CN113470518A - Flexible support piece, flexible display panel and display device - Google Patents
Flexible support piece, flexible display panel and display device Download PDFInfo
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- CN113470518A CN113470518A CN202110614910.9A CN202110614910A CN113470518A CN 113470518 A CN113470518 A CN 113470518A CN 202110614910 A CN202110614910 A CN 202110614910A CN 113470518 A CN113470518 A CN 113470518A
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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 provides a flexible support, a flexible display panel and a display device, wherein the flexible support comprises: the first support layer comprises a first bendable support area, and a plurality of first convex blocks are arranged in the first bendable support area; the second supporting layer comprises a second bendable supporting area opposite to the first bendable supporting area, a plurality of second convex blocks are arranged in the second bendable supporting area, and the projection of each first convex block and the projection of each second convex block do not coincide in the thickness direction of the flexible supporting element; the first bumps and the second bumps form a plurality of supporting units, the supporting units are arranged along a first direction, and a stress release area is arranged between every two adjacent supporting units.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible supporting piece, a flexible display panel and a display device.
Background
The OLED display panel is a display panel made of Organic Light-Emitting diodes (OLEDs). The OLED display panel is getting more and more attention and recognition due to its features of being light and thin (without backlight), high brightness of image display, high definition, deformability, flexibility (i.e. flexibility), energy saving, and the like, especially the outstanding feature of flexibility. More and more electronic devices currently employ OLED flexible display panels. The flexible display panel is a deformable, bendable display panel made of a flexible material.
The bending resistance and impact resistance of the flexible display panel in the prior art need to be improved.
Disclosure of Invention
The invention provides a flexible supporting piece, a flexible display panel and a display device, which are used for enhancing the shock resistance and bending resistance of the flexible display panel.
In order to solve the above problems, the present invention provides a flexible supporting member, including: the first support layer comprises a first bendable support area, and a plurality of first convex blocks are arranged in the first bendable support area; the second supporting layer comprises a second bendable supporting area opposite to the first bendable supporting area, a plurality of second convex blocks are arranged in the second bendable supporting area, and the projection of each first convex block and the projection of each second convex block do not coincide in the thickness direction of the flexible supporting element; the first bumps and the second bumps form a plurality of supporting units, the supporting units are arranged along a first direction, and a stress release area is arranged between every two adjacent supporting units. The bendable supporting area adopts a double-layer supporting layer design, and each supporting layer can be thinner in thickness and is easy to bend; meanwhile, the first lug and the second lug which are not overlapped with each other can form a stress release area, and the stress release area absorbs the stress generated by bending of the flexible supporting piece.
As an optional technical solution, the first bendable supporting region further includes a plurality of first grooves, and the plurality of first grooves are opposite to the plurality of second bumps; the second bendable supporting area further comprises a plurality of second grooves, and the second grooves are opposite to the first bumps; the first bumps are respectively arranged in the second grooves, and the second bumps are respectively arranged in the first grooves. A plurality of supporting units are formed through the first bumps and the second bumps, and stress release areas are formed between the adjacent supporting units to disperse bending stress of the flexible supporting piece.
As an optional technical solution, the stress release region includes a groove structure between the first bendable support region and the second bendable support region. Embodiments of a stress relief region are provided.
As an alternative solution, the groove structure is a through groove or a non-through groove extending from one side edge of the flexible support member to the opposite other side edge. Embodiments of a stress relief region are provided.
As an optional technical solution, the through groove includes a strip-shaped groove or a zigzag-shaped groove. Embodiments of a stress relief region are provided.
As an optional technical solution, in each of the supporting units, each of the first bumps and each of the second bumps are alternately disposed. The arrangement mode of the lugs is utilized to provide a stress release area, and meanwhile, the strength of the bendable support area of the flexible support piece is ensured, and the impact resistance is improved.
As an optional technical solution, each of the first bumps and each of the second bumps are aligned, or each of the first bumps and each of the second bumps are disposed in a staggered manner. The arrangement mode of the lugs is utilized to provide a stress release area, and meanwhile, the strength of the bendable support area of the flexible support piece is ensured, and the impact resistance is improved.
As an optional technical solution, each of the first bumps and each of the second bumps are elongated bumps extending from one side of the flexible supporting member toward the other opposite side. The whole structure of the strip-shaped convex block can support the bendable supporting area with better strength, and the impact resistance is improved.
