CN111179760B - Display panel and bending method of display panel - Google Patents
Display panel and bending method of display panel Download PDFInfo
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- CN111179760B CN111179760B CN202010108847.7A CN202010108847A CN111179760B CN 111179760 B CN111179760 B CN 111179760B CN 202010108847 A CN202010108847 A CN 202010108847A CN 111179760 B CN111179760 B CN 111179760B
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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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- 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
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Abstract
The invention discloses a display panel and a bending method of the display panel, and relates to the technical field of display. The display panel includes display module assembly and sets up in the bearing structure that display module assembly deviates from display surface one side, and display module assembly includes the plane district, buckles the district and is located the transition district between district and the plane district of buckling, and bearing structure is including the fixed part that is used for fixed plane district and the extrusion portion that is used for extrudeing the transition district when buckling. According to the embodiment of the invention, the extrusion part is arranged in the transition area, and the extrusion part extrudes the transition area when the transition area is bent, so that the film layer of the OLED display module is prevented from being stripped, and the bending service life of the OLED display module is prolonged.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a method for bending the display panel.
Background
The OLED has the excellent characteristics of ultrathin, self-luminous, organic material, planar structure, low-temperature manufacturing process, compatibility with a plastic substrate and the like. Currently, flexible OLED screens are being developed in the direction of commercialization, and foldable screens are one of the development directions.
The curling radius of the OLED screen is gradually reduced, and the curling radius is increased from 30mm to 1 mm. In the related art, when the flexible OLED screen is folded along the central line, the inner film layer of the OLED display module is easily peeled off, which causes the failure of the OLED display module.
Disclosure of Invention
The embodiment of the invention provides a display panel, a bending method of the display panel and a display terminal, which are used for solving the problem of display failure caused by stripping of an OLED display module body.
In order to solve the above technical problem, an embodiment of the present invention provides a display panel, including a display module and a support structure disposed on a side of the display module away from a display surface, where the display module includes a planar area, a bending area, and a transition area located between the bending area and the planar area, and the support structure includes a fixing portion for fixing the planar area and an extrusion portion for extruding the transition area during bending.
Optionally, the supporting structure further includes a supporting portion disposed on the fixing portion and used for supporting the pressing portion.
Optionally, the pressing portion includes a roller and a motor for driving the roller to rotate, the supporting portion includes two supporting arms, the roller is disposed between the two supporting arms and connected to the supporting arms through a roller, and an extending direction of the roller is perpendicular to a plane where a bending direction of the bending region is located.
Optionally, the transition region includes a first transition region connected to one end of the bending region and a second transition region connected to the other end of the bending region, the first transition region is provided with a first row of roller sets, and the second transition region is provided with a second row of roller sets.
Optionally, the rollers of the first roller group and the second roller group have the same number.
Optionally, the distance between the first row of roller sets and the second row of roller sets gradually increases along the extension direction from the plane area to the transition area.
The embodiment of the invention also provides a bending method of the display panel, which comprises the following steps:
and bending the display module, and extruding the transition area through the extrusion part to ensure that the display module is bent into a water drop shape. .
Optionally, the extrusion part extrudes the transition zone, comprising: the transition position of transition district and bending zone is extruded to the extrusion portion, and the transition position is the position that is located transition district and is close to transition district and bending zone juncture.
Optionally, the transition district includes the first transition district of being connected with bending zone one end and the second transition district of being connected with the bending zone other end, and first transition district sets up first row of roller train, and the second transition district sets up second row of roller train, and extrusion portion extrudees the transition district, includes: and in the extending direction from the transition area to the plane area, the rollers of the first row of roller groups sequentially extrude the first transition area, and the rollers of the second row of roller groups sequentially extrude the second transition area.
Optionally, the roller of the first row of roller groups extrudes the first transition region in turn, and the roller of the second row of roller groups extrudes the second transition region in turn, including: the rollers of the first row of roller groups rotate clockwise in turn, and the rollers of the second row of roller groups rotate anticlockwise in turn.
According to the embodiment of the invention, the extrusion part is arranged in the transition area, and the extrusion part extrudes the transition area when being bent, so that the OLED display module body is prevented from being stripped, and the bending service life of the OLED display module is prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a diagram illustrating a structure of a display module according to the related art;
FIG. 2 is a schematic view of a drop bend of a display module according to the related art;
FIG. 3 is a top view of a display panel according to an embodiment of the present invention in a flattened state;
FIG. 4 is a bottom side view of a display panel in a flattened state according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the operation of a display panel according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating a bending process of a display panel according to an embodiment of the invention.
