen bodies; the stress release structure is a splicing gap arranged on the substrate, and the splicing gap is arranged corresponding to a splicing position; and the splicing sides of the first screen body and the second screen body are inserted into the splicing gap.
6. Spliced screen body according to claim 2 or 4, characterized in that the slope of the ramp projection or the angle of the triangular groove with the horizontal direction of the substrate is more than 0 ° and less than 90 °, preferably 0 ° to 45 °.
7. The spliced screen body of any one of claims 1-5, wherein the substrate comprises, from top to bottom, an upper insulating layer, a conductive layer, and a lower insulating layer; the stress release structure is a slit formed in the upper insulating layer and/or the lower insulating layer; the slit is arranged along the length direction or the width direction of the substrate; the width scope of slit is 1um-50um, and the interval between the adjacent slit is 0.5mm-20 mm.
8. The spliced screen body of any one of claims 1-5, wherein the stress relief structure is a plurality of through holes formed in the substrate; the distance between the through holes is 0.5mm-20 mm; the area of the through hole is 0.01mm2To 100mm2。
9. The spliced screen body according to any one of claims 1 to 5, wherein an upper bending region is arranged at the head part of the OLED screen body, and a lower bending region is arranged on the substrate corresponding to the upper bending region; the upper routing area is provided with an FPC for electric connection, and the lower routing area is used for electric connection with the FPC; thickness H of the lower bonding regionLower partThe following formula is satisfied:
Hlower part＝HScreen (B)-HOn the upper part-Hfpc；
Wherein HLower partIs the thickness of the lower boarding region; hScreen (B)The thickness of the OLED screen body; hOn the upper partIs the thickness of the upper boarding region; hfpcIs the thickness of the lower FPC.
10. The spliced screen body according to any one of claims 1-5, wherein the OLED screen body is fixed to the substrate by glue; the viscose is at least one of epoxy resin, Polyurethane (PU), amino resin, phenolic resin, acrylic resin, polyacrylate and rubber.
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