The invention also provides a flexible display panel, which comprises a display unit, wherein the display unit comprises a bendable display area and plane display areas positioned at two sides of the bendable display area, and the back side of the bendable display area is provided with the flexible supporting piece.
The invention also provides a display device comprising the flexible display panel.
The invention provides a flexible supporting piece, a flexible display panel and a display device, wherein a bendable supporting area of the flexible supporting piece adopts a double-layer supporting layer structure, the double-layer supporting structure comprises a plurality of first lugs, a plurality of second lugs and a stress release area which are not overlapped, when the flexible supporting piece is bent, the first lugs and the second lugs move in a dislocation way to release stress generated by bending, and the stress release area is utilized to absorb the stress, so that the stress is prevented from being transmitted to a film layer of a display unit to damage the film layer of the bendable display area of the display unit, the service life of the flexible display panel is prolonged, and the phenomena of crease, white line and the like are reduced.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a cross-sectional view of a conventional flexible display panel in a bent state.
Fig. 2 is a plan view of a conventional flexible support in an unfolded state.
FIG. 3 is a schematic top view of a first support layer of a flexible support in an expanded state according to an embodiment of the invention.
Fig. 4 is a schematic top view of a second support layer of a flexible support in an unfolded state according to an embodiment of the invention.
Fig. 5 is a schematic top view illustrating the second bendable supporting region of the second supporting layer in fig. 4 superimposed on the first bendable supporting region of the first supporting layer in fig. 3.
FIG. 6 is a schematic top view of a flexible support according to another embodiment of the present invention in an expanded state.
Fig. 7 is a schematic top view of a second support layer of a flexible support in an unfolded state according to another embodiment of the invention.
Fig. 8 is a schematic top view illustrating the second bendable supporting region of the second supporting layer in fig. 7 superimposed on the first bendable supporting region of the first supporting layer in fig. 6.
Fig. 9 is a schematic top view of a flexible supporting member with the area of the second supporting layer removed except for the second bumps according to another embodiment of the present invention.
FIG. 10 is a schematic top view of a flexible support according to yet another embodiment of the invention with the first support layer in an expanded state.
Fig. 11 is a schematic top view of a flexible support member with a second support layer deployed according to yet another embodiment of the present invention.
Fig. 12 is a top view of the second bendable support region of the second support layer of fig. 11 superimposed on the first bendable support region of the first support layer of fig. 10.
Fig. 13 is a schematic cross-sectional view of the first support layer and the second support layer of fig. 10 and 11 after they are stacked.
Fig. 14 is a cross-sectional view of a folded state of a flexible display panel provided in an embodiment of the present invention.
Fig. 15 is a schematic cross-sectional view of the flexible display panel in fig. 14 in an unfolded state.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Compared with the traditional rigid display panel, the flexible display panel has the most outstanding advantages that the original inherent concept of two-dimensional display is broken through, and the application field of the display is expanded to electronic equipment with more dimensions and more portability. Foldable displays have received a great deal of attention in the industry as one of the development directions of the new generation of flexible display technologies. However, flexible display panels also have their own drawbacks and deficiencies. The inventor finds that the flexible display panel is relatively light and thin, so that the flexible display panel is poor in bending resistance and impact resistance; the local large deformation caused by frequent bending may cause the denaturation of the polymer material in the flexible display panel, and even the phenomena of 'crease', 'white line' and the like appear in the bending area, which causes the failure of the flexible display panel. Therefore, it is necessary to improve the bending resistance and impact resistance of the flexible display panel.
As shown in fig. 1 and fig. 2, the conventional flexible display panel 10 generally includes a display unit 11 and a flexible supporting member 12 disposed at a back side of the display unit 11, wherein the flexible supporting member 12 includes a planar supporting region 12b and a bendable supporting region 12a, and the planar supporting region 12b is disposed at two sides of the bendable supporting region 12 a.