Description of the reference numerals
10-a display panel; 100-a display module; 101-display layer
102-a first optically clear adhesive layer; 104-a cover sheet layer; 105-a metal support layer;
103-a second optically clear adhesive layer; 110-planar area; 111-a first planar zone;
112-a second planar zone; 120-transition zone; 121-a first transition zone;
122-a second transition zone; 130-a bending zone; 200-a support structure;
210-a fixed part; 220-an extrusion part; 221-roller.
222-a roller; 223-a motor; 230-a support portion;
231-a first support arm; 232-second support arm.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In the related art, when the flexible OLED screen is folded along the central line, the film layer in the OLED display module is easily peeled off, which causes the OLED display module to fail. Fig. 1 is a diagram illustrating a structure of a display module in the related art. As shown in fig. 1, the display module 100 includes a display layer 101, a first optical Clear Adhesive layer 102 disposed on a display side of the display layer 101, a second optical Clear Adhesive layer 103 disposed on a side of the display layer 101 away from the display side, a cover plate layer 104 disposed on a side of the first optical Clear Adhesive layer 102 away from the display layer, and a metal support layer 105 disposed on a side of the second optical Clear Adhesive layer 103 away from the display layer, where the first optical Clear Adhesive layer 102 and the second optical Clear Adhesive layer 103 are collectively referred to as an Optical Clear Adhesive (OCA) layer. Fig. 2 is a schematic diagram of a drop-shaped display module in the related art, and as shown in fig. 2, when the display module 100 is folded in a drop shape along a central line, a portion on the left side of an imaginary line a is a planar area 110, a portion between the imaginary lines a and B is a transition area 120, a portion on the right side of the imaginary line B is a bending area 130, the transition area 120 is an outward bending area when the display module is bent in a drop shape, and the bending area 130 is an inward bending area when the display module is bent in a drop shape. The pulling force that the outer surface of transition zone 120 bore bending zone 130 outer surface to the right, and the inner surface of transition zone 120 bore bending zone 130 inner surface thrust left, and the effect of both forces is opposite, and then makes the OCA layer in the display module assembly 100 bear very big shearing force, when OCA body cohesion is not enough to resist the shearing force, just takes place OCA rete and peels off. Moreover, the display surface of the transition area 120 is outwardly curved, and the outer surface of the transition area 120 is squeezed again, so that the local thickness of the second optical transparent adhesive layer is increased, and the local thickness is reduced.
In order to solve the problem of display failure caused by peeling of an OLED display module body in the OLED bending process, the embodiment of the invention provides a display panel, which comprises a display module and a supporting structure arranged on one side, away from a display surface, of the display module, wherein the display module comprises a plane area, a bending area and a transition area located between the bending area and the plane area, and the supporting structure comprises a fixing part used for fixing the plane area and an extrusion part used for extruding the transition area during bending.
The technical solution of the embodiment of the present invention is specifically described below with reference to the accompanying drawings.
FIG. 3 is a top view of a display panel according to an embodiment of the present invention in a flattened state, and FIG. 4 is a bottom view of the display panel according to an embodiment of the present invention in a flattened state. As shown in fig. 3-4, the display panel 10 includes a display module 100 and a supporting structure 200 disposed on a side of the display module 100 facing away from the display surface.
As shown in fig. 4, the display module 100 includes a planar area 110, a bending area 130, and a transition area 120 disposed between the planar area 110 and the bending area 130, the planar area 110 is a portion other than a portion between the dotted line a and the dotted line a', wherein, the left side area of the dotted line a in fig. 4 is the first planar area 111, the right side area of the dotted line a 'is the second planar area 112, the transition area 120 is the portion between the dotted line a and the dotted line B and between the dotted line a' and the dotted line B ', the bending area 130 is the portion between the dotted lines B and B', in fig. 4, a first transition area 121 is located between the dotted line a and the dotted line B, the first transition area 121 connects one end of the bending area 130 and the first planar area 111, in fig. 4, a second transition area 122 is located between the dashed line a 'and the dashed line B', and the second transition area 122 connects the other end of the bending area 130 and the second planar area 112, that is, the transition area 120 includes a first transition area 121 and a second transition area 122. Bending region 130 is a deformable region, and is a stress concentration region when display panel bends, and when display panel 10 is unfolded, the display surface of bending region 130 can be in a flat state when display panel is in use, and after display panel 10 bends, the display surface of bending region 130 can be in a curved state. The flat area 110 may be in a fixed state, that is, the shape of the display surface of the flat area 110 remains unchanged during the use of the display panel. The transition area 120 is a transition area from the bending area to the flat area when the display module is bent in a drop shape, and the transition area may be bent outward.