The plane supporting region 12b corresponds to the plane display region of the display unit 11, the bendable supporting region 12a corresponds to the bendable display region of the display unit 11, the bendable display region of the display unit 11 and the film layer of the bendable supporting region 12a cause the high polymer material in the bendable display region of the display unit 11 to be denatured due to the stress generated by bending, and even the bendable display region has the phenomena of 'crease', 'white line', etc., which causes the display unit to fail. In view of this, the present embodiment provides a flexible supporting member, which is applied to a flexible display panel, and a supporting unit and a stress releasing region are disposed in a bendable supporting region of the flexible supporting member, so that when the flexible display panel is bent, stress is dispersed, a problem that a large local deformation amount caused by long-time bending due to stress concentration may cause denaturation of a polymer material in the flexible display panel is avoided, and phenomena such as "crease" and "white line" in the bendable supporting region are avoided.
As shown in fig. 3 to 5, an embodiment of the invention provides a flexible supporting element 100, which includes a first supporting layer 110 and a second supporting layer 120, wherein the first supporting layer 110 includes a first bendable supporting region 111, and a plurality of first bumps 113 are disposed in the first bendable supporting region 111; the second supporting layer 120 is stacked on one side of the first supporting layer 110, the second supporting layer 120 includes a second bendable supporting region 121 opposite to the first bendable supporting region 111, a plurality of second bumps 123 are disposed in the second bendable supporting region 121, and a projection of each first bump 113 and a projection of each second bump 123 do not coincide in a thickness direction of the flexible supporting member 100; the plurality of first bumps 113 and the plurality of second bumps 123 form a plurality of supporting units 130, the plurality of supporting units 130 are arranged along a first direction, and a stress relief region 140 is formed between adjacent supporting units 130.
In the present embodiment, the first direction is, for example, a long side direction of the flexible support 100. Of course, in other embodiments of the present invention, the first direction may be along the short side direction, the diagonal direction, or other directions of the flexible supporting member 100 according to the arrangement of the first bumps 113 and the second bumps 123.
The thickness direction of the flexible support 100 refers to a direction perpendicular to the paper plane as the thickness direction of the flexible support 100 with reference to the flexible support 100 illustrated in fig. 5.
Fig. 3 to 5 illustrate the first support layer 110, the second support layer 120 and the flexible support 100 in an unfolded state, which is a flat unfolded state.
The flexible support 100 has the following beneficial effects: the bendable support area of the flexible support member 100 adopts a double-layer support layer design, and compared with a single-layer flexible support member, each layer of the double-layer support layer can be thinner in thickness, and the thinned support layer has smaller bending stress and is easier to bend; simultaneously, first support area and the second support area of can buckling set up the first lug and the second lug that do not overlap each other, make and form the stress release district between first support area and the second support area of can buckling, the stress that flexible support piece buckled the production is absorbed in the stress release district, avoid this stress conduction to the rete damage of the flexible display panel's that leads to on the rete of flexible display panel, improve flexible display panel's the display area life of can buckling, and, reduce the emergence of phenomenons such as "crease", "white line" appear.
Specifically, the stress relief region 140 includes a groove structure between the first bendable supporting region 111 and the second bendable supporting region 121.
As shown in fig. 3, the first bendable supporting region 111 further includes a plurality of first grooves 114, the plurality of first grooves 114 are located between the plurality of first bumps 113, specifically, the first bumps 113 and the first grooves 114 are sequentially and alternately disposed, wherein the first grooves 114 are formed by, for example, being recessed from one side surface of the first supporting layer 110 toward the other side surface.
As shown in fig. 4, the second bendable supporting region 121 further includes a plurality of second grooves 124, the plurality of second grooves 124 are located between the plurality of second bumps 123, specifically, the second bumps 123 and the second grooves 124 are alternately arranged in sequence, wherein the second grooves 124 are formed by, for example, being recessed from one side surface of the second supporting layer 120 toward the other side surface.
For clearly illustrating the stacking relationship between the first bendable support region 111 and the second bendable support region 121, other regions of the second support layer 120 except for the plurality of second bumps 123 are omitted in fig. 5.
As shown in fig. 3 to 5, the plurality of first grooves 114 are opposite to the plurality of second protrusions 123, the plurality of second grooves 124 are opposite to the plurality of first protrusions 113, the plurality of first protrusions 113 are respectively embedded or disposed in the plurality of corresponding second grooves 124, and the plurality of second protrusions 123 are respectively embedded or disposed in the plurality of corresponding first grooves 114. The plurality of first bumps 113 and the plurality of second bumps 123 form a plurality of supporting units 130, the plurality of supporting units 130 are arranged along a first direction, a stress relief area 140 is formed between adjacent supporting units, and the stress relief area 140 is used for dispersing bending stress of the flexible supporting member 100.