As shown in fig. 4, the two support structures 200 are spaced apart from each other, and a bending space for bending the bending region 130 is formed between the two support structures 200.
FIG. 5 is a cross-sectional view of a display panel according to an embodiment of the invention. As shown in fig. 5, the supporting structure 200 includes a fixing portion 210 for fixing the planar area 110 and a pressing portion 220 for pressing the transition area 120 when bent. Optionally, the pressing portion may be disposed at a transition position between the transition region and the bending region, where the transition position is a position located in the transition region and close to a junction of the transition region and the bending region.
According to the embodiment of the invention, the extrusion part is arranged in the transition region, the extrusion part can extrude the transition region when the display module is bent, and when the transition region is extruded, an acting force which is opposite to the acting force of the bending region borne by the extruded surface of the transition region and is the same as the acting force of the bending region borne by the display surface is generated on the extruded surface of the transition region, so that the resultant force of the shearing forces of the inner surface and the outer surface borne by the OCA in the transition region is reduced, the stretching of the optical transparent adhesive is reduced, the stripping of the OLED display module body is prevented, and the bending life of the OLED display module is prolonged.
The pressing part comprises a roller for pressing the transition area and a motor for driving the roller.
Fig. 6 is a schematic diagram illustrating an operation principle of a display panel according to an embodiment of the present invention. As shown in fig. 5 and 6, the pressing portion 220 may include a roller 221 and a motor 223, the motor 223 drives the roller 221 to rotate, and an extending direction of a roller 222 of the roller 221 is perpendicular to a bending direction of the bending region 130, that is, the extending direction of the roller is perpendicular to a plane in which the bending direction of the bending region is located, that is, perpendicular to a paper surface shown in fig. 6. The supporting structure further includes a supporting portion 230 disposed on the fixing portion 210 and configured to support the pressing portion 220, the supporting portion 230 may include two supporting arms, that is, a first supporting arm 231 and a second supporting arm 232, the first supporting arm 231 and the second supporting arm 232 are disposed in parallel, one end of the fixing portion 210 where the supporting portion is disposed is located at a junction of the plane area 110 and the transition area 120, and the roller 221 is disposed between the two supporting arms, that is, between the first supporting arm 231 and the second supporting arm 232, and is connected to the first supporting arm 231 and the second supporting arm 232 through the roller 222. The motor 223 may be disposed on the support arm. Under the state that bending area 130 is buckled, motor 223 drive gyro wheel 221 is rotatory, and gyro wheel 221 extrudees transition zone 120, prevents that the OCA rete from peeling off.
In this embodiment, as shown in fig. 6, the pressing portion includes a plurality of rollers 221, wherein a first row of roller sets, i.e., the upper row of roller sets shown in fig. 6, is disposed in the first transition region 121, a second row of roller sets, i.e., the lower row of roller sets shown in fig. 6, is disposed at the second transition region 122, the first row of roller sets and the second row of roller sets both include a plurality of rollers 221, the display module is in the bent state, and the rollers 221 of the first transition region 121 and the second transition region 122 are disposed opposite to each other and press the transition region. Along the extension direction of the planar area 110 to the transition area 120, i.e. the direction indicated by Y in fig. 6, the distance between the first row of rollers and the second row of rollers gradually increases to form a trumpet shape. The number of the rollers in the first row of roller groups and the number of the rollers in the second row of roller groups may be the same or different, in this embodiment, the number of the rollers in the first row and the number of the rollers in the second row may be four, and certainly, the number of the rollers in each row is arranged according to the size of the bending area, and may be two or five, which is not limited herein.
The technical solution of the embodiment of the present invention is further described by the bending process of the display panel.