In this embodiment, the plurality of supporting units 130 are, for example, arranged along the long side direction (or the first direction) of the flexible supporting member 100, the first bumps 113 and the second bumps 123 in each supporting unit 130 are alternately arranged along the short side direction of the flexible supporting member 100, and the first bumps 113 and the second bumps 123 are aligned with each other. The sidewalls of the first bump 113 and the second bump 123 are in contact with each other, and the first bump 113 and the second bump 123 in contact with each other can provide mutual reinforcement, thereby improving the strength of the bendable supporting region of the flexible supporting member 100. That is, while the bending stress of the flexible supporting member 100 is reduced, the strength of the bendable supporting region of the flexible supporting member 100 is ensured to support the display unit, and the impact resistance of the display unit is improved.
As shown in fig. 5, the stress relief region 140 may be, for example, a groove structure, which is a through groove extending from one side edge of the flexible support 100 toward the other opposite side edge, and the through groove is, for example, a strip-shaped groove.
In this embodiment, the extending direction of the strip-shaped groove is parallel to the short side direction of the flexible supporting member 100, but not limited thereto. In other embodiments of the present invention, when the stress releasing region 140 is a strip-shaped groove, the extending direction of the strip-shaped groove may also be parallel to the long side direction, the diagonal direction, etc. of the flexible supporting member.
In addition, the extending direction of the bar-shaped grooves is parallel to the short side direction, the arrangement direction of the support units 130 is parallel to the long side direction of the flexible support 100, and the long side direction of the flexible support 100 corresponds to the first direction, i.e., the extending direction of the bar-shaped grooves is perpendicular to the arrangement direction of the support units 130. In other words, the extending direction of the stress relieving regions 140 is perpendicular to the first direction of the arrangement of the supporting units 130.
As shown in fig. 3, the first supporting layer 110 further includes a first planar supporting region 112, and the first planar supporting region 112 is disposed on two opposite sides of the first bendable supporting region 111. As shown in fig. 4, the second support layer 120 further includes a second planar support region 122, and the second planar support region 122 is disposed on two opposite sides of the second bendable support region 121. The first plane supporting area 112 and the second plane supporting area 122 are arranged to enhance the impact resistance of the plane display area of the display unit, and the sizes of the first plane supporting area 112 and the second plane supporting area 122 can be adjusted according to actual requirements, so that the first plane supporting area and the second plane supporting area partially cover or completely cover the plane display area.
In a preferred embodiment, the first planar supporting region 112 and the second planar supporting region 122 are combined to form an integrated structure by means of attaching or welding, wherein the first bendable supporting region 111 and the second bendable supporting region 121 maintain a double-layer structure after being combined. When the first bendable supporting region 111 and the second bendable supporting region 121 of the double-layer structure are bent, the plurality of first bumps 113 and the plurality of second bumps 123 are displaced from each other, so that the release of bending stress is realized. In addition, the released bending stress is absorbed by the stress release region 140.
In addition, the top of each first bump 113 protrudes from the surface of the first planar supporting region 112 of the first supporting layer 110; the top of each second bump 123 protrudes out of the surface of the second planar support region 122 of the second support layer 120; so as to ensure that the first protrusion 113 can be embedded or inserted into the corresponding second groove 124, and the second protrusion 123 can be embedded or inserted into the corresponding first groove 114, and the sidewall of the first protrusion 113 and the sidewall of the second protrusion 123 can be contacted, thereby enhancing the strength of the bendable supporting region. Wherein a surface of the first planar support region 112 and a surface of the second planar support region 122 are opposed.
In a preferred embodiment, the material of the first support layer 110 and the second support layer 120 is selected from plastic, stainless steel, etc., and when selected from plastic, polymethyl methacrylate (acrylic) resin is preferred.
As shown in fig. 6 to 8, the present invention further provides a flexible supporting member 200, and the flexible supporting member 200 is different from the flexible supporting member 100 in that the arrangement of the first protrusions 213 and the second protrusions 223 in the flexible supporting member 200 is different.
Specifically, the flexible support 200 includes a first support layer 210 and a second support layer 220, the first support layer 210 including a first bendable support region 211, the first support region 211 having a plurality of first protrusions 213 disposed therein; the second supporting layer 220 is stacked on one side of the first supporting layer 210, the second supporting layer 220 includes a second bendable supporting region 221 opposite to the first bendable supporting region 211, a plurality of second bumps 223 are disposed in the second bendable supporting region 221, and a projection of each first bump 213 and a projection of each second bump 223 do not overlap in a thickness direction of the flexible supporting member 200; the plurality of first bumps 213 and the plurality of second bumps 223 form a plurality of support units 230, the plurality of support units 230 are arranged along a first direction, and a stress relief area 240 is formed between adjacent support units 230.
As shown in fig. 6, the first bendable supporting region 211 further includes a plurality of first grooves 214, the plurality of first grooves 214 are located between the plurality of first bumps 213, and specifically, the first grooves 214 and the first bumps 213 are alternately disposed in sequence, wherein the first grooves 214 are formed by, for example, being recessed from one side surface of the first supporting layer 110 toward the other side surface.
As shown in fig. 7, the second bendable supporting region 221 further includes a plurality of second grooves 224, the plurality of second grooves 224 are located between the plurality of second protrusions 223, specifically, the second grooves 224 and the second protrusions 223 are alternately arranged in sequence, wherein the second grooves 224 are, for example, formed by being recessed from one side surface of the second supporting layer 220 toward the other side surface.
For clearly illustrating the stacking relationship between the first bendable support region 211 and the second bendable support region 221, other regions of the second support layer 220 except for the plurality of second bumps 223 are omitted in fig. 8.
As shown in fig. 6 to 8, the first bumps 213 are respectively embedded in the corresponding second grooves 224, and the second bumps 223 are respectively embedded in the corresponding first grooves 214. The plurality of first bumps 213 and the plurality of second bumps 223 form a plurality of support units 230, the plurality of support units 230 are arranged along a long side direction (or a first direction) of the flexible support 200, a stress relief area 240 is formed between adjacent support units 230, and the stress relief area 240 is used for dispersing bending stress of the flexible support 200.
In this embodiment, the first bumps 213 and the second bumps 223 of each supporting unit 230 are alternately arranged along the short side direction of the flexible supporting member 200, and the first bumps 113 and the second bumps 123 are staggered from each other. Wherein, the sidewall of the first bump 213 contacts the sidewall of the second bump 214, and the first bump 213 and the second bump 214 with partial sidewalls contacting each other can provide mutual reinforcement to improve the strength of the bendable supporting region of the flexible supporting member 200. That is, while the bending stress of the flexible supporting member 200 is reduced, the strength of the bendable supporting region of the flexible supporting member 200 is ensured to support the display unit, and the impact resistance of the display unit is improved.
As shown in fig. 8, the stress relief area 240 is, for example, a through slot extending from one side edge of the flexible support 100 toward the opposite side edge, and the through slot is, for example, a zigzag groove.
In this embodiment, the extending direction of the zigzag groove is parallel to the short side direction of the flexible supporting member 200, but not limited thereto. In other embodiments of the present invention, when the stress releasing region 240 is a zigzag groove, the extending direction of the zigzag groove may also be parallel to the long side direction, the diagonal direction, and the like of the flexible supporting member.
In addition, the extending direction of the zigzag groove is parallel to the short side direction, the arrangement direction of the supporting units 230 is parallel to the long side direction of the flexible supporting member 200, and the long side direction of the flexible supporting member 200 corresponds to the first direction, that is, the extending direction of the zigzag groove is perpendicular to the arrangement direction of the supporting units 230. In other words, the extending direction of the stress relief regions 240 is perpendicular to the first direction in which the support units 230 are arranged.
As shown in fig. 6 and 7, the first supporting layer 210 further includes a first planar supporting region 212, the first planar supporting region 212 is disposed on two opposite sides of the first bendable supporting region 211; the second support layer 220 further includes a second planar support region 222, and the second planar support region 222 is disposed on two opposite sides of the second bendable support region 221. The first planar supporting area 212 and the second planar supporting area 222 are respectively used for enhancing the impact resistance of the planar display area of the display unit, and the size of the planar display area can be adjusted according to actual requirements, so that the planar display area can be partially covered or completely covered by the planar supporting area.