FIG. 7 is a diagram illustrating a bending process of a display panel according to an embodiment of the invention. The roller does not rotate when the display panel is in a flat state. As shown in fig. 6 and 7, the display module is in the bending process, the shapes of the transition region and the bending region gradually transition from the U-shape to the fish mouth shape, the display surface of the bending region 130 is inward bent, wherein the U-shape is the shape of a shown in fig. 7, the fish mouth shape is the shape of b shown in fig. 7, in the bending process, the OCA in the display module deforms from the bending region 130 to the transition region 120, after the fish mouth shape is formed, the plurality of rollers 221 push the transition region 120, so that the shapes of the transition region 120 and the bending region 130 are changed to the water drop shape, the water drop shape is the shape of c shown in fig. 7, and the plurality of rollers 221 in the same row sequentially rotate from right to left, that is, the rollers in the first row of roller groups sequentially rotate from the bending region 130 to the plane region 110, wherein the rollers in the first row of roller groups rotate clockwise, and the rollers in the second row of roller groups rotate counterclockwise. The roller rotates to press the transition area and generate a force on the transition area, which is tangential to the pressed surface and directed to the plane area, and the direction of the force is the Z direction shown in figure 6. The force is just opposite to the direction of the action force of the bending area of the extruded surface, so that the shearing force of the outer surface and the inner surface borne by the OCA in the area is reduced, the stretching of the OCA at the position is reduced, the OCA film layer is prevented from being stripped, and the rotation can be stopped after the roller rotates for a certain time. It should be noted that the display module may not be bent in the fish-mouth shape during the bending process, and the bending process of this embodiment is only an exemplary description.
In this embodiment, when the whole incurve of display module assembly, first transition district and second transition district can form the outer bending under the gyro wheel extrusion, transition district and bending region constitute water droplet type shape jointly, when the water droplet type is buckled at display module assembly promptly, the transition district is outer crooked position, the bending region is interior crooked position, in the rotatory in-process of gyro wheel like this, in first transition district and second transition district position, local accumulational OCA can be flat and smooth under the extrusion of gyro wheel, alleviate local piling up of this regional OCA, make this regional OCA keep the ability of resisting the strain, prevent that the OCA rete from peeling off, extension display module assembly life of buckling. And, the display module assembly water droplet type is buckled, and the interval between the plane district is less, and display panel is more pleasing to the eye after buckling. Because the stress born by the OCA at the transition position of the outer bending and the inner bending is larger, optionally, the extrusion part extrudes the transition position of the transition region and the bending region, and the transition position is a position which is positioned in the transition region and is close to the junction of the transition region and the bending region.
In this embodiment, the display panel may be used in a mobile phone or a tablet computer, and other foldable display terminal products. According to the embodiment of the invention, the extrusion part is arranged in the transition region of the display module, so that after bending, the shearing force of the inner layer surface and the outer layer surface of the transition region to the OCA can be reduced, the stretching of the OCA is reduced, the OCA film layer is prevented from being peeled, and the service life of the display panel is further prolonged.
It should be noted that the embodiment of the present invention can also be used for display panels that are bent outward, the so-called inward bending is as described in the above embodiments, that is, the display panel is bent inward, the so-called outward bending is opposite to the inward bending, and the display panel that is bent outward. When the display module bends outwards, the supporting structure is arranged on the inner side of the bent display module. The pressing portion may adopt other technical means in the art, and the technical idea of the invention is not deviated from the protection scope of the invention.
In an exemplary embodiment, an embodiment of the present invention further provides a method for bending a display panel, including: and bending the display module, and extruding the transition area through the extrusion part to ensure that the display module is bent into a water drop shape.
Specifically, the extrusion portion extrudes the transition zone, includes: the transition position of transition district and bending zone is extruded to the extrusion portion, and the transition position is the position that is located transition district and is close to transition district and bending zone juncture.
The transition district includes the first transition district of being connected with bending zone one end and the second transition district of being connected with the bending zone other end, and first transition district sets up first row of roller train, and the second transition district sets up second row of roller train, and extrusion portion extrudees the transition district, includes: and in the extending direction from the transition area to the plane area, the rollers of the first row of roller groups sequentially extrude the first transition area, and the rollers of the second row of roller groups sequentially extrude the second transition area.