In a preferred embodiment, the first planar supporting region 212 and the second planar supporting region 222 are combined to form an integrated structure by means of attaching or welding, wherein the first bendable supporting region 211 and the second bendable supporting region 221 maintain a double-layer structure after being combined. When the first bendable supporting region 211 and the second bendable supporting region 221 of the dual-layer structure are bent, the plurality of first bumps 213 and the plurality of second bumps 223 are displaced from each other, so that the release of the bending stress is realized. In addition, the released bending stress is absorbed by the stress releasing region 240.
In addition, the top of each first bump 213 protrudes from the surface of the first planar supporting region 212 of the first supporting layer 210; the top of each second bump 223 protrudes out of the surface of the second planar support region 222 of the second support layer 220; so as to ensure that the sidewall of the first bump 213 and the sidewall of the second bump 223 can contact each other, thereby enhancing the strength of the bendable supporting region. Wherein a surface of the first planar support region 212 and a surface of the second planar support region 222 are opposite.
As shown in fig. 9, in still another embodiment of the present invention, there is also provided a flexible support 200 ', the flexible support 200' and the flexible support 200 are different in that the size of the second bump 223 'of the second bendable support region of the second support layer in the flexible support 200' is larger than the size of the second bump 223 of the second bendable support region 221 of the second support layer 220.
Specifically, the side walls of the second protrusions 223 ' simultaneously contact part of the side walls of two adjacent first protrusions 213 along the longitudinal direction, and at this time, the stress relief regions 240 ' between the adjacent supporting units 230 ' are non-penetrating grooves.
That is, the stress relief area 240 ' is a plurality of independent grooves in a direction parallel to the short side of the flexible support 200 ', and the independent grooves absorb the stress generated by the dislocation movement of the first protrusion 213 and the second protrusion 223 ' during bending.
In another embodiment of the present invention, as shown in fig. 10 to 12, the present invention further provides a flexible supporting member 300, which is different from the flexible supporting member 100 in the shape and arrangement of the first protrusion 313 and the second protrusion 323.
Specifically, the flexible support 300 includes a first support layer 310 and a second support layer 320 which are stacked, the first support layer 310 includes a first bendable support region 311, and a plurality of first bumps 313 are disposed in the first bendable support region 311; the second supporting layer 320 includes a second bendable supporting region 321, wherein a plurality of second bumps 323 are disposed in the second bendable supporting region 321; in the thickness direction of the flexible support 300, the projection of the first bump 313 and the projection of the second bump 323 are not overlapped, wherein the plurality of first bumps 313 and the plurality of second bumps 323 form a plurality of support units 330, the plurality of support units 330 are arranged along the first direction, and a stress release region 340 is arranged between adjacent support units 330.
In the embodiment, the first bump 313 is a first bar-shaped bump extending from one side of the first supporting layer 310 toward the other side; the second bump 323 is a second bar-shaped bump extending from one side of the second supporting layer 320 to the opposite side, and specifically, the first bar-shaped bump and the second bar-shaped bump are both strip-shaped bumps.
In addition, the first bendable supporting region 311 is further provided with a plurality of first grooves 314, and the plurality of first grooves 314 are first strip-shaped grooves formed by recessing from one side surface of the first supporting layer 310 toward the other side surface; similarly, a plurality of second grooves 324 are further disposed in the second bendable supporting region 321, and the plurality of second grooves 324 are second strip-shaped grooves formed by recessing from one side surface of the second supporting layer 320 toward the other side surface.
After the first bendable support region 311 and the second bendable support 321 are laminated, the first bar-shaped protrusion is embedded into the corresponding second bar-shaped groove; the second strip-shaped convex blocks are embedded into the corresponding first strip-shaped grooves.
As shown in fig. 10 to 12, the first bar-shaped protrusion, the second bar-shaped protrusion, the first bar-shaped groove and the second bar-shaped groove are respectively parallel to the short side direction of the flexible supporting member 300, but not limited thereto. In other embodiments of the present invention, the first bar-shaped protrusion, the second bar-shaped protrusion, the first bar-shaped groove, and the second bar-shaped groove are respectively parallel to the long side direction of the flexible supporting member.
The first bar-shaped protrusion and the second bar-shaped protrusion are respectively parallel to the short side direction, so that the plurality of supporting units 330 are arranged along the long side direction of the flexible supporting member 300, and the long side direction of the flexible supporting member 300 corresponds to the first direction. Wherein, each supporting unit 330 includes a first stripe-shaped bump and a second stripe-shaped bump alternately arranged along the long side direction.
As shown in fig. 12 and 13, the cross-sectional view of the flexible supporting member 300 along the long side direction is schematically shown, the side wall of the first strip-shaped protrusion and the side wall of the second strip-shaped protrusion are far away from each other to form a stress releasing region 340, and the stress releasing region 340 is, for example, a strip-shaped groove parallel to the short side direction. Stress relief regions formed by the side walls of the bar-shaped protrusions away from each other can also be used for absorbing stress generated by bending the flexible support 300. In addition, the strip-shaped convex blocks are of a whole-block structure extending from one side edge of the supporting layer to the other opposite side edge, so that the strip-shaped convex blocks have better strength support for the bendable supporting area.
In this embodiment, the stress releasing regions 340 are, for example, strip-shaped grooves parallel to the short side direction, the supporting units 330 are arranged along the long side direction of the flexible supporting member 300, and the long side direction of the flexible supporting member 300 corresponds to the first direction. That is, the extension direction of the stress relief regions 340 is perpendicular to the first direction in which the support units 330 are arranged.
As shown in fig. 10 and 11, the first supporting layer 310 further includes a first planar supporting region 312, the first planar supporting region 312 is disposed at two opposite sides of the first bendable supporting region 311; the second supporting layer 320 further includes a second planar supporting region 322, and the second planar supporting region 322 is disposed at two opposite sides of the second bendable supporting region 321. The first planar supporting area 312 and the second planar supporting area 322 are respectively used to enhance the impact resistance of the planar display area of the display unit, and the size of the planar display area can be adjusted according to actual requirements, so that the planar display area is partially covered or completely covered by the planar supporting area.
In a preferred embodiment, the first planar supporting region 312 and the second planar supporting region 322 are combined to form an integrated structure by means of attaching or welding, wherein the first bendable supporting region 311 and the second bendable supporting region 321 maintain a double-layer structure after being combined. When the first bendable supporting region 311 and the second bendable supporting region 321 of the double-layer structure are bent, the plurality of first bumps 313 and the plurality of second bumps 323 move in a staggered manner, so that the release of the bending stress is realized. In addition, the released bending stress is absorbed by the stress releasing region 340.
In addition, the top of each first bump 313 protrudes from the surface of the first planar supporting region 312 of the first supporting layer 310; the top of each second bump 323 respectively protrudes from the surface of the second planar support region 322 of the second support layer 320; to ensure that the first protrusions 313 can be inserted or plugged into the corresponding second grooves 324, and the second protrusions 323 can be inserted or plugged into the corresponding first grooves 314. Wherein a surface of the first planar support zone 312 is opposite a surface of the second planar support zone 322.
In a preferred embodiment, the flexible supporting member includes at least two supporting layers, and the specific structure of each supporting layer can refer to the description of the above embodiment to further release the bending stress of the flexible display panel, and the specific structure can be set according to practical situations, and is not limited specifically herein.
As shown in fig. 14 and 15, the present invention also provides a flexible display panel 1000, which includes a display unit 1100 and a flexible support 300 disposed at a backside of the display unit 1100. The back side of the display unit 1100 is a side away from the light emitting side of the display unit 1100. The structure of the flexible support 300 can be seen in the above embodiments.
The first bendable supporting region 311 and the second bendable supporting region 321 of the flexible supporting member 300 are opposite and correspond to the bendable display region 1101 of the display unit 1100; the first and second planar support regions 312 and 322 of the flexible support 300 correspond to the planar display region 1102 of the display unit 1100, respectively.
The first bendable supporting region 311 and the second bendable supporting region 321 opposite to the flexible supporting member 300 include a first bump 313, a second bump 323 and a stress releasing region 340, which are alternately arranged, wherein when the first bendable supporting region 311 and the second bendable supporting region 321 are bent, the plurality of first bumps 313 and the plurality of second bumps 323 are displaced from each other, so as to release the bending stress. In addition, the released bending stress is absorbed by the stress releasing region 340, so as to prevent the transmission of the bending stress towards the bendable display region 1101 of the display unit 1100 from damaging the film layers in the bendable display region 1101, improve the service life of the bendable display region 1101 of the display unit 1100, and reduce the occurrence of "creases", "white lines", and the like.