Wherein, the gyro wheel of the roller train of first row extrudees first transition zone in proper order, and the gyro wheel of the roller train of second row extrudees the second transition zone in proper order, specifically includes: the rollers of the first row of roller groups rotate clockwise in turn, and the rollers of the second row of roller groups rotate anticlockwise in turn.
Before the display module is bent into the fish mouth shape, the bending method of the display panel comprises the following steps:
bending the display module from the U shape to the fish mouth shape.
The embodiment of the invention provides a bending method of a display panel, which is characterized in that a display module is bent, and a transition area is extruded by an extrusion part, so that the display module is bent into a water drop shape, the stretching of optical transparent adhesive is reduced, the peeling of an OLED display module body is prevented, and the bending life of the OLED display module is prolonged.
In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A display panel is characterized by comprising a display module and a support structure arranged on one side of the display module, which is far away from a display surface, wherein the display module comprises a plane area, a bending area and a transition area positioned between the bending area and the plane area, and the support structure comprises a fixing part for fixing the plane area and an extrusion part for extruding the transition area during bending;
the display module comprises an optical transparent adhesive film layer, the extrusion part comprises a roller, and the roller extrudes the transition area to prevent the optical transparent adhesive film layer from being stripped under the bending state of the bending area.
2. The display panel according to claim 1, characterized in that: the supporting structure further comprises a supporting part which is arranged on the fixing part and used for supporting the pressing part.
3. The display panel according to claim 2, characterized in that: the extrusion portion still includes the drive the rotatory motor of gyro wheel, the supporting part includes two support arms, the gyro wheel sets up in two between the support arm and through roller bearing and support arm connection, the extending direction of roller bearing with the plane at the direction place of buckling of bending zone is perpendicular.
4. The display panel according to claim 3, wherein: the transition region comprises a first transition region and a second transition region, the first transition region is connected with one end of the bending region, the second transition region is connected with the other end of the bending region, the first transition region is provided with a first row of roller groups, and the second transition region is provided with a second row of roller groups.
5. The display panel according to claim 4, wherein: the rollers of the first row of roller groups and the second row of roller groups are the same in number.
6. The display panel of claim 5, wherein the first row of rollers and the second row of rollers are gradually increased in pitch along the extension direction of the planar area to the transition area.
7. A method for bending the display panel according to any one of claims 1 to 6, comprising: bending the display module, and extruding the transition area through the extrusion part to bend the display module into a water drop shape;
the display module assembly comprises an optical transparent adhesive film layer, the extrusion part comprises a roller, and the roller extrudes the transition area to prevent the optical transparent adhesive film layer from being stripped when the display module assembly is in a bent state.
8. The bending method according to claim 7, wherein: the extrusion portion extrudes the transition zone, including: the extrusion part extrudes the transition position of the transition area and the bending area, and the transition position is a position which is positioned in the transition area and is close to the junction of the transition area and the bending area.
9. The bending method according to claim 7 or 8, wherein: the transition district includes the first transition district of being connected with bending zone one end and the second transition district of being connected with the bending zone other end, first transition district sets up first row of roller train, the second transition district sets up second row of roller train, the extrusion portion extrudees the transition district, includes: and in the extending direction from the transition region to the plane region, the rollers of the first row of roller groups sequentially extrude the first transition region, and the rollers of the second row of roller groups sequentially extrude the second transition region.
10. The bending method according to claim 9, wherein: the gyro wheel of the first row of roller train extrudees first transition zone in proper order, the gyro wheel of the second row of roller train extrudees second transition zone in proper order, include: the rollers of the first row of roller groups rotate clockwise in sequence, and the rollers of the second row of roller groups rotate anticlockwise in sequence.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111489653B (en) * | 2020-05-28 | 2022-04-08 | 武汉天马微电子有限公司 | Foldable display device and driving method thereof |
| CN113936550B (en) * | 2020-06-29 | 2023-02-14 | 华为技术有限公司 | Inward folding screen electronic equipment |
| CN112562514B (en) * | 2020-12-15 | 2023-03-17 | 合肥维信诺科技有限公司 | Bending structure, display device and bending jig |
| CN112863363B (en) * | 2021-03-04 | 2022-08-05 | 武汉华星光电半导体显示技术有限公司 | Curling display device |
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