In addition, the first planar supporting region 312 and the second planar supporting region 322 are respectively used for supporting the planar display region 1102 of the display unit 1100, and the planar display region 1102 is, for example, a non-bendable display region.
In this embodiment, the first supporting layer 310 of the flexible supporting member 300 contacts the back side of the display unit 1100, but not limited thereto. In other embodiments of the present invention, it is also possible that the second support layer 320 of the flexible support 300 contacts the back side of the display unit 1100.
In addition, the flexible supports 300 in the flexible display panel 1000 may be replaced with the flexible supports 100 and 200.
It can be understood that the bendable supporting region and the planar supporting region of the flexible supporting member are respectively disposed corresponding to the bendable display region and the planar display region of the display unit, and are not limited to the arrangement manner of the above embodiment, for example, the flexible supporting member may be completely a bendable supporting region without including a planar supporting region, and may be specifically disposed according to the actual situation.
The invention also provides a display device which comprises the flexible display panel.
In summary, the present invention provides a flexible supporting member, a flexible display panel and a display device, wherein a bendable supporting region of the flexible supporting member adopts a double-layer supporting layer structure, the double-layer supporting structure includes a plurality of first bumps, a plurality of second bumps and a stress releasing region, which are not overlapped, when bending, the plurality of first bumps and the plurality of second bumps move in a dislocation manner, so as to release stress generated by bending, and the stress releasing region is utilized to absorb the stress, thereby preventing the stress from being transmitted to a film layer of the bendable displaying region of a display unit of the flexible display panel in the flexible display panel to damage the display unit, improving the service life of the bendable displaying region of the flexible display panel, and reducing the occurrence of "creases", "white lines", and other phenomena.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. It is to be noted that the present invention may take various other embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A flexible support, comprising:
the first support layer comprises a first bendable support area, and a plurality of first convex blocks are arranged in the first bendable support area; and
the second supporting layer is laminated on one side of the first supporting layer and comprises a second bendable supporting area opposite to the first bendable supporting area, a plurality of second convex blocks are arranged in the second bendable supporting area, and the projection of each first convex block and the projection of each second convex block are not overlapped in the thickness direction of the flexible supporting element;
the first bumps and the second bumps form a plurality of supporting units, the supporting units are arranged along a first direction, and a stress release area is arranged between every two adjacent supporting units.
2. The flexible support of claim 1 wherein the first bendable support region further comprises a first plurality of grooves, the first plurality of grooves opposing the second plurality of bumps; the second bendable supporting area further comprises a plurality of second grooves, and the second grooves are opposite to the first bumps; the first bumps are respectively arranged in the second grooves, and the second bumps are respectively arranged in the first grooves.
3. The flexible support of claim 2 wherein the stress relief region comprises a groove structure between the first bendable support region and the second bendable support region.
4. The flexible support of claim 3, wherein the groove structure is a through-groove or a non-through-groove extending from one side edge of the flexible support toward an opposite side edge.
5. The flexible support of claim 4, wherein the through slot comprises a strip-shaped groove or a dogleg-shaped groove.
6. The flexible support of claim 1, wherein each of the first protrusions and each of the second protrusions are alternately disposed in each of the support units.
7. The flexible support of claim 6, wherein each of the first protrusions and each of the second protrusions are aligned or offset.
8. The flexible support of claim 1, wherein each of the first protrusions and each of the second protrusions are elongated protrusions extending from one side of the flexible support toward an opposite side.
9. A flexible display panel, comprising a display unit, wherein the display unit comprises a bendable display area and two planar display areas located at two sides of the bendable display area, and the flexible support member according to any one of claims 1 to 8 is disposed at a back side of the bendable display area.
10. A display device characterized in that the display device comprises a flexible display panel as claimed in claim 9.
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| CN202110614910.9A CN113470518B (en) | 2021-06-02 | 2021-06-02 | Flexible support piece, flexible display panel and display device |
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| CN113470518B (en) | 2022-11-18 |
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